gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 use CGI qw(:standard :escapeHTML -nosticky);
  14 use CGI::Util qw(unescape);
  15 use CGI::Carp qw(fatalsToBrowser set_message);
  16 use Encode;
  17 use Fcntl ':mode';
  18 use File::Find qw();
  19 use File::Basename qw(basename);
  20 use Time::HiRes qw(gettimeofday tv_interval);
  21 binmode STDOUT, ':utf8';
  22
  23 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  24         eval 'sub CGI::multi_param { CGI::param(@_) }'
  25 }
  26
  27 our $t0 = [ gettimeofday() ];
  28 our $number_of_git_cmds = 0;
  29
  30 BEGIN {
  31         CGI->compile() if $ENV{'MOD_PERL'};
  32 }
  33
  34 our $version = "++GIT_VERSION++";
  35
  36 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  37 sub evaluate_uri {
  38         our $cgi;
  39
  40         our $my_url = $cgi->url();
  41         our $my_uri = $cgi->url(-absolute => 1);
  42
  43         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  44         # needed and used only for URLs with nonempty PATH_INFO
  45         # This must be an absolute URL (i.e. no scheme, host or port), NOT a full one
  46         our $base_url = $my_uri || '/';
  47
  48         # When the script is used as DirectoryIndex, the URL does not contain the name
  49         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  50         # have to do it ourselves. We make $path_info global because it's also used
  51         # later on.
  52         #
  53         # Another issue with the script being the DirectoryIndex is that the resulting
  54         # $my_url data is not the full script URL: this is good, because we want
  55         # generated links to keep implying the script name if it wasn't explicitly
  56         # indicated in the URL we're handling, but it means that $my_url cannot be used
  57         # as base URL.
  58         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  59         # to build the base URL ourselves:
  60         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  61         if ($path_info) {
  62                 # $path_info has already been URL-decoded by the web server, but
  63                 # $my_url and $my_uri have not. URL-decode them so we can properly
  64                 # strip $path_info.
  65                 $my_url = unescape($my_url);
  66                 $my_uri = unescape($my_uri);
  67                 if ($my_url =~ s,\Q$path_info\E$,, &&
  68                     $my_uri =~ s,\Q$path_info\E$,, &&
  69                     defined $ENV{'SCRIPT_NAME'}) {
  70                         $base_url = $ENV{'SCRIPT_NAME'} || '/';
  71                 }
  72         }
  73
  74         # target of the home link on top of all pages
  75         our $home_link = $my_uri || "/";
  76 }
  77
  78 # core git executable to use
  79 # this can just be "git" if your webserver has a sensible PATH
  80 our $GIT = "++GIT_BINDIR++/git";
  81
  82 # absolute fs-path which will be prepended to the project path
  83 #our $projectroot = "/pub/scm";
  84 our $projectroot = "++GITWEB_PROJECTROOT++";
  85
  86 # fs traversing limit for getting project list
  87 # the number is relative to the projectroot
  88 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  89
  90 # string of the home link on top of all pages
  91 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  92
  93 # extra breadcrumbs preceding the home link
  94 our @extra_breadcrumbs = ();
  95
  96 # name of your site or organization to appear in page titles
  97 # replace this with something more descriptive for clearer bookmarks
  98 our $site_name = "++GITWEB_SITENAME++"
  99                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
 100
 101 # html snippet to include in the <head> section of each page
 102 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
 103 # filename of html text to include at top of each page
 104 our $site_header = "++GITWEB_SITE_HEADER++";
 105 # html text to include at home page
 106 our $home_text = "++GITWEB_HOMETEXT++";
 107 # filename of html text to include at bottom of each page
 108 our $site_footer = "++GITWEB_SITE_FOOTER++";
 109
 110 # URI of stylesheets
 111 our @stylesheets = ("++GITWEB_CSS++");
 112 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 113 our $stylesheet = undef;
 114 # URI of GIT logo (72x27 size)
 115 our $logo = "++GITWEB_LOGO++";
 116 # URI of GIT favicon, assumed to be image/png type
 117 our $favicon = "++GITWEB_FAVICON++";
 118 # URI of gitweb.js (JavaScript code for gitweb)
 119 our $javascript = "++GITWEB_JS++";
 120
 121 # URI and label (title) of GIT logo link
 122 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 123 #our $logo_label = "git documentation";
 124 our $logo_url = "http://git-scm.com/";
 125 our $logo_label = "git homepage";
 126
 127 # source of projects list
 128 our $projects_list = "++GITWEB_LIST++";
 129
 130 # the width (in characters) of the projects list "Description" column
 131 our $projects_list_description_width = 25;
 132
 133 # group projects by category on the projects list
 134 # (enabled if this variable evaluates to true)
 135 our $projects_list_group_categories = 0;
 136
 137 # default category if none specified
 138 # (leave the empty string for no category)
 139 our $project_list_default_category = "";
 140
 141 # default order of projects list
 142 # valid values are none, project, descr, owner, and age
 143 our $default_projects_order = "project";
 144
 145 # show repository only if this file exists
 146 # (only effective if this variable evaluates to true)
 147 our $export_ok = "++GITWEB_EXPORT_OK++";
 148
 149 # don't generate age column on the projects list page
 150 our $omit_age_column = 0;
 151
 152 # don't generate information about owners of repositories
 153 our $omit_owner=0;
 154
 155 # show repository only if this subroutine returns true
 156 # when given the path to the project, for example:
 157 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 158 our $export_auth_hook = undef;
 159
 160 # only allow viewing of repositories also shown on the overview page
 161 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 162
 163 # list of git base URLs used for URL to where fetch project from,
 164 # i.e. full URL is "$git_base_url/$project"
 165 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 166
 167 # default blob_plain mimetype and default charset for text/plain blob
 168 our $default_blob_plain_mimetype = 'text/plain';
 169 our $default_text_plain_charset  = undef;
 170
 171 # file to use for guessing MIME types before trying /etc/mime.types
 172 # (relative to the current git repository)
 173 our $mimetypes_file = undef;
 174
 175 # assume this charset if line contains non-UTF-8 characters;
 176 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 177 # for which encoding all byte sequences are valid, for example
 178 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 179 # could be even 'utf-8' for the old behavior)
 180 our $fallback_encoding = 'latin1';
 181
 182 # rename detection options for git-diff and git-diff-tree
 183 # - default is '-M', with the cost proportional to
 184 #   (number of removed files) * (number of new files).
 185 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 186 #   (number of changed files + number of removed files) * (number of new files)
 187 # - even more costly is '-C', '--find-copies-harder' with cost
 188 #   (number of files in the original tree) * (number of new files)
 189 # - one might want to include '-B' option, e.g. '-B', '-M'
 190 our @diff_opts = ('-M'); # taken from git_commit
 191
 192 # Disables features that would allow repository owners to inject script into
 193 # the gitweb domain.
 194 our $prevent_xss = 0;
 195
 196 # Path to the highlight executable to use (must be the one from
 197 # http://www.andre-simon.de due to assumptions about parameters and output).
 198 # Useful if highlight is not installed on your webserver's PATH.
 199 # [Default: highlight]
 200 our $highlight_bin = "++HIGHLIGHT_BIN++";
 201
 202 # information about snapshot formats that gitweb is capable of serving
 203 our %known_snapshot_formats = (
 204         # name => {
 205         #       'display' => display name,
 206         #       'type' => mime type,
 207         #       'suffix' => filename suffix,
 208         #       'format' => --format for git-archive,
 209         #       'compressor' => [compressor command and arguments]
 210         #                       (array reference, optional)
 211         #       'disabled' => boolean (optional)}
 212         #
 213         'tgz' => {
 214                 'display' => 'tar.gz',
 215                 'type' => 'application/x-gzip',
 216                 'suffix' => '.tar.gz',
 217                 'format' => 'tar',
 218                 'compressor' => ['gzip', '-n']},
 219
 220         'tbz2' => {
 221                 'display' => 'tar.bz2',
 222                 'type' => 'application/x-bzip2',
 223                 'suffix' => '.tar.bz2',
 224                 'format' => 'tar',
 225                 'compressor' => ['bzip2']},
 226
 227         'txz' => {
 228                 'display' => 'tar.xz',
 229                 'type' => 'application/x-xz',
 230                 'suffix' => '.tar.xz',
 231                 'format' => 'tar',
 232                 'compressor' => ['xz'],
 233                 'disabled' => 1},
 234
 235         'zip' => {
 236                 'display' => 'zip',
 237                 'type' => 'application/x-zip',
 238                 'suffix' => '.zip',
 239                 'format' => 'zip'},
 240 );
 241
 242 # Aliases so we understand old gitweb.snapshot values in repository
 243 # configuration.
 244 our %known_snapshot_format_aliases = (
 245         'gzip'  => 'tgz',
 246         'bzip2' => 'tbz2',
 247         'xz'    => 'txz',
 248
 249         # backward compatibility: legacy gitweb config support
 250         'x-gzip' => undef, 'gz' => undef,
 251         'x-bzip2' => undef, 'bz2' => undef,
 252         'x-zip' => undef, '' => undef,
 253 );
 254
 255 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 256 # are changed, it may be appropriate to change these values too via
 257 # $GITWEB_CONFIG.
 258 our %avatar_size = (
 259         'default' => 16,
 260         'double'  => 32
 261 );
 262
 263 # Used to set the maximum load that we will still respond to gitweb queries.
 264 # If server load exceed this value then return "503 server busy" error.
 265 # If gitweb cannot determined server load, it is taken to be 0.
 266 # Leave it undefined (or set to 'undef') to turn off load checking.
 267 our $maxload = 300;
 268
 269 # configuration for 'highlight' (http://www.andre-simon.de/)
 270 # match by basename
 271 our %highlight_basename = (
 272         #'Program' => 'py',
 273         #'Library' => 'py',
 274         'SConstruct' => 'py', # SCons equivalent of Makefile
 275         'Makefile' => 'make',
 276 );
 277 # match by extension
 278 our %highlight_ext = (
 279         # main extensions, defining name of syntax;
 280         # see files in /usr/share/highlight/langDefs/ directory
 281         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 282         # alternate extensions, see /etc/highlight/filetypes.conf
 283         (map { $_ => 'c'   } qw(c h)),
 284         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 285         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 286         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 287         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 288         (map { $_ => 'make'} qw(make mak mk)),
 289         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 290 );
 291
 292 # You define site-wide feature defaults here; override them with
 293 # $GITWEB_CONFIG as necessary.
 294 our %feature = (
 295         # feature => {
 296         #       'sub' => feature-sub (subroutine),
 297         #       'override' => allow-override (boolean),
 298         #       'default' => [ default options...] (array reference)}
 299         #
 300         # if feature is overridable (it means that allow-override has true value),
 301         # then feature-sub will be called with default options as parameters;
 302         # return value of feature-sub indicates if to enable specified feature
 303         #
 304         # if there is no 'sub' key (no feature-sub), then feature cannot be
 305         # overridden
 306         #
 307         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 308         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 309         # is enabled
 310
 311         # Enable the 'blame' blob view, showing the last commit that modified
 312         # each line in the file. This can be very CPU-intensive.
 313
 314         # To enable system wide have in $GITWEB_CONFIG
 315         # $feature{'blame'}{'default'} = [1];
 316         # To have project specific config enable override in $GITWEB_CONFIG
 317         # $feature{'blame'}{'override'} = 1;
 318         # and in project config gitweb.blame = 0|1;
 319         'blame' => {
 320                 'sub' => sub { feature_bool('blame', @_) },
 321                 'override' => 0,
 322                 'default' => [0]},
 323
 324         # Enable the 'snapshot' link, providing a compressed archive of any
 325         # tree. This can potentially generate high traffic if you have large
 326         # project.
 327
 328         # Value is a list of formats defined in %known_snapshot_formats that
 329         # you wish to offer.
 330         # To disable system wide have in $GITWEB_CONFIG
 331         # $feature{'snapshot'}{'default'} = [];
 332         # To have project specific config enable override in $GITWEB_CONFIG
 333         # $feature{'snapshot'}{'override'} = 1;
 334         # and in project config, a comma-separated list of formats or "none"
 335         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 336         'snapshot' => {
 337                 'sub' => \&feature_snapshot,
 338                 'override' => 0,
 339                 'default' => ['tgz']},
 340
 341         # Enable text search, which will list the commits which match author,
 342         # committer or commit text to a given string.  Enabled by default.
 343         # Project specific override is not supported.
 344         #
 345         # Note that this controls all search features, which means that if
 346         # it is disabled, then 'grep' and 'pickaxe' search would also be
 347         # disabled.
 348         'search' => {
 349                 'override' => 0,
 350                 'default' => [1]},
 351
 352         # Enable grep search, which will list the files in currently selected
 353         # tree containing the given string. Enabled by default. This can be
 354         # potentially CPU-intensive, of course.
 355         # Note that you need to have 'search' feature enabled too.
 356
 357         # To enable system wide have in $GITWEB_CONFIG
 358         # $feature{'grep'}{'default'} = [1];
 359         # To have project specific config enable override in $GITWEB_CONFIG
 360         # $feature{'grep'}{'override'} = 1;
 361         # and in project config gitweb.grep = 0|1;
 362         'grep' => {
 363                 'sub' => sub { feature_bool('grep', @_) },
 364                 'override' => 0,
 365                 'default' => [1]},
 366
 367         # Enable the pickaxe search, which will list the commits that modified
 368         # a given string in a file. This can be practical and quite faster
 369         # alternative to 'blame', but still potentially CPU-intensive.
 370         # Note that you need to have 'search' feature enabled too.
 371
 372         # To enable system wide have in $GITWEB_CONFIG
 373         # $feature{'pickaxe'}{'default'} = [1];
 374         # To have project specific config enable override in $GITWEB_CONFIG
 375         # $feature{'pickaxe'}{'override'} = 1;
 376         # and in project config gitweb.pickaxe = 0|1;
 377         'pickaxe' => {
 378                 'sub' => sub { feature_bool('pickaxe', @_) },
 379                 'override' => 0,
 380                 'default' => [1]},
 381
 382         # Enable showing size of blobs in a 'tree' view, in a separate
 383         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 384
 385         # To disable system wide have in $GITWEB_CONFIG
 386         # $feature{'show-sizes'}{'default'} = [0];
 387         # To have project specific config enable override in $GITWEB_CONFIG
 388         # $feature{'show-sizes'}{'override'} = 1;
 389         # and in project config gitweb.showsizes = 0|1;
 390         'show-sizes' => {
 391                 'sub' => sub { feature_bool('showsizes', @_) },
 392                 'override' => 0,
 393                 'default' => [1]},
 394
 395         # Make gitweb use an alternative format of the URLs which can be
 396         # more readable and natural-looking: project name is embedded
 397         # directly in the path and the query string contains other
 398         # auxiliary information. All gitweb installations recognize
 399         # URL in either format; this configures in which formats gitweb
 400         # generates links.
 401
 402         # To enable system wide have in $GITWEB_CONFIG
 403         # $feature{'pathinfo'}{'default'} = [1];
 404         # Project specific override is not supported.
 405
 406         # Note that you will need to change the default location of CSS,
 407         # favicon, logo and possibly other files to an absolute URL. Also,
 408         # if gitweb.cgi serves as your indexfile, you will need to force
 409         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 410         'pathinfo' => {
 411                 'override' => 0,
 412                 'default' => [0]},
 413
 414         # Make gitweb consider projects in project root subdirectories
 415         # to be forks of existing projects. Given project $projname.git,
 416         # projects matching $projname/*.git will not be shown in the main
 417         # projects list, instead a '+' mark will be added to $projname
 418         # there and a 'forks' view will be enabled for the project, listing
 419         # all the forks. If project list is taken from a file, forks have
 420         # to be listed after the main project.
 421
 422         # To enable system wide have in $GITWEB_CONFIG
 423         # $feature{'forks'}{'default'} = [1];
 424         # Project specific override is not supported.
 425         'forks' => {
 426                 'override' => 0,
 427                 'default' => [0]},
 428
 429         # Insert custom links to the action bar of all project pages.
 430         # This enables you mainly to link to third-party scripts integrating
 431         # into gitweb; e.g. git-browser for graphical history representation
 432         # or custom web-based repository administration interface.
 433
 434         # The 'default' value consists of a list of triplets in the form
 435         # (label, link, position) where position is the label after which
 436         # to insert the link and link is a format string where %n expands
 437         # to the project name, %f to the project path within the filesystem,
 438         # %h to the current hash (h gitweb parameter) and %b to the current
 439         # hash base (hb gitweb parameter); %% expands to %.
 440
 441         # To enable system wide have in $GITWEB_CONFIG e.g.
 442         # $feature{'actions'}{'default'} = [('graphiclog',
 443         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 444         # Project specific override is not supported.
 445         'actions' => {
 446                 'override' => 0,
 447                 'default' => []},
 448
 449         # Allow gitweb scan project content tags of project repository,
 450         # and display the popular Web 2.0-ish "tag cloud" near the projects
 451         # list.  Note that this is something COMPLETELY different from the
 452         # normal Git tags.
 453
 454         # gitweb by itself can show existing tags, but it does not handle
 455         # tagging itself; you need to do it externally, outside gitweb.
 456         # The format is described in git_get_project_ctags() subroutine.
 457         # You may want to install the HTML::TagCloud Perl module to get
 458         # a pretty tag cloud instead of just a list of tags.
 459
 460         # To enable system wide have in $GITWEB_CONFIG
 461         # $feature{'ctags'}{'default'} = [1];
 462         # Project specific override is not supported.
 463
 464         # In the future whether ctags editing is enabled might depend
 465         # on the value, but using 1 should always mean no editing of ctags.
 466         'ctags' => {
 467                 'override' => 0,
 468                 'default' => [0]},
 469
 470         # The maximum number of patches in a patchset generated in patch
 471         # view. Set this to 0 or undef to disable patch view, or to a
 472         # negative number to remove any limit.
 473
 474         # To disable system wide have in $GITWEB_CONFIG
 475         # $feature{'patches'}{'default'} = [0];
 476         # To have project specific config enable override in $GITWEB_CONFIG
 477         # $feature{'patches'}{'override'} = 1;
 478         # and in project config gitweb.patches = 0|n;
 479         # where n is the maximum number of patches allowed in a patchset.
 480         'patches' => {
 481                 'sub' => \&feature_patches,
 482                 'override' => 0,
 483                 'default' => [16]},
 484
 485         # Avatar support. When this feature is enabled, views such as
 486         # shortlog or commit will display an avatar associated with
 487         # the email of the committer(s) and/or author(s).
 488
 489         # Currently available providers are gravatar and picon.
 490         # If an unknown provider is specified, the feature is disabled.
 491
 492         # Gravatar depends on Digest::MD5.
 493         # Picon currently relies on the indiana.edu database.
 494
 495         # To enable system wide have in $GITWEB_CONFIG
 496         # $feature{'avatar'}{'default'} = ['<provider>'];
 497         # where <provider> is either gravatar or picon.
 498         # To have project specific config enable override in $GITWEB_CONFIG
 499         # $feature{'avatar'}{'override'} = 1;
 500         # and in project config gitweb.avatar = <provider>;
 501         'avatar' => {
 502                 'sub' => \&feature_avatar,
 503                 'override' => 0,
 504                 'default' => ['']},
 505
 506         # Enable displaying how much time and how many git commands
 507         # it took to generate and display page.  Disabled by default.
 508         # Project specific override is not supported.
 509         'timed' => {
 510                 'override' => 0,
 511                 'default' => [0]},
 512
 513         # Enable turning some links into links to actions which require
 514         # JavaScript to run (like 'blame_incremental').  Not enabled by
 515         # default.  Project specific override is currently not supported.
 516         'javascript-actions' => {
 517                 'override' => 0,
 518                 'default' => [0]},
 519
 520         # Enable and configure ability to change common timezone for dates
 521         # in gitweb output via JavaScript.  Enabled by default.
 522         # Project specific override is not supported.
 523         'javascript-timezone' => {
 524                 'override' => 0,
 525                 'default' => [
 526                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 527                                      # or undef to turn off this feature
 528                         'gitweb_tz', # name of cookie where to store selected timezone
 529                         'datetime',  # CSS class used to mark up dates for manipulation
 530                 ]},
 531
 532         # Syntax highlighting support. This is based on Daniel Svensson's
 533         # and Sham Chukoury's work in gitweb-xmms2.git.
 534         # It requires the 'highlight' program present in $PATH,
 535         # and therefore is disabled by default.
 536
 537         # To enable system wide have in $GITWEB_CONFIG
 538         # $feature{'highlight'}{'default'} = [1];
 539
 540         'highlight' => {
 541                 'sub' => sub { feature_bool('highlight', @_) },
 542                 'override' => 0,
 543                 'default' => [0]},
 544
 545         # Enable displaying of remote heads in the heads list
 546
 547         # To enable system wide have in $GITWEB_CONFIG
 548         # $feature{'remote_heads'}{'default'} = [1];
 549         # To have project specific config enable override in $GITWEB_CONFIG
 550         # $feature{'remote_heads'}{'override'} = 1;
 551         # and in project config gitweb.remoteheads = 0|1;
 552         'remote_heads' => {
 553                 'sub' => sub { feature_bool('remote_heads', @_) },
 554                 'override' => 0,
 555                 'default' => [0]},
 556
 557         # Enable showing branches under other refs in addition to heads
 558
 559         # To set system wide extra branch refs have in $GITWEB_CONFIG
 560         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 561         # To have project specific config enable override in $GITWEB_CONFIG
 562         # $feature{'extra-branch-refs'}{'override'} = 1;
 563         # and in project config gitweb.extrabranchrefs = dirs of choice
 564         # Every directory is separated with whitespace.
 565
 566         'extra-branch-refs' => {
 567                 'sub' => \&feature_extra_branch_refs,
 568                 'override' => 0,
 569                 'default' => []},
 570 );
 571
 572 sub gitweb_get_feature {
 573         my ($name) = @_;
 574         return unless exists $feature{$name};
 575         my ($sub, $override, @defaults) = (
 576                 $feature{$name}{'sub'},
 577                 $feature{$name}{'override'},
 578                 @{$feature{$name}{'default'}});
 579         # project specific override is possible only if we have project
 580         our $git_dir; # global variable, declared later
 581         if (!$override || !defined $git_dir) {
 582                 return @defaults;
 583         }
 584         if (!defined $sub) {
 585                 warn "feature $name is not overridable";
 586                 return @defaults;
 587         }
 588         return $sub->(@defaults);
 589 }
 590
 591 # A wrapper to check if a given feature is enabled.
 592 # With this, you can say
 593 #
 594 #   my $bool_feat = gitweb_check_feature('bool_feat');
 595 #   gitweb_check_feature('bool_feat') or somecode;
 596 #
 597 # instead of
 598 #
 599 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 600 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 601 #
 602 sub gitweb_check_feature {
 603         return (gitweb_get_feature(@_))[0];
 604 }
 605
 606
 607 sub feature_bool {
 608         my $key = shift;
 609         my ($val) = git_get_project_config($key, '--bool');
 610
 611         if (!defined $val) {
 612                 return ($_[0]);
 613         } elsif ($val eq 'true') {
 614                 return (1);
 615         } elsif ($val eq 'false') {
 616                 return (0);
 617         }
 618 }
 619
 620 sub feature_snapshot {
 621         my (@fmts) = @_;
 622
 623         my ($val) = git_get_project_config('snapshot');
 624
 625         if ($val) {
 626                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 627         }
 628
 629         return @fmts;
 630 }
 631
 632 sub feature_patches {
 633         my @val = (git_get_project_config('patches', '--int'));
 634
 635         if (@val) {
 636                 return @val;
 637         }
 638
 639         return ($_[0]);
 640 }
 641
 642 sub feature_avatar {
 643         my @val = (git_get_project_config('avatar'));
 644
 645         return @val ? @val : @_;
 646 }
 647
 648 sub feature_extra_branch_refs {
 649         my (@branch_refs) = @_;
 650         my $values = git_get_project_config('extrabranchrefs');
 651
 652         if ($values) {
 653                 $values = config_to_multi ($values);
 654                 @branch_refs = ();
 655                 foreach my $value (@{$values}) {
 656                         push @branch_refs, split /\s+/, $value;
 657                 }
 658         }
 659
 660         return @branch_refs;
 661 }
 662
 663 # checking HEAD file with -e is fragile if the repository was
 664 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 665 # and then pruned.
 666 sub check_head_link {
 667         my ($dir) = @_;
 668         my $headfile = "$dir/HEAD";
 669         return ((-e $headfile) ||
 670                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 671 }
 672
 673 sub check_export_ok {
 674         my ($dir) = @_;
 675         return (check_head_link($dir) &&
 676                 (!$export_ok || -e "$dir/$export_ok") &&
 677                 (!$export_auth_hook || $export_auth_hook->($dir)));
 678 }
 679
 680 # process alternate names for backward compatibility
 681 # filter out unsupported (unknown) snapshot formats
 682 sub filter_snapshot_fmts {
 683         my @fmts = @_;
 684
 685         @fmts = map {
 686                 exists $known_snapshot_format_aliases{$_} ?
 687                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 688         @fmts = grep {
 689                 exists $known_snapshot_formats{$_} &&
 690                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 691 }
 692
 693 sub filter_and_validate_refs {
 694         my @refs = @_;
 695         my %unique_refs = ();
 696
 697         foreach my $ref (@refs) {
 698                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 699                 # 'heads' are added implicitly in get_branch_refs().
