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 # extra breadcrumbs preceding the home link
  89 our @extra_breadcrumbs = ();
  90
  91 # name of your site or organization to appear in page titles
  92 # replace this with something more descriptive for clearer bookmarks
  93 our $site_name = "++GITWEB_SITENAME++"
  94                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  95
  96 # html snippet to include in the <head> section of each page
  97 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
  98 # filename of html text to include at top of each page
  99 our $site_header = "++GITWEB_SITE_HEADER++";
 100 # html text to include at home page
 101 our $home_text = "++GITWEB_HOMETEXT++";
 102 # filename of html text to include at bottom of each page
 103 our $site_footer = "++GITWEB_SITE_FOOTER++";
 104
 105 # URI of stylesheets
 106 our @stylesheets = ("++GITWEB_CSS++");
 107 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 108 our $stylesheet = undef;
 109 # URI of GIT logo (72x27 size)
 110 our $logo = "++GITWEB_LOGO++";
 111 # URI of GIT favicon, assumed to be image/png type
 112 our $favicon = "++GITWEB_FAVICON++";
 113 # URI of gitweb.js (JavaScript code for gitweb)
 114 our $javascript = "++GITWEB_JS++";
 115
 116 # URI and label (title) of GIT logo link
 117 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 118 #our $logo_label = "git documentation";
 119 our $logo_url = "http://git-scm.com/";
 120 our $logo_label = "git homepage";
 121
 122 # source of projects list
 123 our $projects_list = "++GITWEB_LIST++";
 124
 125 # the width (in characters) of the projects list "Description" column
 126 our $projects_list_description_width = 25;
 127
 128 # group projects by category on the projects list
 129 # (enabled if this variable evaluates to true)
 130 our $projects_list_group_categories = 0;
 131
 132 # default category if none specified
 133 # (leave the empty string for no category)
 134 our $project_list_default_category = "";
 135
 136 # default order of projects list
 137 # valid values are none, project, descr, owner, and age
 138 our $default_projects_order = "project";
 139
 140 # show repository only if this file exists
 141 # (only effective if this variable evaluates to true)
 142 our $export_ok = "++GITWEB_EXPORT_OK++";
 143
 144 # don't generate age column on the projects list page
 145 our $omit_age_column = 0;
 146
 147 # don't generate information about owners of repositories
 148 our $omit_owner=0;
 149
 150 # show repository only if this subroutine returns true
 151 # when given the path to the project, for example:
 152 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 153 our $export_auth_hook = undef;
 154
 155 # only allow viewing of repositories also shown on the overview page
 156 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 157
 158 # list of git base URLs used for URL to where fetch project from,
 159 # i.e. full URL is "$git_base_url/$project"
 160 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 161
 162 # default blob_plain mimetype and default charset for text/plain blob
 163 our $default_blob_plain_mimetype = 'text/plain';
 164 our $default_text_plain_charset  = undef;
 165
 166 # file to use for guessing MIME types before trying /etc/mime.types
 167 # (relative to the current git repository)
 168 our $mimetypes_file = undef;
 169
 170 # assume this charset if line contains non-UTF-8 characters;
 171 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 172 # for which encoding all byte sequences are valid, for example
 173 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 174 # could be even 'utf-8' for the old behavior)
 175 our $fallback_encoding = 'latin1';
 176
 177 # rename detection options for git-diff and git-diff-tree
 178 # - default is '-M', with the cost proportional to
 179 #   (number of removed files) * (number of new files).
 180 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 181 #   (number of changed files + number of removed files) * (number of new files)
 182 # - even more costly is '-C', '--find-copies-harder' with cost
 183 #   (number of files in the original tree) * (number of new files)
 184 # - one might want to include '-B' option, e.g. '-B', '-M'
 185 our @diff_opts = ('-M'); # taken from git_commit
 186
 187 # Disables features that would allow repository owners to inject script into
 188 # the gitweb domain.
 189 our $prevent_xss = 0;
 190
 191 # Path to the highlight executable to use (must be the one from
 192 # http://www.andre-simon.de due to assumptions about parameters and output).
 193 # Useful if highlight is not installed on your webserver's PATH.
 194 # [Default: highlight]
 195 our $highlight_bin = "++HIGHLIGHT_BIN++";
 196
 197 # information about snapshot formats that gitweb is capable of serving
 198 our %known_snapshot_formats = (
 199         # name => {
 200         #       'display' => display name,
 201         #       'type' => mime type,
 202         #       'suffix' => filename suffix,
 203         #       'format' => --format for git-archive,
 204         #       'compressor' => [compressor command and arguments]
 205         #                       (array reference, optional)
 206         #       'disabled' => boolean (optional)}
 207         #
 208         'tgz' => {
 209                 'display' => 'tar.gz',
 210                 'type' => 'application/x-gzip',
 211                 'suffix' => '.tar.gz',
 212                 'format' => 'tar',
 213                 'compressor' => ['gzip', '-n']},
 214
 215         'tbz2' => {
 216                 'display' => 'tar.bz2',
 217                 'type' => 'application/x-bzip2',
 218                 'suffix' => '.tar.bz2',
 219                 'format' => 'tar',
 220                 'compressor' => ['bzip2']},
 221
 222         'txz' => {
 223                 'display' => 'tar.xz',
 224                 'type' => 'application/x-xz',
 225                 'suffix' => '.tar.xz',
 226                 'format' => 'tar',
 227                 'compressor' => ['xz'],
 228                 'disabled' => 1},
 229
 230         'zip' => {
 231                 'display' => 'zip',
 232                 'type' => 'application/x-zip',
 233                 'suffix' => '.zip',
 234                 'format' => 'zip'},
 235 );
 236
 237 # Aliases so we understand old gitweb.snapshot values in repository
 238 # configuration.
 239 our %known_snapshot_format_aliases = (
 240         'gzip'  => 'tgz',
 241         'bzip2' => 'tbz2',
 242         'xz'    => 'txz',
 243
 244         # backward compatibility: legacy gitweb config support
 245         'x-gzip' => undef, 'gz' => undef,
 246         'x-bzip2' => undef, 'bz2' => undef,
 247         'x-zip' => undef, '' => undef,
 248 );
 249
 250 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 251 # are changed, it may be appropriate to change these values too via
 252 # $GITWEB_CONFIG.
 253 our %avatar_size = (
 254         'default' => 16,
 255         'double'  => 32
 256 );
 257
 258 # Used to set the maximum load that we will still respond to gitweb queries.
 259 # If server load exceed this value then return "503 server busy" error.
 260 # If gitweb cannot determined server load, it is taken to be 0.
 261 # Leave it undefined (or set to 'undef') to turn off load checking.
 262 our $maxload = 300;
 263
 264 # configuration for 'highlight' (http://www.andre-simon.de/)
 265 # match by basename
 266 our %highlight_basename = (
 267         #'Program' => 'py',
 268         #'Library' => 'py',
 269         'SConstruct' => 'py', # SCons equivalent of Makefile
 270         'Makefile' => 'make',
 271 );
 272 # match by extension
 273 our %highlight_ext = (
 274         # main extensions, defining name of syntax;
 275         # see files in /usr/share/highlight/langDefs/ directory
 276         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 277         # alternate extensions, see /etc/highlight/filetypes.conf
 278         (map { $_ => 'c'   } qw(c h)),
 279         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 280         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 281         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 282         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 283         (map { $_ => 'make'} qw(make mak mk)),
 284         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 285 );
 286
 287 # You define site-wide feature defaults here; override them with
 288 # $GITWEB_CONFIG as necessary.
 289 our %feature = (
 290         # feature => {
 291         #       'sub' => feature-sub (subroutine),
 292         #       'override' => allow-override (boolean),
 293         #       'default' => [ default options...] (array reference)}
 294         #
 295         # if feature is overridable (it means that allow-override has true value),
 296         # then feature-sub will be called with default options as parameters;
 297         # return value of feature-sub indicates if to enable specified feature
 298         #
 299         # if there is no 'sub' key (no feature-sub), then feature cannot be
 300         # overridden
 301         #
 302         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 303         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 304         # is enabled
 305
 306         # Enable the 'blame' blob view, showing the last commit that modified
 307         # each line in the file. This can be very CPU-intensive.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'blame'}{'default'} = [1];
 311         # To have project specific config enable override in $GITWEB_CONFIG
 312         # $feature{'blame'}{'override'} = 1;
 313         # and in project config gitweb.blame = 0|1;
 314         'blame' => {
 315                 'sub' => sub { feature_bool('blame', @_) },
 316                 'override' => 0,
 317                 'default' => [0]},
 318
 319         # Enable the 'snapshot' link, providing a compressed archive of any
 320         # tree. This can potentially generate high traffic if you have large
 321         # project.
 322
 323         # Value is a list of formats defined in %known_snapshot_formats that
 324         # you wish to offer.
 325         # To disable system wide have in $GITWEB_CONFIG
 326         # $feature{'snapshot'}{'default'} = [];
 327         # To have project specific config enable override in $GITWEB_CONFIG
 328         # $feature{'snapshot'}{'override'} = 1;
 329         # and in project config, a comma-separated list of formats or "none"
 330         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 331         'snapshot' => {
 332                 'sub' => \&feature_snapshot,
 333                 'override' => 0,
 334                 'default' => ['tgz']},
 335
 336         # Enable text search, which will list the commits which match author,
 337         # committer or commit text to a given string.  Enabled by default.
 338         # Project specific override is not supported.
 339         #
 340         # Note that this controls all search features, which means that if
 341         # it is disabled, then 'grep' and 'pickaxe' search would also be
 342         # disabled.
 343         'search' => {
 344                 'override' => 0,
 345                 'default' => [1]},
 346
 347         # Enable grep search, which will list the files in currently selected
 348         # tree containing the given string. Enabled by default. This can be
 349         # potentially CPU-intensive, of course.
 350         # Note that you need to have 'search' feature enabled too.
 351
 352         # To enable system wide have in $GITWEB_CONFIG
 353         # $feature{'grep'}{'default'} = [1];
 354         # To have project specific config enable override in $GITWEB_CONFIG
 355         # $feature{'grep'}{'override'} = 1;
 356         # and in project config gitweb.grep = 0|1;
 357         'grep' => {
 358                 'sub' => sub { feature_bool('grep', @_) },
 359                 'override' => 0,
 360                 'default' => [1]},
 361
 362         # Enable the pickaxe search, which will list the commits that modified
 363         # a given string in a file. This can be practical and quite faster
 364         # alternative to 'blame', but still potentially CPU-intensive.
 365         # Note that you need to have 'search' feature enabled too.
 366
 367         # To enable system wide have in $GITWEB_CONFIG
 368         # $feature{'pickaxe'}{'default'} = [1];
 369         # To have project specific config enable override in $GITWEB_CONFIG
 370         # $feature{'pickaxe'}{'override'} = 1;
 371         # and in project config gitweb.pickaxe = 0|1;
 372         'pickaxe' => {
 373                 'sub' => sub { feature_bool('pickaxe', @_) },
 374                 'override' => 0,
 375                 'default' => [1]},
 376
 377         # Enable showing size of blobs in a 'tree' view, in a separate
 378         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 379
 380         # To disable system wide have in $GITWEB_CONFIG
 381         # $feature{'show-sizes'}{'default'} = [0];
 382         # To have project specific config enable override in $GITWEB_CONFIG
 383         # $feature{'show-sizes'}{'override'} = 1;
 384         # and in project config gitweb.showsizes = 0|1;
 385         'show-sizes' => {
 386                 'sub' => sub { feature_bool('showsizes', @_) },
 387                 'override' => 0,
 388                 'default' => [1]},
 389
 390         # Make gitweb use an alternative format of the URLs which can be
 391         # more readable and natural-looking: project name is embedded
 392         # directly in the path and the query string contains other
 393         # auxiliary information. All gitweb installations recognize
 394         # URL in either format; this configures in which formats gitweb
 395         # generates links.
 396
 397         # To enable system wide have in $GITWEB_CONFIG
 398         # $feature{'pathinfo'}{'default'} = [1];
 399         # Project specific override is not supported.
 400
 401         # Note that you will need to change the default location of CSS,
 402         # favicon, logo and possibly other files to an absolute URL. Also,
 403         # if gitweb.cgi serves as your indexfile, you will need to force
 404         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 405         'pathinfo' => {
 406                 'override' => 0,
 407                 'default' => [0]},
 408
 409         # Make gitweb consider projects in project root subdirectories
 410         # to be forks of existing projects. Given project $projname.git,
 411         # projects matching $projname/*.git will not be shown in the main
 412         # projects list, instead a '+' mark will be added to $projname
 413         # there and a 'forks' view will be enabled for the project, listing
 414         # all the forks. If project list is taken from a file, forks have
 415         # to be listed after the main project.
 416
 417         # To enable system wide have in $GITWEB_CONFIG
 418         # $feature{'forks'}{'default'} = [1];
 419         # Project specific override is not supported.
 420         'forks' => {
 421                 'override' => 0,
 422                 'default' => [0]},
 423
 424         # Insert custom links to the action bar of all project pages.
 425         # This enables you mainly to link to third-party scripts integrating
 426         # into gitweb; e.g. git-browser for graphical history representation
 427         # or custom web-based repository administration interface.
 428
 429         # The 'default' value consists of a list of triplets in the form
 430         # (label, link, position) where position is the label after which
 431         # to insert the link and link is a format string where %n expands
 432         # to the project name, %f to the project path within the filesystem,
 433         # %h to the current hash (h gitweb parameter) and %b to the current
 434         # hash base (hb gitweb parameter); %% expands to %.
 435
 436         # To enable system wide have in $GITWEB_CONFIG e.g.
 437         # $feature{'actions'}{'default'} = [('graphiclog',
 438         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 439         # Project specific override is not supported.
 440         'actions' => {
 441                 'override' => 0,
 442                 'default' => []},
 443
 444         # Allow gitweb scan project content tags of project repository,
 445         # and display the popular Web 2.0-ish "tag cloud" near the projects
 446         # list.  Note that this is something COMPLETELY different from the
 447         # normal Git tags.
 448
 449         # gitweb by itself can show existing tags, but it does not handle
 450         # tagging itself; you need to do it externally, outside gitweb.
 451         # The format is described in git_get_project_ctags() subroutine.
 452         # You may want to install the HTML::TagCloud Perl module to get
 453         # a pretty tag cloud instead of just a list of tags.
 454
 455         # To enable system wide have in $GITWEB_CONFIG
 456         # $feature{'ctags'}{'default'} = [1];
 457         # Project specific override is not supported.
 458
 459         # In the future whether ctags editing is enabled might depend
 460         # on the value, but using 1 should always mean no editing of ctags.
 461         'ctags' => {
 462                 'override' => 0,
 463                 'default' => [0]},
 464
 465         # The maximum number of patches in a patchset generated in patch
 466         # view. Set this to 0 or undef to disable patch view, or to a
 467         # negative number to remove any limit.
 468
 469         # To disable system wide have in $GITWEB_CONFIG
 470         # $feature{'patches'}{'default'} = [0];
 471         # To have project specific config enable override in $GITWEB_CONFIG
 472         # $feature{'patches'}{'override'} = 1;
 473         # and in project config gitweb.patches = 0|n;
 474         # where n is the maximum number of patches allowed in a patchset.
 475         'patches' => {
 476                 'sub' => \&feature_patches,
 477                 'override' => 0,
 478                 'default' => [16]},
 479
 480         # Avatar support. When this feature is enabled, views such as
 481         # shortlog or commit will display an avatar associated with
 482         # the email of the committer(s) and/or author(s).
 483
 484         # Currently available providers are gravatar and picon.
 485         # If an unknown provider is specified, the feature is disabled.
 486
 487         # Gravatar depends on Digest::MD5.
 488         # Picon currently relies on the indiana.edu database.
 489
 490         # To enable system wide have in $GITWEB_CONFIG
 491         # $feature{'avatar'}{'default'} = ['<provider>'];
 492         # where <provider> is either gravatar or picon.
 493         # To have project specific config enable override in $GITWEB_CONFIG
 494         # $feature{'avatar'}{'override'} = 1;
 495         # and in project config gitweb.avatar = <provider>;
 496         'avatar' => {
 497                 'sub' => \&feature_avatar,
 498                 'override' => 0,
 499                 'default' => ['']},
 500
 501         # Enable displaying how much time and how many git commands
 502         # it took to generate and display page.  Disabled by default.
 503         # Project specific override is not supported.
 504         'timed' => {
 505                 'override' => 0,
 506                 'default' => [0]},
 507
 508         # Enable turning some links into links to actions which require
 509         # JavaScript to run (like 'blame_incremental').  Not enabled by
 510         # default.  Project specific override is currently not supported.
 511         'javascript-actions' => {
 512                 'override' => 0,
 513                 'default' => [0]},
 514
 515         # Enable and configure ability to change common timezone for dates
 516         # in gitweb output via JavaScript.  Enabled by default.
 517         # Project specific override is not supported.
 518         'javascript-timezone' => {
 519                 'override' => 0,
 520                 'default' => [
 521                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 522                                      # or undef to turn off this feature
 523                         'gitweb_tz', # name of cookie where to store selected timezone
 524                         'datetime',  # CSS class used to mark up dates for manipulation
 525                 ]},
 526
 527         # Syntax highlighting support. This is based on Daniel Svensson's
 528         # and Sham Chukoury's work in gitweb-xmms2.git.
 529         # It requires the 'highlight' program present in $PATH,
 530         # and therefore is disabled by default.
 531
 532         # To enable system wide have in $GITWEB_CONFIG
 533         # $feature{'highlight'}{'default'} = [1];
 534
 535         'highlight' => {
 536                 'sub' => sub { feature_bool('highlight', @_) },
 537                 'override' => 0,
 538                 'default' => [0]},
 539
 540         # Enable displaying of remote heads in the heads list
 541
 542         # To enable system wide have in $GITWEB_CONFIG
 543         # $feature{'remote_heads'}{'default'} = [1];
 544         # To have project specific config enable override in $GITWEB_CONFIG
 545         # $feature{'remote_heads'}{'override'} = 1;
 546         # and in project config gitweb.remoteheads = 0|1;
 547         'remote_heads' => {
 548                 'sub' => sub { feature_bool('remote_heads', @_) },
 549                 'override' => 0,
 550                 'default' => [0]},
 551 );
 552
 553 sub gitweb_get_feature {
 554         my ($name) = @_;
 555         return unless exists $feature{$name};
 556         my ($sub, $override, @defaults) = (
 557                 $feature{$name}{'sub'},
 558                 $feature{$name}{'override'},
 559                 @{$feature{$name}{'default'}});
 560         # project specific override is possible only if we have project
 561         our $git_dir; # global variable, declared later
 562         if (!$override || !defined $git_dir) {
 563                 return @defaults;
 564         }
 565         if (!defined $sub) {
 566                 warn "feature $name is not overridable";
 567                 return @defaults;
 568         }
 569         return $sub->(@defaults);
 570 }
 571
 572 # A wrapper to check if a given feature is enabled.
 573 # With this, you can say
 574 #
 575 #   my $bool_feat = gitweb_check_feature('bool_feat');
 576 #   gitweb_check_feature('bool_feat') or somecode;
 577 #
 578 # instead of
 579 #
 580 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 581 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 582 #
 583 sub gitweb_check_feature {
 584         return (gitweb_get_feature(@_))[0];
 585 }
 586
 587
 588 sub feature_bool {
 589         my $key = shift;
 590         my ($val) = git_get_project_config($key, '--bool');
 591
 592         if (!defined $val) {
 593                 return ($_[0]);
 594         } elsif ($val eq 'true') {
 595                 return (1);
 596         } elsif ($val eq 'false') {
 597                 return (0);
 598         }
 599 }
 600
 601 sub feature_snapshot {
 602         my (@fmts) = @_;
 603
 604         my ($val) = git_get_project_config('snapshot');
 605
 606         if ($val) {
 607                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 608         }
 609
 610         return @fmts;
 611 }
 612
 613 sub feature_patches {
 614         my @val = (git_get_project_config('patches', '--int'));
 615
 616         if (@val) {
 617                 return @val;
 618         }
 619
 620         return ($_[0]);
 621 }
 622
 623 sub feature_avatar {
 624         my @val = (git_get_project_config('avatar'));
 625
 626         return @val ? @val : @_;
 627 }
 628
 629 # checking HEAD file with -e is fragile if the repository was
 630 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 631 # and then pruned.
 632 sub check_head_link {
 633         my ($dir) = @_;
 634         my $headfile = "$dir/HEAD";
 635         return ((-e $headfile) ||
 636                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 637 }
 638
 639 sub check_export_ok {
 640         my ($dir) = @_;
 641         return (check_head_link($dir) &&
 642                 (!$export_ok || -e "$dir/$export_ok") &&
 643                 (!$export_auth_hook || $export_auth_hook->($dir)));
 644 }
 645
 646 # process alternate names for backward compatibility
 647 # filter out unsupported (unknown) snapshot formats
 648 sub filter_snapshot_fmts {
 649         my @fmts = @_;
 650
 651         @fmts = map {
 652                 exists $known_snapshot_format_aliases{$_} ?
 653                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 654         @fmts = grep {
 655                 exists $known_snapshot_formats{$_} &&
 656                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 657 }
 658
 659 # If it is set to code reference, it is code that it is to be run once per
 660 # request, allowing updating configurations that change with each request,
 661 # while running other code in config file only once.
 662 #
 663 # Otherwise, if it is false then gitweb would process config file only once;
 664 # if it is true then gitweb config would be run for each request.
 665 our $per_request_config = 1;
 666
 667 # read and parse gitweb config file given by its parameter.
 668 # returns true on success, false on recoverable error, allowing
 669 # to chain this subroutine, using first file that exists.
 670 # dies on errors during parsing config file, as it is unrecoverable.
 671 sub read_config_file {
 672         my $filename = shift;
 673         return unless defined $filename;
 674         # die if there are errors parsing config file
 675         if (-e $filename) {
 676                 do $filename;
 677                 die $@ if $@;
 678                 return 1;
 679         }
 680         return;
 681 }
 682
 683 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 684 sub evaluate_gitweb_config {
 685         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 686         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 687         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 688
 689         # Protect against duplications of file names, to not read config twice.
 690         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 691         # there possibility of duplication of filename there doesn't matter.
 692         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 693         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 694
 695         # Common system-wide settings for convenience.
 696         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 697         read_config_file($GITWEB_CONFIG_COMMON);
 698
 699         # Use first config file that exists.  This means use the per-instance
 700         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 701         read_config_file($GITWEB_CONFIG) and return;
 702         read_config_file($GITWEB_CONFIG_SYSTEM);
 703 }
 704
 705 # Get loadavg of system, to compare against $maxload.
 706 # Currently it requires '/proc/loadavg' present to get loadavg;
 707 # if it is not present it returns 0, which means no load checking.
 708 sub get_loadavg {
 709         if( -e '/proc/loadavg' ){
 710                 open my $fd, '<', '/proc/loadavg'
 711                         or return 0;
 712                 my @load = split(/\s+/, scalar <$fd>);
 713                 close $fd;
 714
 715                 # The first three columns measure CPU and IO utilization of the last one,
 716                 # five, and 10 minute periods.  The fourth column shows the number of
 717                 # currently running processes and the total number of processes in the m/n
 718                 # format.  The last column displays the last process ID used.
 719                 return $load[0] || 0;
 720         }
 721         # additional checks for load average should go here for things that don't export
 722         # /proc/loadavg
 723
 724         return 0;
 725 }
 726
 727 # version of the core git binary
 728 our $git_version;
 729 sub evaluate_git_version {
 730         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 731         $number_of_git_cmds++;
 732 }
 733
 734 sub check_loadavg {
 735         if (defined $maxload && get_loadavg() > $maxload) {
 736                 die_error(503, "The load average on the server is too high");
 737         }
 738 }
 739
 740 # ======================================================================
 741 # input validation and dispatch
 742
 743 # input parameters can be collected from a variety of sources (presently, CGI
 744 # and PATH_INFO), so we define an %input_params hash that collects them all
 745 # together during validation: this allows subsequent uses (e.g. href()) to be
 746 # agnostic of the parameter origin
 747
 748 our %input_params = ();
 749
 750 # input parameters are stored with the long parameter name as key. This will
 751 # also be used in the href subroutine to convert parameters to their CGI
 752 # equivalent, and since the href() usage is the most frequent one, we store
 753 # the name -> CGI key mapping here, instead of the reverse.
 754 #
 755 # XXX: Warning: If you touch this, check the search form for updating,
 756 # too.
 757
 758 our @cgi_param_mapping = (
 759         project => "p",
 760         action => "a",
 761         file_name => "f",
 762         file_parent => "fp",
 763         hash => "h",
 764         hash_parent => "hp",
 765         hash_base => "hb",
 766         hash_parent_base => "hpb",
 767         page => "pg",
 768         order => "o",
 769         searchtext => "s",
 770         searchtype => "st",
 771         snapshot_format => "sf",
 772         extra_options => "opt",
 773         search_use_regexp => "sr",
 774         ctag => "by_tag",
 775         diff_style => "ds",
 776         project_filter => "pf",
 777         # this must be last entry (for manipulation from JavaScript)
 778         javascript => "js"
 779 );
 780 our %cgi_param_mapping = @cgi_param_mapping;
 781
 782 # we will also need to know the possible actions, for validation
 783 our %actions = (
 784         "blame" => \&git_blame,
 785         "blame_incremental" => \&git_blame_incremental,
 786         "blame_data" => \&git_blame_data,
 787         "blobdiff" => \&git_blobdiff,
 788         "blobdiff_plain" => \&git_blobdiff_plain,
 789         "blob" => \&git_blob,
 790         "blob_plain" => \&git_blob_plain,
 791         "commitdiff" => \&git_commitdiff,
 792         "commitdiff_plain" => \&git_commitdiff_plain,
 793         "commit" => \&git_commit,
 794         "forks" => \&git_forks,
 795         "heads" => \&git_heads,
 796         "history" => \&git_history,
 797         "log" => \&git_log,
 798         "patch" => \&git_patch,
 799         "patches" => \&git_patches,
 800         "remotes" => \&git_remotes,
 801         "rss" => \&git_rss,
 802         "atom" => \&git_atom,
 803         "search" => \&git_search,
 804         "search_help" => \&git_search_help,
 805         "shortlog" => \&git_shortlog,
 806         "summary" => \&git_summary,
 807         "tag" => \&git_tag,
 808         "tags" => \&git_tags,
 809         "tree" => \&git_tree,
 810         "snapshot" => \&git_snapshot,
 811         "object" => \&git_object,
 812         # those below don't need $project
 813         "opml" => \&git_opml,
 814         "project_list" => \&git_project_list,
 815         "project_index" => \&git_project_index,
 816 );
 817
 818 # finally, we have the hash of allowed extra_options for the commands that
 819 # allow them
 820 our %allowed_options = (
 821         "--no-merges" => [ qw(rss atom log shortlog history) ],
 822 );
 823
 824 # fill %input_params with the CGI parameters. All values except for 'opt'
 825 # should be single values, but opt can be an array. We should probably
 826 # build an array of parameters that can be multi-valued, but since for the time
 827 # being it's only this one, we just single it out
 828 sub evaluate_query_params {
 829         our $cgi;
 830
 831         while (my ($name, $symbol) = each %cgi_param_mapping) {
 832                 if ($symbol eq 'opt') {
 833                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->param($symbol) ];
 834                 } else {
 835                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 836                 }
 837         }
 838 }
 839
 840 # now read PATH_INFO and update the parameter list for missing parameters
 841 sub evaluate_path_info {
 842         return if defined $input_params{'project'};
 843         return if !$path_info;
 844         $path_info =~ s,^/+,,;
 845         return if !$path_info;
 846
 847         # find which part of PATH_INFO is project
 848         my $project = $path_info;
 849         $project =~ s,/+$,,;
 850         while ($project && !check_head_link("$projectroot/$project")) {
 851                 $project =~ s,/*[^/]*$,,;
 852         }
 853         return unless $project;
 854         $input_params{'project'} = $project;
 855
 856         # do not change any parameters if an action is given using the query string
 857         return if $input_params{'action'};
 858         $path_info =~ s,^\Q$project\E/*,,;
 859
 860         # next, check if we have an action
 861         my $action = $path_info;
 862         $action =~ s,/.*$,,;
 863         if (exists $actions{$action}) {
 864                 $path_info =~ s,^$action/*,,;
 865                 $input_params{'action'} = $action;
 866         }
 867
 868         # list of actions that want hash_base instead of hash, but can have no
 869         # pathname (f) parameter
 870         my @wants_base = (
 871                 'tree',
 872                 'history',
 873         );
 874
 875         # we want to catch, among others
 876         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 877         my ($parentrefname, $parentpathname, $refname, $pathname) =
 878                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 879
 880         # first, analyze the 'current' part
 881         if (defined $pathname) {
 882                 # we got "branch:filename" or "branch:dir/"
 883                 # we could use git_get_type(branch:pathname), but:
 884                 # - it needs $git_dir
 885                 # - it does a git() call
 886                 # - the convention of terminating directories with a slash
 887                 #   makes it superfluous
 888                 # - embedding the action in the PATH_INFO would make it even
 889                 #   more superfluous
 890                 $pathname =~ s,^/+,,;
 891                 if (!$pathname || substr($pathname, -1) eq "/") {
 892                         $input_params{'action'} ||= "tree";
 893                         $pathname =~ s,/$,,;
 894                 } else {
 895                         # the default action depends on whether we had parent info
 896                         # or not
 897                         if ($parentrefname) {
 898                                 $input_params{'action'} ||= "blobdiff_plain";
 899                         } else {
 900                                 $input_params{'action'} ||= "blob_plain";
 901                         }
 902                 }
 903                 $input_params{'hash_base'} ||= $refname;
 904                 $input_params{'file_name'} ||= $pathname;
 905         } elsif (defined $refname) {
 906                 # we got "branch". In this case we have to choose if we have to
 907                 # set hash or hash_base.
 908                 #
 909                 # Most of the actions without a pathname only want hash to be
 910                 # set, except for the ones specified in @wants_base that want
 911                 # hash_base instead. It should also be noted that hand-crafted
 912                 # links having 'history' as an action and no pathname or hash
 913                 # set will fail, but that happens regardless of PATH_INFO.
 914                 if (defined $parentrefname) {
 915                         # if there is parent let the default be 'shortlog' action
 916                         # (for http://git.example.com/repo.git/A..B links); if there
 917                         # is no parent, dispatch will detect type of object and set
 918                         # action appropriately if required (if action is not set)
 919                         $input_params{'action'} ||= "shortlog";
 920                 }
 921                 if ($input_params{'action'} &&
 922                     grep { $_ eq $input_params{'action'} } @wants_base) {
 923                         $input_params{'hash_base'} ||= $refname;
 924                 } else {
 925                         $input_params{'hash'} ||= $refname;
 926                 }
 927         }
 928
 929         # next, handle the 'parent' part, if present
 930         if (defined $parentrefname) {
 931                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 932                 # someproject/blobdiff/oldrev..newrev:/filename
 933                 if ($parentpathname) {
 934                         $parentpathname =~ s,^/+,,;
 935                         $parentpathname =~ s,/$,,;
 936                         $input_params{'file_parent'} ||= $parentpathname;
 937                 } else {
 938                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 939                 }
 940                 # we assume that hash_parent_base is wanted if a path was specified,
 941                 # or if the action wants hash_base instead of hash
 942                 if (defined $input_params{'file_parent'} ||
 943                         grep { $_ eq $input_params{'action'} } @wants_base) {
 944                         $input_params{'hash_parent_base'} ||= $parentrefname;
 945                 } else {
 946                         $input_params{'hash_parent'} ||= $parentrefname;
 947                 }
 948         }
 949
 950         # for the snapshot action, we allow URLs in the form
 951         # $project/snapshot/$hash.ext
 952         # where .ext determines the snapshot and gets removed from the
 953         # passed $refname to provide the $hash.
