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 # handle ACL in file access tests
  14 use filetest 'access';
  15 use CGI qw(:standard :escapeHTML -nosticky);
  16 use CGI::Util qw(unescape);
  17 use CGI::Carp qw(fatalsToBrowser set_message);
  18 use Encode;
  19 use Fcntl ':mode';
  20 use File::Find qw();
  21 use File::Basename qw(basename);
  22 use Time::HiRes qw(gettimeofday tv_interval);
  23 use Digest::MD5 qw(md5_hex);
  24
  25 binmode STDOUT, ':utf8';
  26
  27 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  28         eval 'sub CGI::multi_param { CGI::param(@_) }'
  29 }
  30
  31 our $t0 = [ gettimeofday() ];
  32 our $number_of_git_cmds = 0;
  33
  34 BEGIN {
  35         CGI->compile() if $ENV{'MOD_PERL'};
  36 }
  37
  38 our $version = "++GIT_VERSION++";
  39
  40 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  41 sub evaluate_uri {
  42         our $cgi;
  43
  44         our $my_url = $cgi->url();
  45         our $my_uri = $cgi->url(-absolute => 1);
  46
  47         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  48         # needed and used only for URLs with nonempty PATH_INFO
  49         our $base_url = $my_url;
  50
  51         # When the script is used as DirectoryIndex, the URL does not contain the name
  52         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  53         # have to do it ourselves. We make $path_info global because it's also used
  54         # later on.
  55         #
  56         # Another issue with the script being the DirectoryIndex is that the resulting
  57         # $my_url data is not the full script URL: this is good, because we want
  58         # generated links to keep implying the script name if it wasn't explicitly
  59         # indicated in the URL we're handling, but it means that $my_url cannot be used
  60         # as base URL.
  61         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  62         # to build the base URL ourselves:
  63         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  64         if ($path_info) {
  65                 # $path_info has already been URL-decoded by the web server, but
  66                 # $my_url and $my_uri have not. URL-decode them so we can properly
  67                 # strip $path_info.
  68                 $my_url = unescape($my_url);
  69                 $my_uri = unescape($my_uri);
  70                 if ($my_url =~ s,\Q$path_info\E$,, &&
  71                     $my_uri =~ s,\Q$path_info\E$,, &&
  72                     defined $ENV{'SCRIPT_NAME'}) {
  73                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  74                 }
  75         }
  76
  77         # target of the home link on top of all pages
  78         our $home_link = $my_uri || "/";
  79 }
  80
  81 # core git executable to use
  82 # this can just be "git" if your webserver has a sensible PATH
  83 our $GIT = "++GIT_BINDIR++/git";
  84
  85 # absolute fs-path which will be prepended to the project path
  86 #our $projectroot = "/pub/scm";
  87 our $projectroot = "++GITWEB_PROJECTROOT++";
  88
  89 # fs traversing limit for getting project list
  90 # the number is relative to the projectroot
  91 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  92
  93 # string of the home link on top of all pages
  94 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  95
  96 # extra breadcrumbs preceding the home link
  97 our @extra_breadcrumbs = ();
  98
  99 # name of your site or organization to appear in page titles
 100 # replace this with something more descriptive for clearer bookmarks
 101 our $site_name = "++GITWEB_SITENAME++"
 102                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
 103
 104 # html snippet to include in the <head> section of each page
 105 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
 106 # filename of html text to include at top of each page
 107 our $site_header = "++GITWEB_SITE_HEADER++";
 108 # html text to include at home page
 109 our $home_text = "++GITWEB_HOMETEXT++";
 110 # filename of html text to include at bottom of each page
 111 our $site_footer = "++GITWEB_SITE_FOOTER++";
 112
 113 # URI of stylesheets
 114 our @stylesheets = ("++GITWEB_CSS++");
 115 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 116 our $stylesheet = undef;
 117 # URI of GIT logo (72x27 size)
 118 our $logo = "++GITWEB_LOGO++";
 119 # URI of GIT favicon, assumed to be image/png type
 120 our $favicon = "++GITWEB_FAVICON++";
 121 # URI of gitweb.js (JavaScript code for gitweb)
 122 our $javascript = "++GITWEB_JS++";
 123
 124 # URI and label (title) of GIT logo link
 125 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 126 #our $logo_label = "git documentation";
 127 our $logo_url = "http://git-scm.com/";
 128 our $logo_label = "git homepage";
 129
 130 # source of projects list
 131 our $projects_list = "++GITWEB_LIST++";
 132
 133 # the width (in characters) of the projects list "Description" column
 134 our $projects_list_description_width = 25;
 135
 136 # group projects by category on the projects list
 137 # (enabled if this variable evaluates to true)
 138 our $projects_list_group_categories = 0;
 139
 140 # default category if none specified
 141 # (leave the empty string for no category)
 142 our $project_list_default_category = "";
 143
 144 # default order of projects list
 145 # valid values are none, project, descr, owner, and age
 146 our $default_projects_order = "project";
 147
 148 # show repository only if this file exists
 149 # (only effective if this variable evaluates to true)
 150 our $export_ok = "++GITWEB_EXPORT_OK++";
 151
 152 # don't generate age column on the projects list page
 153 our $omit_age_column = 0;
 154
 155 # don't generate information about owners of repositories
 156 our $omit_owner=0;
 157
 158 # show repository only if this subroutine returns true
 159 # when given the path to the project, for example:
 160 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 161 our $export_auth_hook = undef;
 162
 163 # only allow viewing of repositories also shown on the overview page
 164 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 165
 166 # list of git base URLs used for URL to where fetch project from,
 167 # i.e. full URL is "$git_base_url/$project"
 168 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 169
 170 # default blob_plain mimetype and default charset for text/plain blob
 171 our $default_blob_plain_mimetype = 'text/plain';
 172 our $default_text_plain_charset  = undef;
 173
 174 # file to use for guessing MIME types before trying /etc/mime.types
 175 # (relative to the current git repository)
 176 our $mimetypes_file = undef;
 177
 178 # assume this charset if line contains non-UTF-8 characters;
 179 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 180 # for which encoding all byte sequences are valid, for example
 181 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 182 # could be even 'utf-8' for the old behavior)
 183 our $fallback_encoding = 'latin1';
 184
 185 # rename detection options for git-diff and git-diff-tree
 186 # - default is '-M', with the cost proportional to
 187 #   (number of removed files) * (number of new files).
 188 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 189 #   (number of changed files + number of removed files) * (number of new files)
 190 # - even more costly is '-C', '--find-copies-harder' with cost
 191 #   (number of files in the original tree) * (number of new files)
 192 # - one might want to include '-B' option, e.g. '-B', '-M'
 193 our @diff_opts = ('-M'); # taken from git_commit
 194
 195 # Disables features that would allow repository owners to inject script into
 196 # the gitweb domain.
 197 our $prevent_xss = 0;
 198
 199 # Path to the highlight executable to use (must be the one from
 200 # http://www.andre-simon.de due to assumptions about parameters and output).
 201 # Useful if highlight is not installed on your webserver's PATH.
 202 # [Default: highlight]
 203 our $highlight_bin = "++HIGHLIGHT_BIN++";
 204
 205 # information about snapshot formats that gitweb is capable of serving
 206 our %known_snapshot_formats = (
 207         # name => {
 208         #       'display' => display name,
 209         #       'type' => mime type,
 210         #       'suffix' => filename suffix,
 211         #       'format' => --format for git-archive,
 212         #       'compressor' => [compressor command and arguments]
 213         #                       (array reference, optional)
 214         #       'disabled' => boolean (optional)}
 215         #
 216         'tgz' => {
 217                 'display' => 'tar.gz',
 218                 'type' => 'application/x-gzip',
 219                 'suffix' => '.tar.gz',
 220                 'format' => 'tar',
 221                 'compressor' => ['gzip', '-n']},
 222
 223         'tbz2' => {
 224                 'display' => 'tar.bz2',
 225                 'type' => 'application/x-bzip2',
 226                 'suffix' => '.tar.bz2',
 227                 'format' => 'tar',
 228                 'compressor' => ['bzip2']},
 229
 230         'txz' => {
 231                 'display' => 'tar.xz',
 232                 'type' => 'application/x-xz',
 233                 'suffix' => '.tar.xz',
 234                 'format' => 'tar',
 235                 'compressor' => ['xz'],
 236                 'disabled' => 1},
 237
 238         'zip' => {
 239                 'display' => 'zip',
 240                 'type' => 'application/x-zip',
 241                 'suffix' => '.zip',
 242                 'format' => 'zip'},
 243 );
 244
 245 # Aliases so we understand old gitweb.snapshot values in repository
 246 # configuration.
 247 our %known_snapshot_format_aliases = (
 248         'gzip'  => 'tgz',
 249         'bzip2' => 'tbz2',
 250         'xz'    => 'txz',
 251
 252         # backward compatibility: legacy gitweb config support
 253         'x-gzip' => undef, 'gz' => undef,
 254         'x-bzip2' => undef, 'bz2' => undef,
 255         'x-zip' => undef, '' => undef,
 256 );
 257
 258 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 259 # are changed, it may be appropriate to change these values too via
 260 # $GITWEB_CONFIG.
 261 our %avatar_size = (
 262         'default' => 16,
 263         'double'  => 32
 264 );
 265
 266 # Used to set the maximum load that we will still respond to gitweb queries.
 267 # If server load exceed this value then return "503 server busy" error.
 268 # If gitweb cannot determined server load, it is taken to be 0.
 269 # Leave it undefined (or set to 'undef') to turn off load checking.
 270 our $maxload = 300;
 271
 272 # configuration for 'highlight' (http://www.andre-simon.de/)
 273 # match by basename
 274 our %highlight_basename = (
 275         #'Program' => 'py',
 276         #'Library' => 'py',
 277         'SConstruct' => 'py', # SCons equivalent of Makefile
 278         'Makefile' => 'make',
 279 );
 280 # match by extension
 281 our %highlight_ext = (
 282         # main extensions, defining name of syntax;
 283         # see files in /usr/share/highlight/langDefs/ directory
 284         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 285         # alternate extensions, see /etc/highlight/filetypes.conf
 286         (map { $_ => 'c'   } qw(c h)),
 287         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 288         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 289         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 290         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 291         (map { $_ => 'make'} qw(make mak mk)),
 292         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 293 );
 294
 295 # You define site-wide feature defaults here; override them with
 296 # $GITWEB_CONFIG as necessary.
 297 our %feature = (
 298         # feature => {
 299         #       'sub' => feature-sub (subroutine),
 300         #       'override' => allow-override (boolean),
 301         #       'default' => [ default options...] (array reference)}
 302         #
 303         # if feature is overridable (it means that allow-override has true value),
 304         # then feature-sub will be called with default options as parameters;
 305         # return value of feature-sub indicates if to enable specified feature
 306         #
 307         # if there is no 'sub' key (no feature-sub), then feature cannot be
 308         # overridden
 309         #
 310         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 311         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 312         # is enabled
 313
 314         # Enable the 'blame' blob view, showing the last commit that modified
 315         # each line in the file. This can be very CPU-intensive.
 316
 317         # To enable system wide have in $GITWEB_CONFIG
 318         # $feature{'blame'}{'default'} = [1];
 319         # To have project specific config enable override in $GITWEB_CONFIG
 320         # $feature{'blame'}{'override'} = 1;
 321         # and in project config gitweb.blame = 0|1;
 322         'blame' => {
 323                 'sub' => sub { feature_bool('blame', @_) },
 324                 'override' => 0,
 325                 'default' => [0]},
 326
 327         # Enable the 'snapshot' link, providing a compressed archive of any
 328         # tree. This can potentially generate high traffic if you have large
 329         # project.
 330
 331         # Value is a list of formats defined in %known_snapshot_formats that
 332         # you wish to offer.
 333         # To disable system wide have in $GITWEB_CONFIG
 334         # $feature{'snapshot'}{'default'} = [];
 335         # To have project specific config enable override in $GITWEB_CONFIG
 336         # $feature{'snapshot'}{'override'} = 1;
 337         # and in project config, a comma-separated list of formats or "none"
 338         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 339         'snapshot' => {
 340                 'sub' => \&feature_snapshot,
 341                 'override' => 0,
 342                 'default' => ['tgz']},
 343
 344         # Enable text search, which will list the commits which match author,
 345         # committer or commit text to a given string.  Enabled by default.
 346         # Project specific override is not supported.
 347         #
 348         # Note that this controls all search features, which means that if
 349         # it is disabled, then 'grep' and 'pickaxe' search would also be
 350         # disabled.
 351         'search' => {
 352                 'override' => 0,
 353                 'default' => [1]},
 354
 355         # Enable grep search, which will list the files in currently selected
 356         # tree containing the given string. Enabled by default. This can be
 357         # potentially CPU-intensive, of course.
 358         # Note that you need to have 'search' feature enabled too.
 359
 360         # To enable system wide have in $GITWEB_CONFIG
 361         # $feature{'grep'}{'default'} = [1];
 362         # To have project specific config enable override in $GITWEB_CONFIG
 363         # $feature{'grep'}{'override'} = 1;
 364         # and in project config gitweb.grep = 0|1;
 365         'grep' => {
 366                 'sub' => sub { feature_bool('grep', @_) },
 367                 'override' => 0,
 368                 'default' => [1]},
 369
 370         # Enable the pickaxe search, which will list the commits that modified
 371         # a given string in a file. This can be practical and quite faster
 372         # alternative to 'blame', but still potentially CPU-intensive.
 373         # Note that you need to have 'search' feature enabled too.
 374
 375         # To enable system wide have in $GITWEB_CONFIG
 376         # $feature{'pickaxe'}{'default'} = [1];
 377         # To have project specific config enable override in $GITWEB_CONFIG
 378         # $feature{'pickaxe'}{'override'} = 1;
 379         # and in project config gitweb.pickaxe = 0|1;
 380         'pickaxe' => {
 381                 'sub' => sub { feature_bool('pickaxe', @_) },
 382                 'override' => 0,
 383                 'default' => [1]},
 384
 385         # Enable showing size of blobs in a 'tree' view, in a separate
 386         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 387
 388         # To disable system wide have in $GITWEB_CONFIG
 389         # $feature{'show-sizes'}{'default'} = [0];
 390         # To have project specific config enable override in $GITWEB_CONFIG
 391         # $feature{'show-sizes'}{'override'} = 1;
 392         # and in project config gitweb.showsizes = 0|1;
 393         'show-sizes' => {
 394                 'sub' => sub { feature_bool('showsizes', @_) },
 395                 'override' => 0,
 396                 'default' => [1]},
 397
 398         # Make gitweb use an alternative format of the URLs which can be
 399         # more readable and natural-looking: project name is embedded
 400         # directly in the path and the query string contains other
 401         # auxiliary information. All gitweb installations recognize
 402         # URL in either format; this configures in which formats gitweb
 403         # generates links.
 404
 405         # To enable system wide have in $GITWEB_CONFIG
 406         # $feature{'pathinfo'}{'default'} = [1];
 407         # Project specific override is not supported.
 408
 409         # Note that you will need to change the default location of CSS,
 410         # favicon, logo and possibly other files to an absolute URL. Also,
 411         # if gitweb.cgi serves as your indexfile, you will need to force
 412         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 413         'pathinfo' => {
 414                 'override' => 0,
 415                 'default' => [0]},
 416
 417         # Make gitweb consider projects in project root subdirectories
 418         # to be forks of existing projects. Given project $projname.git,
 419         # projects matching $projname/*.git will not be shown in the main
 420         # projects list, instead a '+' mark will be added to $projname
 421         # there and a 'forks' view will be enabled for the project, listing
 422         # all the forks. If project list is taken from a file, forks have
 423         # to be listed after the main project.
 424
 425         # To enable system wide have in $GITWEB_CONFIG
 426         # $feature{'forks'}{'default'} = [1];
 427         # Project specific override is not supported.
 428         'forks' => {
 429                 'override' => 0,
 430                 'default' => [0]},
 431
 432         # Insert custom links to the action bar of all project pages.
 433         # This enables you mainly to link to third-party scripts integrating
 434         # into gitweb; e.g. git-browser for graphical history representation
 435         # or custom web-based repository administration interface.
 436
 437         # The 'default' value consists of a list of triplets in the form
 438         # (label, link, position) where position is the label after which
 439         # to insert the link and link is a format string where %n expands
 440         # to the project name, %f to the project path within the filesystem,
 441         # %h to the current hash (h gitweb parameter) and %b to the current
 442         # hash base (hb gitweb parameter); %% expands to %.
 443
 444         # To enable system wide have in $GITWEB_CONFIG e.g.
 445         # $feature{'actions'}{'default'} = [('graphiclog',
 446         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 447         # Project specific override is not supported.
 448         'actions' => {
 449                 'override' => 0,
 450                 'default' => []},
 451
 452         # Allow gitweb scan project content tags of project repository,
 453         # and display the popular Web 2.0-ish "tag cloud" near the projects
 454         # list.  Note that this is something COMPLETELY different from the
 455         # normal Git tags.
 456
 457         # gitweb by itself can show existing tags, but it does not handle
 458         # tagging itself; you need to do it externally, outside gitweb.
 459         # The format is described in git_get_project_ctags() subroutine.
 460         # You may want to install the HTML::TagCloud Perl module to get
 461         # a pretty tag cloud instead of just a list of tags.
 462
 463         # To enable system wide have in $GITWEB_CONFIG
 464         # $feature{'ctags'}{'default'} = [1];
 465         # Project specific override is not supported.
 466
 467         # In the future whether ctags editing is enabled might depend
 468         # on the value, but using 1 should always mean no editing of ctags.
 469         'ctags' => {
 470                 'override' => 0,
 471                 'default' => [0]},
 472
 473         # The maximum number of patches in a patchset generated in patch
 474         # view. Set this to 0 or undef to disable patch view, or to a
 475         # negative number to remove any limit.
 476
 477         # To disable system wide have in $GITWEB_CONFIG
 478         # $feature{'patches'}{'default'} = [0];
 479         # To have project specific config enable override in $GITWEB_CONFIG
 480         # $feature{'patches'}{'override'} = 1;
 481         # and in project config gitweb.patches = 0|n;
 482         # where n is the maximum number of patches allowed in a patchset.
 483         'patches' => {
 484                 'sub' => \&feature_patches,
 485                 'override' => 0,
 486                 'default' => [16]},
 487
 488         # Avatar support. When this feature is enabled, views such as
 489         # shortlog or commit will display an avatar associated with
 490         # the email of the committer(s) and/or author(s).
 491
 492         # Currently available providers are gravatar and picon.
 493         # If an unknown provider is specified, the feature is disabled.
 494
 495         # Picon currently relies on the indiana.edu database.
 496
 497         # To enable system wide have in $GITWEB_CONFIG
 498         # $feature{'avatar'}{'default'} = ['<provider>'];
 499         # where <provider> is either gravatar or picon.
 500         # To have project specific config enable override in $GITWEB_CONFIG
 501         # $feature{'avatar'}{'override'} = 1;
 502         # and in project config gitweb.avatar = <provider>;
 503         'avatar' => {
 504                 'sub' => \&feature_avatar,
 505                 'override' => 0,
 506                 'default' => ['']},
 507
 508         # Enable displaying how much time and how many git commands
 509         # it took to generate and display page.  Disabled by default.
 510         # Project specific override is not supported.
 511         'timed' => {
 512                 'override' => 0,
 513                 'default' => [0]},
 514
 515         # Enable turning some links into links to actions which require
 516         # JavaScript to run (like 'blame_incremental').  Not enabled by
 517         # default.  Project specific override is currently not supported.
 518         'javascript-actions' => {
 519                 'override' => 0,
 520                 'default' => [0]},
 521
 522         # Enable and configure ability to change common timezone for dates
 523         # in gitweb output via JavaScript.  Enabled by default.
 524         # Project specific override is not supported.
 525         'javascript-timezone' => {
 526                 'override' => 0,
 527                 'default' => [
 528                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 529                                      # or undef to turn off this feature
 530                         'gitweb_tz', # name of cookie where to store selected timezone
 531                         'datetime',  # CSS class used to mark up dates for manipulation
 532                 ]},
 533
 534         # Syntax highlighting support. This is based on Daniel Svensson's
 535         # and Sham Chukoury's work in gitweb-xmms2.git.
 536         # It requires the 'highlight' program present in $PATH,
 537         # and therefore is disabled by default.
 538
 539         # To enable system wide have in $GITWEB_CONFIG
 540         # $feature{'highlight'}{'default'} = [1];
 541
 542         'highlight' => {
 543                 'sub' => sub { feature_bool('highlight', @_) },
 544                 'override' => 0,
 545                 'default' => [0]},
 546
 547         # Enable displaying of remote heads in the heads list
 548
 549         # To enable system wide have in $GITWEB_CONFIG
 550         # $feature{'remote_heads'}{'default'} = [1];
 551         # To have project specific config enable override in $GITWEB_CONFIG
 552         # $feature{'remote_heads'}{'override'} = 1;
 553         # and in project config gitweb.remoteheads = 0|1;
 554         'remote_heads' => {
 555                 'sub' => sub { feature_bool('remote_heads', @_) },
 556                 'override' => 0,
 557                 'default' => [0]},
 558
 559         # Enable showing branches under other refs in addition to heads
 560
 561         # To set system wide extra branch refs have in $GITWEB_CONFIG
 562         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 563         # To have project specific config enable override in $GITWEB_CONFIG
 564         # $feature{'extra-branch-refs'}{'override'} = 1;
 565         # and in project config gitweb.extrabranchrefs = dirs of choice
 566         # Every directory is separated with whitespace.
 567
 568         'extra-branch-refs' => {
 569                 'sub' => \&feature_extra_branch_refs,
 570                 'override' => 0,
 571                 'default' => []},
 572
 573         # Redact e-mail addresses.
 574
 575         # To enable system wide have in $GITWEB_CONFIG
 576         # $feature{'email-privacy'}{'default'} = [1];
 577         'email-privacy' => {
 578                 'sub' => sub { feature_bool('email-privacy', @_) },
 579                 'override' => 1,
 580                 'default' => [0]},
 581 );
 582
 583 sub gitweb_get_feature {
 584         my ($name) = @_;
 585         return unless exists $feature{$name};
 586         my ($sub, $override, @defaults) = (
 587                 $feature{$name}{'sub'},
 588                 $feature{$name}{'override'},
 589                 @{$feature{$name}{'default'}});
 590         # project specific override is possible only if we have project
 591         our $git_dir; # global variable, declared later
 592         if (!$override || !defined $git_dir) {
 593                 return @defaults;
 594         }
 595         if (!defined $sub) {
 596                 warn "feature $name is not overridable";
 597                 return @defaults;
 598         }
 599         return $sub->(@defaults);
 600 }
 601
 602 # A wrapper to check if a given feature is enabled.
 603 # With this, you can say
 604 #
 605 #   my $bool_feat = gitweb_check_feature('bool_feat');
 606 #   gitweb_check_feature('bool_feat') or somecode;
 607 #
 608 # instead of
 609 #
 610 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 611 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 612 #
 613 sub gitweb_check_feature {
 614         return (gitweb_get_feature(@_))[0];
 615 }
 616
 617
 618 sub feature_bool {
 619         my $key = shift;
 620         my ($val) = git_get_project_config($key, '--bool');
 621
 622         if (!defined $val) {
 623                 return ($_[0]);
 624         } elsif ($val eq 'true') {
 625                 return (1);
 626         } elsif ($val eq 'false') {
 627                 return (0);
 628         }
 629 }
 630
 631 sub feature_snapshot {
 632         my (@fmts) = @_;
 633
 634         my ($val) = git_get_project_config('snapshot');
 635
 636         if ($val) {
 637                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 638         }
 639
 640         return @fmts;
 641 }
 642
 643 sub feature_patches {
 644         my @val = (git_get_project_config('patches', '--int'));
 645
 646         if (@val) {
 647                 return @val;
 648         }
 649
 650         return ($_[0]);
 651 }
 652
 653 sub feature_avatar {
 654         my @val = (git_get_project_config('avatar'));
 655
 656         return @val ? @val : @_;
 657 }
 658
 659 sub feature_extra_branch_refs {
 660         my (@branch_refs) = @_;
 661         my $values = git_get_project_config('extrabranchrefs');
 662
 663         if ($values) {
 664                 $values = config_to_multi ($values);
 665                 @branch_refs = ();
 666                 foreach my $value (@{$values}) {
 667                         push @branch_refs, split /\s+/, $value;
 668                 }
 669         }
 670
 671         return @branch_refs;
 672 }
 673
 674 # checking HEAD file with -e is fragile if the repository was
 675 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 676 # and then pruned.
 677 sub check_head_link {
 678         my ($dir) = @_;
 679         my $headfile = "$dir/HEAD";
 680         return ((-e $headfile) ||
 681                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 682 }
 683
 684 sub check_export_ok {
 685         my ($dir) = @_;
 686         return (check_head_link($dir) &&
 687                 (!$export_ok || -e "$dir/$export_ok") &&
 688                 (!$export_auth_hook || $export_auth_hook->($dir)));
 689 }
 690
 691 # process alternate names for backward compatibility
 692 # filter out unsupported (unknown) snapshot formats
 693 sub filter_snapshot_fmts {
 694         my @fmts = @_;
 695
 696         @fmts = map {
 697                 exists $known_snapshot_format_aliases{$_} ?
 698                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 699         @fmts = grep {
 700                 exists $known_snapshot_formats{$_} &&
 701                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 702 }
 703
 704 sub filter_and_validate_refs {
 705         my @refs = @_;
 706         my %unique_refs = ();
 707
 708         foreach my $ref (@refs) {
 709                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 710                 # 'heads' are added implicitly in get_branch_refs().
 711                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 712         }
 713         return sort keys %unique_refs;
 714 }
 715
 716 # If it is set to code reference, it is code that it is to be run once per
 717 # request, allowing updating configurations that change with each request,
 718 # while running other code in config file only once.
 719 #
 720 # Otherwise, if it is false then gitweb would process config file only once;
 721 # if it is true then gitweb config would be run for each request.
 722 our $per_request_config = 1;
 723
 724 # read and parse gitweb config file given by its parameter.
 725 # returns true on success, false on recoverable error, allowing
 726 # to chain this subroutine, using first file that exists.
 727 # dies on errors during parsing config file, as it is unrecoverable.
 728 sub read_config_file {
 729         my $filename = shift;
 730         return unless defined $filename;
 731         # die if there are errors parsing config file
 732         if (-e $filename) {
 733                 do $filename;
 734                 die $@ if $@;
 735                 return 1;
 736         }
 737         return;
 738 }
 739
 740 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 741 sub evaluate_gitweb_config {
 742         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 743         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 744         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 745
 746         # Protect against duplications of file names, to not read config twice.
 747         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 748         # there possibility of duplication of filename there doesn't matter.
 749         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 750         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 751
 752         # Common system-wide settings for convenience.
 753         # Those settings can be overridden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 754         read_config_file($GITWEB_CONFIG_COMMON);
 755
 756         # Use first config file that exists.  This means use the per-instance
 757         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 758         read_config_file($GITWEB_CONFIG) and return;
 759         read_config_file($GITWEB_CONFIG_SYSTEM);
 760 }
 761
 762 # Get loadavg of system, to compare against $maxload.
 763 # Currently it requires '/proc/loadavg' present to get loadavg;
 764 # if it is not present it returns 0, which means no load checking.
 765 sub get_loadavg {
 766         if( -e '/proc/loadavg' ){
 767                 open my $fd, '<', '/proc/loadavg'
 768                         or return 0;
 769                 my @load = split(/\s+/, scalar <$fd>);
 770                 close $fd;
 771
 772                 # The first three columns measure CPU and IO utilization of the last one,
 773                 # five, and 10 minute periods.  The fourth column shows the number of
 774                 # currently running processes and the total number of processes in the m/n
 775                 # format.  The last column displays the last process ID used.
 776                 return $load[0] || 0;
 777         }
 778         # additional checks for load average should go here for things that don't export
 779         # /proc/loadavg
 780
 781         return 0;
 782 }
 783
 784 # version of the core git binary
 785 our $git_version;
 786 sub evaluate_git_version {
 787         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 788         $number_of_git_cmds++;
 789 }
 790
 791 sub check_loadavg {
 792         if (defined $maxload && get_loadavg() > $maxload) {
 793                 die_error(503, "The load average on the server is too high");
 794         }
 795 }
 796
 797 # ======================================================================
 798 # input validation and dispatch
 799
 800 # Various hash size-related values.
 801 my $sha1_len = 40;
 802 my $sha256_extra_len = 24;
 803 my $sha256_len = $sha1_len + $sha256_extra_len;
 804
 805 # A regex matching $len hex characters. $len may be a range (e.g. 7,64).
 806 sub oid_nlen_regex {
 807         my $len = shift;
 808         my $hchr = qr/[0-9a-fA-F]/;
 809         return qr/(?:(?:$hchr){$len})/;
 810 }
 811
 812 # A regex matching two sets of $nlen hex characters, prefixed by the literal
 813 # string $prefix and with the literal string $infix between them.
 814 sub oid_nlen_prefix_infix_regex {
 815         my $nlen = shift;
 816         my $prefix = shift;
 817         my $infix = shift;
 818
 819         my $rx = oid_nlen_regex($nlen);
 820
 821         return qr/^\Q$prefix\E$rx\Q$infix\E$rx$/;
 822 }
 823
 824 # A regex matching a valid object ID.
 825 our $oid_regex;
 826 {
 827         my $x = oid_nlen_regex($sha1_len);
 828         my $y = oid_nlen_regex($sha256_extra_len);
 829         $oid_regex = qr/(?:$x(?:$y)?)/;
 830 }
 831
 832 # input parameters can be collected from a variety of sources (presently, CGI
 833 # and PATH_INFO), so we define an %input_params hash that collects them all
 834 # together during validation: this allows subsequent uses (e.g. href()) to be
 835 # agnostic of the parameter origin
 836
 837 our %input_params = ();
 838
 839 # input parameters are stored with the long parameter name as key. This will
 840 # also be used in the href subroutine to convert parameters to their CGI
 841 # equivalent, and since the href() usage is the most frequent one, we store
 842 # the name -> CGI key mapping here, instead of the reverse.
 843 #
 844 # XXX: Warning: If you touch this, check the search form for updating,
 845 # too.
 846
 847 our @cgi_param_mapping = (
 848         project => "p",
 849         action => "a",
 850         file_name => "f",
 851         file_parent => "fp",
 852         hash => "h",
 853         hash_parent => "hp",
 854         hash_base => "hb",
 855         hash_parent_base => "hpb",
 856         page => "pg",
 857         order => "o",
 858         searchtext => "s",
 859         searchtype => "st",
 860         snapshot_format => "sf",
 861         extra_options => "opt",
 862         search_use_regexp => "sr",
 863         ctag => "by_tag",
 864         diff_style => "ds",
 865         project_filter => "pf",
 866         # this must be last entry (for manipulation from JavaScript)
 867         javascript => "js"
 868 );
 869 our %cgi_param_mapping = @cgi_param_mapping;
 870
 871 # we will also need to know the possible actions, for validation
 872 our %actions = (
 873         "blame" => \&git_blame,
 874         "blame_incremental" => \&git_blame_incremental,
 875         "blame_data" => \&git_blame_data,
 876         "blobdiff" => \&git_blobdiff,
 877         "blobdiff_plain" => \&git_blobdiff_plain,
 878         "blob" => \&git_blob,
 879         "blob_plain" => \&git_blob_plain,
 880         "commitdiff" => \&git_commitdiff,
 881         "commitdiff_plain" => \&git_commitdiff_plain,
 882         "commit" => \&git_commit,
 883         "forks" => \&git_forks,
 884         "heads" => \&git_heads,
 885         "history" => \&git_history,
 886         "log" => \&git_log,
 887         "patch" => \&git_patch,
 888         "patches" => \&git_patches,
 889         "remotes" => \&git_remotes,
 890         "rss" => \&git_rss,
 891         "atom" => \&git_atom,
 892         "search" => \&git_search,
 893         "search_help" => \&git_search_help,
 894         "shortlog" => \&git_shortlog,
 895         "summary" => \&git_summary,
 896         "tag" => \&git_tag,
 897         "tags" => \&git_tags,
 898         "tree" => \&git_tree,
 899         "snapshot" => \&git_snapshot,
 900         "object" => \&git_object,
 901         # those below don't need $project
 902         "opml" => \&git_opml,
 903         "project_list" => \&git_project_list,
 904         "project_index" => \&git_project_index,
 905 );
 906
 907 # finally, we have the hash of allowed extra_options for the commands that
 908 # allow them
 909 our %allowed_options = (
 910         "--no-merges" => [ qw(rss atom log shortlog history) ],
 911 );
 912
 913 # fill %input_params with the CGI parameters. All values except for 'opt'
 914 # should be single values, but opt can be an array. We should probably
 915 # build an array of parameters that can be multi-valued, but since for the time
 916 # being it's only this one, we just single it out
 917 sub evaluate_query_params {
 918         our $cgi;
 919
 920         while (my ($name, $symbol) = each %cgi_param_mapping) {
 921                 if ($symbol eq 'opt') {
 922                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 923                 } else {
 924                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 925                 }
 926         }
 927 }
 928
 929 # now read PATH_INFO and update the parameter list for missing parameters
 930 sub evaluate_path_info {
 931         return if defined $input_params{'project'};
 932         return if !$path_info;
 933         $path_info =~ s,^/+,,;
 934         return if !$path_info;
 935
 936         # find which part of PATH_INFO is project
 937         my $project = $path_info;
 938         $project =~ s,/+$,,;
 939         while ($project && !check_head_link("$projectroot/$project")) {
 940                 $project =~ s,/*[^/]*$,,;
 941         }
 942         return unless $project;
 943         $input_params{'project'} = $project;
 944
 945         # do not change any parameters if an action is given using the query string
 946         return if $input_params{'action'};
 947         $path_info =~ s,^\Q$project\E/*,,;
 948
 949         # next, check if we have an action
 950         my $action = $path_info;
 951         $action =~ s,/.*$,,;
 952         if (exists $actions{$action}) {
 953                 $path_info =~ s,^$action/*,,;
 954                 $input_params{'action'} = $action;
 955         }
 956
 957         # list of actions that want hash_base instead of hash, but can have no
 958         # pathname (f) parameter
 959         my @wants_base = (
 960                 'tree',
 961                 'history',
 962         );
 963
 964         # we want to catch, among others
 965         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 966         my ($parentrefname, $parentpathname, $refname, $pathname) =
 967                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 968
 969         # first, analyze the 'current' part
 970         if (defined $pathname) {
 971                 # we got "branch:filename" or "branch:dir/"
 972                 # we could use git_get_type(branch:pathname), but:
 973                 # - it needs $git_dir
 974                 # - it does a git() call
 975                 # - the convention of terminating directories with a slash
 976                 #   makes it superfluous
 977                 # - embedding the action in the PATH_INFO would make it even
 978                 #   more superfluous
 979                 $pathname =~ s,^/+,,;
 980                 if (!$pathname || substr($pathname, -1) eq "/") {
 981                         $input_params{'action'} ||= "tree";
 982                         $pathname =~ s,/$,,;
 983                 } else {
 984                         # the default action depends on whether we had parent info
 985                         # or not
 986                         if ($parentrefname) {
 987                                 $input_params{'action'} ||= "blobdiff_plain";
 988                         } else {
 989                                 $input_params{'action'} ||= "blob_plain";
 990                         }
 991                 }
 992                 $input_params{'hash_base'} ||= $refname;
 993                 $input_params{'file_name'} ||= $pathname;
 994         } elsif (defined $refname) {
 995                 # we got "branch". In this case we have to choose if we have to
 996                 # set hash or hash_base.