 700                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 701         }
 702         return sort keys %unique_refs;
 703 }
 704
 705 # If it is set to code reference, it is code that it is to be run once per
 706 # request, allowing updating configurations that change with each request,
 707 # while running other code in config file only once.
 708 #
 709 # Otherwise, if it is false then gitweb would process config file only once;
 710 # if it is true then gitweb config would be run for each request.
 711 our $per_request_config = 1;
 712
 713 # read and parse gitweb config file given by its parameter.
 714 # returns true on success, false on recoverable error, allowing
 715 # to chain this subroutine, using first file that exists.
 716 # dies on errors during parsing config file, as it is unrecoverable.
 717 sub read_config_file {
 718         my $filename = shift;
 719         return unless defined $filename;
 720         # die if there are errors parsing config file
 721         if (-e $filename) {
 722                 do $filename;
 723                 die $@ if $@;
 724                 return 1;
 725         }
 726         return;
 727 }
 728
 729 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 730 sub evaluate_gitweb_config {
 731         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 732         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 733         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 734
 735         # Protect against duplications of file names, to not read config twice.
 736         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 737         # there possibility of duplication of filename there doesn't matter.
 738         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 739         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 740
 741         # Common system-wide settings for convenience.
 742         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 743         read_config_file($GITWEB_CONFIG_COMMON);
 744
 745         # Use first config file that exists.  This means use the per-instance
 746         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 747         read_config_file($GITWEB_CONFIG) and return;
 748         read_config_file($GITWEB_CONFIG_SYSTEM);
 749 }
 750
 751 # Get loadavg of system, to compare against $maxload.
 752 # Currently it requires '/proc/loadavg' present to get loadavg;
 753 # if it is not present it returns 0, which means no load checking.
 754 sub get_loadavg {
 755         if( -e '/proc/loadavg' ){
 756                 open my $fd, '<', '/proc/loadavg'
 757                         or return 0;
 758                 my @load = split(/\s+/, scalar <$fd>);
 759                 close $fd;
 760
 761                 # The first three columns measure CPU and IO utilization of the last one,
 762                 # five, and 10 minute periods.  The fourth column shows the number of
 763                 # currently running processes and the total number of processes in the m/n
 764                 # format.  The last column displays the last process ID used.
 765                 return $load[0] || 0;
 766         }
 767         # additional checks for load average should go here for things that don't export
 768         # /proc/loadavg
 769
 770         return 0;
 771 }
 772
 773 # version of the core git binary
 774 our $git_version;
 775 sub evaluate_git_version {
 776         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 777         $number_of_git_cmds++;
 778 }
 779
 780 sub check_loadavg {
 781         if (defined $maxload && get_loadavg() > $maxload) {
 782                 die_error(503, "The load average on the server is too high");
 783         }
 784 }
 785
 786 # ======================================================================
 787 # input validation and dispatch
 788
 789 # input parameters can be collected from a variety of sources (presently, CGI
 790 # and PATH_INFO), so we define an %input_params hash that collects them all
 791 # together during validation: this allows subsequent uses (e.g. href()) to be
 792 # agnostic of the parameter origin
 793
 794 our %input_params = ();
 795
 796 # input parameters are stored with the long parameter name as key. This will
 797 # also be used in the href subroutine to convert parameters to their CGI
 798 # equivalent, and since the href() usage is the most frequent one, we store
 799 # the name -> CGI key mapping here, instead of the reverse.
 800 #
 801 # XXX: Warning: If you touch this, check the search form for updating,
 802 # too.
 803
 804 our @cgi_param_mapping = (
 805         project => "p",
 806         action => "a",
 807         file_name => "f",
 808         file_parent => "fp",
 809         hash => "h",
 810         hash_parent => "hp",
 811         hash_base => "hb",
 812         hash_parent_base => "hpb",
 813         page => "pg",
 814         order => "o",
 815         searchtext => "s",
 816         searchtype => "st",
 817         snapshot_format => "sf",
 818         extra_options => "opt",
 819         search_use_regexp => "sr",
 820         ctag => "by_tag",
 821         diff_style => "ds",
 822         project_filter => "pf",
 823         # this must be last entry (for manipulation from JavaScript)
 824         javascript => "js"
 825 );
 826 our %cgi_param_mapping = @cgi_param_mapping;
 827
 828 # we will also need to know the possible actions, for validation
 829 our %actions = (
 830         "blame" => \&git_blame,
 831         "blame_incremental" => \&git_blame_incremental,
 832         "blame_data" => \&git_blame_data,
 833         "blobdiff" => \&git_blobdiff,
 834         "blobdiff_plain" => \&git_blobdiff_plain,
 835         "blob" => \&git_blob,
 836         "blob_plain" => \&git_blob_plain,
 837         "commitdiff" => \&git_commitdiff,
 838         "commitdiff_plain" => \&git_commitdiff_plain,
 839         "commit" => \&git_commit,
 840         "forks" => \&git_forks,
 841         "heads" => \&git_heads,
 842         "history" => \&git_history,
 843         "log" => \&git_log,
 844         "patch" => \&git_patch,
 845         "patches" => \&git_patches,
 846         "remotes" => \&git_remotes,
 847         "rss" => \&git_rss,
 848         "atom" => \&git_atom,
 849         "search" => \&git_search,
 850         "search_help" => \&git_search_help,
 851         "shortlog" => \&git_shortlog,
 852         "summary" => \&git_summary,
 853         "tag" => \&git_tag,
 854         "tags" => \&git_tags,
 855         "tree" => \&git_tree,
 856         "snapshot" => \&git_snapshot,
 857         "object" => \&git_object,
 858         # those below don't need $project
 859         "opml" => \&git_opml,
 860         "project_list" => \&git_project_list,
 861         "project_index" => \&git_project_index,
 862 );
 863
 864 # finally, we have the hash of allowed extra_options for the commands that
 865 # allow them
 866 our %allowed_options = (
 867         "--no-merges" => [ qw(rss atom log shortlog history) ],
 868 );
 869
 870 # fill %input_params with the CGI parameters. All values except for 'opt'
 871 # should be single values, but opt can be an array. We should probably
 872 # build an array of parameters that can be multi-valued, but since for the time
 873 # being it's only this one, we just single it out
 874 sub evaluate_query_params {
 875         our $cgi;
 876
 877         while (my ($name, $symbol) = each %cgi_param_mapping) {
 878                 if ($symbol eq 'opt') {
 879                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 880                 } else {
 881                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 882                 }
 883         }
 884 }
 885
 886 # now read PATH_INFO and update the parameter list for missing parameters
 887 sub evaluate_path_info {
 888         return if defined $input_params{'project'};
 889         return if !$path_info;
 890         $path_info =~ s,^/+,,;
 891         return if !$path_info;
 892
 893         # find which part of PATH_INFO is project
 894         my $project = $path_info;
 895         $project =~ s,/+$,,;
 896         while ($project && !check_head_link("$projectroot/$project")) {
 897                 $project =~ s,/*[^/]*$,,;
 898         }
 899         return unless $project;
 900         $input_params{'project'} = $project;
 901
 902         # do not change any parameters if an action is given using the query string
 903         return if $input_params{'action'};
 904         $path_info =~ s,^\Q$project\E/*,,;
 905
 906         # next, check if we have an action
 907         my $action = $path_info;
 908         $action =~ s,/.*$,,;
 909         if (exists $actions{$action}) {
 910                 $path_info =~ s,^$action/*,,;
 911                 $input_params{'action'} = $action;
 912         }
 913
 914         # list of actions that want hash_base instead of hash, but can have no
 915         # pathname (f) parameter
 916         my @wants_base = (
 917                 'tree',
 918                 'history',
 919         );
 920
 921         # we want to catch, among others
 922         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 923         my ($parentrefname, $parentpathname, $refname, $pathname) =
 924                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 925
 926         # first, analyze the 'current' part
 927         if (defined $pathname) {
 928                 # we got "branch:filename" or "branch:dir/"
 929                 # we could use git_get_type(branch:pathname), but:
 930                 # - it needs $git_dir
 931                 # - it does a git() call
 932                 # - the convention of terminating directories with a slash
 933                 #   makes it superfluous
 934                 # - embedding the action in the PATH_INFO would make it even
 935                 #   more superfluous
 936                 $pathname =~ s,^/+,,;
 937                 if (!$pathname || substr($pathname, -1) eq "/") {
 938                         $input_params{'action'} ||= "tree";
 939                         $pathname =~ s,/$,,;
 940                 } else {
 941                         # the default action depends on whether we had parent info
 942                         # or not
 943                         if ($parentrefname) {
 944                                 $input_params{'action'} ||= "blobdiff_plain";
 945                         } else {
 946                                 $input_params{'action'} ||= "blob_plain";
 947                         }
 948                 }
 949                 $input_params{'hash_base'} ||= $refname;
 950                 $input_params{'file_name'} ||= $pathname;
 951         } elsif (defined $refname) {
 952                 # we got "branch". In this case we have to choose if we have to
 953                 # set hash or hash_base.
 954                 #
 955                 # Most of the actions without a pathname only want hash to be
 956                 # set, except for the ones specified in @wants_base that want
 957                 # hash_base instead. It should also be noted that hand-crafted
 958                 # links having 'history' as an action and no pathname or hash
 959                 # set will fail, but that happens regardless of PATH_INFO.
 960                 if (defined $parentrefname) {
 961                         # if there is parent let the default be 'shortlog' action
 962                         # (for http://git.example.com/repo.git/A..B links); if there
 963                         # is no parent, dispatch will detect type of object and set
 964                         # action appropriately if required (if action is not set)
 965                         $input_params{'action'} ||= "shortlog";
 966                 }
 967                 if ($input_params{'action'} &&
 968                     grep { $_ eq $input_params{'action'} } @wants_base) {
 969                         $input_params{'hash_base'} ||= $refname;
 970                 } else {
 971                         $input_params{'hash'} ||= $refname;
 972                 }
 973         }
 974
 975         # next, handle the 'parent' part, if present
 976         if (defined $parentrefname) {
 977                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 978                 # someproject/blobdiff/oldrev..newrev:/filename
 979                 if ($parentpathname) {
 980                         $parentpathname =~ s,^/+,,;
 981                         $parentpathname =~ s,/$,,;
 982                         $input_params{'file_parent'} ||= $parentpathname;
 983                 } else {
 984                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 985                 }
 986                 # we assume that hash_parent_base is wanted if a path was specified,
 987                 # or if the action wants hash_base instead of hash
 988                 if (defined $input_params{'file_parent'} ||
 989                         grep { $_ eq $input_params{'action'} } @wants_base) {
 990                         $input_params{'hash_parent_base'} ||= $parentrefname;
 991                 } else {
 992                         $input_params{'hash_parent'} ||= $parentrefname;
 993                 }
 994         }
 995
 996         # for the snapshot action, we allow URLs in the form
 997         # $project/snapshot/$hash.ext
 998         # where .ext determines the snapshot and gets removed from the
 999         # passed $refname to provide the $hash.
1000         #
1001         # To be able to tell that $refname includes the format extension, we
1002         # require the following two conditions to be satisfied:
1003         # - the hash input parameter MUST have been set from the $refname part
1004         #   of the URL (i.e. they must be equal)
1005         # - the snapshot format MUST NOT have been defined already (e.g. from
1006         #   CGI parameter sf)
1007         # It's also useless to try any matching unless $refname has a dot,
1008         # so we check for that too
1009         if (defined $input_params{'action'} &&
1010                 $input_params{'action'} eq 'snapshot' &&
1011                 defined $refname && index($refname, '.') != -1 &&
1012                 $refname eq $input_params{'hash'} &&
1013                 !defined $input_params{'snapshot_format'}) {
1014                 # We loop over the known snapshot formats, checking for
1015                 # extensions. Allowed extensions are both the defined suffix
1016                 # (which includes the initial dot already) and the snapshot
1017                 # format key itself, with a prepended dot
1018                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1019                         my $hash = $refname;
1020                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1021                                 next;
1022                         }
1023                         my $sfx = $1;
1024                         # a valid suffix was found, so set the snapshot format
1025                         # and reset the hash parameter
1026                         $input_params{'snapshot_format'} = $fmt;
1027                         $input_params{'hash'} = $hash;
1028                         # we also set the format suffix to the one requested
1029                         # in the URL: this way a request for e.g. .tgz returns
1030                         # a .tgz instead of a .tar.gz
1031                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1032                         last;
1033                 }
1034         }
1035 }
1036
1037 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1038      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1039      $searchtext, $search_regexp, $project_filter);
1040 sub evaluate_and_validate_params {
1041         our $action = $input_params{'action'};
1042         if (defined $action) {
1043                 if (!is_valid_action($action)) {
1044                         die_error(400, "Invalid action parameter");
1045                 }
1046         }
1047
1048         # parameters which are pathnames
1049         our $project = $input_params{'project'};
1050         if (defined $project) {
1051                 if (!is_valid_project($project)) {
1052                         undef $project;
1053                         die_error(404, "No such project");
1054                 }
1055         }
1056
1057         our $project_filter = $input_params{'project_filter'};
1058         if (defined $project_filter) {
1059                 if (!is_valid_pathname($project_filter)) {
1060                         die_error(404, "Invalid project_filter parameter");
1061                 }
1062         }
1063
1064         our $file_name = $input_params{'file_name'};
1065         if (defined $file_name) {
1066                 if (!is_valid_pathname($file_name)) {
1067                         die_error(400, "Invalid file parameter");
1068                 }
1069         }
1070
1071         our $file_parent = $input_params{'file_parent'};
1072         if (defined $file_parent) {
1073                 if (!is_valid_pathname($file_parent)) {
1074                         die_error(400, "Invalid file parent parameter");
1075                 }
1076         }
1077
1078         # parameters which are refnames
1079         our $hash = $input_params{'hash'};
1080         if (defined $hash) {
1081                 if (!is_valid_refname($hash)) {
1082                         die_error(400, "Invalid hash parameter");
1083                 }
1084         }
1085
1086         our $hash_parent = $input_params{'hash_parent'};
1087         if (defined $hash_parent) {
1088                 if (!is_valid_refname($hash_parent)) {
1089                         die_error(400, "Invalid hash parent parameter");
1090                 }
1091         }
1092
1093         our $hash_base = $input_params{'hash_base'};
1094         if (defined $hash_base) {
1095                 if (!is_valid_refname($hash_base)) {
1096                         die_error(400, "Invalid hash base parameter");
1097                 }
1098         }
1099
1100         our @extra_options = @{$input_params{'extra_options'}};
1101         # @extra_options is always defined, since it can only be (currently) set from
1102         # CGI, and $cgi->param() returns the empty array in array context if the param
1103         # is not set
1104         foreach my $opt (@extra_options) {
1105                 if (not exists $allowed_options{$opt}) {
1106                         die_error(400, "Invalid option parameter");
1107                 }
1108                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1109                         die_error(400, "Invalid option parameter for this action");
1110                 }
1111         }
1112
1113         our $hash_parent_base = $input_params{'hash_parent_base'};
1114         if (defined $hash_parent_base) {
1115                 if (!is_valid_refname($hash_parent_base)) {
1116                         die_error(400, "Invalid hash parent base parameter");
1117                 }
1118         }
1119
1120         # other parameters
1121         our $page = $input_params{'page'};
1122         if (defined $page) {
1123                 if ($page =~ m/[^0-9]/) {
1124                         die_error(400, "Invalid page parameter");
1125                 }
1126         }
1127
1128         our $searchtype = $input_params{'searchtype'};
1129         if (defined $searchtype) {
1130                 if ($searchtype =~ m/[^a-z]/) {
1131                         die_error(400, "Invalid searchtype parameter");
1132                 }
1133         }
1134
1135         our $search_use_regexp = $input_params{'search_use_regexp'};
1136
1137         our $searchtext = $input_params{'searchtext'};
1138         our $search_regexp = undef;
1139         if (defined $searchtext) {
1140                 if (length($searchtext) < 2) {
1141                         die_error(403, "At least two characters are required for search parameter");
1142                 }
1143                 if ($search_use_regexp) {
1144                         $search_regexp = $searchtext;
1145                         if (!eval { qr/$search_regexp/; 1; }) {
1146                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1147                                 die_error(400, "Invalid search regexp '$search_regexp'",
1148                                           esc_html($error));
1149                         }
1150                 } else {
1151                         $search_regexp = quotemeta $searchtext;
1152                 }
1153         }
1154 }
1155
1156 # path to the current git repository
1157 our $git_dir;
1158 sub evaluate_git_dir {
1159         our $git_dir = "$projectroot/$project" if $project;
1160 }
1161
1162 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1163 sub configure_gitweb_features {
1164         # list of supported snapshot formats
1165         our @snapshot_fmts = gitweb_get_feature('snapshot');
1166         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1167
1168         # check that the avatar feature is set to a known provider name,
1169         # and for each provider check if the dependencies are satisfied.
1170         # if the provider name is invalid or the dependencies are not met,
1171         # reset $git_avatar to the empty string.
1172         our ($git_avatar) = gitweb_get_feature('avatar');
1173         if ($git_avatar eq 'gravatar') {
1174                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1175         } elsif ($git_avatar eq 'picon') {
1176                 # no dependencies
1177         } else {
1178                 $git_avatar = '';
1179         }
1180
1181         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1182         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1183 }
1184
1185 sub get_branch_refs {
1186         return ('heads', @extra_branch_refs);
1187 }
1188
1189 # custom error handler: 'die <message>' is Internal Server Error
1190 sub handle_errors_html {
1191         my $msg = shift; # it is already HTML escaped
1192
1193         # to avoid infinite loop where error occurs in die_error,
1194         # change handler to default handler, disabling handle_errors_html
1195         set_message("Error occurred when inside die_error:\n$msg");
1196
1197         # you cannot jump out of die_error when called as error handler;
1198         # the subroutine set via CGI::Carp::set_message is called _after_
1199         # HTTP headers are already written, so it cannot write them itself
1200         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1201 }
1202 set_message(\&handle_errors_html);
1203
1204 # dispatch
1205 sub dispatch {
1206         if (!defined $action) {
1207                 if (defined $hash) {
1208                         $action = git_get_type($hash);
1209                         $action or die_error(404, "Object does not exist");
1210                 } elsif (defined $hash_base && defined $file_name) {
1211                         $action = git_get_type("$hash_base:$file_name");
1212                         $action or die_error(404, "File or directory does not exist");
1213                 } elsif (defined $project) {
1214                         $action = 'summary';
1215                 } else {
1216                         $action = 'project_list';
1217                 }
1218         }
1219         if (!defined($actions{$action})) {
1220                 die_error(400, "Unknown action");
1221         }
1222         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1223             !$project) {
1224                 die_error(400, "Project needed");
1225         }
1226         $actions{$action}->();
1227 }
1228
1229 sub reset_timer {
1230         our $t0 = [ gettimeofday() ]
1231                 if defined $t0;
1232         our $number_of_git_cmds = 0;
1233 }
1234
1235 our $first_request = 1;
1236 sub run_request {
1237         reset_timer();
1238
1239         evaluate_uri();
1240         if ($first_request) {
1241                 evaluate_gitweb_config();
1242                 evaluate_git_version();
1243         }
1244         if ($per_request_config) {
1245                 if (ref($per_request_config) eq 'CODE') {
1246                         $per_request_config->();
1247                 } elsif (!$first_request) {
1248                         evaluate_gitweb_config();
1249                 }
1250         }
1251         check_loadavg();
1252
1253         # $projectroot and $projects_list might be set in gitweb config file
1254         $projects_list ||= $projectroot;
1255
1256         evaluate_query_params();
1257         evaluate_path_info();
1258         evaluate_and_validate_params();
1259         evaluate_git_dir();
1260
1261         configure_gitweb_features();
1262
1263         dispatch();
1264 }
1265
1266 our $is_last_request = sub { 1 };
1267 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1268 our $CGI = 'CGI';
1269 our $cgi;
1270 sub configure_as_fcgi {
1271         require CGI::Fast;
1272         our $CGI = 'CGI::Fast';
1273
1274         my $request_number = 0;
1275         # let each child service 100 requests
1276         our $is_last_request = sub { ++$request_number > 100 };
1277 }
1278 sub evaluate_argv {
1279         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1280         configure_as_fcgi()
1281                 if $script_name =~ /\.fcgi$/;
1282
1283         return unless (@ARGV);
1284
1285         require Getopt::Long;
1286         Getopt::Long::GetOptions(
1287                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1288                 'nproc|n=i' => sub {
1289                         my ($arg, $val) = @_;
1290                         return unless eval { require FCGI::ProcManager; 1; };
1291                         my $proc_manager = FCGI::ProcManager->new({
1292                                 n_processes => $val,
1293                         });
1294                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1295                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1296                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1297                 },
1298         );
1299 }
1300
1301 sub run {
1302         evaluate_argv();
1303
1304         $first_request = 1;
1305         $pre_listen_hook->()
1306                 if $pre_listen_hook;
1307
1308  REQUEST:
1309         while ($cgi = $CGI->new()) {
1310                 $pre_dispatch_hook->()
1311                         if $pre_dispatch_hook;
1312
1313                 run_request();
1314
1315                 $post_dispatch_hook->()
1316                         if $post_dispatch_hook;
1317                 $first_request = 0;
1318
1319                 last REQUEST if ($is_last_request->());
1320         }
1321
1322  DONE_GITWEB:
1323         1;
1324 }
1325
1326 run();
1327
1328 if (defined caller) {
1329         # wrapped in a subroutine processing requests,
1330         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1331         return;
1332 } else {
1333         # pure CGI script, serving single request
1334         exit;
1335 }
1336
1337 ## ======================================================================
1338 ## action links
1339
1340 # possible values of extra options
1341 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1342 # -replay => 1      - start from a current view (replay with modifications)
1343 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1344 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1345 sub href {
1346         my %params = @_;
1347         # default is to use -absolute url() i.e. $my_uri
1348         my $href = $params{-full} ? $my_url : $my_uri;
1349
1350         # implicit -replay, must be first of implicit params
1351         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1352
1353         $params{'project'} = $project unless exists $params{'project'};
1354
1355         if ($params{-replay}) {
1356                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1357                         if (!exists $params{$name}) {
1358                                 $params{$name} = $input_params{$name};
1359                         }
1360                 }
1361         }
1362
1363         my $use_pathinfo = gitweb_check_feature('pathinfo');
1364         if (defined $params{'project'} &&
1365             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1366                 # try to put as many parameters as possible in PATH_INFO:
1367                 #   - project name
1368                 #   - action
1369                 #   - hash_parent or hash_parent_base:/file_parent
1370                 #   - hash or hash_base:/filename
1371                 #   - the snapshot_format as an appropriate suffix
1372
1373                 # When the script is the root DirectoryIndex for the domain,
1374                 # $href here would be something like http://gitweb.example.com/
1375                 # Thus, we strip any trailing / from $href, to spare us double
1376                 # slashes in the final URL
1377                 $href =~ s,/$,,;
1378
1379                 # Then add the project name, if present
1380                 $href .= "/".esc_path_info($params{'project'});
1381                 delete $params{'project'};
1382
1383                 # since we destructively absorb parameters, we keep this
1384                 # boolean that remembers if we're handling a snapshot
1385                 my $is_snapshot = $params{'action'} eq 'snapshot';
1386
1387                 # Summary just uses the project path URL, any other action is
1388                 # added to the URL
1389                 if (defined $params{'action'}) {
1390                         $href .= "/".esc_path_info($params{'action'})
1391                                 unless $params{'action'} eq 'summary';
1392                         delete $params{'action'};
1393                 }
1394
1395                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1396                 # stripping nonexistent or useless pieces
1397                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1398                         || $params{'hash_parent'} || $params{'hash'});
1399                 if (defined $params{'hash_base'}) {
1400                         if (defined $params{'hash_parent_base'}) {
1401                                 $href .= esc_path_info($params{'hash_parent_base'});
1402                                 # skip the file_parent if it's the same as the file_name
1403                                 if (defined $params{'file_parent'}) {
1404                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1405                                                 delete $params{'file_parent'};
1406                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1407                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1408                                                 delete $params{'file_parent'};
1409                                         }
1410                                 }
1411                                 $href .= "..";
1412                                 delete $params{'hash_parent'};
1413                                 delete $params{'hash_parent_base'};
1414                         } elsif (defined $params{'hash_parent'}) {
1415                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1416                                 delete $params{'hash_parent'};
1417                         }
1418
1419                         $href .= esc_path_info($params{'hash_base'});
1420                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1421                                 $href .= ":/".esc_path_info($params{'file_name'});
1422                                 delete $params{'file_name'};
1423                         }
1424                         delete $params{'hash'};
1425                         delete $params{'hash_base'};
1426                 } elsif (defined $params{'hash'}) {
1427                         $href .= esc_path_info($params{'hash'});
1428                         delete $params{'hash'};
1429                 }
1430
1431                 # If the action was a snapshot, we can absorb the
1432                 # snapshot_format parameter too
1433                 if ($is_snapshot) {
1434                         my $fmt = $params{'snapshot_format'};
1435                         # snapshot_format should always be defined when href()
1436                         # is called, but just in case some code forgets, we
1437                         # fall back to the default
1438                         $fmt ||= $snapshot_fmts[0];
1439                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1440                         delete $params{'snapshot_format'};
1441                 }
1442         }
1443
1444         # now encode the parameters explicitly
1445         my @result = ();
1446         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1447                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1448                 if (defined $params{$name}) {
1449                         if (ref($params{$name}) eq "ARRAY") {
1450                                 foreach my $par (@{$params{$name}}) {
1451                                         push @result, $symbol . "=" . esc_param($par);
1452                                 }
1453                         } else {
1454                                 push @result, $symbol . "=" . esc_param($params{$name});
1455                         }
1456                 }
1457         }
1458         $href .= "?" . join(';', @result) if scalar @result;
1459
1460         # final transformation: trailing spaces must be escaped (URI-encoded)
1461         $href =~ s/(\s+)$/CGI::escape($1)/e;
1462
1463         if ($params{-anchor}) {
1464                 $href .= "#".esc_param($params{-anchor});
1465         }
1466
1467         return $href;
1468 }
1469
1470
1471 ## ======================================================================
1472 ## validation, quoting/unquoting and escaping
1473
1474 sub is_valid_action {
1475         my $input = shift;
1476         return undef unless exists $actions{$input};
1477         return 1;
1478 }
1479
1480 sub is_valid_project {
1481         my $input = shift;
1482
1483         return unless defined $input;
1484         if (!is_valid_pathname($input) ||
1485                 !(-d "$projectroot/$input") ||
1486                 !check_export_ok("$projectroot/$input") ||
1487                 ($strict_export && !project_in_list($input))) {
1488                 return undef;
1489         } else {
1490                 return 1;
1491         }
1492 }
1493
1494 sub is_valid_pathname {
1495         my $input = shift;
1496
1497         return undef unless defined $input;
1498         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1499         # at the beginning, at the end, and between slashes.