 954         #
 955         # To be able to tell that $refname includes the format extension, we
 956         # require the following two conditions to be satisfied:
 957         # - the hash input parameter MUST have been set from the $refname part
 958         #   of the URL (i.e. they must be equal)
 959         # - the snapshot format MUST NOT have been defined already (e.g. from
 960         #   CGI parameter sf)
 961         # It's also useless to try any matching unless $refname has a dot,
 962         # so we check for that too
 963         if (defined $input_params{'action'} &&
 964                 $input_params{'action'} eq 'snapshot' &&
 965                 defined $refname && index($refname, '.') != -1 &&
 966                 $refname eq $input_params{'hash'} &&
 967                 !defined $input_params{'snapshot_format'}) {
 968                 # We loop over the known snapshot formats, checking for
 969                 # extensions. Allowed extensions are both the defined suffix
 970                 # (which includes the initial dot already) and the snapshot
 971                 # format key itself, with a prepended dot
 972                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 973                         my $hash = $refname;
 974                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 975                                 next;
 976                         }
 977                         my $sfx = $1;
 978                         # a valid suffix was found, so set the snapshot format
 979                         # and reset the hash parameter
 980                         $input_params{'snapshot_format'} = $fmt;
 981                         $input_params{'hash'} = $hash;
 982                         # we also set the format suffix to the one requested
 983                         # in the URL: this way a request for e.g. .tgz returns
 984                         # a .tgz instead of a .tar.gz
 985                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 986                         last;
 987                 }
 988         }
 989 }
 990
 991 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 992      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 993      $searchtext, $search_regexp, $project_filter);
 994 sub evaluate_and_validate_params {
 995         our $action = $input_params{'action'};
 996         if (defined $action) {
 997                 if (!validate_action($action)) {
 998                         die_error(400, "Invalid action parameter");
 999                 }
1000         }
1001
1002         # parameters which are pathnames
1003         our $project = $input_params{'project'};
1004         if (defined $project) {
1005                 if (!validate_project($project)) {
1006                         undef $project;
1007                         die_error(404, "No such project");
1008                 }
1009         }
1010
1011         our $project_filter = $input_params{'project_filter'};
1012         if (defined $project_filter) {
1013                 if (!validate_pathname($project_filter)) {
1014                         die_error(404, "Invalid project_filter parameter");
1015                 }
1016         }
1017
1018         our $file_name = $input_params{'file_name'};
1019         if (defined $file_name) {
1020                 if (!validate_pathname($file_name)) {
1021                         die_error(400, "Invalid file parameter");
1022                 }
1023         }
1024
1025         our $file_parent = $input_params{'file_parent'};
1026         if (defined $file_parent) {
1027                 if (!validate_pathname($file_parent)) {
1028                         die_error(400, "Invalid file parent parameter");
1029                 }
1030         }
1031
1032         # parameters which are refnames
1033         our $hash = $input_params{'hash'};
1034         if (defined $hash) {
1035                 if (!validate_refname($hash)) {
1036                         die_error(400, "Invalid hash parameter");
1037                 }
1038         }
1039
1040         our $hash_parent = $input_params{'hash_parent'};
1041         if (defined $hash_parent) {
1042                 if (!validate_refname($hash_parent)) {
1043                         die_error(400, "Invalid hash parent parameter");
1044                 }
1045         }
1046
1047         our $hash_base = $input_params{'hash_base'};
1048         if (defined $hash_base) {
1049                 if (!validate_refname($hash_base)) {
1050                         die_error(400, "Invalid hash base parameter");
1051                 }
1052         }
1053
1054         our @extra_options = @{$input_params{'extra_options'}};
1055         # @extra_options is always defined, since it can only be (currently) set from
1056         # CGI, and $cgi->param() returns the empty array in array context if the param
1057         # is not set
1058         foreach my $opt (@extra_options) {
1059                 if (not exists $allowed_options{$opt}) {
1060                         die_error(400, "Invalid option parameter");
1061                 }
1062                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1063                         die_error(400, "Invalid option parameter for this action");
1064                 }
1065         }
1066
1067         our $hash_parent_base = $input_params{'hash_parent_base'};
1068         if (defined $hash_parent_base) {
1069                 if (!validate_refname($hash_parent_base)) {
1070                         die_error(400, "Invalid hash parent base parameter");
1071                 }
1072         }
1073
1074         # other parameters
1075         our $page = $input_params{'page'};
1076         if (defined $page) {
1077                 if ($page =~ m/[^0-9]/) {
1078                         die_error(400, "Invalid page parameter");
1079                 }
1080         }
1081
1082         our $searchtype = $input_params{'searchtype'};
1083         if (defined $searchtype) {
1084                 if ($searchtype =~ m/[^a-z]/) {
1085                         die_error(400, "Invalid searchtype parameter");
1086                 }
1087         }
1088
1089         our $search_use_regexp = $input_params{'search_use_regexp'};
1090
1091         our $searchtext = $input_params{'searchtext'};
1092         our $search_regexp = undef;
1093         if (defined $searchtext) {
1094                 if (length($searchtext) < 2) {
1095                         die_error(403, "At least two characters are required for search parameter");
1096                 }
1097                 if ($search_use_regexp) {
1098                         $search_regexp = $searchtext;
1099                         if (!eval { qr/$search_regexp/; 1; }) {
1100                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1101                                 die_error(400, "Invalid search regexp '$search_regexp'",
1102                                           esc_html($error));
1103                         }
1104                 } else {
1105                         $search_regexp = quotemeta $searchtext;
1106                 }
1107         }
1108 }
1109
1110 # path to the current git repository
1111 our $git_dir;
1112 sub evaluate_git_dir {
1113         our $git_dir = "$projectroot/$project" if $project;
1114 }
1115
1116 our (@snapshot_fmts, $git_avatar);
1117 sub configure_gitweb_features {
1118         # list of supported snapshot formats
1119         our @snapshot_fmts = gitweb_get_feature('snapshot');
1120         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1121
1122         # check that the avatar feature is set to a known provider name,
1123         # and for each provider check if the dependencies are satisfied.
1124         # if the provider name is invalid or the dependencies are not met,
1125         # reset $git_avatar to the empty string.
1126         our ($git_avatar) = gitweb_get_feature('avatar');
1127         if ($git_avatar eq 'gravatar') {
1128                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1129         } elsif ($git_avatar eq 'picon') {
1130                 # no dependencies
1131         } else {
1132                 $git_avatar = '';
1133         }
1134 }
1135
1136 # custom error handler: 'die <message>' is Internal Server Error
1137 sub handle_errors_html {
1138         my $msg = shift; # it is already HTML escaped
1139
1140         # to avoid infinite loop where error occurs in die_error,
1141         # change handler to default handler, disabling handle_errors_html
1142         set_message("Error occurred when inside die_error:\n$msg");
1143
1144         # you cannot jump out of die_error when called as error handler;
1145         # the subroutine set via CGI::Carp::set_message is called _after_
1146         # HTTP headers are already written, so it cannot write them itself
1147         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1148 }
1149 set_message(\&handle_errors_html);
1150
1151 # dispatch
1152 sub dispatch {
1153         if (!defined $action) {
1154                 if (defined $hash) {
1155                         $action = git_get_type($hash);
1156                         $action or die_error(404, "Object does not exist");
1157                 } elsif (defined $hash_base && defined $file_name) {
1158                         $action = git_get_type("$hash_base:$file_name");
1159                         $action or die_error(404, "File or directory does not exist");
1160                 } elsif (defined $project) {
1161                         $action = 'summary';
1162                 } else {
1163                         $action = 'project_list';
1164                 }
1165         }
1166         if (!defined($actions{$action})) {
1167                 die_error(400, "Unknown action");
1168         }
1169         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1170             !$project) {
1171                 die_error(400, "Project needed");
1172         }
1173         $actions{$action}->();
1174 }
1175
1176 sub reset_timer {
1177         our $t0 = [ gettimeofday() ]
1178                 if defined $t0;
1179         our $number_of_git_cmds = 0;
1180 }
1181
1182 our $first_request = 1;
1183 sub run_request {
1184         reset_timer();
1185
1186         evaluate_uri();
1187         if ($first_request) {
1188                 evaluate_gitweb_config();
1189                 evaluate_git_version();
1190         }
1191         if ($per_request_config) {
1192                 if (ref($per_request_config) eq 'CODE') {
1193                         $per_request_config->();
1194                 } elsif (!$first_request) {
1195                         evaluate_gitweb_config();
1196                 }
1197         }
1198         check_loadavg();
1199
1200         # $projectroot and $projects_list might be set in gitweb config file
1201         $projects_list ||= $projectroot;
1202
1203         evaluate_query_params();
1204         evaluate_path_info();
1205         evaluate_and_validate_params();
1206         evaluate_git_dir();
1207
1208         configure_gitweb_features();
1209
1210         dispatch();
1211 }
1212
1213 our $is_last_request = sub { 1 };
1214 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1215 our $CGI = 'CGI';
1216 our $cgi;
1217 sub configure_as_fcgi {
1218         require CGI::Fast;
1219         our $CGI = 'CGI::Fast';
1220
1221         my $request_number = 0;
1222         # let each child service 100 requests
1223         our $is_last_request = sub { ++$request_number > 100 };
1224 }
1225 sub evaluate_argv {
1226         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1227         configure_as_fcgi()
1228                 if $script_name =~ /\.fcgi$/;
1229
1230         return unless (@ARGV);
1231
1232         require Getopt::Long;
1233         Getopt::Long::GetOptions(
1234                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1235                 'nproc|n=i' => sub {
1236                         my ($arg, $val) = @_;
1237                         return unless eval { require FCGI::ProcManager; 1; };
1238                         my $proc_manager = FCGI::ProcManager->new({
1239                                 n_processes => $val,
1240                         });
1241                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1242                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1243                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1244                 },
1245         );
1246 }
1247
1248 sub run {
1249         evaluate_argv();
1250
1251         $first_request = 1;
1252         $pre_listen_hook->()
1253                 if $pre_listen_hook;
1254
1255  REQUEST:
1256         while ($cgi = $CGI->new()) {
1257                 $pre_dispatch_hook->()
1258                         if $pre_dispatch_hook;
1259
1260                 run_request();
1261
1262                 $post_dispatch_hook->()
1263                         if $post_dispatch_hook;
1264                 $first_request = 0;
1265
1266                 last REQUEST if ($is_last_request->());
1267         }
1268
1269  DONE_GITWEB:
1270         1;
1271 }
1272
1273 run();
1274
1275 if (defined caller) {
1276         # wrapped in a subroutine processing requests,
1277         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1278         return;
1279 } else {
1280         # pure CGI script, serving single request
1281         exit;
1282 }
1283
1284 ## ======================================================================
1285 ## action links
1286
1287 # possible values of extra options
1288 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1289 # -replay => 1      - start from a current view (replay with modifications)
1290 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1291 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1292 sub href {
1293         my %params = @_;
1294         # default is to use -absolute url() i.e. $my_uri
1295         my $href = $params{-full} ? $my_url : $my_uri;
1296
1297         # implicit -replay, must be first of implicit params
1298         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1299
1300         $params{'project'} = $project unless exists $params{'project'};
1301
1302         if ($params{-replay}) {
1303                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1304                         if (!exists $params{$name}) {
1305                                 $params{$name} = $input_params{$name};
1306                         }
1307                 }
1308         }
1309
1310         my $use_pathinfo = gitweb_check_feature('pathinfo');
1311         if (defined $params{'project'} &&
1312             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1313                 # try to put as many parameters as possible in PATH_INFO:
1314                 #   - project name
1315                 #   - action
1316                 #   - hash_parent or hash_parent_base:/file_parent
1317                 #   - hash or hash_base:/filename
1318                 #   - the snapshot_format as an appropriate suffix
1319
1320                 # When the script is the root DirectoryIndex for the domain,
1321                 # $href here would be something like http://gitweb.example.com/
1322                 # Thus, we strip any trailing / from $href, to spare us double
1323                 # slashes in the final URL
1324                 $href =~ s,/$,,;
1325
1326                 # Then add the project name, if present
1327                 $href .= "/".esc_path_info($params{'project'});
1328                 delete $params{'project'};
1329
1330                 # since we destructively absorb parameters, we keep this
1331                 # boolean that remembers if we're handling a snapshot
1332                 my $is_snapshot = $params{'action'} eq 'snapshot';
1333
1334                 # Summary just uses the project path URL, any other action is
1335                 # added to the URL
1336                 if (defined $params{'action'}) {
1337                         $href .= "/".esc_path_info($params{'action'})
1338                                 unless $params{'action'} eq 'summary';
1339                         delete $params{'action'};
1340                 }
1341
1342                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1343                 # stripping nonexistent or useless pieces
1344                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1345                         || $params{'hash_parent'} || $params{'hash'});
1346                 if (defined $params{'hash_base'}) {
1347                         if (defined $params{'hash_parent_base'}) {
1348                                 $href .= esc_path_info($params{'hash_parent_base'});
1349                                 # skip the file_parent if it's the same as the file_name
1350                                 if (defined $params{'file_parent'}) {
1351                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1352                                                 delete $params{'file_parent'};
1353                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1354                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1355                                                 delete $params{'file_parent'};
1356                                         }
1357                                 }
1358                                 $href .= "..";
1359                                 delete $params{'hash_parent'};
1360                                 delete $params{'hash_parent_base'};
1361                         } elsif (defined $params{'hash_parent'}) {
1362                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1363                                 delete $params{'hash_parent'};
1364                         }
1365
1366                         $href .= esc_path_info($params{'hash_base'});
1367                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1368                                 $href .= ":/".esc_path_info($params{'file_name'});
1369                                 delete $params{'file_name'};
1370                         }
1371                         delete $params{'hash'};
1372                         delete $params{'hash_base'};
1373                 } elsif (defined $params{'hash'}) {
1374                         $href .= esc_path_info($params{'hash'});
1375                         delete $params{'hash'};
1376                 }
1377
1378                 # If the action was a snapshot, we can absorb the
1379                 # snapshot_format parameter too
1380                 if ($is_snapshot) {
1381                         my $fmt = $params{'snapshot_format'};
1382                         # snapshot_format should always be defined when href()
1383                         # is called, but just in case some code forgets, we
1384                         # fall back to the default
1385                         $fmt ||= $snapshot_fmts[0];
1386                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1387                         delete $params{'snapshot_format'};
1388                 }
1389         }
1390
1391         # now encode the parameters explicitly
1392         my @result = ();
1393         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1394                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1395                 if (defined $params{$name}) {
1396                         if (ref($params{$name}) eq "ARRAY") {
1397                                 foreach my $par (@{$params{$name}}) {
1398                                         push @result, $symbol . "=" . esc_param($par);
1399                                 }
1400                         } else {
1401                                 push @result, $symbol . "=" . esc_param($params{$name});
1402                         }
1403                 }
1404         }
1405         $href .= "?" . join(';', @result) if scalar @result;
1406
1407         # final transformation: trailing spaces must be escaped (URI-encoded)
1408         $href =~ s/(\s+)$/CGI::escape($1)/e;
1409
1410         if ($params{-anchor}) {
1411                 $href .= "#".esc_param($params{-anchor});
1412         }
1413
1414         return $href;
1415 }
1416
1417
1418 ## ======================================================================
1419 ## validation, quoting/unquoting and escaping
1420
1421 sub validate_action {
1422         my $input = shift || return undef;
1423         return undef unless exists $actions{$input};
1424         return $input;
1425 }
1426
1427 sub validate_project {
1428         my $input = shift || return undef;
1429         if (!validate_pathname($input) ||
1430                 !(-d "$projectroot/$input") ||
1431                 !check_export_ok("$projectroot/$input") ||
1432                 ($strict_export && !project_in_list($input))) {
1433                 return undef;
1434         } else {
1435                 return $input;
1436         }
1437 }
1438
1439 sub validate_pathname {
1440         my $input = shift || return undef;
1441
1442         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1443         # at the beginning, at the end, and between slashes.
1444         # also this catches doubled slashes
1445         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1446                 return undef;
1447         }
1448         # no null characters
1449         if ($input =~ m!\0!) {
1450                 return undef;
1451         }
1452         return $input;
1453 }
1454
1455 sub is_valid_ref_format {
1456         my $input = shift || return undef;
1457
1458         # restrictions on ref name according to git-check-ref-format
1459         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1460                 return undef;
1461         }
1462         return $input;
1463 }
1464
1465 sub validate_refname {
1466         my $input = shift || return undef;
1467
1468         # textual hashes are O.K.
1469         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1470                 return $input;
1471         }
1472         # it must be correct pathname
1473         $input = validate_pathname($input)
1474                 or return undef;
1475         # check git-check-ref-format restrictions
1476         is_valid_ref_format($input)
1477                 or return undef;
1478         return $input;
1479 }
1480
1481 # decode sequences of octets in utf8 into Perl's internal form,
1482 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1483 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1484 sub to_utf8 {
1485         my $str = shift;
1486         return undef unless defined $str;
1487
1488         if (utf8::is_utf8($str) || utf8::decode($str)) {
1489                 return $str;
1490         } else {
1491                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1492         }
1493 }
1494
1495 # quote unsafe chars, but keep the slash, even when it's not
1496 # correct, but quoted slashes look too horrible in bookmarks
1497 sub esc_param {
1498         my $str = shift;
1499         return undef unless defined $str;
1500         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1501         $str =~ s/ /\+/g;
1502         return $str;
1503 }
1504
1505 # the quoting rules for path_info fragment are slightly different
1506 sub esc_path_info {
1507         my $str = shift;
1508         return undef unless defined $str;
1509
1510         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1511         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1512
1513         return $str;
1514 }
1515
1516 # quote unsafe chars in whole URL, so some characters cannot be quoted
1517 sub esc_url {
1518         my $str = shift;
1519         return undef unless defined $str;
1520         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1521         $str =~ s/ /\+/g;
1522         return $str;
1523 }
1524
1525 # quote unsafe characters in HTML attributes
1526 sub esc_attr {
1527
1528         # for XHTML conformance escaping '"' to '&quot;' is not enough
1529         return esc_html(@_);
1530 }
1531
1532 # replace invalid utf8 character with SUBSTITUTION sequence
1533 sub esc_html {
1534         my $str = shift;
1535         my %opts = @_;
1536
1537         return undef unless defined $str;
1538
1539         $str = to_utf8($str);
1540         $str = $cgi->escapeHTML($str);
1541         if ($opts{'-nbsp'}) {
1542                 $str =~ s/ /&nbsp;/g;
1543         }
1544         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1545         return $str;
1546 }
1547
1548 # quote control characters and escape filename to HTML
1549 sub esc_path {
1550         my $str = shift;
1551         my %opts = @_;
1552
1553         return undef unless defined $str;
1554
1555         $str = to_utf8($str);
1556         $str = $cgi->escapeHTML($str);
1557         if ($opts{'-nbsp'}) {
1558                 $str =~ s/ /&nbsp;/g;
1559         }
1560         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1561         return $str;
1562 }
1563
1564 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1565 sub sanitize {
1566         my $str = shift;
1567
1568         return undef unless defined $str;
1569
1570         $str = to_utf8($str);
1571         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1572         return $str;
1573 }
1574
1575 # Make control characters "printable", using character escape codes (CEC)
1576 sub quot_cec {
1577         my $cntrl = shift;
1578         my %opts = @_;
1579         my %es = ( # character escape codes, aka escape sequences
1580                 "\t" => '\t',   # tab            (HT)
1581                 "\n" => '\n',   # line feed      (LF)
1582                 "\r" => '\r',   # carrige return (CR)
1583                 "\f" => '\f',   # form feed      (FF)
1584                 "\b" => '\b',   # backspace      (BS)
1585                 "\a" => '\a',   # alarm (bell)   (BEL)
1586                 "\e" => '\e',   # escape         (ESC)
1587                 "\013" => '\v', # vertical tab   (VT)
1588                 "\000" => '\0', # nul character  (NUL)
1589         );
1590         my $chr = ( (exists $es{$cntrl})
1591                     ? $es{$cntrl}
1592                     : sprintf('\%2x', ord($cntrl)) );
1593         if ($opts{-nohtml}) {
1594                 return $chr;
1595         } else {
1596                 return "<span class=\"cntrl\">$chr</span>";
1597         }
1598 }
1599
1600 # Alternatively use unicode control pictures codepoints,
1601 # Unicode "printable representation" (PR)
1602 sub quot_upr {
1603         my $cntrl = shift;
1604         my %opts = @_;
1605
1606         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1607         if ($opts{-nohtml}) {
1608                 return $chr;
1609         } else {
1610                 return "<span class=\"cntrl\">$chr</span>";
1611         }
1612 }
1613
1614 # git may return quoted and escaped filenames
1615 sub unquote {
1616         my $str = shift;
1617
1618         sub unq {
1619                 my $seq = shift;
1620                 my %es = ( # character escape codes, aka escape sequences
1621                         't' => "\t",   # tab            (HT, TAB)
1622                         'n' => "\n",   # newline        (NL)
1623                         'r' => "\r",   # return         (CR)
1624                         'f' => "\f",   # form feed      (FF)
1625                         'b' => "\b",   # backspace      (BS)
1626                         'a' => "\a",   # alarm (bell)   (BEL)
1627                         'e' => "\e",   # escape         (ESC)
1628                         'v' => "\013", # vertical tab   (VT)
1629                 );
1630
1631                 if ($seq =~ m/^[0-7]{1,3}$/) {
1632                         # octal char sequence
1633                         return chr(oct($seq));
1634                 } elsif (exists $es{$seq}) {
1635                         # C escape sequence, aka character escape code
1636                         return $es{$seq};
1637                 }
1638                 # quoted ordinary character
1639                 return $seq;
1640         }
1641
1642         if ($str =~ m/^"(.*)"$/) {
1643                 # needs unquoting
1644                 $str = $1;
1645                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1646         }
1647         return $str;
1648 }
1649
1650 # escape tabs (convert tabs to spaces)
1651 sub untabify {
1652         my $line = shift;
1653
1654         while ((my $pos = index($line, "\t")) != -1) {
1655                 if (my $count = (8 - ($pos % 8))) {
1656                         my $spaces = ' ' x $count;
1657                         $line =~ s/\t/$spaces/;
1658                 }
1659         }
1660
1661         return $line;
1662 }
1663
1664 sub project_in_list {
1665         my $project = shift;
1666         my @list = git_get_projects_list();
1667         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1668 }
1669
1670 ## ----------------------------------------------------------------------
1671 ## HTML aware string manipulation
1672
1673 # Try to chop given string on a word boundary between position
1674 # $len and $len+$add_len. If there is no word boundary there,
1675 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1676 # (marking chopped part) would be longer than given string.
1677 sub chop_str {
1678         my $str = shift;
1679         my $len = shift;
1680         my $add_len = shift || 10;
1681         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1682
1683         # Make sure perl knows it is utf8 encoded so we don't
1684         # cut in the middle of a utf8 multibyte char.
1685         $str = to_utf8($str);
1686
1687         # allow only $len chars, but don't cut a word if it would fit in $add_len
1688         # if it doesn't fit, cut it if it's still longer than the dots we would add
1689         # remove chopped character entities entirely
1690
1691         # when chopping in the middle, distribute $len into left and right part
1692         # return early if chopping wouldn't make string shorter
1693         if ($where eq 'center') {
1694                 return $str if ($len + 5 >= length($str)); # filler is length 5
1695                 $len = int($len/2);
1696         } else {
1697                 return $str if ($len + 4 >= length($str)); # filler is length 4
1698         }
1699
1700         # regexps: ending and beginning with word part up to $add_len
1701         my $endre = qr/.{$len}\w{0,$add_len}/;
1702         my $begre = qr/\w{0,$add_len}.{$len}/;
1703
1704         if ($where eq 'left') {
1705                 $str =~ m/^(.*?)($begre)$/;
1706                 my ($lead, $body) = ($1, $2);
1707                 if (length($lead) > 4) {
1708                         $lead = " ...";
1709                 }
1710                 return "$lead$body";
1711
1712         } elsif ($where eq 'center') {
1713                 $str =~ m/^($endre)(.*)$/;
1714                 my ($left, $str)  = ($1, $2);
1715                 $str =~ m/^(.*?)($begre)$/;
1716                 my ($mid, $right) = ($1, $2);
1717                 if (length($mid) > 5) {
1718                         $mid = " ... ";
1719                 }
1720                 return "$left$mid$right";
1721
1722         } else {
1723                 $str =~ m/^($endre)(.*)$/;
1724                 my $body = $1;
1725                 my $tail = $2;
1726                 if (length($tail) > 4) {
1727                         $tail = "... ";
1728                 }
1729                 return "$body$tail";
1730         }
1731 }
1732
1733 # takes the same arguments as chop_str, but also wraps a <span> around the
1734 # result with a title attribute if it does get chopped. Additionally, the
1735 # string is HTML-escaped.
1736 sub chop_and_escape_str {
1737         my ($str) = @_;
1738
1739         my $chopped = chop_str(@_);
1740         $str = to_utf8($str);
1741         if ($chopped eq $str) {
1742                 return esc_html($chopped);
1743         } else {
1744                 $str =~ s/[[:cntrl:]]/?/g;
1745                 return $cgi->span({-title=>$str}, esc_html($chopped));
1746         }
1747 }
1748
1749 # Highlight selected fragments of string, using given CSS class,
1750 # and escape HTML.  It is assumed that fragments do not overlap.
1751 # Regions are passed as list of pairs (array references).
1752 #
1753 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1754 # '<span class="mark">foo</span>bar'
1755 sub esc_html_hl_regions {
1756         my ($str, $css_class, @sel) = @_;
1757         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1758         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1759         return esc_html($str, %opts) unless @sel;
1760
1761         my $out = '';
1762         my $pos = 0;
1763
1764         for my $s (@sel) {
1765                 my ($begin, $end) = @$s;
1766
1767                 # Don't create empty <span> elements.
1768                 next if $end <= $begin;
1769
1770                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1771                                        %opts);
1772
1773                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1774                         if ($begin - $pos > 0);
1775                 $out .= $cgi->span({-class => $css_class}, $escaped);
1776
1777                 $pos = $end;
1778         }
1779         $out .= esc_html(substr($str, $pos), %opts)
1780                 if ($pos < length($str));
1781
1782         return $out;
1783 }
1784
1785 # return positions of beginning and end of each match
1786 sub matchpos_list {
1787         my ($str, $regexp) = @_;
1788         return unless (defined $str && defined $regexp);
1789
1790         my @matches;
1791         while ($str =~ /$regexp/g) {
1792                 push @matches, [$-[0], $+[0]];
1793         }
1794         return @matches;
1795 }
1796
1797 # highlight match (if any), and escape HTML
1798 sub esc_html_match_hl {
1799         my ($str, $regexp) = @_;
1800         return esc_html($str) unless defined $regexp;
1801
1802         my @matches = matchpos_list($str, $regexp);
1803         return esc_html($str) unless @matches;
1804
1805         return esc_html_hl_regions($str, 'match', @matches);
1806 }
1807
1808
1809 # highlight match (if any) of shortened string, and escape HTML
1810 sub esc_html_match_hl_chopped {
1811         my ($str, $chopped, $regexp) = @_;
1812         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1813
1814         my @matches = matchpos_list($str, $regexp);
1815         return esc_html($chopped) unless @matches;
1816
1817         # filter matches so that we mark chopped string
1818         my $tail = "... "; # see chop_str
1819         unless ($chopped =~ s/\Q$tail\E$//) {
1820                 $tail = '';
1821         }
1822         my $chop_len = length($chopped);
1823         my $tail_len = length($tail);
1824         my @filtered;
1825
1826         for my $m (@matches) {
1827                 if ($m->[0] > $chop_len) {
1828                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1829                         last;
1830                 } elsif ($m->[1] > $chop_len) {
1831                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1832                         last;
1833                 }
1834                 push @filtered, $m;
1835         }
1836
1837         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1838 }
1839
1840 ## ----------------------------------------------------------------------
1841 ## functions returning short strings
1842
1843 # CSS class for given age value (in seconds)
1844 sub age_class {
1845         my $age = shift;
1846
1847         if (!defined $age) {
1848                 return "noage";
1849         } elsif ($age < 60*60*2) {
1850                 return "age0";
1851         } elsif ($age < 60*60*24*2) {
1852                 return "age1";
1853         } else {
1854                 return "age2";
1855         }
1856 }
1857
1858 # convert age in seconds to "nn units ago" string
1859 sub age_string {
1860         my $age = shift;
1861         my $age_str;
1862
1863         if ($age > 60*60*24*365*2) {
1864                 $age_str = (int $age/60/60/24/365);
1865                 $age_str .= " years ago";
1866         } elsif ($age > 60*60*24*(365/12)*2) {
1867                 $age_str = int $age/60/60/24/(365/12);
1868                 $age_str .= " months ago";
1869         } elsif ($age > 60*60*24*7*2) {
1870                 $age_str = int $age/60/60/24/7;
1871                 $age_str .= " weeks ago";
1872         } elsif ($age > 60*60*24*2) {
1873                 $age_str = int $age/60/60/24;
1874                 $age_str .= " days ago";
1875         } elsif ($age > 60*60*2) {
1876                 $age_str = int $age/60/60;
1877                 $age_str .= " hours ago";
1878         } elsif ($age > 60*2) {
1879                 $age_str = int $age/60;
1880                 $age_str .= " min ago";
1881         } elsif ($age > 2) {
1882                 $age_str = int $age;
1883                 $age_str .= " sec ago";
1884         } else {
1885                 $age_str .= " right now";
1886         }
1887         return $age_str;
1888 }
1889
1890 use constant {
1891         S_IFINVALID => 0030000,
1892         S_IFGITLINK => 0160000,
1893 };
1894
1895 # submodule/subproject, a commit object reference
1896 sub S_ISGITLINK {
1897         my $mode = shift;
1898
1899         return (($mode & S_IFMT) == S_IFGITLINK)
1900 }
1901
1902 # convert file mode in octal to symbolic file mode string
1903 sub mode_str {
1904         my $mode = oct shift;
1905
1906         if (S_ISGITLINK($mode)) {
1907                 return 'm---------';
1908         } elsif (S_ISDIR($mode & S_IFMT)) {
1909                 return 'drwxr-xr-x';
1910         } elsif (S_ISLNK($mode)) {
1911                 return 'lrwxrwxrwx';
1912         } elsif (S_ISREG($mode)) {
1913                 # git cares only about the executable bit
1914                 if ($mode & S_IXUSR) {
1915                         return '-rwxr-xr-x';
1916                 } else {
1917                         return '-rw-r--r--';
1918                 };
1919         } else {
1920                 return '----------';
1921         }
1922 }
1923
1924 # convert file mode in octal to file type string
1925 sub file_type {
1926         my $mode = shift;
1927
1928         if ($mode !~ m/^[0-7]+$/) {
1929                 return $mode;
1930         } else {
1931                 $mode = oct $mode;
1932         }
1933
1934         if (S_ISGITLINK($mode)) {
1935                 return "submodule";
1936         } elsif (S_ISDIR($mode & S_IFMT)) {
1937                 return "directory";
1938         } elsif (S_ISLNK($mode)) {
1939                 return "symlink";
1940         } elsif (S_ISREG($mode)) {
1941                 return "file";
1942         } else {
1943                 return "unknown";
1944         }
1945 }
1946
1947 # convert file mode in octal to file type description string
1948 sub file_type_long {
1949         my $mode = shift;
1950
1951         if ($mode !~ m/^[0-7]+$/) {
1952                 return $mode;
1953         } else {
1954                 $mode = oct $mode;
1955         }
1956
1957         if (S_ISGITLINK($mode)) {
1958                 return "submodule";
1959         } elsif (S_ISDIR($mode & S_IFMT)) {
1960                 return "directory";
1961         } elsif (S_ISLNK($mode)) {
1962                 return "symlink";
1963         } elsif (S_ISREG($mode)) {
1964                 if ($mode & S_IXUSR) {
1965                         return "executable";
1966                 } else {
1967                         return "file";
1968                 };
1969         } else {
1970                 return "unknown";
1971         }
1972 }
1973
1974
1975 ## ----------------------------------------------------------------------
1976 ## functions returning short HTML fragments, or transforming HTML fragments
1977 ## which don't belong to other sections
1978
1979 # format line of commit message.