 997                 #
 998                 # Most of the actions without a pathname only want hash to be
 999                 # set, except for the ones specified in @wants_base that want
1000                 # hash_base instead. It should also be noted that hand-crafted
1001                 # links having 'history' as an action and no pathname or hash
1002                 # set will fail, but that happens regardless of PATH_INFO.
1003                 if (defined $parentrefname) {
1004                         # if there is parent let the default be 'shortlog' action
1005                         # (for http://git.example.com/repo.git/A..B links); if there
1006                         # is no parent, dispatch will detect type of object and set
1007                         # action appropriately if required (if action is not set)
1008                         $input_params{'action'} ||= "shortlog";
1009                 }
1010                 if ($input_params{'action'} &&
1011                     grep { $_ eq $input_params{'action'} } @wants_base) {
1012                         $input_params{'hash_base'} ||= $refname;
1013                 } else {
1014                         $input_params{'hash'} ||= $refname;
1015                 }
1016         }
1017
1018         # next, handle the 'parent' part, if present
1019         if (defined $parentrefname) {
1020                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
1021                 # someproject/blobdiff/oldrev..newrev:/filename
1022                 if ($parentpathname) {
1023                         $parentpathname =~ s,^/+,,;
1024                         $parentpathname =~ s,/$,,;
1025                         $input_params{'file_parent'} ||= $parentpathname;
1026                 } else {
1027                         $input_params{'file_parent'} ||= $input_params{'file_name'};
1028                 }
1029                 # we assume that hash_parent_base is wanted if a path was specified,
1030                 # or if the action wants hash_base instead of hash
1031                 if (defined $input_params{'file_parent'} ||
1032                         grep { $_ eq $input_params{'action'} } @wants_base) {
1033                         $input_params{'hash_parent_base'} ||= $parentrefname;
1034                 } else {
1035                         $input_params{'hash_parent'} ||= $parentrefname;
1036                 }
1037         }
1038
1039         # for the snapshot action, we allow URLs in the form
1040         # $project/snapshot/$hash.ext
1041         # where .ext determines the snapshot and gets removed from the
1042         # passed $refname to provide the $hash.
1043         #
1044         # To be able to tell that $refname includes the format extension, we
1045         # require the following two conditions to be satisfied:
1046         # - the hash input parameter MUST have been set from the $refname part
1047         #   of the URL (i.e. they must be equal)
1048         # - the snapshot format MUST NOT have been defined already (e.g. from
1049         #   CGI parameter sf)
1050         # It's also useless to try any matching unless $refname has a dot,
1051         # so we check for that too
1052         if (defined $input_params{'action'} &&
1053                 $input_params{'action'} eq 'snapshot' &&
1054                 defined $refname && index($refname, '.') != -1 &&
1055                 $refname eq $input_params{'hash'} &&
1056                 !defined $input_params{'snapshot_format'}) {
1057                 # We loop over the known snapshot formats, checking for
1058                 # extensions. Allowed extensions are both the defined suffix
1059                 # (which includes the initial dot already) and the snapshot
1060                 # format key itself, with a prepended dot
1061                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1062                         my $hash = $refname;
1063                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1064                                 next;
1065                         }
1066                         my $sfx = $1;
1067                         # a valid suffix was found, so set the snapshot format
1068                         # and reset the hash parameter
1069                         $input_params{'snapshot_format'} = $fmt;
1070                         $input_params{'hash'} = $hash;
1071                         # we also set the format suffix to the one requested
1072                         # in the URL: this way a request for e.g. .tgz returns
1073                         # a .tgz instead of a .tar.gz
1074                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1075                         last;
1076                 }
1077         }
1078 }
1079
1080 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1081      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1082      $searchtext, $search_regexp, $project_filter);
1083 sub evaluate_and_validate_params {
1084         our $action = $input_params{'action'};
1085         if (defined $action) {
1086                 if (!is_valid_action($action)) {
1087                         die_error(400, "Invalid action parameter");
1088                 }
1089         }
1090
1091         # parameters which are pathnames
1092         our $project = $input_params{'project'};
1093         if (defined $project) {
1094                 if (!is_valid_project($project)) {
1095                         undef $project;
1096                         die_error(404, "No such project");
1097                 }
1098         }
1099
1100         our $project_filter = $input_params{'project_filter'};
1101         if (defined $project_filter) {
1102                 if (!is_valid_pathname($project_filter)) {
1103                         die_error(404, "Invalid project_filter parameter");
1104                 }
1105         }
1106
1107         our $file_name = $input_params{'file_name'};
1108         if (defined $file_name) {
1109                 if (!is_valid_pathname($file_name)) {
1110                         die_error(400, "Invalid file parameter");
1111                 }
1112         }
1113
1114         our $file_parent = $input_params{'file_parent'};
1115         if (defined $file_parent) {
1116                 if (!is_valid_pathname($file_parent)) {
1117                         die_error(400, "Invalid file parent parameter");
1118                 }
1119         }
1120
1121         # parameters which are refnames
1122         our $hash = $input_params{'hash'};
1123         if (defined $hash) {
1124                 if (!is_valid_refname($hash)) {
1125                         die_error(400, "Invalid hash parameter");
1126                 }
1127         }
1128
1129         our $hash_parent = $input_params{'hash_parent'};
1130         if (defined $hash_parent) {
1131                 if (!is_valid_refname($hash_parent)) {
1132                         die_error(400, "Invalid hash parent parameter");
1133                 }
1134         }
1135
1136         our $hash_base = $input_params{'hash_base'};
1137         if (defined $hash_base) {
1138                 if (!is_valid_refname($hash_base)) {
1139                         die_error(400, "Invalid hash base parameter");
1140                 }
1141         }
1142
1143         our @extra_options = @{$input_params{'extra_options'}};
1144         # @extra_options is always defined, since it can only be (currently) set from
1145         # CGI, and $cgi->param() returns the empty array in array context if the param
1146         # is not set
1147         foreach my $opt (@extra_options) {
1148                 if (not exists $allowed_options{$opt}) {
1149                         die_error(400, "Invalid option parameter");
1150                 }
1151                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1152                         die_error(400, "Invalid option parameter for this action");
1153                 }
1154         }
1155
1156         our $hash_parent_base = $input_params{'hash_parent_base'};
1157         if (defined $hash_parent_base) {
1158                 if (!is_valid_refname($hash_parent_base)) {
1159                         die_error(400, "Invalid hash parent base parameter");
1160                 }
1161         }
1162
1163         # other parameters
1164         our $page = $input_params{'page'};
1165         if (defined $page) {
1166                 if ($page =~ m/[^0-9]/) {
1167                         die_error(400, "Invalid page parameter");
1168                 }
1169         }
1170
1171         our $searchtype = $input_params{'searchtype'};
1172         if (defined $searchtype) {
1173                 if ($searchtype =~ m/[^a-z]/) {
1174                         die_error(400, "Invalid searchtype parameter");
1175                 }
1176         }
1177
1178         our $search_use_regexp = $input_params{'search_use_regexp'};
1179
1180         our $searchtext = $input_params{'searchtext'};
1181         our $search_regexp = undef;
1182         if (defined $searchtext) {
1183                 if (length($searchtext) < 2) {
1184                         die_error(403, "At least two characters are required for search parameter");
1185                 }
1186                 if ($search_use_regexp) {
1187                         $search_regexp = $searchtext;
1188                         if (!eval { qr/$search_regexp/; 1; }) {
1189                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1190                                 die_error(400, "Invalid search regexp '$search_regexp'",
1191                                           esc_html($error));
1192                         }
1193                 } else {
1194                         $search_regexp = quotemeta $searchtext;
1195                 }
1196         }
1197 }
1198
1199 # path to the current git repository
1200 our $git_dir;
1201 sub evaluate_git_dir {
1202         our $git_dir = "$projectroot/$project" if $project;
1203 }
1204
1205 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1206 sub configure_gitweb_features {
1207         # list of supported snapshot formats
1208         our @snapshot_fmts = gitweb_get_feature('snapshot');
1209         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1210
1211         our ($git_avatar) = gitweb_get_feature('avatar');
1212         $git_avatar = '' unless $git_avatar =~ /^(?:gravatar|picon)$/s;
1213
1214         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1215         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1216 }
1217
1218 sub get_branch_refs {
1219         return ('heads', @extra_branch_refs);
1220 }
1221
1222 # custom error handler: 'die <message>' is Internal Server Error
1223 sub handle_errors_html {
1224         my $msg = shift; # it is already HTML escaped
1225
1226         # to avoid infinite loop where error occurs in die_error,
1227         # change handler to default handler, disabling handle_errors_html
1228         set_message("Error occurred when inside die_error:\n$msg");
1229
1230         # you cannot jump out of die_error when called as error handler;
1231         # the subroutine set via CGI::Carp::set_message is called _after_
1232         # HTTP headers are already written, so it cannot write them itself
1233         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1234 }
1235 set_message(\&handle_errors_html);
1236
1237 # dispatch
1238 sub dispatch {
1239         if (!defined $action) {
1240                 if (defined $hash) {
1241                         $action = git_get_type($hash);
1242                         $action or die_error(404, "Object does not exist");
1243                 } elsif (defined $hash_base && defined $file_name) {
1244                         $action = git_get_type("$hash_base:$file_name");
1245                         $action or die_error(404, "File or directory does not exist");
1246                 } elsif (defined $project) {
1247                         $action = 'summary';
1248                 } else {
1249                         $action = 'project_list';
1250                 }
1251         }
1252         if (!defined($actions{$action})) {
1253                 die_error(400, "Unknown action");
1254         }
1255         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1256             !$project) {
1257                 die_error(400, "Project needed");
1258         }
1259         $actions{$action}->();
1260 }
1261
1262 sub reset_timer {
1263         our $t0 = [ gettimeofday() ]
1264                 if defined $t0;
1265         our $number_of_git_cmds = 0;
1266 }
1267
1268 our $first_request = 1;
1269 sub run_request {
1270         reset_timer();
1271
1272         evaluate_uri();
1273         if ($first_request) {
1274                 evaluate_gitweb_config();
1275                 evaluate_git_version();
1276         }
1277         if ($per_request_config) {
1278                 if (ref($per_request_config) eq 'CODE') {
1279                         $per_request_config->();
1280                 } elsif (!$first_request) {
1281                         evaluate_gitweb_config();
1282                 }
1283         }
1284         check_loadavg();
1285
1286         # $projectroot and $projects_list might be set in gitweb config file
1287         $projects_list ||= $projectroot;
1288
1289         evaluate_query_params();
1290         evaluate_path_info();
1291         evaluate_and_validate_params();
1292         evaluate_git_dir();
1293
1294         configure_gitweb_features();
1295
1296         dispatch();
1297 }
1298
1299 our $is_last_request = sub { 1 };
1300 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1301 our $CGI = 'CGI';
1302 our $cgi;
1303 our $FCGI_Stream_PRINT_raw = \&FCGI::Stream::PRINT;
1304 sub configure_as_fcgi {
1305         require CGI::Fast;
1306         our $CGI = 'CGI::Fast';
1307         # FCGI is not Unicode aware hence the UTF-8 encoding must be done manually.
1308         # However no encoding must be done within git_blob_plain() and git_snapshot()
1309         # which must still output in raw binary mode.
1310         no warnings 'redefine';
1311         my $enc = Encode::find_encoding('UTF-8');
1312         *FCGI::Stream::PRINT = sub {
1313                 my @OUTPUT = @_;
1314                 for (my $i = 1; $i < @_; $i++) {
1315                         $OUTPUT[$i] = $enc->encode($_[$i], Encode::FB_CROAK|Encode::LEAVE_SRC);
1316                 }
1317                 @_ = @OUTPUT;
1318                 goto $FCGI_Stream_PRINT_raw;
1319         };
1320
1321         my $request_number = 0;
1322         # let each child service 100 requests
1323         our $is_last_request = sub { ++$request_number > 100 };
1324 }
1325 sub evaluate_argv {
1326         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1327         configure_as_fcgi()
1328                 if $script_name =~ /\.fcgi$/;
1329
1330         return unless (@ARGV);
1331
1332         require Getopt::Long;
1333         Getopt::Long::GetOptions(
1334                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1335                 'nproc|n=i' => sub {
1336                         my ($arg, $val) = @_;
1337                         return unless eval { require FCGI::ProcManager; 1; };
1338                         my $proc_manager = FCGI::ProcManager->new({
1339                                 n_processes => $val,
1340                         });
1341                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1342                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1343                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1344                 },
1345         );
1346 }
1347
1348 sub run {
1349         evaluate_argv();
1350
1351         $first_request = 1;
1352         $pre_listen_hook->()
1353                 if $pre_listen_hook;
1354
1355  REQUEST:
1356         while ($cgi = $CGI->new()) {
1357                 $pre_dispatch_hook->()
1358                         if $pre_dispatch_hook;
1359
1360                 run_request();
1361
1362                 $post_dispatch_hook->()
1363                         if $post_dispatch_hook;
1364                 $first_request = 0;
1365
1366                 last REQUEST if ($is_last_request->());
1367         }
1368
1369  DONE_GITWEB:
1370         1;
1371 }
1372
1373 run();
1374
1375 if (defined caller) {
1376         # wrapped in a subroutine processing requests,
1377         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1378         return;
1379 } else {
1380         # pure CGI script, serving single request
1381         exit;
1382 }
1383
1384 ## ======================================================================
1385 ## action links
1386
1387 # possible values of extra options
1388 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1389 # -replay => 1      - start from a current view (replay with modifications)
1390 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1391 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1392 sub href {
1393         my %params = @_;
1394         # default is to use -absolute url() i.e. $my_uri
1395         my $href = $params{-full} ? $my_url : $my_uri;
1396
1397         # implicit -replay, must be first of implicit params
1398         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1399
1400         $params{'project'} = $project unless exists $params{'project'};
1401
1402         if ($params{-replay}) {
1403                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1404                         if (!exists $params{$name}) {
1405                                 $params{$name} = $input_params{$name};
1406                         }
1407                 }
1408         }
1409
1410         my $use_pathinfo = gitweb_check_feature('pathinfo');
1411         if (defined $params{'project'} &&
1412             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1413                 # try to put as many parameters as possible in PATH_INFO:
1414                 #   - project name
1415                 #   - action
1416                 #   - hash_parent or hash_parent_base:/file_parent
1417                 #   - hash or hash_base:/filename
1418                 #   - the snapshot_format as an appropriate suffix
1419
1420                 # When the script is the root DirectoryIndex for the domain,
1421                 # $href here would be something like http://gitweb.example.com/
1422                 # Thus, we strip any trailing / from $href, to spare us double
1423                 # slashes in the final URL
1424                 $href =~ s,/$,,;
1425
1426                 # Then add the project name, if present
1427                 $href .= "/".esc_path_info($params{'project'});
1428                 delete $params{'project'};
1429
1430                 # since we destructively absorb parameters, we keep this
1431                 # boolean that remembers if we're handling a snapshot
1432                 my $is_snapshot = $params{'action'} eq 'snapshot';
1433
1434                 # Summary just uses the project path URL, any other action is
1435                 # added to the URL
1436                 if (defined $params{'action'}) {
1437                         $href .= "/".esc_path_info($params{'action'})
1438                                 unless $params{'action'} eq 'summary';
1439                         delete $params{'action'};
1440                 }
1441
1442                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1443                 # stripping nonexistent or useless pieces
1444                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1445                         || $params{'hash_parent'} || $params{'hash'});
1446                 if (defined $params{'hash_base'}) {
1447                         if (defined $params{'hash_parent_base'}) {
1448                                 $href .= esc_path_info($params{'hash_parent_base'});
1449                                 # skip the file_parent if it's the same as the file_name
1450                                 if (defined $params{'file_parent'}) {
1451                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1452                                                 delete $params{'file_parent'};
1453                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1454                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1455                                                 delete $params{'file_parent'};
1456                                         }
1457                                 }
1458                                 $href .= "..";
1459                                 delete $params{'hash_parent'};
1460                                 delete $params{'hash_parent_base'};
1461                         } elsif (defined $params{'hash_parent'}) {
1462                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1463                                 delete $params{'hash_parent'};
1464                         }
1465
1466                         $href .= esc_path_info($params{'hash_base'});
1467                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1468                                 $href .= ":/".esc_path_info($params{'file_name'});
1469                                 delete $params{'file_name'};
1470                         }
1471                         delete $params{'hash'};
1472                         delete $params{'hash_base'};
1473                 } elsif (defined $params{'hash'}) {
1474                         $href .= esc_path_info($params{'hash'});
1475                         delete $params{'hash'};
1476                 }
1477
1478                 # If the action was a snapshot, we can absorb the
1479                 # snapshot_format parameter too
1480                 if ($is_snapshot) {
1481                         my $fmt = $params{'snapshot_format'};
1482                         # snapshot_format should always be defined when href()
1483                         # is called, but just in case some code forgets, we
1484                         # fall back to the default
1485                         $fmt ||= $snapshot_fmts[0];
1486                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1487                         delete $params{'snapshot_format'};
1488                 }
1489         }
1490
1491         # now encode the parameters explicitly
1492         my @result = ();
1493         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1494                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1495                 if (defined $params{$name}) {
1496                         if (ref($params{$name}) eq "ARRAY") {
1497                                 foreach my $par (@{$params{$name}}) {
1498                                         push @result, $symbol . "=" . esc_param($par);
1499                                 }
1500                         } else {
1501                                 push @result, $symbol . "=" . esc_param($params{$name});
1502                         }
1503                 }
1504         }
1505         $href .= "?" . join(';', @result) if scalar @result;
1506
1507         # final transformation: trailing spaces must be escaped (URI-encoded)
1508         $href =~ s/(\s+)$/CGI::escape($1)/e;
1509
1510         if ($params{-anchor}) {
1511                 $href .= "#".esc_param($params{-anchor});
1512         }
1513
1514         return $href;
1515 }
1516
1517
1518 ## ======================================================================
1519 ## validation, quoting/unquoting and escaping
1520
1521 sub is_valid_action {
1522         my $input = shift;
1523         return undef unless exists $actions{$input};
1524         return 1;
1525 }
1526
1527 sub is_valid_project {
1528         my $input = shift;
1529
1530         return unless defined $input;
1531         if (!is_valid_pathname($input) ||
1532                 !(-d "$projectroot/$input") ||
1533                 !check_export_ok("$projectroot/$input") ||
1534                 ($strict_export && !project_in_list($input))) {
1535                 return undef;
1536         } else {
1537                 return 1;
1538         }
1539 }
1540
1541 sub is_valid_pathname {
1542         my $input = shift;
1543
1544         return undef unless defined $input;
1545         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1546         # at the beginning, at the end, and between slashes.
1547         # also this catches doubled slashes
1548         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1549                 return undef;
1550         }
1551         # no null characters
1552         if ($input =~ m!\0!) {
1553                 return undef;
1554         }
1555         return 1;
1556 }
1557
1558 sub is_valid_ref_format {
1559         my $input = shift;
1560
1561         return undef unless defined $input;
1562         # restrictions on ref name according to git-check-ref-format
1563         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1564                 return undef;
1565         }
1566         return 1;
1567 }
1568
1569 sub is_valid_refname {
1570         my $input = shift;
1571
1572         return undef unless defined $input;
1573         # textual hashes are O.K.
1574         if ($input =~ m/^$oid_regex$/) {
1575                 return 1;
1576         }
1577         # it must be correct pathname
1578         is_valid_pathname($input) or return undef;
1579         # check git-check-ref-format restrictions
1580         is_valid_ref_format($input) or return undef;
1581         return 1;
1582 }
1583
1584 # decode sequences of octets in utf8 into Perl's internal form,
1585 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1586 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1587 sub to_utf8 {
1588         my $str = shift;
1589         return undef unless defined $str;
1590
1591         if (utf8::is_utf8($str) || utf8::decode($str)) {
1592                 return $str;
1593         } else {
1594                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1595         }
1596 }
1597
1598 # quote unsafe chars, but keep the slash, even when it's not
1599 # correct, but quoted slashes look too horrible in bookmarks
1600 sub esc_param {
1601         my $str = shift;
1602         return undef unless defined $str;
1603         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1604         $str =~ s/ /\+/g;
1605         return $str;
1606 }
1607
1608 # the quoting rules for path_info fragment are slightly different
1609 sub esc_path_info {
1610         my $str = shift;
1611         return undef unless defined $str;
1612
1613         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1614         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1615
1616         return $str;
1617 }
1618
1619 # quote unsafe chars in whole URL, so some characters cannot be quoted
1620 sub esc_url {
1621         my $str = shift;
1622         return undef unless defined $str;
1623         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1624         $str =~ s/ /\+/g;
1625         return $str;
1626 }
1627
1628 # quote unsafe characters in HTML attributes
1629 sub esc_attr {
1630
1631         # for XHTML conformance escaping '"' to '&quot;' is not enough
1632         return esc_html(@_);
1633 }
1634
1635 # replace invalid utf8 character with SUBSTITUTION sequence
1636 sub esc_html {
1637         my $str = shift;
1638         my %opts = @_;
1639
1640         return undef unless defined $str;
1641
1642         $str = to_utf8($str);
1643         $str = $cgi->escapeHTML($str);
1644         if ($opts{'-nbsp'}) {
1645                 $str =~ s/ /&nbsp;/g;
1646         }
1647         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1648         return $str;
1649 }
1650
1651 # quote control characters and escape filename to HTML
1652 sub esc_path {
1653         my $str = shift;
1654         my %opts = @_;
1655
1656         return undef unless defined $str;
1657
1658         $str = to_utf8($str);
1659         $str = $cgi->escapeHTML($str);
1660         if ($opts{'-nbsp'}) {
1661                 $str =~ s/ /&nbsp;/g;
1662         }
1663         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1664         return $str;
1665 }
1666
1667 # Sanitize for use in XHTML + application/xml+xhtml (valid XML 1.0)
1668 sub sanitize {
1669         my $str = shift;
1670
1671         return undef unless defined $str;
1672
1673         $str = to_utf8($str);
1674         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1675         return $str;
1676 }
1677
1678 # Make control characters "printable", using character escape codes (CEC)
1679 sub quot_cec {
1680         my $cntrl = shift;
1681         my %opts = @_;
1682         my %es = ( # character escape codes, aka escape sequences
1683                 "\t" => '\t',   # tab             (HT)
1684                 "\n" => '\n',   # line feed       (LF)
1685                 "\r" => '\r',   # carriage return (CR)
1686                 "\f" => '\f',   # form feed       (FF)
1687                 "\b" => '\b',   # backspace       (BS)
1688                 "\a" => '\a',   # alarm (bell)    (BEL)
1689                 "\e" => '\e',   # escape          (ESC)
1690                 "\013" => '\v', # vertical tab    (VT)
1691                 "\000" => '\0', # nul character   (NUL)
1692         );
1693         my $chr = ( (exists $es{$cntrl})
1694                     ? $es{$cntrl}
1695                     : sprintf('\%2x', ord($cntrl)) );
1696         if ($opts{-nohtml}) {
1697                 return $chr;
1698         } else {
1699                 return "<span class=\"cntrl\">$chr</span>";
1700         }
1701 }
1702
1703 # Alternatively use unicode control pictures codepoints,
1704 # Unicode "printable representation" (PR)
1705 sub quot_upr {
1706         my $cntrl = shift;
1707         my %opts = @_;
1708
1709         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1710         if ($opts{-nohtml}) {
1711                 return $chr;
1712         } else {
1713                 return "<span class=\"cntrl\">$chr</span>";
1714         }
1715 }
1716
1717 # git may return quoted and escaped filenames
1718 sub unquote {
1719         my $str = shift;
1720
1721         sub unq {
1722                 my $seq = shift;
1723                 my %es = ( # character escape codes, aka escape sequences
1724                         't' => "\t",   # tab            (HT, TAB)
1725                         'n' => "\n",   # newline        (NL)
1726                         'r' => "\r",   # return         (CR)
1727                         'f' => "\f",   # form feed      (FF)
1728                         'b' => "\b",   # backspace      (BS)
1729                         'a' => "\a",   # alarm (bell)   (BEL)
1730                         'e' => "\e",   # escape         (ESC)
1731                         'v' => "\013", # vertical tab   (VT)
1732                 );
1733
1734                 if ($seq =~ m/^[0-7]{1,3}$/) {
1735                         # octal char sequence
1736                         return chr(oct($seq));
1737                 } elsif (exists $es{$seq}) {
1738                         # C escape sequence, aka character escape code
1739                         return $es{$seq};
1740                 }
1741                 # quoted ordinary character
1742                 return $seq;
1743         }
1744
1745         if ($str =~ m/^"(.*)"$/) {
1746                 # needs unquoting
1747                 $str = $1;
1748                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1749         }
1750         return $str;
1751 }
1752
1753 # escape tabs (convert tabs to spaces)
1754 sub untabify {
1755         my $line = shift;
1756
1757         while ((my $pos = index($line, "\t")) != -1) {
1758                 if (my $count = (8 - ($pos % 8))) {
1759                         my $spaces = ' ' x $count;
1760                         $line =~ s/\t/$spaces/;
1761                 }
1762         }
1763
1764         return $line;
1765 }
1766
1767 sub project_in_list {
1768         my $project = shift;
1769         my @list = git_get_projects_list();
1770         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1771 }
1772
1773 ## ----------------------------------------------------------------------
1774 ## HTML aware string manipulation
1775
1776 # Try to chop given string on a word boundary between position
1777 # $len and $len+$add_len. If there is no word boundary there,
1778 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1779 # (marking chopped part) would be longer than given string.
1780 sub chop_str {
1781         my $str = shift;
1782         my $len = shift;
1783         my $add_len = shift || 10;
1784         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1785
1786         # Make sure perl knows it is utf8 encoded so we don't
1787         # cut in the middle of a utf8 multibyte char.
1788         $str = to_utf8($str);
1789
1790         # allow only $len chars, but don't cut a word if it would fit in $add_len
1791         # if it doesn't fit, cut it if it's still longer than the dots we would add
1792         # remove chopped character entities entirely
1793
1794         # when chopping in the middle, distribute $len into left and right part
1795         # return early if chopping wouldn't make string shorter
1796         if ($where eq 'center') {
1797                 return $str if ($len + 5 >= length($str)); # filler is length 5
1798                 $len = int($len/2);
1799         } else {
1800                 return $str if ($len + 4 >= length($str)); # filler is length 4
1801         }
1802
1803         # regexps: ending and beginning with word part up to $add_len
1804         my $endre = qr/.{$len}\w{0,$add_len}/;
1805         my $begre = qr/\w{0,$add_len}.{$len}/;
1806
1807         if ($where eq 'left') {
1808                 $str =~ m/^(.*?)($begre)$/;
1809                 my ($lead, $body) = ($1, $2);
1810                 if (length($lead) > 4) {
1811                         $lead = " ...";
1812                 }
1813                 return "$lead$body";
1814
1815         } elsif ($where eq 'center') {
1816                 $str =~ m/^($endre)(.*)$/;
1817                 my ($left, $str)  = ($1, $2);
1818                 $str =~ m/^(.*?)($begre)$/;
1819                 my ($mid, $right) = ($1, $2);
1820                 if (length($mid) > 5) {
1821                         $mid = " ... ";
1822                 }
1823                 return "$left$mid$right";
1824
1825         } else {
1826                 $str =~ m/^($endre)(.*)$/;
1827                 my $body = $1;
1828                 my $tail = $2;
1829                 if (length($tail) > 4) {
1830                         $tail = "... ";
1831                 }
1832                 return "$body$tail";
1833         }
1834 }
1835
1836 # takes the same arguments as chop_str, but also wraps a <span> around the
1837 # result with a title attribute if it does get chopped. Additionally, the
1838 # string is HTML-escaped.
1839 sub chop_and_escape_str {
1840         my ($str) = @_;
1841
1842         my $chopped = chop_str(@_);
1843         $str = to_utf8($str);
1844         if ($chopped eq $str) {
1845                 return esc_html($chopped);
1846         } else {
1847                 $str =~ s/[[:cntrl:]]/?/g;
1848                 return $cgi->span({-title=>$str}, esc_html($chopped));
1849         }
1850 }
1851
1852 # Highlight selected fragments of string, using given CSS class,
1853 # and escape HTML.  It is assumed that fragments do not overlap.
1854 # Regions are passed as list of pairs (array references).
1855 #
1856 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1857 # '<span class="mark">foo</span>bar'
1858 sub esc_html_hl_regions {
1859         my ($str, $css_class, @sel) = @_;
1860         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1861         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1862         return esc_html($str, %opts) unless @sel;
1863
1864         my $out = '';
1865         my $pos = 0;
1866
1867         for my $s (@sel) {
1868                 my ($begin, $end) = @$s;
1869
1870                 # Don't create empty <span> elements.
1871                 next if $end <= $begin;
1872
1873                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1874                                        %opts);
1875
1876                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1877                         if ($begin - $pos > 0);
1878                 $out .= $cgi->span({-class => $css_class}, $escaped);
1879
1880                 $pos = $end;
1881         }
1882         $out .= esc_html(substr($str, $pos), %opts)
1883                 if ($pos < length($str));
1884
1885         return $out;
1886 }
1887
1888 # return positions of beginning and end of each match
1889 sub matchpos_list {
1890         my ($str, $regexp) = @_;
1891         return unless (defined $str && defined $regexp);
1892
1893         my @matches;
1894         while ($str =~ /$regexp/g) {
1895                 push @matches, [$-[0], $+[0]];
1896         }
1897         return @matches;
1898 }
1899
1900 # highlight match (if any), and escape HTML
1901 sub esc_html_match_hl {
1902         my ($str, $regexp) = @_;
1903         return esc_html($str) unless defined $regexp;
1904
1905         my @matches = matchpos_list($str, $regexp);
1906         return esc_html($str) unless @matches;
1907
1908         return esc_html_hl_regions($str, 'match', @matches);
1909 }
1910
1911
1912 # highlight match (if any) of shortened string, and escape HTML
1913 sub esc_html_match_hl_chopped {
1914         my ($str, $chopped, $regexp) = @_;
1915         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1916
1917         my @matches = matchpos_list($str, $regexp);
1918         return esc_html($chopped) unless @matches;
1919
1920         # filter matches so that we mark chopped string
1921         my $tail = "... "; # see chop_str
1922         unless ($chopped =~ s/\Q$tail\E$//) {
1923                 $tail = '';
1924         }
1925         my $chop_len = length($chopped);
1926         my $tail_len = length($tail);
1927         my @filtered;
1928
1929         for my $m (@matches) {
1930                 if ($m->[0] > $chop_len) {
1931                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1932                         last;
1933                 } elsif ($m->[1] > $chop_len) {
1934                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1935                         last;
1936                 }
1937                 push @filtered, $m;
1938         }
1939
1940         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1941 }
1942
1943 ## ----------------------------------------------------------------------
1944 ## functions returning short strings
1945
1946 # CSS class for given age value (in seconds)
1947 sub age_class {
1948         my $age = shift;
1949
1950         if (!defined $age) {
1951                 return "noage";
1952         } elsif ($age < 60*60*2) {
1953                 return "age0";
1954         } elsif ($age < 60*60*24*2) {
1955                 return "age1";
1956         } else {
1957                 return "age2";
1958         }
1959 }
1960
1961 # convert age in seconds to "nn units ago" string
1962 sub age_string {
1963         my $age = shift;
1964         my $age_str;
1965
1966         if ($age > 60*60*24*365*2) {
1967                 $age_str = (int $age/60/60/24/365);
1968                 $age_str .= " years ago";
1969         } elsif ($age > 60*60*24*(365/12)*2) {
1970                 $age_str = int $age/60/60/24/(365/12);
1971                 $age_str .= " months ago";
1972         } elsif ($age > 60*60*24*7*2) {
1973                 $age_str = int $age/60/60/24/7;
1974                 $age_str .= " weeks ago";
1975         } elsif ($age > 60*60*24*2) {
1976                 $age_str = int $age/60/60/24;
1977                 $age_str .= " days ago";
1978         } elsif ($age > 60*60*2) {
1979                 $age_str = int $age/60/60;
1980                 $age_str .= " hours ago";
1981         } elsif ($age > 60*2) {
1982                 $age_str = int $age/60;
1983                 $age_str .= " min ago";
1984         } elsif ($age > 2) {
1985                 $age_str = int $age;
1986                 $age_str .= " sec ago";
1987         } else {
1988                 $age_str .= " right now";
1989         }
1990         return $age_str;
1991 }
1992
1993 use constant {
1994         S_IFINVALID => 0030000,
1995         S_IFGITLINK => 0160000,
1996 };
1997
1998 # submodule/subproject, a commit object reference
1999 sub S_ISGITLINK {
2000         my $mode = shift;
2001
2002         return (($mode & S_IFMT) == S_IFGITLINK)
2003 }
2004
2005 # convert file mode in octal to symbolic file mode string
2006 sub mode_str {
2007         my $mode = oct shift;
2008
2009         if (S_ISGITLINK($mode)) {
2010                 return 'm---------';
2011         } elsif (S_ISDIR($mode & S_IFMT)) {
2012                 return 'drwxr-xr-x';
2013         } elsif (S_ISLNK($mode)) {
2014                 return 'lrwxrwxrwx';
2015         } elsif (S_ISREG($mode)) {
2016                 # git cares only about the executable bit
2017                 if ($mode & S_IXUSR) {
2018                         return '-rwxr-xr-x';
2019                 } else {
2020                         return '-rw-r--r--';
2021                 };
2022         } else {
2023                 return '----------';
2024         }
2025 }
2026
2027 # convert file mode in octal to file type string
2028 sub file_type {
2029         my $mode = shift;
2030
2031         if ($mode !~ m/^[0-7]+$/) {
2032                 return $mode;
2033         } else {
2034                 $mode = oct $mode;
2035         }
2036
2037         if (S_ISGITLINK($mode)) {
2038                 return "submodule";
2039         } elsif (S_ISDIR($mode & S_IFMT)) {
2040                 return "directory";
2041         } elsif (S_ISLNK($mode)) {
2042                 return "symlink";
2043         } elsif (S_ISREG($mode)) {
2044                 return "file";
2045         } else {
2046                 return "unknown";
2047         }
2048 }
2049
2050 # convert file mode in octal to file type description string
2051 sub file_type_long {
2052         my $mode = shift;
2053
2054         if ($mode !~ m/^[0-7]+$/) {
2055                 return $mode;
2056         } else {
2057                 $mode = oct $mode;
2058         }
2059
2060         if (S_ISGITLINK($mode)) {
2061                 return "submodule";
2062         } elsif (S_ISDIR($mode & S_IFMT)) {
2063                 return "directory";
2064         } elsif (S_ISLNK($mode)) {
2065                 return "symlink";
2066         } elsif (S_ISREG($mode)) {
2067                 if ($mode & S_IXUSR) {
2068                         return "executable";
2069                 } else {
2070                         return "file";
2071                 };
2072         } else {
2073                 return "unknown";
2074         }
2075 }
2076
2077
2078 ## ----------------------------------------------------------------------
2079 ## functions returning short HTML fragments, or transforming HTML fragments
2080 ## which don't belong to other sections
2081
2082 # format line of commit message.