1500         # also this catches doubled slashes
1501         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1502                 return undef;
1503         }
1504         # no null characters
1505         if ($input =~ m!\0!) {
1506                 return undef;
1507         }
1508         return 1;
1509 }
1510
1511 sub is_valid_ref_format {
1512         my $input = shift;
1513
1514         return undef unless defined $input;
1515         # restrictions on ref name according to git-check-ref-format
1516         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1517                 return undef;
1518         }
1519         return 1;
1520 }
1521
1522 sub is_valid_refname {
1523         my $input = shift;
1524
1525         return undef unless defined $input;
1526         # textual hashes are O.K.
1527         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1528                 return 1;
1529         }
1530         # it must be correct pathname
1531         is_valid_pathname($input) or return undef;
1532         # check git-check-ref-format restrictions
1533         is_valid_ref_format($input) or return undef;
1534         return 1;
1535 }
1536
1537 # decode sequences of octets in utf8 into Perl's internal form,
1538 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1539 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1540 sub to_utf8 {
1541         my $str = shift;
1542         return undef unless defined $str;
1543
1544         if (utf8::is_utf8($str) || utf8::decode($str)) {
1545                 return $str;
1546         } else {
1547                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1548         }
1549 }
1550
1551 # quote unsafe chars, but keep the slash, even when it's not
1552 # correct, but quoted slashes look too horrible in bookmarks
1553 sub esc_param {
1554         my $str = shift;
1555         return undef unless defined $str;
1556         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1557         $str =~ s/ /\+/g;
1558         return $str;
1559 }
1560
1561 # the quoting rules for path_info fragment are slightly different
1562 sub esc_path_info {
1563         my $str = shift;
1564         return undef unless defined $str;
1565
1566         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1567         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1568
1569         return $str;
1570 }
1571
1572 # quote unsafe chars in whole URL, so some characters cannot be quoted
1573 sub esc_url {
1574         my $str = shift;
1575         return undef unless defined $str;
1576         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1577         $str =~ s/ /\+/g;
1578         return $str;
1579 }
1580
1581 # quote unsafe characters in HTML attributes
1582 sub esc_attr {
1583
1584         # for XHTML conformance escaping '"' to '&quot;' is not enough
1585         return esc_html(@_);
1586 }
1587
1588 # replace invalid utf8 character with SUBSTITUTION sequence
1589 sub esc_html {
1590         my $str = shift;
1591         my %opts = @_;
1592
1593         return undef unless defined $str;
1594
1595         $str = to_utf8($str);
1596         $str = $cgi->escapeHTML($str);
1597         if ($opts{'-nbsp'}) {
1598                 $str =~ s/ /&nbsp;/g;
1599         }
1600         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1601         return $str;
1602 }
1603
1604 # quote control characters and escape filename to HTML
1605 sub esc_path {
1606         my $str = shift;
1607         my %opts = @_;
1608
1609         return undef unless defined $str;
1610
1611         $str = to_utf8($str);
1612         $str = $cgi->escapeHTML($str);
1613         if ($opts{'-nbsp'}) {
1614                 $str =~ s/ /&nbsp;/g;
1615         }
1616         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1617         return $str;
1618 }
1619
1620 # Sanitize for use in XHTML + application/xml+xhtm (valid XML 1.0)
1621 sub sanitize {
1622         my $str = shift;
1623
1624         return undef unless defined $str;
1625
1626         $str = to_utf8($str);
1627         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1628         return $str;
1629 }
1630
1631 # Make control characters "printable", using character escape codes (CEC)
1632 sub quot_cec {
1633         my $cntrl = shift;
1634         my %opts = @_;
1635         my %es = ( # character escape codes, aka escape sequences
1636                 "\t" => '\t',   # tab            (HT)
1637                 "\n" => '\n',   # line feed      (LF)
1638                 "\r" => '\r',   # carrige return (CR)
1639                 "\f" => '\f',   # form feed      (FF)
1640                 "\b" => '\b',   # backspace      (BS)
1641                 "\a" => '\a',   # alarm (bell)   (BEL)
1642                 "\e" => '\e',   # escape         (ESC)
1643                 "\013" => '\v', # vertical tab   (VT)
1644                 "\000" => '\0', # nul character  (NUL)
1645         );
1646         my $chr = ( (exists $es{$cntrl})
1647                     ? $es{$cntrl}
1648                     : sprintf('\%2x', ord($cntrl)) );
1649         if ($opts{-nohtml}) {
1650                 return $chr;
1651         } else {
1652                 return "<span class=\"cntrl\">$chr</span>";
1653         }
1654 }
1655
1656 # Alternatively use unicode control pictures codepoints,
1657 # Unicode "printable representation" (PR)
1658 sub quot_upr {
1659         my $cntrl = shift;
1660         my %opts = @_;
1661
1662         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1663         if ($opts{-nohtml}) {
1664                 return $chr;
1665         } else {
1666                 return "<span class=\"cntrl\">$chr</span>";
1667         }
1668 }
1669
1670 # git may return quoted and escaped filenames
1671 sub unquote {
1672         my $str = shift;
1673
1674         sub unq {
1675                 my $seq = shift;
1676                 my %es = ( # character escape codes, aka escape sequences
1677                         't' => "\t",   # tab            (HT, TAB)
1678                         'n' => "\n",   # newline        (NL)
1679                         'r' => "\r",   # return         (CR)
1680                         'f' => "\f",   # form feed      (FF)
1681                         'b' => "\b",   # backspace      (BS)
1682                         'a' => "\a",   # alarm (bell)   (BEL)
1683                         'e' => "\e",   # escape         (ESC)
1684                         'v' => "\013", # vertical tab   (VT)
1685                 );
1686
1687                 if ($seq =~ m/^[0-7]{1,3}$/) {
1688                         # octal char sequence
1689                         return chr(oct($seq));
1690                 } elsif (exists $es{$seq}) {
1691                         # C escape sequence, aka character escape code
1692                         return $es{$seq};
1693                 }
1694                 # quoted ordinary character
1695                 return $seq;
1696         }
1697
1698         if ($str =~ m/^"(.*)"$/) {
1699                 # needs unquoting
1700                 $str = $1;
1701                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1702         }
1703         return $str;
1704 }
1705
1706 # escape tabs (convert tabs to spaces)
1707 sub untabify {
1708         my $line = shift;
1709
1710         while ((my $pos = index($line, "\t")) != -1) {
1711                 if (my $count = (8 - ($pos % 8))) {
1712                         my $spaces = ' ' x $count;
1713                         $line =~ s/\t/$spaces/;
1714                 }
1715         }
1716
1717         return $line;
1718 }
1719
1720 sub project_in_list {
1721         my $project = shift;
1722         my @list = git_get_projects_list();
1723         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1724 }
1725
1726 ## ----------------------------------------------------------------------
1727 ## HTML aware string manipulation
1728
1729 # Try to chop given string on a word boundary between position
1730 # $len and $len+$add_len. If there is no word boundary there,
1731 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1732 # (marking chopped part) would be longer than given string.
1733 sub chop_str {
1734         my $str = shift;
1735         my $len = shift;
1736         my $add_len = shift || 10;
1737         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1738
1739         # Make sure perl knows it is utf8 encoded so we don't
1740         # cut in the middle of a utf8 multibyte char.
1741         $str = to_utf8($str);
1742
1743         # allow only $len chars, but don't cut a word if it would fit in $add_len
1744         # if it doesn't fit, cut it if it's still longer than the dots we would add
1745         # remove chopped character entities entirely
1746
1747         # when chopping in the middle, distribute $len into left and right part
1748         # return early if chopping wouldn't make string shorter
1749         if ($where eq 'center') {
1750                 return $str if ($len + 5 >= length($str)); # filler is length 5
1751                 $len = int($len/2);
1752         } else {
1753                 return $str if ($len + 4 >= length($str)); # filler is length 4
1754         }
1755
1756         # regexps: ending and beginning with word part up to $add_len
1757         my $endre = qr/.{$len}\w{0,$add_len}/;
1758         my $begre = qr/\w{0,$add_len}.{$len}/;
1759
1760         if ($where eq 'left') {
1761                 $str =~ m/^(.*?)($begre)$/;
1762                 my ($lead, $body) = ($1, $2);
1763                 if (length($lead) > 4) {
1764                         $lead = " ...";
1765                 }
1766                 return "$lead$body";
1767
1768         } elsif ($where eq 'center') {
1769                 $str =~ m/^($endre)(.*)$/;
1770                 my ($left, $str)  = ($1, $2);
1771                 $str =~ m/^(.*?)($begre)$/;
1772                 my ($mid, $right) = ($1, $2);
1773                 if (length($mid) > 5) {
1774                         $mid = " ... ";
1775                 }
1776                 return "$left$mid$right";
1777
1778         } else {
1779                 $str =~ m/^($endre)(.*)$/;
1780                 my $body = $1;
1781                 my $tail = $2;
1782                 if (length($tail) > 4) {
1783                         $tail = "... ";
1784                 }
1785                 return "$body$tail";
1786         }
1787 }
1788
1789 # takes the same arguments as chop_str, but also wraps a <span> around the
1790 # result with a title attribute if it does get chopped. Additionally, the
1791 # string is HTML-escaped.
1792 sub chop_and_escape_str {
1793         my ($str) = @_;
1794
1795         my $chopped = chop_str(@_);
1796         $str = to_utf8($str);
1797         if ($chopped eq $str) {
1798                 return esc_html($chopped);
1799         } else {
1800                 $str =~ s/[[:cntrl:]]/?/g;
1801                 return $cgi->span({-title=>$str}, esc_html($chopped));
1802         }
1803 }
1804
1805 # Highlight selected fragments of string, using given CSS class,
1806 # and escape HTML.  It is assumed that fragments do not overlap.
1807 # Regions are passed as list of pairs (array references).
1808 #
1809 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1810 # '<span class="mark">foo</span>bar'
1811 sub esc_html_hl_regions {
1812         my ($str, $css_class, @sel) = @_;
1813         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1814         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1815         return esc_html($str, %opts) unless @sel;
1816
1817         my $out = '';
1818         my $pos = 0;
1819
1820         for my $s (@sel) {
1821                 my ($begin, $end) = @$s;
1822
1823                 # Don't create empty <span> elements.
1824                 next if $end <= $begin;
1825
1826                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1827                                        %opts);
1828
1829                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1830                         if ($begin - $pos > 0);
1831                 $out .= $cgi->span({-class => $css_class}, $escaped);
1832
1833                 $pos = $end;
1834         }
1835         $out .= esc_html(substr($str, $pos), %opts)
1836                 if ($pos < length($str));
1837
1838         return $out;
1839 }
1840
1841 # return positions of beginning and end of each match
1842 sub matchpos_list {
1843         my ($str, $regexp) = @_;
1844         return unless (defined $str && defined $regexp);
1845
1846         my @matches;
1847         while ($str =~ /$regexp/g) {
1848                 push @matches, [$-[0], $+[0]];
1849         }
1850         return @matches;
1851 }
1852
1853 # highlight match (if any), and escape HTML
1854 sub esc_html_match_hl {
1855         my ($str, $regexp) = @_;
1856         return esc_html($str) unless defined $regexp;
1857
1858         my @matches = matchpos_list($str, $regexp);
1859         return esc_html($str) unless @matches;
1860
1861         return esc_html_hl_regions($str, 'match', @matches);
1862 }
1863
1864
1865 # highlight match (if any) of shortened string, and escape HTML
1866 sub esc_html_match_hl_chopped {
1867         my ($str, $chopped, $regexp) = @_;
1868         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1869
1870         my @matches = matchpos_list($str, $regexp);
1871         return esc_html($chopped) unless @matches;
1872
1873         # filter matches so that we mark chopped string
1874         my $tail = "... "; # see chop_str
1875         unless ($chopped =~ s/\Q$tail\E$//) {
1876                 $tail = '';
1877         }
1878         my $chop_len = length($chopped);
1879         my $tail_len = length($tail);
1880         my @filtered;
1881
1882         for my $m (@matches) {
1883                 if ($m->[0] > $chop_len) {
1884                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1885                         last;
1886                 } elsif ($m->[1] > $chop_len) {
1887                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1888                         last;
1889                 }
1890                 push @filtered, $m;
1891         }
1892
1893         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1894 }
1895
1896 ## ----------------------------------------------------------------------
1897 ## functions returning short strings
1898
1899 # CSS class for given age value (in seconds)
1900 sub age_class {
1901         my $age = shift;
1902
1903         if (!defined $age) {
1904                 return "noage";
1905         } elsif ($age < 60*60*2) {
1906                 return "age0";
1907         } elsif ($age < 60*60*24*2) {
1908                 return "age1";
1909         } else {
1910                 return "age2";
1911         }
1912 }
1913
1914 # convert age in seconds to "nn units ago" string
1915 sub age_string {
1916         my $age = shift;
1917         my $age_str;
1918
1919         if ($age > 60*60*24*365*2) {
1920                 $age_str = (int $age/60/60/24/365);
1921                 $age_str .= " years ago";
1922         } elsif ($age > 60*60*24*(365/12)*2) {
1923                 $age_str = int $age/60/60/24/(365/12);
1924                 $age_str .= " months ago";
1925         } elsif ($age > 60*60*24*7*2) {
1926                 $age_str = int $age/60/60/24/7;
1927                 $age_str .= " weeks ago";
1928         } elsif ($age > 60*60*24*2) {
1929                 $age_str = int $age/60/60/24;
1930                 $age_str .= " days ago";
1931         } elsif ($age > 60*60*2) {
1932                 $age_str = int $age/60/60;
1933                 $age_str .= " hours ago";
1934         } elsif ($age > 60*2) {
1935                 $age_str = int $age/60;
1936                 $age_str .= " min ago";
1937         } elsif ($age > 2) {
1938                 $age_str = int $age;
1939                 $age_str .= " sec ago";
1940         } else {
1941                 $age_str .= " right now";
1942         }
1943         return $age_str;
1944 }
1945
1946 use constant {
1947         S_IFINVALID => 0030000,
1948         S_IFGITLINK => 0160000,
1949 };
1950
1951 # submodule/subproject, a commit object reference
1952 sub S_ISGITLINK {
1953         my $mode = shift;
1954
1955         return (($mode & S_IFMT) == S_IFGITLINK)
1956 }
1957
1958 # convert file mode in octal to symbolic file mode string
1959 sub mode_str {
1960         my $mode = oct shift;
1961
1962         if (S_ISGITLINK($mode)) {
1963                 return 'm---------';
1964         } elsif (S_ISDIR($mode & S_IFMT)) {
1965                 return 'drwxr-xr-x';
1966         } elsif (S_ISLNK($mode)) {
1967                 return 'lrwxrwxrwx';
1968         } elsif (S_ISREG($mode)) {
1969                 # git cares only about the executable bit
1970                 if ($mode & S_IXUSR) {
1971                         return '-rwxr-xr-x';
1972                 } else {
1973                         return '-rw-r--r--';
1974                 };
1975         } else {
1976                 return '----------';
1977         }
1978 }
1979
1980 # convert file mode in octal to file type string
1981 sub file_type {
1982         my $mode = shift;
1983
1984         if ($mode !~ m/^[0-7]+$/) {
1985                 return $mode;
1986         } else {
1987                 $mode = oct $mode;
1988         }
1989
1990         if (S_ISGITLINK($mode)) {
1991                 return "submodule";
1992         } elsif (S_ISDIR($mode & S_IFMT)) {
1993                 return "directory";
1994         } elsif (S_ISLNK($mode)) {
1995                 return "symlink";
1996         } elsif (S_ISREG($mode)) {
1997                 return "file";
1998         } else {
1999                 return "unknown";
2000         }
2001 }
2002
2003 # convert file mode in octal to file type description string
2004 sub file_type_long {
2005         my $mode = shift;
2006
2007         if ($mode !~ m/^[0-7]+$/) {
2008                 return $mode;
2009         } else {
2010                 $mode = oct $mode;
2011         }
2012
2013         if (S_ISGITLINK($mode)) {
2014                 return "submodule";
2015         } elsif (S_ISDIR($mode & S_IFMT)) {
2016                 return "directory";
2017         } elsif (S_ISLNK($mode)) {
2018                 return "symlink";
2019         } elsif (S_ISREG($mode)) {
2020                 if ($mode & S_IXUSR) {
2021                         return "executable";
2022                 } else {
2023                         return "file";
2024                 };
2025         } else {
2026                 return "unknown";
2027         }
2028 }
2029
2030
2031 ## ----------------------------------------------------------------------
2032 ## functions returning short HTML fragments, or transforming HTML fragments
2033 ## which don't belong to other sections
2034
2035 # format line of commit message.
2036 sub format_log_line_html {
2037         my $line = shift;
2038
2039         $line = esc_html($line, -nbsp=>1);
2040         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
2041                 $cgi->a({-href => href(action=>"object", hash=>$1),
2042                                         -class => "text"}, $1);
2043         }eg;
2044
2045         return $line;
2046 }
2047
2048 # format marker of refs pointing to given object
2049
2050 # the destination action is chosen based on object type and current context:
2051 # - for annotated tags, we choose the tag view unless it's the current view
2052 #   already, in which case we go to shortlog view
2053 # - for other refs, we keep the current view if we're in history, shortlog or
2054 #   log view, and select shortlog otherwise
2055 sub format_ref_marker {
2056         my ($refs, $id) = @_;
2057         my $markers = '';
2058
2059         if (defined $refs->{$id}) {
2060                 foreach my $ref (@{$refs->{$id}}) {
2061                         # this code exploits the fact that non-lightweight tags are the
2062                         # only indirect objects, and that they are the only objects for which
2063                         # we want to use tag instead of shortlog as action
2064                         my ($type, $name) = qw();
2065                         my $indirect = ($ref =~ s/\^\{\}$//);
2066                         # e.g. tags/v2.6.11 or heads/next
2067                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2068                                 $type = $1;
2069                                 $name = $2;
2070                         } else {
2071                                 $type = "ref";
2072                                 $name = $ref;
2073                         }
2074
2075                         my $class = $type;
2076                         $class .= " indirect" if $indirect;
2077
2078                         my $dest_action = "shortlog";
2079
2080                         if ($indirect) {
2081                                 $dest_action = "tag" unless $action eq "tag";
2082                         } elsif ($action =~ /^(history|(short)?log)$/) {
2083                                 $dest_action = $action;
2084                         }
2085
2086                         my $dest = "";
2087                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2088                         $dest .= $ref;
2089
2090                         my $link = $cgi->a({
2091                                 -href => href(
2092                                         action=>$dest_action,
2093                                         hash=>$dest
2094                                 )}, esc_html($name));
2095
2096                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2097                                 $link . "</span>";
2098                 }
2099         }
2100
2101         if ($markers) {
2102                 return ' <span class="refs">'. $markers . '</span>';
2103         } else {
2104                 return "";
2105         }
2106 }
2107
2108 # format, perhaps shortened and with markers, title line
2109 sub format_subject_html {
2110         my ($long, $short, $href, $extra) = @_;
2111         $extra = '' unless defined($extra);
2112
2113         if (length($short) < length($long)) {
2114                 $long =~ s/[[:cntrl:]]/?/g;
2115                 return $cgi->a({-href => $href, -class => "list subject",
2116                                 -title => to_utf8($long)},
2117                        esc_html($short)) . $extra;
2118         } else {
2119                 return $cgi->a({-href => $href, -class => "list subject"},
2120                        esc_html($long)) . $extra;
2121         }
2122 }
2123
2124 # Rather than recomputing the url for an email multiple times, we cache it
2125 # after the first hit. This gives a visible benefit in views where the avatar
2126 # for the same email is used repeatedly (e.g. shortlog).
2127 # The cache is shared by all avatar engines (currently gravatar only), which
2128 # are free to use it as preferred. Since only one avatar engine is used for any
2129 # given page, there's no risk for cache conflicts.
2130 our %avatar_cache = ();
2131
2132 # Compute the picon url for a given email, by using the picon search service over at
2133 # http://www.cs.indiana.edu/picons/search.html
2134 sub picon_url {
2135         my $email = lc shift;
2136         if (!$avatar_cache{$email}) {
2137                 my ($user, $domain) = split('@', $email);
2138                 $avatar_cache{$email} =
2139                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2140                         "$domain/$user/" .
2141                         "users+domains+unknown/up/single";
2142         }
2143         return $avatar_cache{$email};
2144 }
2145
2146 # Compute the gravatar url for a given email, if it's not in the cache already.
2147 # Gravatar stores only the part of the URL before the size, since that's the
2148 # one computationally more expensive. This also allows reuse of the cache for
2149 # different sizes (for this particular engine).
2150 sub gravatar_url {
2151         my $email = lc shift;
2152         my $size = shift;
2153         $avatar_cache{$email} ||=
2154                 "//www.gravatar.com/avatar/" .
2155                         Digest::MD5::md5_hex($email) . "?s=";
2156         return $avatar_cache{$email} . $size;
2157 }
2158
2159 # Insert an avatar for the given $email at the given $size if the feature
2160 # is enabled.
2161 sub git_get_avatar {
2162         my ($email, %opts) = @_;
2163         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2164         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2165         $opts{-size} ||= 'default';
2166         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2167         my $url = "";
2168         if ($git_avatar eq 'gravatar') {
2169                 $url = gravatar_url($email, $size);
2170         } elsif ($git_avatar eq 'picon') {
2171                 $url = picon_url($email);
2172         }
2173         # Other providers can be added by extending the if chain, defining $url
2174         # as needed. If no variant puts something in $url, we assume avatars
2175         # are completely disabled/unavailable.
2176         if ($url) {
2177                 return $pre_white .
2178                        "<img width=\"$size\" " .
2179                             "class=\"avatar\" " .
2180                             "src=\"".esc_url($url)."\" " .
2181                             "alt=\"\" " .
2182                        "/>" . $post_white;
2183         } else {
2184                 return "";
2185         }
2186 }
2187
2188 sub format_search_author {
2189         my ($author, $searchtype, $displaytext) = @_;
2190         my $have_search = gitweb_check_feature('search');
2191
2192         if ($have_search) {
2193                 my $performed = "";
2194                 if ($searchtype eq 'author') {
2195                         $performed = "authored";
2196                 } elsif ($searchtype eq 'committer') {
2197                         $performed = "committed";
2198                 }
2199
2200                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2201                                 searchtext=>$author,
2202                                 searchtype=>$searchtype), class=>"list",
2203                                 title=>"Search for commits $performed by $author"},
2204                                 $displaytext);
2205
2206         } else {
2207                 return $displaytext;
2208         }
2209 }
2210
2211 # format the author name of the given commit with the given tag
2212 # the author name is chopped and escaped according to the other
2213 # optional parameters (see chop_str).
2214 sub format_author_html {
2215         my $tag = shift;
2216         my $co = shift;
2217         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2218         return "<$tag class=\"author\">" .
2219                format_search_author($co->{'author_name'}, "author",
2220                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2221                        $author) .