1980 sub format_log_line_html {
1981         my $line = shift;
1982
1983         $line = esc_html($line, -nbsp=>1);
1984         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1985                 $cgi->a({-href => href(action=>"object", hash=>$1),
1986                                         -class => "text"}, $1);
1987         }eg;
1988
1989         return $line;
1990 }
1991
1992 # format marker of refs pointing to given object
1993
1994 # the destination action is chosen based on object type and current context:
1995 # - for annotated tags, we choose the tag view unless it's the current view
1996 #   already, in which case we go to shortlog view
1997 # - for other refs, we keep the current view if we're in history, shortlog or
1998 #   log view, and select shortlog otherwise
1999 sub format_ref_marker {
2000         my ($refs, $id) = @_;
2001         my $markers = '';
2002
2003         if (defined $refs->{$id}) {
2004                 foreach my $ref (@{$refs->{$id}}) {
2005                         # this code exploits the fact that non-lightweight tags are the
2006                         # only indirect objects, and that they are the only objects for which
2007                         # we want to use tag instead of shortlog as action
2008                         my ($type, $name) = qw();
2009                         my $indirect = ($ref =~ s/\^\{\}$//);
2010                         # e.g. tags/v2.6.11 or heads/next
2011                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2012                                 $type = $1;
2013                                 $name = $2;
2014                         } else {
2015                                 $type = "ref";
2016                                 $name = $ref;
2017                         }
2018
2019                         my $class = $type;
2020                         $class .= " indirect" if $indirect;
2021
2022                         my $dest_action = "shortlog";
2023
2024                         if ($indirect) {
2025                                 $dest_action = "tag" unless $action eq "tag";
2026                         } elsif ($action =~ /^(history|(short)?log)$/) {
2027                                 $dest_action = $action;
2028                         }
2029
2030                         my $dest = "";
2031                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2032                         $dest .= $ref;
2033
2034                         my $link = $cgi->a({
2035                                 -href => href(
2036                                         action=>$dest_action,
2037                                         hash=>$dest
2038                                 )}, $name);
2039
2040                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2041                                 $link . "</span>";
2042                 }
2043         }
2044
2045         if ($markers) {
2046                 return ' <span class="refs">'. $markers . '</span>';
2047         } else {
2048                 return "";
2049         }
2050 }
2051
2052 # format, perhaps shortened and with markers, title line
2053 sub format_subject_html {
2054         my ($long, $short, $href, $extra) = @_;
2055         $extra = '' unless defined($extra);
2056
2057         if (length($short) < length($long)) {
2058                 $long =~ s/[[:cntrl:]]/?/g;
2059                 return $cgi->a({-href => $href, -class => "list subject",
2060                                 -title => to_utf8($long)},
2061                        esc_html($short)) . $extra;
2062         } else {
2063                 return $cgi->a({-href => $href, -class => "list subject"},
2064                        esc_html($long)) . $extra;
2065         }
2066 }
2067
2068 # Rather than recomputing the url for an email multiple times, we cache it
2069 # after the first hit. This gives a visible benefit in views where the avatar
2070 # for the same email is used repeatedly (e.g. shortlog).
2071 # The cache is shared by all avatar engines (currently gravatar only), which
2072 # are free to use it as preferred. Since only one avatar engine is used for any
2073 # given page, there's no risk for cache conflicts.
2074 our %avatar_cache = ();
2075
2076 # Compute the picon url for a given email, by using the picon search service over at
2077 # http://www.cs.indiana.edu/picons/search.html
2078 sub picon_url {
2079         my $email = lc shift;
2080         if (!$avatar_cache{$email}) {
2081                 my ($user, $domain) = split('@', $email);
2082                 $avatar_cache{$email} =
2083                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2084                         "$domain/$user/" .
2085                         "users+domains+unknown/up/single";
2086         }
2087         return $avatar_cache{$email};
2088 }
2089
2090 # Compute the gravatar url for a given email, if it's not in the cache already.
2091 # Gravatar stores only the part of the URL before the size, since that's the
2092 # one computationally more expensive. This also allows reuse of the cache for
2093 # different sizes (for this particular engine).
2094 sub gravatar_url {
2095         my $email = lc shift;
2096         my $size = shift;
2097         $avatar_cache{$email} ||=
2098                 "//www.gravatar.com/avatar/" .
2099                         Digest::MD5::md5_hex($email) . "?s=";
2100         return $avatar_cache{$email} . $size;
2101 }
2102
2103 # Insert an avatar for the given $email at the given $size if the feature
2104 # is enabled.
2105 sub git_get_avatar {
2106         my ($email, %opts) = @_;
2107         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2108         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2109         $opts{-size} ||= 'default';
2110         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2111         my $url = "";
2112         if ($git_avatar eq 'gravatar') {
2113                 $url = gravatar_url($email, $size);
2114         } elsif ($git_avatar eq 'picon') {
2115                 $url = picon_url($email);
2116         }
2117         # Other providers can be added by extending the if chain, defining $url
2118         # as needed. If no variant puts something in $url, we assume avatars
2119         # are completely disabled/unavailable.
2120         if ($url) {
2121                 return $pre_white .
2122                        "<img width=\"$size\" " .
2123                             "class=\"avatar\" " .
2124                             "src=\"".esc_url($url)."\" " .
2125                             "alt=\"\" " .
2126                        "/>" . $post_white;
2127         } else {
2128                 return "";
2129         }
2130 }
2131
2132 sub format_search_author {
2133         my ($author, $searchtype, $displaytext) = @_;
2134         my $have_search = gitweb_check_feature('search');
2135
2136         if ($have_search) {
2137                 my $performed = "";
2138                 if ($searchtype eq 'author') {
2139                         $performed = "authored";
2140                 } elsif ($searchtype eq 'committer') {
2141                         $performed = "committed";
2142                 }
2143
2144                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2145                                 searchtext=>$author,
2146                                 searchtype=>$searchtype), class=>"list",
2147                                 title=>"Search for commits $performed by $author"},
2148                                 $displaytext);
2149
2150         } else {
2151                 return $displaytext;
2152         }
2153 }
2154
2155 # format the author name of the given commit with the given tag
2156 # the author name is chopped and escaped according to the other
2157 # optional parameters (see chop_str).
2158 sub format_author_html {
2159         my $tag = shift;
2160         my $co = shift;
2161         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2162         return "<$tag class=\"author\">" .
2163                format_search_author($co->{'author_name'}, "author",
2164                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2165                        $author) .
2166                "</$tag>";
2167 }
2168
2169 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2170 sub format_git_diff_header_line {
2171         my $line = shift;
2172         my $diffinfo = shift;
2173         my ($from, $to) = @_;
2174
2175         if ($diffinfo->{'nparents'}) {
2176                 # combined diff
2177                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2178                 if ($to->{'href'}) {
2179                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2180                                          esc_path($to->{'file'}));
2181                 } else { # file was deleted (no href)
2182                         $line .= esc_path($to->{'file'});
2183                 }
2184         } else {
2185                 # "ordinary" diff
2186                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2187                 if ($from->{'href'}) {
2188                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2189                                          'a/' . esc_path($from->{'file'}));
2190                 } else { # file was added (no href)
2191                         $line .= 'a/' . esc_path($from->{'file'});
2192                 }
2193                 $line .= ' ';
2194                 if ($to->{'href'}) {
2195                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2196                                          'b/' . esc_path($to->{'file'}));
2197                 } else { # file was deleted
2198                         $line .= 'b/' . esc_path($to->{'file'});
2199                 }
2200         }
2201
2202         return "<div class=\"diff header\">$line</div>\n";
2203 }
2204
2205 # format extended diff header line, before patch itself
2206 sub format_extended_diff_header_line {
2207         my $line = shift;
2208         my $diffinfo = shift;
2209         my ($from, $to) = @_;
2210
2211         # match <path>
2212         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2213                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2214                                        esc_path($from->{'file'}));
2215         }
2216         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2217                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2218                                  esc_path($to->{'file'}));
2219         }
2220         # match single <mode>
2221         if ($line =~ m/\s(\d{6})$/) {
2222                 $line .= '<span class="info"> (' .
2223                          file_type_long($1) .
2224                          ')</span>';
2225         }
2226         # match <hash>
2227         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2228                 # can match only for combined diff
2229                 $line = 'index ';
2230                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2231                         if ($from->{'href'}[$i]) {
2232                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2233                                                   -class=>"hash"},
2234                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2235                         } else {
2236                                 $line .= '0' x 7;
2237                         }
2238                         # separator
2239                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2240                 }
2241                 $line .= '..';
2242                 if ($to->{'href'}) {
2243                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2244                                          substr($diffinfo->{'to_id'},0,7));
2245                 } else {
2246                         $line .= '0' x 7;
2247                 }
2248
2249         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2250                 # can match only for ordinary diff
2251                 my ($from_link, $to_link);
2252                 if ($from->{'href'}) {
2253                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2254                                              substr($diffinfo->{'from_id'},0,7));
2255                 } else {
2256                         $from_link = '0' x 7;
2257                 }
2258                 if ($to->{'href'}) {
2259                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2260                                            substr($diffinfo->{'to_id'},0,7));
2261                 } else {
2262                         $to_link = '0' x 7;
2263                 }
2264                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2265                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2266         }
2267
2268         return $line . "<br/>\n";
2269 }
2270
2271 # format from-file/to-file diff header
2272 sub format_diff_from_to_header {
2273         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2274         my $line;
2275         my $result = '';
2276
2277         $line = $from_line;
2278         #assert($line =~ m/^---/) if DEBUG;
2279         # no extra formatting for "^--- /dev/null"
2280         if (! $diffinfo->{'nparents'}) {
2281                 # ordinary (single parent) diff
2282                 if ($line =~ m!^--- "?a/!) {
2283                         if ($from->{'href'}) {
2284                                 $line = '--- a/' .
2285                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2286                                                 esc_path($from->{'file'}));
2287                         } else {
2288                                 $line = '--- a/' .
2289                                         esc_path($from->{'file'});
2290                         }
2291                 }
2292                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2293
2294         } else {
2295                 # combined diff (merge commit)
2296                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2297                         if ($from->{'href'}[$i]) {
2298                                 $line = '--- ' .
2299                                         $cgi->a({-href=>href(action=>"blobdiff",
2300                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2301                                                              hash_parent_base=>$parents[$i],
2302                                                              file_parent=>$from->{'file'}[$i],
2303                                                              hash=>$diffinfo->{'to_id'},
2304                                                              hash_base=>$hash,
2305                                                              file_name=>$to->{'file'}),
2306                                                  -class=>"path",
2307                                                  -title=>"diff" . ($i+1)},
2308                                                 $i+1) .
2309                                         '/' .
2310                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2311                                                 esc_path($from->{'file'}[$i]));
2312                         } else {
2313                                 $line = '--- /dev/null';
2314                         }
2315                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2316                 }
2317         }
2318
2319         $line = $to_line;
2320         #assert($line =~ m/^\+\+\+/) if DEBUG;
2321         # no extra formatting for "^+++ /dev/null"
2322         if ($line =~ m!^\+\+\+ "?b/!) {
2323                 if ($to->{'href'}) {
2324                         $line = '+++ b/' .
2325                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2326                                         esc_path($to->{'file'}));
2327                 } else {
2328                         $line = '+++ b/' .
2329                                 esc_path($to->{'file'});
2330                 }
2331         }
2332         $result .= qq!<div class="diff to_file">$line</div>\n!;
2333
2334         return $result;
2335 }
2336
2337 # create note for patch simplified by combined diff
2338 sub format_diff_cc_simplified {
2339         my ($diffinfo, @parents) = @_;
2340         my $result = '';
2341
2342         $result .= "<div class=\"diff header\">" .
2343                    "diff --cc ";
2344         if (!is_deleted($diffinfo)) {
2345                 $result .= $cgi->a({-href => href(action=>"blob",
2346                                                   hash_base=>$hash,
2347                                                   hash=>$diffinfo->{'to_id'},
2348                                                   file_name=>$diffinfo->{'to_file'}),
2349                                     -class => "path"},
2350                                    esc_path($diffinfo->{'to_file'}));
2351         } else {
2352                 $result .= esc_path($diffinfo->{'to_file'});
2353         }
2354         $result .= "</div>\n" . # class="diff header"
2355                    "<div class=\"diff nodifferences\">" .
2356                    "Simple merge" .
2357                    "</div>\n"; # class="diff nodifferences"
2358
2359         return $result;
2360 }
2361
2362 sub diff_line_class {
2363         my ($line, $from, $to) = @_;
2364
2365         # ordinary diff
2366         my $num_sign = 1;
2367         # combined diff
2368         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2369                 $num_sign = scalar @{$from->{'href'}};
2370         }
2371
2372         my @diff_line_classifier = (
2373                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2374                 { regexp => qr/^\\/,               class => "incomplete"  },
2375                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2376                 # classifier for context must come before classifier add/rem,
2377                 # or we would have to use more complicated regexp, for example
2378                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2379                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2380                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2381         );
2382         for my $clsfy (@diff_line_classifier) {
2383                 return $clsfy->{'class'}
2384                         if ($line =~ $clsfy->{'regexp'});
2385         }
2386
2387         # fallback
2388         return "";
2389 }
2390
2391 # assumes that $from and $to are defined and correctly filled,
2392 # and that $line holds a line of chunk header for unified diff
2393 sub format_unidiff_chunk_header {
2394         my ($line, $from, $to) = @_;
2395
2396         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2397                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2398
2399         $from_lines = 0 unless defined $from_lines;
2400         $to_lines   = 0 unless defined $to_lines;
2401
2402         if ($from->{'href'}) {
2403                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2404                                      -class=>"list"}, $from_text);
2405         }
2406         if ($to->{'href'}) {
2407                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2408                                      -class=>"list"}, $to_text);
2409         }
2410         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2411                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2412         return $line;
2413 }
2414
2415 # assumes that $from and $to are defined and correctly filled,
2416 # and that $line holds a line of chunk header for combined diff
2417 sub format_cc_diff_chunk_header {
2418         my ($line, $from, $to) = @_;
2419
2420         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2421         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2422
2423         @from_text = split(' ', $ranges);
2424         for (my $i = 0; $i < @from_text; ++$i) {
2425                 ($from_start[$i], $from_nlines[$i]) =
2426                         (split(',', substr($from_text[$i], 1)), 0);
2427         }
2428
2429         $to_text   = pop @from_text;
2430         $to_start  = pop @from_start;
2431         $to_nlines = pop @from_nlines;
2432
2433         $line = "<span class=\"chunk_info\">$prefix ";
2434         for (my $i = 0; $i < @from_text; ++$i) {
2435                 if ($from->{'href'}[$i]) {
2436                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2437                                           -class=>"list"}, $from_text[$i]);
2438                 } else {
2439                         $line .= $from_text[$i];
2440                 }
2441                 $line .= " ";
2442         }
2443         if ($to->{'href'}) {
2444                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2445                                   -class=>"list"}, $to_text);
2446         } else {
2447                 $line .= $to_text;
2448         }
2449         $line .= " $prefix</span>" .
2450                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2451         return $line;
2452 }
2453
2454 # process patch (diff) line (not to be used for diff headers),
2455 # returning HTML-formatted (but not wrapped) line.
2456 # If the line is passed as a reference, it is treated as HTML and not
2457 # esc_html()'ed.
2458 sub format_diff_line {
2459         my ($line, $diff_class, $from, $to) = @_;
2460
2461         if (ref($line)) {
2462                 $line = $$line;
2463         } else {
2464                 chomp $line;
2465                 $line = untabify($line);
2466
2467                 if ($from && $to && $line =~ m/^\@{2} /) {
2468                         $line = format_unidiff_chunk_header($line, $from, $to);
2469                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2470                         $line = format_cc_diff_chunk_header($line, $from, $to);
2471                 } else {
2472                         $line = esc_html($line, -nbsp=>1);
2473                 }
2474         }
2475
2476         my $diff_classes = "diff";
2477         $diff_classes .= " $diff_class" if ($diff_class);
2478         $line = "<div class=\"$diff_classes\">$line</div>\n";
2479
2480         return $line;
2481 }
2482
2483 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2484 # linked.  Pass the hash of the tree/commit to snapshot.
2485 sub format_snapshot_links {
2486         my ($hash) = @_;
2487         my $num_fmts = @snapshot_fmts;
2488         if ($num_fmts > 1) {
2489                 # A parenthesized list of links bearing format names.
2490                 # e.g. "snapshot (_tar.gz_ _zip_)"
2491                 return "snapshot (" . join(' ', map
2492                         $cgi->a({
2493                                 -href => href(
2494                                         action=>"snapshot",
2495                                         hash=>$hash,
2496                                         snapshot_format=>$_
2497                                 )
2498                         }, $known_snapshot_formats{$_}{'display'})
2499                 , @snapshot_fmts) . ")";
2500         } elsif ($num_fmts == 1) {
2501                 # A single "snapshot" link whose tooltip bears the format name.
2502                 # i.e. "_snapshot_"
2503                 my ($fmt) = @snapshot_fmts;
2504                 return
2505                         $cgi->a({
2506                                 -href => href(
2507                                         action=>"snapshot",
2508                                         hash=>$hash,
2509                                         snapshot_format=>$fmt
2510                                 ),
2511                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2512                         }, "snapshot");
2513         } else { # $num_fmts == 0
2514                 return undef;
2515         }
2516 }
2517
2518 ## ......................................................................
2519 ## functions returning values to be passed, perhaps after some
2520 ## transformation, to other functions; e.g. returning arguments to href()
2521
2522 # returns hash to be passed to href to generate gitweb URL
2523 # in -title key it returns description of link
2524 sub get_feed_info {
2525         my $format = shift || 'Atom';
2526         my %res = (action => lc($format));
2527
2528         # feed links are possible only for project views
2529         return unless (defined $project);
2530         # some views should link to OPML, or to generic project feed,
2531         # or don't have specific feed yet (so they should use generic)
2532         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2533
2534         my $branch;
2535         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2536         # from tag links; this also makes possible to detect branch links
2537         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2538             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2539                 $branch = $1;
2540         }
2541         # find log type for feed description (title)
2542         my $type = 'log';
2543         if (defined $file_name) {
2544                 $type  = "history of $file_name";
2545                 $type .= "/" if ($action eq 'tree');
2546                 $type .= " on '$branch'" if (defined $branch);
2547         } else {
2548                 $type = "log of $branch" if (defined $branch);
2549         }
2550
2551         $res{-title} = $type;
2552         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2553         $res{'file_name'} = $file_name;
2554
2555         return %res;
2556 }
2557
2558 ## ----------------------------------------------------------------------
2559 ## git utility subroutines, invoking git commands
2560
2561 # returns path to the core git executable and the --git-dir parameter as list
2562 sub git_cmd {
2563         $number_of_git_cmds++;
2564         return $GIT, '--git-dir='.$git_dir;
2565 }
2566
2567 # quote the given arguments for passing them to the shell
2568 # quote_command("command", "arg 1", "arg with ' and ! characters")
2569 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2570 # Try to avoid using this function wherever possible.
2571 sub quote_command {
2572         return join(' ',
2573                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2574 }
2575
2576 # get HEAD ref of given project as hash
2577 sub git_get_head_hash {
2578         return git_get_full_hash(shift, 'HEAD');
2579 }
2580
2581 sub git_get_full_hash {
2582         return git_get_hash(@_);
2583 }
2584
2585 sub git_get_short_hash {
2586         return git_get_hash(@_, '--short=7');
2587 }
2588
2589 sub git_get_hash {
2590         my ($project, $hash, @options) = @_;
2591         my $o_git_dir = $git_dir;
2592         my $retval = undef;
2593         $git_dir = "$projectroot/$project";
2594         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2595             '--verify', '-q', @options, $hash) {
2596                 $retval = <$fd>;
2597                 chomp $retval if defined $retval;
2598                 close $fd;
2599         }
2600         if (defined $o_git_dir) {
2601                 $git_dir = $o_git_dir;
2602         }
2603         return $retval;
2604 }
2605
2606 # get type of given object
2607 sub git_get_type {
2608         my $hash = shift;
2609
2610         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2611         my $type = <$fd>;
2612         close $fd or return;
2613         chomp $type;
2614         return $type;
2615 }
2616
2617 # repository configuration
2618 our $config_file = '';
2619 our %config;
2620
2621 # store multiple values for single key as anonymous array reference
2622 # single values stored directly in the hash, not as [ <value> ]
2623 sub hash_set_multi {
2624         my ($hash, $key, $value) = @_;
2625
2626         if (!exists $hash->{$key}) {
2627                 $hash->{$key} = $value;
2628         } elsif (!ref $hash->{$key}) {
2629                 $hash->{$key} = [ $hash->{$key}, $value ];
2630         } else {
2631                 push @{$hash->{$key}}, $value;
2632         }
2633 }
2634
2635 # return hash of git project configuration
2636 # optionally limited to some section, e.g. 'gitweb'
2637 sub git_parse_project_config {
2638         my $section_regexp = shift;
2639         my %config;
2640
2641         local $/ = "\0";
2642
2643         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2644                 or return;
2645
2646         while (my $keyval = <$fh>) {
2647                 chomp $keyval;
2648                 my ($key, $value) = split(/\n/, $keyval, 2);
2649
2650                 hash_set_multi(\%config, $key, $value)
2651                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2652         }
2653         close $fh;
2654
2655         return %config;
2656 }
2657
2658 # convert config value to boolean: 'true' or 'false'
2659 # no value, number > 0, 'true' and 'yes' values are true
2660 # rest of values are treated as false (never as error)
2661 sub config_to_bool {
2662         my $val = shift;
2663
2664         return 1 if !defined $val;             # section.key
2665
2666         # strip leading and trailing whitespace
2667         $val =~ s/^\s+//;
2668         $val =~ s/\s+$//;
2669
2670         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2671                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2672 }
2673
2674 # convert config value to simple decimal number
2675 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2676 # to be multiplied by 1024, 1048576, or 1073741824
2677 sub config_to_int {
2678         my $val = shift;
2679
2680         # strip leading and trailing whitespace
2681         $val =~ s/^\s+//;
2682         $val =~ s/\s+$//;
2683
2684         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2685                 $unit = lc($unit);
2686                 # unknown unit is treated as 1
2687                 return $num * ($unit eq 'g' ? 1073741824 :
2688                                $unit eq 'm' ?    1048576 :
2689                                $unit eq 'k' ?       1024 : 1);
2690         }
2691         return $val;
2692 }
2693
2694 # convert config value to array reference, if needed
2695 sub config_to_multi {
2696         my $val = shift;
2697
2698         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2699 }
2700
2701 sub git_get_project_config {
2702         my ($key, $type) = @_;
2703
2704         return unless defined $git_dir;
2705
2706         # key sanity check
2707         return unless ($key);
2708         # only subsection, if exists, is case sensitive,
2709         # and not lowercased by 'git config -z -l'
2710         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2711                 $lo =~ s/_//g;
2712                 $key = join(".", lc($hi), $mi, lc($lo));
2713                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2714         } else {
2715                 $key = lc($key);
2716                 $key =~ s/_//g;
2717                 return if ($key =~ /\W/);
2718         }
2719         $key =~ s/^gitweb\.//;
2720
2721         # type sanity check
2722         if (defined $type) {
2723                 $type =~ s/^--//;
2724                 $type = undef
2725                         unless ($type eq 'bool' || $type eq 'int');
2726         }
2727
2728         # get config
2729         if (!defined $config_file ||
2730             $config_file ne "$git_dir/config") {
2731                 %config = git_parse_project_config('gitweb');
2732                 $config_file = "$git_dir/config";
2733         }
2734
2735         # check if config variable (key) exists
2736         return unless exists $config{"gitweb.$key"};
2737
2738         # ensure given type
2739         if (!defined $type) {
2740                 return $config{"gitweb.$key"};
2741         } elsif ($type eq 'bool') {
2742                 # backward compatibility: 'git config --bool' returns true/false
2743                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2744         } elsif ($type eq 'int') {
2745                 return config_to_int($config{"gitweb.$key"});
2746         }
2747         return $config{"gitweb.$key"};
2748 }
2749
2750 # get hash of given path at given ref
2751 sub git_get_hash_by_path {
2752         my $base = shift;
2753         my $path = shift || return undef;
2754         my $type = shift;
2755
2756         $path =~ s,/+$,,;
2757
2758         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2759                 or die_error(500, "Open git-ls-tree failed");
2760         my $line = <$fd>;
2761         close $fd or return undef;
2762
2763         if (!defined $line) {
2764                 # there is no tree or hash given by $path at $base
2765                 return undef;
2766         }
2767
2768         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2769         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2770         if (defined $type && $type ne $2) {
2771                 # type doesn't match
2772                 return undef;
2773         }
2774         return $3;
2775 }
2776
2777 # get path of entry with given hash at given tree-ish (ref)
2778 # used to get 'from' filename for combined diff (merge commit) for renames
2779 sub git_get_path_by_hash {
2780         my $base = shift || return;
2781         my $hash = shift || return;
2782
2783         local $/ = "\0";
2784
2785         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2786                 or return undef;
2787         while (my $line = <$fd>) {
2788                 chomp $line;
2789
2790                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2791                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2792                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2793                         close $fd;
2794                         return $1;
2795                 }
2796         }
2797         close $fd;
2798         return undef;
2799 }
2800
2801 ## ......................................................................
2802 ## git utility functions, directly accessing git repository
2803
2804 # get the value of config variable either from file named as the variable
2805 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2806 # configuration variable in the repository config file.
2807 sub git_get_file_or_project_config {
2808         my ($path, $name) = @_;
2809
2810         $git_dir = "$projectroot/$path";
2811         open my $fd, '<', "$git_dir/$name"
2812                 or return git_get_project_config($name);
2813         my $conf = <$fd>;
2814         close $fd;
2815         if (defined $conf) {
2816                 chomp $conf;
2817         }
2818         return $conf;
2819 }
2820
2821 sub git_get_project_description {
2822         my $path = shift;
2823         return git_get_file_or_project_config($path, 'description');
2824 }
2825
2826 sub git_get_project_category {
2827         my $path = shift;
2828         return git_get_file_or_project_config($path, 'category');
2829 }
2830
2831
2832 # supported formats:
2833 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2834 #   - if its contents is a number, use it as tag weight,
2835 #   - otherwise add a tag with weight 1
2836 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2837 #   the same value multiple times increases tag weight
2838 # * `gitweb.ctag' multi-valued repo config variable
2839 sub git_get_project_ctags {
2840         my $project = shift;
2841         my $ctags = {};
2842
2843         $git_dir = "$projectroot/$project";
2844         if (opendir my $dh, "$git_dir/ctags") {
2845                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2846                 foreach my $tagfile (@files) {
2847                         open my $ct, '<', $tagfile
2848                                 or next;
2849                         my $val = <$ct>;
2850                         chomp $val if $val;
2851                         close $ct;
2852
2853                         (my $ctag = $tagfile) =~ s#.*/##;
2854                         if ($val =~ /^\d+$/) {
2855                                 $ctags->{$ctag} = $val;
2856                         } else {
2857                                 $ctags->{$ctag} = 1;
2858                         }
2859                 }
2860                 closedir $dh;
2861
2862         } elsif (open my $fh, '<', "$git_dir/ctags") {
2863                 while (my $line = <$fh>) {
2864                         chomp $line;
2865                         $ctags->{$line}++ if $line;
2866                 }
2867                 close $fh;
2868
2869         } else {
2870                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2871                 foreach my $tag (@$taglist) {
2872                         $ctags->{$tag}++;
2873                 }
2874         }
2875
2876         return $ctags;
2877 }
2878
2879 # return hash, where keys are content tags ('ctags'),
2880 # and values are sum of weights of given tag in every project
2881 sub git_gather_all_ctags {
2882         my $projects = shift;
2883         my $ctags = {};
2884
2885         foreach my $p (@$projects) {
2886                 foreach my $ct (keys %{$p->{'ctags'}}) {
2887                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2888                 }
2889         }
2890
2891         return $ctags;
2892 }
2893
2894 sub git_populate_project_tagcloud {
2895         my $ctags = shift;
2896
2897         # First, merge different-cased tags; tags vote on casing
2898         my %ctags_lc;
2899         foreach (keys %$ctags) {
2900                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2901                 if (not $ctags_lc{lc $_}->{topcount}
2902                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2903                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2904                         $ctags_lc{lc $_}->{topname} = $_;
2905                 }
2906         }
2907
2908         my $cloud;
2909         my $matched = $input_params{'ctag'};
2910         if (eval { require HTML::TagCloud; 1; }) {
2911                 $cloud = HTML::TagCloud->new;
2912                 foreach my $ctag (sort keys %ctags_lc) {
2913                         # Pad the title with spaces so that the cloud looks
2914                         # less crammed.
2915                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2916                         $title =~ s/ /&nbsp;/g;
2917                         $title =~ s/^/&nbsp;/g;
2918                         $title =~ s/$/&nbsp;/g;
2919                         if (defined $matched && $matched eq $ctag) {
2920                                 $title = qq(<span class="match">$title</span>);
2921                         }
2922                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2923                                     $ctags_lc{$ctag}->{count});
2924                 }
2925         } else {
2926                 $cloud = {};
2927                 foreach my $ctag (keys %ctags_lc) {
2928                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2929                         if (defined $matched && $matched eq $ctag) {
2930                                 $title = qq(<span class="match">$title</span>);
2931                         }
2932                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2933                         $cloud->{$ctag}{ctag} =
2934                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2935                 }
2936         }
2937         return $cloud;
2938 }
2939
2940 sub git_show_project_tagcloud {
2941         my ($cloud, $count) = @_;
2942         if (ref $cloud eq 'HTML::TagCloud') {
2943                 return $cloud->html_and_css($count);
2944         } else {
2945                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
2946                 return
2947                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
2948                         join (', ', map {
2949                                 $cloud->{$_}->{'ctag'}
2950                         } splice(@tags, 0, $count)) .
2951                         '</div>';
2952         }
2953 }
2954
2955 sub git_get_project_url_list {
2956         my $path = shift;
2957
2958         $git_dir = "$projectroot/$path";
2959         open my $fd, '<', "$git_dir/cloneurl"
2960                 or return wantarray ?
2961                 @{ config_to_multi(git_get_project_config('url')) } :
2962                    config_to_multi(git_get_project_config('url'));
2963         my @git_project_url_list = map { chomp; $_ } <$fd>;
2964         close $fd;
2965
2966         return wantarray ? @git_project_url_list : \@git_project_url_list;
2967 }
2968
2969 sub git_get_projects_list {
2970         my $filter = shift || '';
2971         my $paranoid = shift;
2972         my @list;
2973
2974         if (-d $projects_list) {
2975                 # search in directory
2976                 my $dir = $projects_list;
2977                 # remove the trailing "/"
2978                 $dir =~ s!/+$!!;
2979                 my $pfxlen = length("$dir");
2980                 my $pfxdepth = ($dir =~ tr!/!!);
2981                 # when filtering, search only given subdirectory
2982                 if ($filter && !$paranoid) {
2983                         $dir .= "/$filter";
2984                         $dir =~ s!/+$!!;
2985                 }
2986
2987                 File::Find::find({
2988                         follow_fast => 1, # follow symbolic links
2989                         follow_skip => 2, # ignore duplicates
2990                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2991                         wanted => sub {
2992                                 # global variables
2993                                 our $project_maxdepth;
2994                                 our $projectroot;
2995                                 # skip project-list toplevel, if we get it.
2996                                 return if (m!^[/.]$!);
2997                                 # only directories can be git repositories
2998                                 return unless (-d $_);
2999                                 # don't traverse too deep (Find is super slow on os x)
3000                                 # $project_maxdepth excludes depth of $projectroot
3001                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3002                                         $File::Find::prune = 1;
3003                                         return;
3004                                 }
3005
3006                                 my $path = substr($File::Find::name, $pfxlen + 1);
3007                                 # paranoidly only filter here
3008                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3009                                         next;
3010                                 }
3011                                 # we check related file in $projectroot
3012                                 if (check_export_ok("$projectroot/$path")) {
3013                                         push @list, { path => $path };
3014                                         $File::Find::prune = 1;
3015                                 }
3016                         },
3017                 }, "$dir");
3018
3019         } elsif (-f $projects_list) {
3020                 # read from file(url-encoded):
3021                 # 'git%2Fgit.git Linus+Torvalds'
3022                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3023                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3024                 open my $fd, '<', $projects_list or return;
3025         PROJECT:
3026                 while (my $line = <$fd>) {
3027                         chomp $line;
3028                         my ($path, $owner) = split ' ', $line;
3029                         $path = unescape($path);
3030                         $owner = unescape($owner);
3031                         if (!defined $path) {
3032                                 next;
3033                         }
3034                         # if $filter is rpovided, check if $path begins with $filter
3035                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3036                                 next;
3037                         }
3038                         if (check_export_ok("$projectroot/$path")) {
3039                                 my $pr = {
3040                                         path => $path
3041                                 };
3042                                 if ($owner) {
3043                                         $pr->{'owner'} = to_utf8($owner);
3044                                 }
3045                                 push @list, $pr;
3046                         }
3047                 }
3048                 close $fd;
3049         }
3050         return @list;
3051 }
3052
3053 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3054 # as side effects it sets 'forks' field to list of forks for forked projects
3055 sub filter_forks_from_projects_list {
3056         my $projects = shift;
3057
3058         my %trie; # prefix tree of directories (path components)
3059         # generate trie out of those directories that might contain forks
3060         foreach my $pr (@$projects) {
3061                 my $path = $pr->{'path'};
3062                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3063                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3064                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3065                 next unless (-d "$projectroot/$path"); # containing directory exists
3066                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3067
3068                 # add to trie
3069                 my @dirs = split('/', $path);
3070                 # walk the trie, until either runs out of components or out of trie
3071                 my $ref = \%trie;
3072                 while (scalar @dirs &&
3073                        exists($ref->{$dirs[0]})) {
3074                         $ref = $ref->{shift @dirs};
3075                 }
3076                 # create rest of trie structure from rest of components
3077                 foreach my $dir (@dirs) {
3078                         $ref = $ref->{$dir} = {};
3079                 }
3080                 # create end marker, store $pr as a data
3081                 $ref->{''} = $pr if (!exists $ref->{''});
3082         }
3083
3084         # filter out forks, by finding shortest prefix match for paths
3085         my @filtered;
3086  PROJECT:
3087         foreach my $pr (@$projects) {
3088                 # trie lookup
3089                 my $ref = \%trie;
3090         DIR:
3091                 foreach my $dir (split('/', $pr->{'path'})) {
3092                         if (exists $ref->{''}) {
3093                                 # found [shortest] prefix, is a fork - skip it
3094                                 push @{$ref->{''}{'forks'}}, $pr;
3095                                 next PROJECT;
3096                         }
3097                         if (!exists $ref->{$dir}) {
3098                                 # not in trie, cannot have prefix, not a fork
3099                                 push @filtered, $pr;
3100                                 next PROJECT;
3101                         }
3102                         # If the dir is there, we just walk one step down the trie.