2083 sub format_log_line_html {
2084         my $line = shift;
2085
2086         # Potentially abbreviated OID.
2087         my $regex = oid_nlen_regex("7,64");
2088
2089         $line = esc_html($line, -nbsp=>1);
2090         $line =~ s{
2091         \b
2092         (
2093             # The output of "git describe", e.g. v2.10.0-297-gf6727b0
2094             # or hadoop-20160921-113441-20-g094fb7d
2095             (?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
2096             [A-Za-z0-9.-]+
2097             (?!\.) # refs can't end with ".", see check_refname_format()
2098             -g$regex
2099             |
2100             # Just a normal looking Git SHA1
2101             $regex
2102         )
2103         \b
2104     }{
2105                 $cgi->a({-href => href(action=>"object", hash=>$1),
2106                                         -class => "text"}, $1);
2107         }egx;
2108
2109         return $line;
2110 }
2111
2112 # format marker of refs pointing to given object
2113
2114 # the destination action is chosen based on object type and current context:
2115 # - for annotated tags, we choose the tag view unless it's the current view
2116 #   already, in which case we go to shortlog view
2117 # - for other refs, we keep the current view if we're in history, shortlog or
2118 #   log view, and select shortlog otherwise
2119 sub format_ref_marker {
2120         my ($refs, $id) = @_;
2121         my $markers = '';
2122
2123         if (defined $refs->{$id}) {
2124                 foreach my $ref (@{$refs->{$id}}) {
2125                         # this code exploits the fact that non-lightweight tags are the
2126                         # only indirect objects, and that they are the only objects for which
2127                         # we want to use tag instead of shortlog as action
2128                         my ($type, $name) = qw();
2129                         my $indirect = ($ref =~ s/\^\{\}$//);
2130                         # e.g. tags/v2.6.11 or heads/next
2131                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2132                                 $type = $1;
2133                                 $name = $2;
2134                         } else {
2135                                 $type = "ref";
2136                                 $name = $ref;
2137                         }
2138
2139                         my $class = $type;
2140                         $class .= " indirect" if $indirect;
2141
2142                         my $dest_action = "shortlog";
2143
2144                         if ($indirect) {
2145                                 $dest_action = "tag" unless $action eq "tag";
2146                         } elsif ($action =~ /^(history|(short)?log)$/) {
2147                                 $dest_action = $action;
2148                         }
2149
2150                         my $dest = "";
2151                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2152                         $dest .= $ref;
2153
2154                         my $link = $cgi->a({
2155                                 -href => href(
2156                                         action=>$dest_action,
2157                                         hash=>$dest
2158                                 )}, esc_html($name));
2159
2160                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2161                                 $link . "</span>";
2162                 }
2163         }
2164
2165         if ($markers) {
2166                 return ' <span class="refs">'. $markers . '</span>';
2167         } else {
2168                 return "";
2169         }
2170 }
2171
2172 # format, perhaps shortened and with markers, title line
2173 sub format_subject_html {
2174         my ($long, $short, $href, $extra) = @_;
2175         $extra = '' unless defined($extra);
2176
2177         if (length($short) < length($long)) {
2178                 $long =~ s/[[:cntrl:]]/?/g;
2179                 return $cgi->a({-href => $href, -class => "list subject",
2180                                 -title => to_utf8($long)},
2181                        esc_html($short)) . $extra;
2182         } else {
2183                 return $cgi->a({-href => $href, -class => "list subject"},
2184                        esc_html($long)) . $extra;
2185         }
2186 }
2187
2188 # Rather than recomputing the url for an email multiple times, we cache it
2189 # after the first hit. This gives a visible benefit in views where the avatar
2190 # for the same email is used repeatedly (e.g. shortlog).
2191 # The cache is shared by all avatar engines (currently gravatar only), which
2192 # are free to use it as preferred. Since only one avatar engine is used for any
2193 # given page, there's no risk for cache conflicts.
2194 our %avatar_cache = ();
2195
2196 # Compute the picon url for a given email, by using the picon search service over at
2197 # http://www.cs.indiana.edu/picons/search.html
2198 sub picon_url {
2199         my $email = lc shift;
2200         if (!$avatar_cache{$email}) {
2201                 my ($user, $domain) = split('@', $email);
2202                 $avatar_cache{$email} =
2203                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2204                         "$domain/$user/" .
2205                         "users+domains+unknown/up/single";
2206         }
2207         return $avatar_cache{$email};
2208 }
2209
2210 # Compute the gravatar url for a given email, if it's not in the cache already.
2211 # Gravatar stores only the part of the URL before the size, since that's the
2212 # one computationally more expensive. This also allows reuse of the cache for
2213 # different sizes (for this particular engine).
2214 sub gravatar_url {
2215         my $email = lc shift;
2216         my $size = shift;
2217         $avatar_cache{$email} ||=
2218                 "//www.gravatar.com/avatar/" .
2219                         md5_hex($email) . "?s=";
2220         return $avatar_cache{$email} . $size;
2221 }
2222
2223 # Insert an avatar for the given $email at the given $size if the feature
2224 # is enabled.
2225 sub git_get_avatar {
2226         my ($email, %opts) = @_;
2227         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2228         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2229         $opts{-size} ||= 'default';
2230         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2231         my $url = "";
2232         if ($git_avatar eq 'gravatar') {
2233                 $url = gravatar_url($email, $size);
2234         } elsif ($git_avatar eq 'picon') {
2235                 $url = picon_url($email);
2236         }
2237         # Other providers can be added by extending the if chain, defining $url
2238         # as needed. If no variant puts something in $url, we assume avatars
2239         # are completely disabled/unavailable.
2240         if ($url) {
2241                 return $pre_white .
2242                        "<img width=\"$size\" " .
2243                             "class=\"avatar\" " .
2244                             "src=\"".esc_url($url)."\" " .
2245                             "alt=\"\" " .
2246                        "/>" . $post_white;
2247         } else {
2248                 return "";
2249         }
2250 }
2251
2252 sub format_search_author {
2253         my ($author, $searchtype, $displaytext) = @_;
2254         my $have_search = gitweb_check_feature('search');
2255
2256         if ($have_search) {
2257                 my $performed = "";
2258                 if ($searchtype eq 'author') {
2259                         $performed = "authored";
2260                 } elsif ($searchtype eq 'committer') {
2261                         $performed = "committed";
2262                 }
2263
2264                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2265                                 searchtext=>$author,
2266                                 searchtype=>$searchtype), class=>"list",
2267                                 title=>"Search for commits $performed by $author"},
2268                                 $displaytext);
2269
2270         } else {
2271                 return $displaytext;
2272         }
2273 }
2274
2275 # format the author name of the given commit with the given tag
2276 # the author name is chopped and escaped according to the other
2277 # optional parameters (see chop_str).
2278 sub format_author_html {
2279         my $tag = shift;
2280         my $co = shift;
2281         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2282         return "<$tag class=\"author\">" .
2283                format_search_author($co->{'author_name'}, "author",
2284                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2285                        $author) .
2286                "</$tag>";
2287 }
2288
2289 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2290 sub format_git_diff_header_line {
2291         my $line = shift;
2292         my $diffinfo = shift;
2293         my ($from, $to) = @_;
2294
2295         if ($diffinfo->{'nparents'}) {
2296                 # combined diff
2297                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2298                 if ($to->{'href'}) {
2299                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2300                                          esc_path($to->{'file'}));
2301                 } else { # file was deleted (no href)
2302                         $line .= esc_path($to->{'file'});
2303                 }
2304         } else {
2305                 # "ordinary" diff
2306                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2307                 if ($from->{'href'}) {
2308                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2309                                          'a/' . esc_path($from->{'file'}));
2310                 } else { # file was added (no href)
2311                         $line .= 'a/' . esc_path($from->{'file'});
2312                 }
2313                 $line .= ' ';
2314                 if ($to->{'href'}) {
2315                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2316                                          'b/' . esc_path($to->{'file'}));
2317                 } else { # file was deleted
2318                         $line .= 'b/' . esc_path($to->{'file'});
2319                 }
2320         }
2321
2322         return "<div class=\"diff header\">$line</div>\n";
2323 }
2324
2325 # format extended diff header line, before patch itself
2326 sub format_extended_diff_header_line {
2327         my $line = shift;
2328         my $diffinfo = shift;
2329         my ($from, $to) = @_;
2330
2331         # match <path>
2332         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2333                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2334                                        esc_path($from->{'file'}));
2335         }
2336         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2337                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2338                                  esc_path($to->{'file'}));
2339         }
2340         # match single <mode>
2341         if ($line =~ m/\s(\d{6})$/) {
2342                 $line .= '<span class="info"> (' .
2343                          file_type_long($1) .
2344                          ')</span>';
2345         }
2346         # match <hash>
2347         if ($line =~ oid_nlen_prefix_infix_regex($sha1_len, "index ", ",") |
2348             $line =~ oid_nlen_prefix_infix_regex($sha256_len, "index ", ",")) {
2349                 # can match only for combined diff
2350                 $line = 'index ';
2351                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2352                         if ($from->{'href'}[$i]) {
2353                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2354                                                   -class=>"hash"},
2355                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2356                         } else {
2357                                 $line .= '0' x 7;
2358                         }
2359                         # separator
2360                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2361                 }
2362                 $line .= '..';
2363                 if ($to->{'href'}) {
2364                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2365                                          substr($diffinfo->{'to_id'},0,7));
2366                 } else {
2367                         $line .= '0' x 7;
2368                 }
2369
2370         } elsif ($line =~ oid_nlen_prefix_infix_regex($sha1_len, "index ", "..") |
2371                  $line =~ oid_nlen_prefix_infix_regex($sha256_len, "index ", "..")) {
2372                 # can match only for ordinary diff
2373                 my ($from_link, $to_link);
2374                 if ($from->{'href'}) {
2375                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2376                                              substr($diffinfo->{'from_id'},0,7));
2377                 } else {
2378                         $from_link = '0' x 7;
2379                 }
2380                 if ($to->{'href'}) {
2381                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2382                                            substr($diffinfo->{'to_id'},0,7));
2383                 } else {
2384                         $to_link = '0' x 7;
2385                 }
2386                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2387                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2388         }
2389
2390         return $line . "<br/>\n";
2391 }
2392
2393 # format from-file/to-file diff header
2394 sub format_diff_from_to_header {
2395         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2396         my $line;
2397         my $result = '';
2398
2399         $line = $from_line;
2400         #assert($line =~ m/^---/) if DEBUG;
2401         # no extra formatting for "^--- /dev/null"
2402         if (! $diffinfo->{'nparents'}) {
2403                 # ordinary (single parent) diff
2404                 if ($line =~ m!^--- "?a/!) {
2405                         if ($from->{'href'}) {
2406                                 $line = '--- a/' .
2407                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2408                                                 esc_path($from->{'file'}));
2409                         } else {
2410                                 $line = '--- a/' .
2411                                         esc_path($from->{'file'});
2412                         }
2413                 }
2414                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2415
2416         } else {
2417                 # combined diff (merge commit)
2418                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2419                         if ($from->{'href'}[$i]) {
2420                                 $line = '--- ' .
2421                                         $cgi->a({-href=>href(action=>"blobdiff",
2422                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2423                                                              hash_parent_base=>$parents[$i],
2424                                                              file_parent=>$from->{'file'}[$i],
2425                                                              hash=>$diffinfo->{'to_id'},
2426                                                              hash_base=>$hash,
2427                                                              file_name=>$to->{'file'}),
2428                                                  -class=>"path",
2429                                                  -title=>"diff" . ($i+1)},
2430                                                 $i+1) .
2431                                         '/' .
2432                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2433                                                 esc_path($from->{'file'}[$i]));
2434                         } else {
2435                                 $line = '--- /dev/null';
2436                         }
2437                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2438                 }
2439         }
2440
2441         $line = $to_line;
2442         #assert($line =~ m/^\+\+\+/) if DEBUG;
2443         # no extra formatting for "^+++ /dev/null"
2444         if ($line =~ m!^\+\+\+ "?b/!) {
2445                 if ($to->{'href'}) {
2446                         $line = '+++ b/' .
2447                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2448                                         esc_path($to->{'file'}));
2449                 } else {
2450                         $line = '+++ b/' .
2451                                 esc_path($to->{'file'});
2452                 }
2453         }
2454         $result .= qq!<div class="diff to_file">$line</div>\n!;
2455
2456         return $result;
2457 }
2458
2459 # create note for patch simplified by combined diff
2460 sub format_diff_cc_simplified {
2461         my ($diffinfo, @parents) = @_;
2462         my $result = '';
2463
2464         $result .= "<div class=\"diff header\">" .
2465                    "diff --cc ";
2466         if (!is_deleted($diffinfo)) {
2467                 $result .= $cgi->a({-href => href(action=>"blob",
2468                                                   hash_base=>$hash,
2469                                                   hash=>$diffinfo->{'to_id'},
2470                                                   file_name=>$diffinfo->{'to_file'}),
2471                                     -class => "path"},
2472                                    esc_path($diffinfo->{'to_file'}));
2473         } else {
2474                 $result .= esc_path($diffinfo->{'to_file'});
2475         }
2476         $result .= "</div>\n" . # class="diff header"
2477                    "<div class=\"diff nodifferences\">" .
2478                    "Simple merge" .
2479                    "</div>\n"; # class="diff nodifferences"
2480
2481         return $result;
2482 }
2483
2484 sub diff_line_class {
2485         my ($line, $from, $to) = @_;
2486
2487         # ordinary diff
2488         my $num_sign = 1;
2489         # combined diff
2490         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2491                 $num_sign = scalar @{$from->{'href'}};
2492         }
2493
2494         my @diff_line_classifier = (
2495                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2496                 { regexp => qr/^\\/,               class => "incomplete"  },
2497                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2498                 # classifier for context must come before classifier add/rem,
2499                 # or we would have to use more complicated regexp, for example
2500                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2501                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2502                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2503         );
2504         for my $clsfy (@diff_line_classifier) {
2505                 return $clsfy->{'class'}
2506                         if ($line =~ $clsfy->{'regexp'});
2507         }
2508
2509         # fallback
2510         return "";
2511 }
2512
2513 # assumes that $from and $to are defined and correctly filled,
2514 # and that $line holds a line of chunk header for unified diff
2515 sub format_unidiff_chunk_header {
2516         my ($line, $from, $to) = @_;
2517
2518         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2519                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2520
2521         $from_lines = 0 unless defined $from_lines;
2522         $to_lines   = 0 unless defined $to_lines;
2523
2524         if ($from->{'href'}) {
2525                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2526                                      -class=>"list"}, $from_text);
2527         }
2528         if ($to->{'href'}) {
2529                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2530                                      -class=>"list"}, $to_text);
2531         }
2532         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2533                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2534         return $line;
2535 }
2536
2537 # assumes that $from and $to are defined and correctly filled,
2538 # and that $line holds a line of chunk header for combined diff
2539 sub format_cc_diff_chunk_header {
2540         my ($line, $from, $to) = @_;
2541
2542         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2543         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2544
2545         @from_text = split(' ', $ranges);
2546         for (my $i = 0; $i < @from_text; ++$i) {
2547                 ($from_start[$i], $from_nlines[$i]) =
2548                         (split(',', substr($from_text[$i], 1)), 0);
2549         }
2550
2551         $to_text   = pop @from_text;
2552         $to_start  = pop @from_start;
2553         $to_nlines = pop @from_nlines;
2554
2555         $line = "<span class=\"chunk_info\">$prefix ";
2556         for (my $i = 0; $i < @from_text; ++$i) {
2557                 if ($from->{'href'}[$i]) {
2558                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2559                                           -class=>"list"}, $from_text[$i]);
2560                 } else {
2561                         $line .= $from_text[$i];
2562                 }
2563                 $line .= " ";
2564         }
2565         if ($to->{'href'}) {
2566                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2567                                   -class=>"list"}, $to_text);
2568         } else {
2569                 $line .= $to_text;
2570         }
2571         $line .= " $prefix</span>" .
2572                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2573         return $line;
2574 }
2575
2576 # process patch (diff) line (not to be used for diff headers),
2577 # returning HTML-formatted (but not wrapped) line.
2578 # If the line is passed as a reference, it is treated as HTML and not
2579 # esc_html()'ed.
2580 sub format_diff_line {
2581         my ($line, $diff_class, $from, $to) = @_;
2582
2583         if (ref($line)) {
2584                 $line = $$line;
2585         } else {
2586                 chomp $line;
2587                 $line = untabify($line);
2588
2589                 if ($from && $to && $line =~ m/^\@{2} /) {
2590                         $line = format_unidiff_chunk_header($line, $from, $to);
2591                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2592                         $line = format_cc_diff_chunk_header($line, $from, $to);
2593                 } else {
2594                         $line = esc_html($line, -nbsp=>1);
2595                 }
2596         }
2597
2598         my $diff_classes = "diff";
2599         $diff_classes .= " $diff_class" if ($diff_class);
2600         $line = "<div class=\"$diff_classes\">$line</div>\n";
2601
2602         return $line;
2603 }
2604
2605 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2606 # linked.  Pass the hash of the tree/commit to snapshot.
2607 sub format_snapshot_links {
2608         my ($hash) = @_;
2609         my $num_fmts = @snapshot_fmts;
2610         if ($num_fmts > 1) {
2611                 # A parenthesized list of links bearing format names.
2612                 # e.g. "snapshot (_tar.gz_ _zip_)"
2613                 return "snapshot (" . join(' ', map
2614                         $cgi->a({
2615                                 -href => href(
2616                                         action=>"snapshot",
2617                                         hash=>$hash,
2618                                         snapshot_format=>$_
2619                                 )
2620                         }, $known_snapshot_formats{$_}{'display'})
2621                 , @snapshot_fmts) . ")";
2622         } elsif ($num_fmts == 1) {
2623                 # A single "snapshot" link whose tooltip bears the format name.
2624                 # i.e. "_snapshot_"
2625                 my ($fmt) = @snapshot_fmts;
2626                 return
2627                         $cgi->a({
2628                                 -href => href(
2629                                         action=>"snapshot",
2630                                         hash=>$hash,
2631                                         snapshot_format=>$fmt
2632                                 ),
2633                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2634                         }, "snapshot");
2635         } else { # $num_fmts == 0
2636                 return undef;
2637         }
2638 }
2639
2640 ## ......................................................................
2641 ## functions returning values to be passed, perhaps after some
2642 ## transformation, to other functions; e.g. returning arguments to href()
2643
2644 # returns hash to be passed to href to generate gitweb URL
2645 # in -title key it returns description of link
2646 sub get_feed_info {
2647         my $format = shift || 'Atom';
2648         my %res = (action => lc($format));
2649         my $matched_ref = 0;
2650
2651         # feed links are possible only for project views
2652         return unless (defined $project);
2653         # some views should link to OPML, or to generic project feed,
2654         # or don't have specific feed yet (so they should use generic)
2655         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2656
2657         my $branch = undef;
2658         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2659         # (fullname) to differentiate from tag links; this also makes
2660         # possible to detect branch links
2661         for my $ref (get_branch_refs()) {
2662                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2663                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2664                         $branch = $1;
2665                         $matched_ref = $ref;
2666                         last;
2667                 }
2668         }
2669         # find log type for feed description (title)
2670         my $type = 'log';
2671         if (defined $file_name) {
2672                 $type  = "history of $file_name";
2673                 $type .= "/" if ($action eq 'tree');
2674                 $type .= " on '$branch'" if (defined $branch);
2675         } else {
2676                 $type = "log of $branch" if (defined $branch);
2677         }
2678
2679         $res{-title} = $type;
2680         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2681         $res{'file_name'} = $file_name;
2682
2683         return %res;
2684 }
2685
2686 ## ----------------------------------------------------------------------
2687 ## git utility subroutines, invoking git commands
2688
2689 # returns path to the core git executable and the --git-dir parameter as list
2690 sub git_cmd {
2691         $number_of_git_cmds++;
2692         return $GIT, '--git-dir='.$git_dir;
2693 }
2694
2695 # quote the given arguments for passing them to the shell
2696 # quote_command("command", "arg 1", "arg with ' and ! characters")
2697 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2698 # Try to avoid using this function wherever possible.
2699 sub quote_command {
2700         return join(' ',
2701                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2702 }
2703
2704 # get HEAD ref of given project as hash
2705 sub git_get_head_hash {
2706         return git_get_full_hash(shift, 'HEAD');
2707 }
2708
2709 sub git_get_full_hash {
2710         return git_get_hash(@_);
2711 }
2712
2713 sub git_get_short_hash {
2714         return git_get_hash(@_, '--short=7');
2715 }
2716
2717 sub git_get_hash {
2718         my ($project, $hash, @options) = @_;
2719         my $o_git_dir = $git_dir;
2720         my $retval = undef;
2721         $git_dir = "$projectroot/$project";
2722         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2723             '--verify', '-q', @options, $hash) {
2724                 $retval = <$fd>;
2725                 chomp $retval if defined $retval;
2726                 close $fd;
2727         }
2728         if (defined $o_git_dir) {
2729                 $git_dir = $o_git_dir;
2730         }
2731         return $retval;
2732 }
2733
2734 # get type of given object
2735 sub git_get_type {
2736         my $hash = shift;
2737
2738         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2739         my $type = <$fd>;
2740         close $fd or return;
2741         chomp $type;
2742         return $type;
2743 }
2744
2745 # repository configuration
2746 our $config_file = '';
2747 our %config;
2748
2749 # store multiple values for single key as anonymous array reference
2750 # single values stored directly in the hash, not as [ <value> ]
2751 sub hash_set_multi {
2752         my ($hash, $key, $value) = @_;
2753
2754         if (!exists $hash->{$key}) {
2755                 $hash->{$key} = $value;
2756         } elsif (!ref $hash->{$key}) {
2757                 $hash->{$key} = [ $hash->{$key}, $value ];
2758         } else {
2759                 push @{$hash->{$key}}, $value;
2760         }
2761 }
2762
2763 # return hash of git project configuration
2764 # optionally limited to some section, e.g. 'gitweb'
2765 sub git_parse_project_config {
2766         my $section_regexp = shift;
2767         my %config;
2768
2769         local $/ = "\0";
2770
2771         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2772                 or return;
2773
2774         while (my $keyval = <$fh>) {
2775                 chomp $keyval;
2776                 my ($key, $value) = split(/\n/, $keyval, 2);
2777
2778                 hash_set_multi(\%config, $key, $value)
2779                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2780         }
2781         close $fh;
2782
2783         return %config;
2784 }
2785
2786 # convert config value to boolean: 'true' or 'false'
2787 # no value, number > 0, 'true' and 'yes' values are true
2788 # rest of values are treated as false (never as error)
2789 sub config_to_bool {
2790         my $val = shift;
2791
2792         return 1 if !defined $val;             # section.key
2793
2794         # strip leading and trailing whitespace
2795         $val =~ s/^\s+//;
2796         $val =~ s/\s+$//;
2797
2798         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2799                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2800 }
2801
2802 # convert config value to simple decimal number
2803 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2804 # to be multiplied by 1024, 1048576, or 1073741824
2805 sub config_to_int {
2806         my $val = shift;
2807
2808         # strip leading and trailing whitespace
2809         $val =~ s/^\s+//;
2810         $val =~ s/\s+$//;
2811
2812         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2813                 $unit = lc($unit);
2814                 # unknown unit is treated as 1
2815                 return $num * ($unit eq 'g' ? 1073741824 :
2816                                $unit eq 'm' ?    1048576 :
2817                                $unit eq 'k' ?       1024 : 1);
2818         }
2819         return $val;
2820 }
2821
2822 # convert config value to array reference, if needed
2823 sub config_to_multi {
2824         my $val = shift;
2825
2826         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2827 }
2828
2829 sub git_get_project_config {
2830         my ($key, $type) = @_;
2831
2832         return unless defined $git_dir;
2833
2834         # key sanity check
2835         return unless ($key);
2836         # only subsection, if exists, is case sensitive,
2837         # and not lowercased by 'git config -z -l'
2838         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2839                 $lo =~ s/_//g;
2840                 $key = join(".", lc($hi), $mi, lc($lo));
2841                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2842         } else {
2843                 $key = lc($key);
2844                 $key =~ s/_//g;
2845                 return if ($key =~ /\W/);
2846         }
2847         $key =~ s/^gitweb\.//;
2848
2849         # type sanity check
2850         if (defined $type) {
2851                 $type =~ s/^--//;
2852                 $type = undef
2853                         unless ($type eq 'bool' || $type eq 'int');
2854         }
2855
2856         # get config
2857         if (!defined $config_file ||
2858             $config_file ne "$git_dir/config") {
2859                 %config = git_parse_project_config('gitweb');
2860                 $config_file = "$git_dir/config";
2861         }
2862
2863         # check if config variable (key) exists
2864         return unless exists $config{"gitweb.$key"};
2865
2866         # ensure given type
2867         if (!defined $type) {
2868                 return $config{"gitweb.$key"};
2869         } elsif ($type eq 'bool') {
2870                 # backward compatibility: 'git config --bool' returns true/false
2871                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2872         } elsif ($type eq 'int') {
2873                 return config_to_int($config{"gitweb.$key"});
2874         }
2875         return $config{"gitweb.$key"};
2876 }
2877
2878 # get hash of given path at given ref
2879 sub git_get_hash_by_path {
2880         my $base = shift;
2881         my $path = shift || return undef;
2882         my $type = shift;
2883
2884         $path =~ s,/+$,,;
2885
2886         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2887                 or die_error(500, "Open git-ls-tree failed");
2888         my $line = <$fd>;
2889         close $fd or return undef;
2890
2891         if (!defined $line) {
2892                 # there is no tree or hash given by $path at $base
2893                 return undef;
2894         }
2895
2896         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2897         $line =~ m/^([0-9]+) (.+) ($oid_regex)\t/;
2898         if (defined $type && $type ne $2) {
2899                 # type doesn't match
2900                 return undef;
2901         }
2902         return $3;
2903 }
2904
2905 # get path of entry with given hash at given tree-ish (ref)
2906 # used to get 'from' filename for combined diff (merge commit) for renames
2907 sub git_get_path_by_hash {
2908         my $base = shift || return;
2909         my $hash = shift || return;
2910
2911         local $/ = "\0";
2912
2913         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2914                 or return undef;
2915         while (my $line = <$fd>) {
2916                 chomp $line;
2917
2918                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2919                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2920                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2921                         close $fd;
2922                         return $1;
2923                 }
2924         }
2925         close $fd;
2926         return undef;
2927 }
2928
2929 ## ......................................................................
2930 ## git utility functions, directly accessing git repository
2931
2932 # get the value of config variable either from file named as the variable
2933 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2934 # configuration variable in the repository config file.
2935 sub git_get_file_or_project_config {
2936         my ($path, $name) = @_;
2937
2938         $git_dir = "$projectroot/$path";
2939         open my $fd, '<', "$git_dir/$name"
2940                 or return git_get_project_config($name);
2941         my $conf = <$fd>;
2942         close $fd;
2943         if (defined $conf) {
2944                 chomp $conf;
2945         }
2946         return $conf;
2947 }
2948
2949 sub git_get_project_description {
2950         my $path = shift;
2951         return git_get_file_or_project_config($path, 'description');
2952 }
2953
2954 sub git_get_project_category {
2955         my $path = shift;
2956         return git_get_file_or_project_config($path, 'category');
2957 }
2958
2959
2960 # supported formats:
2961 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2962 #   - if its contents is a number, use it as tag weight,
2963 #   - otherwise add a tag with weight 1
2964 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2965 #   the same value multiple times increases tag weight
2966 # * `gitweb.ctag' multi-valued repo config variable
2967 sub git_get_project_ctags {
2968         my $project = shift;
2969         my $ctags = {};
2970
2971         $git_dir = "$projectroot/$project";
2972         if (opendir my $dh, "$git_dir/ctags") {
2973                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2974                 foreach my $tagfile (@files) {
2975                         open my $ct, '<', $tagfile
2976                                 or next;
2977                         my $val = <$ct>;
2978                         chomp $val if $val;
2979                         close $ct;
2980
2981                         (my $ctag = $tagfile) =~ s#.*/##;
2982                         if ($val =~ /^\d+$/) {
2983                                 $ctags->{$ctag} = $val;
2984                         } else {
2985                                 $ctags->{$ctag} = 1;
2986                         }
2987                 }
2988                 closedir $dh;
2989
2990         } elsif (open my $fh, '<', "$git_dir/ctags") {
2991                 while (my $line = <$fh>) {
2992                         chomp $line;
2993                         $ctags->{$line}++ if $line;
2994                 }
2995                 close $fh;
2996
2997         } else {
2998                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2999                 foreach my $tag (@$taglist) {
3000                         $ctags->{$tag}++;
3001                 }
3002         }
3003
3004         return $ctags;
3005 }
3006
3007 # return hash, where keys are content tags ('ctags'),
3008 # and values are sum of weights of given tag in every project
3009 sub git_gather_all_ctags {
3010         my $projects = shift;
3011         my $ctags = {};
3012
3013         foreach my $p (@$projects) {
3014                 foreach my $ct (keys %{$p->{'ctags'}}) {
3015                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
3016                 }
3017         }
3018
3019         return $ctags;
3020 }
3021
3022 sub git_populate_project_tagcloud {
3023         my $ctags = shift;
3024
3025         # First, merge different-cased tags; tags vote on casing
3026         my %ctags_lc;
3027         foreach (keys %$ctags) {
3028                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
3029                 if (not $ctags_lc{lc $_}->{topcount}
3030                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
3031                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
3032                         $ctags_lc{lc $_}->{topname} = $_;
3033                 }
3034         }
3035
3036         my $cloud;
3037         my $matched = $input_params{'ctag'};
3038         if (eval { require HTML::TagCloud; 1; }) {
3039                 $cloud = HTML::TagCloud->new;
3040                 foreach my $ctag (sort keys %ctags_lc) {
3041                         # Pad the title with spaces so that the cloud looks
3042                         # less crammed.
3043                         my $title = esc_html($ctags_lc{$ctag}->{topname});
3044                         $title =~ s/ /&nbsp;/g;
3045                         $title =~ s/^/&nbsp;/g;
3046                         $title =~ s/$/&nbsp;/g;
3047                         if (defined $matched && $matched eq $ctag) {
3048                                 $title = qq(<span class="match">$title</span>);
3049                         }
3050                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
3051                                     $ctags_lc{$ctag}->{count});
3052                 }
3053         } else {
3054                 $cloud = {};
3055                 foreach my $ctag (keys %ctags_lc) {
3056                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3057                         if (defined $matched && $matched eq $ctag) {
3058                                 $title = qq(<span class="match">$title</span>);
3059                         }
3060                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3061                         $cloud->{$ctag}{ctag} =
3062                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
3063                 }
3064         }
3065         return $cloud;
3066 }
3067
3068 sub git_show_project_tagcloud {
3069         my ($cloud, $count) = @_;
3070         if (ref $cloud eq 'HTML::TagCloud') {
3071                 return $cloud->html_and_css($count);
3072         } else {
3073                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3074                 return
3075                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3076                         join (', ', map {
3077                                 $cloud->{$_}->{'ctag'}
3078                         } splice(@tags, 0, $count)) .
3079                         '</div>';
3080         }
3081 }
3082
3083 sub git_get_project_url_list {
3084         my $path = shift;
3085
3086         $git_dir = "$projectroot/$path";
3087         open my $fd, '<', "$git_dir/cloneurl"
3088                 or return wantarray ?