2222                "</$tag>";
2223 }
2224
2225 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2226 sub format_git_diff_header_line {
2227         my $line = shift;
2228         my $diffinfo = shift;
2229         my ($from, $to) = @_;
2230
2231         if ($diffinfo->{'nparents'}) {
2232                 # combined diff
2233                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2234                 if ($to->{'href'}) {
2235                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2236                                          esc_path($to->{'file'}));
2237                 } else { # file was deleted (no href)
2238                         $line .= esc_path($to->{'file'});
2239                 }
2240         } else {
2241                 # "ordinary" diff
2242                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2243                 if ($from->{'href'}) {
2244                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2245                                          'a/' . esc_path($from->{'file'}));
2246                 } else { # file was added (no href)
2247                         $line .= 'a/' . esc_path($from->{'file'});
2248                 }
2249                 $line .= ' ';
2250                 if ($to->{'href'}) {
2251                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2252                                          'b/' . esc_path($to->{'file'}));
2253                 } else { # file was deleted
2254                         $line .= 'b/' . esc_path($to->{'file'});
2255                 }
2256         }
2257
2258         return "<div class=\"diff header\">$line</div>\n";
2259 }
2260
2261 # format extended diff header line, before patch itself
2262 sub format_extended_diff_header_line {
2263         my $line = shift;
2264         my $diffinfo = shift;
2265         my ($from, $to) = @_;
2266
2267         # match <path>
2268         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2269                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2270                                        esc_path($from->{'file'}));
2271         }
2272         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2273                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2274                                  esc_path($to->{'file'}));
2275         }
2276         # match single <mode>
2277         if ($line =~ m/\s(\d{6})$/) {
2278                 $line .= '<span class="info"> (' .
2279                          file_type_long($1) .
2280                          ')</span>';
2281         }
2282         # match <hash>
2283         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2284                 # can match only for combined diff
2285                 $line = 'index ';
2286                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2287                         if ($from->{'href'}[$i]) {
2288                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2289                                                   -class=>"hash"},
2290                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2291                         } else {
2292                                 $line .= '0' x 7;
2293                         }
2294                         # separator
2295                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2296                 }
2297                 $line .= '..';
2298                 if ($to->{'href'}) {
2299                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2300                                          substr($diffinfo->{'to_id'},0,7));
2301                 } else {
2302                         $line .= '0' x 7;
2303                 }
2304
2305         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2306                 # can match only for ordinary diff
2307                 my ($from_link, $to_link);
2308                 if ($from->{'href'}) {
2309                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2310                                              substr($diffinfo->{'from_id'},0,7));
2311                 } else {
2312                         $from_link = '0' x 7;
2313                 }
2314                 if ($to->{'href'}) {
2315                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2316                                            substr($diffinfo->{'to_id'},0,7));
2317                 } else {
2318                         $to_link = '0' x 7;
2319                 }
2320                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2321                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2322         }
2323
2324         return $line . "<br/>\n";
2325 }
2326
2327 # format from-file/to-file diff header
2328 sub format_diff_from_to_header {
2329         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2330         my $line;
2331         my $result = '';
2332
2333         $line = $from_line;
2334         #assert($line =~ m/^---/) if DEBUG;
2335         # no extra formatting for "^--- /dev/null"
2336         if (! $diffinfo->{'nparents'}) {
2337                 # ordinary (single parent) diff
2338                 if ($line =~ m!^--- "?a/!) {
2339                         if ($from->{'href'}) {
2340                                 $line = '--- a/' .
2341                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2342                                                 esc_path($from->{'file'}));
2343                         } else {
2344                                 $line = '--- a/' .
2345                                         esc_path($from->{'file'});
2346                         }
2347                 }
2348                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2349
2350         } else {
2351                 # combined diff (merge commit)
2352                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2353                         if ($from->{'href'}[$i]) {
2354                                 $line = '--- ' .
2355                                         $cgi->a({-href=>href(action=>"blobdiff",
2356                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2357                                                              hash_parent_base=>$parents[$i],
2358                                                              file_parent=>$from->{'file'}[$i],
2359                                                              hash=>$diffinfo->{'to_id'},
2360                                                              hash_base=>$hash,
2361                                                              file_name=>$to->{'file'}),
2362                                                  -class=>"path",
2363                                                  -title=>"diff" . ($i+1)},
2364                                                 $i+1) .
2365                                         '/' .
2366                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2367                                                 esc_path($from->{'file'}[$i]));
2368                         } else {
2369                                 $line = '--- /dev/null';
2370                         }
2371                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2372                 }
2373         }
2374
2375         $line = $to_line;
2376         #assert($line =~ m/^\+\+\+/) if DEBUG;
2377         # no extra formatting for "^+++ /dev/null"
2378         if ($line =~ m!^\+\+\+ "?b/!) {
2379                 if ($to->{'href'}) {
2380                         $line = '+++ b/' .
2381                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2382                                         esc_path($to->{'file'}));
2383                 } else {
2384                         $line = '+++ b/' .
2385                                 esc_path($to->{'file'});
2386                 }
2387         }
2388         $result .= qq!<div class="diff to_file">$line</div>\n!;
2389
2390         return $result;
2391 }
2392
2393 # create note for patch simplified by combined diff
2394 sub format_diff_cc_simplified {
2395         my ($diffinfo, @parents) = @_;
2396         my $result = '';
2397
2398         $result .= "<div class=\"diff header\">" .
2399                    "diff --cc ";
2400         if (!is_deleted($diffinfo)) {
2401                 $result .= $cgi->a({-href => href(action=>"blob",
2402                                                   hash_base=>$hash,
2403                                                   hash=>$diffinfo->{'to_id'},
2404                                                   file_name=>$diffinfo->{'to_file'}),
2405                                     -class => "path"},
2406                                    esc_path($diffinfo->{'to_file'}));
2407         } else {
2408                 $result .= esc_path($diffinfo->{'to_file'});
2409         }
2410         $result .= "</div>\n" . # class="diff header"
2411                    "<div class=\"diff nodifferences\">" .
2412                    "Simple merge" .
2413                    "</div>\n"; # class="diff nodifferences"
2414
2415         return $result;
2416 }
2417
2418 sub diff_line_class {
2419         my ($line, $from, $to) = @_;
2420
2421         # ordinary diff
2422         my $num_sign = 1;
2423         # combined diff
2424         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2425                 $num_sign = scalar @{$from->{'href'}};
2426         }
2427
2428         my @diff_line_classifier = (
2429                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2430                 { regexp => qr/^\\/,               class => "incomplete"  },
2431                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2432                 # classifier for context must come before classifier add/rem,
2433                 # or we would have to use more complicated regexp, for example
2434                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2435                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2436                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2437         );
2438         for my $clsfy (@diff_line_classifier) {
2439                 return $clsfy->{'class'}
2440                         if ($line =~ $clsfy->{'regexp'});
2441         }
2442
2443         # fallback
2444         return "";
2445 }
2446
2447 # assumes that $from and $to are defined and correctly filled,
2448 # and that $line holds a line of chunk header for unified diff
2449 sub format_unidiff_chunk_header {
2450         my ($line, $from, $to) = @_;
2451
2452         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2453                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2454
2455         $from_lines = 0 unless defined $from_lines;
2456         $to_lines   = 0 unless defined $to_lines;
2457
2458         if ($from->{'href'}) {
2459                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2460                                      -class=>"list"}, $from_text);
2461         }
2462         if ($to->{'href'}) {
2463                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2464                                      -class=>"list"}, $to_text);
2465         }
2466         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2467                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2468         return $line;
2469 }
2470
2471 # assumes that $from and $to are defined and correctly filled,
2472 # and that $line holds a line of chunk header for combined diff
2473 sub format_cc_diff_chunk_header {
2474         my ($line, $from, $to) = @_;
2475
2476         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2477         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2478
2479         @from_text = split(' ', $ranges);
2480         for (my $i = 0; $i < @from_text; ++$i) {
2481                 ($from_start[$i], $from_nlines[$i]) =
2482                         (split(',', substr($from_text[$i], 1)), 0);
2483         }
2484
2485         $to_text   = pop @from_text;
2486         $to_start  = pop @from_start;
2487         $to_nlines = pop @from_nlines;
2488
2489         $line = "<span class=\"chunk_info\">$prefix ";
2490         for (my $i = 0; $i < @from_text; ++$i) {
2491                 if ($from->{'href'}[$i]) {
2492                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2493                                           -class=>"list"}, $from_text[$i]);
2494                 } else {
2495                         $line .= $from_text[$i];
2496                 }
2497                 $line .= " ";
2498         }
2499         if ($to->{'href'}) {
2500                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2501                                   -class=>"list"}, $to_text);
2502         } else {
2503                 $line .= $to_text;
2504         }
2505         $line .= " $prefix</span>" .
2506                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2507         return $line;
2508 }
2509
2510 # process patch (diff) line (not to be used for diff headers),
2511 # returning HTML-formatted (but not wrapped) line.
2512 # If the line is passed as a reference, it is treated as HTML and not
2513 # esc_html()'ed.
2514 sub format_diff_line {
2515         my ($line, $diff_class, $from, $to) = @_;
2516
2517         if (ref($line)) {
2518                 $line = $$line;
2519         } else {
2520                 chomp $line;
2521                 $line = untabify($line);
2522
2523                 if ($from && $to && $line =~ m/^\@{2} /) {
2524                         $line = format_unidiff_chunk_header($line, $from, $to);
2525                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2526                         $line = format_cc_diff_chunk_header($line, $from, $to);
2527                 } else {
2528                         $line = esc_html($line, -nbsp=>1);
2529                 }
2530         }
2531
2532         my $diff_classes = "diff";
2533         $diff_classes .= " $diff_class" if ($diff_class);
2534         $line = "<div class=\"$diff_classes\">$line</div>\n";
2535
2536         return $line;
2537 }
2538
2539 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2540 # linked.  Pass the hash of the tree/commit to snapshot.
2541 sub format_snapshot_links {
2542         my ($hash) = @_;
2543         my $num_fmts = @snapshot_fmts;
2544         if ($num_fmts > 1) {
2545                 # A parenthesized list of links bearing format names.
2546                 # e.g. "snapshot (_tar.gz_ _zip_)"
2547                 return "snapshot (" . join(' ', map
2548                         $cgi->a({
2549                                 -href => href(
2550                                         action=>"snapshot",
2551                                         hash=>$hash,
2552                                         snapshot_format=>$_
2553                                 )
2554                         }, $known_snapshot_formats{$_}{'display'})
2555                 , @snapshot_fmts) . ")";
2556         } elsif ($num_fmts == 1) {
2557                 # A single "snapshot" link whose tooltip bears the format name.
2558                 # i.e. "_snapshot_"
2559                 my ($fmt) = @snapshot_fmts;
2560                 return
2561                         $cgi->a({
2562                                 -href => href(
2563                                         action=>"snapshot",
2564                                         hash=>$hash,
2565                                         snapshot_format=>$fmt
2566                                 ),
2567                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2568                         }, "snapshot");
2569         } else { # $num_fmts == 0
2570                 return undef;
2571         }
2572 }
2573
2574 ## ......................................................................
2575 ## functions returning values to be passed, perhaps after some
2576 ## transformation, to other functions; e.g. returning arguments to href()
2577
2578 # returns hash to be passed to href to generate gitweb URL
2579 # in -title key it returns description of link
2580 sub get_feed_info {
2581         my $format = shift || 'Atom';
2582         my %res = (action => lc($format));
2583         my $matched_ref = 0;
2584
2585         # feed links are possible only for project views
2586         return unless (defined $project);
2587         # some views should link to OPML, or to generic project feed,
2588         # or don't have specific feed yet (so they should use generic)
2589         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2590
2591         my $branch = undef;
2592         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2593         # (fullname) to differentiate from tag links; this also makes
2594         # possible to detect branch links
2595         for my $ref (get_branch_refs()) {
2596                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2597                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2598                         $branch = $1;
2599                         $matched_ref = $ref;
2600                         last;
2601                 }
2602         }
2603         # find log type for feed description (title)
2604         my $type = 'log';
2605         if (defined $file_name) {
2606                 $type  = "history of $file_name";
2607                 $type .= "/" if ($action eq 'tree');
2608                 $type .= " on '$branch'" if (defined $branch);
2609         } else {
2610                 $type = "log of $branch" if (defined $branch);
2611         }
2612
2613         $res{-title} = $type;
2614         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2615         $res{'file_name'} = $file_name;
2616
2617         return %res;
2618 }
2619
2620 ## ----------------------------------------------------------------------
2621 ## git utility subroutines, invoking git commands
2622
2623 # returns path to the core git executable and the --git-dir parameter as list
2624 sub git_cmd {
2625         $number_of_git_cmds++;
2626         return $GIT, '--git-dir='.$git_dir;
2627 }
2628
2629 # quote the given arguments for passing them to the shell
2630 # quote_command("command", "arg 1", "arg with ' and ! characters")
2631 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2632 # Try to avoid using this function wherever possible.
2633 sub quote_command {
2634         return join(' ',
2635                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2636 }
2637
2638 # get HEAD ref of given project as hash
2639 sub git_get_head_hash {
2640         return git_get_full_hash(shift, 'HEAD');
2641 }
2642
2643 sub git_get_full_hash {
2644         return git_get_hash(@_);
2645 }
2646
2647 sub git_get_short_hash {
2648         return git_get_hash(@_, '--short=7');
2649 }
2650
2651 sub git_get_hash {
2652         my ($project, $hash, @options) = @_;
2653         my $o_git_dir = $git_dir;
2654         my $retval = undef;
2655         $git_dir = "$projectroot/$project";
2656         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2657             '--verify', '-q', @options, $hash) {
2658                 $retval = <$fd>;
2659                 chomp $retval if defined $retval;
2660                 close $fd;
2661         }
2662         if (defined $o_git_dir) {
2663                 $git_dir = $o_git_dir;
2664         }
2665         return $retval;
2666 }
2667
2668 # get type of given object
2669 sub git_get_type {
2670         my $hash = shift;
2671
2672         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2673         my $type = <$fd>;
2674         close $fd or return;
2675         chomp $type;
2676         return $type;
2677 }
2678
2679 # repository configuration
2680 our $config_file = '';
2681 our %config;
2682
2683 # store multiple values for single key as anonymous array reference
2684 # single values stored directly in the hash, not as [ <value> ]
2685 sub hash_set_multi {
2686         my ($hash, $key, $value) = @_;
2687
2688         if (!exists $hash->{$key}) {
2689                 $hash->{$key} = $value;
2690         } elsif (!ref $hash->{$key}) {
2691                 $hash->{$key} = [ $hash->{$key}, $value ];
2692         } else {
2693                 push @{$hash->{$key}}, $value;
2694         }
2695 }
2696
2697 # return hash of git project configuration
2698 # optionally limited to some section, e.g. 'gitweb'
2699 sub git_parse_project_config {
2700         my $section_regexp = shift;
2701         my %config;
2702
2703         local $/ = "\0";
2704
2705         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2706                 or return;
2707
2708         while (my $keyval = <$fh>) {
2709                 chomp $keyval;
2710                 my ($key, $value) = split(/\n/, $keyval, 2);
2711
2712                 hash_set_multi(\%config, $key, $value)
2713                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2714         }
2715         close $fh;
2716
2717         return %config;
2718 }
2719
2720 # convert config value to boolean: 'true' or 'false'
2721 # no value, number > 0, 'true' and 'yes' values are true
2722 # rest of values are treated as false (never as error)
2723 sub config_to_bool {
2724         my $val = shift;
2725
2726         return 1 if !defined $val;             # section.key
2727
2728         # strip leading and trailing whitespace
2729         $val =~ s/^\s+//;
2730         $val =~ s/\s+$//;
2731
2732         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2733                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2734 }
2735
2736 # convert config value to simple decimal number
2737 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2738 # to be multiplied by 1024, 1048576, or 1073741824
2739 sub config_to_int {
2740         my $val = shift;
2741
2742         # strip leading and trailing whitespace
2743         $val =~ s/^\s+//;
2744         $val =~ s/\s+$//;
2745
2746         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2747                 $unit = lc($unit);
2748                 # unknown unit is treated as 1
2749                 return $num * ($unit eq 'g' ? 1073741824 :
2750                                $unit eq 'm' ?    1048576 :
2751                                $unit eq 'k' ?       1024 : 1);
2752         }
2753         return $val;
2754 }
2755
2756 # convert config value to array reference, if needed
2757 sub config_to_multi {
2758         my $val = shift;
2759
2760         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2761 }
2762
2763 sub git_get_project_config {
2764         my ($key, $type) = @_;
2765
2766         return unless defined $git_dir;
2767
2768         # key sanity check
2769         return unless ($key);
2770         # only subsection, if exists, is case sensitive,
2771         # and not lowercased by 'git config -z -l'
2772         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2773                 $lo =~ s/_//g;
2774                 $key = join(".", lc($hi), $mi, lc($lo));
2775                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2776         } else {
2777                 $key = lc($key);
2778                 $key =~ s/_//g;
2779                 return if ($key =~ /\W/);
2780         }
2781         $key =~ s/^gitweb\.//;
2782
2783         # type sanity check
2784         if (defined $type) {
2785                 $type =~ s/^--//;
2786                 $type = undef
2787                         unless ($type eq 'bool' || $type eq 'int');
2788         }
2789
2790         # get config
2791         if (!defined $config_file ||
2792             $config_file ne "$git_dir/config") {
2793                 %config = git_parse_project_config('gitweb');
2794                 $config_file = "$git_dir/config";
2795         }
2796
2797         # check if config variable (key) exists
2798         return unless exists $config{"gitweb.$key"};
2799
2800         # ensure given type
2801         if (!defined $type) {
2802                 return $config{"gitweb.$key"};
2803         } elsif ($type eq 'bool') {
2804                 # backward compatibility: 'git config --bool' returns true/false
2805                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2806         } elsif ($type eq 'int') {
2807                 return config_to_int($config{"gitweb.$key"});
2808         }
2809         return $config{"gitweb.$key"};
2810 }
2811
2812 # get hash of given path at given ref
2813 sub git_get_hash_by_path {
2814         my $base = shift;
2815         my $path = shift || return undef;
2816         my $type = shift;
2817
2818         $path =~ s,/+$,,;
2819
2820         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2821                 or die_error(500, "Open git-ls-tree failed");
2822         my $line = <$fd>;
2823         close $fd or return undef;
2824
2825         if (!defined $line) {
2826                 # there is no tree or hash given by $path at $base
2827                 return undef;
2828         }
2829
2830         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2831         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2832         if (defined $type && $type ne $2) {
2833                 # type doesn't match
2834                 return undef;
2835         }
2836         return $3;
2837 }
2838
2839 # get path of entry with given hash at given tree-ish (ref)
2840 # used to get 'from' filename for combined diff (merge commit) for renames
2841 sub git_get_path_by_hash {
2842         my $base = shift || return;
2843         my $hash = shift || return;
2844
2845         local $/ = "\0";
2846
2847         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2848                 or return undef;
2849         while (my $line = <$fd>) {
2850                 chomp $line;
2851
2852                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2853                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2854                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2855                         close $fd;
2856                         return $1;
2857                 }
2858         }
2859         close $fd;
2860         return undef;
2861 }
2862
2863 ## ......................................................................
2864 ## git utility functions, directly accessing git repository
2865
2866 # get the value of config variable either from file named as the variable
2867 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2868 # configuration variable in the repository config file.
2869 sub git_get_file_or_project_config {
2870         my ($path, $name) = @_;
2871
2872         $git_dir = "$projectroot/$path";
2873         open my $fd, '<', "$git_dir/$name"
2874                 or return git_get_project_config($name);
2875         my $conf = <$fd>;
2876         close $fd;
2877         if (defined $conf) {
2878                 chomp $conf;
2879         }
2880         return $conf;
2881 }
2882
2883 sub git_get_project_description {
2884         my $path = shift;
2885         return git_get_file_or_project_config($path, 'description');
2886 }
2887
2888 sub git_get_project_category {
2889         my $path = shift;
2890         return git_get_file_or_project_config($path, 'category');
2891 }
2892
2893
2894 # supported formats:
2895 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2896 #   - if its contents is a number, use it as tag weight,
2897 #   - otherwise add a tag with weight 1
2898 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2899 #   the same value multiple times increases tag weight
2900 # * `gitweb.ctag' multi-valued repo config variable
2901 sub git_get_project_ctags {
2902         my $project = shift;
2903         my $ctags = {};
2904
2905         $git_dir = "$projectroot/$project";
2906         if (opendir my $dh, "$git_dir/ctags") {
2907                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2908                 foreach my $tagfile (@files) {
2909                         open my $ct, '<', $tagfile
2910                                 or next;
2911                         my $val = <$ct>;
2912                         chomp $val if $val;
2913                         close $ct;
2914
2915                         (my $ctag = $tagfile) =~ s#.*/##;
2916                         if ($val =~ /^\d+$/) {
2917                                 $ctags->{$ctag} = $val;
2918                         } else {
2919                                 $ctags->{$ctag} = 1;
2920                         }
2921                 }
2922                 closedir $dh;
2923
2924         } elsif (open my $fh, '<', "$git_dir/ctags") {
2925                 while (my $line = <$fh>) {
2926                         chomp $line;
2927                         $ctags->{$line}++ if $line;
2928                 }
2929                 close $fh;
2930
2931         } else {
2932                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2933                 foreach my $tag (@$taglist) {
2934                         $ctags->{$tag}++;
2935                 }
2936         }
2937
2938         return $ctags;
2939 }
2940
2941 # return hash, where keys are content tags ('ctags'),
2942 # and values are sum of weights of given tag in every project
2943 sub git_gather_all_ctags {
2944         my $projects = shift;
2945         my $ctags = {};
2946
2947         foreach my $p (@$projects) {
2948                 foreach my $ct (keys %{$p->{'ctags'}}) {
2949                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2950                 }
2951         }
2952
2953         return $ctags;
2954 }
2955
2956 sub git_populate_project_tagcloud {
2957         my $ctags = shift;
2958
2959         # First, merge different-cased tags; tags vote on casing
2960         my %ctags_lc;
2961         foreach (keys %$ctags) {
2962                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2963                 if (not $ctags_lc{lc $_}->{topcount}
2964                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2965                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2966                         $ctags_lc{lc $_}->{topname} = $_;
2967                 }
2968         }
2969
2970         my $cloud;
2971         my $matched = $input_params{'ctag'};
2972         if (eval { require HTML::TagCloud; 1; }) {
2973                 $cloud = HTML::TagCloud->new;
2974                 foreach my $ctag (sort keys %ctags_lc) {
2975                         # Pad the title with spaces so that the cloud looks
2976                         # less crammed.
2977                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2978                         $title =~ s/ /&nbsp;/g;
2979                         $title =~ s/^/&nbsp;/g;
2980                         $title =~ s/$/&nbsp;/g;
2981                         if (defined $matched && $matched eq $ctag) {
2982                                 $title = qq(<span class="match">$title</span>);
2983                         }
2984                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
2985                                     $ctags_lc{$ctag}->{count});
2986                 }
2987         } else {
2988                 $cloud = {};
2989                 foreach my $ctag (keys %ctags_lc) {
2990                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
2991                         if (defined $matched && $matched eq $ctag) {
2992                                 $title = qq(<span class="match">$title</span>);
2993                         }
2994                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
2995                         $cloud->{$ctag}{ctag} =
2996                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
2997                 }
2998         }
2999         return $cloud;
3000 }
3001
3002 sub git_show_project_tagcloud {
3003         my ($cloud, $count) = @_;
3004         if (ref $cloud eq 'HTML::TagCloud') {
3005                 return $cloud->html_and_css($count);
3006         } else {
3007                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3008                 return
3009                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3010                         join (', ', map {
3011                                 $cloud->{$_}->{'ctag'}
3012                         } splice(@tags, 0, $count)) .
3013                         '</div>';
3014         }
3015 }
3016
3017 sub git_get_project_url_list {
3018         my $path = shift;
3019
3020         $git_dir = "$projectroot/$path";
3021         open my $fd, '<', "$git_dir/cloneurl"
3022                 or return wantarray ?
3023                 @{ config_to_multi(git_get_project_config('url')) } :
3024                    config_to_multi(git_get_project_config('url'));
3025         my @git_project_url_list = map { chomp; $_ } <$fd>;
3026         close $fd;
3027
3028         return wantarray ? @git_project_url_list : \@git_project_url_list;
3029 }
3030
3031 sub git_get_projects_list {
3032         my $filter = shift || '';
3033         my $paranoid = shift;
3034         my @list;
3035
3036         if (-d $projects_list) {
3037                 # search in directory
3038                 my $dir = $projects_list;
3039                 # remove the trailing "/"
3040                 $dir =~ s!/+$!!;
3041                 my $pfxlen = length("$dir");
3042                 my $pfxdepth = ($dir =~ tr!/!!);
3043                 # when filtering, search only given subdirectory
3044                 if ($filter && !$paranoid) {
3045                         $dir .= "/$filter";
3046                         $dir =~ s!/+$!!;
3047                 }
3048
3049                 File::Find::find({
3050                         follow_fast => 1, # follow symbolic links
3051                         follow_skip => 2, # ignore duplicates
3052                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3053                         wanted => sub {
3054                                 # global variables
3055                                 our $project_maxdepth;
3056                                 our $projectroot;
3057                                 # skip project-list toplevel, if we get it.