3103                         $ref = $ref->{$dir};
3104                 }
3105                 # we ran out of trie
3106                 # (shouldn't happen: it's either no match, or end marker)
3107                 push @filtered, $pr;
3108         }
3109
3110         return @filtered;
3111 }
3112
3113 # note: fill_project_list_info must be run first,
3114 # for 'descr_long' and 'ctags' to be filled
3115 sub search_projects_list {
3116         my ($projlist, %opts) = @_;
3117         my $tagfilter  = $opts{'tagfilter'};
3118         my $search_re = $opts{'search_regexp'};
3119
3120         return @$projlist
3121                 unless ($tagfilter || $search_re);
3122
3123         # searching projects require filling to be run before it;
3124         fill_project_list_info($projlist,
3125                                $tagfilter  ? 'ctags' : (),
3126                                $search_re ? ('path', 'descr') : ());
3127         my @projects;
3128  PROJECT:
3129         foreach my $pr (@$projlist) {
3130
3131                 if ($tagfilter) {
3132                         next unless ref($pr->{'ctags'}) eq 'HASH';
3133                         next unless
3134                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3135                 }
3136
3137                 if ($search_re) {
3138                         next unless
3139                                 $pr->{'path'} =~ /$search_re/ ||
3140                                 $pr->{'descr_long'} =~ /$search_re/;
3141                 }
3142
3143                 push @projects, $pr;
3144         }
3145
3146         return @projects;
3147 }
3148
3149 our $gitweb_project_owner = undef;
3150 sub git_get_project_list_from_file {
3151
3152         return if (defined $gitweb_project_owner);
3153
3154         $gitweb_project_owner = {};
3155         # read from file (url-encoded):
3156         # 'git%2Fgit.git Linus+Torvalds'
3157         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3158         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3159         if (-f $projects_list) {
3160                 open(my $fd, '<', $projects_list);
3161                 while (my $line = <$fd>) {
3162                         chomp $line;
3163                         my ($pr, $ow) = split ' ', $line;
3164                         $pr = unescape($pr);
3165                         $ow = unescape($ow);
3166                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3167                 }
3168                 close $fd;
3169         }
3170 }
3171
3172 sub git_get_project_owner {
3173         my $project = shift;
3174         my $owner;
3175
3176         return undef unless $project;
3177         $git_dir = "$projectroot/$project";
3178
3179         if (!defined $gitweb_project_owner) {
3180                 git_get_project_list_from_file();
3181         }
3182
3183         if (exists $gitweb_project_owner->{$project}) {
3184                 $owner = $gitweb_project_owner->{$project};
3185         }
3186         if (!defined $owner){
3187                 $owner = git_get_project_config('owner');
3188         }
3189         if (!defined $owner) {
3190                 $owner = get_file_owner("$git_dir");
3191         }
3192
3193         return $owner;
3194 }
3195
3196 sub git_get_last_activity {
3197         my ($path) = @_;
3198         my $fd;
3199
3200         $git_dir = "$projectroot/$path";
3201         open($fd, "-|", git_cmd(), 'for-each-ref',
3202              '--format=%(committer)',
3203              '--sort=-committerdate',
3204              '--count=1',
3205              'refs/heads') or return;
3206         my $most_recent = <$fd>;
3207         close $fd or return;
3208         if (defined $most_recent &&
3209             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3210                 my $timestamp = $1;
3211                 my $age = time - $timestamp;
3212                 return ($age, age_string($age));
3213         }
3214         return (undef, undef);
3215 }
3216
3217 # Implementation note: when a single remote is wanted, we cannot use 'git
3218 # remote show -n' because that command always work (assuming it's a remote URL
3219 # if it's not defined), and we cannot use 'git remote show' because that would
3220 # try to make a network roundtrip. So the only way to find if that particular
3221 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3222 # and when we find what we want.
3223 sub git_get_remotes_list {
3224         my $wanted = shift;
3225         my %remotes = ();
3226
3227         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3228         return unless $fd;
3229         while (my $remote = <$fd>) {
3230                 chomp $remote;
3231                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3232                 next if $wanted and not $remote eq $wanted;
3233                 my ($url, $key) = ($1, $2);
3234
3235                 $remotes{$remote} ||= { 'heads' => () };
3236                 $remotes{$remote}{$key} = $url;
3237         }
3238         close $fd or return;
3239         return wantarray ? %remotes : \%remotes;
3240 }
3241
3242 # Takes a hash of remotes as first parameter and fills it by adding the
3243 # available remote heads for each of the indicated remotes.
3244 sub fill_remote_heads {
3245         my $remotes = shift;
3246         my @heads = map { "remotes/$_" } keys %$remotes;
3247         my @remoteheads = git_get_heads_list(undef, @heads);
3248         foreach my $remote (keys %$remotes) {
3249                 $remotes->{$remote}{'heads'} = [ grep {
3250                         $_->{'name'} =~ s!^$remote/!!
3251                         } @remoteheads ];
3252         }
3253 }
3254
3255 sub git_get_references {
3256         my $type = shift || "";
3257         my %refs;
3258         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3259         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3260         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3261                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3262                 or return;
3263
3264         while (my $line = <$fd>) {
3265                 chomp $line;
3266                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3267                         if (defined $refs{$1}) {
3268                                 push @{$refs{$1}}, $2;
3269                         } else {
3270                                 $refs{$1} = [ $2 ];
3271                         }
3272                 }
3273         }
3274         close $fd or return;
3275         return \%refs;
3276 }
3277
3278 sub git_get_rev_name_tags {
3279         my $hash = shift || return undef;
3280
3281         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3282                 or return;
3283         my $name_rev = <$fd>;
3284         close $fd;
3285
3286         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3287                 return $1;
3288         } else {
3289                 # catches also '$hash undefined' output
3290                 return undef;
3291         }
3292 }
3293
3294 ## ----------------------------------------------------------------------
3295 ## parse to hash functions
3296
3297 sub parse_date {
3298         my $epoch = shift;
3299         my $tz = shift || "-0000";
3300
3301         my %date;
3302         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3303         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3304         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3305         $date{'hour'} = $hour;
3306         $date{'minute'} = $min;
3307         $date{'mday'} = $mday;
3308         $date{'day'} = $days[$wday];
3309         $date{'month'} = $months[$mon];
3310         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3311                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3312         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3313                              $mday, $months[$mon], $hour ,$min;
3314         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3315                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3316
3317         my ($tz_sign, $tz_hour, $tz_min) =
3318                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3319         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3320         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3321         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3322         $date{'hour_local'} = $hour;
3323         $date{'minute_local'} = $min;
3324         $date{'tz_local'} = $tz;
3325         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3326                                   1900+$year, $mon+1, $mday,
3327                                   $hour, $min, $sec, $tz);
3328         return %date;
3329 }
3330
3331 sub parse_tag {
3332         my $tag_id = shift;
3333         my %tag;
3334         my @comment;
3335
3336         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3337         $tag{'id'} = $tag_id;
3338         while (my $line = <$fd>) {
3339                 chomp $line;
3340                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3341                         $tag{'object'} = $1;
3342                 } elsif ($line =~ m/^type (.+)$/) {
3343                         $tag{'type'} = $1;
3344                 } elsif ($line =~ m/^tag (.+)$/) {
3345                         $tag{'name'} = $1;
3346                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3347                         $tag{'author'} = $1;
3348                         $tag{'author_epoch'} = $2;
3349                         $tag{'author_tz'} = $3;
3350                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3351                                 $tag{'author_name'}  = $1;
3352                                 $tag{'author_email'} = $2;
3353                         } else {
3354                                 $tag{'author_name'} = $tag{'author'};
3355                         }
3356                 } elsif ($line =~ m/--BEGIN/) {
3357                         push @comment, $line;
3358                         last;
3359                 } elsif ($line eq "") {
3360                         last;
3361                 }
3362         }
3363         push @comment, <$fd>;
3364         $tag{'comment'} = \@comment;
3365         close $fd or return;
3366         if (!defined $tag{'name'}) {
3367                 return
3368         };
3369         return %tag
3370 }
3371
3372 sub parse_commit_text {
3373         my ($commit_text, $withparents) = @_;
3374         my @commit_lines = split '\n', $commit_text;
3375         my %co;
3376
3377         pop @commit_lines; # Remove '\0'
3378
3379         if (! @commit_lines) {
3380                 return;
3381         }
3382
3383         my $header = shift @commit_lines;
3384         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3385                 return;
3386         }
3387         ($co{'id'}, my @parents) = split ' ', $header;
3388         while (my $line = shift @commit_lines) {
3389                 last if $line eq "\n";
3390                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3391                         $co{'tree'} = $1;
3392                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3393                         push @parents, $1;
3394                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3395                         $co{'author'} = to_utf8($1);
3396                         $co{'author_epoch'} = $2;
3397                         $co{'author_tz'} = $3;
3398                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3399                                 $co{'author_name'}  = $1;
3400                                 $co{'author_email'} = $2;
3401                         } else {
3402                                 $co{'author_name'} = $co{'author'};
3403                         }
3404                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3405                         $co{'committer'} = to_utf8($1);
3406                         $co{'committer_epoch'} = $2;
3407                         $co{'committer_tz'} = $3;
3408                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3409                                 $co{'committer_name'}  = $1;
3410                                 $co{'committer_email'} = $2;
3411                         } else {
3412                                 $co{'committer_name'} = $co{'committer'};
3413                         }
3414                 }
3415         }
3416         if (!defined $co{'tree'}) {
3417                 return;
3418         };
3419         $co{'parents'} = \@parents;
3420         $co{'parent'} = $parents[0];
3421
3422         foreach my $title (@commit_lines) {
3423                 $title =~ s/^    //;
3424                 if ($title ne "") {
3425                         $co{'title'} = chop_str($title, 80, 5);
3426                         # remove leading stuff of merges to make the interesting part visible
3427                         if (length($title) > 50) {
3428                                 $title =~ s/^Automatic //;
3429                                 $title =~ s/^merge (of|with) /Merge ... /i;
3430                                 if (length($title) > 50) {
3431                                         $title =~ s/(http|rsync):\/\///;
3432                                 }
3433                                 if (length($title) > 50) {
3434                                         $title =~ s/(master|www|rsync)\.//;
3435                                 }
3436                                 if (length($title) > 50) {
3437                                         $title =~ s/kernel.org:?//;
3438                                 }
3439                                 if (length($title) > 50) {
3440                                         $title =~ s/\/pub\/scm//;
3441                                 }
3442                         }
3443                         $co{'title_short'} = chop_str($title, 50, 5);
3444                         last;
3445                 }
3446         }
3447         if (! defined $co{'title'} || $co{'title'} eq "") {
3448                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3449         }
3450         # remove added spaces
3451         foreach my $line (@commit_lines) {
3452                 $line =~ s/^    //;
3453         }
3454         $co{'comment'} = \@commit_lines;
3455
3456         my $age = time - $co{'committer_epoch'};
3457         $co{'age'} = $age;
3458         $co{'age_string'} = age_string($age);
3459         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3460         if ($age > 60*60*24*7*2) {
3461                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3462                 $co{'age_string_age'} = $co{'age_string'};
3463         } else {
3464                 $co{'age_string_date'} = $co{'age_string'};
3465                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3466         }
3467         return %co;
3468 }
3469
3470 sub parse_commit {
3471         my ($commit_id) = @_;
3472         my %co;
3473
3474         local $/ = "\0";
3475
3476         open my $fd, "-|", git_cmd(), "rev-list",
3477                 "--parents",
3478                 "--header",
3479                 "--max-count=1",
3480                 $commit_id,
3481                 "--",
3482                 or die_error(500, "Open git-rev-list failed");
3483         %co = parse_commit_text(<$fd>, 1);
3484         close $fd;
3485
3486         return %co;
3487 }
3488
3489 sub parse_commits {
3490         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3491         my @cos;
3492
3493         $maxcount ||= 1;
3494         $skip ||= 0;
3495
3496         local $/ = "\0";
3497
3498         open my $fd, "-|", git_cmd(), "rev-list",
3499                 "--header",
3500                 @args,
3501                 ("--max-count=" . $maxcount),
3502                 ("--skip=" . $skip),
3503                 @extra_options,
3504                 $commit_id,
3505                 "--",
3506                 ($filename ? ($filename) : ())
3507                 or die_error(500, "Open git-rev-list failed");
3508         while (my $line = <$fd>) {
3509                 my %co = parse_commit_text($line);
3510                 push @cos, \%co;
3511         }
3512         close $fd;
3513
3514         return wantarray ? @cos : \@cos;
3515 }
3516
3517 # parse line of git-diff-tree "raw" output
3518 sub parse_difftree_raw_line {
3519         my $line = shift;
3520         my %res;
3521
3522         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3523         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3524         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3525                 $res{'from_mode'} = $1;
3526                 $res{'to_mode'} = $2;
3527                 $res{'from_id'} = $3;
3528                 $res{'to_id'} = $4;
3529                 $res{'status'} = $5;
3530                 $res{'similarity'} = $6;
3531                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3532                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3533                 } else {
3534                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3535                 }
3536         }
3537         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3538         # combined diff (for merge commit)
3539         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3540                 $res{'nparents'}  = length($1);
3541                 $res{'from_mode'} = [ split(' ', $2) ];
3542                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3543                 $res{'from_id'} = [ split(' ', $3) ];
3544                 $res{'to_id'} = pop @{$res{'from_id'}};
3545                 $res{'status'} = [ split('', $4) ];
3546                 $res{'to_file'} = unquote($5);
3547         }
3548         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3549         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3550                 $res{'commit'} = $1;
3551         }
3552
3553         return wantarray ? %res : \%res;
3554 }
3555
3556 # wrapper: return parsed line of git-diff-tree "raw" output
3557 # (the argument might be raw line, or parsed info)
3558 sub parsed_difftree_line {
3559         my $line_or_ref = shift;
3560
3561         if (ref($line_or_ref) eq "HASH") {
3562                 # pre-parsed (or generated by hand)
3563                 return $line_or_ref;
3564         } else {
3565                 return parse_difftree_raw_line($line_or_ref);
3566         }
3567 }
3568
3569 # parse line of git-ls-tree output
3570 sub parse_ls_tree_line {
3571         my $line = shift;
3572         my %opts = @_;
3573         my %res;
3574
3575         if ($opts{'-l'}) {
3576                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3577                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3578
3579                 $res{'mode'} = $1;
3580                 $res{'type'} = $2;
3581                 $res{'hash'} = $3;
3582                 $res{'size'} = $4;
3583                 if ($opts{'-z'}) {
3584                         $res{'name'} = $5;
3585                 } else {
3586                         $res{'name'} = unquote($5);
3587                 }
3588         } else {
3589                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3590                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3591
3592                 $res{'mode'} = $1;
3593                 $res{'type'} = $2;
3594                 $res{'hash'} = $3;
3595                 if ($opts{'-z'}) {
3596                         $res{'name'} = $4;
3597                 } else {
3598                         $res{'name'} = unquote($4);
3599                 }
3600         }
3601
3602         return wantarray ? %res : \%res;
3603 }
3604
3605 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3606 sub parse_from_to_diffinfo {
3607         my ($diffinfo, $from, $to, @parents) = @_;
3608
3609         if ($diffinfo->{'nparents'}) {
3610                 # combined diff
3611                 $from->{'file'} = [];
3612                 $from->{'href'} = [];
3613                 fill_from_file_info($diffinfo, @parents)
3614                         unless exists $diffinfo->{'from_file'};
3615                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3616                         $from->{'file'}[$i] =
3617                                 defined $diffinfo->{'from_file'}[$i] ?
3618                                         $diffinfo->{'from_file'}[$i] :
3619                                         $diffinfo->{'to_file'};
3620                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3621                                 $from->{'href'}[$i] = href(action=>"blob",
3622                                                            hash_base=>$parents[$i],
3623                                                            hash=>$diffinfo->{'from_id'}[$i],
3624                                                            file_name=>$from->{'file'}[$i]);
3625                         } else {
3626                                 $from->{'href'}[$i] = undef;
3627                         }
3628                 }
3629         } else {
3630                 # ordinary (not combined) diff
3631                 $from->{'file'} = $diffinfo->{'from_file'};
3632                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3633                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3634                                                hash=>$diffinfo->{'from_id'},
3635                                                file_name=>$from->{'file'});
3636                 } else {
3637                         delete $from->{'href'};
3638                 }
3639         }
3640
3641         $to->{'file'} = $diffinfo->{'to_file'};
3642         if (!is_deleted($diffinfo)) { # file exists in result
3643                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3644                                      hash=>$diffinfo->{'to_id'},
3645                                      file_name=>$to->{'file'});
3646         } else {
3647                 delete $to->{'href'};
3648         }
3649 }
3650
3651 ## ......................................................................
3652 ## parse to array of hashes functions
3653
3654 sub git_get_heads_list {
3655         my ($limit, @classes) = @_;
3656         @classes = ('heads') unless @classes;
3657         my @patterns = map { "refs/$_" } @classes;
3658         my @headslist;
3659
3660         open my $fd, '-|', git_cmd(), 'for-each-ref',
3661                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3662                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3663                 @patterns
3664                 or return;
3665         while (my $line = <$fd>) {
3666                 my %ref_item;
3667
3668                 chomp $line;
3669                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3670                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3671                 my ($committer, $epoch, $tz) =
3672                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3673                 $ref_item{'fullname'}  = $name;
3674                 $name =~ s!^refs/(?:head|remote)s/!!;
3675
3676                 $ref_item{'name'}  = $name;
3677                 $ref_item{'id'}    = $hash;
3678                 $ref_item{'title'} = $title || '(no commit message)';
3679                 $ref_item{'epoch'} = $epoch;
3680                 if ($epoch) {
3681                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3682                 } else {
3683                         $ref_item{'age'} = "unknown";
3684                 }
3685
3686                 push @headslist, \%ref_item;
3687         }
3688         close $fd;
3689
3690         return wantarray ? @headslist : \@headslist;
3691 }
3692
3693 sub git_get_tags_list {
3694         my $limit = shift;
3695         my @tagslist;
3696
3697         open my $fd, '-|', git_cmd(), 'for-each-ref',
3698                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3699                 '--format=%(objectname) %(objecttype) %(refname) '.
3700                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3701                 'refs/tags'
3702                 or return;
3703         while (my $line = <$fd>) {
3704                 my %ref_item;
3705
3706                 chomp $line;
3707                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3708                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3709                 my ($creator, $epoch, $tz) =
3710                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3711                 $ref_item{'fullname'} = $name;
3712                 $name =~ s!^refs/tags/!!;
3713
3714                 $ref_item{'type'} = $type;
3715                 $ref_item{'id'} = $id;
3716                 $ref_item{'name'} = $name;
3717                 if ($type eq "tag") {
3718                         $ref_item{'subject'} = $title;
3719                         $ref_item{'reftype'} = $reftype;
3720                         $ref_item{'refid'}   = $refid;
3721                 } else {
3722                         $ref_item{'reftype'} = $type;
3723                         $ref_item{'refid'}   = $id;
3724                 }
3725
3726                 if ($type eq "tag" || $type eq "commit") {
3727                         $ref_item{'epoch'} = $epoch;
3728                         if ($epoch) {
3729                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3730                         } else {
3731                                 $ref_item{'age'} = "unknown";
3732                         }
3733                 }
3734
3735                 push @tagslist, \%ref_item;
3736         }
3737         close $fd;
3738
3739         return wantarray ? @tagslist : \@tagslist;
3740 }
3741
3742 ## ----------------------------------------------------------------------
3743 ## filesystem-related functions
3744
3745 sub get_file_owner {
3746         my $path = shift;
3747
3748         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3749         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3750         if (!defined $gcos) {
3751                 return undef;
3752         }
3753         my $owner = $gcos;
3754         $owner =~ s/[,;].*$//;
3755         return to_utf8($owner);
3756 }
3757
3758 # assume that file exists
3759 sub insert_file {
3760         my $filename = shift;
3761
3762         open my $fd, '<', $filename;
3763         print map { to_utf8($_) } <$fd>;
3764         close $fd;
3765 }
3766
3767 ## ......................................................................
3768 ## mimetype related functions
3769
3770 sub mimetype_guess_file {
3771         my $filename = shift;
3772         my $mimemap = shift;
3773         -r $mimemap or return undef;
3774
3775         my %mimemap;
3776         open(my $mh, '<', $mimemap) or return undef;
3777         while (<$mh>) {
3778                 next if m/^#/; # skip comments
3779                 my ($mimetype, @exts) = split(/\s+/);
3780                 foreach my $ext (@exts) {
3781                         $mimemap{$ext} = $mimetype;
3782                 }
3783         }
3784         close($mh);
3785
3786         $filename =~ /\.([^.]*)$/;
3787         return $mimemap{$1};
3788 }
3789
3790 sub mimetype_guess {
3791         my $filename = shift;
3792         my $mime;
3793         $filename =~ /\./ or return undef;
3794
3795         if ($mimetypes_file) {
3796                 my $file = $mimetypes_file;
3797                 if ($file !~ m!^/!) { # if it is relative path
3798                         # it is relative to project
3799                         $file = "$projectroot/$project/$file";
3800                 }
3801                 $mime = mimetype_guess_file($filename, $file);
3802         }
3803         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3804         return $mime;
3805 }
3806
3807 sub blob_mimetype {
3808         my $fd = shift;
3809         my $filename = shift;
3810
3811         if ($filename) {
3812                 my $mime = mimetype_guess($filename);
3813                 $mime and return $mime;
3814         }
3815
3816         # just in case
3817         return $default_blob_plain_mimetype unless $fd;
3818
3819         if (-T $fd) {
3820                 return 'text/plain';
3821         } elsif (! $filename) {
3822                 return 'application/octet-stream';
3823         } elsif ($filename =~ m/\.png$/i) {
3824                 return 'image/png';
3825         } elsif ($filename =~ m/\.gif$/i) {
3826                 return 'image/gif';
3827         } elsif ($filename =~ m/\.jpe?g$/i) {
3828                 return 'image/jpeg';
3829         } else {
3830                 return 'application/octet-stream';
3831         }
3832 }
3833
3834 sub blob_contenttype {
3835         my ($fd, $file_name, $type) = @_;
3836
3837         $type ||= blob_mimetype($fd, $file_name);
3838         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3839                 $type .= "; charset=$default_text_plain_charset";
3840         }
3841
3842         return $type;
3843 }
3844
3845 # guess file syntax for syntax highlighting; return undef if no highlighting
3846 # the name of syntax can (in the future) depend on syntax highlighter used
3847 sub guess_file_syntax {
3848         my ($highlight, $mimetype, $file_name) = @_;
3849         return undef unless ($highlight && defined $file_name);
3850         my $basename = basename($file_name, '.in');
3851         return $highlight_basename{$basename}
3852                 if exists $highlight_basename{$basename};
3853
3854         $basename =~ /\.([^.]*)$/;
3855         my $ext = $1 or return undef;
3856         return $highlight_ext{$ext}
3857                 if exists $highlight_ext{$ext};
3858
3859         return undef;
3860 }
3861
3862 # run highlighter and return FD of its output,
3863 # or return original FD if no highlighting
3864 sub run_highlighter {
3865         my ($fd, $highlight, $syntax) = @_;
3866         return $fd unless ($highlight && defined $syntax);
3867
3868         close $fd;
3869         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3870                   quote_command($highlight_bin).
3871                   " --replace-tabs=8 --fragment --syntax $syntax |"
3872                 or die_error(500, "Couldn't open file or run syntax highlighter");
3873         return $fd;
3874 }
3875
3876 ## ======================================================================
3877 ## functions printing HTML: header, footer, error page
3878
3879 sub get_page_title {
3880         my $title = to_utf8($site_name);
3881
3882         unless (defined $project) {
3883                 if (defined $project_filter) {
3884                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3885                 }
3886                 return $title;
3887         }
3888         $title .= " - " . to_utf8($project);
3889
3890         return $title unless (defined $action);
3891         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3892
3893         return $title unless (defined $file_name);
3894         $title .= " - " . esc_path($file_name);
3895         if ($action eq "tree" && $file_name !~ m|/$|) {
3896                 $title .= "/";
3897         }
3898
3899         return $title;
3900 }
3901
3902 sub get_content_type_html {
3903         # require explicit support from the UA if we are to send the page as
3904         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3905         # we have to do this because MSIE sometimes globs '*/*', pretending to
3906         # support xhtml+xml but choking when it gets what it asked for.
3907         if (defined $cgi->http('HTTP_ACCEPT') &&
3908             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3909             $cgi->Accept('application/xhtml+xml') != 0) {
3910                 return 'application/xhtml+xml';
3911         } else {
3912                 return 'text/html';
3913         }
3914 }
3915
3916 sub print_feed_meta {
3917         if (defined $project) {
3918                 my %href_params = get_feed_info();
3919                 if (!exists $href_params{'-title'}) {
3920                         $href_params{'-title'} = 'log';
3921                 }
3922
3923                 foreach my $format (qw(RSS Atom)) {
3924                         my $type = lc($format);
3925                         my %link_attr = (
3926                                 '-rel' => 'alternate',
3927                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3928                                 '-type' => "application/$type+xml"
3929                         );
3930
3931                         $href_params{'extra_options'} = undef;
3932                         $href_params{'action'} = $type;
3933                         $link_attr{'-href'} = href(%href_params);
3934                         print "<link ".
3935                               "rel=\"$link_attr{'-rel'}\" ".
3936                               "title=\"$link_attr{'-title'}\" ".
3937                               "href=\"$link_attr{'-href'}\" ".
3938                               "type=\"$link_attr{'-type'}\" ".
3939                               "/>\n";
3940
3941                         $href_params{'extra_options'} = '--no-merges';
3942                         $link_attr{'-href'} = href(%href_params);
3943                         $link_attr{'-title'} .= ' (no merges)';
3944                         print "<link ".
3945                               "rel=\"$link_attr{'-rel'}\" ".
3946                               "title=\"$link_attr{'-title'}\" ".
3947                               "href=\"$link_attr{'-href'}\" ".
3948                               "type=\"$link_attr{'-type'}\" ".
3949                               "/>\n";
3950                 }
3951
3952         } else {
3953                 printf('<link rel="alternate" title="%s projects list" '.
3954                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3955                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3956                 printf('<link rel="alternate" title="%s projects feeds" '.
3957                        'href="%s" type="text/x-opml" />'."\n",
3958                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3959         }
3960 }
3961
3962 sub print_header_links {
3963         my $status = shift;
3964
3965         # print out each stylesheet that exist, providing backwards capability
3966         # for those people who defined $stylesheet in a config file
3967         if (defined $stylesheet) {
3968                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3969         } else {
3970                 foreach my $stylesheet (@stylesheets) {
3971                         next unless $stylesheet;
3972                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3973                 }
3974         }
3975         print_feed_meta()
3976                 if ($status eq '200 OK');
3977         if (defined $favicon) {
3978                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3979         }
3980 }
3981
3982 sub print_nav_breadcrumbs_path {
3983         my $dirprefix = undef;
3984         while (my $part = shift) {
3985                 $dirprefix .= "/" if defined $dirprefix;
3986                 $dirprefix .= $part;
3987                 print $cgi->a({-href => href(project => undef,
3988                                              project_filter => $dirprefix,
3989                                              action => "project_list")},
3990                               esc_html($part)) . " / ";
3991         }
3992 }
3993
3994 sub print_nav_breadcrumbs {
3995         my %opts = @_;
3996
3997         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
3998                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
3999         }
4000         if (defined $project) {
4001                 my @dirname = split '/', $project;
4002                 my $projectbasename = pop @dirname;
4003                 print_nav_breadcrumbs_path(@dirname);
4004                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4005                 if (defined $action) {
4006                         my $action_print = $action ;
4007                         if (defined $opts{-action_extra}) {
4008                                 $action_print = $cgi->a({-href => href(action=>$action)},
4009                                         $action);
4010                         }
4011                         print " / $action_print";
4012                 }
4013                 if (defined $opts{-action_extra}) {
4014                         print " / $opts{-action_extra}";
4015                 }
4016                 print "\n";
4017         } elsif (defined $project_filter) {
4018                 print_nav_breadcrumbs_path(split '/', $project_filter);
4019         }
4020 }
4021
4022 sub print_search_form {
4023         if (!defined $searchtext) {
4024                 $searchtext = "";
4025         }
4026         my $search_hash;
4027         if (defined $hash_base) {
4028                 $search_hash = $hash_base;
4029         } elsif (defined $hash) {
4030                 $search_hash = $hash;
4031         } else {
4032                 $search_hash = "HEAD";
4033         }
4034         my $action = $my_uri;
4035         my $use_pathinfo = gitweb_check_feature('pathinfo');
4036         if ($use_pathinfo) {
4037                 $action .= "/".esc_url($project);
4038         }
4039         print $cgi->startform(-method => "get", -action => $action) .
4040               "<div class=\"search\">\n" .
4041               (!$use_pathinfo &&
4042               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4043               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4044               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4045               $cgi->popup_menu(-name => 'st', -default => 'commit',
4046                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4047               " " . $cgi->a({-href => href(action=>"search_help"),
4048                              -title => "search help" }, "?") . " search:\n",
4049               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4050               "<span title=\"Extended regular expression\">" .
4051               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4052                              -checked => $search_use_regexp) .
4053               "</span>" .
4054               "</div>" .
4055               $cgi->end_form() . "\n";
4056 }
4057
4058 sub git_header_html {
4059         my $status = shift || "200 OK";
4060         my $expires = shift;
4061         my %opts = @_;
4062
4063         my $title = get_page_title();
4064         my $content_type = get_content_type_html();
4065         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4066                            -status=> $status, -expires => $expires)
4067                 unless ($opts{'-no_http_header'});
4068         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4069         print <<EOF;
4070 <?xml version="1.0" encoding="utf-8"?>
4071 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4072 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4073 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4074 <!-- git core binaries version $git_version -->
4075 <head>
4076 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4077 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4078 <meta name="robots" content="index, nofollow"/>
4079 <title>$title</title>
4080 EOF
4081         # the stylesheet, favicon etc urls won't work correctly with path_info
4082         # unless we set the appropriate base URL
4083         if ($ENV{'PATH_INFO'}) {
4084                 print "<base href=\"".esc_url($base_url)."\" />\n";
4085         }
4086         print_header_links($status);
4087
4088         if (defined $site_html_head_string) {
4089                 print to_utf8($site_html_head_string);
4090         }
4091
4092         print "</head>\n" .