3089                 @{ config_to_multi(git_get_project_config('url')) } :
3090                    config_to_multi(git_get_project_config('url'));
3091         my @git_project_url_list = map { chomp; $_ } <$fd>;
3092         close $fd;
3093
3094         return wantarray ? @git_project_url_list : \@git_project_url_list;
3095 }
3096
3097 sub git_get_projects_list {
3098         my $filter = shift || '';
3099         my $paranoid = shift;
3100         my @list;
3101
3102         if (-d $projects_list) {
3103                 # search in directory
3104                 my $dir = $projects_list;
3105                 # remove the trailing "/"
3106                 $dir =~ s!/+$!!;
3107                 my $pfxlen = length("$dir");
3108                 my $pfxdepth = ($dir =~ tr!/!!);
3109                 # when filtering, search only given subdirectory
3110                 if ($filter && !$paranoid) {
3111                         $dir .= "/$filter";
3112                         $dir =~ s!/+$!!;
3113                 }
3114
3115                 File::Find::find({
3116                         follow_fast => 1, # follow symbolic links
3117                         follow_skip => 2, # ignore duplicates
3118                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3119                         wanted => sub {
3120                                 # global variables
3121                                 our $project_maxdepth;
3122                                 our $projectroot;
3123                                 # skip project-list toplevel, if we get it.
3124                                 return if (m!^[/.]$!);
3125                                 # only directories can be git repositories
3126                                 return unless (-d $_);
3127                                 # need search permission
3128                                 return unless (-x $_);
3129                                 # don't traverse too deep (Find is super slow on os x)
3130                                 # $project_maxdepth excludes depth of $projectroot
3131                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3132                                         $File::Find::prune = 1;
3133                                         return;
3134                                 }
3135
3136                                 my $path = substr($File::Find::name, $pfxlen + 1);
3137                                 # paranoidly only filter here
3138                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3139                                         next;
3140                                 }
3141                                 # we check related file in $projectroot
3142                                 if (check_export_ok("$projectroot/$path")) {
3143                                         push @list, { path => $path };
3144                                         $File::Find::prune = 1;
3145                                 }
3146                         },
3147                 }, "$dir");
3148
3149         } elsif (-f $projects_list) {
3150                 # read from file(url-encoded):
3151                 # 'git%2Fgit.git Linus+Torvalds'
3152                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3153                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3154                 open my $fd, '<', $projects_list or return;
3155         PROJECT:
3156                 while (my $line = <$fd>) {
3157                         chomp $line;
3158                         my ($path, $owner) = split ' ', $line;
3159                         $path = unescape($path);
3160                         $owner = unescape($owner);
3161                         if (!defined $path) {
3162                                 next;
3163                         }
3164                         # if $filter is rpovided, check if $path begins with $filter
3165                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3166                                 next;
3167                         }
3168                         if (check_export_ok("$projectroot/$path")) {
3169                                 my $pr = {
3170                                         path => $path
3171                                 };
3172                                 if ($owner) {
3173                                         $pr->{'owner'} = to_utf8($owner);
3174                                 }
3175                                 push @list, $pr;
3176                         }
3177                 }
3178                 close $fd;
3179         }
3180         return @list;
3181 }
3182
3183 # written with help of Tree::Trie module (Perl Artistic License, GPL compatible)
3184 # as side effects it sets 'forks' field to list of forks for forked projects
3185 sub filter_forks_from_projects_list {
3186         my $projects = shift;
3187
3188         my %trie; # prefix tree of directories (path components)
3189         # generate trie out of those directories that might contain forks
3190         foreach my $pr (@$projects) {
3191                 my $path = $pr->{'path'};
3192                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3193                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3194                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3195                 next unless (-d "$projectroot/$path"); # containing directory exists
3196                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3197
3198                 # add to trie
3199                 my @dirs = split('/', $path);
3200                 # walk the trie, until either runs out of components or out of trie
3201                 my $ref = \%trie;
3202                 while (scalar @dirs &&
3203                        exists($ref->{$dirs[0]})) {
3204                         $ref = $ref->{shift @dirs};
3205                 }
3206                 # create rest of trie structure from rest of components
3207                 foreach my $dir (@dirs) {
3208                         $ref = $ref->{$dir} = {};
3209                 }
3210                 # create end marker, store $pr as a data
3211                 $ref->{''} = $pr if (!exists $ref->{''});
3212         }
3213
3214         # filter out forks, by finding shortest prefix match for paths
3215         my @filtered;
3216  PROJECT:
3217         foreach my $pr (@$projects) {
3218                 # trie lookup
3219                 my $ref = \%trie;
3220         DIR:
3221                 foreach my $dir (split('/', $pr->{'path'})) {
3222                         if (exists $ref->{''}) {
3223                                 # found [shortest] prefix, is a fork - skip it
3224                                 push @{$ref->{''}{'forks'}}, $pr;
3225                                 next PROJECT;
3226                         }
3227                         if (!exists $ref->{$dir}) {
3228                                 # not in trie, cannot have prefix, not a fork
3229                                 push @filtered, $pr;
3230                                 next PROJECT;
3231                         }
3232                         # If the dir is there, we just walk one step down the trie.
3233                         $ref = $ref->{$dir};
3234                 }
3235                 # we ran out of trie
3236                 # (shouldn't happen: it's either no match, or end marker)
3237                 push @filtered, $pr;
3238         }
3239
3240         return @filtered;
3241 }
3242
3243 # note: fill_project_list_info must be run first,
3244 # for 'descr_long' and 'ctags' to be filled
3245 sub search_projects_list {
3246         my ($projlist, %opts) = @_;
3247         my $tagfilter  = $opts{'tagfilter'};
3248         my $search_re = $opts{'search_regexp'};
3249
3250         return @$projlist
3251                 unless ($tagfilter || $search_re);
3252
3253         # searching projects require filling to be run before it;
3254         fill_project_list_info($projlist,
3255                                $tagfilter  ? 'ctags' : (),
3256                                $search_re ? ('path', 'descr') : ());
3257         my @projects;
3258  PROJECT:
3259         foreach my $pr (@$projlist) {
3260
3261                 if ($tagfilter) {
3262                         next unless ref($pr->{'ctags'}) eq 'HASH';
3263                         next unless
3264                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3265                 }
3266
3267                 if ($search_re) {
3268                         next unless
3269                                 $pr->{'path'} =~ /$search_re/ ||
3270                                 $pr->{'descr_long'} =~ /$search_re/;
3271                 }
3272
3273                 push @projects, $pr;
3274         }
3275
3276         return @projects;
3277 }
3278
3279 our $gitweb_project_owner = undef;
3280 sub git_get_project_list_from_file {
3281
3282         return if (defined $gitweb_project_owner);
3283
3284         $gitweb_project_owner = {};
3285         # read from file (url-encoded):
3286         # 'git%2Fgit.git Linus+Torvalds'
3287         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3288         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3289         if (-f $projects_list) {
3290                 open(my $fd, '<', $projects_list);
3291                 while (my $line = <$fd>) {
3292                         chomp $line;
3293                         my ($pr, $ow) = split ' ', $line;
3294                         $pr = unescape($pr);
3295                         $ow = unescape($ow);
3296                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3297                 }
3298                 close $fd;
3299         }
3300 }
3301
3302 sub git_get_project_owner {
3303         my $project = shift;
3304         my $owner;
3305
3306         return undef unless $project;
3307         $git_dir = "$projectroot/$project";
3308
3309         if (!defined $gitweb_project_owner) {
3310                 git_get_project_list_from_file();
3311         }
3312
3313         if (exists $gitweb_project_owner->{$project}) {
3314                 $owner = $gitweb_project_owner->{$project};
3315         }
3316         if (!defined $owner){
3317                 $owner = git_get_project_config('owner');
3318         }
3319         if (!defined $owner) {
3320                 $owner = get_file_owner("$git_dir");
3321         }
3322
3323         return $owner;
3324 }
3325
3326 sub git_get_last_activity {
3327         my ($path) = @_;
3328         my $fd;
3329
3330         $git_dir = "$projectroot/$path";
3331         open($fd, "-|", git_cmd(), 'for-each-ref',
3332              '--format=%(committer)',
3333              '--sort=-committerdate',
3334              '--count=1',
3335              map { "refs/$_" } get_branch_refs ()) or return;
3336         my $most_recent = <$fd>;
3337         close $fd or return;
3338         if (defined $most_recent &&
3339             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3340                 my $timestamp = $1;
3341                 my $age = time - $timestamp;
3342                 return ($age, age_string($age));
3343         }
3344         return (undef, undef);
3345 }
3346
3347 # Implementation note: when a single remote is wanted, we cannot use 'git
3348 # remote show -n' because that command always work (assuming it's a remote URL
3349 # if it's not defined), and we cannot use 'git remote show' because that would
3350 # try to make a network roundtrip. So the only way to find if that particular
3351 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3352 # and when we find what we want.
3353 sub git_get_remotes_list {
3354         my $wanted = shift;
3355         my %remotes = ();
3356
3357         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3358         return unless $fd;
3359         while (my $remote = <$fd>) {
3360                 chomp $remote;
3361                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3362                 next if $wanted and not $remote eq $wanted;
3363                 my ($url, $key) = ($1, $2);
3364
3365                 $remotes{$remote} ||= { 'heads' => () };
3366                 $remotes{$remote}{$key} = $url;
3367         }
3368         close $fd or return;
3369         return wantarray ? %remotes : \%remotes;
3370 }
3371
3372 # Takes a hash of remotes as first parameter and fills it by adding the
3373 # available remote heads for each of the indicated remotes.
3374 sub fill_remote_heads {
3375         my $remotes = shift;
3376         my @heads = map { "remotes/$_" } keys %$remotes;
3377         my @remoteheads = git_get_heads_list(undef, @heads);
3378         foreach my $remote (keys %$remotes) {
3379                 $remotes->{$remote}{'heads'} = [ grep {
3380                         $_->{'name'} =~ s!^$remote/!!
3381                         } @remoteheads ];
3382         }
3383 }
3384
3385 sub git_get_references {
3386         my $type = shift || "";
3387         my %refs;
3388         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3389         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3390         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3391                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3392                 or return;
3393
3394         while (my $line = <$fd>) {
3395                 chomp $line;
3396                 if ($line =~ m!^($oid_regex)\srefs/($type.*)$!) {
3397                         if (defined $refs{$1}) {
3398                                 push @{$refs{$1}}, $2;
3399                         } else {
3400                                 $refs{$1} = [ $2 ];
3401                         }
3402                 }
3403         }
3404         close $fd or return;
3405         return \%refs;
3406 }
3407
3408 sub git_get_rev_name_tags {
3409         my $hash = shift || return undef;
3410
3411         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3412                 or return;
3413         my $name_rev = <$fd>;
3414         close $fd;
3415
3416         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3417                 return $1;
3418         } else {
3419                 # catches also '$hash undefined' output
3420                 return undef;
3421         }
3422 }
3423
3424 ## ----------------------------------------------------------------------
3425 ## parse to hash functions
3426
3427 sub parse_date {
3428         my $epoch = shift;
3429         my $tz = shift || "-0000";
3430
3431         my %date;
3432         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3433         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3434         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3435         $date{'hour'} = $hour;
3436         $date{'minute'} = $min;
3437         $date{'mday'} = $mday;
3438         $date{'day'} = $days[$wday];
3439         $date{'month'} = $months[$mon];
3440         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3441                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3442         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3443                              $mday, $months[$mon], $hour ,$min;
3444         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3445                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3446
3447         my ($tz_sign, $tz_hour, $tz_min) =
3448                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3449         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3450         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3451         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3452         $date{'hour_local'} = $hour;
3453         $date{'minute_local'} = $min;
3454         $date{'tz_local'} = $tz;
3455         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3456                                   1900+$year, $mon+1, $mday,
3457                                   $hour, $min, $sec, $tz);
3458         return %date;
3459 }
3460
3461 sub hide_mailaddrs_if_private {
3462         my $line = shift;
3463         return $line unless gitweb_check_feature('email-privacy');
3464         $line =~ s/<[^@>]+@[^>]+>/<redacted>/g;
3465         return $line;
3466 }
3467
3468 sub parse_tag {
3469         my $tag_id = shift;
3470         my %tag;
3471         my @comment;
3472
3473         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3474         $tag{'id'} = $tag_id;
3475         while (my $line = <$fd>) {
3476                 chomp $line;
3477                 if ($line =~ m/^object ($oid_regex)$/) {
3478                         $tag{'object'} = $1;
3479                 } elsif ($line =~ m/^type (.+)$/) {
3480                         $tag{'type'} = $1;
3481                 } elsif ($line =~ m/^tag (.+)$/) {
3482                         $tag{'name'} = $1;
3483                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3484                         $tag{'author'} = hide_mailaddrs_if_private($1);
3485                         $tag{'author_epoch'} = $2;
3486                         $tag{'author_tz'} = $3;
3487                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3488                                 $tag{'author_name'}  = $1;
3489                                 $tag{'author_email'} = $2;
3490                         } else {
3491                                 $tag{'author_name'} = $tag{'author'};
3492                         }
3493                 } elsif ($line =~ m/--BEGIN/) {
3494                         push @comment, $line;
3495                         last;
3496                 } elsif ($line eq "") {
3497                         last;
3498                 }
3499         }
3500         push @comment, <$fd>;
3501         $tag{'comment'} = \@comment;
3502         close $fd or return;
3503         if (!defined $tag{'name'}) {
3504                 return
3505         };
3506         return %tag
3507 }
3508
3509 sub parse_commit_text {
3510         my ($commit_text, $withparents) = @_;
3511         my @commit_lines = split '\n', $commit_text;
3512         my %co;
3513
3514         pop @commit_lines; # Remove '\0'
3515
3516         if (! @commit_lines) {
3517                 return;
3518         }
3519
3520         my $header = shift @commit_lines;
3521         if ($header !~ m/^$oid_regex/) {
3522                 return;
3523         }
3524         ($co{'id'}, my @parents) = split ' ', $header;
3525         while (my $line = shift @commit_lines) {
3526                 last if $line eq "\n";
3527                 if ($line =~ m/^tree ($oid_regex)$/) {
3528                         $co{'tree'} = $1;
3529                 } elsif ((!defined $withparents) && ($line =~ m/^parent ($oid_regex)$/)) {
3530                         push @parents, $1;
3531                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3532                         $co{'author'} = hide_mailaddrs_if_private(to_utf8($1));
3533                         $co{'author_epoch'} = $2;
3534                         $co{'author_tz'} = $3;
3535                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3536                                 $co{'author_name'}  = $1;
3537                                 $co{'author_email'} = $2;
3538                         } else {
3539                                 $co{'author_name'} = $co{'author'};
3540                         }
3541                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3542                         $co{'committer'} = hide_mailaddrs_if_private(to_utf8($1));
3543                         $co{'committer_epoch'} = $2;
3544                         $co{'committer_tz'} = $3;
3545                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3546                                 $co{'committer_name'}  = $1;
3547                                 $co{'committer_email'} = $2;
3548                         } else {
3549                                 $co{'committer_name'} = $co{'committer'};
3550                         }
3551                 }
3552         }
3553         if (!defined $co{'tree'}) {
3554                 return;
3555         };
3556         $co{'parents'} = \@parents;
3557         $co{'parent'} = $parents[0];
3558
3559         foreach my $title (@commit_lines) {
3560                 $title =~ s/^    //;
3561                 if ($title ne "") {
3562                         $co{'title'} = chop_str($title, 80, 5);
3563                         $co{'title_short'} = chop_str($title, 50, 5);
3564                         last;
3565                 }
3566         }
3567         if (! defined $co{'title'} || $co{'title'} eq "") {
3568                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3569         }
3570         # remove added spaces, redact e-mail addresses if applicable.
3571         foreach my $line (@commit_lines) {
3572                 $line =~ s/^    //;
3573                 $line = hide_mailaddrs_if_private($line);
3574         }
3575         $co{'comment'} = \@commit_lines;
3576
3577         my $age = time - $co{'committer_epoch'};
3578         $co{'age'} = $age;
3579         $co{'age_string'} = age_string($age);
3580         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3581         if ($age > 60*60*24*7*2) {
3582                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3583                 $co{'age_string_age'} = $co{'age_string'};
3584         } else {
3585                 $co{'age_string_date'} = $co{'age_string'};
3586                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3587         }
3588         return %co;
3589 }
3590
3591 sub parse_commit {
3592         my ($commit_id) = @_;
3593         my %co;
3594
3595         local $/ = "\0";
3596
3597         open my $fd, "-|", git_cmd(), "rev-list",
3598                 "--parents",
3599                 "--header",
3600                 "--max-count=1",
3601                 $commit_id,
3602                 "--",
3603                 or die_error(500, "Open git-rev-list failed");
3604         %co = parse_commit_text(<$fd>, 1);
3605         close $fd;
3606
3607         return %co;
3608 }
3609
3610 sub parse_commits {
3611         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3612         my @cos;
3613
3614         $maxcount ||= 1;
3615         $skip ||= 0;
3616
3617         local $/ = "\0";
3618
3619         open my $fd, "-|", git_cmd(), "rev-list",
3620                 "--header",
3621                 @args,
3622                 ("--max-count=" . $maxcount),
3623                 ("--skip=" . $skip),
3624                 @extra_options,
3625                 $commit_id,
3626                 "--",
3627                 ($filename ? ($filename) : ())
3628                 or die_error(500, "Open git-rev-list failed");
3629         while (my $line = <$fd>) {
3630                 my %co = parse_commit_text($line);
3631                 push @cos, \%co;
3632         }
3633         close $fd;
3634
3635         return wantarray ? @cos : \@cos;
3636 }
3637
3638 # parse line of git-diff-tree "raw" output
3639 sub parse_difftree_raw_line {
3640         my $line = shift;
3641         my %res;
3642
3643         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3644         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3645         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ($oid_regex) ($oid_regex) (.)([0-9]{0,3})\t(.*)$/) {
3646                 $res{'from_mode'} = $1;
3647                 $res{'to_mode'} = $2;
3648                 $res{'from_id'} = $3;
3649                 $res{'to_id'} = $4;
3650                 $res{'status'} = $5;
3651                 $res{'similarity'} = $6;
3652                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3653                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3654                 } else {
3655                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3656                 }
3657         }
3658         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3659         # combined diff (for merge commit)
3660         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:$oid_regex )+)([a-zA-Z]+)\t(.*)$//) {
3661                 $res{'nparents'}  = length($1);
3662                 $res{'from_mode'} = [ split(' ', $2) ];
3663                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3664                 $res{'from_id'} = [ split(' ', $3) ];
3665                 $res{'to_id'} = pop @{$res{'from_id'}};
3666                 $res{'status'} = [ split('', $4) ];
3667                 $res{'to_file'} = unquote($5);
3668         }
3669         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3670         elsif ($line =~ m/^($oid_regex)$/) {
3671                 $res{'commit'} = $1;
3672         }
3673
3674         return wantarray ? %res : \%res;
3675 }
3676
3677 # wrapper: return parsed line of git-diff-tree "raw" output
3678 # (the argument might be raw line, or parsed info)
3679 sub parsed_difftree_line {
3680         my $line_or_ref = shift;
3681
3682         if (ref($line_or_ref) eq "HASH") {
3683                 # pre-parsed (or generated by hand)
3684                 return $line_or_ref;
3685         } else {
3686                 return parse_difftree_raw_line($line_or_ref);
3687         }
3688 }
3689
3690 # parse line of git-ls-tree output
3691 sub parse_ls_tree_line {
3692         my $line = shift;
3693         my %opts = @_;
3694         my %res;
3695
3696         if ($opts{'-l'}) {
3697                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3698                 $line =~ m/^([0-9]+) (.+) ($oid_regex) +(-|[0-9]+)\t(.+)$/s;
3699
3700                 $res{'mode'} = $1;
3701                 $res{'type'} = $2;
3702                 $res{'hash'} = $3;
3703                 $res{'size'} = $4;
3704                 if ($opts{'-z'}) {
3705                         $res{'name'} = $5;
3706                 } else {
3707                         $res{'name'} = unquote($5);
3708                 }
3709         } else {
3710                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3711                 $line =~ m/^([0-9]+) (.+) ($oid_regex)\t(.+)$/s;
3712
3713                 $res{'mode'} = $1;
3714                 $res{'type'} = $2;
3715                 $res{'hash'} = $3;
3716                 if ($opts{'-z'}) {
3717                         $res{'name'} = $4;
3718                 } else {
3719                         $res{'name'} = unquote($4);
3720                 }
3721         }
3722
3723         return wantarray ? %res : \%res;
3724 }
3725
3726 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3727 sub parse_from_to_diffinfo {
3728         my ($diffinfo, $from, $to, @parents) = @_;
3729
3730         if ($diffinfo->{'nparents'}) {
3731                 # combined diff
3732                 $from->{'file'} = [];
3733                 $from->{'href'} = [];
3734                 fill_from_file_info($diffinfo, @parents)
3735                         unless exists $diffinfo->{'from_file'};
3736                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3737                         $from->{'file'}[$i] =
3738                                 defined $diffinfo->{'from_file'}[$i] ?
3739                                         $diffinfo->{'from_file'}[$i] :
3740                                         $diffinfo->{'to_file'};
3741                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3742                                 $from->{'href'}[$i] = href(action=>"blob",
3743                                                            hash_base=>$parents[$i],
3744                                                            hash=>$diffinfo->{'from_id'}[$i],
3745                                                            file_name=>$from->{'file'}[$i]);
3746                         } else {
3747                                 $from->{'href'}[$i] = undef;
3748                         }
3749                 }
3750         } else {
3751                 # ordinary (not combined) diff
3752                 $from->{'file'} = $diffinfo->{'from_file'};
3753                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3754                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3755                                                hash=>$diffinfo->{'from_id'},
3756                                                file_name=>$from->{'file'});
3757                 } else {
3758                         delete $from->{'href'};
3759                 }
3760         }
3761
3762         $to->{'file'} = $diffinfo->{'to_file'};
3763         if (!is_deleted($diffinfo)) { # file exists in result
3764                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3765                                      hash=>$diffinfo->{'to_id'},
3766                                      file_name=>$to->{'file'});
3767         } else {
3768                 delete $to->{'href'};
3769         }
3770 }
3771
3772 ## ......................................................................
3773 ## parse to array of hashes functions
3774
3775 sub git_get_heads_list {
3776         my ($limit, @classes) = @_;
3777         @classes = get_branch_refs() unless @classes;
3778         my @patterns = map { "refs/$_" } @classes;
3779         my @headslist;
3780
3781         open my $fd, '-|', git_cmd(), 'for-each-ref',
3782                 ($limit ? '--count='.($limit+1) : ()),
3783                 '--sort=-HEAD', '--sort=-committerdate',
3784                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3785                 @patterns
3786                 or return;
3787         while (my $line = <$fd>) {
3788                 my %ref_item;
3789
3790                 chomp $line;
3791                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3792                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3793                 my ($committer, $epoch, $tz) =
3794                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3795                 $ref_item{'fullname'}  = $name;
3796                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3797                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3798                 $ref_item{'name'} = $name;
3799                 # for refs neither in 'heads' nor 'remotes' we want to
3800                 # show their ref dir
3801                 my $ref_dir = (defined $1) ? $1 : '';
3802                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3803                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3804                 }
3805
3806                 $ref_item{'id'}    = $hash;
3807                 $ref_item{'title'} = $title || '(no commit message)';
3808                 $ref_item{'epoch'} = $epoch;
3809                 if ($epoch) {
3810                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3811                 } else {
3812                         $ref_item{'age'} = "unknown";
3813                 }
3814
3815                 push @headslist, \%ref_item;
3816         }
3817         close $fd;
3818
3819         return wantarray ? @headslist : \@headslist;
3820 }
3821
3822 sub git_get_tags_list {
3823         my $limit = shift;
3824         my @tagslist;
3825
3826         open my $fd, '-|', git_cmd(), 'for-each-ref',
3827                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3828                 '--format=%(objectname) %(objecttype) %(refname) '.
3829                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3830                 'refs/tags'
3831                 or return;
3832         while (my $line = <$fd>) {
3833                 my %ref_item;
3834
3835                 chomp $line;
3836                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3837                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3838                 my ($creator, $epoch, $tz) =
3839                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3840                 $ref_item{'fullname'} = $name;
3841                 $name =~ s!^refs/tags/!!;
3842
3843                 $ref_item{'type'} = $type;
3844                 $ref_item{'id'} = $id;
3845                 $ref_item{'name'} = $name;
3846                 if ($type eq "tag") {
3847                         $ref_item{'subject'} = $title;
3848                         $ref_item{'reftype'} = $reftype;
3849                         $ref_item{'refid'}   = $refid;
3850                 } else {
3851                         $ref_item{'reftype'} = $type;
3852                         $ref_item{'refid'}   = $id;
3853                 }
3854
3855                 if ($type eq "tag" || $type eq "commit") {
3856                         $ref_item{'epoch'} = $epoch;
3857                         if ($epoch) {
3858                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3859                         } else {
3860                                 $ref_item{'age'} = "unknown";
3861                         }
3862                 }
3863
3864                 push @tagslist, \%ref_item;
3865         }
3866         close $fd;
3867
3868         return wantarray ? @tagslist : \@tagslist;
3869 }
3870
3871 ## ----------------------------------------------------------------------
3872 ## filesystem-related functions
3873
3874 sub get_file_owner {
3875         my $path = shift;
3876
3877         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3878         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3879         if (!defined $gcos) {
3880                 return undef;
3881         }
3882         my $owner = $gcos;
3883         $owner =~ s/[,;].*$//;
3884         return to_utf8($owner);
3885 }
3886
3887 # assume that file exists
3888 sub insert_file {
3889         my $filename = shift;
3890
3891         open my $fd, '<', $filename;
3892         print map { to_utf8($_) } <$fd>;
3893         close $fd;
3894 }
3895
3896 ## ......................................................................
3897 ## mimetype related functions
3898
3899 sub mimetype_guess_file {
3900         my $filename = shift;
3901         my $mimemap = shift;
3902         -r $mimemap or return undef;
3903
3904         my %mimemap;
3905         open(my $mh, '<', $mimemap) or return undef;
3906         while (<$mh>) {
3907                 next if m/^#/; # skip comments
3908                 my ($mimetype, @exts) = split(/\s+/);
3909                 foreach my $ext (@exts) {
3910                         $mimemap{$ext} = $mimetype;
3911                 }
3912         }
3913         close($mh);
3914
3915         $filename =~ /\.([^.]*)$/;
3916         return $mimemap{$1};
3917 }
3918
3919 sub mimetype_guess {
3920         my $filename = shift;
3921         my $mime;
3922         $filename =~ /\./ or return undef;
3923
3924         if ($mimetypes_file) {
3925                 my $file = $mimetypes_file;
3926                 if ($file !~ m!^/!) { # if it is relative path
3927                         # it is relative to project
3928                         $file = "$projectroot/$project/$file";
3929                 }
3930                 $mime = mimetype_guess_file($filename, $file);
3931         }
3932         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3933         return $mime;
3934 }
3935
3936 sub blob_mimetype {
3937         my $fd = shift;
3938         my $filename = shift;
3939
3940         if ($filename) {
3941                 my $mime = mimetype_guess($filename);
3942                 $mime and return $mime;
3943         }
3944
3945         # just in case
3946         return $default_blob_plain_mimetype unless $fd;
3947
3948         if (-T $fd) {
3949                 return 'text/plain';
3950         } elsif (! $filename) {
3951                 return 'application/octet-stream';
3952         } elsif ($filename =~ m/\.png$/i) {
3953                 return 'image/png';
3954         } elsif ($filename =~ m/\.gif$/i) {
3955                 return 'image/gif';
3956         } elsif ($filename =~ m/\.jpe?g$/i) {
3957                 return 'image/jpeg';
3958         } else {
3959                 return 'application/octet-stream';
3960         }
3961 }
3962
3963 sub blob_contenttype {
3964         my ($fd, $file_name, $type) = @_;
3965
3966         $type ||= blob_mimetype($fd, $file_name);
3967         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3968                 $type .= "; charset=$default_text_plain_charset";
3969         }
3970
3971         return $type;
3972 }
3973
3974 # guess file syntax for syntax highlighting; return undef if no highlighting
3975 # the name of syntax can (in the future) depend on syntax highlighter used
3976 sub guess_file_syntax {
3977         my ($highlight, $file_name) = @_;
3978         return undef unless ($highlight && defined $file_name);
3979         my $basename = basename($file_name, '.in');
3980         return $highlight_basename{$basename}
3981                 if exists $highlight_basename{$basename};
3982
3983         $basename =~ /\.([^.]*)$/;
3984         my $ext = $1 or return undef;
3985         return $highlight_ext{$ext}
3986                 if exists $highlight_ext{$ext};
3987
3988         return undef;
3989 }
3990
3991 # run highlighter and return FD of its output,
3992 # or return original FD if no highlighting
3993 sub run_highlighter {
3994         my ($fd, $highlight, $syntax) = @_;
3995         return $fd unless ($highlight);
3996
3997         close $fd;
3998         my $syntax_arg = (defined $syntax) ? "--syntax $syntax" : "--force";
3999         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
4000                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
4001                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
4002                     '--', "-fe=$fallback_encoding")." | ".
4003                   quote_command($highlight_bin).
4004                   " --replace-tabs=8 --fragment $syntax_arg |"
4005                 or die_error(500, "Couldn't open file or run syntax highlighter");
4006         return $fd;
4007 }
4008
4009 ## ======================================================================
4010 ## functions printing HTML: header, footer, error page
4011
4012 sub get_page_title {
4013         my $title = to_utf8($site_name);
4014
4015         unless (defined $project) {
4016                 if (defined $project_filter) {
4017                         $title .= " - projects in '" . esc_path($project_filter) . "'";
4018                 }
4019                 return $title;
4020         }
4021         $title .= " - " . to_utf8($project);
4022
4023         return $title unless (defined $action);
4024         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
4025
4026         return $title unless (defined $file_name);
4027         $title .= " - " . esc_path($file_name);
4028         if ($action eq "tree" && $file_name !~ m|/$|) {
4029                 $title .= "/";
4030         }
4031
4032         return $title;
4033 }
4034
4035 sub get_content_type_html {
4036         # require explicit support from the UA if we are to send the page as
4037         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
4038         # we have to do this because MSIE sometimes globs '*/*', pretending to
4039         # support xhtml+xml but choking when it gets what it asked for.
4040         if (defined $cgi->http('HTTP_ACCEPT') &&
4041             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
4042             $cgi->Accept('application/xhtml+xml') != 0) {
4043                 return 'application/xhtml+xml';
4044         } else {
4045                 return 'text/html';
4046         }
4047 }
4048
4049 sub print_feed_meta {
4050         if (defined $project) {
4051                 my %href_params = get_feed_info();
4052                 if (!exists $href_params{'-title'}) {
4053                         $href_params{'-title'} = 'log';
4054                 }
4055
4056                 foreach my $format (qw(RSS Atom)) {
4057                         my $type = lc($format);
4058                         my %link_attr = (
4059                                 '-rel' => 'alternate',
4060                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4061                                 '-type' => "application/$type+xml"
4062                         );
4063
4064                         $href_params{'extra_options'} = undef;
4065                         $href_params{'action'} = $type;
4066                         $link_attr{'-href'} = esc_attr(href(%href_params));
4067                         print "<link ".
4068                               "rel=\"$link_attr{'-rel'}\" ".
4069                               "title=\"$link_attr{'-title'}\" ".
4070                               "href=\"$link_attr{'-href'}\" ".
4071                               "type=\"$link_attr{'-type'}\" ".
4072                               "/>\n";
4073
4074                         $href_params{'extra_options'} = '--no-merges';
4075                         $link_attr{'-href'} = esc_attr(href(%href_params));
4076                         $link_attr{'-title'} .= ' (no merges)';
4077                         print "<link ".
4078                               "rel=\"$link_attr{'-rel'}\" ".
4079                               "title=\"$link_attr{'-title'}\" ".
4080                               "href=\"$link_attr{'-href'}\" ".
4081                               "type=\"$link_attr{'-type'}\" ".
4082                               "/>\n";
4083                 }
4084
4085         } else {
4086                 printf('<link rel="alternate" title="%s projects list" '.
4087                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4088                        esc_attr($site_name),
4089                        esc_attr(href(project=>undef, action=>"project_index")));
4090                 printf('<link rel="alternate" title="%s projects feeds" '.
4091                        'href="%s" type="text/x-opml" />'."\n",
4092                        esc_attr($site_name),
4093                        esc_attr(href(project=>undef, action=>"opml")));
4094         }
4095 }
4096
4097 sub print_header_links {
4098         my $status = shift;
4099
4100         # print out each stylesheet that exist, providing backwards capability
4101         # for those people who defined $stylesheet in a config file
4102         if (defined $stylesheet) {
4103                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4104         } else {
4105                 foreach my $stylesheet (@stylesheets) {
4106                         next unless $stylesheet;
4107                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4108                 }
4109         }
4110         print_feed_meta()
4111                 if ($status eq '200 OK');
4112         if (defined $favicon) {
4113                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4114         }
4115 }
4116
4117 sub print_nav_breadcrumbs_path {
4118         my $dirprefix = undef;
4119         while (my $part = shift) {
4120                 $dirprefix .= "/" if defined $dirprefix;
4121                 $dirprefix .= $part;
4122                 print $cgi->a({-href => href(project => undef,
4123                                              project_filter => $dirprefix,
4124                                              action => "project_list")},
4125                               esc_html($part)) . " / ";
4126         }
4127 }
4128
4129 sub print_nav_breadcrumbs {
4130         my %opts = @_;
4131
4132         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4133                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4134         }
4135         if (defined $project) {
4136                 my @dirname = split '/', $project;
4137                 my $projectbasename = pop @dirname;
4138                 print_nav_breadcrumbs_path(@dirname);
4139                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4140                 if (defined $action) {
4141                         my $action_print = $action ;
4142                         if (defined $opts{-action_extra}) {
4143                                 $action_print = $cgi->a({-href => href(action=>$action)},
4144                                         $action);
4145                         }
4146                         print " / $action_print";
4147                 }
4148                 if (defined $opts{-action_extra}) {
4149                         print " / $opts{-action_extra}";
4150                 }
4151                 print "\n";
4152         } elsif (defined $project_filter) {
4153                 print_nav_breadcrumbs_path(split '/', $project_filter);
4154         }
4155 }
4156
4157 sub print_search_form {
4158         if (!defined $searchtext) {
4159                 $searchtext = "";
4160         }
4161         my $search_hash;
4162         if (defined $hash_base) {
4163                 $search_hash = $hash_base;
4164         } elsif (defined $hash) {
4165                 $search_hash = $hash;
4166         } else {
4167                 $search_hash = "HEAD";
4168         }
4169         my $action = $my_uri;
4170         my $use_pathinfo = gitweb_check_feature('pathinfo');
4171         if ($use_pathinfo) {
4172                 $action .= "/".esc_url($project);
4173         }
4174         print $cgi->start_form(-method => "get", -action => $action) .