3058                                 return if (m!^[/.]$!);
3059                                 # only directories can be git repositories
3060                                 return unless (-d $_);
3061                                 # don't traverse too deep (Find is super slow on os x)
3062                                 # $project_maxdepth excludes depth of $projectroot
3063                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3064                                         $File::Find::prune = 1;
3065                                         return;
3066                                 }
3067
3068                                 my $path = substr($File::Find::name, $pfxlen + 1);
3069                                 # paranoidly only filter here
3070                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3071                                         next;
3072                                 }
3073                                 # we check related file in $projectroot
3074                                 if (check_export_ok("$projectroot/$path")) {
3075                                         push @list, { path => $path };
3076                                         $File::Find::prune = 1;
3077                                 }
3078                         },
3079                 }, "$dir");
3080
3081         } elsif (-f $projects_list) {
3082                 # read from file(url-encoded):
3083                 # 'git%2Fgit.git Linus+Torvalds'
3084                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3085                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3086                 open my $fd, '<', $projects_list or return;
3087         PROJECT:
3088                 while (my $line = <$fd>) {
3089                         chomp $line;
3090                         my ($path, $owner) = split ' ', $line;
3091                         $path = unescape($path);
3092                         $owner = unescape($owner);
3093                         if (!defined $path) {
3094                                 next;
3095                         }
3096                         # if $filter is rpovided, check if $path begins with $filter
3097                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3098                                 next;
3099                         }
3100                         if (check_export_ok("$projectroot/$path")) {
3101                                 my $pr = {
3102                                         path => $path
3103                                 };
3104                                 if ($owner) {
3105                                         $pr->{'owner'} = to_utf8($owner);
3106                                 }
3107                                 push @list, $pr;
3108                         }
3109                 }
3110                 close $fd;
3111         }
3112         return @list;
3113 }
3114
3115 # written with help of Tree::Trie module (Perl Artistic License, GPL compatibile)
3116 # as side effects it sets 'forks' field to list of forks for forked projects
3117 sub filter_forks_from_projects_list {
3118         my $projects = shift;
3119
3120         my %trie; # prefix tree of directories (path components)
3121         # generate trie out of those directories that might contain forks
3122         foreach my $pr (@$projects) {
3123                 my $path = $pr->{'path'};
3124                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3125                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3126                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3127                 next unless (-d "$projectroot/$path"); # containing directory exists
3128                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3129
3130                 # add to trie
3131                 my @dirs = split('/', $path);
3132                 # walk the trie, until either runs out of components or out of trie
3133                 my $ref = \%trie;
3134                 while (scalar @dirs &&
3135                        exists($ref->{$dirs[0]})) {
3136                         $ref = $ref->{shift @dirs};
3137                 }
3138                 # create rest of trie structure from rest of components
3139                 foreach my $dir (@dirs) {
3140                         $ref = $ref->{$dir} = {};
3141                 }
3142                 # create end marker, store $pr as a data
3143                 $ref->{''} = $pr if (!exists $ref->{''});
3144         }
3145
3146         # filter out forks, by finding shortest prefix match for paths
3147         my @filtered;
3148  PROJECT:
3149         foreach my $pr (@$projects) {
3150                 # trie lookup
3151                 my $ref = \%trie;
3152         DIR:
3153                 foreach my $dir (split('/', $pr->{'path'})) {
3154                         if (exists $ref->{''}) {
3155                                 # found [shortest] prefix, is a fork - skip it
3156                                 push @{$ref->{''}{'forks'}}, $pr;
3157                                 next PROJECT;
3158                         }
3159                         if (!exists $ref->{$dir}) {
3160                                 # not in trie, cannot have prefix, not a fork
3161                                 push @filtered, $pr;
3162                                 next PROJECT;
3163                         }
3164                         # If the dir is there, we just walk one step down the trie.
3165                         $ref = $ref->{$dir};
3166                 }
3167                 # we ran out of trie
3168                 # (shouldn't happen: it's either no match, or end marker)
3169                 push @filtered, $pr;
3170         }
3171
3172         return @filtered;
3173 }
3174
3175 # note: fill_project_list_info must be run first,
3176 # for 'descr_long' and 'ctags' to be filled
3177 sub search_projects_list {
3178         my ($projlist, %opts) = @_;
3179         my $tagfilter  = $opts{'tagfilter'};
3180         my $search_re = $opts{'search_regexp'};
3181
3182         return @$projlist
3183                 unless ($tagfilter || $search_re);
3184
3185         # searching projects require filling to be run before it;
3186         fill_project_list_info($projlist,
3187                                $tagfilter  ? 'ctags' : (),
3188                                $search_re ? ('path', 'descr') : ());
3189         my @projects;
3190  PROJECT:
3191         foreach my $pr (@$projlist) {
3192
3193                 if ($tagfilter) {
3194                         next unless ref($pr->{'ctags'}) eq 'HASH';
3195                         next unless
3196                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3197                 }
3198
3199                 if ($search_re) {
3200                         next unless
3201                                 $pr->{'path'} =~ /$search_re/ ||
3202                                 $pr->{'descr_long'} =~ /$search_re/;
3203                 }
3204
3205                 push @projects, $pr;
3206         }
3207
3208         return @projects;
3209 }
3210
3211 our $gitweb_project_owner = undef;
3212 sub git_get_project_list_from_file {
3213
3214         return if (defined $gitweb_project_owner);
3215
3216         $gitweb_project_owner = {};
3217         # read from file (url-encoded):
3218         # 'git%2Fgit.git Linus+Torvalds'
3219         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3220         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3221         if (-f $projects_list) {
3222                 open(my $fd, '<', $projects_list);
3223                 while (my $line = <$fd>) {
3224                         chomp $line;
3225                         my ($pr, $ow) = split ' ', $line;
3226                         $pr = unescape($pr);
3227                         $ow = unescape($ow);
3228                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3229                 }
3230                 close $fd;
3231         }
3232 }
3233
3234 sub git_get_project_owner {
3235         my $project = shift;
3236         my $owner;
3237
3238         return undef unless $project;
3239         $git_dir = "$projectroot/$project";
3240
3241         if (!defined $gitweb_project_owner) {
3242                 git_get_project_list_from_file();
3243         }
3244
3245         if (exists $gitweb_project_owner->{$project}) {
3246                 $owner = $gitweb_project_owner->{$project};
3247         }
3248         if (!defined $owner){
3249                 $owner = git_get_project_config('owner');
3250         }
3251         if (!defined $owner) {
3252                 $owner = get_file_owner("$git_dir");
3253         }
3254
3255         return $owner;
3256 }
3257
3258 sub git_get_last_activity {
3259         my ($path) = @_;
3260         my $fd;
3261
3262         $git_dir = "$projectroot/$path";
3263         open($fd, "-|", git_cmd(), 'for-each-ref',
3264              '--format=%(committer)',
3265              '--sort=-committerdate',
3266              '--count=1',
3267              map { "refs/$_" } get_branch_refs ()) or return;
3268         my $most_recent = <$fd>;
3269         close $fd or return;
3270         if (defined $most_recent &&
3271             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3272                 my $timestamp = $1;
3273                 my $age = time - $timestamp;
3274                 return ($age, age_string($age));
3275         }
3276         return (undef, undef);
3277 }
3278
3279 # Implementation note: when a single remote is wanted, we cannot use 'git
3280 # remote show -n' because that command always work (assuming it's a remote URL
3281 # if it's not defined), and we cannot use 'git remote show' because that would
3282 # try to make a network roundtrip. So the only way to find if that particular
3283 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3284 # and when we find what we want.
3285 sub git_get_remotes_list {
3286         my $wanted = shift;
3287         my %remotes = ();
3288
3289         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3290         return unless $fd;
3291         while (my $remote = <$fd>) {
3292                 chomp $remote;
3293                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3294                 next if $wanted and not $remote eq $wanted;
3295                 my ($url, $key) = ($1, $2);
3296
3297                 $remotes{$remote} ||= { 'heads' => () };
3298                 $remotes{$remote}{$key} = $url;
3299         }
3300         close $fd or return;
3301         return wantarray ? %remotes : \%remotes;
3302 }
3303
3304 # Takes a hash of remotes as first parameter and fills it by adding the
3305 # available remote heads for each of the indicated remotes.
3306 sub fill_remote_heads {
3307         my $remotes = shift;
3308         my @heads = map { "remotes/$_" } keys %$remotes;
3309         my @remoteheads = git_get_heads_list(undef, @heads);
3310         foreach my $remote (keys %$remotes) {
3311                 $remotes->{$remote}{'heads'} = [ grep {
3312                         $_->{'name'} =~ s!^$remote/!!
3313                         } @remoteheads ];
3314         }
3315 }
3316
3317 sub git_get_references {
3318         my $type = shift || "";
3319         my %refs;
3320         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3321         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3322         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3323                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3324                 or return;
3325
3326         while (my $line = <$fd>) {
3327                 chomp $line;
3328                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3329                         if (defined $refs{$1}) {
3330                                 push @{$refs{$1}}, $2;
3331                         } else {
3332                                 $refs{$1} = [ $2 ];
3333                         }
3334                 }
3335         }
3336         close $fd or return;
3337         return \%refs;
3338 }
3339
3340 sub git_get_rev_name_tags {
3341         my $hash = shift || return undef;
3342
3343         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3344                 or return;
3345         my $name_rev = <$fd>;
3346         close $fd;
3347
3348         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3349                 return $1;
3350         } else {
3351                 # catches also '$hash undefined' output
3352                 return undef;
3353         }
3354 }
3355
3356 ## ----------------------------------------------------------------------
3357 ## parse to hash functions
3358
3359 sub parse_date {
3360         my $epoch = shift;
3361         my $tz = shift || "-0000";
3362
3363         my %date;
3364         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3365         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3366         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3367         $date{'hour'} = $hour;
3368         $date{'minute'} = $min;
3369         $date{'mday'} = $mday;
3370         $date{'day'} = $days[$wday];
3371         $date{'month'} = $months[$mon];
3372         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3373                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3374         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3375                              $mday, $months[$mon], $hour ,$min;
3376         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3377                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3378
3379         my ($tz_sign, $tz_hour, $tz_min) =
3380                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3381         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3382         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3383         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3384         $date{'hour_local'} = $hour;
3385         $date{'minute_local'} = $min;
3386         $date{'tz_local'} = $tz;
3387         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3388                                   1900+$year, $mon+1, $mday,
3389                                   $hour, $min, $sec, $tz);
3390         return %date;
3391 }
3392
3393 sub parse_tag {
3394         my $tag_id = shift;
3395         my %tag;
3396         my @comment;
3397
3398         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3399         $tag{'id'} = $tag_id;
3400         while (my $line = <$fd>) {
3401                 chomp $line;
3402                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3403                         $tag{'object'} = $1;
3404                 } elsif ($line =~ m/^type (.+)$/) {
3405                         $tag{'type'} = $1;
3406                 } elsif ($line =~ m/^tag (.+)$/) {
3407                         $tag{'name'} = $1;
3408                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3409                         $tag{'author'} = $1;
3410                         $tag{'author_epoch'} = $2;
3411                         $tag{'author_tz'} = $3;
3412                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3413                                 $tag{'author_name'}  = $1;
3414                                 $tag{'author_email'} = $2;
3415                         } else {
3416                                 $tag{'author_name'} = $tag{'author'};
3417                         }
3418                 } elsif ($line =~ m/--BEGIN/) {
3419                         push @comment, $line;
3420                         last;
3421                 } elsif ($line eq "") {
3422                         last;
3423                 }
3424         }
3425         push @comment, <$fd>;
3426         $tag{'comment'} = \@comment;
3427         close $fd or return;
3428         if (!defined $tag{'name'}) {
3429                 return
3430         };
3431         return %tag
3432 }
3433
3434 sub parse_commit_text {
3435         my ($commit_text, $withparents) = @_;
3436         my @commit_lines = split '\n', $commit_text;
3437         my %co;
3438
3439         pop @commit_lines; # Remove '\0'
3440
3441         if (! @commit_lines) {
3442                 return;
3443         }
3444
3445         my $header = shift @commit_lines;
3446         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3447                 return;
3448         }
3449         ($co{'id'}, my @parents) = split ' ', $header;
3450         while (my $line = shift @commit_lines) {
3451                 last if $line eq "\n";
3452                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3453                         $co{'tree'} = $1;
3454                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3455                         push @parents, $1;
3456                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3457                         $co{'author'} = to_utf8($1);
3458                         $co{'author_epoch'} = $2;
3459                         $co{'author_tz'} = $3;
3460                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3461                                 $co{'author_name'}  = $1;
3462                                 $co{'author_email'} = $2;
3463                         } else {
3464                                 $co{'author_name'} = $co{'author'};
3465                         }
3466                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3467                         $co{'committer'} = to_utf8($1);
3468                         $co{'committer_epoch'} = $2;
3469                         $co{'committer_tz'} = $3;
3470                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3471                                 $co{'committer_name'}  = $1;
3472                                 $co{'committer_email'} = $2;
3473                         } else {
3474                                 $co{'committer_name'} = $co{'committer'};
3475                         }
3476                 }
3477         }
3478         if (!defined $co{'tree'}) {
3479                 return;
3480         };
3481         $co{'parents'} = \@parents;
3482         $co{'parent'} = $parents[0];
3483
3484         foreach my $title (@commit_lines) {
3485                 $title =~ s/^    //;
3486                 if ($title ne "") {
3487                         $co{'title'} = chop_str($title, 80, 5);
3488                         # remove leading stuff of merges to make the interesting part visible
3489                         if (length($title) > 50) {
3490                                 $title =~ s/^Automatic //;
3491                                 $title =~ s/^merge (of|with) /Merge ... /i;
3492                                 if (length($title) > 50) {
3493                                         $title =~ s/(http|rsync):\/\///;
3494                                 }
3495                                 if (length($title) > 50) {
3496                                         $title =~ s/(master|www|rsync)\.//;
3497                                 }
3498                                 if (length($title) > 50) {
3499                                         $title =~ s/kernel.org:?//;
3500                                 }
3501                                 if (length($title) > 50) {
3502                                         $title =~ s/\/pub\/scm//;
3503                                 }
3504                         }
3505                         $co{'title_short'} = chop_str($title, 50, 5);
3506                         last;
3507                 }
3508         }
3509         if (! defined $co{'title'} || $co{'title'} eq "") {
3510                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3511         }
3512         # remove added spaces
3513         foreach my $line (@commit_lines) {
3514                 $line =~ s/^    //;
3515         }
3516         $co{'comment'} = \@commit_lines;
3517
3518         my $age = time - $co{'committer_epoch'};
3519         $co{'age'} = $age;
3520         $co{'age_string'} = age_string($age);
3521         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3522         if ($age > 60*60*24*7*2) {
3523                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3524                 $co{'age_string_age'} = $co{'age_string'};
3525         } else {
3526                 $co{'age_string_date'} = $co{'age_string'};
3527                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3528         }
3529         return %co;
3530 }
3531
3532 sub parse_commit {
3533         my ($commit_id) = @_;
3534         my %co;
3535
3536         local $/ = "\0";
3537
3538         open my $fd, "-|", git_cmd(), "rev-list",
3539                 "--parents",
3540                 "--header",
3541                 "--max-count=1",
3542                 $commit_id,
3543                 "--",
3544                 or die_error(500, "Open git-rev-list failed");
3545         %co = parse_commit_text(<$fd>, 1);
3546         close $fd;
3547
3548         return %co;
3549 }
3550
3551 sub parse_commits {
3552         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3553         my @cos;
3554
3555         $maxcount ||= 1;
3556         $skip ||= 0;
3557
3558         local $/ = "\0";
3559
3560         open my $fd, "-|", git_cmd(), "rev-list",
3561                 "--header",
3562                 @args,
3563                 ("--max-count=" . $maxcount),
3564                 ("--skip=" . $skip),
3565                 @extra_options,
3566                 $commit_id,
3567                 "--",
3568                 ($filename ? ($filename) : ())
3569                 or die_error(500, "Open git-rev-list failed");
3570         while (my $line = <$fd>) {
3571                 my %co = parse_commit_text($line);
3572                 push @cos, \%co;
3573         }
3574         close $fd;
3575
3576         return wantarray ? @cos : \@cos;
3577 }
3578
3579 # parse line of git-diff-tree "raw" output
3580 sub parse_difftree_raw_line {
3581         my $line = shift;
3582         my %res;
3583
3584         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3585         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3586         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3587                 $res{'from_mode'} = $1;
3588                 $res{'to_mode'} = $2;
3589                 $res{'from_id'} = $3;
3590                 $res{'to_id'} = $4;
3591                 $res{'status'} = $5;
3592                 $res{'similarity'} = $6;
3593                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3594                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3595                 } else {
3596                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3597                 }
3598         }
3599         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3600         # combined diff (for merge commit)
3601         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3602                 $res{'nparents'}  = length($1);
3603                 $res{'from_mode'} = [ split(' ', $2) ];
3604                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3605                 $res{'from_id'} = [ split(' ', $3) ];
3606                 $res{'to_id'} = pop @{$res{'from_id'}};
3607                 $res{'status'} = [ split('', $4) ];
3608                 $res{'to_file'} = unquote($5);
3609         }
3610         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3611         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3612                 $res{'commit'} = $1;
3613         }
3614
3615         return wantarray ? %res : \%res;
3616 }
3617
3618 # wrapper: return parsed line of git-diff-tree "raw" output
3619 # (the argument might be raw line, or parsed info)
3620 sub parsed_difftree_line {
3621         my $line_or_ref = shift;
3622
3623         if (ref($line_or_ref) eq "HASH") {
3624                 # pre-parsed (or generated by hand)
3625                 return $line_or_ref;
3626         } else {
3627                 return parse_difftree_raw_line($line_or_ref);
3628         }
3629 }
3630
3631 # parse line of git-ls-tree output
3632 sub parse_ls_tree_line {
3633         my $line = shift;
3634         my %opts = @_;
3635         my %res;
3636
3637         if ($opts{'-l'}) {
3638                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3639                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3640
3641                 $res{'mode'} = $1;
3642                 $res{'type'} = $2;
3643                 $res{'hash'} = $3;
3644                 $res{'size'} = $4;
3645                 if ($opts{'-z'}) {
3646                         $res{'name'} = $5;
3647                 } else {
3648                         $res{'name'} = unquote($5);
3649                 }
3650         } else {
3651                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3652                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3653
3654                 $res{'mode'} = $1;
3655                 $res{'type'} = $2;
3656                 $res{'hash'} = $3;
3657                 if ($opts{'-z'}) {
3658                         $res{'name'} = $4;
3659                 } else {
3660                         $res{'name'} = unquote($4);
3661                 }
3662         }
3663
3664         return wantarray ? %res : \%res;
3665 }
3666
3667 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3668 sub parse_from_to_diffinfo {
3669         my ($diffinfo, $from, $to, @parents) = @_;
3670
3671         if ($diffinfo->{'nparents'}) {
3672                 # combined diff
3673                 $from->{'file'} = [];
3674                 $from->{'href'} = [];
3675                 fill_from_file_info($diffinfo, @parents)
3676                         unless exists $diffinfo->{'from_file'};
3677                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3678                         $from->{'file'}[$i] =
3679                                 defined $diffinfo->{'from_file'}[$i] ?
3680                                         $diffinfo->{'from_file'}[$i] :
3681                                         $diffinfo->{'to_file'};
3682                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3683                                 $from->{'href'}[$i] = href(action=>"blob",
3684                                                            hash_base=>$parents[$i],
3685                                                            hash=>$diffinfo->{'from_id'}[$i],
3686                                                            file_name=>$from->{'file'}[$i]);
3687                         } else {
3688                                 $from->{'href'}[$i] = undef;
3689                         }
3690                 }
3691         } else {
3692                 # ordinary (not combined) diff
3693                 $from->{'file'} = $diffinfo->{'from_file'};
3694                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3695                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3696                                                hash=>$diffinfo->{'from_id'},
3697                                                file_name=>$from->{'file'});
3698                 } else {
3699                         delete $from->{'href'};
3700                 }
3701         }
3702
3703         $to->{'file'} = $diffinfo->{'to_file'};
3704         if (!is_deleted($diffinfo)) { # file exists in result
3705                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3706                                      hash=>$diffinfo->{'to_id'},
3707                                      file_name=>$to->{'file'});
3708         } else {
3709                 delete $to->{'href'};
3710         }
3711 }
3712
3713 ## ......................................................................
3714 ## parse to array of hashes functions
3715
3716 sub git_get_heads_list {
3717         my ($limit, @classes) = @_;
3718         @classes = get_branch_refs() unless @classes;
3719         my @patterns = map { "refs/$_" } @classes;
3720         my @headslist;
3721
3722         open my $fd, '-|', git_cmd(), 'for-each-ref',
3723                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3724                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3725                 @patterns
3726                 or return;
3727         while (my $line = <$fd>) {
3728                 my %ref_item;
3729
3730                 chomp $line;
3731                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3732                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3733                 my ($committer, $epoch, $tz) =
3734                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3735                 $ref_item{'fullname'}  = $name;
3736                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3737                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3738                 $ref_item{'name'} = $name;
3739                 # for refs neither in 'heads' nor 'remotes' we want to
3740                 # show their ref dir
3741                 my $ref_dir = (defined $1) ? $1 : '';
3742                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3743                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3744                 }
3745
3746                 $ref_item{'id'}    = $hash;
3747                 $ref_item{'title'} = $title || '(no commit message)';
3748                 $ref_item{'epoch'} = $epoch;
3749                 if ($epoch) {
3750                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3751                 } else {
3752                         $ref_item{'age'} = "unknown";
3753                 }
3754
3755                 push @headslist, \%ref_item;
3756         }
3757         close $fd;
3758
3759         return wantarray ? @headslist : \@headslist;
3760 }
3761
3762 sub git_get_tags_list {
3763         my $limit = shift;
3764         my @tagslist;
3765
3766         open my $fd, '-|', git_cmd(), 'for-each-ref',
3767                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3768                 '--format=%(objectname) %(objecttype) %(refname) '.
3769                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3770                 'refs/tags'
3771                 or return;
3772         while (my $line = <$fd>) {
3773                 my %ref_item;
3774
3775                 chomp $line;
3776                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3777                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3778                 my ($creator, $epoch, $tz) =
3779                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3780                 $ref_item{'fullname'} = $name;
3781                 $name =~ s!^refs/tags/!!;
3782
3783                 $ref_item{'type'} = $type;
3784                 $ref_item{'id'} = $id;
3785                 $ref_item{'name'} = $name;
3786                 if ($type eq "tag") {
3787                         $ref_item{'subject'} = $title;
3788                         $ref_item{'reftype'} = $reftype;
3789                         $ref_item{'refid'}   = $refid;
3790                 } else {
3791                         $ref_item{'reftype'} = $type;
3792                         $ref_item{'refid'}   = $id;
3793                 }
3794
3795                 if ($type eq "tag" || $type eq "commit") {
3796                         $ref_item{'epoch'} = $epoch;
3797                         if ($epoch) {
3798                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3799                         } else {
3800                                 $ref_item{'age'} = "unknown";
3801                         }
3802                 }
3803
3804                 push @tagslist, \%ref_item;
3805         }
3806         close $fd;
3807
3808         return wantarray ? @tagslist : \@tagslist;
3809 }
3810
3811 ## ----------------------------------------------------------------------
3812 ## filesystem-related functions
3813
3814 sub get_file_owner {
3815         my $path = shift;
3816
3817         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3818         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3819         if (!defined $gcos) {
3820                 return undef;
3821         }
3822         my $owner = $gcos;
3823         $owner =~ s/[,;].*$//;
3824         return to_utf8($owner);
3825 }
3826
3827 # assume that file exists
3828 sub insert_file {
3829         my $filename = shift;
3830
3831         open my $fd, '<', $filename;
3832         print map { to_utf8($_) } <$fd>;
3833         close $fd;
3834 }
3835
3836 ## ......................................................................
3837 ## mimetype related functions
3838
3839 sub mimetype_guess_file {
3840         my $filename = shift;
3841         my $mimemap = shift;
3842         -r $mimemap or return undef;
3843
3844         my %mimemap;
3845         open(my $mh, '<', $mimemap) or return undef;
3846         while (<$mh>) {
3847                 next if m/^#/; # skip comments
3848                 my ($mimetype, @exts) = split(/\s+/);
3849                 foreach my $ext (@exts) {
3850                         $mimemap{$ext} = $mimetype;
3851                 }
3852         }
3853         close($mh);
3854
3855         $filename =~ /\.([^.]*)$/;
3856         return $mimemap{$1};
3857 }
3858
3859 sub mimetype_guess {
3860         my $filename = shift;
3861         my $mime;
3862         $filename =~ /\./ or return undef;
3863
3864         if ($mimetypes_file) {
3865                 my $file = $mimetypes_file;
3866                 if ($file !~ m!^/!) { # if it is relative path
3867                         # it is relative to project
3868                         $file = "$projectroot/$project/$file";
3869                 }
3870                 $mime = mimetype_guess_file($filename, $file);
3871         }
3872         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3873         return $mime;
3874 }
3875
3876 sub blob_mimetype {
3877         my $fd = shift;
3878         my $filename = shift;
3879
3880         if ($filename) {
3881                 my $mime = mimetype_guess($filename);
3882                 $mime and return $mime;
3883         }
3884
3885         # just in case
3886         return $default_blob_plain_mimetype unless $fd;
3887
3888         if (-T $fd) {
3889                 return 'text/plain';
3890         } elsif (! $filename) {
3891                 return 'application/octet-stream';
3892         } elsif ($filename =~ m/\.png$/i) {
3893                 return 'image/png';
3894         } elsif ($filename =~ m/\.gif$/i) {
3895                 return 'image/gif';
3896         } elsif ($filename =~ m/\.jpe?g$/i) {
3897                 return 'image/jpeg';
3898         } else {
3899                 return 'application/octet-stream';
3900         }
3901 }
3902
3903 sub blob_contenttype {
3904         my ($fd, $file_name, $type) = @_;
3905
3906         $type ||= blob_mimetype($fd, $file_name);
3907         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3908                 $type .= "; charset=$default_text_plain_charset";
3909         }
3910
3911         return $type;
3912 }
3913
3914 # guess file syntax for syntax highlighting; return undef if no highlighting
3915 # the name of syntax can (in the future) depend on syntax highlighter used
3916 sub guess_file_syntax {
3917         my ($highlight, $mimetype, $file_name) = @_;
3918         return undef unless ($highlight && defined $file_name);
3919         my $basename = basename($file_name, '.in');
3920         return $highlight_basename{$basename}
3921                 if exists $highlight_basename{$basename};
3922
3923         $basename =~ /\.([^.]*)$/;
3924         my $ext = $1 or return undef;
3925         return $highlight_ext{$ext}
3926                 if exists $highlight_ext{$ext};
3927
3928         return undef;
3929 }
3930
3931 # run highlighter and return FD of its output,
3932 # or return original FD if no highlighting
3933 sub run_highlighter {
3934         my ($fd, $highlight, $syntax) = @_;
3935         return $fd unless ($highlight && defined $syntax);
3936
3937         close $fd;
3938         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3939                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
3940                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
3941                     '--', "-fe=$fallback_encoding")." | ".