4093               "<body>\n";
4094
4095         if (defined $site_header && -f $site_header) {
4096                 insert_file($site_header);
4097         }
4098
4099         print "<div class=\"page_header\">\n";
4100         if (defined $logo) {
4101                 print $cgi->a({-href => esc_url($logo_url),
4102                                -title => $logo_label},
4103                               $cgi->img({-src => esc_url($logo),
4104                                          -width => 72, -height => 27,
4105                                          -alt => "git",
4106                                          -class => "logo"}));
4107         }
4108         print_nav_breadcrumbs(%opts);
4109         print "</div>\n";
4110
4111         my $have_search = gitweb_check_feature('search');
4112         if (defined $project && $have_search) {
4113                 print_search_form();
4114         }
4115 }
4116
4117 sub git_footer_html {
4118         my $feed_class = 'rss_logo';
4119
4120         print "<div class=\"page_footer\">\n";
4121         if (defined $project) {
4122                 my $descr = git_get_project_description($project);
4123                 if (defined $descr) {
4124                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4125                 }
4126
4127                 my %href_params = get_feed_info();
4128                 if (!%href_params) {
4129                         $feed_class .= ' generic';
4130                 }
4131                 $href_params{'-title'} ||= 'log';
4132
4133                 foreach my $format (qw(RSS Atom)) {
4134                         $href_params{'action'} = lc($format);
4135                         print $cgi->a({-href => href(%href_params),
4136                                       -title => "$href_params{'-title'} $format feed",
4137                                       -class => $feed_class}, $format)."\n";
4138                 }
4139
4140         } else {
4141                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4142                                              project_filter => $project_filter),
4143                               -class => $feed_class}, "OPML") . " ";
4144                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4145                                              project_filter => $project_filter),
4146                               -class => $feed_class}, "TXT") . "\n";
4147         }
4148         print "</div>\n"; # class="page_footer"
4149
4150         if (defined $t0 && gitweb_check_feature('timed')) {
4151                 print "<div id=\"generating_info\">\n";
4152                 print 'This page took '.
4153                       '<span id="generating_time" class="time_span">'.
4154                       tv_interval($t0, [ gettimeofday() ]).
4155                       ' seconds </span>'.
4156                       ' and '.
4157                       '<span id="generating_cmd">'.
4158                       $number_of_git_cmds.
4159                       '</span> git commands '.
4160                       " to generate.\n";
4161                 print "</div>\n"; # class="page_footer"
4162         }
4163
4164         if (defined $site_footer && -f $site_footer) {
4165                 insert_file($site_footer);
4166         }
4167
4168         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4169         if (defined $action &&
4170             $action eq 'blame_incremental') {
4171                 print qq!<script type="text/javascript">\n!.
4172                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4173                       qq!           "!. href() .qq!");\n!.
4174                       qq!</script>\n!;
4175         } else {
4176                 my ($jstimezone, $tz_cookie, $datetime_class) =
4177                         gitweb_get_feature('javascript-timezone');
4178
4179                 print qq!<script type="text/javascript">\n!.
4180                       qq!window.onload = function () {\n!;
4181                 if (gitweb_check_feature('javascript-actions')) {
4182                         print qq!       fixLinks();\n!;
4183                 }
4184                 if ($jstimezone && $tz_cookie && $datetime_class) {
4185                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4186                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4187                 }
4188                 print qq!};\n!.
4189                       qq!</script>\n!;
4190         }
4191
4192         print "</body>\n" .
4193               "</html>";
4194 }
4195
4196 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4197 # Example: die_error(404, 'Hash not found')
4198 # By convention, use the following status codes (as defined in RFC 2616):
4199 # 400: Invalid or missing CGI parameters, or
4200 #      requested object exists but has wrong type.
4201 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4202 #      this server or project.
4203 # 404: Requested object/revision/project doesn't exist.
4204 # 500: The server isn't configured properly, or
4205 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4206 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4207 # 503: The server is currently unavailable (because it is overloaded,
4208 #      or down for maintenance).  Generally, this is a temporary state.
4209 sub die_error {
4210         my $status = shift || 500;
4211         my $error = esc_html(shift) || "Internal Server Error";
4212         my $extra = shift;
4213         my %opts = @_;
4214
4215         my %http_responses = (
4216                 400 => '400 Bad Request',
4217                 403 => '403 Forbidden',
4218                 404 => '404 Not Found',
4219                 500 => '500 Internal Server Error',
4220                 503 => '503 Service Unavailable',
4221         );
4222         git_header_html($http_responses{$status}, undef, %opts);
4223         print <<EOF;
4224 <div class="page_body">
4225 <br /><br />
4226 $status - $error
4227 <br />
4228 EOF
4229         if (defined $extra) {
4230                 print "<hr />\n" .
4231                       "$extra\n";
4232         }
4233         print "</div>\n";
4234
4235         git_footer_html();
4236         goto DONE_GITWEB
4237                 unless ($opts{'-error_handler'});
4238 }
4239
4240 ## ----------------------------------------------------------------------
4241 ## functions printing or outputting HTML: navigation
4242
4243 sub git_print_page_nav {
4244         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4245         $extra = '' if !defined $extra; # pager or formats
4246
4247         my @navs = qw(summary shortlog log commit commitdiff tree);
4248         if ($suppress) {
4249                 @navs = grep { $_ ne $suppress } @navs;
4250         }
4251
4252         my %arg = map { $_ => {action=>$_} } @navs;
4253         if (defined $head) {
4254                 for (qw(commit commitdiff)) {
4255                         $arg{$_}{'hash'} = $head;
4256                 }
4257                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4258                         for (qw(shortlog log)) {
4259                                 $arg{$_}{'hash'} = $head;
4260                         }
4261                 }
4262         }
4263
4264         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4265         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4266
4267         my @actions = gitweb_get_feature('actions');
4268         my %repl = (
4269                 '%' => '%',
4270                 'n' => $project,         # project name
4271                 'f' => $git_dir,         # project path within filesystem
4272                 'h' => $treehead || '',  # current hash ('h' parameter)
4273                 'b' => $treebase || '',  # hash base ('hb' parameter)
4274         );
4275         while (@actions) {
4276                 my ($label, $link, $pos) = splice(@actions,0,3);
4277                 # insert
4278                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4279                 # munch munch
4280                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4281                 $arg{$label}{'_href'} = $link;
4282         }
4283
4284         print "<div class=\"page_nav\">\n" .
4285                 (join " | ",
4286                  map { $_ eq $current ?
4287                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4288                  } @navs);
4289         print "<br/>\n$extra<br/>\n" .
4290               "</div>\n";
4291 }
4292
4293 # returns a submenu for the nagivation of the refs views (tags, heads,
4294 # remotes) with the current view disabled and the remotes view only
4295 # available if the feature is enabled
4296 sub format_ref_views {
4297         my ($current) = @_;
4298         my @ref_views = qw{tags heads};
4299         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4300         return join " | ", map {
4301                 $_ eq $current ? $_ :
4302                 $cgi->a({-href => href(action=>$_)}, $_)
4303         } @ref_views
4304 }
4305
4306 sub format_paging_nav {
4307         my ($action, $page, $has_next_link) = @_;
4308         my $paging_nav;
4309
4310
4311         if ($page > 0) {
4312                 $paging_nav .=
4313                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4314                         " &sdot; " .
4315                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4316                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4317         } else {
4318                 $paging_nav .= "first &sdot; prev";
4319         }
4320
4321         if ($has_next_link) {
4322                 $paging_nav .= " &sdot; " .
4323                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4324                                  -accesskey => "n", -title => "Alt-n"}, "next");
4325         } else {
4326                 $paging_nav .= " &sdot; next";
4327         }
4328
4329         return $paging_nav;
4330 }
4331
4332 ## ......................................................................
4333 ## functions printing or outputting HTML: div
4334
4335 sub git_print_header_div {
4336         my ($action, $title, $hash, $hash_base) = @_;
4337         my %args = ();
4338
4339         $args{'action'} = $action;
4340         $args{'hash'} = $hash if $hash;
4341         $args{'hash_base'} = $hash_base if $hash_base;
4342
4343         print "<div class=\"header\">\n" .
4344               $cgi->a({-href => href(%args), -class => "title"},
4345               $title ? $title : $action) .
4346               "\n</div>\n";
4347 }
4348
4349 sub format_repo_url {
4350         my ($name, $url) = @_;
4351         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4352 }
4353
4354 # Group output by placing it in a DIV element and adding a header.
4355 # Options for start_div() can be provided by passing a hash reference as the
4356 # first parameter to the function.
4357 # Options to git_print_header_div() can be provided by passing an array
4358 # reference. This must follow the options to start_div if they are present.
4359 # The content can be a scalar, which is output as-is, a scalar reference, which
4360 # is output after html escaping, an IO handle passed either as *handle or
4361 # *handle{IO}, or a function reference. In the latter case all following
4362 # parameters will be taken as argument to the content function call.
4363 sub git_print_section {
4364         my ($div_args, $header_args, $content);
4365         my $arg = shift;
4366         if (ref($arg) eq 'HASH') {
4367                 $div_args = $arg;
4368                 $arg = shift;
4369         }
4370         if (ref($arg) eq 'ARRAY') {
4371                 $header_args = $arg;
4372                 $arg = shift;
4373         }
4374         $content = $arg;
4375
4376         print $cgi->start_div($div_args);
4377         git_print_header_div(@$header_args);
4378
4379         if (ref($content) eq 'CODE') {
4380                 $content->(@_);
4381         } elsif (ref($content) eq 'SCALAR') {
4382                 print esc_html($$content);
4383         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4384                 print <$content>;
4385         } elsif (!ref($content) && defined($content)) {
4386                 print $content;
4387         }
4388
4389         print $cgi->end_div;
4390 }
4391
4392 sub format_timestamp_html {
4393         my $date = shift;
4394         my $strtime = $date->{'rfc2822'};
4395
4396         my (undef, undef, $datetime_class) =
4397                 gitweb_get_feature('javascript-timezone');
4398         if ($datetime_class) {
4399                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4400         }
4401
4402         my $localtime_format = '(%02d:%02d %s)';
4403         if ($date->{'hour_local'} < 6) {
4404                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4405         }
4406         $strtime .= ' ' .
4407                     sprintf($localtime_format,
4408                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4409
4410         return $strtime;
4411 }
4412
4413 # Outputs the author name and date in long form
4414 sub git_print_authorship {
4415         my $co = shift;
4416         my %opts = @_;
4417         my $tag = $opts{-tag} || 'div';
4418         my $author = $co->{'author_name'};
4419
4420         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4421         print "<$tag class=\"author_date\">" .
4422               format_search_author($author, "author", esc_html($author)) .
4423               " [".format_timestamp_html(\%ad)."]".
4424               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4425               "</$tag>\n";
4426 }
4427
4428 # Outputs table rows containing the full author or committer information,
4429 # in the format expected for 'commit' view (& similar).
4430 # Parameters are a commit hash reference, followed by the list of people
4431 # to output information for. If the list is empty it defaults to both
4432 # author and committer.
4433 sub git_print_authorship_rows {
4434         my $co = shift;
4435         # too bad we can't use @people = @_ || ('author', 'committer')
4436         my @people = @_;
4437         @people = ('author', 'committer') unless @people;
4438         foreach my $who (@people) {
4439                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4440                 print "<tr><td>$who</td><td>" .
4441                       format_search_author($co->{"${who}_name"}, $who,
4442                                            esc_html($co->{"${who}_name"})) . " " .
4443                       format_search_author($co->{"${who}_email"}, $who,
4444                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4445                       "</td><td rowspan=\"2\">" .
4446                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4447                       "</td></tr>\n" .
4448                       "<tr>" .
4449                       "<td></td><td>" .
4450                       format_timestamp_html(\%wd) .
4451                       "</td>" .
4452                       "</tr>\n";
4453         }
4454 }
4455
4456 sub git_print_page_path {
4457         my $name = shift;
4458         my $type = shift;
4459         my $hb = shift;
4460
4461
4462         print "<div class=\"page_path\">";
4463         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4464                       -title => 'tree root'}, to_utf8("[$project]"));
4465         print " / ";
4466         if (defined $name) {
4467                 my @dirname = split '/', $name;
4468                 my $basename = pop @dirname;
4469                 my $fullname = '';
4470
4471                 foreach my $dir (@dirname) {
4472                         $fullname .= ($fullname ? '/' : '') . $dir;
4473                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4474                                                      hash_base=>$hb),
4475                                       -title => $fullname}, esc_path($dir));
4476                         print " / ";
4477                 }
4478                 if (defined $type && $type eq 'blob') {
4479                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4480                                                      hash_base=>$hb),
4481                                       -title => $name}, esc_path($basename));
4482                 } elsif (defined $type && $type eq 'tree') {
4483                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4484                                                      hash_base=>$hb),
4485                                       -title => $name}, esc_path($basename));
4486                         print " / ";
4487                 } else {
4488                         print esc_path($basename);
4489                 }
4490         }
4491         print "<br/></div>\n";
4492 }
4493
4494 sub git_print_log {
4495         my $log = shift;
4496         my %opts = @_;
4497
4498         if ($opts{'-remove_title'}) {
4499                 # remove title, i.e. first line of log
4500                 shift @$log;
4501         }
4502         # remove leading empty lines
4503         while (defined $log->[0] && $log->[0] eq "") {
4504                 shift @$log;
4505         }
4506
4507         # print log
4508         my $skip_blank_line = 0;
4509         foreach my $line (@$log) {
4510                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4511                         if (! $opts{'-remove_signoff'}) {
4512                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4513                                 $skip_blank_line = 1;
4514                         }
4515                         next;
4516                 }
4517
4518                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4519                         if (! $opts{'-remove_signoff'}) {
4520                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4521                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4522                                         "</span><br/>\n";
4523                                 $skip_blank_line = 1;
4524                         }
4525                         next;
4526                 }
4527
4528                 # print only one empty line
4529                 # do not print empty line after signoff
4530                 if ($line eq "") {
4531                         next if ($skip_blank_line);
4532                         $skip_blank_line = 1;
4533                 } else {
4534                         $skip_blank_line = 0;
4535                 }
4536
4537                 print format_log_line_html($line) . "<br/>\n";
4538         }
4539
4540         if ($opts{'-final_empty_line'}) {
4541                 # end with single empty line
4542                 print "<br/>\n" unless $skip_blank_line;
4543         }
4544 }
4545
4546 # return link target (what link points to)
4547 sub git_get_link_target {
4548         my $hash = shift;
4549         my $link_target;
4550
4551         # read link
4552         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4553                 or return;
4554         {
4555                 local $/ = undef;
4556                 $link_target = <$fd>;
4557         }
4558         close $fd
4559                 or return;
4560
4561         return $link_target;
4562 }
4563
4564 # given link target, and the directory (basedir) the link is in,
4565 # return target of link relative to top directory (top tree);
4566 # return undef if it is not possible (including absolute links).
4567 sub normalize_link_target {
4568         my ($link_target, $basedir) = @_;
4569
4570         # absolute symlinks (beginning with '/') cannot be normalized
4571         return if (substr($link_target, 0, 1) eq '/');
4572
4573         # normalize link target to path from top (root) tree (dir)
4574         my $path;
4575         if ($basedir) {
4576                 $path = $basedir . '/' . $link_target;
4577         } else {
4578                 # we are in top (root) tree (dir)
4579                 $path = $link_target;
4580         }
4581
4582         # remove //, /./, and /../
4583         my @path_parts;
4584         foreach my $part (split('/', $path)) {
4585                 # discard '.' and ''
4586                 next if (!$part || $part eq '.');
4587                 # handle '..'
4588                 if ($part eq '..') {
4589                         if (@path_parts) {
4590                                 pop @path_parts;
4591                         } else {
4592                                 # link leads outside repository (outside top dir)
4593                                 return;
4594                         }
4595                 } else {
4596                         push @path_parts, $part;
4597                 }
4598         }
4599         $path = join('/', @path_parts);
4600
4601         return $path;
4602 }
4603
4604 # print tree entry (row of git_tree), but without encompassing <tr> element
4605 sub git_print_tree_entry {
4606         my ($t, $basedir, $hash_base, $have_blame) = @_;
4607
4608         my %base_key = ();
4609         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4610
4611         # The format of a table row is: mode list link.  Where mode is
4612         # the mode of the entry, list is the name of the entry, an href,
4613         # and link is the action links of the entry.
4614
4615         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4616         if (exists $t->{'size'}) {
4617                 print "<td class=\"size\">$t->{'size'}</td>\n";
4618         }
4619         if ($t->{'type'} eq "blob") {
4620                 print "<td class=\"list\">" .
4621                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4622                                                file_name=>"$basedir$t->{'name'}", %base_key),
4623                                 -class => "list"}, esc_path($t->{'name'}));
4624                 if (S_ISLNK(oct $t->{'mode'})) {
4625                         my $link_target = git_get_link_target($t->{'hash'});
4626                         if ($link_target) {
4627                                 my $norm_target = normalize_link_target($link_target, $basedir);
4628                                 if (defined $norm_target) {
4629                                         print " -> " .
4630                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4631                                                                      file_name=>$norm_target),
4632                                                        -title => $norm_target}, esc_path($link_target));
4633                                 } else {
4634                                         print " -> " . esc_path($link_target);
4635                                 }
4636                         }
4637                 }
4638                 print "</td>\n";
4639                 print "<td class=\"link\">";
4640                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4641                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4642                               "blob");
4643                 if ($have_blame) {
4644                         print " | " .
4645                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4646                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4647                                       "blame");
4648                 }
4649                 if (defined $hash_base) {
4650                         print " | " .
4651                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4652                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4653                                       "history");
4654                 }
4655                 print " | " .
4656                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4657                                                file_name=>"$basedir$t->{'name'}")},
4658                                 "raw");
4659                 print "</td>\n";
4660
4661         } elsif ($t->{'type'} eq "tree") {
4662                 print "<td class=\"list\">";
4663                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4664                                              file_name=>"$basedir$t->{'name'}",
4665                                              %base_key)},
4666                               esc_path($t->{'name'}));
4667                 print "</td>\n";
4668                 print "<td class=\"link\">";
4669                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4670                                              file_name=>"$basedir$t->{'name'}",
4671                                              %base_key)},
4672                               "tree");
4673                 if (defined $hash_base) {
4674                         print " | " .
4675                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4676                                                      file_name=>"$basedir$t->{'name'}")},
4677                                       "history");
4678                 }
4679                 print "</td>\n";
4680         } else {
4681                 # unknown object: we can only present history for it
4682                 # (this includes 'commit' object, i.e. submodule support)
4683                 print "<td class=\"list\">" .
4684                       esc_path($t->{'name'}) .
4685                       "</td>\n";
4686                 print "<td class=\"link\">";
4687                 if (defined $hash_base) {
4688                         print $cgi->a({-href => href(action=>"history",
4689                                                      hash_base=>$hash_base,
4690                                                      file_name=>"$basedir$t->{'name'}")},
4691                                       "history");
4692                 }
4693                 print "</td>\n";
4694         }
4695 }
4696
4697 ## ......................................................................
4698 ## functions printing large fragments of HTML
4699
4700 # get pre-image filenames for merge (combined) diff
4701 sub fill_from_file_info {
4702         my ($diff, @parents) = @_;
4703
4704         $diff->{'from_file'} = [ ];
4705         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4706         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4707                 if ($diff->{'status'}[$i] eq 'R' ||
4708                     $diff->{'status'}[$i] eq 'C') {
4709                         $diff->{'from_file'}[$i] =
4710                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4711                 }
4712         }
4713
4714         return $diff;
4715 }
4716
4717 # is current raw difftree line of file deletion
4718 sub is_deleted {
4719         my $diffinfo = shift;
4720
4721         return $diffinfo->{'to_id'} eq ('0' x 40);
4722 }
4723
4724 # does patch correspond to [previous] difftree raw line
4725 # $diffinfo  - hashref of parsed raw diff format
4726 # $patchinfo - hashref of parsed patch diff format
4727 #              (the same keys as in $diffinfo)
4728 sub is_patch_split {
4729         my ($diffinfo, $patchinfo) = @_;
4730
4731         return defined $diffinfo && defined $patchinfo
4732                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4733 }
4734
4735
4736 sub git_difftree_body {
4737         my ($difftree, $hash, @parents) = @_;
4738         my ($parent) = $parents[0];
4739         my $have_blame = gitweb_check_feature('blame');
4740         print "<div class=\"list_head\">\n";
4741         if ($#{$difftree} > 10) {
4742                 print(($#{$difftree} + 1) . " files changed:\n");
4743         }
4744         print "</div>\n";
4745
4746         print "<table class=\"" .
4747               (@parents > 1 ? "combined " : "") .
4748               "diff_tree\">\n";
4749
4750         # header only for combined diff in 'commitdiff' view
4751         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4752         if ($has_header) {
4753                 # table header
4754                 print "<thead><tr>\n" .
4755                        "<th></th><th></th>\n"; # filename, patchN link
4756                 for (my $i = 0; $i < @parents; $i++) {
4757                         my $par = $parents[$i];
4758                         print "<th>" .
4759                               $cgi->a({-href => href(action=>"commitdiff",
4760                                                      hash=>$hash, hash_parent=>$par),
4761                                        -title => 'commitdiff to parent number ' .
4762                                                   ($i+1) . ': ' . substr($par,0,7)},
4763                                       $i+1) .
4764                               "&nbsp;</th>\n";
4765                 }
4766                 print "</tr></thead>\n<tbody>\n";
4767         }
4768
4769         my $alternate = 1;
4770         my $patchno = 0;
4771         foreach my $line (@{$difftree}) {
4772                 my $diff = parsed_difftree_line($line);
4773
4774                 if ($alternate) {
4775                         print "<tr class=\"dark\">\n";
4776                 } else {
4777                         print "<tr class=\"light\">\n";
4778                 }
4779                 $alternate ^= 1;
4780
4781                 if (exists $diff->{'nparents'}) { # combined diff
4782
4783                         fill_from_file_info($diff, @parents)
4784                                 unless exists $diff->{'from_file'};
4785
4786                         if (!is_deleted($diff)) {
4787                                 # file exists in the result (child) commit
4788                                 print "<td>" .
4789                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4790                                                              file_name=>$diff->{'to_file'},
4791                                                              hash_base=>$hash),
4792                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4793                                       "</td>\n";
4794                         } else {
4795                                 print "<td>" .
4796                                       esc_path($diff->{'to_file'}) .
4797                                       "</td>\n";
4798                         }
4799
4800                         if ($action eq 'commitdiff') {
4801                                 # link to patch
4802                                 $patchno++;
4803                                 print "<td class=\"link\">" .
4804                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4805                                               "patch") .
4806                                       " | " .
4807                                       "</td>\n";
4808                         }
4809
4810                         my $has_history = 0;
4811                         my $not_deleted = 0;
4812                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4813                                 my $hash_parent = $parents[$i];
4814                                 my $from_hash = $diff->{'from_id'}[$i];
4815                                 my $from_path = $diff->{'from_file'}[$i];
4816                                 my $status = $diff->{'status'}[$i];
4817
4818                                 $has_history ||= ($status ne 'A');
4819                                 $not_deleted ||= ($status ne 'D');
4820
4821                                 if ($status eq 'A') {
4822                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4823                                 } elsif ($status eq 'D') {
4824                                         print "<td class=\"link\">" .
4825                                               $cgi->a({-href => href(action=>"blob",
4826                                                                      hash_base=>$hash,
4827                                                                      hash=>$from_hash,
4828                                                                      file_name=>$from_path)},
4829                                                       "blob" . ($i+1)) .
4830                                               " | </td>\n";
4831                                 } else {
4832                                         if ($diff->{'to_id'} eq $from_hash) {
4833                                                 print "<td class=\"link nochange\">";
4834                                         } else {
4835                                                 print "<td class=\"link\">";
4836                                         }
4837                                         print $cgi->a({-href => href(action=>"blobdiff",
4838                                                                      hash=>$diff->{'to_id'},
4839                                                                      hash_parent=>$from_hash,
4840                                                                      hash_base=>$hash,
4841                                                                      hash_parent_base=>$hash_parent,
4842                                                                      file_name=>$diff->{'to_file'},
4843                                                                      file_parent=>$from_path)},
4844                                                       "diff" . ($i+1)) .
4845                                               " | </td>\n";
4846                                 }
4847                         }
4848
4849                         print "<td class=\"link\">";
4850                         if ($not_deleted) {
4851                                 print $cgi->a({-href => href(action=>"blob",
4852                                                              hash=>$diff->{'to_id'},
4853                                                              file_name=>$diff->{'to_file'},
4854                                                              hash_base=>$hash)},
4855                                               "blob");
4856                                 print " | " if ($has_history);
4857                         }
4858                         if ($has_history) {
4859                                 print $cgi->a({-href => href(action=>"history",
4860                                                              file_name=>$diff->{'to_file'},
4861                                                              hash_base=>$hash)},
4862                                               "history");
4863                         }
4864                         print "</td>\n";
4865
4866                         print "</tr>\n";
4867                         next; # instead of 'else' clause, to avoid extra indent
4868                 }
4869                 # else ordinary diff
4870
4871                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4872                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4873                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4874                         $to_mode_oct = oct $diff->{'to_mode'};
4875                         if (S_ISREG($to_mode_oct)) { # only for regular file
4876                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4877                         }
4878                         $to_file_type = file_type($diff->{'to_mode'});
4879                 }
4880                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4881                         $from_mode_oct = oct $diff->{'from_mode'};
4882                         if (S_ISREG($from_mode_oct)) { # only for regular file
4883                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4884                         }
4885                         $from_file_type = file_type($diff->{'from_mode'});
4886                 }
4887
4888                 if ($diff->{'status'} eq "A") { # created
4889                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4890                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4891                         $mode_chng   .= "]</span>";
4892                         print "<td>";
4893                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4894                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4895                                       -class => "list"}, esc_path($diff->{'file'}));
4896                         print "</td>\n";
4897                         print "<td>$mode_chng</td>\n";
4898                         print "<td class=\"link\">";
4899                         if ($action eq 'commitdiff') {
4900                                 # link to patch
4901                                 $patchno++;
4902                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4903                                               "patch") .
4904                                       " | ";
4905                         }
4906                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4907                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4908                                       "blob");
4909                         print "</td>\n";
4910
4911                 } elsif ($diff->{'status'} eq "D") { # deleted
4912                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4913                         print "<td>";
4914                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4915                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4916                                        -class => "list"}, esc_path($diff->{'file'}));
4917                         print "</td>\n";
4918                         print "<td>$mode_chng</td>\n";
4919                         print "<td class=\"link\">";
4920                         if ($action eq 'commitdiff') {
4921                                 # link to patch
4922                                 $patchno++;
4923                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4924                                               "patch") .
4925                                       " | ";
4926                         }
4927                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4928                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4929                                       "blob") . " | ";
4930                         if ($have_blame) {
4931                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4932                                                              file_name=>$diff->{'file'})},
4933                                               "blame") . " | ";
4934                         }
4935                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4936                                                      file_name=>$diff->{'file'})},
4937                                       "history");
4938                         print "</td>\n";
4939
4940                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4941                         my $mode_chnge = "";
4942                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4943                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4944                                 if ($from_file_type ne $to_file_type) {
4945                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4946                                 }
4947                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4948                                         if ($from_mode_str && $to_mode_str) {
4949                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4950                                         } elsif ($to_mode_str) {
4951                                                 $mode_chnge .= " mode: $to_mode_str";
4952                                         }
4953                                 }
4954                                 $mode_chnge .= "]</span>\n";
4955                         }
4956                         print "<td>";
4957                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4958                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4959                                       -class => "list"}, esc_path($diff->{'file'}));
4960                         print "</td>\n";
4961                         print "<td>$mode_chnge</td>\n";
4962                         print "<td class=\"link\">";
4963                         if ($action eq 'commitdiff') {
4964                                 # link to patch
4965                                 $patchno++;
4966                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4967                                               "patch") .
4968                                       " | ";
4969                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4970                                 # "commit" view and modified file (not onlu mode changed)
4971                                 print $cgi->a({-href => href(action=>"blobdiff",
4972                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4973                                                              hash_base=>$hash, hash_parent_base=>$parent,
4974                                                              file_name=>$diff->{'file'})},
4975                                               "diff") .
4976                                       " | ";
4977                         }
4978                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4979                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4980                                        "blob") . " | ";
4981                         if ($have_blame) {
4982                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4983                                                              file_name=>$diff->{'file'})},
4984                                               "blame") . " | ";
4985                         }
4986                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4987                                                      file_name=>$diff->{'file'})},
4988                                       "history");
4989                         print "</td>\n";
4990
4991                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4992                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4993                         my $nstatus = $status_name{$diff->{'status'}};
4994                         my $mode_chng = "";
4995                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4996                                 # mode also for directories, so we cannot use $to_mode_str
4997                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4998                         }
4999                         print "<td>" .
5000                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5001                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5002                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5003                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5004                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5005                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5006                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5007                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5008                               "<td class=\"link\">";
5009                         if ($action eq 'commitdiff') {
5010                                 # link to patch
5011                                 $patchno++;
5012                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5013                                               "patch") .
5014                                       " | ";
5015                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5016                                 # "commit" view and modified file (not only pure rename or copy)
5017                                 print $cgi->a({-href => href(action=>"blobdiff",
5018                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5019                                                              hash_base=>$hash, hash_parent_base=>$parent,
5020                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5021                                               "diff") .
5022                                       " | ";
5023                         }
5024                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5025                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5026                                       "blob") . " | ";
5027                         if ($have_blame) {
5028                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5029                                                              file_name=>$diff->{'to_file'})},
5030                                               "blame") . " | ";
5031                         }
5032                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5033                                                     file_name=>$diff->{'to_file'})},
5034                                       "history");
5035                         print "</td>\n";
5036
5037                 } # we should not encounter Unmerged (U) or Unknown (X) status
5038                 print "</tr>\n";
5039         }
5040         print "</tbody>" if $has_header;
5041         print "</table>\n";
5042 }
5043
5044 # Print context lines and then rem/add lines in a side-by-side manner.
5045 sub print_sidebyside_diff_lines {
5046         my ($ctx, $rem, $add) = @_;
5047
5048         # print context block before add/rem block
5049         if (@$ctx) {
5050                 print join '',
5051                         '<div class="chunk_block ctx">',
5052                                 '<div class="old">',
5053                                 @$ctx,
5054                                 '</div>',
5055                                 '<div class="new">',
5056                                 @$ctx,
5057                                 '</div>',
5058                         '</div>';
5059         }
5060
5061         if (!@$add) {
5062                 # pure removal
5063                 print join '',
5064                         '<div class="chunk_block rem">',
5065                                 '<div class="old">',
5066                                 @$rem,
5067                                 '</div>',
5068                         '</div>';
5069         } elsif (!@$rem) {
5070                 # pure addition
5071                 print join '',
5072                         '<div class="chunk_block add">',
5073                                 '<div class="new">',
5074                                 @$add,
5075                                 '</div>',
5076                         '</div>';
5077         } else {
5078                 print join '',
5079                         '<div class="chunk_block chg">',
5080                                 '<div class="old">',
5081                                 @$rem,
5082                                 '</div>',
5083                                 '<div class="new">',
5084                                 @$add,
5085                                 '</div>',
5086                         '</div>';
5087         }
5088 }
5089
5090 # Print context lines and then rem/add lines in inline manner.
5091 sub print_inline_diff_lines {
5092         my ($ctx, $rem, $add) = @_;
5093
5094         print @$ctx, @$rem, @$add;
5095 }
5096
5097 # Format removed and added line, mark changed part and HTML-format them.
5098 # Implementation is based on contrib/diff-highlight
5099 sub format_rem_add_lines_pair {
5100         my ($rem, $add, $num_parents) = @_;
5101
5102         # We need to untabify lines before split()'ing them;
5103         # otherwise offsets would be invalid.
5104         chomp $rem;
5105         chomp $add;
5106         $rem = untabify($rem);
5107         $add = untabify($add);
5108
5109         my @rem = split(//, $rem);
5110         my @add = split(//, $add);
5111         my ($esc_rem, $esc_add);
5112         # Ignore leading +/- characters for each parent.
5113         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5114         my ($prefix_has_nonspace, $suffix_has_nonspace);
5115
5116         my $shorter = (@rem < @add) ? @rem : @add;
5117         while ($prefix_len < $shorter) {
5118                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5119
5120                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5121                 $prefix_len++;
5122         }
5123
5124         while ($prefix_len + $suffix_len < $shorter) {
5125                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5126
5127                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5128                 $suffix_len++;
5129         }
5130
5131         # Mark lines that are different from each other, but have some common
5132         # part that isn't whitespace.  If lines are completely different, don't
5133         # mark them because that would make output unreadable, especially if
5134         # diff consists of multiple lines.
5135         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5136                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5137                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5138                 $esc_add = esc_html_hl_regions($add, 'marked',
5139                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5140         } else {
5141                 $esc_rem = esc_html($rem, -nbsp=>1);
5142                 $esc_add = esc_html($add, -nbsp=>1);
5143         }
5144
5145         return format_diff_line(\$esc_rem, 'rem'),
5146                format_diff_line(\$esc_add, 'add');
5147 }
5148
5149 # HTML-format diff context, removed and added lines.
5150 sub format_ctx_rem_add_lines {
5151         my ($ctx, $rem, $add, $num_parents) = @_;
5152         my (@new_ctx, @new_rem, @new_add);
5153         my $can_highlight = 0;
5154         my $is_combined = ($num_parents > 1);
5155
5156         # Highlight if every removed line has a corresponding added line.