4175               "<div class=\"search\">\n" .
4176               (!$use_pathinfo &&
4177               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4178               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4179               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4180               $cgi->popup_menu(-name => 'st', -default => 'commit',
4181                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4182               " " . $cgi->a({-href => href(action=>"search_help"),
4183                              -title => "search help" }, "?") . " search:\n",
4184               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4185               "<span title=\"Extended regular expression\">" .
4186               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4187                              -checked => $search_use_regexp) .
4188               "</span>" .
4189               "</div>" .
4190               $cgi->end_form() . "\n";
4191 }
4192
4193 sub git_header_html {
4194         my $status = shift || "200 OK";
4195         my $expires = shift;
4196         my %opts = @_;
4197
4198         my $title = get_page_title();
4199         print $cgi->header(-type=>get_content_type_html(), -charset => 'utf-8',
4200                            -status=> $status, -expires => $expires)
4201                 unless ($opts{'-no_http_header'});
4202         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4203         print <<EOF;
4204 <?xml version="1.0" encoding="utf-8"?>
4205 <!DOCTYPE html [
4206         <!ENTITY nbsp "&#xA0;">
4207         <!ENTITY sdot "&#x22C5;">
4208 ]>
4209 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4210 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4211 <!-- git core binaries version $git_version -->
4212 <head>
4213 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4214 <meta name="robots" content="index, nofollow"/>
4215 <title>$title</title>
4216 EOF
4217         # the stylesheet, favicon etc urls won't work correctly with path_info
4218         # unless we set the appropriate base URL
4219         if ($ENV{'PATH_INFO'}) {
4220                 print "<base href=\"".esc_url($base_url)."\" />\n";
4221         }
4222         print_header_links($status);
4223
4224         if (defined $site_html_head_string) {
4225                 print to_utf8($site_html_head_string);
4226         }
4227
4228         print "</head>\n" .
4229               "<body>\n";
4230
4231         if (defined $site_header && -f $site_header) {
4232                 insert_file($site_header);
4233         }
4234
4235         print "<div class=\"page_header\">\n";
4236         if (defined $logo) {
4237                 print $cgi->a({-href => esc_url($logo_url),
4238                                -title => $logo_label},
4239                               $cgi->img({-src => esc_url($logo),
4240                                          -width => 72, -height => 27,
4241                                          -alt => "git",
4242                                          -class => "logo"}));
4243         }
4244         print_nav_breadcrumbs(%opts);
4245         print "</div>\n";
4246
4247         my $have_search = gitweb_check_feature('search');
4248         if (defined $project && $have_search) {
4249                 print_search_form();
4250         }
4251 }
4252
4253 sub git_footer_html {
4254         my $feed_class = 'rss_logo';
4255
4256         print "<div class=\"page_footer\">\n";
4257         if (defined $project) {
4258                 my $descr = git_get_project_description($project);
4259                 if (defined $descr) {
4260                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4261                 }
4262
4263                 my %href_params = get_feed_info();
4264                 if (!%href_params) {
4265                         $feed_class .= ' generic';
4266                 }
4267                 $href_params{'-title'} ||= 'log';
4268
4269                 foreach my $format (qw(RSS Atom)) {
4270                         $href_params{'action'} = lc($format);
4271                         print $cgi->a({-href => href(%href_params),
4272                                       -title => "$href_params{'-title'} $format feed",
4273                                       -class => $feed_class}, $format)."\n";
4274                 }
4275
4276         } else {
4277                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4278                                              project_filter => $project_filter),
4279                               -class => $feed_class}, "OPML") . " ";
4280                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4281                                              project_filter => $project_filter),
4282                               -class => $feed_class}, "TXT") . "\n";
4283         }
4284         print "</div>\n"; # class="page_footer"
4285
4286         if (defined $t0 && gitweb_check_feature('timed')) {
4287                 print "<div id=\"generating_info\">\n";
4288                 print 'This page took '.
4289                       '<span id="generating_time" class="time_span">'.
4290                       tv_interval($t0, [ gettimeofday() ]).
4291                       ' seconds </span>'.
4292                       ' and '.
4293                       '<span id="generating_cmd">'.
4294                       $number_of_git_cmds.
4295                       '</span> git commands '.
4296                       " to generate.\n";
4297                 print "</div>\n"; # class="page_footer"
4298         }
4299
4300         if (defined $site_footer && -f $site_footer) {
4301                 insert_file($site_footer);
4302         }
4303
4304         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4305         if (defined $action &&
4306             $action eq 'blame_incremental') {
4307                 print qq!<script type="text/javascript">\n!.
4308                       qq!startBlame("!. esc_attr(href(action=>"blame_data", -replay=>1)) .qq!",\n!.
4309                       qq!           "!. esc_attr(href()) .qq!");\n!.
4310                       qq!</script>\n!;
4311         } else {
4312                 my ($jstimezone, $tz_cookie, $datetime_class) =
4313                         gitweb_get_feature('javascript-timezone');
4314
4315                 print qq!<script type="text/javascript">\n!.
4316                       qq!window.onload = function () {\n!;
4317                 if (gitweb_check_feature('javascript-actions')) {
4318                         print qq!       fixLinks();\n!;
4319                 }
4320                 if ($jstimezone && $tz_cookie && $datetime_class) {
4321                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4322                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4323                 }
4324                 print qq!};\n!.
4325                       qq!</script>\n!;
4326         }
4327
4328         print "</body>\n" .
4329               "</html>";
4330 }
4331
4332 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4333 # Example: die_error(404, 'Hash not found')
4334 # By convention, use the following status codes (as defined in RFC 2616):
4335 # 400: Invalid or missing CGI parameters, or
4336 #      requested object exists but has wrong type.
4337 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4338 #      this server or project.
4339 # 404: Requested object/revision/project doesn't exist.
4340 # 500: The server isn't configured properly, or
4341 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4342 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4343 # 503: The server is currently unavailable (because it is overloaded,
4344 #      or down for maintenance).  Generally, this is a temporary state.
4345 sub die_error {
4346         my $status = shift || 500;
4347         my $error = esc_html(shift) || "Internal Server Error";
4348         my $extra = shift;
4349         my %opts = @_;
4350
4351         my %http_responses = (
4352                 400 => '400 Bad Request',
4353                 403 => '403 Forbidden',
4354                 404 => '404 Not Found',
4355                 500 => '500 Internal Server Error',
4356                 503 => '503 Service Unavailable',
4357         );
4358         git_header_html($http_responses{$status}, undef, %opts);
4359         print <<EOF;
4360 <div class="page_body">
4361 <br /><br />
4362 $status - $error
4363 <br />
4364 EOF
4365         if (defined $extra) {
4366                 print "<hr />\n" .
4367                       "$extra\n";
4368         }
4369         print "</div>\n";
4370
4371         git_footer_html();
4372         goto DONE_GITWEB
4373                 unless ($opts{'-error_handler'});
4374 }
4375
4376 ## ----------------------------------------------------------------------
4377 ## functions printing or outputting HTML: navigation
4378
4379 sub git_print_page_nav {
4380         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4381         $extra = '' if !defined $extra; # pager or formats
4382
4383         my @navs = qw(summary shortlog log commit commitdiff tree);
4384         if ($suppress) {
4385                 @navs = grep { $_ ne $suppress } @navs;
4386         }
4387
4388         my %arg = map { $_ => {action=>$_} } @navs;
4389         if (defined $head) {
4390                 for (qw(commit commitdiff)) {
4391                         $arg{$_}{'hash'} = $head;
4392                 }
4393                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4394                         for (qw(shortlog log)) {
4395                                 $arg{$_}{'hash'} = $head;
4396                         }
4397                 }
4398         }
4399
4400         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4401         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4402
4403         my @actions = gitweb_get_feature('actions');
4404         my %repl = (
4405                 '%' => '%',
4406                 'n' => $project,         # project name
4407                 'f' => $git_dir,         # project path within filesystem
4408                 'h' => $treehead || '',  # current hash ('h' parameter)
4409                 'b' => $treebase || '',  # hash base ('hb' parameter)
4410         );
4411         while (@actions) {
4412                 my ($label, $link, $pos) = splice(@actions,0,3);
4413                 # insert
4414                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4415                 # munch munch
4416                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4417                 $arg{$label}{'_href'} = $link;
4418         }
4419
4420         print "<div class=\"page_nav\">\n" .
4421                 (join " | ",
4422                  map { $_ eq $current ?
4423                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4424                  } @navs);
4425         print "<br/>\n$extra<br/>\n" .
4426               "</div>\n";
4427 }
4428
4429 # returns a submenu for the navigation of the refs views (tags, heads,
4430 # remotes) with the current view disabled and the remotes view only
4431 # available if the feature is enabled
4432 sub format_ref_views {
4433         my ($current) = @_;
4434         my @ref_views = qw{tags heads};
4435         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4436         return join " | ", map {
4437                 $_ eq $current ? $_ :
4438                 $cgi->a({-href => href(action=>$_)}, $_)
4439         } @ref_views
4440 }
4441
4442 sub format_paging_nav {
4443         my ($action, $page, $has_next_link) = @_;
4444         my $paging_nav;
4445
4446
4447         if ($page > 0) {
4448                 $paging_nav .=
4449                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4450                         " &sdot; " .
4451                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4452                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4453         } else {
4454                 $paging_nav .= "first &sdot; prev";
4455         }
4456
4457         if ($has_next_link) {
4458                 $paging_nav .= " &sdot; " .
4459                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4460                                  -accesskey => "n", -title => "Alt-n"}, "next");
4461         } else {
4462                 $paging_nav .= " &sdot; next";
4463         }
4464
4465         return $paging_nav;
4466 }
4467
4468 ## ......................................................................
4469 ## functions printing or outputting HTML: div
4470
4471 sub git_print_header_div {
4472         my ($action, $title, $hash, $hash_base) = @_;
4473         my %args = ();
4474
4475         $args{'action'} = $action;
4476         $args{'hash'} = $hash if $hash;
4477         $args{'hash_base'} = $hash_base if $hash_base;
4478
4479         print "<div class=\"header\">\n" .
4480               $cgi->a({-href => href(%args), -class => "title"},
4481               $title ? $title : $action) .
4482               "\n</div>\n";
4483 }
4484
4485 sub format_repo_url {
4486         my ($name, $url) = @_;
4487         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4488 }
4489
4490 # Group output by placing it in a DIV element and adding a header.
4491 # Options for start_div() can be provided by passing a hash reference as the
4492 # first parameter to the function.
4493 # Options to git_print_header_div() can be provided by passing an array
4494 # reference. This must follow the options to start_div if they are present.
4495 # The content can be a scalar, which is output as-is, a scalar reference, which
4496 # is output after html escaping, an IO handle passed either as *handle or
4497 # *handle{IO}, or a function reference. In the latter case all following
4498 # parameters will be taken as argument to the content function call.
4499 sub git_print_section {
4500         my ($div_args, $header_args, $content);
4501         my $arg = shift;
4502         if (ref($arg) eq 'HASH') {
4503                 $div_args = $arg;
4504                 $arg = shift;
4505         }
4506         if (ref($arg) eq 'ARRAY') {
4507                 $header_args = $arg;
4508                 $arg = shift;
4509         }
4510         $content = $arg;
4511
4512         print $cgi->start_div($div_args);
4513         git_print_header_div(@$header_args);
4514
4515         if (ref($content) eq 'CODE') {
4516                 $content->(@_);
4517         } elsif (ref($content) eq 'SCALAR') {
4518                 print esc_html($$content);
4519         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4520                 print <$content>;
4521         } elsif (!ref($content) && defined($content)) {
4522                 print $content;
4523         }
4524
4525         print $cgi->end_div;
4526 }
4527
4528 sub format_timestamp_html {
4529         my $date = shift;
4530         my $strtime = $date->{'rfc2822'};
4531
4532         my (undef, undef, $datetime_class) =
4533                 gitweb_get_feature('javascript-timezone');
4534         if ($datetime_class) {
4535                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4536         }
4537
4538         my $localtime_format = '(%02d:%02d %s)';
4539         if ($date->{'hour_local'} < 6) {
4540                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4541         }
4542         $strtime .= ' ' .
4543                     sprintf($localtime_format,
4544                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4545
4546         return $strtime;
4547 }
4548
4549 # Outputs the author name and date in long form
4550 sub git_print_authorship {
4551         my $co = shift;
4552         my %opts = @_;
4553         my $tag = $opts{-tag} || 'div';
4554         my $author = $co->{'author_name'};
4555
4556         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4557         print "<$tag class=\"author_date\">" .
4558               format_search_author($author, "author", esc_html($author)) .
4559               " [".format_timestamp_html(\%ad)."]".
4560               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4561               "</$tag>\n";
4562 }
4563
4564 # Outputs table rows containing the full author or committer information,
4565 # in the format expected for 'commit' view (& similar).
4566 # Parameters are a commit hash reference, followed by the list of people
4567 # to output information for. If the list is empty it defaults to both
4568 # author and committer.
4569 sub git_print_authorship_rows {
4570         my $co = shift;
4571         # too bad we can't use @people = @_ || ('author', 'committer')
4572         my @people = @_;
4573         @people = ('author', 'committer') unless @people;
4574         foreach my $who (@people) {
4575                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4576                 print "<tr><td>$who</td><td>" .
4577                       format_search_author($co->{"${who}_name"}, $who,
4578                                            esc_html($co->{"${who}_name"})) . " " .
4579                       format_search_author($co->{"${who}_email"}, $who,
4580                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4581                       "</td><td rowspan=\"2\">" .
4582                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4583                       "</td></tr>\n" .
4584                       "<tr>" .
4585                       "<td></td><td>" .
4586                       format_timestamp_html(\%wd) .
4587                       "</td>" .
4588                       "</tr>\n";
4589         }
4590 }
4591
4592 sub git_print_page_path {
4593         my $name = shift;
4594         my $type = shift;
4595         my $hb = shift;
4596
4597
4598         print "<div class=\"page_path\">";
4599         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4600                       -title => 'tree root'}, to_utf8("[$project]"));
4601         print " / ";
4602         if (defined $name) {
4603                 my @dirname = split '/', $name;
4604                 my $basename = pop @dirname;
4605                 my $fullname = '';
4606
4607                 foreach my $dir (@dirname) {
4608                         $fullname .= ($fullname ? '/' : '') . $dir;
4609                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4610                                                      hash_base=>$hb),
4611                                       -title => $fullname}, esc_path($dir));
4612                         print " / ";
4613                 }
4614                 if (defined $type && $type eq 'blob') {
4615                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4616                                                      hash_base=>$hb),
4617                                       -title => $name}, esc_path($basename));
4618                 } elsif (defined $type && $type eq 'tree') {
4619                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4620                                                      hash_base=>$hb),
4621                                       -title => $name}, esc_path($basename));
4622                         print " / ";
4623                 } else {
4624                         print esc_path($basename);
4625                 }
4626         }
4627         print "<br/></div>\n";
4628 }
4629
4630 sub git_print_log {
4631         my $log = shift;
4632         my %opts = @_;
4633
4634         if ($opts{'-remove_title'}) {
4635                 # remove title, i.e. first line of log
4636                 shift @$log;
4637         }
4638         # remove leading empty lines
4639         while (defined $log->[0] && $log->[0] eq "") {
4640                 shift @$log;
4641         }
4642
4643         # print log
4644         my $skip_blank_line = 0;
4645         foreach my $line (@$log) {
4646                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-([Bb]y|[Tt]o)|C[Cc]|(Clos|Fix)es): /) {
4647                         if (! $opts{'-remove_signoff'}) {
4648                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4649                                 $skip_blank_line = 1;
4650                         }
4651                         next;
4652                 }
4653
4654                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4655                         if (! $opts{'-remove_signoff'}) {
4656                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4657                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4658                                         "</span><br/>\n";
4659                                 $skip_blank_line = 1;
4660                         }
4661                         next;
4662                 }
4663
4664                 # print only one empty line
4665                 # do not print empty line after signoff
4666                 if ($line eq "") {
4667                         next if ($skip_blank_line);
4668                         $skip_blank_line = 1;
4669                 } else {
4670                         $skip_blank_line = 0;
4671                 }
4672
4673                 print format_log_line_html($line) . "<br/>\n";
4674         }
4675
4676         if ($opts{'-final_empty_line'}) {
4677                 # end with single empty line
4678                 print "<br/>\n" unless $skip_blank_line;
4679         }
4680 }
4681
4682 # return link target (what link points to)
4683 sub git_get_link_target {
4684         my $hash = shift;
4685         my $link_target;
4686
4687         # read link
4688         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4689                 or return;
4690         {
4691                 local $/ = undef;
4692                 $link_target = <$fd>;
4693         }
4694         close $fd
4695                 or return;
4696
4697         return $link_target;
4698 }
4699
4700 # given link target, and the directory (basedir) the link is in,
4701 # return target of link relative to top directory (top tree);
4702 # return undef if it is not possible (including absolute links).
4703 sub normalize_link_target {
4704         my ($link_target, $basedir) = @_;
4705
4706         # absolute symlinks (beginning with '/') cannot be normalized
4707         return if (substr($link_target, 0, 1) eq '/');
4708
4709         # normalize link target to path from top (root) tree (dir)
4710         my $path;
4711         if ($basedir) {
4712                 $path = $basedir . '/' . $link_target;
4713         } else {
4714                 # we are in top (root) tree (dir)
4715                 $path = $link_target;
4716         }
4717
4718         # remove //, /./, and /../
4719         my @path_parts;
4720         foreach my $part (split('/', $path)) {
4721                 # discard '.' and ''
4722                 next if (!$part || $part eq '.');
4723                 # handle '..'
4724                 if ($part eq '..') {
4725                         if (@path_parts) {
4726                                 pop @path_parts;
4727                         } else {
4728                                 # link leads outside repository (outside top dir)
4729                                 return;
4730                         }
4731                 } else {
4732                         push @path_parts, $part;
4733                 }
4734         }
4735         $path = join('/', @path_parts);
4736
4737         return $path;
4738 }
4739
4740 # print tree entry (row of git_tree), but without encompassing <tr> element
4741 sub git_print_tree_entry {
4742         my ($t, $basedir, $hash_base, $have_blame) = @_;
4743
4744         my %base_key = ();
4745         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4746
4747         # The format of a table row is: mode list link.  Where mode is
4748         # the mode of the entry, list is the name of the entry, an href,
4749         # and link is the action links of the entry.
4750
4751         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4752         if (exists $t->{'size'}) {
4753                 print "<td class=\"size\">$t->{'size'}</td>\n";
4754         }
4755         if ($t->{'type'} eq "blob") {
4756                 print "<td class=\"list\">" .
4757                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4758                                                file_name=>"$basedir$t->{'name'}", %base_key),
4759                                 -class => "list"}, esc_path($t->{'name'}));
4760                 if (S_ISLNK(oct $t->{'mode'})) {
4761                         my $link_target = git_get_link_target($t->{'hash'});
4762                         if ($link_target) {
4763                                 my $norm_target = normalize_link_target($link_target, $basedir);
4764                                 if (defined $norm_target) {
4765                                         print " -> " .
4766                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4767                                                                      file_name=>$norm_target),
4768                                                        -title => $norm_target}, esc_path($link_target));
4769                                 } else {
4770                                         print " -> " . esc_path($link_target);
4771                                 }
4772                         }
4773                 }
4774                 print "</td>\n";
4775                 print "<td class=\"link\">";
4776                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4777                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4778                               "blob");
4779                 if ($have_blame) {
4780                         print " | " .
4781                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4782                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4783                                       "blame");
4784                 }
4785                 if (defined $hash_base) {
4786                         print " | " .
4787                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4788                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4789                                       "history");
4790                 }
4791                 print " | " .
4792                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4793                                                file_name=>"$basedir$t->{'name'}")},
4794                                 "raw");
4795                 print "</td>\n";
4796
4797         } elsif ($t->{'type'} eq "tree") {
4798                 print "<td class=\"list\">";
4799                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4800                                              file_name=>"$basedir$t->{'name'}",
4801                                              %base_key)},
4802                               esc_path($t->{'name'}));
4803                 print "</td>\n";
4804                 print "<td class=\"link\">";
4805                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4806                                              file_name=>"$basedir$t->{'name'}",
4807                                              %base_key)},
4808                               "tree");
4809                 if (defined $hash_base) {
4810                         print " | " .
4811                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4812                                                      file_name=>"$basedir$t->{'name'}")},
4813                                       "history");
4814                 }
4815                 print "</td>\n";
4816         } else {
4817                 # unknown object: we can only present history for it
4818                 # (this includes 'commit' object, i.e. submodule support)
4819                 print "<td class=\"list\">" .
4820                       esc_path($t->{'name'}) .
4821                       "</td>\n";
4822                 print "<td class=\"link\">";
4823                 if (defined $hash_base) {
4824                         print $cgi->a({-href => href(action=>"history",
4825                                                      hash_base=>$hash_base,
4826                                                      file_name=>"$basedir$t->{'name'}")},
4827                                       "history");
4828                 }
4829                 print "</td>\n";
4830         }
4831 }
4832
4833 ## ......................................................................
4834 ## functions printing large fragments of HTML
4835
4836 # get pre-image filenames for merge (combined) diff
4837 sub fill_from_file_info {
4838         my ($diff, @parents) = @_;
4839
4840         $diff->{'from_file'} = [ ];
4841         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4842         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4843                 if ($diff->{'status'}[$i] eq 'R' ||
4844                     $diff->{'status'}[$i] eq 'C') {
4845                         $diff->{'from_file'}[$i] =
4846                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4847                 }
4848         }
4849
4850         return $diff;
4851 }
4852
4853 # is current raw difftree line of file deletion
4854 sub is_deleted {
4855         my $diffinfo = shift;
4856
4857         return $diffinfo->{'to_id'} eq ('0' x 40) || $diffinfo->{'to_id'} eq ('0' x 64);
4858 }
4859
4860 # does patch correspond to [previous] difftree raw line
4861 # $diffinfo  - hashref of parsed raw diff format
4862 # $patchinfo - hashref of parsed patch diff format
4863 #              (the same keys as in $diffinfo)
4864 sub is_patch_split {
4865         my ($diffinfo, $patchinfo) = @_;
4866
4867         return defined $diffinfo && defined $patchinfo
4868                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4869 }
4870
4871
4872 sub git_difftree_body {
4873         my ($difftree, $hash, @parents) = @_;
4874         my ($parent) = $parents[0];
4875         my $have_blame = gitweb_check_feature('blame');
4876         print "<div class=\"list_head\">\n";
4877         if ($#{$difftree} > 10) {
4878                 print(($#{$difftree} + 1) . " files changed:\n");
4879         }
4880         print "</div>\n";
4881
4882         print "<table class=\"" .
4883               (@parents > 1 ? "combined " : "") .
4884               "diff_tree\">\n";
4885
4886         # header only for combined diff in 'commitdiff' view
4887         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4888         if ($has_header) {
4889                 # table header
4890                 print "<thead><tr>\n" .
4891                        "<th></th><th></th>\n"; # filename, patchN link
4892                 for (my $i = 0; $i < @parents; $i++) {
4893                         my $par = $parents[$i];
4894                         print "<th>" .
4895                               $cgi->a({-href => href(action=>"commitdiff",
4896                                                      hash=>$hash, hash_parent=>$par),
4897                                        -title => 'commitdiff to parent number ' .
4898                                                   ($i+1) . ': ' . substr($par,0,7)},
4899                                       $i+1) .
4900                               "&nbsp;</th>\n";
4901                 }
4902                 print "</tr></thead>\n<tbody>\n";
4903         }
4904
4905         my $alternate = 1;
4906         my $patchno = 0;
4907         foreach my $line (@{$difftree}) {
4908                 my $diff = parsed_difftree_line($line);
4909
4910                 if ($alternate) {
4911                         print "<tr class=\"dark\">\n";
4912                 } else {
4913                         print "<tr class=\"light\">\n";
4914                 }
4915                 $alternate ^= 1;
4916
4917                 if (exists $diff->{'nparents'}) { # combined diff
4918
4919                         fill_from_file_info($diff, @parents)
4920                                 unless exists $diff->{'from_file'};
4921
4922                         if (!is_deleted($diff)) {
4923                                 # file exists in the result (child) commit
4924                                 print "<td>" .
4925                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4926                                                              file_name=>$diff->{'to_file'},
4927                                                              hash_base=>$hash),
4928                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4929                                       "</td>\n";
4930                         } else {
4931                                 print "<td>" .
4932                                       esc_path($diff->{'to_file'}) .
4933                                       "</td>\n";
4934                         }
4935
4936                         if ($action eq 'commitdiff') {
4937                                 # link to patch
4938                                 $patchno++;
4939                                 print "<td class=\"link\">" .
4940                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4941                                               "patch") .
4942                                       " | " .
4943                                       "</td>\n";
4944                         }
4945
4946                         my $has_history = 0;
4947                         my $not_deleted = 0;
4948                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4949                                 my $hash_parent = $parents[$i];
4950                                 my $from_hash = $diff->{'from_id'}[$i];
4951                                 my $from_path = $diff->{'from_file'}[$i];
4952                                 my $status = $diff->{'status'}[$i];
4953
4954                                 $has_history ||= ($status ne 'A');
4955                                 $not_deleted ||= ($status ne 'D');
4956
4957                                 if ($status eq 'A') {
4958                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4959                                 } elsif ($status eq 'D') {
4960                                         print "<td class=\"link\">" .
4961                                               $cgi->a({-href => href(action=>"blob",
4962                                                                      hash_base=>$hash,
4963                                                                      hash=>$from_hash,
4964                                                                      file_name=>$from_path)},
4965                                                       "blob" . ($i+1)) .
4966                                               " | </td>\n";
4967                                 } else {
4968                                         if ($diff->{'to_id'} eq $from_hash) {
4969                                                 print "<td class=\"link nochange\">";
4970                                         } else {
4971                                                 print "<td class=\"link\">";
4972                                         }
4973                                         print $cgi->a({-href => href(action=>"blobdiff",
4974                                                                      hash=>$diff->{'to_id'},
4975                                                                      hash_parent=>$from_hash,
4976                                                                      hash_base=>$hash,
4977                                                                      hash_parent_base=>$hash_parent,
4978                                                                      file_name=>$diff->{'to_file'},
4979                                                                      file_parent=>$from_path)},
4980                                                       "diff" . ($i+1)) .
4981                                               " | </td>\n";
4982                                 }
4983                         }
4984
4985                         print "<td class=\"link\">";
4986                         if ($not_deleted) {
4987                                 print $cgi->a({-href => href(action=>"blob",
4988                                                              hash=>$diff->{'to_id'},
4989                                                              file_name=>$diff->{'to_file'},
4990                                                              hash_base=>$hash)},
4991                                               "blob");
4992                                 print " | " if ($has_history);
4993                         }
4994                         if ($has_history) {
4995                                 print $cgi->a({-href => href(action=>"history",
4996                                                              file_name=>$diff->{'to_file'},
4997                                                              hash_base=>$hash)},
4998                                               "history");
4999                         }
5000                         print "</td>\n";
5001
5002                         print "</tr>\n";
5003                         next; # instead of 'else' clause, to avoid extra indent
5004                 }
5005                 # else ordinary diff
5006
5007                 my ($to_mode_oct, $to_mode_str, $to_file_type);
5008                 my ($from_mode_oct, $from_mode_str, $from_file_type);
5009                 if ($diff->{'to_mode'} ne ('0' x 6)) {
5010                         $to_mode_oct = oct $diff->{'to_mode'};
5011                         if (S_ISREG($to_mode_oct)) { # only for regular file
5012                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
5013                         }
5014                         $to_file_type = file_type($diff->{'to_mode'});
5015                 }
5016                 if ($diff->{'from_mode'} ne ('0' x 6)) {
5017                         $from_mode_oct = oct $diff->{'from_mode'};
5018                         if (S_ISREG($from_mode_oct)) { # only for regular file
5019                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
5020                         }
5021                         $from_file_type = file_type($diff->{'from_mode'});
5022                 }
5023
5024                 if ($diff->{'status'} eq "A") { # created
5025                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
5026                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
5027                         $mode_chng   .= "]</span>";
5028                         print "<td>";
5029                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5030                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5031                                       -class => "list"}, esc_path($diff->{'file'}));
5032                         print "</td>\n";
5033                         print "<td>$mode_chng</td>\n";
5034                         print "<td class=\"link\">";
5035                         if ($action eq 'commitdiff') {
5036                                 # link to patch
5037                                 $patchno++;
5038                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5039                                               "patch") .
5040                                       " | ";
5041                         }
5042                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5043                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5044                                       "blob");
5045                         print "</td>\n";
5046
5047                 } elsif ($diff->{'status'} eq "D") { # deleted
5048                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5049                         print "<td>";
5050                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5051                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5052                                        -class => "list"}, esc_path($diff->{'file'}));
5053                         print "</td>\n";
5054                         print "<td>$mode_chng</td>\n";
5055                         print "<td class=\"link\">";
5056                         if ($action eq 'commitdiff') {
5057                                 # link to patch
5058                                 $patchno++;
5059                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5060                                               "patch") .
5061                                       " | ";
5062                         }
5063                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5064                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5065                                       "blob") . " | ";
5066                         if ($have_blame) {
5067                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5068                                                              file_name=>$diff->{'file'})},
5069                                               "blame") . " | ";
5070                         }
5071                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5072                                                      file_name=>$diff->{'file'})},
5073                                       "history");
5074                         print "</td>\n";
5075
5076                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5077                         my $mode_chnge = "";
5078                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5079                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5080                                 if ($from_file_type ne $to_file_type) {
5081                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5082                                 }
5083                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5084                                         if ($from_mode_str && $to_mode_str) {
5085                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5086                                         } elsif ($to_mode_str) {
5087                                                 $mode_chnge .= " mode: $to_mode_str";
5088                                         }
5089                                 }
5090                                 $mode_chnge .= "]</span>\n";
5091                         }
5092                         print "<td>";
5093                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5094                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5095                                       -class => "list"}, esc_path($diff->{'file'}));
5096                         print "</td>\n";
5097                         print "<td>$mode_chnge</td>\n";
5098                         print "<td class=\"link\">";
5099                         if ($action eq 'commitdiff') {
5100                                 # link to patch
5101                                 $patchno++;
5102                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5103                                               "patch") .
5104                                       " | ";
5105                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5106                                 # "commit" view and modified file (not onlu mode changed)
5107                                 print $cgi->a({-href => href(action=>"blobdiff",
5108                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5109                                                              hash_base=>$hash, hash_parent_base=>$parent,
5110                                                              file_name=>$diff->{'file'})},
5111                                               "diff") .
5112                                       " | ";
5113                         }
5114                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5115                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5116                                        "blob") . " | ";
5117                         if ($have_blame) {
5118                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5119                                                              file_name=>$diff->{'file'})},
5120                                               "blame") . " | ";
5121                         }
5122                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5123                                                      file_name=>$diff->{'file'})},
5124                                       "history");
5125                         print "</td>\n";
5126
5127                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5128                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5129                         my $nstatus = $status_name{$diff->{'status'}};
5130                         my $mode_chng = "";
5131                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5132                                 # mode also for directories, so we cannot use $to_mode_str
5133                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5134                         }
5135                         print "<td>" .
5136                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5137                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5138                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5139                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5140                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5141                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5142                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5143                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5144                               "<td class=\"link\">";
5145                         if ($action eq 'commitdiff') {
5146                                 # link to patch
5147                                 $patchno++;
5148                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5149                                               "patch") .
5150                                       " | ";
5151                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5152                                 # "commit" view and modified file (not only pure rename or copy)
5153                                 print $cgi->a({-href => href(action=>"blobdiff",
5154                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5155                                                              hash_base=>$hash, hash_parent_base=>$parent,
5156                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5157                                               "diff") .
5158                                       " | ";
5159                         }
5160                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5161                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5162                                       "blob") . " | ";
5163                         if ($have_blame) {
5164                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5165                                                              file_name=>$diff->{'to_file'})},
5166                                               "blame") . " | ";
5167                         }
5168                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5169                                                     file_name=>$diff->{'to_file'})},
5170                                       "history");
5171                         print "</td>\n";
5172
5173                 } # we should not encounter Unmerged (U) or Unknown (X) status
5174                 print "</tr>\n";
5175         }
5176         print "</tbody>" if $has_header;
5177         print "</table>\n";
5178 }
5179
5180 # Print context lines and then rem/add lines in a side-by-side manner.
5181 sub print_sidebyside_diff_lines {
5182         my ($ctx, $rem, $add) = @_;
5183
5184         # print context block before add/rem block
5185         if (@$ctx) {
5186                 print join '',
5187                         '<div class="chunk_block ctx">',
5188                                 '<div class="old">',
5189                                 @$ctx,
5190                                 '</div>',
5191                                 '<div class="new">',
5192                                 @$ctx,
5193                                 '</div>',
5194                         '</div>';
5195         }
5196
5197         if (!@$add) {
5198                 # pure removal
5199                 print join '',
5200                         '<div class="chunk_block rem">',
5201                                 '<div class="old">',
5202                                 @$rem,
5203                                 '</div>',
5204                         '</div>';
5205         } elsif (!@$rem) {
5206                 # pure addition
5207                 print join '',
5208                         '<div class="chunk_block add">',
5209                                 '<div class="new">',
5210                                 @$add,
5211                                 '</div>',
5212                         '</div>';
5213         } else {
5214                 print join '',
5215                         '<div class="chunk_block chg">',
5216                                 '<div class="old">',
5217                                 @$rem,
5218                                 '</div>',
5219                                 '<div class="new">',
5220                                 @$add,
5221                                 '</div>',
5222                         '</div>';
5223         }
5224 }
5225
5226 # Print context lines and then rem/add lines in inline manner.