3942                   quote_command($highlight_bin).
3943                   " --replace-tabs=8 --fragment --syntax $syntax |"
3944                 or die_error(500, "Couldn't open file or run syntax highlighter");
3945         return $fd;
3946 }
3947
3948 ## ======================================================================
3949 ## functions printing HTML: header, footer, error page
3950
3951 sub get_page_title {
3952         my $title = to_utf8($site_name);
3953
3954         unless (defined $project) {
3955                 if (defined $project_filter) {
3956                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3957                 }
3958                 return $title;
3959         }
3960         $title .= " - " . to_utf8($project);
3961
3962         return $title unless (defined $action);
3963         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3964
3965         return $title unless (defined $file_name);
3966         $title .= " - " . esc_path($file_name);
3967         if ($action eq "tree" && $file_name !~ m|/$|) {
3968                 $title .= "/";
3969         }
3970
3971         return $title;
3972 }
3973
3974 sub get_content_type_html {
3975         # require explicit support from the UA if we are to send the page as
3976         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3977         # we have to do this because MSIE sometimes globs '*/*', pretending to
3978         # support xhtml+xml but choking when it gets what it asked for.
3979         if (defined $cgi->http('HTTP_ACCEPT') &&
3980             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3981             $cgi->Accept('application/xhtml+xml') != 0) {
3982                 return 'application/xhtml+xml';
3983         } else {
3984                 return 'text/html';
3985         }
3986 }
3987
3988 sub print_feed_meta {
3989         if (defined $project) {
3990                 my %href_params = get_feed_info();
3991                 if (!exists $href_params{'-title'}) {
3992                         $href_params{'-title'} = 'log';
3993                 }
3994
3995                 foreach my $format (qw(RSS Atom)) {
3996                         my $type = lc($format);
3997                         my %link_attr = (
3998                                 '-rel' => 'alternate',
3999                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4000                                 '-type' => "application/$type+xml"
4001                         );
4002
4003                         $href_params{'extra_options'} = undef;
4004                         $href_params{'action'} = $type;
4005                         $link_attr{'-href'} = href(%href_params);
4006                         print "<link ".
4007                               "rel=\"$link_attr{'-rel'}\" ".
4008                               "title=\"$link_attr{'-title'}\" ".
4009                               "href=\"$link_attr{'-href'}\" ".
4010                               "type=\"$link_attr{'-type'}\" ".
4011                               "/>\n";
4012
4013                         $href_params{'extra_options'} = '--no-merges';
4014                         $link_attr{'-href'} = href(%href_params);
4015                         $link_attr{'-title'} .= ' (no merges)';
4016                         print "<link ".
4017                               "rel=\"$link_attr{'-rel'}\" ".
4018                               "title=\"$link_attr{'-title'}\" ".
4019                               "href=\"$link_attr{'-href'}\" ".
4020                               "type=\"$link_attr{'-type'}\" ".
4021                               "/>\n";
4022                 }
4023
4024         } else {
4025                 printf('<link rel="alternate" title="%s projects list" '.
4026                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4027                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4028                 printf('<link rel="alternate" title="%s projects feeds" '.
4029                        'href="%s" type="text/x-opml" />'."\n",
4030                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4031         }
4032 }
4033
4034 sub print_header_links {
4035         my $status = shift;
4036
4037         # print out each stylesheet that exist, providing backwards capability
4038         # for those people who defined $stylesheet in a config file
4039         if (defined $stylesheet) {
4040                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4041         } else {
4042                 foreach my $stylesheet (@stylesheets) {
4043                         next unless $stylesheet;
4044                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4045                 }
4046         }
4047         print_feed_meta()
4048                 if ($status eq '200 OK');
4049         if (defined $favicon) {
4050                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4051         }
4052 }
4053
4054 sub print_nav_breadcrumbs_path {
4055         my $dirprefix = undef;
4056         while (my $part = shift) {
4057                 $dirprefix .= "/" if defined $dirprefix;
4058                 $dirprefix .= $part;
4059                 print $cgi->a({-href => href(project => undef,
4060                                              project_filter => $dirprefix,
4061                                              action => "project_list")},
4062                               esc_html($part)) . " / ";
4063         }
4064 }
4065
4066 sub print_nav_breadcrumbs {
4067         my %opts = @_;
4068
4069         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4070                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4071         }
4072         if (defined $project) {
4073                 my @dirname = split '/', $project;
4074                 my $projectbasename = pop @dirname;
4075                 print_nav_breadcrumbs_path(@dirname);
4076                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4077                 if (defined $action) {
4078                         my $action_print = $action ;
4079                         if (defined $opts{-action_extra}) {
4080                                 $action_print = $cgi->a({-href => href(action=>$action)},
4081                                         $action);
4082                         }
4083                         print " / $action_print";
4084                 }
4085                 if (defined $opts{-action_extra}) {
4086                         print " / $opts{-action_extra}";
4087                 }
4088                 print "\n";
4089         } elsif (defined $project_filter) {
4090                 print_nav_breadcrumbs_path(split '/', $project_filter);
4091         }
4092 }
4093
4094 sub print_search_form {
4095         if (!defined $searchtext) {
4096                 $searchtext = "";
4097         }
4098         my $search_hash;
4099         if (defined $hash_base) {
4100                 $search_hash = $hash_base;
4101         } elsif (defined $hash) {
4102                 $search_hash = $hash;
4103         } else {
4104                 $search_hash = "HEAD";
4105         }
4106         my $action = $my_uri;
4107         my $use_pathinfo = gitweb_check_feature('pathinfo');
4108         if ($use_pathinfo) {
4109                 $action .= "/".esc_url($project);
4110         }
4111         print $cgi->start_form(-method => "get", -action => $action) .
4112               "<div class=\"search\">\n" .
4113               (!$use_pathinfo &&
4114               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4115               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4116               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4117               $cgi->popup_menu(-name => 'st', -default => 'commit',
4118                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4119               " " . $cgi->a({-href => href(action=>"search_help"),
4120                              -title => "search help" }, "?") . " search:\n",
4121               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4122               "<span title=\"Extended regular expression\">" .
4123               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4124                              -checked => $search_use_regexp) .
4125               "</span>" .
4126               "</div>" .
4127               $cgi->end_form() . "\n";
4128 }
4129
4130 sub git_header_html {
4131         my $status = shift || "200 OK";
4132         my $expires = shift;
4133         my %opts = @_;
4134
4135         my $title = get_page_title();
4136         my $content_type = get_content_type_html();
4137         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4138                            -status=> $status, -expires => $expires)
4139                 unless ($opts{'-no_http_header'});
4140         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4141         print <<EOF;
4142 <?xml version="1.0" encoding="utf-8"?>
4143 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4144 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4145 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4146 <!-- git core binaries version $git_version -->
4147 <head>
4148 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4149 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4150 <meta name="robots" content="index, nofollow"/>
4151 <title>$title</title>
4152 EOF
4153         # the stylesheet, favicon etc urls won't work correctly with path_info
4154         # unless we set the appropriate base URL
4155         if ($ENV{'PATH_INFO'}) {
4156                 print "<base href=\"".esc_url($base_url)."\" />\n";
4157         }
4158         print_header_links($status);
4159
4160         if (defined $site_html_head_string) {
4161                 print to_utf8($site_html_head_string);
4162         }
4163
4164         print "</head>\n" .
4165               "<body>\n";
4166
4167         if (defined $site_header && -f $site_header) {
4168                 insert_file($site_header);
4169         }
4170
4171         print "<div class=\"page_header\">\n";
4172         if (defined $logo) {
4173                 print $cgi->a({-href => esc_url($logo_url),
4174                                -title => $logo_label},
4175                               $cgi->img({-src => esc_url($logo),
4176                                          -width => 72, -height => 27,
4177                                          -alt => "git",
4178                                          -class => "logo"}));
4179         }
4180         print_nav_breadcrumbs(%opts);
4181         print "</div>\n";
4182
4183         my $have_search = gitweb_check_feature('search');
4184         if (defined $project && $have_search) {
4185                 print_search_form();
4186         }
4187 }
4188
4189 sub git_footer_html {
4190         my $feed_class = 'rss_logo';
4191
4192         print "<div class=\"page_footer\">\n";
4193         if (defined $project) {
4194                 my $descr = git_get_project_description($project);
4195                 if (defined $descr) {
4196                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4197                 }
4198
4199                 my %href_params = get_feed_info();
4200                 if (!%href_params) {
4201                         $feed_class .= ' generic';
4202                 }
4203                 $href_params{'-title'} ||= 'log';
4204
4205                 foreach my $format (qw(RSS Atom)) {
4206                         $href_params{'action'} = lc($format);
4207                         print $cgi->a({-href => href(%href_params),
4208                                       -title => "$href_params{'-title'} $format feed",
4209                                       -class => $feed_class}, $format)."\n";
4210                 }
4211
4212         } else {
4213                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4214                                              project_filter => $project_filter),
4215                               -class => $feed_class}, "OPML") . " ";
4216                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4217                                              project_filter => $project_filter),
4218                               -class => $feed_class}, "TXT") . "\n";
4219         }
4220         print "</div>\n"; # class="page_footer"
4221
4222         if (defined $t0 && gitweb_check_feature('timed')) {
4223                 print "<div id=\"generating_info\">\n";
4224                 print 'This page took '.
4225                       '<span id="generating_time" class="time_span">'.
4226                       tv_interval($t0, [ gettimeofday() ]).
4227                       ' seconds </span>'.
4228                       ' and '.
4229                       '<span id="generating_cmd">'.
4230                       $number_of_git_cmds.
4231                       '</span> git commands '.
4232                       " to generate.\n";
4233                 print "</div>\n"; # class="page_footer"
4234         }
4235
4236         if (defined $site_footer && -f $site_footer) {
4237                 insert_file($site_footer);
4238         }
4239
4240         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4241         if (defined $action &&
4242             $action eq 'blame_incremental') {
4243                 print qq!<script type="text/javascript">\n!.
4244                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4245                       qq!           "!. href() .qq!");\n!.
4246                       qq!</script>\n!;
4247         } else {
4248                 my ($jstimezone, $tz_cookie, $datetime_class) =
4249                         gitweb_get_feature('javascript-timezone');
4250
4251                 print qq!<script type="text/javascript">\n!.
4252                       qq!window.onload = function () {\n!;
4253                 if (gitweb_check_feature('javascript-actions')) {
4254                         print qq!       fixLinks();\n!;
4255                 }
4256                 if ($jstimezone && $tz_cookie && $datetime_class) {
4257                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4258                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4259                 }
4260                 print qq!};\n!.
4261                       qq!</script>\n!;
4262         }
4263
4264         print "</body>\n" .
4265               "</html>";
4266 }
4267
4268 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4269 # Example: die_error(404, 'Hash not found')
4270 # By convention, use the following status codes (as defined in RFC 2616):
4271 # 400: Invalid or missing CGI parameters, or
4272 #      requested object exists but has wrong type.
4273 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4274 #      this server or project.
4275 # 404: Requested object/revision/project doesn't exist.
4276 # 500: The server isn't configured properly, or
4277 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4278 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4279 # 503: The server is currently unavailable (because it is overloaded,
4280 #      or down for maintenance).  Generally, this is a temporary state.
4281 sub die_error {
4282         my $status = shift || 500;
4283         my $error = esc_html(shift) || "Internal Server Error";
4284         my $extra = shift;
4285         my %opts = @_;
4286
4287         my %http_responses = (
4288                 400 => '400 Bad Request',
4289                 403 => '403 Forbidden',
4290                 404 => '404 Not Found',
4291                 500 => '500 Internal Server Error',
4292                 503 => '503 Service Unavailable',
4293         );
4294         git_header_html($http_responses{$status}, undef, %opts);
4295         print <<EOF;
4296 <div class="page_body">
4297 <br /><br />
4298 $status - $error
4299 <br />
4300 EOF
4301         if (defined $extra) {
4302                 print "<hr />\n" .
4303                       "$extra\n";
4304         }
4305         print "</div>\n";
4306
4307         git_footer_html();
4308         goto DONE_GITWEB
4309                 unless ($opts{'-error_handler'});
4310 }
4311
4312 ## ----------------------------------------------------------------------
4313 ## functions printing or outputting HTML: navigation
4314
4315 sub git_print_page_nav {
4316         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4317         $extra = '' if !defined $extra; # pager or formats
4318
4319         my @navs = qw(summary shortlog log commit commitdiff tree);
4320         if ($suppress) {
4321                 @navs = grep { $_ ne $suppress } @navs;
4322         }
4323
4324         my %arg = map { $_ => {action=>$_} } @navs;
4325         if (defined $head) {
4326                 for (qw(commit commitdiff)) {
4327                         $arg{$_}{'hash'} = $head;
4328                 }
4329                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4330                         for (qw(shortlog log)) {
4331                                 $arg{$_}{'hash'} = $head;
4332                         }
4333                 }
4334         }
4335
4336         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4337         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4338
4339         my @actions = gitweb_get_feature('actions');
4340         my %repl = (
4341                 '%' => '%',
4342                 'n' => $project,         # project name
4343                 'f' => $git_dir,         # project path within filesystem
4344                 'h' => $treehead || '',  # current hash ('h' parameter)
4345                 'b' => $treebase || '',  # hash base ('hb' parameter)
4346         );
4347         while (@actions) {
4348                 my ($label, $link, $pos) = splice(@actions,0,3);
4349                 # insert
4350                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4351                 # munch munch
4352                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4353                 $arg{$label}{'_href'} = $link;
4354         }
4355
4356         print "<div class=\"page_nav\">\n" .
4357                 (join " | ",
4358                  map { $_ eq $current ?
4359                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4360                  } @navs);
4361         print "<br/>\n$extra<br/>\n" .
4362               "</div>\n";
4363 }
4364
4365 # returns a submenu for the nagivation of the refs views (tags, heads,
4366 # remotes) with the current view disabled and the remotes view only
4367 # available if the feature is enabled
4368 sub format_ref_views {
4369         my ($current) = @_;
4370         my @ref_views = qw{tags heads};
4371         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4372         return join " | ", map {
4373                 $_ eq $current ? $_ :
4374                 $cgi->a({-href => href(action=>$_)}, $_)
4375         } @ref_views
4376 }
4377
4378 sub format_paging_nav {
4379         my ($action, $page, $has_next_link) = @_;
4380         my $paging_nav;
4381
4382
4383         if ($page > 0) {
4384                 $paging_nav .=
4385                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4386                         " &sdot; " .
4387                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4388                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4389         } else {
4390                 $paging_nav .= "first &sdot; prev";
4391         }
4392
4393         if ($has_next_link) {
4394                 $paging_nav .= " &sdot; " .
4395                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4396                                  -accesskey => "n", -title => "Alt-n"}, "next");
4397         } else {
4398                 $paging_nav .= " &sdot; next";
4399         }
4400
4401         return $paging_nav;
4402 }
4403
4404 ## ......................................................................
4405 ## functions printing or outputting HTML: div
4406
4407 sub git_print_header_div {
4408         my ($action, $title, $hash, $hash_base) = @_;
4409         my %args = ();
4410
4411         $args{'action'} = $action;
4412         $args{'hash'} = $hash if $hash;
4413         $args{'hash_base'} = $hash_base if $hash_base;
4414
4415         print "<div class=\"header\">\n" .
4416               $cgi->a({-href => href(%args), -class => "title"},
4417               $title ? $title : $action) .
4418               "\n</div>\n";
4419 }
4420
4421 sub format_repo_url {
4422         my ($name, $url) = @_;
4423         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4424 }
4425
4426 # Group output by placing it in a DIV element and adding a header.
4427 # Options for start_div() can be provided by passing a hash reference as the
4428 # first parameter to the function.
4429 # Options to git_print_header_div() can be provided by passing an array
4430 # reference. This must follow the options to start_div if they are present.
4431 # The content can be a scalar, which is output as-is, a scalar reference, which
4432 # is output after html escaping, an IO handle passed either as *handle or
4433 # *handle{IO}, or a function reference. In the latter case all following
4434 # parameters will be taken as argument to the content function call.
4435 sub git_print_section {
4436         my ($div_args, $header_args, $content);
4437         my $arg = shift;
4438         if (ref($arg) eq 'HASH') {
4439                 $div_args = $arg;
4440                 $arg = shift;
4441         }
4442         if (ref($arg) eq 'ARRAY') {
4443                 $header_args = $arg;
4444                 $arg = shift;
4445         }
4446         $content = $arg;
4447
4448         print $cgi->start_div($div_args);
4449         git_print_header_div(@$header_args);
4450
4451         if (ref($content) eq 'CODE') {
4452                 $content->(@_);
4453         } elsif (ref($content) eq 'SCALAR') {
4454                 print esc_html($$content);
4455         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4456                 print <$content>;
4457         } elsif (!ref($content) && defined($content)) {
4458                 print $content;
4459         }
4460
4461         print $cgi->end_div;
4462 }
4463
4464 sub format_timestamp_html {
4465         my $date = shift;
4466         my $strtime = $date->{'rfc2822'};
4467
4468         my (undef, undef, $datetime_class) =
4469                 gitweb_get_feature('javascript-timezone');
4470         if ($datetime_class) {
4471                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4472         }
4473
4474         my $localtime_format = '(%02d:%02d %s)';
4475         if ($date->{'hour_local'} < 6) {
4476                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4477         }
4478         $strtime .= ' ' .
4479                     sprintf($localtime_format,
4480                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4481
4482         return $strtime;
4483 }
4484
4485 # Outputs the author name and date in long form
4486 sub git_print_authorship {
4487         my $co = shift;
4488         my %opts = @_;
4489         my $tag = $opts{-tag} || 'div';
4490         my $author = $co->{'author_name'};
4491
4492         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4493         print "<$tag class=\"author_date\">" .
4494               format_search_author($author, "author", esc_html($author)) .
4495               " [".format_timestamp_html(\%ad)."]".
4496               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4497               "</$tag>\n";
4498 }
4499
4500 # Outputs table rows containing the full author or committer information,
4501 # in the format expected for 'commit' view (& similar).
4502 # Parameters are a commit hash reference, followed by the list of people
4503 # to output information for. If the list is empty it defaults to both
4504 # author and committer.
4505 sub git_print_authorship_rows {
4506         my $co = shift;
4507         # too bad we can't use @people = @_ || ('author', 'committer')
4508         my @people = @_;
4509         @people = ('author', 'committer') unless @people;
4510         foreach my $who (@people) {
4511                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4512                 print "<tr><td>$who</td><td>" .
4513                       format_search_author($co->{"${who}_name"}, $who,
4514                                            esc_html($co->{"${who}_name"})) . " " .
4515                       format_search_author($co->{"${who}_email"}, $who,
4516                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4517                       "</td><td rowspan=\"2\">" .
4518                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4519                       "</td></tr>\n" .
4520                       "<tr>" .
4521                       "<td></td><td>" .
4522                       format_timestamp_html(\%wd) .
4523                       "</td>" .
4524                       "</tr>\n";
4525         }
4526 }
4527
4528 sub git_print_page_path {
4529         my $name = shift;
4530         my $type = shift;
4531         my $hb = shift;
4532
4533
4534         print "<div class=\"page_path\">";
4535         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4536                       -title => 'tree root'}, to_utf8("[$project]"));
4537         print " / ";
4538         if (defined $name) {
4539                 my @dirname = split '/', $name;
4540                 my $basename = pop @dirname;
4541                 my $fullname = '';
4542
4543                 foreach my $dir (@dirname) {
4544                         $fullname .= ($fullname ? '/' : '') . $dir;
4545                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4546                                                      hash_base=>$hb),
4547                                       -title => $fullname}, esc_path($dir));
4548                         print " / ";
4549                 }
4550                 if (defined $type && $type eq 'blob') {
4551                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4552                                                      hash_base=>$hb),
4553                                       -title => $name}, esc_path($basename));
4554                 } elsif (defined $type && $type eq 'tree') {
4555                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4556                                                      hash_base=>$hb),
4557                                       -title => $name}, esc_path($basename));
4558                         print " / ";
4559                 } else {
4560                         print esc_path($basename);
4561                 }
4562         }
4563         print "<br/></div>\n";
4564 }
4565
4566 sub git_print_log {
4567         my $log = shift;
4568         my %opts = @_;
4569
4570         if ($opts{'-remove_title'}) {
4571                 # remove title, i.e. first line of log
4572                 shift @$log;
4573         }
4574         # remove leading empty lines
4575         while (defined $log->[0] && $log->[0] eq "") {
4576                 shift @$log;
4577         }
4578
4579         # print log
4580         my $skip_blank_line = 0;
4581         foreach my $line (@$log) {
4582                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4583                         if (! $opts{'-remove_signoff'}) {
4584                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4585                                 $skip_blank_line = 1;
4586                         }
4587                         next;
4588                 }
4589
4590                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4591                         if (! $opts{'-remove_signoff'}) {
4592                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4593                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4594                                         "</span><br/>\n";
4595                                 $skip_blank_line = 1;
4596                         }
4597                         next;
4598                 }
4599
4600                 # print only one empty line
4601                 # do not print empty line after signoff
4602                 if ($line eq "") {
4603                         next if ($skip_blank_line);
4604                         $skip_blank_line = 1;
4605                 } else {
4606                         $skip_blank_line = 0;
4607                 }
4608
4609                 print format_log_line_html($line) . "<br/>\n";
4610         }
4611
4612         if ($opts{'-final_empty_line'}) {
4613                 # end with single empty line
4614                 print "<br/>\n" unless $skip_blank_line;
4615         }
4616 }
4617
4618 # return link target (what link points to)
4619 sub git_get_link_target {
4620         my $hash = shift;
4621         my $link_target;
4622
4623         # read link
4624         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4625                 or return;
4626         {
4627                 local $/ = undef;
4628                 $link_target = <$fd>;
4629         }
4630         close $fd
4631                 or return;
4632
4633         return $link_target;
4634 }
4635
4636 # given link target, and the directory (basedir) the link is in,
4637 # return target of link relative to top directory (top tree);
4638 # return undef if it is not possible (including absolute links).
4639 sub normalize_link_target {
4640         my ($link_target, $basedir) = @_;
4641
4642         # absolute symlinks (beginning with '/') cannot be normalized
4643         return if (substr($link_target, 0, 1) eq '/');
4644
4645         # normalize link target to path from top (root) tree (dir)
4646         my $path;
4647         if ($basedir) {
4648                 $path = $basedir . '/' . $link_target;
4649         } else {
4650                 # we are in top (root) tree (dir)
4651                 $path = $link_target;
4652         }
4653
4654         # remove //, /./, and /../
4655         my @path_parts;
4656         foreach my $part (split('/', $path)) {
4657                 # discard '.' and ''
4658                 next if (!$part || $part eq '.');
4659                 # handle '..'
4660                 if ($part eq '..') {
4661                         if (@path_parts) {
4662                                 pop @path_parts;
4663                         } else {
4664                                 # link leads outside repository (outside top dir)
4665                                 return;
4666                         }
4667                 } else {
4668                         push @path_parts, $part;
4669                 }
4670         }
4671         $path = join('/', @path_parts);
4672
4673         return $path;
4674 }
4675
4676 # print tree entry (row of git_tree), but without encompassing <tr> element
4677 sub git_print_tree_entry {
4678         my ($t, $basedir, $hash_base, $have_blame) = @_;
4679
4680         my %base_key = ();
4681         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4682
4683         # The format of a table row is: mode list link.  Where mode is
4684         # the mode of the entry, list is the name of the entry, an href,
4685         # and link is the action links of the entry.
4686
4687         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4688         if (exists $t->{'size'}) {
4689                 print "<td class=\"size\">$t->{'size'}</td>\n";
4690         }
4691         if ($t->{'type'} eq "blob") {
4692                 print "<td class=\"list\">" .
4693                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4694                                                file_name=>"$basedir$t->{'name'}", %base_key),
4695                                 -class => "list"}, esc_path($t->{'name'}));
4696                 if (S_ISLNK(oct $t->{'mode'})) {
4697                         my $link_target = git_get_link_target($t->{'hash'});
4698                         if ($link_target) {
4699                                 my $norm_target = normalize_link_target($link_target, $basedir);
4700                                 if (defined $norm_target) {
4701                                         print " -> " .