5157         if (@$add > 0 && @$add == @$rem) {
5158                 $can_highlight = 1;
5159
5160                 # Highlight lines in combined diff only if the chunk contains
5161                 # diff between the same version, e.g.
5162                 #
5163                 #    - a
5164                 #   -  b
5165                 #    + c
5166                 #   +  d
5167                 #
5168                 # Otherwise the highlightling would be confusing.
5169                 if ($is_combined) {
5170                         for (my $i = 0; $i < @$add; $i++) {
5171                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5172                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5173
5174                                 $prefix_rem =~ s/-/+/g;
5175
5176                                 if ($prefix_rem ne $prefix_add) {
5177                                         $can_highlight = 0;
5178                                         last;
5179                                 }
5180                         }
5181                 }
5182         }
5183
5184         if ($can_highlight) {
5185                 for (my $i = 0; $i < @$add; $i++) {
5186                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5187                                 $rem->[$i], $add->[$i], $num_parents);
5188                         push @new_rem, $line_rem;
5189                         push @new_add, $line_add;
5190                 }
5191         } else {
5192                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5193                 @new_add = map { format_diff_line($_, 'add') } @$add;
5194         }
5195
5196         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5197
5198         return (\@new_ctx, \@new_rem, \@new_add);
5199 }
5200
5201 # Print context lines and then rem/add lines.
5202 sub print_diff_lines {
5203         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5204         my $is_combined = $num_parents > 1;
5205
5206         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5207                 $num_parents);
5208
5209         if ($diff_style eq 'sidebyside' && !$is_combined) {
5210                 print_sidebyside_diff_lines($ctx, $rem, $add);
5211         } else {
5212                 # default 'inline' style and unknown styles
5213                 print_inline_diff_lines($ctx, $rem, $add);
5214         }
5215 }
5216
5217 sub print_diff_chunk {
5218         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5219         my (@ctx, @rem, @add);
5220
5221         # The class of the previous line.
5222         my $prev_class = '';
5223
5224         return unless @chunk;
5225
5226         # incomplete last line might be among removed or added lines,
5227         # or both, or among context lines: find which
5228         for (my $i = 1; $i < @chunk; $i++) {
5229                 if ($chunk[$i][0] eq 'incomplete') {
5230                         $chunk[$i][0] = $chunk[$i-1][0];
5231                 }
5232         }
5233
5234         # guardian
5235         push @chunk, ["", ""];
5236
5237         foreach my $line_info (@chunk) {
5238                 my ($class, $line) = @$line_info;
5239
5240                 # print chunk headers
5241                 if ($class && $class eq 'chunk_header') {
5242                         print format_diff_line($line, $class, $from, $to);
5243                         next;
5244                 }
5245
5246                 ## print from accumulator when have some add/rem lines or end
5247                 # of chunk (flush context lines), or when have add and rem
5248                 # lines and new block is reached (otherwise add/rem lines could
5249                 # be reordered)
5250                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5251                     (@rem && @add && $class ne $prev_class)) {
5252                         print_diff_lines(\@ctx, \@rem, \@add,
5253                                          $diff_style, $num_parents);
5254                         @ctx = @rem = @add = ();
5255                 }
5256
5257                 ## adding lines to accumulator
5258                 # guardian value
5259                 last unless $line;
5260                 # rem, add or change
5261                 if ($class eq 'rem') {
5262                         push @rem, $line;
5263                 } elsif ($class eq 'add') {
5264                         push @add, $line;
5265                 }
5266                 # context line
5267                 if ($class eq 'ctx') {
5268                         push @ctx, $line;
5269                 }
5270
5271                 $prev_class = $class;
5272         }
5273 }
5274
5275 sub git_patchset_body {
5276         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5277         my ($hash_parent) = $hash_parents[0];
5278
5279         my $is_combined = (@hash_parents > 1);
5280         my $patch_idx = 0;
5281         my $patch_number = 0;
5282         my $patch_line;
5283         my $diffinfo;
5284         my $to_name;
5285         my (%from, %to);
5286         my @chunk; # for side-by-side diff
5287
5288         print "<div class=\"patchset\">\n";
5289
5290         # skip to first patch
5291         while ($patch_line = <$fd>) {
5292                 chomp $patch_line;
5293
5294                 last if ($patch_line =~ m/^diff /);
5295         }
5296
5297  PATCH:
5298         while ($patch_line) {
5299
5300                 # parse "git diff" header line
5301                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5302                         # $1 is from_name, which we do not use
5303                         $to_name = unquote($2);
5304                         $to_name =~ s!^b/!!;
5305                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5306                         # $1 is 'cc' or 'combined', which we do not use
5307                         $to_name = unquote($2);
5308                 } else {
5309                         $to_name = undef;
5310                 }
5311
5312                 # check if current patch belong to current raw line
5313                 # and parse raw git-diff line if needed
5314                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5315                         # this is continuation of a split patch
5316                         print "<div class=\"patch cont\">\n";
5317                 } else {
5318                         # advance raw git-diff output if needed
5319                         $patch_idx++ if defined $diffinfo;
5320
5321                         # read and prepare patch information
5322                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5323
5324                         # compact combined diff output can have some patches skipped
5325                         # find which patch (using pathname of result) we are at now;
5326                         if ($is_combined) {
5327                                 while ($to_name ne $diffinfo->{'to_file'}) {
5328                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5329                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5330                                               "</div>\n";  # class="patch"
5331
5332                                         $patch_idx++;
5333                                         $patch_number++;
5334
5335                                         last if $patch_idx > $#$difftree;
5336                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5337                                 }
5338                         }
5339
5340                         # modifies %from, %to hashes
5341                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5342
5343                         # this is first patch for raw difftree line with $patch_idx index
5344                         # we index @$difftree array from 0, but number patches from 1
5345                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5346                 }
5347
5348                 # git diff header
5349                 #assert($patch_line =~ m/^diff /) if DEBUG;
5350                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5351                 $patch_number++;
5352                 # print "git diff" header
5353                 print format_git_diff_header_line($patch_line, $diffinfo,
5354                                                   \%from, \%to);
5355
5356                 # print extended diff header
5357                 print "<div class=\"diff extended_header\">\n";
5358         EXTENDED_HEADER:
5359                 while ($patch_line = <$fd>) {
5360                         chomp $patch_line;
5361
5362                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5363
5364                         print format_extended_diff_header_line($patch_line, $diffinfo,
5365                                                                \%from, \%to);
5366                 }
5367                 print "</div>\n"; # class="diff extended_header"
5368
5369                 # from-file/to-file diff header
5370                 if (! $patch_line) {
5371                         print "</div>\n"; # class="patch"
5372                         last PATCH;
5373                 }
5374                 next PATCH if ($patch_line =~ m/^diff /);
5375                 #assert($patch_line =~ m/^---/) if DEBUG;
5376
5377                 my $last_patch_line = $patch_line;
5378                 $patch_line = <$fd>;
5379                 chomp $patch_line;
5380                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5381
5382                 print format_diff_from_to_header($last_patch_line, $patch_line,
5383                                                  $diffinfo, \%from, \%to,
5384                                                  @hash_parents);
5385
5386                 # the patch itself
5387         LINE:
5388                 while ($patch_line = <$fd>) {
5389                         chomp $patch_line;
5390
5391                         next PATCH if ($patch_line =~ m/^diff /);
5392
5393                         my $class = diff_line_class($patch_line, \%from, \%to);
5394
5395                         if ($class eq 'chunk_header') {
5396                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5397                                 @chunk = ();
5398                         }
5399
5400                         push @chunk, [ $class, $patch_line ];
5401                 }
5402
5403         } continue {
5404                 if (@chunk) {
5405                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5406                         @chunk = ();
5407                 }
5408                 print "</div>\n"; # class="patch"
5409         }
5410
5411         # for compact combined (--cc) format, with chunk and patch simplification
5412         # the patchset might be empty, but there might be unprocessed raw lines
5413         for (++$patch_idx if $patch_number > 0;
5414              $patch_idx < @$difftree;
5415              ++$patch_idx) {
5416                 # read and prepare patch information
5417                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5418
5419                 # generate anchor for "patch" links in difftree / whatchanged part
5420                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5421                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5422                       "</div>\n";  # class="patch"
5423
5424                 $patch_number++;
5425         }
5426
5427         if ($patch_number == 0) {
5428                 if (@hash_parents > 1) {
5429                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5430                 } else {
5431                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5432                 }
5433         }
5434
5435         print "</div>\n"; # class="patchset"
5436 }
5437
5438 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5439
5440 sub git_project_search_form {
5441         my ($searchtext, $search_use_regexp) = @_;
5442
5443         my $limit = '';
5444         if ($project_filter) {
5445                 $limit = " in '$project_filter/'";
5446         }
5447
5448         print "<div class=\"projsearch\">\n";
5449         print $cgi->startform(-method => 'get', -action => $my_uri) .
5450               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5451         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5452                 if (defined $project_filter);
5453         print $cgi->textfield(-name => 's', -value => $searchtext,
5454                               -title => "Search project by name and description$limit",
5455                               -size => 60) . "\n" .
5456               "<span title=\"Extended regular expression\">" .
5457               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5458                              -checked => $search_use_regexp) .
5459               "</span>\n" .
5460               $cgi->submit(-name => 'btnS', -value => 'Search') .
5461               $cgi->end_form() . "\n" .
5462               $cgi->a({-href => href(project => undef, searchtext => undef,
5463                                      project_filter => $project_filter)},
5464                       esc_html("List all projects$limit")) . "<br />\n";
5465         print "</div>\n";
5466 }
5467
5468 # entry for given @keys needs filling if at least one of keys in list
5469 # is not present in %$project_info
5470 sub project_info_needs_filling {
5471         my ($project_info, @keys) = @_;
5472
5473         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5474         foreach my $key (@keys) {
5475                 if (!exists $project_info->{$key}) {
5476                         return 1;
5477                 }
5478         }
5479         return;
5480 }
5481
5482 # fills project list info (age, description, owner, category, forks, etc.)
5483 # for each project in the list, removing invalid projects from
5484 # returned list, or fill only specified info.
5485 #
5486 # Invalid projects are removed from the returned list if and only if you
5487 # ask 'age' or 'age_string' to be filled, because they are the only fields
5488 # that run unconditionally git command that requires repository, and
5489 # therefore do always check if project repository is invalid.
5490 #
5491 # USAGE:
5492 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5493 #   ensures that 'descr_long' and 'ctags' fields are filled
5494 # * @project_list = fill_project_list_info(\@project_list)
5495 #   ensures that all fields are filled (and invalid projects removed)
5496 #
5497 # NOTE: modifies $projlist, but does not remove entries from it
5498 sub fill_project_list_info {
5499         my ($projlist, @wanted_keys) = @_;
5500         my @projects;
5501         my $filter_set = sub { return @_; };
5502         if (@wanted_keys) {
5503                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5504                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5505         }
5506
5507         my $show_ctags = gitweb_check_feature('ctags');
5508  PROJECT:
5509         foreach my $pr (@$projlist) {
5510                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5511                         my (@activity) = git_get_last_activity($pr->{'path'});
5512                         unless (@activity) {
5513                                 next PROJECT;
5514                         }
5515                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5516                 }
5517                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5518                         my $descr = git_get_project_description($pr->{'path'}) || "";
5519                         $descr = to_utf8($descr);
5520                         $pr->{'descr_long'} = $descr;
5521                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5522                 }
5523                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5524                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5525                 }
5526                 if ($show_ctags &&
5527                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5528                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5529                 }
5530                 if ($projects_list_group_categories &&
5531                     project_info_needs_filling($pr, $filter_set->('category'))) {
5532                         my $cat = git_get_project_category($pr->{'path'}) ||
5533                                                            $project_list_default_category;
5534                         $pr->{'category'} = to_utf8($cat);
5535                 }
5536
5537                 push @projects, $pr;
5538         }
5539
5540         return @projects;
5541 }
5542
5543 sub sort_projects_list {
5544         my ($projlist, $order) = @_;
5545
5546         sub order_str {
5547                 my $key = shift;
5548                 return sub { $a->{$key} cmp $b->{$key} };
5549         }
5550
5551         sub order_num_then_undef {
5552                 my $key = shift;
5553                 return sub {
5554                         defined $a->{$key} ?
5555                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5556                                 (defined $b->{$key} ? 1 : 0)
5557                 };
5558         }
5559
5560         my %orderings = (
5561                 project => order_str('path'),
5562                 descr => order_str('descr_long'),
5563                 owner => order_str('owner'),
5564                 age => order_num_then_undef('age'),
5565         );
5566
5567         my $ordering = $orderings{$order};
5568         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5569 }
5570
5571 # returns a hash of categories, containing the list of project
5572 # belonging to each category
5573 sub build_projlist_by_category {
5574         my ($projlist, $from, $to) = @_;
5575         my %categories;
5576
5577         $from = 0 unless defined $from;
5578         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5579
5580         for (my $i = $from; $i <= $to; $i++) {
5581                 my $pr = $projlist->[$i];
5582                 push @{$categories{ $pr->{'category'} }}, $pr;
5583         }
5584
5585         return wantarray ? %categories : \%categories;
5586 }
5587
5588 # print 'sort by' <th> element, generating 'sort by $name' replay link
5589 # if that order is not selected
5590 sub print_sort_th {
5591         print format_sort_th(@_);
5592 }
5593
5594 sub format_sort_th {
5595         my ($name, $order, $header) = @_;
5596         my $sort_th = "";
5597         $header ||= ucfirst($name);
5598
5599         if ($order eq $name) {
5600                 $sort_th .= "<th>$header</th>\n";
5601         } else {
5602                 $sort_th .= "<th>" .
5603                             $cgi->a({-href => href(-replay=>1, order=>$name),
5604                                      -class => "header"}, $header) .
5605                             "</th>\n";
5606         }
5607
5608         return $sort_th;
5609 }
5610
5611 sub git_project_list_rows {
5612         my ($projlist, $from, $to, $check_forks) = @_;
5613
5614         $from = 0 unless defined $from;
5615         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5616
5617         my $alternate = 1;
5618         for (my $i = $from; $i <= $to; $i++) {
5619                 my $pr = $projlist->[$i];
5620
5621                 if ($alternate) {
5622                         print "<tr class=\"dark\">\n";
5623                 } else {
5624                         print "<tr class=\"light\">\n";
5625                 }
5626                 $alternate ^= 1;
5627
5628                 if ($check_forks) {
5629                         print "<td>";
5630                         if ($pr->{'forks'}) {
5631                                 my $nforks = scalar @{$pr->{'forks'}};
5632                                 if ($nforks > 0) {
5633                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5634                                                        -title => "$nforks forks"}, "+");
5635                                 } else {
5636                                         print $cgi->span({-title => "$nforks forks"}, "+");
5637                                 }
5638                         }
5639                         print "</td>\n";
5640                 }
5641                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5642                                         -class => "list"},
5643                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5644                       "</td>\n" .
5645                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5646                                         -class => "list",
5647                                         -title => $pr->{'descr_long'}},
5648                                         $search_regexp
5649                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5650                                                                     $pr->{'descr'}, $search_regexp)
5651                                         : esc_html($pr->{'descr'})) .
5652                       "</td>\n";
5653                 unless ($omit_owner) {
5654                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5655                 }
5656                 unless ($omit_age_column) {
5657                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5658                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5659                 }
5660                 print"<td class=\"link\">" .
5661                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5662                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5663                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5664                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5665                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5666                       "</td>\n" .
5667                       "</tr>\n";
5668         }
5669 }
5670
5671 sub git_project_list_body {
5672         # actually uses global variable $project
5673         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5674         my @projects = @$projlist;
5675
5676         my $check_forks = gitweb_check_feature('forks');
5677         my $show_ctags  = gitweb_check_feature('ctags');
5678         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5679         $check_forks = undef
5680                 if ($tagfilter || $search_regexp);
5681
5682         # filtering out forks before filling info allows to do less work
5683         @projects = filter_forks_from_projects_list(\@projects)
5684                 if ($check_forks);
5685         # search_projects_list pre-fills required info
5686         @projects = search_projects_list(\@projects,
5687                                          'search_regexp' => $search_regexp,
5688                                          'tagfilter'  => $tagfilter)
5689                 if ($tagfilter || $search_regexp);
5690         # fill the rest
5691         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5692         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5693         push @all_fields, 'owner' unless($omit_owner);
5694         @projects = fill_project_list_info(\@projects, @all_fields);
5695
5696         $order ||= $default_projects_order;
5697         $from = 0 unless defined $from;
5698         $to = $#projects if (!defined $to || $#projects < $to);
5699
5700         # short circuit
5701         if ($from > $to) {
5702                 print "<center>\n".
5703                       "<b>No such projects found</b><br />\n".
5704                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5705                       "</center>\n<br />\n";
5706                 return;
5707         }
5708
5709         @projects = sort_projects_list(\@projects, $order);
5710
5711         if ($show_ctags) {
5712                 my $ctags = git_gather_all_ctags(\@projects);
5713                 my $cloud = git_populate_project_tagcloud($ctags);
5714                 print git_show_project_tagcloud($cloud, 64);
5715         }
5716
5717         print "<table class=\"project_list\">\n";
5718         unless ($no_header) {
5719                 print "<tr>\n";
5720                 if ($check_forks) {
5721                         print "<th></th>\n";
5722                 }
5723                 print_sort_th('project', $order, 'Project');
5724                 print_sort_th('descr', $order, 'Description');
5725                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5726                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5727                 print "<th></th>\n" . # for links
5728                       "</tr>\n";
5729         }
5730
5731         if ($projects_list_group_categories) {
5732                 # only display categories with projects in the $from-$to window
5733                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5734                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5735                 foreach my $cat (sort keys %categories) {
5736                         unless ($cat eq "") {
5737                                 print "<tr>\n";
5738                                 if ($check_forks) {
5739                                         print "<td></td>\n";
5740                                 }
5741                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5742                                 print "</tr>\n";
5743                         }
5744
5745                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5746                 }
5747         } else {
5748                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5749         }
5750
5751         if (defined $extra) {
5752                 print "<tr>\n";
5753                 if ($check_forks) {
5754                         print "<td></td>\n";
5755                 }
5756                 print "<td colspan=\"5\">$extra</td>\n" .
5757                       "</tr>\n";
5758         }
5759         print "</table>\n";
5760 }
5761
5762 sub git_log_body {
5763         # uses global variable $project
5764         my ($commitlist, $from, $to, $refs, $extra) = @_;
5765
5766         $from = 0 unless defined $from;
5767         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5768
5769         for (my $i = 0; $i <= $to; $i++) {
5770                 my %co = %{$commitlist->[$i]};
5771                 next if !%co;
5772                 my $commit = $co{'id'};
5773                 my $ref = format_ref_marker($refs, $commit);
5774                 git_print_header_div('commit',
5775                                "<span class=\"age\">$co{'age_string'}</span>" .
5776                                esc_html($co{'title'}) . $ref,
5777                                $commit);
5778                 print "<div class=\"title_text\">\n" .
5779                       "<div class=\"log_link\">\n" .
5780                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5781                       " | " .
5782                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5783                       " | " .
5784                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5785                       "<br/>\n" .
5786                       "</div>\n";
5787                       git_print_authorship(\%co, -tag => 'span');
5788                       print "<br/>\n</div>\n";
5789
5790                 print "<div class=\"log_body\">\n";
5791                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5792                 print "</div>\n";
5793         }
5794         if ($extra) {
5795                 print "<div class=\"page_nav\">\n";
5796                 print "$extra\n";
5797                 print "</div>\n";
5798         }
5799 }
5800
5801 sub git_shortlog_body {
5802         # uses global variable $project
5803         my ($commitlist, $from, $to, $refs, $extra) = @_;
5804
5805         $from = 0 unless defined $from;
5806         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5807
5808         print "<table class=\"shortlog\">\n";
5809         my $alternate = 1;
5810         for (my $i = $from; $i <= $to; $i++) {
5811                 my %co = %{$commitlist->[$i]};
5812                 my $commit = $co{'id'};
5813                 my $ref = format_ref_marker($refs, $commit);
5814                 if ($alternate) {
5815                         print "<tr class=\"dark\">\n";
5816                 } else {
5817                         print "<tr class=\"light\">\n";
5818                 }
5819                 $alternate ^= 1;
5820                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5821                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5822                       format_author_html('td', \%co, 10) . "<td>";
5823                 print format_subject_html($co{'title'}, $co{'title_short'},
5824                                           href(action=>"commit", hash=>$commit), $ref);
5825                 print "</td>\n" .
5826                       "<td class=\"link\">" .
5827                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5828                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5829                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5830                 my $snapshot_links = format_snapshot_links($commit);
5831                 if (defined $snapshot_links) {
5832                         print " | " . $snapshot_links;
5833                 }
5834                 print "</td>\n" .
5835                       "</tr>\n";
5836         }
5837         if (defined $extra) {
5838                 print "<tr>\n" .
5839                       "<td colspan=\"4\">$extra</td>\n" .
5840                       "</tr>\n";
5841         }
5842         print "</table>\n";
5843 }
5844
5845 sub git_history_body {
5846         # Warning: assumes constant type (blob or tree) during history
5847         my ($commitlist, $from, $to, $refs, $extra,
5848             $file_name, $file_hash, $ftype) = @_;
5849
5850         $from = 0 unless defined $from;
5851         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5852
5853         print "<table class=\"history\">\n";
5854         my $alternate = 1;
5855         for (my $i = $from; $i <= $to; $i++) {
5856                 my %co = %{$commitlist->[$i]};
5857                 if (!%co) {
5858                         next;
5859                 }
5860                 my $commit = $co{'id'};
5861
5862                 my $ref = format_ref_marker($refs, $commit);
5863
5864                 if ($alternate) {
5865                         print "<tr class=\"dark\">\n";
5866                 } else {
5867                         print "<tr class=\"light\">\n";
5868                 }
5869                 $alternate ^= 1;
5870                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5871         # shortlog:   format_author_html('td', \%co, 10)
5872                       format_author_html('td', \%co, 15, 3) . "<td>";
5873                 # originally git_history used chop_str($co{'title'}, 50)
5874                 print format_subject_html($co{'title'}, $co{'title_short'},
5875                                           href(action=>"commit", hash=>$commit), $ref);
5876                 print "</td>\n" .
5877                       "<td class=\"link\">" .
5878                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5879                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5880
5881                 if ($ftype eq 'blob') {
5882                         my $blob_current = $file_hash;
5883                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5884                         if (defined $blob_current && defined $blob_parent &&
5885                                         $blob_current ne $blob_parent) {
5886                                 print " | " .
5887                                         $cgi->a({-href => href(action=>"blobdiff",
5888                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5889                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5890                                                                file_name=>$file_name)},
5891                                                 "diff to current");
5892                         }
5893                 }
5894                 print "</td>\n" .
5895                       "</tr>\n";
5896         }
5897         if (defined $extra) {
5898                 print "<tr>\n" .
5899                       "<td colspan=\"4\">$extra</td>\n" .
5900                       "</tr>\n";
5901         }
5902         print "</table>\n";
5903 }
5904
5905 sub git_tags_body {
5906         # uses global variable $project
5907         my ($taglist, $from, $to, $extra) = @_;
5908         $from = 0 unless defined $from;
5909         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5910
5911         print "<table class=\"tags\">\n";
5912         my $alternate = 1;
5913         for (my $i = $from; $i <= $to; $i++) {
5914                 my $entry = $taglist->[$i];
5915                 my %tag = %$entry;
5916                 my $comment = $tag{'subject'};
5917                 my $comment_short;
5918                 if (defined $comment) {
5919                         $comment_short = chop_str($comment, 30, 5);
5920                 }
5921                 if ($alternate) {
5922                         print "<tr class=\"dark\">\n";
5923                 } else {
5924                         print "<tr class=\"light\">\n";
5925                 }
5926                 $alternate ^= 1;
5927                 if (defined $tag{'age'}) {
5928                         print "<td><i>$tag{'age'}</i></td>\n";
5929                 } else {
5930                         print "<td></td>\n";
5931                 }
5932                 print "<td>" .
5933                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5934                                -class => "list name"}, esc_html($tag{'name'})) .
5935                       "</td>\n" .
5936                       "<td>";
5937                 if (defined $comment) {
5938                         print format_subject_html($comment, $comment_short,
5939                                                   href(action=>"tag", hash=>$tag{'id'}));
5940                 }
5941                 print "</td>\n" .
5942                       "<td class=\"selflink\">";
5943                 if ($tag{'type'} eq "tag") {
5944                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5945                 } else {
5946                         print "&nbsp;";
5947                 }
5948                 print "</td>\n" .
5949                       "<td class=\"link\">" . " | " .
5950                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5951                 if ($tag{'reftype'} eq "commit") {
5952                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5953                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5954                 } elsif ($tag{'reftype'} eq "blob") {
5955                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5956                 }
5957                 print "</td>\n" .
5958                       "</tr>";
5959         }
5960         if (defined $extra) {
5961                 print "<tr>\n" .
5962                       "<td colspan=\"5\">$extra</td>\n" .
5963                       "</tr>\n";
5964         }
5965         print "</table>\n";
5966 }
5967
5968 sub git_heads_body {
5969         # uses global variable $project
5970         my ($headlist, $head_at, $from, $to, $extra) = @_;
5971         $from = 0 unless defined $from;
5972         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5973
5974         print "<table class=\"heads\">\n";
5975         my $alternate = 1;
5976         for (my $i = $from; $i <= $to; $i++) {
5977                 my $entry = $headlist->[$i];
5978                 my %ref = %$entry;
5979                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
5980                 if ($alternate) {
5981                         print "<tr class=\"dark\">\n";
5982                 } else {
5983                         print "<tr class=\"light\">\n";
5984                 }
5985                 $alternate ^= 1;
5986                 print "<td><i>$ref{'age'}</i></td>\n" .
5987                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5988                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5989                                -class => "list name"},esc_html($ref{'name'})) .
5990                       "</td>\n" .
5991                       "<td class=\"link\">" .
5992                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5993                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5994                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
5995                       "</td>\n" .
5996                       "</tr>";
5997         }
5998         if (defined $extra) {
5999                 print "<tr>\n" .
6000                       "<td colspan=\"3\">$extra</td>\n" .
6001                       "</tr>\n";
6002         }
6003         print "</table>\n";
6004 }
6005
6006 # Display a single remote block
6007 sub git_remote_block {
6008         my ($remote, $rdata, $limit, $head) = @_;
6009
6010         my $heads = $rdata->{'heads'};
6011         my $fetch = $rdata->{'fetch'};
6012         my $push = $rdata->{'push'};
6013
6014         my $urls_table = "<table class=\"projects_list\">\n" ;
6015
6016         if (defined $fetch) {
6017                 if ($fetch eq $push) {
6018                         $urls_table .= format_repo_url("URL", $fetch);
6019                 } else {
6020                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6021                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6022                 }
6023         } elsif (defined $push) {
6024                 $urls_table .= format_repo_url("Push URL", $push);
6025         } else {
6026                 $urls_table .= format_repo_url("", "No remote URL");
6027         }
6028
6029         $urls_table .= "</table>\n";
6030
6031         my $dots;
6032         if (defined $limit && $limit < @$heads) {
6033                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6034         }
6035
6036         print $urls_table;
6037         git_heads_body($heads, $head, 0, $limit, $dots);
6038 }
6039
6040 # Display a list of remote names with the respective fetch and push URLs
6041 sub git_remotes_list {
6042         my ($remotedata, $limit) = @_;
6043         print "<table class=\"heads\">\n";
6044         my $alternate = 1;
6045         my @remotes = sort keys %$remotedata;
6046
6047         my $limited = $limit && $limit < @remotes;
6048
6049         $#remotes = $limit - 1 if $limited;
6050
6051         while (my $remote = shift @remotes) {
6052                 my $rdata = $remotedata->{$remote};
6053                 my $fetch = $rdata->{'fetch'};
6054                 my $push = $rdata->{'push'};
6055                 if ($alternate) {
6056                         print "<tr class=\"dark\">\n";
6057                 } else {
6058                         print "<tr class=\"light\">\n";
6059                 }
6060                 $alternate ^= 1;
6061                 print "<td>" .
6062                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6063                                -class=> "list name"},esc_html($remote)) .
6064                       "</td>";
6065                 print "<td class=\"link\">" .
6066                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6067                       " | " .
6068                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6069                       "</td>";
6070
6071                 print "</tr>\n";
6072         }
6073
6074         if ($limited) {
6075                 print "<tr>\n" .
6076                       "<td colspan=\"3\">" .
6077                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6078                       "</td>\n" . "</tr>\n";
6079         }
6080
6081         print "</table>";
6082 }
6083
6084 # Display remote heads grouped by remote, unless there are too many
6085 # remotes, in which case we only display the remote names
6086 sub git_remotes_body {
6087         my ($remotedata, $limit, $head) = @_;
6088         if ($limit and $limit < keys %$remotedata) {
6089                 git_remotes_list($remotedata, $limit);
6090         } else {
6091                 fill_remote_heads($remotedata);
6092                 while (my ($remote, $rdata) = each %$remotedata) {
6093                         git_print_section({-class=>"remote", -id=>$remote},
6094                                 ["remotes", $remote, $remote], sub {
6095                                         git_remote_block($remote, $rdata, $limit, $head);
6096                                 });
6097                 }
6098         }
6099 }
6100
6101 sub git_search_message {
6102         my %co = @_;
6103
6104         my $greptype;
6105         if ($searchtype eq 'commit') {
6106                 $greptype = "--grep=";
6107         } elsif ($searchtype eq 'author') {
6108                 $greptype = "--author=";
6109         } elsif ($searchtype eq 'committer') {
6110                 $greptype = "--committer=";
6111         }
6112         $greptype .= $searchtext;
6113         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6114                                        $greptype, '--regexp-ignore-case',
6115                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6116
6117         my $paging_nav = '';
6118         if ($page > 0) {
6119                 $paging_nav .=
6120                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6121                                 "first") .
6122                         " &sdot; " .
6123                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6124                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6125         } else {
6126                 $paging_nav .= "first &sdot; prev";
6127         }
6128         my $next_link = '';
6129         if ($#commitlist >= 100) {
6130                 $next_link =
6131                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6132                                  -accesskey => "n", -title => "Alt-n"}, "next");
6133                 $paging_nav .= " &sdot; $next_link";
6134         } else {
6135                 $paging_nav .= " &sdot; next";
6136         }
6137
6138         git_header_html();
6139
6140         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6141         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6142         if ($page == 0 && !@commitlist) {
6143                 print "<p>No match.</p>\n";
6144         } else {
6145                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6146         }
6147
6148         git_footer_html();
6149 }
6150
6151 sub git_search_changes {
6152         my %co = @_;
6153
6154         local $/ = "\n";
6155         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6156                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6157                 ($search_use_regexp ? '--pickaxe-regex' : ())
6158                         or die_error(500, "Open git-log failed");
6159
6160         git_header_html();
6161
6162         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6163         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6164
6165         print "<table class=\"pickaxe search\">\n";
6166         my $alternate = 1;
6167         undef %co;
6168         my @files;
6169         while (my $line = <$fd>) {
6170                 chomp $line;
6171                 next unless $line;
6172
6173                 my %set = parse_difftree_raw_line($line);
6174                 if (defined $set{'commit'}) {
6175                         # finish previous commit
6176                         if (%co) {
6177                                 print "</td>\n" .
6178                                       "<td class=\"link\">" .
6179                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6180                                               "commit") .
6181                                       " | " .
6182                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6183                                                              hash_base=>$co{'id'})},
6184                                               "tree") .
6185                                       "</td>\n" .
6186                                       "</tr>\n";
6187                         }
6188
6189                         if ($alternate) {
6190                                 print "<tr class=\"dark\">\n";
6191                         } else {
6192                                 print "<tr class=\"light\">\n";
6193                         }
6194                         $alternate ^= 1;
6195                         %co = parse_commit($set{'commit'});
6196                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6197                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6198                               "<td><i>$author</i></td>\n" .
6199                               "<td>" .
6200                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6201                                       -class => "list subject"},
6202                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6203                 } elsif (defined $set{'to_id'}) {
6204                         next if ($set{'to_id'} =~ m/^0{40}$/);
6205
6206                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6207                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6208                                       -class => "list"},
6209                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6210                               "<br/>\n";
6211                 }
6212         }
6213         close $fd;
6214
6215         # finish last commit (warning: repetition!)
6216         if (%co) {
6217                 print "</td>\n" .