5227 sub print_inline_diff_lines {
5228         my ($ctx, $rem, $add) = @_;
5229
5230         print @$ctx, @$rem, @$add;
5231 }
5232
5233 # Format removed and added line, mark changed part and HTML-format them.
5234 # Implementation is based on contrib/diff-highlight
5235 sub format_rem_add_lines_pair {
5236         my ($rem, $add, $num_parents) = @_;
5237
5238         # We need to untabify lines before split()'ing them;
5239         # otherwise offsets would be invalid.
5240         chomp $rem;
5241         chomp $add;
5242         $rem = untabify($rem);
5243         $add = untabify($add);
5244
5245         my @rem = split(//, $rem);
5246         my @add = split(//, $add);
5247         my ($esc_rem, $esc_add);
5248         # Ignore leading +/- characters for each parent.
5249         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5250         my ($prefix_has_nonspace, $suffix_has_nonspace);
5251
5252         my $shorter = (@rem < @add) ? @rem : @add;
5253         while ($prefix_len < $shorter) {
5254                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5255
5256                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5257                 $prefix_len++;
5258         }
5259
5260         while ($prefix_len + $suffix_len < $shorter) {
5261                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5262
5263                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5264                 $suffix_len++;
5265         }
5266
5267         # Mark lines that are different from each other, but have some common
5268         # part that isn't whitespace.  If lines are completely different, don't
5269         # mark them because that would make output unreadable, especially if
5270         # diff consists of multiple lines.
5271         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5272                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5273                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5274                 $esc_add = esc_html_hl_regions($add, 'marked',
5275                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5276         } else {
5277                 $esc_rem = esc_html($rem, -nbsp=>1);
5278                 $esc_add = esc_html($add, -nbsp=>1);
5279         }
5280
5281         return format_diff_line(\$esc_rem, 'rem'),
5282                format_diff_line(\$esc_add, 'add');
5283 }
5284
5285 # HTML-format diff context, removed and added lines.
5286 sub format_ctx_rem_add_lines {
5287         my ($ctx, $rem, $add, $num_parents) = @_;
5288         my (@new_ctx, @new_rem, @new_add);
5289         my $can_highlight = 0;
5290         my $is_combined = ($num_parents > 1);
5291
5292         # Highlight if every removed line has a corresponding added line.
5293         if (@$add > 0 && @$add == @$rem) {
5294                 $can_highlight = 1;
5295
5296                 # Highlight lines in combined diff only if the chunk contains
5297                 # diff between the same version, e.g.
5298                 #
5299                 #    - a
5300                 #   -  b
5301                 #    + c
5302                 #   +  d
5303                 #
5304                 # Otherwise the highlighting would be confusing.
5305                 if ($is_combined) {
5306                         for (my $i = 0; $i < @$add; $i++) {
5307                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5308                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5309
5310                                 $prefix_rem =~ s/-/+/g;
5311
5312                                 if ($prefix_rem ne $prefix_add) {
5313                                         $can_highlight = 0;
5314                                         last;
5315                                 }
5316                         }
5317                 }
5318         }
5319
5320         if ($can_highlight) {
5321                 for (my $i = 0; $i < @$add; $i++) {
5322                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5323                                 $rem->[$i], $add->[$i], $num_parents);
5324                         push @new_rem, $line_rem;
5325                         push @new_add, $line_add;
5326                 }
5327         } else {
5328                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5329                 @new_add = map { format_diff_line($_, 'add') } @$add;
5330         }
5331
5332         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5333
5334         return (\@new_ctx, \@new_rem, \@new_add);
5335 }
5336
5337 # Print context lines and then rem/add lines.
5338 sub print_diff_lines {
5339         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5340         my $is_combined = $num_parents > 1;
5341
5342         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5343                 $num_parents);
5344
5345         if ($diff_style eq 'sidebyside' && !$is_combined) {
5346                 print_sidebyside_diff_lines($ctx, $rem, $add);
5347         } else {
5348                 # default 'inline' style and unknown styles
5349                 print_inline_diff_lines($ctx, $rem, $add);
5350         }
5351 }
5352
5353 sub print_diff_chunk {
5354         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5355         my (@ctx, @rem, @add);
5356
5357         # The class of the previous line.
5358         my $prev_class = '';
5359
5360         return unless @chunk;
5361
5362         # incomplete last line might be among removed or added lines,
5363         # or both, or among context lines: find which
5364         for (my $i = 1; $i < @chunk; $i++) {
5365                 if ($chunk[$i][0] eq 'incomplete') {
5366                         $chunk[$i][0] = $chunk[$i-1][0];
5367                 }
5368         }
5369
5370         # guardian
5371         push @chunk, ["", ""];
5372
5373         foreach my $line_info (@chunk) {
5374                 my ($class, $line) = @$line_info;
5375
5376                 # print chunk headers
5377                 if ($class && $class eq 'chunk_header') {
5378                         print format_diff_line($line, $class, $from, $to);
5379                         next;
5380                 }
5381
5382                 ## print from accumulator when have some add/rem lines or end
5383                 # of chunk (flush context lines), or when have add and rem
5384                 # lines and new block is reached (otherwise add/rem lines could
5385                 # be reordered)
5386                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5387                     (@rem && @add && $class ne $prev_class)) {
5388                         print_diff_lines(\@ctx, \@rem, \@add,
5389                                          $diff_style, $num_parents);
5390                         @ctx = @rem = @add = ();
5391                 }
5392
5393                 ## adding lines to accumulator
5394                 # guardian value
5395                 last unless $line;
5396                 # rem, add or change
5397                 if ($class eq 'rem') {
5398                         push @rem, $line;
5399                 } elsif ($class eq 'add') {
5400                         push @add, $line;
5401                 }
5402                 # context line
5403                 if ($class eq 'ctx') {
5404                         push @ctx, $line;
5405                 }
5406
5407                 $prev_class = $class;
5408         }
5409 }
5410
5411 sub git_patchset_body {
5412         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5413         my ($hash_parent) = $hash_parents[0];
5414
5415         my $is_combined = (@hash_parents > 1);
5416         my $patch_idx = 0;
5417         my $patch_number = 0;
5418         my $patch_line;
5419         my $diffinfo;
5420         my $to_name;
5421         my (%from, %to);
5422         my @chunk; # for side-by-side diff
5423
5424         print "<div class=\"patchset\">\n";
5425
5426         # skip to first patch
5427         while ($patch_line = <$fd>) {
5428                 chomp $patch_line;
5429
5430                 last if ($patch_line =~ m/^diff /);
5431         }
5432
5433  PATCH:
5434         while ($patch_line) {
5435
5436                 # parse "git diff" header line
5437                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5438                         # $1 is from_name, which we do not use
5439                         $to_name = unquote($2);
5440                         $to_name =~ s!^b/!!;
5441                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5442                         # $1 is 'cc' or 'combined', which we do not use
5443                         $to_name = unquote($2);
5444                 } else {
5445                         $to_name = undef;
5446                 }
5447
5448                 # check if current patch belong to current raw line
5449                 # and parse raw git-diff line if needed
5450                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5451                         # this is continuation of a split patch
5452                         print "<div class=\"patch cont\">\n";
5453                 } else {
5454                         # advance raw git-diff output if needed
5455                         $patch_idx++ if defined $diffinfo;
5456
5457                         # read and prepare patch information
5458                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5459
5460                         # compact combined diff output can have some patches skipped
5461                         # find which patch (using pathname of result) we are at now;
5462                         if ($is_combined) {
5463                                 while ($to_name ne $diffinfo->{'to_file'}) {
5464                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5465                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5466                                               "</div>\n";  # class="patch"
5467
5468                                         $patch_idx++;
5469                                         $patch_number++;
5470
5471                                         last if $patch_idx > $#$difftree;
5472                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5473                                 }
5474                         }
5475
5476                         # modifies %from, %to hashes
5477                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5478
5479                         # this is first patch for raw difftree line with $patch_idx index
5480                         # we index @$difftree array from 0, but number patches from 1
5481                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5482                 }
5483
5484                 # git diff header
5485                 #assert($patch_line =~ m/^diff /) if DEBUG;
5486                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5487                 $patch_number++;
5488                 # print "git diff" header
5489                 print format_git_diff_header_line($patch_line, $diffinfo,
5490                                                   \%from, \%to);
5491
5492                 # print extended diff header
5493                 print "<div class=\"diff extended_header\">\n";
5494         EXTENDED_HEADER:
5495                 while ($patch_line = <$fd>) {
5496                         chomp $patch_line;
5497
5498                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5499
5500                         print format_extended_diff_header_line($patch_line, $diffinfo,
5501                                                                \%from, \%to);
5502                 }
5503                 print "</div>\n"; # class="diff extended_header"
5504
5505                 # from-file/to-file diff header
5506                 if (! $patch_line) {
5507                         print "</div>\n"; # class="patch"
5508                         last PATCH;
5509                 }
5510                 next PATCH if ($patch_line =~ m/^diff /);
5511                 #assert($patch_line =~ m/^---/) if DEBUG;
5512
5513                 my $last_patch_line = $patch_line;
5514                 $patch_line = <$fd>;
5515                 chomp $patch_line;
5516                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5517
5518                 print format_diff_from_to_header($last_patch_line, $patch_line,
5519                                                  $diffinfo, \%from, \%to,
5520                                                  @hash_parents);
5521
5522                 # the patch itself
5523         LINE:
5524                 while ($patch_line = <$fd>) {
5525                         chomp $patch_line;
5526
5527                         next PATCH if ($patch_line =~ m/^diff /);
5528
5529                         my $class = diff_line_class($patch_line, \%from, \%to);
5530
5531                         if ($class eq 'chunk_header') {
5532                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5533                                 @chunk = ();
5534                         }
5535
5536                         push @chunk, [ $class, $patch_line ];
5537                 }
5538
5539         } continue {
5540                 if (@chunk) {
5541                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5542                         @chunk = ();
5543                 }
5544                 print "</div>\n"; # class="patch"
5545         }
5546
5547         # for compact combined (--cc) format, with chunk and patch simplification
5548         # the patchset might be empty, but there might be unprocessed raw lines
5549         for (++$patch_idx if $patch_number > 0;
5550              $patch_idx < @$difftree;
5551              ++$patch_idx) {
5552                 # read and prepare patch information
5553                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5554
5555                 # generate anchor for "patch" links in difftree / whatchanged part
5556                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5557                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5558                       "</div>\n";  # class="patch"
5559
5560                 $patch_number++;
5561         }
5562
5563         if ($patch_number == 0) {
5564                 if (@hash_parents > 1) {
5565                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5566                 } else {
5567                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5568                 }
5569         }
5570
5571         print "</div>\n"; # class="patchset"
5572 }
5573
5574 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5575
5576 sub git_project_search_form {
5577         my ($searchtext, $search_use_regexp) = @_;
5578
5579         my $limit = '';
5580         if ($project_filter) {
5581                 $limit = " in '$project_filter/'";
5582         }
5583
5584         print "<div class=\"projsearch\">\n";
5585         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5586               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5587         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5588                 if (defined $project_filter);
5589         print $cgi->textfield(-name => 's', -value => $searchtext,
5590                               -title => "Search project by name and description$limit",
5591                               -size => 60) . "\n" .
5592               "<span title=\"Extended regular expression\">" .
5593               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5594                              -checked => $search_use_regexp) .
5595               "</span>\n" .
5596               $cgi->submit(-name => 'btnS', -value => 'Search') .
5597               $cgi->end_form() . "\n" .
5598               $cgi->a({-href => href(project => undef, searchtext => undef,
5599                                      project_filter => $project_filter)},
5600                       esc_html("List all projects$limit")) . "<br />\n";
5601         print "</div>\n";
5602 }
5603
5604 # entry for given @keys needs filling if at least one of keys in list
5605 # is not present in %$project_info
5606 sub project_info_needs_filling {
5607         my ($project_info, @keys) = @_;
5608
5609         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5610         foreach my $key (@keys) {
5611                 if (!exists $project_info->{$key}) {
5612                         return 1;
5613                 }
5614         }
5615         return;
5616 }
5617
5618 # fills project list info (age, description, owner, category, forks, etc.)
5619 # for each project in the list, removing invalid projects from
5620 # returned list, or fill only specified info.
5621 #
5622 # Invalid projects are removed from the returned list if and only if you
5623 # ask 'age' or 'age_string' to be filled, because they are the only fields
5624 # that run unconditionally git command that requires repository, and
5625 # therefore do always check if project repository is invalid.
5626 #
5627 # USAGE:
5628 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5629 #   ensures that 'descr_long' and 'ctags' fields are filled
5630 # * @project_list = fill_project_list_info(\@project_list)
5631 #   ensures that all fields are filled (and invalid projects removed)
5632 #
5633 # NOTE: modifies $projlist, but does not remove entries from it
5634 sub fill_project_list_info {
5635         my ($projlist, @wanted_keys) = @_;
5636         my @projects;
5637         my $filter_set = sub { return @_; };
5638         if (@wanted_keys) {
5639                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5640                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5641         }
5642
5643         my $show_ctags = gitweb_check_feature('ctags');
5644  PROJECT:
5645         foreach my $pr (@$projlist) {
5646                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5647                         my (@activity) = git_get_last_activity($pr->{'path'});
5648                         unless (@activity) {
5649                                 next PROJECT;
5650                         }
5651                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5652                 }
5653                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5654                         my $descr = git_get_project_description($pr->{'path'}) || "";
5655                         $descr = to_utf8($descr);
5656                         $pr->{'descr_long'} = $descr;
5657                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5658                 }
5659                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5660                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5661                 }
5662                 if ($show_ctags &&
5663                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5664                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5665                 }
5666                 if ($projects_list_group_categories &&
5667                     project_info_needs_filling($pr, $filter_set->('category'))) {
5668                         my $cat = git_get_project_category($pr->{'path'}) ||
5669                                                            $project_list_default_category;
5670                         $pr->{'category'} = to_utf8($cat);
5671                 }
5672
5673                 push @projects, $pr;
5674         }
5675
5676         return @projects;
5677 }
5678
5679 sub sort_projects_list {
5680         my ($projlist, $order) = @_;
5681
5682         sub order_str {
5683                 my $key = shift;
5684                 return sub { $a->{$key} cmp $b->{$key} };
5685         }
5686
5687         sub order_num_then_undef {
5688                 my $key = shift;
5689                 return sub {
5690                         defined $a->{$key} ?
5691                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5692                                 (defined $b->{$key} ? 1 : 0)
5693                 };
5694         }
5695
5696         my %orderings = (
5697                 project => order_str('path'),
5698                 descr => order_str('descr_long'),
5699                 owner => order_str('owner'),
5700                 age => order_num_then_undef('age'),
5701         );
5702
5703         my $ordering = $orderings{$order};
5704         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5705 }
5706
5707 # returns a hash of categories, containing the list of project
5708 # belonging to each category
5709 sub build_projlist_by_category {
5710         my ($projlist, $from, $to) = @_;
5711         my %categories;
5712
5713         $from = 0 unless defined $from;
5714         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5715
5716         for (my $i = $from; $i <= $to; $i++) {
5717                 my $pr = $projlist->[$i];
5718                 push @{$categories{ $pr->{'category'} }}, $pr;
5719         }
5720
5721         return wantarray ? %categories : \%categories;
5722 }
5723
5724 # print 'sort by' <th> element, generating 'sort by $name' replay link
5725 # if that order is not selected
5726 sub print_sort_th {
5727         print format_sort_th(@_);
5728 }
5729
5730 sub format_sort_th {
5731         my ($name, $order, $header) = @_;
5732         my $sort_th = "";
5733         $header ||= ucfirst($name);
5734
5735         if ($order eq $name) {
5736                 $sort_th .= "<th>$header</th>\n";
5737         } else {
5738                 $sort_th .= "<th>" .
5739                             $cgi->a({-href => href(-replay=>1, order=>$name),
5740                                      -class => "header"}, $header) .
5741                             "</th>\n";
5742         }
5743
5744         return $sort_th;
5745 }
5746
5747 sub git_project_list_rows {
5748         my ($projlist, $from, $to, $check_forks) = @_;
5749
5750         $from = 0 unless defined $from;
5751         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5752
5753         my $alternate = 1;
5754         for (my $i = $from; $i <= $to; $i++) {
5755                 my $pr = $projlist->[$i];
5756
5757                 if ($alternate) {
5758                         print "<tr class=\"dark\">\n";
5759                 } else {
5760                         print "<tr class=\"light\">\n";
5761                 }
5762                 $alternate ^= 1;
5763
5764                 if ($check_forks) {
5765                         print "<td>";
5766                         if ($pr->{'forks'}) {
5767                                 my $nforks = scalar @{$pr->{'forks'}};
5768                                 if ($nforks > 0) {
5769                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5770                                                        -title => "$nforks forks"}, "+");
5771                                 } else {
5772                                         print $cgi->span({-title => "$nforks forks"}, "+");
5773                                 }
5774                         }
5775                         print "</td>\n";
5776                 }
5777                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5778                                         -class => "list"},
5779                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5780                       "</td>\n" .
5781                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5782                                         -class => "list",
5783                                         -title => $pr->{'descr_long'}},
5784                                         $search_regexp
5785                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5786                                                                     $pr->{'descr'}, $search_regexp)
5787                                         : esc_html($pr->{'descr'})) .
5788                       "</td>\n";
5789                 unless ($omit_owner) {
5790                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5791                 }
5792                 unless ($omit_age_column) {
5793                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5794                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5795                 }
5796                 print"<td class=\"link\">" .
5797                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5798                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5799                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5800                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5801                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5802                       "</td>\n" .
5803                       "</tr>\n";
5804         }
5805 }
5806
5807 sub git_project_list_body {
5808         # actually uses global variable $project
5809         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5810         my @projects = @$projlist;
5811
5812         my $check_forks = gitweb_check_feature('forks');
5813         my $show_ctags  = gitweb_check_feature('ctags');
5814         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5815         $check_forks = undef
5816                 if ($tagfilter || $search_regexp);
5817
5818         # filtering out forks before filling info allows to do less work
5819         @projects = filter_forks_from_projects_list(\@projects)
5820                 if ($check_forks);
5821         # search_projects_list pre-fills required info
5822         @projects = search_projects_list(\@projects,
5823                                          'search_regexp' => $search_regexp,
5824                                          'tagfilter'  => $tagfilter)
5825                 if ($tagfilter || $search_regexp);
5826         # fill the rest
5827         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5828         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5829         push @all_fields, 'owner' unless($omit_owner);
5830         @projects = fill_project_list_info(\@projects, @all_fields);
5831
5832         $order ||= $default_projects_order;
5833         $from = 0 unless defined $from;
5834         $to = $#projects if (!defined $to || $#projects < $to);
5835
5836         # short circuit
5837         if ($from > $to) {
5838                 print "<center>\n".
5839                       "<b>No such projects found</b><br />\n".
5840                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5841                       "</center>\n<br />\n";
5842                 return;
5843         }
5844
5845         @projects = sort_projects_list(\@projects, $order);
5846
5847         if ($show_ctags) {
5848                 my $ctags = git_gather_all_ctags(\@projects);
5849                 my $cloud = git_populate_project_tagcloud($ctags);
5850                 print git_show_project_tagcloud($cloud, 64);
5851         }
5852
5853         print "<table class=\"project_list\">\n";
5854         unless ($no_header) {
5855                 print "<tr>\n";
5856                 if ($check_forks) {
5857                         print "<th></th>\n";
5858                 }
5859                 print_sort_th('project', $order, 'Project');
5860                 print_sort_th('descr', $order, 'Description');
5861                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5862                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5863                 print "<th></th>\n" . # for links
5864                       "</tr>\n";
5865         }
5866
5867         if ($projects_list_group_categories) {
5868                 # only display categories with projects in the $from-$to window
5869                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5870                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5871                 foreach my $cat (sort keys %categories) {
5872                         unless ($cat eq "") {
5873                                 print "<tr>\n";
5874                                 if ($check_forks) {
5875                                         print "<td></td>\n";
5876                                 }
5877                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5878                                 print "</tr>\n";
5879                         }
5880
5881                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5882                 }
5883         } else {
5884                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5885         }
5886
5887         if (defined $extra) {
5888                 print "<tr>\n";
5889                 if ($check_forks) {
5890                         print "<td></td>\n";
5891                 }
5892                 print "<td colspan=\"5\">$extra</td>\n" .
5893                       "</tr>\n";
5894         }
5895         print "</table>\n";
5896 }
5897
5898 sub git_log_body {
5899         # uses global variable $project
5900         my ($commitlist, $from, $to, $refs, $extra) = @_;
5901
5902         $from = 0 unless defined $from;
5903         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5904
5905         for (my $i = 0; $i <= $to; $i++) {
5906                 my %co = %{$commitlist->[$i]};
5907                 next if !%co;
5908                 my $commit = $co{'id'};
5909                 my $ref = format_ref_marker($refs, $commit);
5910                 git_print_header_div('commit',
5911                                "<span class=\"age\">$co{'age_string'}</span>" .
5912                                esc_html($co{'title'}) . $ref,
5913                                $commit);
5914                 print "<div class=\"title_text\">\n" .
5915                       "<div class=\"log_link\">\n" .
5916                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5917                       " | " .
5918                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5919                       " | " .
5920                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5921                       "<br/>\n" .
5922                       "</div>\n";
5923                       git_print_authorship(\%co, -tag => 'span');
5924                       print "<br/>\n</div>\n";
5925
5926                 print "<div class=\"log_body\">\n";
5927                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5928                 print "</div>\n";
5929         }
5930         if ($extra) {
5931                 print "<div class=\"page_nav\">\n";
5932                 print "$extra\n";
5933                 print "</div>\n";
5934         }
5935 }
5936
5937 sub git_shortlog_body {
5938         # uses global variable $project
5939         my ($commitlist, $from, $to, $refs, $extra) = @_;
5940
5941         $from = 0 unless defined $from;
5942         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5943
5944         print "<table class=\"shortlog\">\n";
5945         my $alternate = 1;
5946         for (my $i = $from; $i <= $to; $i++) {
5947                 my %co = %{$commitlist->[$i]};
5948                 my $commit = $co{'id'};
5949                 my $ref = format_ref_marker($refs, $commit);
5950                 if ($alternate) {
5951                         print "<tr class=\"dark\">\n";
5952                 } else {
5953                         print "<tr class=\"light\">\n";
5954                 }
5955                 $alternate ^= 1;
5956                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5957                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5958                       format_author_html('td', \%co, 10) . "<td>";
5959                 print format_subject_html($co{'title'}, $co{'title_short'},
5960                                           href(action=>"commit", hash=>$commit), $ref);
5961                 print "</td>\n" .
5962                       "<td class=\"link\">" .
5963                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5964                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5965                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5966                 my $snapshot_links = format_snapshot_links($commit);
5967                 if (defined $snapshot_links) {
5968                         print " | " . $snapshot_links;
5969                 }
5970                 print "</td>\n" .
5971                       "</tr>\n";
5972         }
5973         if (defined $extra) {
5974                 print "<tr>\n" .
5975                       "<td colspan=\"4\">$extra</td>\n" .
5976                       "</tr>\n";
5977         }
5978         print "</table>\n";
5979 }
5980
5981 sub git_history_body {
5982         # Warning: assumes constant type (blob or tree) during history
5983         my ($commitlist, $from, $to, $refs, $extra,
5984             $file_name, $file_hash, $ftype) = @_;
5985
5986         $from = 0 unless defined $from;
5987         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5988
5989         print "<table class=\"history\">\n";
5990         my $alternate = 1;
5991         for (my $i = $from; $i <= $to; $i++) {
5992                 my %co = %{$commitlist->[$i]};
5993                 if (!%co) {
5994                         next;
5995                 }
5996                 my $commit = $co{'id'};
5997
5998                 my $ref = format_ref_marker($refs, $commit);
5999
6000                 if ($alternate) {
6001                         print "<tr class=\"dark\">\n";
6002                 } else {
6003                         print "<tr class=\"light\">\n";
6004                 }
6005                 $alternate ^= 1;
6006                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6007         # shortlog:   format_author_html('td', \%co, 10)
6008                       format_author_html('td', \%co, 15, 3) . "<td>";
6009                 # originally git_history used chop_str($co{'title'}, 50)
6010                 print format_subject_html($co{'title'}, $co{'title_short'},
6011                                           href(action=>"commit", hash=>$commit), $ref);
6012                 print "</td>\n" .
6013                       "<td class=\"link\">" .
6014                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
6015                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
6016
6017                 if ($ftype eq 'blob') {
6018                         print " | " .
6019                               $cgi->a({-href => href(action=>"blob_plain", hash_base=>$commit, file_name=>$file_name)}, "raw");
6020
6021                         my $blob_current = $file_hash;
6022                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
6023                         if (defined $blob_current && defined $blob_parent &&
6024                                         $blob_current ne $blob_parent) {
6025                                 print " | " .
6026                                         $cgi->a({-href => href(action=>"blobdiff",
6027                                                                hash=>$blob_current, hash_parent=>$blob_parent,
6028                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
6029                                                                file_name=>$file_name)},
6030                                                 "diff to current");
6031                         }
6032                 }
6033                 print "</td>\n" .
6034                       "</tr>\n";
6035         }
6036         if (defined $extra) {
6037                 print "<tr>\n" .
6038                       "<td colspan=\"4\">$extra</td>\n" .
6039                       "</tr>\n";
6040         }
6041         print "</table>\n";
6042 }
6043
6044 sub git_tags_body {
6045         # uses global variable $project
6046         my ($taglist, $from, $to, $extra) = @_;
6047         $from = 0 unless defined $from;
6048         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
6049
6050         print "<table class=\"tags\">\n";
6051         my $alternate = 1;
6052         for (my $i = $from; $i <= $to; $i++) {
6053                 my $entry = $taglist->[$i];
6054                 my %tag = %$entry;
6055                 my $comment = $tag{'subject'};
6056                 my $comment_short;
6057                 if (defined $comment) {
6058                         $comment_short = chop_str($comment, 30, 5);
6059                 }
6060                 if ($alternate) {
6061                         print "<tr class=\"dark\">\n";
6062                 } else {
6063                         print "<tr class=\"light\">\n";
6064                 }
6065                 $alternate ^= 1;
6066                 if (defined $tag{'age'}) {
6067                         print "<td><i>$tag{'age'}</i></td>\n";
6068                 } else {
6069                         print "<td></td>\n";
6070                 }
6071                 print "<td>" .
6072                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6073                                -class => "list name"}, esc_html($tag{'name'})) .
6074                       "</td>\n" .
6075                       "<td>";
6076                 if (defined $comment) {
6077                         print format_subject_html($comment, $comment_short,
6078                                                   href(action=>"tag", hash=>$tag{'id'}));
6079                 }
6080                 print "</td>\n" .
6081                       "<td class=\"selflink\">";
6082                 if ($tag{'type'} eq "tag") {
6083                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6084                 } else {
6085                         print "&nbsp;";
6086                 }
6087                 print "</td>\n" .
6088                       "<td class=\"link\">" . " | " .
6089                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6090                 if ($tag{'reftype'} eq "commit") {
6091                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6092                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6093                 } elsif ($tag{'reftype'} eq "blob") {
6094                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6095                 }
6096                 print "</td>\n" .
6097                       "</tr>";
6098         }
6099         if (defined $extra) {
6100                 print "<tr>\n" .
6101                       "<td colspan=\"5\">$extra</td>\n" .
6102                       "</tr>\n";
6103         }
6104         print "</table>\n";
6105 }
6106
6107 sub git_heads_body {
6108         # uses global variable $project
6109         my ($headlist, $head_at, $from, $to, $extra) = @_;
6110         $from = 0 unless defined $from;
6111         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6112
6113         print "<table class=\"heads\">\n";
6114         my $alternate = 1;
6115         for (my $i = $from; $i <= $to; $i++) {
6116                 my $entry = $headlist->[$i];
6117                 my %ref = %$entry;
6118                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6119                 if ($alternate) {
6120                         print "<tr class=\"dark\">\n";
6121                 } else {
6122                         print "<tr class=\"light\">\n";
6123                 }
6124                 $alternate ^= 1;
6125                 print "<td><i>$ref{'age'}</i></td>\n" .
6126                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6127                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6128                                -class => "list name"},esc_html($ref{'name'})) .
6129                       "</td>\n" .
6130                       "<td class=\"link\">" .
6131                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6132                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6133                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6134                       "</td>\n" .
6135                       "</tr>";
6136         }
6137         if (defined $extra) {
6138                 print "<tr>\n" .
6139                       "<td colspan=\"3\">$extra</td>\n" .
6140                       "</tr>\n";
6141         }
6142         print "</table>\n";
6143 }
6144
6145 # Display a single remote block
6146 sub git_remote_block {
6147         my ($remote, $rdata, $limit, $head) = @_;
6148
6149         my $heads = $rdata->{'heads'};
6150         my $fetch = $rdata->{'fetch'};
6151         my $push = $rdata->{'push'};
6152
6153         my $urls_table = "<table class=\"projects_list\">\n" ;
6154
6155         if (defined $fetch) {
6156                 if ($fetch eq $push) {
6157                         $urls_table .= format_repo_url("URL", $fetch);
6158                 } else {
6159                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6160                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6161                 }
6162         } elsif (defined $push) {
6163                 $urls_table .= format_repo_url("Push URL", $push);
6164         } else {
6165                 $urls_table .= format_repo_url("", "No remote URL");
6166         }
6167
6168         $urls_table .= "</table>\n";
6169
6170         my $dots;
6171         if (defined $limit && $limit < @$heads) {
6172                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6173         }
6174
6175         print $urls_table;
6176         git_heads_body($heads, $head, 0, $limit, $dots);
6177 }
6178
6179 # Display a list of remote names with the respective fetch and push URLs
6180 sub git_remotes_list {
6181         my ($remotedata, $limit) = @_;
6182         print "<table class=\"heads\">\n";
6183         my $alternate = 1;
6184         my @remotes = sort keys %$remotedata;
6185
6186         my $limited = $limit && $limit < @remotes;
6187
6188         $#remotes = $limit - 1 if $limited;
6189
6190         while (my $remote = shift @remotes) {
6191                 my $rdata = $remotedata->{$remote};
6192                 my $fetch = $rdata->{'fetch'};
6193                 my $push = $rdata->{'push'};
6194                 if ($alternate) {
6195                         print "<tr class=\"dark\">\n";
6196                 } else {
6197                         print "<tr class=\"light\">\n";
6198                 }
6199                 $alternate ^= 1;
6200                 print "<td>" .
6201                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6202                                -class=> "list name"},esc_html($remote)) .
6203                       "</td>";
6204                 print "<td class=\"link\">" .
6205                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6206                       " | " .
6207                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6208                       "</td>";
6209
6210                 print "</tr>\n";
6211         }
6212
6213         if ($limited) {
6214                 print "<tr>\n" .
6215                       "<td colspan=\"3\">" .
6216                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6217                       "</td>\n" . "</tr>\n";
6218         }
6219
6220         print "</table>";
6221 }
6222
6223 # Display remote heads grouped by remote, unless there are too many
6224 # remotes, in which case we only display the remote names
6225 sub git_remotes_body {
6226         my ($remotedata, $limit, $head) = @_;
6227         if ($limit and $limit < keys %$remotedata) {
6228                 git_remotes_list($remotedata, $limit);
6229         } else {
6230                 fill_remote_heads($remotedata);
6231                 while (my ($remote, $rdata) = each %$remotedata) {
6232                         git_print_section({-class=>"remote", -id=>$remote},
6233                                 ["remotes", $remote, $remote], sub {
6234                                         git_remote_block($remote, $rdata, $limit, $head);
6235                                 });
6236                 }
6237         }
6238 }
6239
6240 sub git_search_message {
6241         my %co = @_;
6242
6243         my $greptype;
6244         if ($searchtype eq 'commit') {
6245                 $greptype = "--grep=";
6246         } elsif ($searchtype eq 'author') {
6247                 $greptype = "--author=";
6248         } elsif ($searchtype eq 'committer') {
6249                 $greptype = "--committer=";
6250         }
6251         $greptype .= $searchtext;
6252         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6253                                        $greptype, '--regexp-ignore-case',
6254                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6255
6256         my $paging_nav = '';
6257         if ($page > 0) {
6258                 $paging_nav .=
6259                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6260                                 "first") .
6261                         " &sdot; " .
6262                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6263                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6264         } else {
6265                 $paging_nav .= "first &sdot; prev";
6266         }
6267         my $next_link = '';
6268         if ($#commitlist >= 100) {
6269                 $next_link =
6270                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6271                                  -accesskey => "n", -title => "Alt-n"}, "next");
6272                 $paging_nav .= " &sdot; $next_link";
6273         } else {
6274                 $paging_nav .= " &sdot; next";
6275         }
6276
6277         git_header_html();
6278
6279         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6280         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6281         if ($page == 0 && !@commitlist) {
6282                 print "<p>No match.</p>\n";
6283         } else {
6284                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6285         }
6286
6287         git_footer_html();
6288 }
6289
6290 sub git_search_changes {
6291         my %co = @_;
6292
6293         local $/ = "\n";
6294         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6295                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6296                 ($search_use_regexp ? '--pickaxe-regex' : ())
6297                         or die_error(500, "Open git-log failed");
6298
6299         git_header_html();
6300
6301         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6302         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6303
6304         print "<table class=\"pickaxe search\">\n";
6305         my $alternate = 1;
6306         undef %co;
6307         my @files;
6308         while (my $line = <$fd>) {
6309                 chomp $line;
6310                 next unless $line;
6311
6312                 my %set = parse_difftree_raw_line($line);
6313                 if (defined $set{'commit'}) {
6314                         # finish previous commit
6315                         if (%co) {
6316                                 print "</td>\n" .
6317                                       "<td class=\"link\">" .
6318                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6319                                               "commit") .
6320                                       " | " .
6321                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6322                                                              hash_base=>$co{'id'})},
6323                                               "tree") .
6324                                       "</td>\n" .