4702                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4703                                                                      file_name=>$norm_target),
4704                                                        -title => $norm_target}, esc_path($link_target));
4705                                 } else {
4706                                         print " -> " . esc_path($link_target);
4707                                 }
4708                         }
4709                 }
4710                 print "</td>\n";
4711                 print "<td class=\"link\">";
4712                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4713                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4714                               "blob");
4715                 if ($have_blame) {
4716                         print " | " .
4717                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4718                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4719                                       "blame");
4720                 }
4721                 if (defined $hash_base) {
4722                         print " | " .
4723                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4724                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4725                                       "history");
4726                 }
4727                 print " | " .
4728                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4729                                                file_name=>"$basedir$t->{'name'}")},
4730                                 "raw");
4731                 print "</td>\n";
4732
4733         } elsif ($t->{'type'} eq "tree") {
4734                 print "<td class=\"list\">";
4735                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4736                                              file_name=>"$basedir$t->{'name'}",
4737                                              %base_key)},
4738                               esc_path($t->{'name'}));
4739                 print "</td>\n";
4740                 print "<td class=\"link\">";
4741                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4742                                              file_name=>"$basedir$t->{'name'}",
4743                                              %base_key)},
4744                               "tree");
4745                 if (defined $hash_base) {
4746                         print " | " .
4747                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4748                                                      file_name=>"$basedir$t->{'name'}")},
4749                                       "history");
4750                 }
4751                 print "</td>\n";
4752         } else {
4753                 # unknown object: we can only present history for it
4754                 # (this includes 'commit' object, i.e. submodule support)
4755                 print "<td class=\"list\">" .
4756                       esc_path($t->{'name'}) .
4757                       "</td>\n";
4758                 print "<td class=\"link\">";
4759                 if (defined $hash_base) {
4760                         print $cgi->a({-href => href(action=>"history",
4761                                                      hash_base=>$hash_base,
4762                                                      file_name=>"$basedir$t->{'name'}")},
4763                                       "history");
4764                 }
4765                 print "</td>\n";
4766         }
4767 }
4768
4769 ## ......................................................................
4770 ## functions printing large fragments of HTML
4771
4772 # get pre-image filenames for merge (combined) diff
4773 sub fill_from_file_info {
4774         my ($diff, @parents) = @_;
4775
4776         $diff->{'from_file'} = [ ];
4777         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4778         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4779                 if ($diff->{'status'}[$i] eq 'R' ||
4780                     $diff->{'status'}[$i] eq 'C') {
4781                         $diff->{'from_file'}[$i] =
4782                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4783                 }
4784         }
4785
4786         return $diff;
4787 }
4788
4789 # is current raw difftree line of file deletion
4790 sub is_deleted {
4791         my $diffinfo = shift;
4792
4793         return $diffinfo->{'to_id'} eq ('0' x 40);
4794 }
4795
4796 # does patch correspond to [previous] difftree raw line
4797 # $diffinfo  - hashref of parsed raw diff format
4798 # $patchinfo - hashref of parsed patch diff format
4799 #              (the same keys as in $diffinfo)
4800 sub is_patch_split {
4801         my ($diffinfo, $patchinfo) = @_;
4802
4803         return defined $diffinfo && defined $patchinfo
4804                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4805 }
4806
4807
4808 sub git_difftree_body {
4809         my ($difftree, $hash, @parents) = @_;
4810         my ($parent) = $parents[0];
4811         my $have_blame = gitweb_check_feature('blame');
4812         print "<div class=\"list_head\">\n";
4813         if ($#{$difftree} > 10) {
4814                 print(($#{$difftree} + 1) . " files changed:\n");
4815         }
4816         print "</div>\n";
4817
4818         print "<table class=\"" .
4819               (@parents > 1 ? "combined " : "") .
4820               "diff_tree\">\n";
4821
4822         # header only for combined diff in 'commitdiff' view
4823         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4824         if ($has_header) {
4825                 # table header
4826                 print "<thead><tr>\n" .
4827                        "<th></th><th></th>\n"; # filename, patchN link
4828                 for (my $i = 0; $i < @parents; $i++) {
4829                         my $par = $parents[$i];
4830                         print "<th>" .
4831                               $cgi->a({-href => href(action=>"commitdiff",
4832                                                      hash=>$hash, hash_parent=>$par),
4833                                        -title => 'commitdiff to parent number ' .
4834                                                   ($i+1) . ': ' . substr($par,0,7)},
4835                                       $i+1) .
4836                               "&nbsp;</th>\n";
4837                 }
4838                 print "</tr></thead>\n<tbody>\n";
4839         }
4840
4841         my $alternate = 1;
4842         my $patchno = 0;
4843         foreach my $line (@{$difftree}) {
4844                 my $diff = parsed_difftree_line($line);
4845
4846                 if ($alternate) {
4847                         print "<tr class=\"dark\">\n";
4848                 } else {
4849                         print "<tr class=\"light\">\n";
4850                 }
4851                 $alternate ^= 1;
4852
4853                 if (exists $diff->{'nparents'}) { # combined diff
4854
4855                         fill_from_file_info($diff, @parents)
4856                                 unless exists $diff->{'from_file'};
4857
4858                         if (!is_deleted($diff)) {
4859                                 # file exists in the result (child) commit
4860                                 print "<td>" .
4861                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4862                                                              file_name=>$diff->{'to_file'},
4863                                                              hash_base=>$hash),
4864                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4865                                       "</td>\n";
4866                         } else {
4867                                 print "<td>" .
4868                                       esc_path($diff->{'to_file'}) .
4869                                       "</td>\n";
4870                         }
4871
4872                         if ($action eq 'commitdiff') {
4873                                 # link to patch
4874                                 $patchno++;
4875                                 print "<td class=\"link\">" .
4876                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4877                                               "patch") .
4878                                       " | " .
4879                                       "</td>\n";
4880                         }
4881
4882                         my $has_history = 0;
4883                         my $not_deleted = 0;
4884                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4885                                 my $hash_parent = $parents[$i];
4886                                 my $from_hash = $diff->{'from_id'}[$i];
4887                                 my $from_path = $diff->{'from_file'}[$i];
4888                                 my $status = $diff->{'status'}[$i];
4889
4890                                 $has_history ||= ($status ne 'A');
4891                                 $not_deleted ||= ($status ne 'D');
4892
4893                                 if ($status eq 'A') {
4894                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4895                                 } elsif ($status eq 'D') {
4896                                         print "<td class=\"link\">" .
4897                                               $cgi->a({-href => href(action=>"blob",
4898                                                                      hash_base=>$hash,
4899                                                                      hash=>$from_hash,
4900                                                                      file_name=>$from_path)},
4901                                                       "blob" . ($i+1)) .
4902                                               " | </td>\n";
4903                                 } else {
4904                                         if ($diff->{'to_id'} eq $from_hash) {
4905                                                 print "<td class=\"link nochange\">";
4906                                         } else {
4907                                                 print "<td class=\"link\">";
4908                                         }
4909                                         print $cgi->a({-href => href(action=>"blobdiff",
4910                                                                      hash=>$diff->{'to_id'},
4911                                                                      hash_parent=>$from_hash,
4912                                                                      hash_base=>$hash,
4913                                                                      hash_parent_base=>$hash_parent,
4914                                                                      file_name=>$diff->{'to_file'},
4915                                                                      file_parent=>$from_path)},
4916                                                       "diff" . ($i+1)) .
4917                                               " | </td>\n";
4918                                 }
4919                         }
4920
4921                         print "<td class=\"link\">";
4922                         if ($not_deleted) {
4923                                 print $cgi->a({-href => href(action=>"blob",
4924                                                              hash=>$diff->{'to_id'},
4925                                                              file_name=>$diff->{'to_file'},
4926                                                              hash_base=>$hash)},
4927                                               "blob");
4928                                 print " | " if ($has_history);
4929                         }
4930                         if ($has_history) {
4931                                 print $cgi->a({-href => href(action=>"history",
4932                                                              file_name=>$diff->{'to_file'},
4933                                                              hash_base=>$hash)},
4934                                               "history");
4935                         }
4936                         print "</td>\n";
4937
4938                         print "</tr>\n";
4939                         next; # instead of 'else' clause, to avoid extra indent
4940                 }
4941                 # else ordinary diff
4942
4943                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4944                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4945                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4946                         $to_mode_oct = oct $diff->{'to_mode'};
4947                         if (S_ISREG($to_mode_oct)) { # only for regular file
4948                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4949                         }
4950                         $to_file_type = file_type($diff->{'to_mode'});
4951                 }
4952                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4953                         $from_mode_oct = oct $diff->{'from_mode'};
4954                         if (S_ISREG($from_mode_oct)) { # only for regular file
4955                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4956                         }
4957                         $from_file_type = file_type($diff->{'from_mode'});
4958                 }
4959
4960                 if ($diff->{'status'} eq "A") { # created
4961                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4962                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4963                         $mode_chng   .= "]</span>";
4964                         print "<td>";
4965                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4966                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4967                                       -class => "list"}, esc_path($diff->{'file'}));
4968                         print "</td>\n";
4969                         print "<td>$mode_chng</td>\n";
4970                         print "<td class=\"link\">";
4971                         if ($action eq 'commitdiff') {
4972                                 # link to patch
4973                                 $patchno++;
4974                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4975                                               "patch") .
4976                                       " | ";
4977                         }
4978                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4979                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4980                                       "blob");
4981                         print "</td>\n";
4982
4983                 } elsif ($diff->{'status'} eq "D") { # deleted
4984                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4985                         print "<td>";
4986                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4987                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4988                                        -class => "list"}, esc_path($diff->{'file'}));
4989                         print "</td>\n";
4990                         print "<td>$mode_chng</td>\n";
4991                         print "<td class=\"link\">";
4992                         if ($action eq 'commitdiff') {
4993                                 # link to patch
4994                                 $patchno++;
4995                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4996                                               "patch") .
4997                                       " | ";
4998                         }
4999                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5000                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5001                                       "blob") . " | ";
5002                         if ($have_blame) {
5003                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5004                                                              file_name=>$diff->{'file'})},
5005                                               "blame") . " | ";
5006                         }
5007                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5008                                                      file_name=>$diff->{'file'})},
5009                                       "history");
5010                         print "</td>\n";
5011
5012                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5013                         my $mode_chnge = "";
5014                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5015                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5016                                 if ($from_file_type ne $to_file_type) {
5017                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5018                                 }
5019                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5020                                         if ($from_mode_str && $to_mode_str) {
5021                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5022                                         } elsif ($to_mode_str) {
5023                                                 $mode_chnge .= " mode: $to_mode_str";
5024                                         }
5025                                 }
5026                                 $mode_chnge .= "]</span>\n";
5027                         }
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_chnge</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                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5042                                 # "commit" view and modified file (not onlu mode changed)
5043                                 print $cgi->a({-href => href(action=>"blobdiff",
5044                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5045                                                              hash_base=>$hash, hash_parent_base=>$parent,
5046                                                              file_name=>$diff->{'file'})},
5047                                               "diff") .
5048                                       " | ";
5049                         }
5050                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5051                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5052                                        "blob") . " | ";
5053                         if ($have_blame) {
5054                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5055                                                              file_name=>$diff->{'file'})},
5056                                               "blame") . " | ";
5057                         }
5058                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5059                                                      file_name=>$diff->{'file'})},
5060                                       "history");
5061                         print "</td>\n";
5062
5063                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5064                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5065                         my $nstatus = $status_name{$diff->{'status'}};
5066                         my $mode_chng = "";
5067                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5068                                 # mode also for directories, so we cannot use $to_mode_str
5069                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5070                         }
5071                         print "<td>" .
5072                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5073                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5074                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5075                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5076                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5077                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5078                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5079                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5080                               "<td class=\"link\">";
5081                         if ($action eq 'commitdiff') {
5082                                 # link to patch
5083                                 $patchno++;
5084                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5085                                               "patch") .
5086                                       " | ";
5087                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5088                                 # "commit" view and modified file (not only pure rename or copy)
5089                                 print $cgi->a({-href => href(action=>"blobdiff",
5090                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5091                                                              hash_base=>$hash, hash_parent_base=>$parent,
5092                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5093                                               "diff") .
5094                                       " | ";
5095                         }
5096                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5097                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5098                                       "blob") . " | ";
5099                         if ($have_blame) {
5100                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5101                                                              file_name=>$diff->{'to_file'})},
5102                                               "blame") . " | ";
5103                         }
5104                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5105                                                     file_name=>$diff->{'to_file'})},
5106                                       "history");
5107                         print "</td>\n";
5108
5109                 } # we should not encounter Unmerged (U) or Unknown (X) status
5110                 print "</tr>\n";
5111         }
5112         print "</tbody>" if $has_header;
5113         print "</table>\n";
5114 }
5115
5116 # Print context lines and then rem/add lines in a side-by-side manner.
5117 sub print_sidebyside_diff_lines {
5118         my ($ctx, $rem, $add) = @_;
5119
5120         # print context block before add/rem block
5121         if (@$ctx) {
5122                 print join '',
5123                         '<div class="chunk_block ctx">',
5124                                 '<div class="old">',
5125                                 @$ctx,
5126                                 '</div>',
5127                                 '<div class="new">',
5128                                 @$ctx,
5129                                 '</div>',
5130                         '</div>';
5131         }
5132
5133         if (!@$add) {
5134                 # pure removal
5135                 print join '',
5136                         '<div class="chunk_block rem">',
5137                                 '<div class="old">',
5138                                 @$rem,
5139                                 '</div>',
5140                         '</div>';
5141         } elsif (!@$rem) {
5142                 # pure addition
5143                 print join '',
5144                         '<div class="chunk_block add">',
5145                                 '<div class="new">',
5146                                 @$add,
5147                                 '</div>',
5148                         '</div>';
5149         } else {
5150                 print join '',
5151                         '<div class="chunk_block chg">',
5152                                 '<div class="old">',
5153                                 @$rem,
5154                                 '</div>',
5155                                 '<div class="new">',
5156                                 @$add,
5157                                 '</div>',
5158                         '</div>';
5159         }
5160 }
5161
5162 # Print context lines and then rem/add lines in inline manner.
5163 sub print_inline_diff_lines {
5164         my ($ctx, $rem, $add) = @_;
5165
5166         print @$ctx, @$rem, @$add;
5167 }
5168
5169 # Format removed and added line, mark changed part and HTML-format them.
5170 # Implementation is based on contrib/diff-highlight
5171 sub format_rem_add_lines_pair {
5172         my ($rem, $add, $num_parents) = @_;
5173
5174         # We need to untabify lines before split()'ing them;
5175         # otherwise offsets would be invalid.
5176         chomp $rem;
5177         chomp $add;
5178         $rem = untabify($rem);
5179         $add = untabify($add);
5180
5181         my @rem = split(//, $rem);
5182         my @add = split(//, $add);
5183         my ($esc_rem, $esc_add);
5184         # Ignore leading +/- characters for each parent.
5185         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5186         my ($prefix_has_nonspace, $suffix_has_nonspace);
5187
5188         my $shorter = (@rem < @add) ? @rem : @add;
5189         while ($prefix_len < $shorter) {
5190                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5191
5192                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5193                 $prefix_len++;
5194         }
5195
5196         while ($prefix_len + $suffix_len < $shorter) {
5197                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5198
5199                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5200                 $suffix_len++;
5201         }
5202
5203         # Mark lines that are different from each other, but have some common
5204         # part that isn't whitespace.  If lines are completely different, don't
5205         # mark them because that would make output unreadable, especially if
5206         # diff consists of multiple lines.
5207         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5208                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5209                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5210                 $esc_add = esc_html_hl_regions($add, 'marked',
5211                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5212         } else {
5213                 $esc_rem = esc_html($rem, -nbsp=>1);
5214                 $esc_add = esc_html($add, -nbsp=>1);
5215         }
5216
5217         return format_diff_line(\$esc_rem, 'rem'),
5218                format_diff_line(\$esc_add, 'add');
5219 }
5220
5221 # HTML-format diff context, removed and added lines.
5222 sub format_ctx_rem_add_lines {
5223         my ($ctx, $rem, $add, $num_parents) = @_;
5224         my (@new_ctx, @new_rem, @new_add);
5225         my $can_highlight = 0;
5226         my $is_combined = ($num_parents > 1);
5227
5228         # Highlight if every removed line has a corresponding added line.
5229         if (@$add > 0 && @$add == @$rem) {
5230                 $can_highlight = 1;
5231
5232                 # Highlight lines in combined diff only if the chunk contains
5233                 # diff between the same version, e.g.
5234                 #
5235                 #    - a
5236                 #   -  b
5237                 #    + c
5238                 #   +  d
5239                 #
5240                 # Otherwise the highlightling would be confusing.
5241                 if ($is_combined) {
5242                         for (my $i = 0; $i < @$add; $i++) {
5243                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5244                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5245
5246                                 $prefix_rem =~ s/-/+/g;
5247
5248                                 if ($prefix_rem ne $prefix_add) {
5249                                         $can_highlight = 0;
5250                                         last;
5251                                 }
5252                         }
5253                 }
5254         }
5255
5256         if ($can_highlight) {
5257                 for (my $i = 0; $i < @$add; $i++) {
5258                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5259                                 $rem->[$i], $add->[$i], $num_parents);
5260                         push @new_rem, $line_rem;
5261                         push @new_add, $line_add;
5262                 }
5263         } else {
5264                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5265                 @new_add = map { format_diff_line($_, 'add') } @$add;
5266         }
5267
5268         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5269
5270         return (\@new_ctx, \@new_rem, \@new_add);
5271 }
5272
5273 # Print context lines and then rem/add lines.
5274 sub print_diff_lines {
5275         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5276         my $is_combined = $num_parents > 1;
5277
5278         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5279                 $num_parents);
5280
5281         if ($diff_style eq 'sidebyside' && !$is_combined) {
5282                 print_sidebyside_diff_lines($ctx, $rem, $add);
5283         } else {
5284                 # default 'inline' style and unknown styles
5285                 print_inline_diff_lines($ctx, $rem, $add);
5286         }
5287 }
5288
5289 sub print_diff_chunk {
5290         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5291         my (@ctx, @rem, @add);
5292
5293         # The class of the previous line.
5294         my $prev_class = '';
5295
5296         return unless @chunk;
5297
5298         # incomplete last line might be among removed or added lines,
5299         # or both, or among context lines: find which
5300         for (my $i = 1; $i < @chunk; $i++) {
5301                 if ($chunk[$i][0] eq 'incomplete') {
5302                         $chunk[$i][0] = $chunk[$i-1][0];
5303                 }
5304         }
5305
5306         # guardian
5307         push @chunk, ["", ""];
5308
5309         foreach my $line_info (@chunk) {
5310                 my ($class, $line) = @$line_info;
5311
5312                 # print chunk headers
5313                 if ($class && $class eq 'chunk_header') {
5314                         print format_diff_line($line, $class, $from, $to);
5315                         next;
5316                 }
5317
5318                 ## print from accumulator when have some add/rem lines or end
5319                 # of chunk (flush context lines), or when have add and rem
5320                 # lines and new block is reached (otherwise add/rem lines could
5321                 # be reordered)
5322                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5323                     (@rem && @add && $class ne $prev_class)) {
5324                         print_diff_lines(\@ctx, \@rem, \@add,
5325                                          $diff_style, $num_parents);
5326                         @ctx = @rem = @add = ();
5327                 }
5328
5329                 ## adding lines to accumulator
5330                 # guardian value
5331                 last unless $line;
5332                 # rem, add or change
5333                 if ($class eq 'rem') {
5334                         push @rem, $line;
5335                 } elsif ($class eq 'add') {
5336                         push @add, $line;
5337                 }
5338                 # context line
5339                 if ($class eq 'ctx') {
5340                         push @ctx, $line;
5341                 }
5342
5343                 $prev_class = $class;
5344         }
5345 }
5346
5347 sub git_patchset_body {
5348         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5349         my ($hash_parent) = $hash_parents[0];
5350
5351         my $is_combined = (@hash_parents > 1);
5352         my $patch_idx = 0;
5353         my $patch_number = 0;
5354         my $patch_line;
5355         my $diffinfo;
5356         my $to_name;
5357         my (%from, %to);
5358         my @chunk; # for side-by-side diff
5359
5360         print "<div class=\"patchset\">\n";
5361
5362         # skip to first patch
5363         while ($patch_line = <$fd>) {
5364                 chomp $patch_line;
5365
5366                 last if ($patch_line =~ m/^diff /);
5367         }
5368
5369  PATCH:
5370         while ($patch_line) {
5371
5372                 # parse "git diff" header line
5373                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5374                         # $1 is from_name, which we do not use
5375                         $to_name = unquote($2);
5376                         $to_name =~ s!^b/!!;
5377                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5378                         # $1 is 'cc' or 'combined', which we do not use
5379                         $to_name = unquote($2);
5380                 } else {
5381                         $to_name = undef;
5382                 }
5383
5384                 # check if current patch belong to current raw line
5385                 # and parse raw git-diff line if needed
5386                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5387                         # this is continuation of a split patch
5388                         print "<div class=\"patch cont\">\n";
5389                 } else {
5390                         # advance raw git-diff output if needed
5391                         $patch_idx++ if defined $diffinfo;
5392
5393                         # read and prepare patch information
5394                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5395
5396                         # compact combined diff output can have some patches skipped
5397                         # find which patch (using pathname of result) we are at now;
5398                         if ($is_combined) {
5399                                 while ($to_name ne $diffinfo->{'to_file'}) {
5400                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5401                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5402                                               "</div>\n";  # class="patch"
5403
5404                                         $patch_idx++;
5405                                         $patch_number++;
5406
5407                                         last if $patch_idx > $#$difftree;
5408                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5409                                 }
5410                         }
5411
5412                         # modifies %from, %to hashes
5413                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5414
5415                         # this is first patch for raw difftree line with $patch_idx index
5416                         # we index @$difftree array from 0, but number patches from 1
5417                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5418                 }
5419
5420                 # git diff header
5421                 #assert($patch_line =~ m/^diff /) if DEBUG;
5422                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5423                 $patch_number++;
5424                 # print "git diff" header
5425                 print format_git_diff_header_line($patch_line, $diffinfo,
5426                                                   \%from, \%to);
5427
5428                 # print extended diff header
5429                 print "<div class=\"diff extended_header\">\n";
5430         EXTENDED_HEADER:
5431                 while ($patch_line = <$fd>) {
5432                         chomp $patch_line;
5433
5434                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5435
5436                         print format_extended_diff_header_line($patch_line, $diffinfo,
5437                                                                \%from, \%to);
5438                 }
5439                 print "</div>\n"; # class="diff extended_header"
5440
5441                 # from-file/to-file diff header
5442                 if (! $patch_line) {
5443                         print "</div>\n"; # class="patch"
5444                         last PATCH;
5445                 }
5446                 next PATCH if ($patch_line =~ m/^diff /);
5447                 #assert($patch_line =~ m/^---/) if DEBUG;
5448
5449                 my $last_patch_line = $patch_line;
5450                 $patch_line = <$fd>;
5451                 chomp $patch_line;
5452                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5453
5454                 print format_diff_from_to_header($last_patch_line, $patch_line,
5455                                                  $diffinfo, \%from, \%to,
5456                                                  @hash_parents);
5457
5458                 # the patch itself
5459         LINE:
5460                 while ($patch_line = <$fd>) {
5461                         chomp $patch_line;
5462
5463                         next PATCH if ($patch_line =~ m/^diff /);
5464
5465                         my $class = diff_line_class($patch_line, \%from, \%to);
5466
5467                         if ($class eq 'chunk_header') {
5468                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5469                                 @chunk = ();
5470                         }
5471
5472                         push @chunk, [ $class, $patch_line ];
5473                 }
5474
5475         } continue {
5476                 if (@chunk) {
5477                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5478                         @chunk = ();
5479                 }
5480                 print "</div>\n"; # class="patch"
5481         }
5482
5483         # for compact combined (--cc) format, with chunk and patch simplification
5484         # the patchset might be empty, but there might be unprocessed raw lines
5485         for (++$patch_idx if $patch_number > 0;
5486              $patch_idx < @$difftree;
5487              ++$patch_idx) {
5488                 # read and prepare patch information
5489                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5490
5491                 # generate anchor for "patch" links in difftree / whatchanged part
5492                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5493                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5494                       "</div>\n";  # class="patch"
5495
5496                 $patch_number++;
5497         }
5498
5499         if ($patch_number == 0) {
5500                 if (@hash_parents > 1) {
5501                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5502                 } else {
5503                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5504                 }
5505         }
5506
5507         print "</div>\n"; # class="patchset"
5508 }
5509
5510 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5511
5512 sub git_project_search_form {
5513         my ($searchtext, $search_use_regexp) = @_;
5514
5515         my $limit = '';
5516         if ($project_filter) {
5517                 $limit = " in '$project_filter/'";
5518         }
5519
5520         print "<div class=\"projsearch\">\n";
5521         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5522               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5523         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5524                 if (defined $project_filter);
5525         print $cgi->textfield(-name => 's', -value => $searchtext,
5526                               -title => "Search project by name and description$limit",
5527                               -size => 60) . "\n" .
5528               "<span title=\"Extended regular expression\">" .
5529               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5530                              -checked => $search_use_regexp) .
5531               "</span>\n" .
5532               $cgi->submit(-name => 'btnS', -value => 'Search') .
5533               $cgi->end_form() . "\n" .