6218                       "<td class=\"link\">" .
6219                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6220                               "commit") .
6221                       " | " .
6222                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6223                                              hash_base=>$co{'id'})},
6224                               "tree") .
6225                       "</td>\n" .
6226                       "</tr>\n";
6227         }
6228
6229         print "</table>\n";
6230
6231         git_footer_html();
6232 }
6233
6234 sub git_search_files {
6235         my %co = @_;
6236
6237         local $/ = "\n";
6238         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6239                 $search_use_regexp ? ('-E', '-i') : '-F',
6240                 $searchtext, $co{'tree'}
6241                         or die_error(500, "Open git-grep failed");
6242
6243         git_header_html();
6244
6245         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6246         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6247
6248         print "<table class=\"grep_search\">\n";
6249         my $alternate = 1;
6250         my $matches = 0;
6251         my $lastfile = '';
6252         my $file_href;
6253         while (my $line = <$fd>) {
6254                 chomp $line;
6255                 my ($file, $lno, $ltext, $binary);
6256                 last if ($matches++ > 1000);
6257                 if ($line =~ /^Binary file (.+) matches$/) {
6258                         $file = $1;
6259                         $binary = 1;
6260                 } else {
6261                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6262                         $file =~ s/^$co{'tree'}://;
6263                 }
6264                 if ($file ne $lastfile) {
6265                         $lastfile and print "</td></tr>\n";
6266                         if ($alternate++) {
6267                                 print "<tr class=\"dark\">\n";
6268                         } else {
6269                                 print "<tr class=\"light\">\n";
6270                         }
6271                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6272                                           file_name=>$file);
6273                         print "<td class=\"list\">".
6274                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6275                         print "</td><td>\n";
6276                         $lastfile = $file;
6277                 }
6278                 if ($binary) {
6279                         print "<div class=\"binary\">Binary file</div>\n";
6280                 } else {
6281                         $ltext = untabify($ltext);
6282                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6283                                 $ltext = esc_html($1, -nbsp=>1);
6284                                 $ltext .= '<span class="match">';
6285                                 $ltext .= esc_html($2, -nbsp=>1);
6286                                 $ltext .= '</span>';
6287                                 $ltext .= esc_html($3, -nbsp=>1);
6288                         } else {
6289                                 $ltext = esc_html($ltext, -nbsp=>1);
6290                         }
6291                         print "<div class=\"pre\">" .
6292                                 $cgi->a({-href => $file_href.'#l'.$lno,
6293                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6294                                 ' ' .  $ltext . "</div>\n";
6295                 }
6296         }
6297         if ($lastfile) {
6298                 print "</td></tr>\n";
6299                 if ($matches > 1000) {
6300                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6301                 }
6302         } else {
6303                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6304         }
6305         close $fd;
6306
6307         print "</table>\n";
6308
6309         git_footer_html();
6310 }
6311
6312 sub git_search_grep_body {
6313         my ($commitlist, $from, $to, $extra) = @_;
6314         $from = 0 unless defined $from;
6315         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6316
6317         print "<table class=\"commit_search\">\n";
6318         my $alternate = 1;
6319         for (my $i = $from; $i <= $to; $i++) {
6320                 my %co = %{$commitlist->[$i]};
6321                 if (!%co) {
6322                         next;
6323                 }
6324                 my $commit = $co{'id'};
6325                 if ($alternate) {
6326                         print "<tr class=\"dark\">\n";
6327                 } else {
6328                         print "<tr class=\"light\">\n";
6329                 }
6330                 $alternate ^= 1;
6331                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6332                       format_author_html('td', \%co, 15, 5) .
6333                       "<td>" .
6334                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6335                                -class => "list subject"},
6336                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6337                 my $comment = $co{'comment'};
6338                 foreach my $line (@$comment) {
6339                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6340                                 my ($lead, $match, $trail) = ($1, $2, $3);
6341                                 $match = chop_str($match, 70, 5, 'center');
6342                                 my $contextlen = int((80 - length($match))/2);
6343                                 $contextlen = 30 if ($contextlen > 30);
6344                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6345                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6346
6347                                 $lead  = esc_html($lead);
6348                                 $match = esc_html($match);
6349                                 $trail = esc_html($trail);
6350
6351                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6352                         }
6353                 }
6354                 print "</td>\n" .
6355                       "<td class=\"link\">" .
6356                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6357                       " | " .
6358                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6359                       " | " .
6360                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6361                 print "</td>\n" .
6362                       "</tr>\n";
6363         }
6364         if (defined $extra) {
6365                 print "<tr>\n" .
6366                       "<td colspan=\"3\">$extra</td>\n" .
6367                       "</tr>\n";
6368         }
6369         print "</table>\n";
6370 }
6371
6372 ## ======================================================================
6373 ## ======================================================================
6374 ## actions
6375
6376 sub git_project_list {
6377         my $order = $input_params{'order'};
6378         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6379                 die_error(400, "Unknown order parameter");
6380         }
6381
6382         my @list = git_get_projects_list($project_filter, $strict_export);
6383         if (!@list) {
6384                 die_error(404, "No projects found");
6385         }
6386
6387         git_header_html();
6388         if (defined $home_text && -f $home_text) {
6389                 print "<div class=\"index_include\">\n";
6390                 insert_file($home_text);
6391                 print "</div>\n";
6392         }
6393
6394         git_project_search_form($searchtext, $search_use_regexp);
6395         git_project_list_body(\@list, $order);
6396         git_footer_html();
6397 }
6398
6399 sub git_forks {
6400         my $order = $input_params{'order'};
6401         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6402                 die_error(400, "Unknown order parameter");
6403         }
6404
6405         my $filter = $project;
6406         $filter =~ s/\.git$//;
6407         my @list = git_get_projects_list($filter);
6408         if (!@list) {
6409                 die_error(404, "No forks found");
6410         }
6411
6412         git_header_html();
6413         git_print_page_nav('','');
6414         git_print_header_div('summary', "$project forks");
6415         git_project_list_body(\@list, $order);
6416         git_footer_html();
6417 }
6418
6419 sub git_project_index {
6420         my @projects = git_get_projects_list($project_filter, $strict_export);
6421         if (!@projects) {
6422                 die_error(404, "No projects found");
6423         }
6424
6425         print $cgi->header(
6426                 -type => 'text/plain',
6427                 -charset => 'utf-8',
6428                 -content_disposition => 'inline; filename="index.aux"');
6429
6430         foreach my $pr (@projects) {
6431                 if (!exists $pr->{'owner'}) {
6432                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6433                 }
6434
6435                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6436                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6437                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6438                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6439                 $path  =~ s/ /\+/g;
6440                 $owner =~ s/ /\+/g;
6441
6442                 print "$path $owner\n";
6443         }
6444 }
6445
6446 sub git_summary {
6447         my $descr = git_get_project_description($project) || "none";
6448         my %co = parse_commit("HEAD");
6449         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6450         my $head = $co{'id'};
6451         my $remote_heads = gitweb_check_feature('remote_heads');
6452
6453         my $owner = git_get_project_owner($project);
6454
6455         my $refs = git_get_references();
6456         # These get_*_list functions return one more to allow us to see if
6457         # there are more ...
6458         my @taglist  = git_get_tags_list(16);
6459         my @headlist = git_get_heads_list(16);
6460         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6461         my @forklist;
6462         my $check_forks = gitweb_check_feature('forks');
6463
6464         if ($check_forks) {
6465                 # find forks of a project
6466                 my $filter = $project;
6467                 $filter =~ s/\.git$//;
6468                 @forklist = git_get_projects_list($filter);
6469                 # filter out forks of forks
6470                 @forklist = filter_forks_from_projects_list(\@forklist)
6471                         if (@forklist);
6472         }
6473
6474         git_header_html();
6475         git_print_page_nav('summary','', $head);
6476
6477         print "<div class=\"title\">&nbsp;</div>\n";
6478         print "<table class=\"projects_list\">\n" .
6479               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6480         if ($owner and not $omit_owner) {
6481                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6482         }
6483         if (defined $cd{'rfc2822'}) {
6484                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6485                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6486         }
6487
6488         # use per project git URL list in $projectroot/$project/cloneurl
6489         # or make project git URL from git base URL and project name
6490         my $url_tag = "URL";
6491         my @url_list = git_get_project_url_list($project);
6492         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6493         foreach my $git_url (@url_list) {
6494                 next unless $git_url;
6495                 print format_repo_url($url_tag, $git_url);
6496                 $url_tag = "";
6497         }
6498
6499         # Tag cloud
6500         my $show_ctags = gitweb_check_feature('ctags');
6501         if ($show_ctags) {
6502                 my $ctags = git_get_project_ctags($project);
6503                 if (%$ctags) {
6504                         # without ability to add tags, don't show if there are none
6505                         my $cloud = git_populate_project_tagcloud($ctags);
6506                         print "<tr id=\"metadata_ctags\">" .
6507                               "<td>content tags</td>" .
6508                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6509                               "</tr>\n";
6510                 }
6511         }
6512
6513         print "</table>\n";
6514
6515         # If XSS prevention is on, we don't include README.html.
6516         # TODO: Allow a readme in some safe format.
6517         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6518                 print "<div class=\"title\">readme</div>\n" .
6519                       "<div class=\"readme\">\n";
6520                 insert_file("$projectroot/$project/README.html");
6521                 print "\n</div>\n"; # class="readme"
6522         }
6523
6524         # we need to request one more than 16 (0..15) to check if
6525         # those 16 are all
6526         my @commitlist = $head ? parse_commits($head, 17) : ();
6527         if (@commitlist) {
6528                 git_print_header_div('shortlog');
6529                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6530                                   $#commitlist <=  15 ? undef :
6531                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6532         }
6533
6534         if (@taglist) {
6535                 git_print_header_div('tags');
6536                 git_tags_body(\@taglist, 0, 15,
6537                               $#taglist <=  15 ? undef :
6538                               $cgi->a({-href => href(action=>"tags")}, "..."));
6539         }
6540
6541         if (@headlist) {
6542                 git_print_header_div('heads');
6543                 git_heads_body(\@headlist, $head, 0, 15,
6544                                $#headlist <= 15 ? undef :
6545                                $cgi->a({-href => href(action=>"heads")}, "..."));
6546         }
6547
6548         if (%remotedata) {
6549                 git_print_header_div('remotes');
6550                 git_remotes_body(\%remotedata, 15, $head);
6551         }
6552
6553         if (@forklist) {
6554                 git_print_header_div('forks');
6555                 git_project_list_body(\@forklist, 'age', 0, 15,
6556                                       $#forklist <= 15 ? undef :
6557                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6558                                       'no_header');
6559         }
6560
6561         git_footer_html();
6562 }
6563
6564 sub git_tag {
6565         my %tag = parse_tag($hash);
6566
6567         if (! %tag) {
6568                 die_error(404, "Unknown tag object");
6569         }
6570
6571         my $head = git_get_head_hash($project);
6572         git_header_html();
6573         git_print_page_nav('','', $head,undef,$head);
6574         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6575         print "<div class=\"title_text\">\n" .
6576               "<table class=\"object_header\">\n" .
6577               "<tr>\n" .
6578               "<td>object</td>\n" .
6579               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6580                                $tag{'object'}) . "</td>\n" .
6581               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6582                                               $tag{'type'}) . "</td>\n" .
6583               "</tr>\n";
6584         if (defined($tag{'author'})) {
6585                 git_print_authorship_rows(\%tag, 'author');
6586         }
6587         print "</table>\n\n" .
6588               "</div>\n";
6589         print "<div class=\"page_body\">";
6590         my $comment = $tag{'comment'};
6591         foreach my $line (@$comment) {
6592                 chomp $line;
6593                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6594         }
6595         print "</div>\n";
6596         git_footer_html();
6597 }
6598
6599 sub git_blame_common {
6600         my $format = shift || 'porcelain';
6601         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6602                 $format = 'incremental';
6603                 $action = 'blame_incremental'; # for page title etc
6604         }
6605
6606         # permissions
6607         gitweb_check_feature('blame')
6608                 or die_error(403, "Blame view not allowed");
6609
6610         # error checking
6611         die_error(400, "No file name given") unless $file_name;
6612         $hash_base ||= git_get_head_hash($project);
6613         die_error(404, "Couldn't find base commit") unless $hash_base;
6614         my %co = parse_commit($hash_base)
6615                 or die_error(404, "Commit not found");
6616         my $ftype = "blob";
6617         if (!defined $hash) {
6618                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6619                         or die_error(404, "Error looking up file");
6620         } else {
6621                 $ftype = git_get_type($hash);
6622                 if ($ftype !~ "blob") {
6623                         die_error(400, "Object is not a blob");
6624                 }
6625         }
6626
6627         my $fd;
6628         if ($format eq 'incremental') {
6629                 # get file contents (as base)
6630                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6631                         or die_error(500, "Open git-cat-file failed");
6632         } elsif ($format eq 'data') {
6633                 # run git-blame --incremental
6634                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6635                         $hash_base, "--", $file_name
6636                         or die_error(500, "Open git-blame --incremental failed");
6637         } else {
6638                 # run git-blame --porcelain
6639                 open $fd, "-|", git_cmd(), "blame", '-p',
6640                         $hash_base, '--', $file_name
6641                         or die_error(500, "Open git-blame --porcelain failed");
6642         }
6643         binmode $fd, ':utf8';
6644
6645         # incremental blame data returns early
6646         if ($format eq 'data') {
6647                 print $cgi->header(
6648                         -type=>"text/plain", -charset => "utf-8",
6649                         -status=> "200 OK");
6650                 local $| = 1; # output autoflush
6651                 while (my $line = <$fd>) {
6652                         print to_utf8($line);
6653                 }
6654                 close $fd
6655                         or print "ERROR $!\n";
6656
6657                 print 'END';
6658                 if (defined $t0 && gitweb_check_feature('timed')) {
6659                         print ' '.
6660                               tv_interval($t0, [ gettimeofday() ]).
6661                               ' '.$number_of_git_cmds;
6662                 }
6663                 print "\n";
6664
6665                 return;
6666         }
6667
6668         # page header
6669         git_header_html();
6670         my $formats_nav =
6671                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6672                         "blob") .
6673                 " | ";
6674         if ($format eq 'incremental') {
6675                 $formats_nav .=
6676                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6677                                 "blame") . " (non-incremental)";
6678         } else {
6679                 $formats_nav .=
6680                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6681                                 "blame") . " (incremental)";
6682         }
6683         $formats_nav .=
6684                 " | " .
6685                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6686                         "history") .
6687                 " | " .
6688                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6689                         "HEAD");
6690         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6691         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6692         git_print_page_path($file_name, $ftype, $hash_base);
6693
6694         # page body
6695         if ($format eq 'incremental') {
6696                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6697                       "This page requires JavaScript to run.\n Use ".
6698                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6699                               'this page').
6700                       " instead.\n".
6701                       "</b></center></div>\n</noscript>\n";
6702
6703                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6704         }
6705
6706         print qq!<div class="page_body">\n!;
6707         print qq!<div id="progress_info">... / ...</div>\n!
6708                 if ($format eq 'incremental');
6709         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6710               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6711               qq!<thead>\n!.
6712               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6713               qq!</thead>\n!.
6714               qq!<tbody>\n!;
6715
6716         my @rev_color = qw(light dark);
6717         my $num_colors = scalar(@rev_color);
6718         my $current_color = 0;
6719
6720         if ($format eq 'incremental') {
6721                 my $color_class = $rev_color[$current_color];
6722
6723                 #contents of a file
6724                 my $linenr = 0;
6725         LINE:
6726                 while (my $line = <$fd>) {
6727                         chomp $line;
6728                         $linenr++;
6729
6730                         print qq!<tr id="l$linenr" class="$color_class">!.
6731                               qq!<td class="sha1"><a href=""> </a></td>!.
6732                               qq!<td class="linenr">!.
6733                               qq!<a class="linenr" href="">$linenr</a></td>!;
6734                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6735                         print qq!</tr>\n!;
6736                 }
6737
6738         } else { # porcelain, i.e. ordinary blame
6739                 my %metainfo = (); # saves information about commits
6740
6741                 # blame data
6742         LINE:
6743                 while (my $line = <$fd>) {
6744                         chomp $line;
6745                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6746                         # no <lines in group> for subsequent lines in group of lines
6747                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6748                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6749                         if (!exists $metainfo{$full_rev}) {
6750                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6751                         }
6752                         my $meta = $metainfo{$full_rev};
6753                         my $data;
6754                         while ($data = <$fd>) {
6755                                 chomp $data;
6756                                 last if ($data =~ s/^\t//); # contents of line
6757                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6758                                         $meta->{$1} = $2 unless exists $meta->{$1};
6759                                 }
6760                                 if ($data =~ /^previous /) {
6761                                         $meta->{'nprevious'}++;
6762                                 }
6763                         }
6764                         my $short_rev = substr($full_rev, 0, 8);
6765                         my $author = $meta->{'author'};
6766                         my %date =
6767                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6768                         my $date = $date{'iso-tz'};
6769                         if ($group_size) {
6770                                 $current_color = ($current_color + 1) % $num_colors;
6771                         }
6772                         my $tr_class = $rev_color[$current_color];
6773                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6774                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6775                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6776                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6777                         if ($group_size) {
6778                                 print "<td class=\"sha1\"";
6779                                 print " title=\"". esc_html($author) . ", $date\"";
6780                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6781                                 print ">";
6782                                 print $cgi->a({-href => href(action=>"commit",
6783                                                              hash=>$full_rev,
6784                                                              file_name=>$file_name)},
6785                                               esc_html($short_rev));
6786                                 if ($group_size >= 2) {
6787                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6788                                         if (@author_initials) {
6789                                                 print "<br />" .
6790                                                       esc_html(join('', @author_initials));
6791                                                 #           or join('.', ...)
6792                                         }
6793                                 }
6794                                 print "</td>\n";
6795                         }
6796                         # 'previous' <sha1 of parent commit> <filename at commit>
6797                         if (exists $meta->{'previous'} &&
6798                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6799                                 $meta->{'parent'} = $1;
6800                                 $meta->{'file_parent'} = unquote($2);
6801                         }
6802                         my $linenr_commit =
6803                                 exists($meta->{'parent'}) ?
6804                                 $meta->{'parent'} : $full_rev;
6805                         my $linenr_filename =
6806                                 exists($meta->{'file_parent'}) ?
6807                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6808                         my $blamed = href(action => 'blame',
6809                                           file_name => $linenr_filename,
6810                                           hash_base => $linenr_commit);
6811                         print "<td class=\"linenr\">";
6812                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6813                                         -class => "linenr" },
6814                                       esc_html($lineno));
6815                         print "</td>";
6816                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6817                         print "</tr>\n";
6818                 } # end while
6819
6820         }
6821
6822         # footer
6823         print "</tbody>\n".
6824               "</table>\n"; # class="blame"
6825         print "</div>\n";   # class="blame_body"
6826         close $fd
6827                 or print "Reading blob failed\n";
6828
6829         git_footer_html();
6830 }
6831
6832 sub git_blame {
6833         git_blame_common();
6834 }
6835
6836 sub git_blame_incremental {
6837         git_blame_common('incremental');
6838 }
6839
6840 sub git_blame_data {
6841         git_blame_common('data');
6842 }
6843
6844 sub git_tags {
6845         my $head = git_get_head_hash($project);
6846         git_header_html();
6847         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6848         git_print_header_div('summary', $project);
6849
6850         my @tagslist = git_get_tags_list();
6851         if (@tagslist) {
6852                 git_tags_body(\@tagslist);
6853         }
6854         git_footer_html();
6855 }
6856
6857 sub git_heads {
6858         my $head = git_get_head_hash($project);
6859         git_header_html();
6860         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6861         git_print_header_div('summary', $project);
6862
6863         my @headslist = git_get_heads_list();
6864         if (@headslist) {
6865                 git_heads_body(\@headslist, $head);
6866         }
6867         git_footer_html();
6868 }
6869
6870 # used both for single remote view and for list of all the remotes
6871 sub git_remotes {
6872         gitweb_check_feature('remote_heads')
6873                 or die_error(403, "Remote heads view is disabled");
6874
6875         my $head = git_get_head_hash($project);
6876         my $remote = $input_params{'hash'};
6877
6878         my $remotedata = git_get_remotes_list($remote);
6879         die_error(500, "Unable to get remote information") unless defined $remotedata;
6880
6881         unless (%$remotedata) {
6882                 die_error(404, defined $remote ?
6883                         "Remote $remote not found" :
6884                         "No remotes found");
6885         }
6886
6887         git_header_html(undef, undef, -action_extra => $remote);
6888         git_print_page_nav('', '',  $head, undef, $head,
6889                 format_ref_views($remote ? '' : 'remotes'));
6890
6891         fill_remote_heads($remotedata);
6892         if (defined $remote) {
6893                 git_print_header_div('remotes', "$remote remote for $project");
6894                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6895         } else {
6896                 git_print_header_div('summary', "$project remotes");
6897                 git_remotes_body($remotedata, undef, $head);
6898         }
6899
6900         git_footer_html();
6901 }
6902
6903 sub git_blob_plain {
6904         my $type = shift;
6905         my $expires;
6906
6907         if (!defined $hash) {
6908                 if (defined $file_name) {
6909                         my $base = $hash_base || git_get_head_hash($project);
6910                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6911                                 or die_error(404, "Cannot find file");
6912                 } else {
6913                         die_error(400, "No file name defined");
6914                 }
6915         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6916                 # blobs defined by non-textual hash id's can be cached
6917                 $expires = "+1d";
6918         }
6919
6920         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6921                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6922
6923         # content-type (can include charset)
6924         $type = blob_contenttype($fd, $file_name, $type);
6925
6926         # "save as" filename, even when no $file_name is given
6927         my $save_as = "$hash";
6928         if (defined $file_name) {
6929                 $save_as = $file_name;
6930         } elsif ($type =~ m/^text\//) {
6931                 $save_as .= '.txt';
6932         }
6933
6934         # With XSS prevention on, blobs of all types except a few known safe
6935         # ones are served with "Content-Disposition: attachment" to make sure
6936         # they don't run in our security domain.  For certain image types,
6937         # blob view writes an <img> tag referring to blob_plain view, and we
6938         # want to be sure not to break that by serving the image as an
6939         # attachment (though Firefox 3 doesn't seem to care).
6940         my $sandbox = $prevent_xss &&
6941                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
6942
6943         # serve text/* as text/plain
6944         if ($prevent_xss &&
6945             ($type =~ m!^text/[a-z]+\b(.*)$! ||
6946              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
6947                 my $rest = $1;
6948                 $rest = defined $rest ? $rest : '';
6949                 $type = "text/plain$rest";
6950         }
6951
6952         print $cgi->header(
6953                 -type => $type,
6954                 -expires => $expires,
6955                 -content_disposition =>
6956                         ($sandbox ? 'attachment' : 'inline')
6957                         . '; filename="' . $save_as . '"');
6958         local $/ = undef;
6959         binmode STDOUT, ':raw';
6960         print <$fd>;
6961         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6962         close $fd;
6963 }
6964
6965 sub git_blob {
6966         my $expires;
6967
6968         if (!defined $hash) {
6969                 if (defined $file_name) {
6970                         my $base = $hash_base || git_get_head_hash($project);
6971                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6972                                 or die_error(404, "Cannot find file");
6973                 } else {
6974                         die_error(400, "No file name defined");
6975                 }
6976         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6977                 # blobs defined by non-textual hash id's can be cached
6978                 $expires = "+1d";
6979         }
6980
6981         my $have_blame = gitweb_check_feature('blame');
6982         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6983                 or die_error(500, "Couldn't cat $file_name, $hash");
6984         my $mimetype = blob_mimetype($fd, $file_name);
6985         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
6986         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
6987                 close $fd;
6988                 return git_blob_plain($mimetype);
6989         }
6990         # we can have blame only for text/* mimetype
6991         $have_blame &&= ($mimetype =~ m!^text/!);
6992
6993         my $highlight = gitweb_check_feature('highlight');
6994         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
6995         $fd = run_highlighter($fd, $highlight, $syntax)
6996                 if $syntax;
6997
6998         git_header_html(undef, $expires);
6999         my $formats_nav = '';
7000         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7001                 if (defined $file_name) {
7002                         if ($have_blame) {
7003                                 $formats_nav .=
7004                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7005                                                 "blame") .
7006                                         " | ";
7007                         }
7008                         $formats_nav .=
7009                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7010                                         "history") .
7011                                 " | " .
7012                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7013                                         "raw") .
7014                                 " | " .
7015                                 $cgi->a({-href => href(action=>"blob",
7016                                                        hash_base=>"HEAD", file_name=>$file_name)},
7017                                         "HEAD");
7018                 } else {
7019                         $formats_nav .=
7020                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7021                                         "raw");
7022                 }
7023                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7024                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7025         } else {
7026                 print "<div class=\"page_nav\">\n" .
7027                       "<br/><br/></div>\n" .
7028                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7029         }
7030         git_print_page_path($file_name, "blob", $hash_base);
7031         print "<div class=\"page_body\">\n";
7032         if ($mimetype =~ m!^image/!) {
7033                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
7034                 if ($file_name) {
7035                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7036                 }
7037                 print qq! src="! .
7038                       href(action=>"blob_plain", hash=>$hash,
7039                            hash_base=>$hash_base, file_name=>$file_name) .
7040                       qq!" />\n!;
7041         } else {
7042                 my $nr;
7043                 while (my $line = <$fd>) {
7044                         chomp $line;
7045                         $nr++;
7046                         $line = untabify($line);
7047                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7048                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7049                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7050                 }
7051         }
7052         close $fd
7053                 or print "Reading blob failed.\n";
7054         print "</div>";
7055         git_footer_html();
7056 }
7057
7058 sub git_tree {
7059         if (!defined $hash_base) {
7060                 $hash_base = "HEAD";
7061         }
7062         if (!defined $hash) {
7063                 if (defined $file_name) {
7064                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7065                 } else {
7066                         $hash = $hash_base;
7067                 }
7068         }
7069         die_error(404, "No such tree") unless defined($hash);
7070
7071         my $show_sizes = gitweb_check_feature('show-sizes');
7072         my $have_blame = gitweb_check_feature('blame');
7073
7074         my @entries = ();
7075         {
7076                 local $/ = "\0";
7077                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7078                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7079                         or die_error(500, "Open git-ls-tree failed");
7080                 @entries = map { chomp; $_ } <$fd>;
7081                 close $fd
7082                         or die_error(404, "Reading tree failed");
7083         }
7084
7085         my $refs = git_get_references();
7086         my $ref = format_ref_marker($refs, $hash_base);
7087         git_header_html();
7088         my $basedir = '';
7089         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7090                 my @views_nav = ();
7091                 if (defined $file_name) {
7092                         push @views_nav,
7093                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7094                                         "history"),
7095                                 $cgi->a({-href => href(action=>"tree",
7096                                                        hash_base=>"HEAD", file_name=>$file_name)},
7097                                         "HEAD"),
7098                 }
7099                 my $snapshot_links = format_snapshot_links($hash);
7100                 if (defined $snapshot_links) {
7101                         # FIXME: Should be available when we have no hash base as well.
7102                         push @views_nav, $snapshot_links;
7103                 }
7104                 git_print_page_nav('tree','', $hash_base, undef, undef,
7105                                    join(' | ', @views_nav));
7106                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7107         } else {
7108                 undef $hash_base;
7109                 print "<div class=\"page_nav\">\n";
7110                 print "<br/><br/></div>\n";
7111                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7112         }
7113         if (defined $file_name) {
7114                 $basedir = $file_name;
7115                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7116                         $basedir .= '/';
7117                 }
7118                 git_print_page_path($file_name, 'tree', $hash_base);
7119         }
7120         print "<div class=\"page_body\">\n";
7121         print "<table class=\"tree\">\n";
7122         my $alternate = 1;
7123         # '..' (top directory) link if possible
7124         if (defined $hash_base &&
7125             defined $file_name && $file_name =~ m![^/]+$!) {
7126                 if ($alternate) {
7127                         print "<tr class=\"dark\">\n";
7128                 } else {
7129                         print "<tr class=\"light\">\n";
7130                 }
7131                 $alternate ^= 1;
7132
7133                 my $up = $file_name;
7134                 $up =~ s!/?[^/]+$!!;
7135                 undef $up unless $up;
7136                 # based on git_print_tree_entry
7137                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7138                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7139                 print '<td class="list">';
7140                 print $cgi->a({-href => href(action=>"tree",
7141                                              hash_base=>$hash_base,
7142                                              file_name=>$up)},
7143                               "..");
7144                 print "</td>\n";
7145                 print "<td class=\"link\"></td>\n";
7146
7147                 print "</tr>\n";
7148         }
7149         foreach my $line (@entries) {
7150                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7151
7152                 if ($alternate) {
7153                         print "<tr class=\"dark\">\n";
7154                 } else {
7155                         print "<tr class=\"light\">\n";
7156                 }
7157                 $alternate ^= 1;
7158
7159                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7160
7161                 print "</tr>\n";
7162         }
7163         print "</table>\n" .
7164               "</div>";
7165         git_footer_html();
7166 }
7167
7168 sub snapshot_name {
7169         my ($project, $hash) = @_;
7170
7171         # path/to/project.git  -> project
7172         # path/to/project/.git -> project
7173         my $name = to_utf8($project);
7174         $name =~ s,([^/])/*\.git$,$1,;
7175         $name = basename($name);
7176         # sanitize name
7177         $name =~ s/[[:cntrl:]]/?/g;
7178
7179         my $ver = $hash;
7180         if ($hash =~ /^[0-9a-fA-F]+$/) {
7181                 # shorten SHA-1 hash
7182                 my $full_hash = git_get_full_hash($project, $hash);
7183                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7184                         $ver = git_get_short_hash($project, $hash);
7185                 }
7186         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7187                 # tags don't need shortened SHA-1 hash
7188                 $ver = $1;
7189         } else {
7190                 # branches and other need shortened SHA-1 hash
7191                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
7192                         $ver = $1;
7193                 }
7194                 $ver .= '-' . git_get_short_hash($project, $hash);
7195         }
7196         # in case of hierarchical branch names
7197         $ver =~ s!/!.!g;
7198
7199         # name = project-version_string
7200         $name = "$name-$ver";
7201
7202         return wantarray ? ($name, $name) : $name;
7203 }
7204
7205 sub exit_if_unmodified_since {
7206         my ($latest_epoch) = @_;
7207         our $cgi;
7208
7209         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7210         if (defined $if_modified) {
7211                 my $since;
7212                 if (eval { require HTTP::Date; 1; }) {
7213                         $since = HTTP::Date::str2time($if_modified);
7214                 } elsif (eval { require Time::ParseDate; 1; }) {
7215                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7216                 }
7217                 if (defined $since && $latest_epoch <= $since) {
7218                         my %latest_date = parse_date($latest_epoch);
7219                         print $cgi->header(
7220                                 -last_modified => $latest_date{'rfc2822'},
7221                                 -status => '304 Not Modified');
7222                         goto DONE_GITWEB;
7223                 }
7224         }
7225 }
7226
7227 sub git_snapshot {
7228         my $format = $input_params{'snapshot_format'};
7229         if (!@snapshot_fmts) {
7230                 die_error(403, "Snapshots not allowed");
7231         }
7232         # default to first supported snapshot format
7233         $format ||= $snapshot_fmts[0];
7234         if ($format !~ m/^[a-z0-9]+$/) {
7235                 die_error(400, "Invalid snapshot format parameter");
7236         } elsif (!exists($known_snapshot_formats{$format})) {
7237                 die_error(400, "Unknown snapshot format");
7238         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7239                 die_error(403, "Snapshot format not allowed");
7240         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7241                 die_error(403, "Unsupported snapshot format");
7242         }
7243
7244         my $type = git_get_type("$hash^{}");
7245         if (!$type) {
7246                 die_error(404, 'Object does not exist');
7247         }  elsif ($type eq 'blob') {
7248                 die_error(400, 'Object is not a tree-ish');
7249         }
7250
7251         my ($name, $prefix) = snapshot_name($project, $hash);
7252         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7253
7254         my %co = parse_commit($hash);
7255         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7256
7257         my $cmd = quote_command(
7258                 git_cmd(), 'archive',
7259                 "--format=$known_snapshot_formats{$format}{'format'}",
7260                 "--prefix=$prefix/", $hash);
7261         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7262                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7263         }
7264
7265         $filename =~ s/(["\\])/\\$1/g;
7266         my %latest_date;
7267         if (%co) {
7268                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7269         }
7270
7271         print $cgi->header(
7272                 -type => $known_snapshot_formats{$format}{'type'},
7273                 -content_disposition => 'inline; filename="' . $filename . '"',
7274                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7275                 -status => '200 OK');
7276
7277         open my $fd, "-|", $cmd
7278                 or die_error(500, "Execute git-archive failed");
7279         binmode STDOUT, ':raw';
7280         print <$fd>;
7281         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7282         close $fd;
7283 }
7284
7285 sub git_log_generic {
7286         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7287
7288         my $head = git_get_head_hash($project);
7289         if (!defined $base) {
7290                 $base = $head;
7291         }
7292         if (!defined $page) {
7293                 $page = 0;
7294         }
7295         my $refs = git_get_references();
7296
7297         my $commit_hash = $base;
7298         if (defined $parent) {
7299                 $commit_hash = "$parent..$base";
7300         }
7301         my @commitlist =
7302                 parse_commits($commit_hash, 101, (100 * $page),
7303                               defined $file_name ? ($file_name, "--full-history") : ());
7304
7305         my $ftype;
7306         if (!defined $file_hash && defined $file_name) {
7307                 # some commits could have deleted file in question,
7308                 # and not have it in tree, but one of them has to have it
7309                 for (my $i = 0; $i < @commitlist; $i++) {
7310                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7311                         last if defined $file_hash;
7312                 }
7313         }
7314         if (defined $file_hash) {
7315                 $ftype = git_get_type($file_hash);
7316         }
7317         if (defined $file_name && !defined $ftype) {
7318                 die_error(500, "Unknown type of object");
7319         }
7320         my %co;
7321         if (defined $file_name) {
7322                 %co = parse_commit($base)
7323                         or die_error(404, "Unknown commit object");
7324         }
7325
7326
7327         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7328         my $next_link = '';
7329         if ($#commitlist >= 100) {
7330                 $next_link =
7331                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7332                                  -accesskey => "n", -title => "Alt-n"}, "next");
7333         }
7334         my $patch_max = gitweb_get_feature('patches');
7335         if ($patch_max && !defined $file_name) {
7336                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7337                         $paging_nav .= " &sdot; " .