6325                                       "</tr>\n";
6326                         }
6327
6328                         if ($alternate) {
6329                                 print "<tr class=\"dark\">\n";
6330                         } else {
6331                                 print "<tr class=\"light\">\n";
6332                         }
6333                         $alternate ^= 1;
6334                         %co = parse_commit($set{'commit'});
6335                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6336                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6337                               "<td><i>$author</i></td>\n" .
6338                               "<td>" .
6339                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6340                                       -class => "list subject"},
6341                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6342                 } elsif (defined $set{'to_id'}) {
6343                         next if is_deleted(\%set);
6344
6345                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6346                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6347                                       -class => "list"},
6348                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6349                               "<br/>\n";
6350                 }
6351         }
6352         close $fd;
6353
6354         # finish last commit (warning: repetition!)
6355         if (%co) {
6356                 print "</td>\n" .
6357                       "<td class=\"link\">" .
6358                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6359                               "commit") .
6360                       " | " .
6361                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6362                                              hash_base=>$co{'id'})},
6363                               "tree") .
6364                       "</td>\n" .
6365                       "</tr>\n";
6366         }
6367
6368         print "</table>\n";
6369
6370         git_footer_html();
6371 }
6372
6373 sub git_search_files {
6374         my %co = @_;
6375
6376         local $/ = "\n";
6377         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6378                 $search_use_regexp ? ('-E', '-i') : '-F',
6379                 $searchtext, $co{'tree'}
6380                         or die_error(500, "Open git-grep failed");
6381
6382         git_header_html();
6383
6384         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6385         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6386
6387         print "<table class=\"grep_search\">\n";
6388         my $alternate = 1;
6389         my $matches = 0;
6390         my $lastfile = '';
6391         my $file_href;
6392         while (my $line = <$fd>) {
6393                 chomp $line;
6394                 my ($file, $lno, $ltext, $binary);
6395                 last if ($matches++ > 1000);
6396                 if ($line =~ /^Binary file (.+) matches$/) {
6397                         $file = $1;
6398                         $binary = 1;
6399                 } else {
6400                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6401                         $file =~ s/^$co{'tree'}://;
6402                 }
6403                 if ($file ne $lastfile) {
6404                         $lastfile and print "</td></tr>\n";
6405                         if ($alternate++) {
6406                                 print "<tr class=\"dark\">\n";
6407                         } else {
6408                                 print "<tr class=\"light\">\n";
6409                         }
6410                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6411                                           file_name=>$file);
6412                         print "<td class=\"list\">".
6413                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6414                         print "</td><td>\n";
6415                         $lastfile = $file;
6416                 }
6417                 if ($binary) {
6418                         print "<div class=\"binary\">Binary file</div>\n";
6419                 } else {
6420                         $ltext = untabify($ltext);
6421                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6422                                 $ltext = esc_html($1, -nbsp=>1);
6423                                 $ltext .= '<span class="match">';
6424                                 $ltext .= esc_html($2, -nbsp=>1);
6425                                 $ltext .= '</span>';
6426                                 $ltext .= esc_html($3, -nbsp=>1);
6427                         } else {
6428                                 $ltext = esc_html($ltext, -nbsp=>1);
6429                         }
6430                         print "<div class=\"pre\">" .
6431                                 $cgi->a({-href => $file_href.'#l'.$lno,
6432                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6433                                 ' ' .  $ltext . "</div>\n";
6434                 }
6435         }
6436         if ($lastfile) {
6437                 print "</td></tr>\n";
6438                 if ($matches > 1000) {
6439                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6440                 }
6441         } else {
6442                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6443         }
6444         close $fd;
6445
6446         print "</table>\n";
6447
6448         git_footer_html();
6449 }
6450
6451 sub git_search_grep_body {
6452         my ($commitlist, $from, $to, $extra) = @_;
6453         $from = 0 unless defined $from;
6454         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6455
6456         print "<table class=\"commit_search\">\n";
6457         my $alternate = 1;
6458         for (my $i = $from; $i <= $to; $i++) {
6459                 my %co = %{$commitlist->[$i]};
6460                 if (!%co) {
6461                         next;
6462                 }
6463                 my $commit = $co{'id'};
6464                 if ($alternate) {
6465                         print "<tr class=\"dark\">\n";
6466                 } else {
6467                         print "<tr class=\"light\">\n";
6468                 }
6469                 $alternate ^= 1;
6470                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6471                       format_author_html('td', \%co, 15, 5) .
6472                       "<td>" .
6473                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6474                                -class => "list subject"},
6475                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6476                 my $comment = $co{'comment'};
6477                 foreach my $line (@$comment) {
6478                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6479                                 my ($lead, $match, $trail) = ($1, $2, $3);
6480                                 $match = chop_str($match, 70, 5, 'center');
6481                                 my $contextlen = int((80 - length($match))/2);
6482                                 $contextlen = 30 if ($contextlen > 30);
6483                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6484                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6485
6486                                 $lead  = esc_html($lead);
6487                                 $match = esc_html($match);
6488                                 $trail = esc_html($trail);
6489
6490                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6491                         }
6492                 }
6493                 print "</td>\n" .
6494                       "<td class=\"link\">" .
6495                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6496                       " | " .
6497                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6498                       " | " .
6499                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6500                 print "</td>\n" .
6501                       "</tr>\n";
6502         }
6503         if (defined $extra) {
6504                 print "<tr>\n" .
6505                       "<td colspan=\"3\">$extra</td>\n" .
6506                       "</tr>\n";
6507         }
6508         print "</table>\n";
6509 }
6510
6511 ## ======================================================================
6512 ## ======================================================================
6513 ## actions
6514
6515 sub git_project_list {
6516         my $order = $input_params{'order'};
6517         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6518                 die_error(400, "Unknown order parameter");
6519         }
6520
6521         my @list = git_get_projects_list($project_filter, $strict_export);
6522         if (!@list) {
6523                 die_error(404, "No projects found");
6524         }
6525
6526         git_header_html();
6527         if (defined $home_text && -f $home_text) {
6528                 print "<div class=\"index_include\">\n";
6529                 insert_file($home_text);
6530                 print "</div>\n";
6531         }
6532
6533         git_project_search_form($searchtext, $search_use_regexp);
6534         git_project_list_body(\@list, $order);
6535         git_footer_html();
6536 }
6537
6538 sub git_forks {
6539         my $order = $input_params{'order'};
6540         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6541                 die_error(400, "Unknown order parameter");
6542         }
6543
6544         my $filter = $project;
6545         $filter =~ s/\.git$//;
6546         my @list = git_get_projects_list($filter);
6547         if (!@list) {
6548                 die_error(404, "No forks found");
6549         }
6550
6551         git_header_html();
6552         git_print_page_nav('','');
6553         git_print_header_div('summary', "$project forks");
6554         git_project_list_body(\@list, $order);
6555         git_footer_html();
6556 }
6557
6558 sub git_project_index {
6559         my @projects = git_get_projects_list($project_filter, $strict_export);
6560         if (!@projects) {
6561                 die_error(404, "No projects found");
6562         }
6563
6564         print $cgi->header(
6565                 -type => 'text/plain',
6566                 -charset => 'utf-8',
6567                 -content_disposition => 'inline; filename="index.aux"');
6568
6569         foreach my $pr (@projects) {
6570                 if (!exists $pr->{'owner'}) {
6571                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6572                 }
6573
6574                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6575                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6576                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6577                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6578                 $path  =~ s/ /\+/g;
6579                 $owner =~ s/ /\+/g;
6580
6581                 print "$path $owner\n";
6582         }
6583 }
6584
6585 sub git_summary {
6586         my $descr = git_get_project_description($project) || "none";
6587         my %co = parse_commit("HEAD");
6588         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6589         my $head = $co{'id'};
6590         my $remote_heads = gitweb_check_feature('remote_heads');
6591
6592         my $owner = git_get_project_owner($project);
6593
6594         my $refs = git_get_references();
6595         # These get_*_list functions return one more to allow us to see if
6596         # there are more ...
6597         my @taglist  = git_get_tags_list(16);
6598         my @headlist = git_get_heads_list(16);
6599         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6600         my @forklist;
6601         my $check_forks = gitweb_check_feature('forks');
6602
6603         if ($check_forks) {
6604                 # find forks of a project
6605                 my $filter = $project;
6606                 $filter =~ s/\.git$//;
6607                 @forklist = git_get_projects_list($filter);
6608                 # filter out forks of forks
6609                 @forklist = filter_forks_from_projects_list(\@forklist)
6610                         if (@forklist);
6611         }
6612
6613         git_header_html();
6614         git_print_page_nav('summary','', $head);
6615
6616         print "<div class=\"title\">&nbsp;</div>\n";
6617         print "<table class=\"projects_list\">\n" .
6618               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6619         if ($owner and not $omit_owner) {
6620                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6621         }
6622         if (defined $cd{'rfc2822'}) {
6623                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6624                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6625         }
6626
6627         # use per project git URL list in $projectroot/$project/cloneurl
6628         # or make project git URL from git base URL and project name
6629         my $url_tag = "URL";
6630         my @url_list = git_get_project_url_list($project);
6631         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6632         foreach my $git_url (@url_list) {
6633                 next unless $git_url;
6634                 print format_repo_url($url_tag, $git_url);
6635                 $url_tag = "";
6636         }
6637
6638         # Tag cloud
6639         my $show_ctags = gitweb_check_feature('ctags');
6640         if ($show_ctags) {
6641                 my $ctags = git_get_project_ctags($project);
6642                 if (%$ctags) {
6643                         # without ability to add tags, don't show if there are none
6644                         my $cloud = git_populate_project_tagcloud($ctags);
6645                         print "<tr id=\"metadata_ctags\">" .
6646                               "<td>content tags</td>" .
6647                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6648                               "</tr>\n";
6649                 }
6650         }
6651
6652         print "</table>\n";
6653
6654         # If XSS prevention is on, we don't include README.html.
6655         # TODO: Allow a readme in some safe format.
6656         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6657                 print "<div class=\"title\">readme</div>\n" .
6658                       "<div class=\"readme\">\n";
6659                 insert_file("$projectroot/$project/README.html");
6660                 print "\n</div>\n"; # class="readme"
6661         }
6662
6663         # we need to request one more than 16 (0..15) to check if
6664         # those 16 are all
6665         my @commitlist = $head ? parse_commits($head, 17) : ();
6666         if (@commitlist) {
6667                 git_print_header_div('shortlog');
6668                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6669                                   $#commitlist <=  15 ? undef :
6670                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6671         }
6672
6673         if (@taglist) {
6674                 git_print_header_div('tags');
6675                 git_tags_body(\@taglist, 0, 15,
6676                               $#taglist <=  15 ? undef :
6677                               $cgi->a({-href => href(action=>"tags")}, "..."));
6678         }
6679
6680         if (@headlist) {
6681                 git_print_header_div('heads');
6682                 git_heads_body(\@headlist, $head, 0, 15,
6683                                $#headlist <= 15 ? undef :
6684                                $cgi->a({-href => href(action=>"heads")}, "..."));
6685         }
6686
6687         if (%remotedata) {
6688                 git_print_header_div('remotes');
6689                 git_remotes_body(\%remotedata, 15, $head);
6690         }
6691
6692         if (@forklist) {
6693                 git_print_header_div('forks');
6694                 git_project_list_body(\@forklist, 'age', 0, 15,
6695                                       $#forklist <= 15 ? undef :
6696                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6697                                       'no_header');
6698         }
6699
6700         git_footer_html();
6701 }
6702
6703 sub git_tag {
6704         my %tag = parse_tag($hash);
6705
6706         if (! %tag) {
6707                 die_error(404, "Unknown tag object");
6708         }
6709
6710         my $head = git_get_head_hash($project);
6711         git_header_html();
6712         git_print_page_nav('','', $head,undef,$head);
6713         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6714         print "<div class=\"title_text\">\n" .
6715               "<table class=\"object_header\">\n" .
6716               "<tr>\n" .
6717               "<td>object</td>\n" .
6718               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6719                                $tag{'object'}) . "</td>\n" .
6720               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6721                                               $tag{'type'}) . "</td>\n" .
6722               "</tr>\n";
6723         if (defined($tag{'author'})) {
6724                 git_print_authorship_rows(\%tag, 'author');
6725         }
6726         print "</table>\n\n" .
6727               "</div>\n";
6728         print "<div class=\"page_body\">";
6729         my $comment = $tag{'comment'};
6730         foreach my $line (@$comment) {
6731                 chomp $line;
6732                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6733         }
6734         print "</div>\n";
6735         git_footer_html();
6736 }
6737
6738 sub git_blame_common {
6739         my $format = shift || 'porcelain';
6740         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6741                 $format = 'incremental';
6742                 $action = 'blame_incremental'; # for page title etc
6743         }
6744
6745         # permissions
6746         gitweb_check_feature('blame')
6747                 or die_error(403, "Blame view not allowed");
6748
6749         # error checking
6750         die_error(400, "No file name given") unless $file_name;
6751         $hash_base ||= git_get_head_hash($project);
6752         die_error(404, "Couldn't find base commit") unless $hash_base;
6753         my %co = parse_commit($hash_base)
6754                 or die_error(404, "Commit not found");
6755         my $ftype = "blob";
6756         if (!defined $hash) {
6757                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6758                         or die_error(404, "Error looking up file");
6759         } else {
6760                 $ftype = git_get_type($hash);
6761                 if ($ftype !~ "blob") {
6762                         die_error(400, "Object is not a blob");
6763                 }
6764         }
6765
6766         my $fd;
6767         if ($format eq 'incremental') {
6768                 # get file contents (as base)
6769                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6770                         or die_error(500, "Open git-cat-file failed");
6771         } elsif ($format eq 'data') {
6772                 # run git-blame --incremental
6773                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6774                         $hash_base, "--", $file_name
6775                         or die_error(500, "Open git-blame --incremental failed");
6776         } else {
6777                 # run git-blame --porcelain
6778                 open $fd, "-|", git_cmd(), "blame", '-p',
6779                         $hash_base, '--', $file_name
6780                         or die_error(500, "Open git-blame --porcelain failed");
6781         }
6782         binmode $fd, ':utf8';
6783
6784         # incremental blame data returns early
6785         if ($format eq 'data') {
6786                 print $cgi->header(
6787                         -type=>"text/plain", -charset => "utf-8",
6788                         -status=> "200 OK");
6789                 local $| = 1; # output autoflush
6790                 while (my $line = <$fd>) {
6791                         print to_utf8($line);
6792                 }
6793                 close $fd
6794                         or print "ERROR $!\n";
6795
6796                 print 'END';
6797                 if (defined $t0 && gitweb_check_feature('timed')) {
6798                         print ' '.
6799                               tv_interval($t0, [ gettimeofday() ]).
6800                               ' '.$number_of_git_cmds;
6801                 }
6802                 print "\n";
6803
6804                 return;
6805         }
6806
6807         # page header
6808         git_header_html();
6809         my $formats_nav =
6810                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6811                         "blob") .
6812                 " | ";
6813         if ($format eq 'incremental') {
6814                 $formats_nav .=
6815                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6816                                 "blame") . " (non-incremental)";
6817         } else {
6818                 $formats_nav .=
6819                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6820                                 "blame") . " (incremental)";
6821         }
6822         $formats_nav .=
6823                 " | " .
6824                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6825                         "history") .
6826                 " | " .
6827                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6828                         "HEAD");
6829         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6830         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6831         git_print_page_path($file_name, $ftype, $hash_base);
6832
6833         # page body
6834         if ($format eq 'incremental') {
6835                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6836                       "This page requires JavaScript to run.\n Use ".
6837                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6838                               'this page').
6839                       " instead.\n".
6840                       "</b></center></div>\n</noscript>\n";
6841
6842                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6843         }
6844
6845         print qq!<div class="page_body">\n!;
6846         print qq!<div id="progress_info">... / ...</div>\n!
6847                 if ($format eq 'incremental');
6848         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6849               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6850               qq!<thead>\n!.
6851               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6852               qq!</thead>\n!.
6853               qq!<tbody>\n!;
6854
6855         my @rev_color = qw(light dark);
6856         my $num_colors = scalar(@rev_color);
6857         my $current_color = 0;
6858
6859         if ($format eq 'incremental') {
6860                 my $color_class = $rev_color[$current_color];
6861
6862                 #contents of a file
6863                 my $linenr = 0;
6864         LINE:
6865                 while (my $line = <$fd>) {
6866                         chomp $line;
6867                         $linenr++;
6868
6869                         print qq!<tr id="l$linenr" class="$color_class">!.
6870                               qq!<td class="sha1"><a href=""> </a></td>!.
6871                               qq!<td class="linenr">!.
6872                               qq!<a class="linenr" href="">$linenr</a></td>!;
6873                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6874                         print qq!</tr>\n!;
6875                 }
6876
6877         } else { # porcelain, i.e. ordinary blame
6878                 my %metainfo = (); # saves information about commits
6879
6880                 # blame data
6881         LINE:
6882                 while (my $line = <$fd>) {
6883                         chomp $line;
6884                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6885                         # no <lines in group> for subsequent lines in group of lines
6886                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6887                            ($line =~ /^($oid_regex) (\d+) (\d+)(?: (\d+))?$/);
6888                         if (!exists $metainfo{$full_rev}) {
6889                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6890                         }
6891                         my $meta = $metainfo{$full_rev};
6892                         my $data;
6893                         while ($data = <$fd>) {
6894                                 chomp $data;
6895                                 last if ($data =~ s/^\t//); # contents of line
6896                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6897                                         $meta->{$1} = $2 unless exists $meta->{$1};
6898                                 }
6899                                 if ($data =~ /^previous /) {
6900                                         $meta->{'nprevious'}++;
6901                                 }
6902                         }
6903                         my $short_rev = substr($full_rev, 0, 8);
6904                         my $author = $meta->{'author'};
6905                         my %date =
6906                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6907                         my $date = $date{'iso-tz'};
6908                         if ($group_size) {
6909                                 $current_color = ($current_color + 1) % $num_colors;
6910                         }
6911                         my $tr_class = $rev_color[$current_color];
6912                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6913                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6914                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6915                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6916                         if ($group_size) {
6917                                 print "<td class=\"sha1\"";
6918                                 print " title=\"". esc_html($author) . ", $date\"";
6919                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6920                                 print ">";
6921                                 print $cgi->a({-href => href(action=>"commit",
6922                                                              hash=>$full_rev,
6923                                                              file_name=>$file_name)},
6924                                               esc_html($short_rev));
6925                                 if ($group_size >= 2) {
6926                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6927                                         if (@author_initials) {
6928                                                 print "<br />" .
6929                                                       esc_html(join('', @author_initials));
6930                                                 #           or join('.', ...)
6931                                         }
6932                                 }
6933                                 print "</td>\n";
6934                         }
6935                         # 'previous' <sha1 of parent commit> <filename at commit>
6936                         if (exists $meta->{'previous'} &&
6937                             $meta->{'previous'} =~ /^($oid_regex) (.*)$/) {
6938                                 $meta->{'parent'} = $1;
6939                                 $meta->{'file_parent'} = unquote($2);
6940                         }
6941                         my $linenr_commit =
6942                                 exists($meta->{'parent'}) ?
6943                                 $meta->{'parent'} : $full_rev;
6944                         my $linenr_filename =
6945                                 exists($meta->{'file_parent'}) ?
6946                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6947                         my $blamed = href(action => 'blame',
6948                                           file_name => $linenr_filename,
6949                                           hash_base => $linenr_commit);
6950                         print "<td class=\"linenr\">";
6951                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6952                                         -class => "linenr" },
6953                                       esc_html($lineno));
6954                         print "</td>";
6955                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6956                         print "</tr>\n";
6957                 } # end while
6958
6959         }
6960
6961         # footer
6962         print "</tbody>\n".
6963               "</table>\n"; # class="blame"
6964         print "</div>\n";   # class="blame_body"
6965         close $fd
6966                 or print "Reading blob failed\n";
6967
6968         git_footer_html();
6969 }
6970
6971 sub git_blame {
6972         git_blame_common();
6973 }
6974
6975 sub git_blame_incremental {
6976         git_blame_common('incremental');
6977 }
6978
6979 sub git_blame_data {
6980         git_blame_common('data');
6981 }
6982
6983 sub git_tags {
6984         my $head = git_get_head_hash($project);
6985         git_header_html();
6986         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6987         git_print_header_div('summary', $project);
6988
6989         my @tagslist = git_get_tags_list();
6990         if (@tagslist) {
6991                 git_tags_body(\@tagslist);
6992         }
6993         git_footer_html();
6994 }
6995
6996 sub git_heads {
6997         my $head = git_get_head_hash($project);
6998         git_header_html();
6999         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
7000         git_print_header_div('summary', $project);
7001
7002         my @headslist = git_get_heads_list();
7003         if (@headslist) {
7004                 git_heads_body(\@headslist, $head);
7005         }
7006         git_footer_html();
7007 }
7008
7009 # used both for single remote view and for list of all the remotes
7010 sub git_remotes {
7011         gitweb_check_feature('remote_heads')
7012                 or die_error(403, "Remote heads view is disabled");
7013
7014         my $head = git_get_head_hash($project);
7015         my $remote = $input_params{'hash'};
7016
7017         my $remotedata = git_get_remotes_list($remote);
7018         die_error(500, "Unable to get remote information") unless defined $remotedata;
7019
7020         unless (%$remotedata) {
7021                 die_error(404, defined $remote ?
7022                         "Remote $remote not found" :
7023                         "No remotes found");
7024         }
7025
7026         git_header_html(undef, undef, -action_extra => $remote);
7027         git_print_page_nav('', '',  $head, undef, $head,
7028                 format_ref_views($remote ? '' : 'remotes'));
7029
7030         fill_remote_heads($remotedata);
7031         if (defined $remote) {
7032                 git_print_header_div('remotes', "$remote remote for $project");
7033                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
7034         } else {
7035                 git_print_header_div('summary', "$project remotes");
7036                 git_remotes_body($remotedata, undef, $head);
7037         }
7038
7039         git_footer_html();
7040 }
7041
7042 sub git_blob_plain {
7043         my $type = shift;
7044         my $expires;
7045
7046         if (!defined $hash) {
7047                 if (defined $file_name) {
7048                         my $base = $hash_base || git_get_head_hash($project);
7049                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7050                                 or die_error(404, "Cannot find file");
7051                 } else {
7052                         die_error(400, "No file name defined");
7053                 }
7054         } elsif ($hash =~ m/^$oid_regex$/) {
7055                 # blobs defined by non-textual hash id's can be cached
7056                 $expires = "+1d";
7057         }
7058
7059         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7060                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7061
7062         # content-type (can include charset)
7063         $type = blob_contenttype($fd, $file_name, $type);
7064
7065         # "save as" filename, even when no $file_name is given
7066         my $save_as = "$hash";
7067         if (defined $file_name) {
7068                 $save_as = $file_name;
7069         } elsif ($type =~ m/^text\//) {
7070                 $save_as .= '.txt';
7071         }
7072
7073         # With XSS prevention on, blobs of all types except a few known safe
7074         # ones are served with "Content-Disposition: attachment" to make sure
7075         # they don't run in our security domain.  For certain image types,
7076         # blob view writes an <img> tag referring to blob_plain view, and we
7077         # want to be sure not to break that by serving the image as an
7078         # attachment (though Firefox 3 doesn't seem to care).
7079         my $sandbox = $prevent_xss &&
7080                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7081
7082         # serve text/* as text/plain
7083         if ($prevent_xss &&
7084             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7085              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7086                 my $rest = $1;
7087                 $rest = defined $rest ? $rest : '';
7088                 $type = "text/plain$rest";
7089         }
7090
7091         print $cgi->header(
7092                 -type => $type,
7093                 -expires => $expires,
7094                 -content_disposition =>
7095                         ($sandbox ? 'attachment' : 'inline')
7096                         . '; filename="' . $save_as . '"');
7097         local $/ = undef;
7098         local *FCGI::Stream::PRINT = $FCGI_Stream_PRINT_raw;
7099         binmode STDOUT, ':raw';
7100         print <$fd>;
7101         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7102         close $fd;
7103 }
7104
7105 sub git_blob {
7106         my $expires;
7107
7108         if (!defined $hash) {
7109                 if (defined $file_name) {
7110                         my $base = $hash_base || git_get_head_hash($project);
7111                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7112                                 or die_error(404, "Cannot find file");
7113                 } else {
7114                         die_error(400, "No file name defined");
7115                 }
7116         } elsif ($hash =~ m/^$oid_regex$/) {
7117                 # blobs defined by non-textual hash id's can be cached
7118                 $expires = "+1d";
7119         }
7120
7121         my $have_blame = gitweb_check_feature('blame');
7122         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7123                 or die_error(500, "Couldn't cat $file_name, $hash");
7124         my $mimetype = blob_mimetype($fd, $file_name);
7125         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7126         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7127                 close $fd;
7128                 return git_blob_plain($mimetype);
7129         }
7130         # we can have blame only for text/* mimetype
7131         $have_blame &&= ($mimetype =~ m!^text/!);
7132
7133         my $highlight = gitweb_check_feature('highlight');
7134         my $syntax = guess_file_syntax($highlight, $file_name);
7135         $fd = run_highlighter($fd, $highlight, $syntax);
7136
7137         git_header_html(undef, $expires);
7138         my $formats_nav = '';
7139         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7140                 if (defined $file_name) {
7141                         if ($have_blame) {
7142                                 $formats_nav .=
7143                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7144                                                 "blame") .
7145                                         " | ";
7146                         }
7147                         $formats_nav .=
7148                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7149                                         "history") .
7150                                 " | " .
7151                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7152                                         "raw") .
7153                                 " | " .
7154                                 $cgi->a({-href => href(action=>"blob",
7155                                                        hash_base=>"HEAD", file_name=>$file_name)},
7156                                         "HEAD");
7157                 } else {
7158                         $formats_nav .=
7159                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7160                                         "raw");
7161                 }
7162                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7163                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7164         } else {
7165                 print "<div class=\"page_nav\">\n" .
7166                       "<br/><br/></div>\n" .
7167                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7168         }
7169         git_print_page_path($file_name, "blob", $hash_base);
7170         print "<div class=\"page_body\">\n";
7171         if ($mimetype =~ m!^image/!) {
7172                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7173                 if ($file_name) {
7174                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7175                 }
7176                 print qq! src="! .
7177                       esc_attr(href(action=>"blob_plain", hash=>$hash,
7178                            hash_base=>$hash_base, file_name=>$file_name)) .
7179                       qq!" />\n!;
7180         } else {
7181                 my $nr;
7182                 while (my $line = <$fd>) {
7183                         chomp $line;
7184                         $nr++;
7185                         $line = untabify($line);
7186                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7187                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7188                                $highlight ? sanitize($line) : esc_html($line, -nbsp=>1);
7189                 }
7190         }
7191         close $fd
7192                 or print "Reading blob failed.\n";
7193         print "</div>";
7194         git_footer_html();
7195 }
7196
7197 sub git_tree {
7198         if (!defined $hash_base) {
7199                 $hash_base = "HEAD";
7200         }
7201         if (!defined $hash) {
7202                 if (defined $file_name) {
7203                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7204                 } else {
7205                         $hash = $hash_base;
7206                 }
7207         }
7208         die_error(404, "No such tree") unless defined($hash);
7209
7210         my $show_sizes = gitweb_check_feature('show-sizes');
7211         my $have_blame = gitweb_check_feature('blame');
7212
7213         my @entries = ();
7214         {
7215                 local $/ = "\0";
7216                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7217                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7218                         or die_error(500, "Open git-ls-tree failed");
7219                 @entries = map { chomp; $_ } <$fd>;
7220                 close $fd
7221                         or die_error(404, "Reading tree failed");
7222         }
7223
7224         my $refs = git_get_references();
7225         my $ref = format_ref_marker($refs, $hash_base);
7226         git_header_html();
7227         my $basedir = '';
7228         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7229                 my @views_nav = ();
7230                 if (defined $file_name) {
7231                         push @views_nav,
7232                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7233                                         "history"),
7234                                 $cgi->a({-href => href(action=>"tree",
7235                                                        hash_base=>"HEAD", file_name=>$file_name)},
7236                                         "HEAD"),
7237                 }
7238                 my $snapshot_links = format_snapshot_links($hash);
7239                 if (defined $snapshot_links) {
7240                         # FIXME: Should be available when we have no hash base as well.
7241                         push @views_nav, $snapshot_links;
7242                 }
7243                 git_print_page_nav('tree','', $hash_base, undef, undef,
7244                                    join(' | ', @views_nav));
7245                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7246         } else {
7247                 undef $hash_base;
7248                 print "<div class=\"page_nav\">\n";
7249                 print "<br/><br/></div>\n";
7250                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7251         }
7252         if (defined $file_name) {
7253                 $basedir = $file_name;
7254                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7255                         $basedir .= '/';
7256                 }
7257                 git_print_page_path($file_name, 'tree', $hash_base);
7258         }
7259         print "<div class=\"page_body\">\n";
7260         print "<table class=\"tree\">\n";
7261         my $alternate = 1;
7262         # '..' (top directory) link if possible
7263         if (defined $hash_base &&
7264             defined $file_name && $file_name =~ m![^/]+$!) {
7265                 if ($alternate) {
7266                         print "<tr class=\"dark\">\n";
7267                 } else {
7268                         print "<tr class=\"light\">\n";
7269                 }
7270                 $alternate ^= 1;
7271
7272                 my $up = $file_name;
7273                 $up =~ s!/?[^/]+$!!;
7274                 undef $up unless $up;
7275                 # based on git_print_tree_entry
7276                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7277                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7278                 print '<td class="list">';
7279                 print $cgi->a({-href => href(action=>"tree",
7280                                              hash_base=>$hash_base,
7281                                              file_name=>$up)},
7282                               "..");
7283                 print "</td>\n";
7284                 print "<td class=\"link\"></td>\n";
7285
7286                 print "</tr>\n";
7287         }
7288         foreach my $line (@entries) {
7289                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7290
7291                 if ($alternate) {
7292                         print "<tr class=\"dark\">\n";
7293                 } else {
7294                         print "<tr class=\"light\">\n";
7295                 }
7296                 $alternate ^= 1;
7297
7298                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7299
7300                 print "</tr>\n";
7301         }
7302         print "</table>\n" .
7303               "</div>";
7304         git_footer_html();
7305 }
7306
7307 sub sanitize_for_filename {
7308     my $name = shift;
7309
7310     $name =~ s!/!-!g;
7311     $name =~ s/[^[:alnum:]_.-]//g;
7312
7313     return $name;
7314 }
7315
7316 sub snapshot_name {
7317         my ($project, $hash) = @_;
7318
7319         # path/to/project.git  -> project
7320         # path/to/project/.git -> project
7321         my $name = to_utf8($project);
7322         $name =~ s,([^/])/*\.git$,$1,;
7323         $name = sanitize_for_filename(basename($name));
7324
7325         my $ver = $hash;
7326         if ($hash =~ /^[0-9a-fA-F]+$/) {
7327                 # shorten SHA-1 hash
7328                 my $full_hash = git_get_full_hash($project, $hash);
7329                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7330                         $ver = git_get_short_hash($project, $hash);
7331                 }
7332         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7333                 # tags don't need shortened SHA-1 hash
7334                 $ver = $1;
7335         } else {
7336                 # branches and other need shortened SHA-1 hash
7337                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7338                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7339                         my $ref_dir = (defined $1) ? $1 : '';
7340                         $ver = $2;
7341
7342                         $ref_dir = sanitize_for_filename($ref_dir);
7343                         # for refs neither in heads nor remotes we want to
7344                         # add a ref dir to archive name
7345                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7346                                 $ver = $ref_dir . '-' . $ver;
7347                         }
7348                 }
7349                 $ver .= '-' . git_get_short_hash($project, $hash);
7350         }
7351         # special case of sanitization for filename - we change
7352         # slashes to dots instead of dashes
7353         # in case of hierarchical branch names
7354         $ver =~ s!/!.!g;
7355         $ver =~ s/[^[:alnum:]_.-]//g;
7356
7357         # name = project-version_string
7358         $name = "$name-$ver";
7359
7360         return wantarray ? ($name, $name) : $name;
7361 }
7362
7363 sub exit_if_unmodified_since {
7364         my ($latest_epoch) = @_;
7365         our $cgi;
7366
7367         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7368         if (defined $if_modified) {
7369                 my $since;
7370                 if (eval { require HTTP::Date; 1; }) {
7371                         $since = HTTP::Date::str2time($if_modified);
7372                 } elsif (eval { require Time::ParseDate; 1; }) {
7373                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7374                 }
7375                 if (defined $since && $latest_epoch <= $since) {
7376                         my %latest_date = parse_date($latest_epoch);
7377                         print $cgi->header(
7378                                 -last_modified => $latest_date{'rfc2822'},
7379                                 -status => '304 Not Modified');
7380                         goto DONE_GITWEB;
7381                 }
7382         }
7383 }
7384
7385 sub git_snapshot {
7386         my $format = $input_params{'snapshot_format'};
7387         if (!@snapshot_fmts) {
7388                 die_error(403, "Snapshots not allowed");
7389         }
7390         # default to first supported snapshot format
7391         $format ||= $snapshot_fmts[0];
7392         if ($format !~ m/^[a-z0-9]+$/) {
7393                 die_error(400, "Invalid snapshot format parameter");
7394         } elsif (!exists($known_snapshot_formats{$format})) {
7395                 die_error(400, "Unknown snapshot format");
7396         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7397                 die_error(403, "Snapshot format not allowed");
7398         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7399                 die_error(403, "Unsupported snapshot format");
7400         }
7401
7402         my $type = git_get_type("$hash^{}");
7403         if (!$type) {
7404                 die_error(404, 'Object does not exist');
7405         }  elsif ($type eq 'blob') {
7406                 die_error(400, 'Object is not a tree-ish');
7407         }
7408
7409         my ($name, $prefix) = snapshot_name($project, $hash);
7410         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7411
7412         my %co = parse_commit($hash);
7413         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7414
7415         my $cmd = quote_command(
7416                 git_cmd(), 'archive',
7417                 "--format=$known_snapshot_formats{$format}{'format'}",
7418                 "--prefix=$prefix/", $hash);
7419         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7420                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7421         }
7422
7423         $filename =~ s/(["\\])/\\$1/g;
7424         my %latest_date;
7425         if (%co) {
7426                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7427         }
7428
7429         print $cgi->header(
7430                 -type => $known_snapshot_formats{$format}{'type'},
7431                 -content_disposition => 'inline; filename="' . $filename . '"',
7432                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7433                 -status => '200 OK');
7434
7435         open my $fd, "-|", $cmd
7436                 or die_error(500, "Execute git-archive failed");
7437         local *FCGI::Stream::PRINT = $FCGI_Stream_PRINT_raw;
7438         binmode STDOUT, ':raw';
7439         print <$fd>;
7440         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7441         close $fd;
7442 }
7443
7444 sub git_log_generic {
7445         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7446
7447         my $head = git_get_head_hash($project);
7448         if (!defined $base) {
7449                 $base = $head;
7450         }
7451         if (!defined $page) {
7452                 $page = 0;
7453         }
7454         my $refs = git_get_references();
7455
7456         my $commit_hash = $base;
7457         if (defined $parent) {
7458                 $commit_hash = "$parent..$base";
7459         }
7460         my @commitlist =
7461                 parse_commits($commit_hash, 101, (100 * $page),
7462                               defined $file_name ? ($file_name, "--full-history") : ());
7463
7464         my $ftype;
7465         if (!defined $file_hash && defined $file_name) {
7466                 # some commits could have deleted file in question,
7467                 # and not have it in tree, but one of them has to have it
7468                 for (my $i = 0; $i < @commitlist; $i++) {
7469                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7470                         last if defined $file_hash;
7471                 }
7472         }
7473         if (defined $file_hash) {
7474                 $ftype = git_get_type($file_hash);
7475         }
7476         if (defined $file_name && !defined $ftype) {
7477                 die_error(500, "Unknown type of object");
7478         }
7479         my %co;
7480         if (defined $file_name) {
7481                 %co = parse_commit($base)
7482                         or die_error(404, "Unknown commit object");
7483         }
7484
7485
7486         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7487         my $next_link = '';
7488         if ($#commitlist >= 100) {
7489                 $next_link =
7490                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7491                                  -accesskey => "n", -title => "Alt-n"}, "next");
7492         }
7493         my $patch_max = gitweb_get_feature('patches');
7494         if ($patch_max && !defined $file_name &&
7495                 !gitweb_check_feature('email-privacy')) {
7496                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7497                         $paging_nav .= " &sdot; " .