7338                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7339                                         "patches");
7340                 }
7341         }
7342
7343         git_header_html();
7344         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7345         if (defined $file_name) {
7346                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7347         } else {
7348                 git_print_header_div('summary', $project)
7349         }
7350         git_print_page_path($file_name, $ftype, $hash_base)
7351                 if (defined $file_name);
7352
7353         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7354                      $file_name, $file_hash, $ftype);
7355
7356         git_footer_html();
7357 }
7358
7359 sub git_log {
7360         git_log_generic('log', \&git_log_body,
7361                         $hash, $hash_parent);
7362 }
7363
7364 sub git_commit {
7365         $hash ||= $hash_base || "HEAD";
7366         my %co = parse_commit($hash)
7367             or die_error(404, "Unknown commit object");
7368
7369         my $parent  = $co{'parent'};
7370         my $parents = $co{'parents'}; # listref
7371
7372         # we need to prepare $formats_nav before any parameter munging
7373         my $formats_nav;
7374         if (!defined $parent) {
7375                 # --root commitdiff
7376                 $formats_nav .= '(initial)';
7377         } elsif (@$parents == 1) {
7378                 # single parent commit
7379                 $formats_nav .=
7380                         '(parent: ' .
7381                         $cgi->a({-href => href(action=>"commit",
7382                                                hash=>$parent)},
7383                                 esc_html(substr($parent, 0, 7))) .
7384                         ')';
7385         } else {
7386                 # merge commit
7387                 $formats_nav .=
7388                         '(merge: ' .
7389                         join(' ', map {
7390                                 $cgi->a({-href => href(action=>"commit",
7391                                                        hash=>$_)},
7392                                         esc_html(substr($_, 0, 7)));
7393                         } @$parents ) .
7394                         ')';
7395         }
7396         if (gitweb_check_feature('patches') && @$parents <= 1) {
7397                 $formats_nav .= " | " .
7398                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7399                                 "patch");
7400         }
7401
7402         if (!defined $parent) {
7403                 $parent = "--root";
7404         }
7405         my @difftree;
7406         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7407                 @diff_opts,
7408                 (@$parents <= 1 ? $parent : '-c'),
7409                 $hash, "--"
7410                 or die_error(500, "Open git-diff-tree failed");
7411         @difftree = map { chomp; $_ } <$fd>;
7412         close $fd or die_error(404, "Reading git-diff-tree failed");
7413
7414         # non-textual hash id's can be cached
7415         my $expires;
7416         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7417                 $expires = "+1d";
7418         }
7419         my $refs = git_get_references();
7420         my $ref = format_ref_marker($refs, $co{'id'});
7421
7422         git_header_html(undef, $expires);
7423         git_print_page_nav('commit', '',
7424                            $hash, $co{'tree'}, $hash,
7425                            $formats_nav);
7426
7427         if (defined $co{'parent'}) {
7428                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7429         } else {
7430                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7431         }
7432         print "<div class=\"title_text\">\n" .
7433               "<table class=\"object_header\">\n";
7434         git_print_authorship_rows(\%co);
7435         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7436         print "<tr>" .
7437               "<td>tree</td>" .
7438               "<td class=\"sha1\">" .
7439               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7440                        class => "list"}, $co{'tree'}) .
7441               "</td>" .
7442               "<td class=\"link\">" .
7443               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7444                       "tree");
7445         my $snapshot_links = format_snapshot_links($hash);
7446         if (defined $snapshot_links) {
7447                 print " | " . $snapshot_links;
7448         }
7449         print "</td>" .
7450               "</tr>\n";
7451
7452         foreach my $par (@$parents) {
7453                 print "<tr>" .
7454                       "<td>parent</td>" .
7455                       "<td class=\"sha1\">" .
7456                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7457                                class => "list"}, $par) .
7458                       "</td>" .
7459                       "<td class=\"link\">" .
7460                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7461                       " | " .
7462                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7463                       "</td>" .
7464                       "</tr>\n";
7465         }
7466         print "</table>".
7467               "</div>\n";
7468
7469         print "<div class=\"page_body\">\n";
7470         git_print_log($co{'comment'});
7471         print "</div>\n";
7472
7473         git_difftree_body(\@difftree, $hash, @$parents);
7474
7475         git_footer_html();
7476 }
7477
7478 sub git_object {
7479         # object is defined by:
7480         # - hash or hash_base alone
7481         # - hash_base and file_name
7482         my $type;
7483
7484         # - hash or hash_base alone
7485         if ($hash || ($hash_base && !defined $file_name)) {
7486                 my $object_id = $hash || $hash_base;
7487
7488                 open my $fd, "-|", quote_command(
7489                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7490                         or die_error(404, "Object does not exist");
7491                 $type = <$fd>;
7492                 chomp $type;
7493                 close $fd
7494                         or die_error(404, "Object does not exist");
7495
7496         # - hash_base and file_name
7497         } elsif ($hash_base && defined $file_name) {
7498                 $file_name =~ s,/+$,,;
7499
7500                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7501                         or die_error(404, "Base object does not exist");
7502
7503                 # here errors should not happen
7504                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7505                         or die_error(500, "Open git-ls-tree failed");
7506                 my $line = <$fd>;
7507                 close $fd;
7508
7509                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7510                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7511                         die_error(404, "File or directory for given base does not exist");
7512                 }
7513                 $type = $2;
7514                 $hash = $3;
7515         } else {
7516                 die_error(400, "Not enough information to find object");
7517         }
7518
7519         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7520                                           hash=>$hash, hash_base=>$hash_base,
7521                                           file_name=>$file_name),
7522                              -status => '302 Found');
7523 }
7524
7525 sub git_blobdiff {
7526         my $format = shift || 'html';
7527         my $diff_style = $input_params{'diff_style'} || 'inline';
7528
7529         my $fd;
7530         my @difftree;
7531         my %diffinfo;
7532         my $expires;
7533
7534         # preparing $fd and %diffinfo for git_patchset_body
7535         # new style URI
7536         if (defined $hash_base && defined $hash_parent_base) {
7537                 if (defined $file_name) {
7538                         # read raw output
7539                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7540                                 $hash_parent_base, $hash_base,
7541                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7542                                 or die_error(500, "Open git-diff-tree failed");
7543                         @difftree = map { chomp; $_ } <$fd>;
7544                         close $fd
7545                                 or die_error(404, "Reading git-diff-tree failed");
7546                         @difftree
7547                                 or die_error(404, "Blob diff not found");
7548
7549                 } elsif (defined $hash &&
7550                          $hash =~ /[0-9a-fA-F]{40}/) {
7551                         # try to find filename from $hash
7552
7553                         # read filtered raw output
7554                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7555                                 $hash_parent_base, $hash_base, "--"
7556                                 or die_error(500, "Open git-diff-tree failed");
7557                         @difftree =
7558                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7559                                 # $hash == to_id
7560                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7561                                 map { chomp; $_ } <$fd>;
7562                         close $fd
7563                                 or die_error(404, "Reading git-diff-tree failed");
7564                         @difftree
7565                                 or die_error(404, "Blob diff not found");
7566
7567                 } else {
7568                         die_error(400, "Missing one of the blob diff parameters");
7569                 }
7570
7571                 if (@difftree > 1) {
7572                         die_error(400, "Ambiguous blob diff specification");
7573                 }
7574
7575                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7576                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7577                 $file_name   ||= $diffinfo{'to_file'};
7578
7579                 $hash_parent ||= $diffinfo{'from_id'};
7580                 $hash        ||= $diffinfo{'to_id'};
7581
7582                 # non-textual hash id's can be cached
7583                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7584                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7585                         $expires = '+1d';
7586                 }
7587
7588                 # open patch output
7589                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7590                         '-p', ($format eq 'html' ? "--full-index" : ()),
7591                         $hash_parent_base, $hash_base,
7592                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7593                         or die_error(500, "Open git-diff-tree failed");
7594         }
7595
7596         # old/legacy style URI -- not generated anymore since 1.4.3.
7597         if (!%diffinfo) {
7598                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7599         }
7600
7601         # header
7602         if ($format eq 'html') {
7603                 my $formats_nav =
7604                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7605                                 "raw");
7606                 $formats_nav .= diff_style_nav($diff_style);
7607                 git_header_html(undef, $expires);
7608                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7609                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7610                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7611                 } else {
7612                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7613                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7614                 }
7615                 if (defined $file_name) {
7616                         git_print_page_path($file_name, "blob", $hash_base);
7617                 } else {
7618                         print "<div class=\"page_path\"></div>\n";
7619                 }
7620
7621         } elsif ($format eq 'plain') {
7622                 print $cgi->header(
7623                         -type => 'text/plain',
7624                         -charset => 'utf-8',
7625                         -expires => $expires,
7626                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7627
7628                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7629
7630         } else {
7631                 die_error(400, "Unknown blobdiff format");
7632         }
7633
7634         # patch
7635         if ($format eq 'html') {
7636                 print "<div class=\"page_body\">\n";
7637
7638                 git_patchset_body($fd, $diff_style,
7639                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7640                 close $fd;
7641
7642                 print "</div>\n"; # class="page_body"
7643                 git_footer_html();
7644
7645         } else {
7646                 while (my $line = <$fd>) {
7647                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7648                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7649
7650                         print $line;
7651
7652                         last if $line =~ m!^\+\+\+!;
7653                 }
7654                 local $/ = undef;
7655                 print <$fd>;
7656                 close $fd;
7657         }
7658 }
7659
7660 sub git_blobdiff_plain {
7661         git_blobdiff('plain');
7662 }
7663
7664 # assumes that it is added as later part of already existing navigation,
7665 # so it returns "| foo | bar" rather than just "foo | bar"
7666 sub diff_style_nav {
7667         my ($diff_style, $is_combined) = @_;
7668         $diff_style ||= 'inline';
7669
7670         return "" if ($is_combined);
7671
7672         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7673         my %styles = @styles;
7674         @styles =
7675                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7676
7677         return join '',
7678                 map { " | ".$_ }
7679                 map {
7680                         $_ eq $diff_style ? $styles{$_} :
7681                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7682                 } @styles;
7683 }
7684
7685 sub git_commitdiff {
7686         my %params = @_;
7687         my $format = $params{-format} || 'html';
7688         my $diff_style = $input_params{'diff_style'} || 'inline';
7689
7690         my ($patch_max) = gitweb_get_feature('patches');
7691         if ($format eq 'patch') {
7692                 die_error(403, "Patch view not allowed") unless $patch_max;
7693         }
7694
7695         $hash ||= $hash_base || "HEAD";
7696         my %co = parse_commit($hash)
7697             or die_error(404, "Unknown commit object");
7698
7699         # choose format for commitdiff for merge
7700         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7701                 $hash_parent = '--cc';
7702         }
7703         # we need to prepare $formats_nav before almost any parameter munging
7704         my $formats_nav;
7705         if ($format eq 'html') {
7706                 $formats_nav =
7707                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7708                                 "raw");
7709                 if ($patch_max && @{$co{'parents'}} <= 1) {
7710                         $formats_nav .= " | " .
7711                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7712                                         "patch");
7713                 }
7714                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7715
7716                 if (defined $hash_parent &&
7717                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7718                         # commitdiff with two commits given
7719                         my $hash_parent_short = $hash_parent;
7720                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7721                                 $hash_parent_short = substr($hash_parent, 0, 7);
7722                         }
7723                         $formats_nav .=
7724                                 ' (from';
7725                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7726                                 if ($co{'parents'}[$i] eq $hash_parent) {
7727                                         $formats_nav .= ' parent ' . ($i+1);
7728                                         last;
7729                                 }
7730                         }
7731                         $formats_nav .= ': ' .
7732                                 $cgi->a({-href => href(-replay=>1,
7733                                                        hash=>$hash_parent, hash_base=>undef)},
7734                                         esc_html($hash_parent_short)) .
7735                                 ')';
7736                 } elsif (!$co{'parent'}) {
7737                         # --root commitdiff
7738                         $formats_nav .= ' (initial)';
7739                 } elsif (scalar @{$co{'parents'}} == 1) {
7740                         # single parent commit
7741                         $formats_nav .=
7742                                 ' (parent: ' .
7743                                 $cgi->a({-href => href(-replay=>1,
7744                                                        hash=>$co{'parent'}, hash_base=>undef)},
7745                                         esc_html(substr($co{'parent'}, 0, 7))) .
7746                                 ')';
7747                 } else {
7748                         # merge commit
7749                         if ($hash_parent eq '--cc') {
7750                                 $formats_nav .= ' | ' .
7751                                         $cgi->a({-href => href(-replay=>1,
7752                                                                hash=>$hash, hash_parent=>'-c')},
7753                                                 'combined');
7754                         } else { # $hash_parent eq '-c'
7755                                 $formats_nav .= ' | ' .
7756                                         $cgi->a({-href => href(-replay=>1,
7757                                                                hash=>$hash, hash_parent=>'--cc')},
7758                                                 'compact');
7759                         }
7760                         $formats_nav .=
7761                                 ' (merge: ' .
7762                                 join(' ', map {
7763                                         $cgi->a({-href => href(-replay=>1,
7764                                                                hash=>$_, hash_base=>undef)},
7765                                                 esc_html(substr($_, 0, 7)));
7766                                 } @{$co{'parents'}} ) .
7767                                 ')';
7768                 }
7769         }
7770
7771         my $hash_parent_param = $hash_parent;
7772         if (!defined $hash_parent_param) {
7773                 # --cc for multiple parents, --root for parentless
7774                 $hash_parent_param =
7775                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7776         }
7777
7778         # read commitdiff
7779         my $fd;
7780         my @difftree;
7781         if ($format eq 'html') {
7782                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7783                         "--no-commit-id", "--patch-with-raw", "--full-index",
7784                         $hash_parent_param, $hash, "--"
7785                         or die_error(500, "Open git-diff-tree failed");
7786
7787                 while (my $line = <$fd>) {
7788                         chomp $line;
7789                         # empty line ends raw part of diff-tree output
7790                         last unless $line;
7791                         push @difftree, scalar parse_difftree_raw_line($line);
7792                 }
7793
7794         } elsif ($format eq 'plain') {
7795                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7796                         '-p', $hash_parent_param, $hash, "--"
7797                         or die_error(500, "Open git-diff-tree failed");
7798         } elsif ($format eq 'patch') {
7799                 # For commit ranges, we limit the output to the number of
7800                 # patches specified in the 'patches' feature.
7801                 # For single commits, we limit the output to a single patch,
7802                 # diverging from the git-format-patch default.
7803                 my @commit_spec = ();
7804                 if ($hash_parent) {
7805                         if ($patch_max > 0) {
7806                                 push @commit_spec, "-$patch_max";
7807                         }
7808                         push @commit_spec, '-n', "$hash_parent..$hash";
7809                 } else {
7810                         if ($params{-single}) {
7811                                 push @commit_spec, '-1';
7812                         } else {
7813                                 if ($patch_max > 0) {
7814                                         push @commit_spec, "-$patch_max";
7815                                 }
7816                                 push @commit_spec, "-n";
7817                         }
7818                         push @commit_spec, '--root', $hash;
7819                 }
7820                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7821                         '--encoding=utf8', '--stdout', @commit_spec
7822                         or die_error(500, "Open git-format-patch failed");
7823         } else {
7824                 die_error(400, "Unknown commitdiff format");
7825         }
7826
7827         # non-textual hash id's can be cached
7828         my $expires;
7829         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7830                 $expires = "+1d";
7831         }
7832
7833         # write commit message
7834         if ($format eq 'html') {
7835                 my $refs = git_get_references();
7836                 my $ref = format_ref_marker($refs, $co{'id'});
7837
7838                 git_header_html(undef, $expires);
7839                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7840                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7841                 print "<div class=\"title_text\">\n" .
7842                       "<table class=\"object_header\">\n";
7843                 git_print_authorship_rows(\%co);
7844                 print "</table>".
7845                       "</div>\n";
7846                 print "<div class=\"page_body\">\n";
7847                 if (@{$co{'comment'}} > 1) {
7848                         print "<div class=\"log\">\n";
7849                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7850                         print "</div>\n"; # class="log"
7851                 }
7852
7853         } elsif ($format eq 'plain') {
7854                 my $refs = git_get_references("tags");
7855                 my $tagname = git_get_rev_name_tags($hash);
7856                 my $filename = basename($project) . "-$hash.patch";
7857
7858                 print $cgi->header(
7859                         -type => 'text/plain',
7860                         -charset => 'utf-8',
7861                         -expires => $expires,
7862                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7863                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7864                 print "From: " . to_utf8($co{'author'}) . "\n";
7865                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7866                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7867
7868                 print "X-Git-Tag: $tagname\n" if $tagname;
7869                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7870
7871                 foreach my $line (@{$co{'comment'}}) {
7872                         print to_utf8($line) . "\n";
7873                 }
7874                 print "---\n\n";
7875         } elsif ($format eq 'patch') {
7876                 my $filename = basename($project) . "-$hash.patch";
7877
7878                 print $cgi->header(
7879                         -type => 'text/plain',
7880                         -charset => 'utf-8',
7881                         -expires => $expires,
7882                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7883         }
7884
7885         # write patch
7886         if ($format eq 'html') {
7887                 my $use_parents = !defined $hash_parent ||
7888                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7889                 git_difftree_body(\@difftree, $hash,
7890                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7891                 print "<br/>\n";
7892
7893                 git_patchset_body($fd, $diff_style,
7894                                   \@difftree, $hash,
7895                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7896                 close $fd;
7897                 print "</div>\n"; # class="page_body"
7898                 git_footer_html();
7899
7900         } elsif ($format eq 'plain') {
7901                 local $/ = undef;
7902                 print <$fd>;
7903                 close $fd
7904                         or print "Reading git-diff-tree failed\n";
7905         } elsif ($format eq 'patch') {
7906                 local $/ = undef;
7907                 print <$fd>;
7908                 close $fd
7909                         or print "Reading git-format-patch failed\n";
7910         }
7911 }
7912
7913 sub git_commitdiff_plain {
7914         git_commitdiff(-format => 'plain');
7915 }
7916
7917 # format-patch-style patches
7918 sub git_patch {
7919         git_commitdiff(-format => 'patch', -single => 1);
7920 }
7921
7922 sub git_patches {
7923         git_commitdiff(-format => 'patch');
7924 }
7925
7926 sub git_history {
7927         git_log_generic('history', \&git_history_body,
7928                         $hash_base, $hash_parent_base,
7929                         $file_name, $hash);
7930 }
7931
7932 sub git_search {
7933         $searchtype ||= 'commit';
7934
7935         # check if appropriate features are enabled
7936         gitweb_check_feature('search')
7937                 or die_error(403, "Search is disabled");
7938         if ($searchtype eq 'pickaxe') {
7939                 # pickaxe may take all resources of your box and run for several minutes
7940                 # with every query - so decide by yourself how public you make this feature
7941                 gitweb_check_feature('pickaxe')
7942                         or die_error(403, "Pickaxe search is disabled");
7943         }
7944         if ($searchtype eq 'grep') {
7945                 # grep search might be potentially CPU-intensive, too
7946                 gitweb_check_feature('grep')
7947                         or die_error(403, "Grep search is disabled");
7948         }
7949
7950         if (!defined $searchtext) {
7951                 die_error(400, "Text field is empty");
7952         }
7953         if (!defined $hash) {
7954                 $hash = git_get_head_hash($project);
7955         }
7956         my %co = parse_commit($hash);
7957         if (!%co) {
7958                 die_error(404, "Unknown commit object");
7959         }
7960         if (!defined $page) {
7961                 $page = 0;
7962         }
7963
7964         if ($searchtype eq 'commit' ||
7965             $searchtype eq 'author' ||
7966             $searchtype eq 'committer') {
7967                 git_search_message(%co);
7968         } elsif ($searchtype eq 'pickaxe') {
7969                 git_search_changes(%co);
7970         } elsif ($searchtype eq 'grep') {
7971                 git_search_files(%co);
7972         } else {
7973                 die_error(400, "Unknown search type");
7974         }
7975 }
7976
7977 sub git_search_help {
7978         git_header_html();
7979         git_print_page_nav('','', $hash,$hash,$hash);
7980         print <<EOT;
7981 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7982 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7983 the pattern entered is recognized as the POSIX extended
7984 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7985 insensitive).</p>
7986 <dl>
7987 <dt><b>commit</b></dt>
7988 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7989 EOT
7990         my $have_grep = gitweb_check_feature('grep');
7991         if ($have_grep) {
7992                 print <<EOT;
7993 <dt><b>grep</b></dt>
7994 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7995     a different one) are searched for the given pattern. On large trees, this search can take
7996 a while and put some strain on the server, so please use it with some consideration. Note that
7997 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7998 case-sensitive.</dd>
7999 EOT
8000         }
8001         print <<EOT;
8002 <dt><b>author</b></dt>
8003 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8004 <dt><b>committer</b></dt>
8005 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8006 EOT
8007         my $have_pickaxe = gitweb_check_feature('pickaxe');
8008         if ($have_pickaxe) {
8009                 print <<EOT;
8010 <dt><b>pickaxe</b></dt>
8011 <dd>All commits that caused the string to appear or disappear from any file (changes that
8012 added, removed or "modified" the string) will be listed. This search can take a while and
8013 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8014 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8015 EOT
8016         }
8017         print "</dl>\n";
8018         git_footer_html();
8019 }
8020
8021 sub git_shortlog {
8022         git_log_generic('shortlog', \&git_shortlog_body,
8023                         $hash, $hash_parent);
8024 }
8025
8026 ## ......................................................................
8027 ## feeds (RSS, Atom; OPML)
8028
8029 sub git_feed {
8030         my $format = shift || 'atom';
8031         my $have_blame = gitweb_check_feature('blame');
8032
8033         # Atom: http://www.atomenabled.org/developers/syndication/
8034         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8035         if ($format ne 'rss' && $format ne 'atom') {
8036                 die_error(400, "Unknown web feed format");
8037         }
8038
8039         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8040         my $head = $hash || 'HEAD';
8041         my @commitlist = parse_commits($head, 150, 0, $file_name);
8042
8043         my %latest_commit;
8044         my %latest_date;
8045         my $content_type = "application/$format+xml";
8046         if (defined $cgi->http('HTTP_ACCEPT') &&
8047                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8048                 # browser (feed reader) prefers text/xml
8049                 $content_type = 'text/xml';
8050         }
8051         if (defined($commitlist[0])) {
8052                 %latest_commit = %{$commitlist[0]};
8053                 my $latest_epoch = $latest_commit{'committer_epoch'};
8054                 exit_if_unmodified_since($latest_epoch);
8055                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8056         }
8057         print $cgi->header(
8058                 -type => $content_type,
8059                 -charset => 'utf-8',
8060                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8061                 -status => '200 OK');
8062
8063         # Optimization: skip generating the body if client asks only
8064         # for Last-Modified date.
8065         return if ($cgi->request_method() eq 'HEAD');
8066
8067         # header variables
8068         my $title = "$site_name - $project/$action";
8069         my $feed_type = 'log';
8070         if (defined $hash) {
8071                 $title .= " - '$hash'";
8072                 $feed_type = 'branch log';
8073                 if (defined $file_name) {
8074                         $title .= " :: $file_name";
8075                         $feed_type = 'history';
8076                 }
8077         } elsif (defined $file_name) {
8078                 $title .= " - $file_name";
8079                 $feed_type = 'history';
8080         }
8081         $title .= " $feed_type";
8082         $title = esc_html($title);
8083         my $descr = git_get_project_description($project);
8084         if (defined $descr) {
8085                 $descr = esc_html($descr);
8086         } else {
8087                 $descr = "$project " .
8088                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8089                          " feed";
8090         }
8091         my $owner = git_get_project_owner($project);
8092         $owner = esc_html($owner);
8093
8094         #header
8095         my $alt_url;
8096         if (defined $file_name) {
8097                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8098         } elsif (defined $hash) {
8099                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8100         } else {
8101                 $alt_url = href(-full=>1, action=>"summary");
8102         }
8103         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8104         if ($format eq 'rss') {
8105                 print <<XML;
8106 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8107 <channel>
8108 XML
8109                 print "<title>$title</title>\n" .
8110                       "<link>$alt_url</link>\n" .
8111                       "<description>$descr</description>\n" .
8112                       "<language>en</language>\n" .
8113                       # project owner is responsible for 'editorial' content
8114                       "<managingEditor>$owner</managingEditor>\n";
8115                 if (defined $logo || defined $favicon) {
8116                         # prefer the logo to the favicon, since RSS
8117                         # doesn't allow both
8118                         my $img = esc_url($logo || $favicon);
8119                         print "<image>\n" .
8120                               "<url>$img</url>\n" .
8121                               "<title>$title</title>\n" .
8122                               "<link>$alt_url</link>\n" .
8123                               "</image>\n";
8124                 }
8125                 if (%latest_date) {
8126                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8127                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8128                 }
8129                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8130         } elsif ($format eq 'atom') {
8131                 print <<XML;
8132 <feed xmlns="http://www.w3.org/2005/Atom">
8133 XML
8134                 print "<title>$title</title>\n" .
8135                       "<subtitle>$descr</subtitle>\n" .
8136                       '<link rel="alternate" type="text/html" href="' .
8137                       $alt_url . '" />' . "\n" .
8138                       '<link rel="self" type="' . $content_type . '" href="' .
8139                       $cgi->self_url() . '" />' . "\n" .
8140                       "<id>" . href(-full=>1) . "</id>\n" .
8141                       # use project owner for feed author
8142                       "<author><name>$owner</name></author>\n";
8143                 if (defined $favicon) {
8144                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8145                 }
8146                 if (defined $logo) {
8147                         # not twice as wide as tall: 72 x 27 pixels
8148                         print "<logo>" . esc_url($logo) . "</logo>\n";
8149                 }
8150                 if (! %latest_date) {
8151                         # dummy date to keep the feed valid until commits trickle in:
8152                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8153                 } else {
8154                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8155                 }
8156                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8157         }
8158
8159         # contents
8160         for (my $i = 0; $i <= $#commitlist; $i++) {
8161                 my %co = %{$commitlist[$i]};
8162                 my $commit = $co{'id'};
8163                 # we read 150, we always show 30 and the ones more recent than 48 hours
8164                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8165                         last;
8166                 }
8167                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8168
8169                 # get list of changed files
8170                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8171                         $co{'parent'} || "--root",
8172                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8173                         or next;
8174                 my @difftree = map { chomp; $_ } <$fd>;
8175                 close $fd
8176                         or next;
8177
8178                 # print element (entry, item)
8179                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8180                 if ($format eq 'rss') {
8181                         print "<item>\n" .
8182                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8183                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8184                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8185                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8186                               "<link>$co_url</link>\n" .
8187                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8188                               "<content:encoded>" .
8189                               "<![CDATA[\n";
8190                 } elsif ($format eq 'atom') {
8191                         print "<entry>\n" .
8192                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8193                               "<updated>$cd{'iso-8601'}</updated>\n" .
8194                               "<author>\n" .
8195                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8196                         if ($co{'author_email'}) {
8197                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8198                         }
8199                         print "</author>\n" .
8200                               # use committer for contributor
8201                               "<contributor>\n" .
8202                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8203                         if ($co{'committer_email'}) {
8204                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8205                         }
8206                         print "</contributor>\n" .
8207                               "<published>$cd{'iso-8601'}</published>\n" .
8208                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8209                               "<id>$co_url</id>\n" .
8210                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8211                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8212                 }
8213                 my $comment = $co{'comment'};
8214                 print "<pre>\n";
8215                 foreach my $line (@$comment) {
8216                         $line = esc_html($line);
8217                         print "$line\n";
8218                 }
8219                 print "</pre><ul>\n";
8220                 foreach my $difftree_line (@difftree) {
8221                         my %difftree = parse_difftree_raw_line($difftree_line);
8222                         next if !$difftree{'from_id'};
8223
8224                         my $file = $difftree{'file'} || $difftree{'to_file'};
8225
8226                         print "<li>" .
8227                               "[" .
8228                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8229                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8230                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8231                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8232                                       -title => "diff"}, 'D');
8233                         if ($have_blame) {
8234                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8235                                                              file_name=>$file, hash_base=>$commit),
8236                                               -title => "blame"}, 'B');
8237                         }
8238                         # if this is not a feed of a file history
8239                         if (!defined $file_name || $file_name ne $file) {
8240                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8241                                                              file_name=>$file, hash=>$commit),
8242                                               -title => "history"}, 'H');
8243                         }
8244                         $file = esc_path($file);
8245                         print "] ".
8246                               "$file</li>\n";
8247                 }
8248                 if ($format eq 'rss') {
8249                         print "</ul>]]>\n" .
8250                               "</content:encoded>\n" .
8251                               "</item>\n";
8252                 } elsif ($format eq 'atom') {
8253                         print "</ul>\n</div>\n" .
8254                               "</content>\n" .
8255                               "</entry>\n";
8256                 }
8257         }
8258
8259         # end of feed
8260         if ($format eq 'rss') {
8261                 print "</channel>\n</rss>\n";
8262         } elsif ($format eq 'atom') {
8263                 print "</feed>\n";
8264         }
8265 }
8266
8267 sub git_rss {
8268         git_feed('rss');
8269 }
8270
8271 sub git_atom {
8272         git_feed('atom');
8273 }
8274
8275 sub git_opml {
8276         my @list = git_get_projects_list($project_filter, $strict_export);
8277         if (!@list) {
8278                 die_error(404, "No projects found");
8279         }
8280
8281         print $cgi->header(
8282                 -type => 'text/xml',
8283                 -charset => 'utf-8',
8284                 -content_disposition => 'inline; filename="opml.xml"');
8285
8286         my $title = esc_html($site_name);
8287         my $filter = " within subdirectory ";
8288         if (defined $project_filter) {
8289                 $filter .= esc_html($project_filter);
8290         } else {
8291                 $filter = "";
8292         }
8293         print <<XML;
8294 <?xml version="1.0" encoding="utf-8"?>
8295 <opml version="1.0">
8296 <head>
8297   <title>$title OPML Export$filter</title>
8298 </head>
8299 <body>
8300 <outline text="git RSS feeds">
8301 XML
8302
8303         foreach my $pr (@list) {
8304                 my %proj = %$pr;
8305                 my $head = git_get_head_hash($proj{'path'});
8306                 if (!defined $head) {
8307                         next;
8308                 }
8309                 $git_dir = "$projectroot/$proj{'path'}";
8310                 my %co = parse_commit($head);
8311                 if (!%co) {
8312                         next;
8313                 }
8314
8315                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8316                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8317                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8318                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8319         }
8320         print <<XML;
8321 </outline>
8322 </body>
8323 </opml>
8324 XML
8325 }