7498                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7499                                         "patches");
7500                 }
7501         }
7502
7503         git_header_html();
7504         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7505         if (defined $file_name) {
7506                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7507         } else {
7508                 git_print_header_div('summary', $project)
7509         }
7510         git_print_page_path($file_name, $ftype, $hash_base)
7511                 if (defined $file_name);
7512
7513         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7514                      $file_name, $file_hash, $ftype);
7515
7516         git_footer_html();
7517 }
7518
7519 sub git_log {
7520         git_log_generic('log', \&git_log_body,
7521                         $hash, $hash_parent);
7522 }
7523
7524 sub git_commit {
7525         $hash ||= $hash_base || "HEAD";
7526         my %co = parse_commit($hash)
7527             or die_error(404, "Unknown commit object");
7528
7529         my $parent  = $co{'parent'};
7530         my $parents = $co{'parents'}; # listref
7531
7532         # we need to prepare $formats_nav before any parameter munging
7533         my $formats_nav;
7534         if (!defined $parent) {
7535                 # --root commitdiff
7536                 $formats_nav .= '(initial)';
7537         } elsif (@$parents == 1) {
7538                 # single parent commit
7539                 $formats_nav .=
7540                         '(parent: ' .
7541                         $cgi->a({-href => href(action=>"commit",
7542                                                hash=>$parent)},
7543                                 esc_html(substr($parent, 0, 7))) .
7544                         ')';
7545         } else {
7546                 # merge commit
7547                 $formats_nav .=
7548                         '(merge: ' .
7549                         join(' ', map {
7550                                 $cgi->a({-href => href(action=>"commit",
7551                                                        hash=>$_)},
7552                                         esc_html(substr($_, 0, 7)));
7553                         } @$parents ) .
7554                         ')';
7555         }
7556         if (gitweb_check_feature('patches') && @$parents <= 1 &&
7557                 !gitweb_check_feature('email-privacy')) {
7558                 $formats_nav .= " | " .
7559                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7560                                 "patch");
7561         }
7562
7563         if (!defined $parent) {
7564                 $parent = "--root";
7565         }
7566         my @difftree;
7567         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7568                 @diff_opts,
7569                 (@$parents <= 1 ? $parent : '-c'),
7570                 $hash, "--"
7571                 or die_error(500, "Open git-diff-tree failed");
7572         @difftree = map { chomp; $_ } <$fd>;
7573         close $fd or die_error(404, "Reading git-diff-tree failed");
7574
7575         # non-textual hash id's can be cached
7576         my $expires;
7577         if ($hash =~ m/^$oid_regex$/) {
7578                 $expires = "+1d";
7579         }
7580         my $refs = git_get_references();
7581         my $ref = format_ref_marker($refs, $co{'id'});
7582
7583         git_header_html(undef, $expires);
7584         git_print_page_nav('commit', '',
7585                            $hash, $co{'tree'}, $hash,
7586                            $formats_nav);
7587
7588         if (defined $co{'parent'}) {
7589                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7590         } else {
7591                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7592         }
7593         print "<div class=\"title_text\">\n" .
7594               "<table class=\"object_header\">\n";
7595         git_print_authorship_rows(\%co);
7596         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7597         print "<tr>" .
7598               "<td>tree</td>" .
7599               "<td class=\"sha1\">" .
7600               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7601                        class => "list"}, $co{'tree'}) .
7602               "</td>" .
7603               "<td class=\"link\">" .
7604               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7605                       "tree");
7606         my $snapshot_links = format_snapshot_links($hash);
7607         if (defined $snapshot_links) {
7608                 print " | " . $snapshot_links;
7609         }
7610         print "</td>" .
7611               "</tr>\n";
7612
7613         foreach my $par (@$parents) {
7614                 print "<tr>" .
7615                       "<td>parent</td>" .
7616                       "<td class=\"sha1\">" .
7617                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7618                                class => "list"}, $par) .
7619                       "</td>" .
7620                       "<td class=\"link\">" .
7621                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7622                       " | " .
7623                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7624                       "</td>" .
7625                       "</tr>\n";
7626         }
7627         print "</table>".
7628               "</div>\n";
7629
7630         print "<div class=\"page_body\">\n";
7631         git_print_log($co{'comment'});
7632         print "</div>\n";
7633
7634         git_difftree_body(\@difftree, $hash, @$parents);
7635
7636         git_footer_html();
7637 }
7638
7639 sub git_object {
7640         # object is defined by:
7641         # - hash or hash_base alone
7642         # - hash_base and file_name
7643         my $type;
7644
7645         # - hash or hash_base alone
7646         if ($hash || ($hash_base && !defined $file_name)) {
7647                 my $object_id = $hash || $hash_base;
7648
7649                 open my $fd, "-|", quote_command(
7650                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7651                         or die_error(404, "Object does not exist");
7652                 $type = <$fd>;
7653                 defined $type && chomp $type;
7654                 close $fd
7655                         or die_error(404, "Object does not exist");
7656
7657         # - hash_base and file_name
7658         } elsif ($hash_base && defined $file_name) {
7659                 $file_name =~ s,/+$,,;
7660
7661                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7662                         or die_error(404, "Base object does not exist");
7663
7664                 # here errors should not happen
7665                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7666                         or die_error(500, "Open git-ls-tree failed");
7667                 my $line = <$fd>;
7668                 close $fd;
7669
7670                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7671                 unless ($line && $line =~ m/^([0-9]+) (.+) ($oid_regex)\t/) {
7672                         die_error(404, "File or directory for given base does not exist");
7673                 }
7674                 $type = $2;
7675                 $hash = $3;
7676         } else {
7677                 die_error(400, "Not enough information to find object");
7678         }
7679
7680         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7681                                           hash=>$hash, hash_base=>$hash_base,
7682                                           file_name=>$file_name),
7683                              -status => '302 Found');
7684 }
7685
7686 sub git_blobdiff {
7687         my $format = shift || 'html';
7688         my $diff_style = $input_params{'diff_style'} || 'inline';
7689
7690         my $fd;
7691         my @difftree;
7692         my %diffinfo;
7693         my $expires;
7694
7695         # preparing $fd and %diffinfo for git_patchset_body
7696         # new style URI
7697         if (defined $hash_base && defined $hash_parent_base) {
7698                 if (defined $file_name) {
7699                         # read raw output
7700                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7701                                 $hash_parent_base, $hash_base,
7702                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7703                                 or die_error(500, "Open git-diff-tree failed");
7704                         @difftree = map { chomp; $_ } <$fd>;
7705                         close $fd
7706                                 or die_error(404, "Reading git-diff-tree failed");
7707                         @difftree
7708                                 or die_error(404, "Blob diff not found");
7709
7710                 } elsif (defined $hash &&
7711                          $hash =~ $oid_regex) {
7712                         # try to find filename from $hash
7713
7714                         # read filtered raw output
7715                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7716                                 $hash_parent_base, $hash_base, "--"
7717                                 or die_error(500, "Open git-diff-tree failed");
7718                         @difftree =
7719                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7720                                 # $hash == to_id
7721                                 grep { /^:[0-7]{6} [0-7]{6} $oid_regex $hash/ }
7722                                 map { chomp; $_ } <$fd>;
7723                         close $fd
7724                                 or die_error(404, "Reading git-diff-tree failed");
7725                         @difftree
7726                                 or die_error(404, "Blob diff not found");
7727
7728                 } else {
7729                         die_error(400, "Missing one of the blob diff parameters");
7730                 }
7731
7732                 if (@difftree > 1) {
7733                         die_error(400, "Ambiguous blob diff specification");
7734                 }
7735
7736                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7737                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7738                 $file_name   ||= $diffinfo{'to_file'};
7739
7740                 $hash_parent ||= $diffinfo{'from_id'};
7741                 $hash        ||= $diffinfo{'to_id'};
7742
7743                 # non-textual hash id's can be cached
7744                 if ($hash_base =~ m/^$oid_regex$/ &&
7745                     $hash_parent_base =~ m/^$oid_regex$/) {
7746                         $expires = '+1d';
7747                 }
7748
7749                 # open patch output
7750                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7751                         '-p', ($format eq 'html' ? "--full-index" : ()),
7752                         $hash_parent_base, $hash_base,
7753                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7754                         or die_error(500, "Open git-diff-tree failed");
7755         }
7756
7757         # old/legacy style URI -- not generated anymore since 1.4.3.
7758         if (!%diffinfo) {
7759                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7760         }
7761
7762         # header
7763         if ($format eq 'html') {
7764                 my $formats_nav =
7765                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7766                                 "raw");
7767                 $formats_nav .= diff_style_nav($diff_style);
7768                 git_header_html(undef, $expires);
7769                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7770                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7771                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7772                 } else {
7773                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7774                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7775                 }
7776                 if (defined $file_name) {
7777                         git_print_page_path($file_name, "blob", $hash_base);
7778                 } else {
7779                         print "<div class=\"page_path\"></div>\n";
7780                 }
7781
7782         } elsif ($format eq 'plain') {
7783                 print $cgi->header(
7784                         -type => 'text/plain',
7785                         -charset => 'utf-8',
7786                         -expires => $expires,
7787                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7788
7789                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7790
7791         } else {
7792                 die_error(400, "Unknown blobdiff format");
7793         }
7794
7795         # patch
7796         if ($format eq 'html') {
7797                 print "<div class=\"page_body\">\n";
7798
7799                 git_patchset_body($fd, $diff_style,
7800                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7801                 close $fd;
7802
7803                 print "</div>\n"; # class="page_body"
7804                 git_footer_html();
7805
7806         } else {
7807                 while (my $line = <$fd>) {
7808                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7809                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7810
7811                         print $line;
7812
7813                         last if $line =~ m!^\+\+\+!;
7814                 }
7815                 local $/ = undef;
7816                 print <$fd>;
7817                 close $fd;
7818         }
7819 }
7820
7821 sub git_blobdiff_plain {
7822         git_blobdiff('plain');
7823 }
7824
7825 # assumes that it is added as later part of already existing navigation,
7826 # so it returns "| foo | bar" rather than just "foo | bar"
7827 sub diff_style_nav {
7828         my ($diff_style, $is_combined) = @_;
7829         $diff_style ||= 'inline';
7830
7831         return "" if ($is_combined);
7832
7833         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7834         my %styles = @styles;
7835         @styles =
7836                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7837
7838         return join '',
7839                 map { " | ".$_ }
7840                 map {
7841                         $_ eq $diff_style ? $styles{$_} :
7842                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7843                 } @styles;
7844 }
7845
7846 sub git_commitdiff {
7847         my %params = @_;
7848         my $format = $params{-format} || 'html';
7849         my $diff_style = $input_params{'diff_style'} || 'inline';
7850
7851         my ($patch_max) = gitweb_get_feature('patches');
7852         if ($format eq 'patch') {
7853                 die_error(403, "Patch view not allowed") unless $patch_max;
7854         }
7855
7856         $hash ||= $hash_base || "HEAD";
7857         my %co = parse_commit($hash)
7858             or die_error(404, "Unknown commit object");
7859
7860         # choose format for commitdiff for merge
7861         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7862                 $hash_parent = '--cc';
7863         }
7864         # we need to prepare $formats_nav before almost any parameter munging
7865         my $formats_nav;
7866         if ($format eq 'html') {
7867                 $formats_nav =
7868                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7869                                 "raw");
7870                 if ($patch_max && @{$co{'parents'}} <= 1 &&
7871                         !gitweb_check_feature('email-privacy')) {
7872                         $formats_nav .= " | " .
7873                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7874                                         "patch");
7875                 }
7876                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7877
7878                 if (defined $hash_parent &&
7879                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7880                         # commitdiff with two commits given
7881                         my $hash_parent_short = $hash_parent;
7882                         if ($hash_parent =~ m/^$oid_regex$/) {
7883                                 $hash_parent_short = substr($hash_parent, 0, 7);
7884                         }
7885                         $formats_nav .=
7886                                 ' (from';
7887                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7888                                 if ($co{'parents'}[$i] eq $hash_parent) {
7889                                         $formats_nav .= ' parent ' . ($i+1);
7890                                         last;
7891                                 }
7892                         }
7893                         $formats_nav .= ': ' .
7894                                 $cgi->a({-href => href(-replay=>1,
7895                                                        hash=>$hash_parent, hash_base=>undef)},
7896                                         esc_html($hash_parent_short)) .
7897                                 ')';
7898                 } elsif (!$co{'parent'}) {
7899                         # --root commitdiff
7900                         $formats_nav .= ' (initial)';
7901                 } elsif (scalar @{$co{'parents'}} == 1) {
7902                         # single parent commit
7903                         $formats_nav .=
7904                                 ' (parent: ' .
7905                                 $cgi->a({-href => href(-replay=>1,
7906                                                        hash=>$co{'parent'}, hash_base=>undef)},
7907                                         esc_html(substr($co{'parent'}, 0, 7))) .
7908                                 ')';
7909                 } else {
7910                         # merge commit
7911                         if ($hash_parent eq '--cc') {
7912                                 $formats_nav .= ' | ' .
7913                                         $cgi->a({-href => href(-replay=>1,
7914                                                                hash=>$hash, hash_parent=>'-c')},
7915                                                 'combined');
7916                         } else { # $hash_parent eq '-c'
7917                                 $formats_nav .= ' | ' .
7918                                         $cgi->a({-href => href(-replay=>1,
7919                                                                hash=>$hash, hash_parent=>'--cc')},
7920                                                 'compact');
7921                         }
7922                         $formats_nav .=
7923                                 ' (merge: ' .
7924                                 join(' ', map {
7925                                         $cgi->a({-href => href(-replay=>1,
7926                                                                hash=>$_, hash_base=>undef)},
7927                                                 esc_html(substr($_, 0, 7)));
7928                                 } @{$co{'parents'}} ) .
7929                                 ')';
7930                 }
7931         }
7932
7933         my $hash_parent_param = $hash_parent;
7934         if (!defined $hash_parent_param) {
7935                 # --cc for multiple parents, --root for parentless
7936                 $hash_parent_param =
7937                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7938         }
7939
7940         # read commitdiff
7941         my $fd;
7942         my @difftree;
7943         if ($format eq 'html') {
7944                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7945                         "--no-commit-id", "--patch-with-raw", "--full-index",
7946                         $hash_parent_param, $hash, "--"
7947                         or die_error(500, "Open git-diff-tree failed");
7948
7949                 while (my $line = <$fd>) {
7950                         chomp $line;
7951                         # empty line ends raw part of diff-tree output
7952                         last unless $line;
7953                         push @difftree, scalar parse_difftree_raw_line($line);
7954                 }
7955
7956         } elsif ($format eq 'plain') {
7957                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7958                         '-p', $hash_parent_param, $hash, "--"
7959                         or die_error(500, "Open git-diff-tree failed");
7960         } elsif ($format eq 'patch') {
7961                 # For commit ranges, we limit the output to the number of
7962                 # patches specified in the 'patches' feature.
7963                 # For single commits, we limit the output to a single patch,
7964                 # diverging from the git-format-patch default.
7965                 my @commit_spec = ();
7966                 if ($hash_parent) {
7967                         if ($patch_max > 0) {
7968                                 push @commit_spec, "-$patch_max";
7969                         }
7970                         push @commit_spec, '-n', "$hash_parent..$hash";
7971                 } else {
7972                         if ($params{-single}) {
7973                                 push @commit_spec, '-1';
7974                         } else {
7975                                 if ($patch_max > 0) {
7976                                         push @commit_spec, "-$patch_max";
7977                                 }
7978                                 push @commit_spec, "-n";
7979                         }
7980                         push @commit_spec, '--root', $hash;
7981                 }
7982                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7983                         '--encoding=utf8', '--stdout', @commit_spec
7984                         or die_error(500, "Open git-format-patch failed");
7985         } else {
7986                 die_error(400, "Unknown commitdiff format");
7987         }
7988
7989         # non-textual hash id's can be cached
7990         my $expires;
7991         if ($hash =~ m/^$oid_regex$/) {
7992                 $expires = "+1d";
7993         }
7994
7995         # write commit message
7996         if ($format eq 'html') {
7997                 my $refs = git_get_references();
7998                 my $ref = format_ref_marker($refs, $co{'id'});
7999
8000                 git_header_html(undef, $expires);
8001                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
8002                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
8003                 print "<div class=\"title_text\">\n" .
8004                       "<table class=\"object_header\">\n";
8005                 git_print_authorship_rows(\%co);
8006                 print "</table>".
8007                       "</div>\n";
8008                 print "<div class=\"page_body\">\n";
8009                 if (@{$co{'comment'}} > 1) {
8010                         print "<div class=\"log\">\n";
8011                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
8012                         print "</div>\n"; # class="log"
8013                 }
8014
8015         } elsif ($format eq 'plain') {
8016                 my $refs = git_get_references("tags");
8017                 my $tagname = git_get_rev_name_tags($hash);
8018                 my $filename = basename($project) . "-$hash.patch";
8019
8020                 print $cgi->header(
8021                         -type => 'text/plain',
8022                         -charset => 'utf-8',
8023                         -expires => $expires,
8024                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8025                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
8026                 print "From: " . to_utf8($co{'author'}) . "\n";
8027                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
8028                 print "Subject: " . to_utf8($co{'title'}) . "\n";
8029
8030                 print "X-Git-Tag: $tagname\n" if $tagname;
8031                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
8032
8033                 foreach my $line (@{$co{'comment'}}) {
8034                         print to_utf8($line) . "\n";
8035                 }
8036                 print "---\n\n";
8037         } elsif ($format eq 'patch') {
8038                 my $filename = basename($project) . "-$hash.patch";
8039
8040                 print $cgi->header(
8041                         -type => 'text/plain',
8042                         -charset => 'utf-8',
8043                         -expires => $expires,
8044                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8045         }
8046
8047         # write patch
8048         if ($format eq 'html') {
8049                 my $use_parents = !defined $hash_parent ||
8050                         $hash_parent eq '-c' || $hash_parent eq '--cc';
8051                 git_difftree_body(\@difftree, $hash,
8052                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8053                 print "<br/>\n";
8054
8055                 git_patchset_body($fd, $diff_style,
8056                                   \@difftree, $hash,
8057                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8058                 close $fd;
8059                 print "</div>\n"; # class="page_body"
8060                 git_footer_html();
8061
8062         } elsif ($format eq 'plain') {
8063                 local $/ = undef;
8064                 print <$fd>;
8065                 close $fd
8066                         or print "Reading git-diff-tree failed\n";
8067         } elsif ($format eq 'patch') {
8068                 local $/ = undef;
8069                 print <$fd>;
8070                 close $fd
8071                         or print "Reading git-format-patch failed\n";
8072         }
8073 }
8074
8075 sub git_commitdiff_plain {
8076         git_commitdiff(-format => 'plain');
8077 }
8078
8079 # format-patch-style patches
8080 sub git_patch {
8081         git_commitdiff(-format => 'patch', -single => 1);
8082 }
8083
8084 sub git_patches {
8085         git_commitdiff(-format => 'patch');
8086 }
8087
8088 sub git_history {
8089         git_log_generic('history', \&git_history_body,
8090                         $hash_base, $hash_parent_base,
8091                         $file_name, $hash);
8092 }
8093
8094 sub git_search {
8095         $searchtype ||= 'commit';
8096
8097         # check if appropriate features are enabled
8098         gitweb_check_feature('search')
8099                 or die_error(403, "Search is disabled");
8100         if ($searchtype eq 'pickaxe') {
8101                 # pickaxe may take all resources of your box and run for several minutes
8102                 # with every query - so decide by yourself how public you make this feature
8103                 gitweb_check_feature('pickaxe')
8104                         or die_error(403, "Pickaxe search is disabled");
8105         }
8106         if ($searchtype eq 'grep') {
8107                 # grep search might be potentially CPU-intensive, too
8108                 gitweb_check_feature('grep')
8109                         or die_error(403, "Grep search is disabled");
8110         }
8111
8112         if (!defined $searchtext) {
8113                 die_error(400, "Text field is empty");
8114         }
8115         if (!defined $hash) {
8116                 $hash = git_get_head_hash($project);
8117         }
8118         my %co = parse_commit($hash);
8119         if (!%co) {
8120                 die_error(404, "Unknown commit object");
8121         }
8122         if (!defined $page) {
8123                 $page = 0;
8124         }
8125
8126         if ($searchtype eq 'commit' ||
8127             $searchtype eq 'author' ||
8128             $searchtype eq 'committer') {
8129                 git_search_message(%co);
8130         } elsif ($searchtype eq 'pickaxe') {
8131                 git_search_changes(%co);
8132         } elsif ($searchtype eq 'grep') {
8133                 git_search_files(%co);
8134         } else {
8135                 die_error(400, "Unknown search type");
8136         }
8137 }
8138
8139 sub git_search_help {
8140         git_header_html();
8141         git_print_page_nav('','', $hash,$hash,$hash);
8142         print <<EOT;
8143 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8144 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8145 the pattern entered is recognized as the POSIX extended
8146 <a href="https://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8147 insensitive).</p>
8148 <dl>
8149 <dt><b>commit</b></dt>
8150 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8151 EOT
8152         my $have_grep = gitweb_check_feature('grep');
8153         if ($have_grep) {
8154                 print <<EOT;
8155 <dt><b>grep</b></dt>
8156 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8157     a different one) are searched for the given pattern. On large trees, this search can take
8158 a while and put some strain on the server, so please use it with some consideration. Note that
8159 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8160 case-sensitive.</dd>
8161 EOT
8162         }
8163         print <<EOT;
8164 <dt><b>author</b></dt>
8165 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8166 <dt><b>committer</b></dt>
8167 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8168 EOT
8169         my $have_pickaxe = gitweb_check_feature('pickaxe');
8170         if ($have_pickaxe) {
8171                 print <<EOT;
8172 <dt><b>pickaxe</b></dt>
8173 <dd>All commits that caused the string to appear or disappear from any file (changes that
8174 added, removed or "modified" the string) will be listed. This search can take a while and
8175 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8176 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8177 EOT
8178         }
8179         print "</dl>\n";
8180         git_footer_html();
8181 }
8182
8183 sub git_shortlog {
8184         git_log_generic('shortlog', \&git_shortlog_body,
8185                         $hash, $hash_parent);
8186 }
8187
8188 ## ......................................................................
8189 ## feeds (RSS, Atom; OPML)
8190
8191 sub git_feed {
8192         my $format = shift || 'atom';
8193         my $have_blame = gitweb_check_feature('blame');
8194
8195         # Atom: http://www.atomenabled.org/developers/syndication/
8196         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8197         if ($format ne 'rss' && $format ne 'atom') {
8198                 die_error(400, "Unknown web feed format");
8199         }
8200
8201         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8202         my $head = $hash || 'HEAD';
8203         my @commitlist = parse_commits($head, 150, 0, $file_name);
8204
8205         my %latest_commit;
8206         my %latest_date;
8207         my $content_type = "application/$format+xml";
8208         if (defined $cgi->http('HTTP_ACCEPT') &&
8209                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8210                 # browser (feed reader) prefers text/xml
8211                 $content_type = 'text/xml';
8212         }
8213         if (defined($commitlist[0])) {
8214                 %latest_commit = %{$commitlist[0]};
8215                 my $latest_epoch = $latest_commit{'committer_epoch'};
8216                 exit_if_unmodified_since($latest_epoch);
8217                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8218         }
8219         print $cgi->header(
8220                 -type => $content_type,
8221                 -charset => 'utf-8',
8222                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8223                 -status => '200 OK');
8224
8225         # Optimization: skip generating the body if client asks only
8226         # for Last-Modified date.
8227         return if ($cgi->request_method() eq 'HEAD');
8228
8229         # header variables
8230         my $title = "$site_name - $project/$action";
8231         my $feed_type = 'log';
8232         if (defined $hash) {
8233                 $title .= " - '$hash'";
8234                 $feed_type = 'branch log';
8235                 if (defined $file_name) {
8236                         $title .= " :: $file_name";
8237                         $feed_type = 'history';
8238                 }
8239         } elsif (defined $file_name) {
8240                 $title .= " - $file_name";
8241                 $feed_type = 'history';
8242         }
8243         $title .= " $feed_type";
8244         $title = esc_html($title);
8245         my $descr = git_get_project_description($project);
8246         if (defined $descr) {
8247                 $descr = esc_html($descr);
8248         } else {
8249                 $descr = "$project " .
8250                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8251                          " feed";
8252         }
8253         my $owner = git_get_project_owner($project);
8254         $owner = esc_html($owner);
8255
8256         #header
8257         my $alt_url;
8258         if (defined $file_name) {
8259                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8260         } elsif (defined $hash) {
8261                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8262         } else {
8263                 $alt_url = href(-full=>1, action=>"summary");
8264         }
8265         $alt_url = esc_attr($alt_url);
8266         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8267         if ($format eq 'rss') {
8268                 print <<XML;
8269 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8270 <channel>
8271 XML
8272                 print "<title>$title</title>\n" .
8273                       "<link>$alt_url</link>\n" .
8274                       "<description>$descr</description>\n" .
8275                       "<language>en</language>\n" .
8276                       # project owner is responsible for 'editorial' content
8277                       "<managingEditor>$owner</managingEditor>\n";
8278                 if (defined $logo || defined $favicon) {
8279                         # prefer the logo to the favicon, since RSS
8280                         # doesn't allow both
8281                         my $img = esc_url($logo || $favicon);
8282                         print "<image>\n" .
8283                               "<url>$img</url>\n" .
8284                               "<title>$title</title>\n" .
8285                               "<link>$alt_url</link>\n" .
8286                               "</image>\n";
8287                 }
8288                 if (%latest_date) {
8289                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8290                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8291                 }
8292                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8293         } elsif ($format eq 'atom') {
8294                 print <<XML;
8295 <feed xmlns="http://www.w3.org/2005/Atom">
8296 XML
8297                 print "<title>$title</title>\n" .
8298                       "<subtitle>$descr</subtitle>\n" .
8299                       '<link rel="alternate" type="text/html" href="' .
8300                       $alt_url . '" />' . "\n" .
8301                       '<link rel="self" type="' . $content_type . '" href="' .
8302                       $cgi->self_url() . '" />' . "\n" .
8303                       "<id>" . esc_url(href(-full=>1)) . "</id>\n" .
8304                       # use project owner for feed author
8305                       "<author><name>$owner</name></author>\n";
8306                 if (defined $favicon) {
8307                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8308                 }
8309                 if (defined $logo) {
8310                         # not twice as wide as tall: 72 x 27 pixels
8311                         print "<logo>" . esc_url($logo) . "</logo>\n";
8312                 }
8313                 if (! %latest_date) {
8314                         # dummy date to keep the feed valid until commits trickle in:
8315                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8316                 } else {
8317                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8318                 }
8319                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8320         }
8321
8322         # contents
8323         for (my $i = 0; $i <= $#commitlist; $i++) {
8324                 my %co = %{$commitlist[$i]};
8325                 my $commit = $co{'id'};
8326                 # we read 150, we always show 30 and the ones more recent than 48 hours
8327                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8328                         last;
8329                 }
8330                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8331
8332                 # get list of changed files
8333                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8334                         $co{'parent'} || "--root",
8335                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8336                         or next;
8337                 my @difftree = map { chomp; $_ } <$fd>;
8338                 close $fd
8339                         or next;
8340
8341                 # print element (entry, item)
8342                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8343                 if ($format eq 'rss') {
8344                         print "<item>\n" .
8345                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8346                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8347                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8348                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8349                               "<link>" . esc_html($co_url) . "</link>\n" .
8350                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8351                               "<content:encoded>" .
8352                               "<![CDATA[\n";
8353                 } elsif ($format eq 'atom') {
8354                         print "<entry>\n" .
8355                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8356                               "<updated>$cd{'iso-8601'}</updated>\n" .
8357                               "<author>\n" .
8358                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8359                         if ($co{'author_email'}) {
8360                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8361                         }
8362                         print "</author>\n" .
8363                               # use committer for contributor
8364                               "<contributor>\n" .
8365                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8366                         if ($co{'committer_email'}) {
8367                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8368                         }
8369                         print "</contributor>\n" .
8370                               "<published>$cd{'iso-8601'}</published>\n" .
8371                               "<link rel=\"alternate\" type=\"text/html\" href=\"" . esc_attr($co_url) . "\" />\n" .
8372                               "<id>" . esc_html($co_url) . "</id>\n" .
8373                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8374                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8375                 }
8376                 my $comment = $co{'comment'};
8377                 print "<pre>\n";
8378                 foreach my $line (@$comment) {
8379                         $line = esc_html($line);
8380                         print "$line\n";
8381                 }
8382                 print "</pre><ul>\n";
8383                 foreach my $difftree_line (@difftree) {
8384                         my %difftree = parse_difftree_raw_line($difftree_line);
8385                         next if !$difftree{'from_id'};
8386
8387                         my $file = $difftree{'file'} || $difftree{'to_file'};
8388
8389                         print "<li>" .
8390                               "[" .
8391                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8392                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8393                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8394                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8395                                       -title => "diff"}, 'D');
8396                         if ($have_blame) {
8397                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8398                                                              file_name=>$file, hash_base=>$commit),
8399                                               -title => "blame"}, 'B');
8400                         }
8401                         # if this is not a feed of a file history
8402                         if (!defined $file_name || $file_name ne $file) {
8403                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8404                                                              file_name=>$file, hash=>$commit),
8405                                               -title => "history"}, 'H');
8406                         }
8407                         $file = esc_path($file);
8408                         print "] ".
8409                               "$file</li>\n";
8410                 }
8411                 if ($format eq 'rss') {
8412                         print "</ul>]]>\n" .
8413                               "</content:encoded>\n" .
8414                               "</item>\n";
8415                 } elsif ($format eq 'atom') {
8416                         print "</ul>\n</div>\n" .
8417                               "</content>\n" .
8418                               "</entry>\n";
8419                 }
8420         }
8421
8422         # end of feed
8423         if ($format eq 'rss') {
8424                 print "</channel>\n</rss>\n";
8425         } elsif ($format eq 'atom') {
8426                 print "</feed>\n";
8427         }
8428 }
8429
8430 sub git_rss {
8431         git_feed('rss');
8432 }
8433
8434 sub git_atom {
8435         git_feed('atom');
8436 }
8437
8438 sub git_opml {
8439         my @list = git_get_projects_list($project_filter, $strict_export);
8440         if (!@list) {
8441                 die_error(404, "No projects found");
8442         }
8443
8444         print $cgi->header(
8445                 -type => 'text/xml',
8446                 -charset => 'utf-8',
8447                 -content_disposition => 'inline; filename="opml.xml"');
8448
8449         my $title = esc_html($site_name);
8450         my $filter = " within subdirectory ";
8451         if (defined $project_filter) {
8452                 $filter .= esc_html($project_filter);
8453         } else {
8454                 $filter = "";
8455         }
8456         print <<XML;
8457 <?xml version="1.0" encoding="utf-8"?>
8458 <opml version="1.0">
8459 <head>
8460   <title>$title OPML Export$filter</title>
8461 </head>
8462 <body>
8463 <outline text="git RSS feeds">
8464 XML
8465
8466         foreach my $pr (@list) {
8467                 my %proj = %$pr;
8468                 my $head = git_get_head_hash($proj{'path'});
8469                 if (!defined $head) {
8470                         next;
8471                 }
8472                 $git_dir = "$projectroot/$proj{'path'}";
8473                 my %co = parse_commit($head);
8474                 if (!%co) {
8475                         next;
8476                 }
8477
8478                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8479                 my $rss  = esc_attr(href('project' => $proj{'path'}, 'action' => 'rss', -full => 1));
8480                 my $html = esc_attr(href('project' => $proj{'path'}, 'action' => 'summary', -full => 1));
8481                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8482         }
8483         print <<XML;
8484 </outline>
8485 </body>
8486 </opml>
8487 XML
8488 }