5534               $cgi->a({-href => href(project => undef, searchtext => undef,
5535                                      project_filter => $project_filter)},
5536                       esc_html("List all projects$limit")) . "<br />\n";
5537         print "</div>\n";
5538 }
5539
5540 # entry for given @keys needs filling if at least one of keys in list
5541 # is not present in %$project_info
5542 sub project_info_needs_filling {
5543         my ($project_info, @keys) = @_;
5544
5545         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5546         foreach my $key (@keys) {
5547                 if (!exists $project_info->{$key}) {
5548                         return 1;
5549                 }
5550         }
5551         return;
5552 }
5553
5554 # fills project list info (age, description, owner, category, forks, etc.)
5555 # for each project in the list, removing invalid projects from
5556 # returned list, or fill only specified info.
5557 #
5558 # Invalid projects are removed from the returned list if and only if you
5559 # ask 'age' or 'age_string' to be filled, because they are the only fields
5560 # that run unconditionally git command that requires repository, and
5561 # therefore do always check if project repository is invalid.
5562 #
5563 # USAGE:
5564 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5565 #   ensures that 'descr_long' and 'ctags' fields are filled
5566 # * @project_list = fill_project_list_info(\@project_list)
5567 #   ensures that all fields are filled (and invalid projects removed)
5568 #
5569 # NOTE: modifies $projlist, but does not remove entries from it
5570 sub fill_project_list_info {
5571         my ($projlist, @wanted_keys) = @_;
5572         my @projects;
5573         my $filter_set = sub { return @_; };
5574         if (@wanted_keys) {
5575                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5576                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5577         }
5578
5579         my $show_ctags = gitweb_check_feature('ctags');
5580  PROJECT:
5581         foreach my $pr (@$projlist) {
5582                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5583                         my (@activity) = git_get_last_activity($pr->{'path'});
5584                         unless (@activity) {
5585                                 next PROJECT;
5586                         }
5587                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5588                 }
5589                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5590                         my $descr = git_get_project_description($pr->{'path'}) || "";
5591                         $descr = to_utf8($descr);
5592                         $pr->{'descr_long'} = $descr;
5593                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5594                 }
5595                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5596                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5597                 }
5598                 if ($show_ctags &&
5599                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5600                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5601                 }
5602                 if ($projects_list_group_categories &&
5603                     project_info_needs_filling($pr, $filter_set->('category'))) {
5604                         my $cat = git_get_project_category($pr->{'path'}) ||
5605                                                            $project_list_default_category;
5606                         $pr->{'category'} = to_utf8($cat);
5607                 }
5608
5609                 push @projects, $pr;
5610         }
5611
5612         return @projects;
5613 }
5614
5615 sub sort_projects_list {
5616         my ($projlist, $order) = @_;
5617
5618         sub order_str {
5619                 my $key = shift;
5620                 return sub { $a->{$key} cmp $b->{$key} };
5621         }
5622
5623         sub order_num_then_undef {
5624                 my $key = shift;
5625                 return sub {
5626                         defined $a->{$key} ?
5627                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5628                                 (defined $b->{$key} ? 1 : 0)
5629                 };
5630         }
5631
5632         my %orderings = (
5633                 project => order_str('path'),
5634                 descr => order_str('descr_long'),
5635                 owner => order_str('owner'),
5636                 age => order_num_then_undef('age'),
5637         );
5638
5639         my $ordering = $orderings{$order};
5640         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5641 }
5642
5643 # returns a hash of categories, containing the list of project
5644 # belonging to each category
5645 sub build_projlist_by_category {
5646         my ($projlist, $from, $to) = @_;
5647         my %categories;
5648
5649         $from = 0 unless defined $from;
5650         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5651
5652         for (my $i = $from; $i <= $to; $i++) {
5653                 my $pr = $projlist->[$i];
5654                 push @{$categories{ $pr->{'category'} }}, $pr;
5655         }
5656
5657         return wantarray ? %categories : \%categories;
5658 }
5659
5660 # print 'sort by' <th> element, generating 'sort by $name' replay link
5661 # if that order is not selected
5662 sub print_sort_th {
5663         print format_sort_th(@_);
5664 }
5665
5666 sub format_sort_th {
5667         my ($name, $order, $header) = @_;
5668         my $sort_th = "";
5669         $header ||= ucfirst($name);
5670
5671         if ($order eq $name) {
5672                 $sort_th .= "<th>$header</th>\n";
5673         } else {
5674                 $sort_th .= "<th>" .
5675                             $cgi->a({-href => href(-replay=>1, order=>$name),
5676                                      -class => "header"}, $header) .
5677                             "</th>\n";
5678         }
5679
5680         return $sort_th;
5681 }
5682
5683 sub git_project_list_rows {
5684         my ($projlist, $from, $to, $check_forks) = @_;
5685
5686         $from = 0 unless defined $from;
5687         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5688
5689         my $alternate = 1;
5690         for (my $i = $from; $i <= $to; $i++) {
5691                 my $pr = $projlist->[$i];
5692
5693                 if ($alternate) {
5694                         print "<tr class=\"dark\">\n";
5695                 } else {
5696                         print "<tr class=\"light\">\n";
5697                 }
5698                 $alternate ^= 1;
5699
5700                 if ($check_forks) {
5701                         print "<td>";
5702                         if ($pr->{'forks'}) {
5703                                 my $nforks = scalar @{$pr->{'forks'}};
5704                                 if ($nforks > 0) {
5705                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5706                                                        -title => "$nforks forks"}, "+");
5707                                 } else {
5708                                         print $cgi->span({-title => "$nforks forks"}, "+");
5709                                 }
5710                         }
5711                         print "</td>\n";
5712                 }
5713                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5714                                         -class => "list"},
5715                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5716                       "</td>\n" .
5717                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5718                                         -class => "list",
5719                                         -title => $pr->{'descr_long'}},
5720                                         $search_regexp
5721                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5722                                                                     $pr->{'descr'}, $search_regexp)
5723                                         : esc_html($pr->{'descr'})) .
5724                       "</td>\n";
5725                 unless ($omit_owner) {
5726                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5727                 }
5728                 unless ($omit_age_column) {
5729                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5730                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5731                 }
5732                 print"<td class=\"link\">" .
5733                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5734                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5735                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5736                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5737                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5738                       "</td>\n" .
5739                       "</tr>\n";
5740         }
5741 }
5742
5743 sub git_project_list_body {
5744         # actually uses global variable $project
5745         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5746         my @projects = @$projlist;
5747
5748         my $check_forks = gitweb_check_feature('forks');
5749         my $show_ctags  = gitweb_check_feature('ctags');
5750         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5751         $check_forks = undef
5752                 if ($tagfilter || $search_regexp);
5753
5754         # filtering out forks before filling info allows to do less work
5755         @projects = filter_forks_from_projects_list(\@projects)
5756                 if ($check_forks);
5757         # search_projects_list pre-fills required info
5758         @projects = search_projects_list(\@projects,
5759                                          'search_regexp' => $search_regexp,
5760                                          'tagfilter'  => $tagfilter)
5761                 if ($tagfilter || $search_regexp);
5762         # fill the rest
5763         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5764         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5765         push @all_fields, 'owner' unless($omit_owner);
5766         @projects = fill_project_list_info(\@projects, @all_fields);
5767
5768         $order ||= $default_projects_order;
5769         $from = 0 unless defined $from;
5770         $to = $#projects if (!defined $to || $#projects < $to);
5771
5772         # short circuit
5773         if ($from > $to) {
5774                 print "<center>\n".
5775                       "<b>No such projects found</b><br />\n".
5776                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5777                       "</center>\n<br />\n";
5778                 return;
5779         }
5780
5781         @projects = sort_projects_list(\@projects, $order);
5782
5783         if ($show_ctags) {
5784                 my $ctags = git_gather_all_ctags(\@projects);
5785                 my $cloud = git_populate_project_tagcloud($ctags);
5786                 print git_show_project_tagcloud($cloud, 64);
5787         }
5788
5789         print "<table class=\"project_list\">\n";
5790         unless ($no_header) {
5791                 print "<tr>\n";
5792                 if ($check_forks) {
5793                         print "<th></th>\n";
5794                 }
5795                 print_sort_th('project', $order, 'Project');
5796                 print_sort_th('descr', $order, 'Description');
5797                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5798                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5799                 print "<th></th>\n" . # for links
5800                       "</tr>\n";
5801         }
5802
5803         if ($projects_list_group_categories) {
5804                 # only display categories with projects in the $from-$to window
5805                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5806                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5807                 foreach my $cat (sort keys %categories) {
5808                         unless ($cat eq "") {
5809                                 print "<tr>\n";
5810                                 if ($check_forks) {
5811                                         print "<td></td>\n";
5812                                 }
5813                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5814                                 print "</tr>\n";
5815                         }
5816
5817                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5818                 }
5819         } else {
5820                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5821         }
5822
5823         if (defined $extra) {
5824                 print "<tr>\n";
5825                 if ($check_forks) {
5826                         print "<td></td>\n";
5827                 }
5828                 print "<td colspan=\"5\">$extra</td>\n" .
5829                       "</tr>\n";
5830         }
5831         print "</table>\n";
5832 }
5833
5834 sub git_log_body {
5835         # uses global variable $project
5836         my ($commitlist, $from, $to, $refs, $extra) = @_;
5837
5838         $from = 0 unless defined $from;
5839         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5840
5841         for (my $i = 0; $i <= $to; $i++) {
5842                 my %co = %{$commitlist->[$i]};
5843                 next if !%co;
5844                 my $commit = $co{'id'};
5845                 my $ref = format_ref_marker($refs, $commit);
5846                 git_print_header_div('commit',
5847                                "<span class=\"age\">$co{'age_string'}</span>" .
5848                                esc_html($co{'title'}) . $ref,
5849                                $commit);
5850                 print "<div class=\"title_text\">\n" .
5851                       "<div class=\"log_link\">\n" .
5852                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5853                       " | " .
5854                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5855                       " | " .
5856                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5857                       "<br/>\n" .
5858                       "</div>\n";
5859                       git_print_authorship(\%co, -tag => 'span');
5860                       print "<br/>\n</div>\n";
5861
5862                 print "<div class=\"log_body\">\n";
5863                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5864                 print "</div>\n";
5865         }
5866         if ($extra) {
5867                 print "<div class=\"page_nav\">\n";
5868                 print "$extra\n";
5869                 print "</div>\n";
5870         }
5871 }
5872
5873 sub git_shortlog_body {
5874         # uses global variable $project
5875         my ($commitlist, $from, $to, $refs, $extra) = @_;
5876
5877         $from = 0 unless defined $from;
5878         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5879
5880         print "<table class=\"shortlog\">\n";
5881         my $alternate = 1;
5882         for (my $i = $from; $i <= $to; $i++) {
5883                 my %co = %{$commitlist->[$i]};
5884                 my $commit = $co{'id'};
5885                 my $ref = format_ref_marker($refs, $commit);
5886                 if ($alternate) {
5887                         print "<tr class=\"dark\">\n";
5888                 } else {
5889                         print "<tr class=\"light\">\n";
5890                 }
5891                 $alternate ^= 1;
5892                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5893                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5894                       format_author_html('td', \%co, 10) . "<td>";
5895                 print format_subject_html($co{'title'}, $co{'title_short'},
5896                                           href(action=>"commit", hash=>$commit), $ref);
5897                 print "</td>\n" .
5898                       "<td class=\"link\">" .
5899                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5900                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5901                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5902                 my $snapshot_links = format_snapshot_links($commit);
5903                 if (defined $snapshot_links) {
5904                         print " | " . $snapshot_links;
5905                 }
5906                 print "</td>\n" .
5907                       "</tr>\n";
5908         }
5909         if (defined $extra) {
5910                 print "<tr>\n" .
5911                       "<td colspan=\"4\">$extra</td>\n" .
5912                       "</tr>\n";
5913         }
5914         print "</table>\n";
5915 }
5916
5917 sub git_history_body {
5918         # Warning: assumes constant type (blob or tree) during history
5919         my ($commitlist, $from, $to, $refs, $extra,
5920             $file_name, $file_hash, $ftype) = @_;
5921
5922         $from = 0 unless defined $from;
5923         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5924
5925         print "<table class=\"history\">\n";
5926         my $alternate = 1;
5927         for (my $i = $from; $i <= $to; $i++) {
5928                 my %co = %{$commitlist->[$i]};
5929                 if (!%co) {
5930                         next;
5931                 }
5932                 my $commit = $co{'id'};
5933
5934                 my $ref = format_ref_marker($refs, $commit);
5935
5936                 if ($alternate) {
5937                         print "<tr class=\"dark\">\n";
5938                 } else {
5939                         print "<tr class=\"light\">\n";
5940                 }
5941                 $alternate ^= 1;
5942                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5943         # shortlog:   format_author_html('td', \%co, 10)
5944                       format_author_html('td', \%co, 15, 3) . "<td>";
5945                 # originally git_history used chop_str($co{'title'}, 50)
5946                 print format_subject_html($co{'title'}, $co{'title_short'},
5947                                           href(action=>"commit", hash=>$commit), $ref);
5948                 print "</td>\n" .
5949                       "<td class=\"link\">" .
5950                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5951                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5952
5953                 if ($ftype eq 'blob') {
5954                         my $blob_current = $file_hash;
5955                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5956                         if (defined $blob_current && defined $blob_parent &&
5957                                         $blob_current ne $blob_parent) {
5958                                 print " | " .
5959                                         $cgi->a({-href => href(action=>"blobdiff",
5960                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5961                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5962                                                                file_name=>$file_name)},
5963                                                 "diff to current");
5964                         }
5965                 }
5966                 print "</td>\n" .
5967                       "</tr>\n";
5968         }
5969         if (defined $extra) {
5970                 print "<tr>\n" .
5971                       "<td colspan=\"4\">$extra</td>\n" .
5972                       "</tr>\n";
5973         }
5974         print "</table>\n";
5975 }
5976
5977 sub git_tags_body {
5978         # uses global variable $project
5979         my ($taglist, $from, $to, $extra) = @_;
5980         $from = 0 unless defined $from;
5981         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5982
5983         print "<table class=\"tags\">\n";
5984         my $alternate = 1;
5985         for (my $i = $from; $i <= $to; $i++) {
5986                 my $entry = $taglist->[$i];
5987                 my %tag = %$entry;
5988                 my $comment = $tag{'subject'};
5989                 my $comment_short;
5990                 if (defined $comment) {
5991                         $comment_short = chop_str($comment, 30, 5);
5992                 }
5993                 if ($alternate) {
5994                         print "<tr class=\"dark\">\n";
5995                 } else {
5996                         print "<tr class=\"light\">\n";
5997                 }
5998                 $alternate ^= 1;
5999                 if (defined $tag{'age'}) {
6000                         print "<td><i>$tag{'age'}</i></td>\n";
6001                 } else {
6002                         print "<td></td>\n";
6003                 }
6004                 print "<td>" .
6005                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6006                                -class => "list name"}, esc_html($tag{'name'})) .
6007                       "</td>\n" .
6008                       "<td>";
6009                 if (defined $comment) {
6010                         print format_subject_html($comment, $comment_short,
6011                                                   href(action=>"tag", hash=>$tag{'id'}));
6012                 }
6013                 print "</td>\n" .
6014                       "<td class=\"selflink\">";
6015                 if ($tag{'type'} eq "tag") {
6016                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6017                 } else {
6018                         print "&nbsp;";
6019                 }
6020                 print "</td>\n" .
6021                       "<td class=\"link\">" . " | " .
6022                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6023                 if ($tag{'reftype'} eq "commit") {
6024                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6025                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6026                 } elsif ($tag{'reftype'} eq "blob") {
6027                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6028                 }
6029                 print "</td>\n" .
6030                       "</tr>";
6031         }
6032         if (defined $extra) {
6033                 print "<tr>\n" .
6034                       "<td colspan=\"5\">$extra</td>\n" .
6035                       "</tr>\n";
6036         }
6037         print "</table>\n";
6038 }
6039
6040 sub git_heads_body {
6041         # uses global variable $project
6042         my ($headlist, $head_at, $from, $to, $extra) = @_;
6043         $from = 0 unless defined $from;
6044         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6045
6046         print "<table class=\"heads\">\n";
6047         my $alternate = 1;
6048         for (my $i = $from; $i <= $to; $i++) {
6049                 my $entry = $headlist->[$i];
6050                 my %ref = %$entry;
6051                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6052                 if ($alternate) {
6053                         print "<tr class=\"dark\">\n";
6054                 } else {
6055                         print "<tr class=\"light\">\n";
6056                 }
6057                 $alternate ^= 1;
6058                 print "<td><i>$ref{'age'}</i></td>\n" .
6059                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6060                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6061                                -class => "list name"},esc_html($ref{'name'})) .
6062                       "</td>\n" .
6063                       "<td class=\"link\">" .
6064                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6065                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6066                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6067                       "</td>\n" .
6068                       "</tr>";
6069         }
6070         if (defined $extra) {
6071                 print "<tr>\n" .
6072                       "<td colspan=\"3\">$extra</td>\n" .
6073                       "</tr>\n";
6074         }
6075         print "</table>\n";
6076 }
6077
6078 # Display a single remote block
6079 sub git_remote_block {
6080         my ($remote, $rdata, $limit, $head) = @_;
6081
6082         my $heads = $rdata->{'heads'};
6083         my $fetch = $rdata->{'fetch'};
6084         my $push = $rdata->{'push'};
6085
6086         my $urls_table = "<table class=\"projects_list\">\n" ;
6087
6088         if (defined $fetch) {
6089                 if ($fetch eq $push) {
6090                         $urls_table .= format_repo_url("URL", $fetch);
6091                 } else {
6092                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6093                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6094                 }
6095         } elsif (defined $push) {
6096                 $urls_table .= format_repo_url("Push URL", $push);
6097         } else {
6098                 $urls_table .= format_repo_url("", "No remote URL");
6099         }
6100
6101         $urls_table .= "</table>\n";
6102
6103         my $dots;
6104         if (defined $limit && $limit < @$heads) {
6105                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6106         }
6107
6108         print $urls_table;
6109         git_heads_body($heads, $head, 0, $limit, $dots);
6110 }
6111
6112 # Display a list of remote names with the respective fetch and push URLs
6113 sub git_remotes_list {
6114         my ($remotedata, $limit) = @_;
6115         print "<table class=\"heads\">\n";
6116         my $alternate = 1;
6117         my @remotes = sort keys %$remotedata;
6118
6119         my $limited = $limit && $limit < @remotes;
6120
6121         $#remotes = $limit - 1 if $limited;
6122
6123         while (my $remote = shift @remotes) {
6124                 my $rdata = $remotedata->{$remote};
6125                 my $fetch = $rdata->{'fetch'};
6126                 my $push = $rdata->{'push'};
6127                 if ($alternate) {
6128                         print "<tr class=\"dark\">\n";
6129                 } else {
6130                         print "<tr class=\"light\">\n";
6131                 }
6132                 $alternate ^= 1;
6133                 print "<td>" .
6134                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6135                                -class=> "list name"},esc_html($remote)) .
6136                       "</td>";
6137                 print "<td class=\"link\">" .
6138                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6139                       " | " .
6140                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6141                       "</td>";
6142
6143                 print "</tr>\n";
6144         }
6145
6146         if ($limited) {
6147                 print "<tr>\n" .
6148                       "<td colspan=\"3\">" .
6149                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6150                       "</td>\n" . "</tr>\n";
6151         }
6152
6153         print "</table>";
6154 }
6155
6156 # Display remote heads grouped by remote, unless there are too many
6157 # remotes, in which case we only display the remote names
6158 sub git_remotes_body {
6159         my ($remotedata, $limit, $head) = @_;
6160         if ($limit and $limit < keys %$remotedata) {
6161                 git_remotes_list($remotedata, $limit);
6162         } else {
6163                 fill_remote_heads($remotedata);
6164                 while (my ($remote, $rdata) = each %$remotedata) {
6165                         git_print_section({-class=>"remote", -id=>$remote},
6166                                 ["remotes", $remote, $remote], sub {
6167                                         git_remote_block($remote, $rdata, $limit, $head);
6168                                 });
6169                 }
6170         }
6171 }
6172
6173 sub git_search_message {
6174         my %co = @_;
6175
6176         my $greptype;
6177         if ($searchtype eq 'commit') {
6178                 $greptype = "--grep=";
6179         } elsif ($searchtype eq 'author') {
6180                 $greptype = "--author=";
6181         } elsif ($searchtype eq 'committer') {
6182                 $greptype = "--committer=";
6183         }
6184         $greptype .= $searchtext;
6185         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6186                                        $greptype, '--regexp-ignore-case',
6187                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6188
6189         my $paging_nav = '';
6190         if ($page > 0) {
6191                 $paging_nav .=
6192                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6193                                 "first") .
6194                         " &sdot; " .
6195                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6196                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6197         } else {
6198                 $paging_nav .= "first &sdot; prev";
6199         }
6200         my $next_link = '';
6201         if ($#commitlist >= 100) {
6202                 $next_link =
6203                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6204                                  -accesskey => "n", -title => "Alt-n"}, "next");
6205                 $paging_nav .= " &sdot; $next_link";
6206         } else {
6207                 $paging_nav .= " &sdot; next";
6208         }
6209
6210         git_header_html();
6211
6212         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6213         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6214         if ($page == 0 && !@commitlist) {
6215                 print "<p>No match.</p>\n";
6216         } else {
6217                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6218         }
6219
6220         git_footer_html();
6221 }
6222
6223 sub git_search_changes {
6224         my %co = @_;
6225
6226         local $/ = "\n";
6227         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6228                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6229                 ($search_use_regexp ? '--pickaxe-regex' : ())
6230                         or die_error(500, "Open git-log failed");
6231
6232         git_header_html();
6233
6234         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6235         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6236
6237         print "<table class=\"pickaxe search\">\n";
6238         my $alternate = 1;
6239         undef %co;
6240         my @files;
6241         while (my $line = <$fd>) {
6242                 chomp $line;
6243                 next unless $line;
6244
6245                 my %set = parse_difftree_raw_line($line);
6246                 if (defined $set{'commit'}) {
6247                         # finish previous commit
6248                         if (%co) {
6249                                 print "</td>\n" .
6250                                       "<td class=\"link\">" .
6251                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6252                                               "commit") .
6253                                       " | " .
6254                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6255                                                              hash_base=>$co{'id'})},
6256                                               "tree") .
6257                                       "</td>\n" .
6258                                       "</tr>\n";
6259                         }
6260
6261                         if ($alternate) {
6262                                 print "<tr class=\"dark\">\n";
6263                         } else {
6264                                 print "<tr class=\"light\">\n";
6265                         }
6266                         $alternate ^= 1;
6267                         %co = parse_commit($set{'commit'});
6268                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6269                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6270                               "<td><i>$author</i></td>\n" .
6271                               "<td>" .
6272                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6273                                       -class => "list subject"},
6274                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6275                 } elsif (defined $set{'to_id'}) {
6276                         next if ($set{'to_id'} =~ m/^0{40}$/);
6277
6278                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6279                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6280                                       -class => "list"},
6281                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6282                               "<br/>\n";
6283                 }
6284         }
6285         close $fd;
6286
6287         # finish last commit (warning: repetition!)
6288         if (%co) {
6289                 print "</td>\n" .
6290                       "<td class=\"link\">" .
6291                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6292                               "commit") .
6293                       " | " .
6294                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6295                                              hash_base=>$co{'id'})},
6296                               "tree") .
6297                       "</td>\n" .
6298                       "</tr>\n";
6299         }
6300
6301         print "</table>\n";
6302
6303         git_footer_html();
6304 }
6305
6306 sub git_search_files {
6307         my %co = @_;
6308
6309         local $/ = "\n";
6310         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6311                 $search_use_regexp ? ('-E', '-i') : '-F',
6312                 $searchtext, $co{'tree'}
6313                         or die_error(500, "Open git-grep failed");
6314
6315         git_header_html();
6316
6317         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6318         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6319
6320         print "<table class=\"grep_search\">\n";
6321         my $alternate = 1;
6322         my $matches = 0;
6323         my $lastfile = '';
6324         my $file_href;
6325         while (my $line = <$fd>) {
6326                 chomp $line;
6327                 my ($file, $lno, $ltext, $binary);
6328                 last if ($matches++ > 1000);
6329                 if ($line =~ /^Binary file (.+) matches$/) {
6330                         $file = $1;
6331                         $binary = 1;
6332                 } else {
6333                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6334                         $file =~ s/^$co{'tree'}://;
6335                 }
6336                 if ($file ne $lastfile) {
6337                         $lastfile and print "</td></tr>\n";
6338                         if ($alternate++) {
6339                                 print "<tr class=\"dark\">\n";
6340                         } else {
6341                                 print "<tr class=\"light\">\n";
6342                         }
6343                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6344                                           file_name=>$file);
6345                         print "<td class=\"list\">".
6346                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6347                         print "</td><td>\n";
6348                         $lastfile = $file;
6349                 }
6350                 if ($binary) {
6351                         print "<div class=\"binary\">Binary file</div>\n";
6352                 } else {
6353                         $ltext = untabify($ltext);
6354                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6355                                 $ltext = esc_html($1, -nbsp=>1);
6356                                 $ltext .= '<span class="match">';
6357                                 $ltext .= esc_html($2, -nbsp=>1);
6358                                 $ltext .= '</span>';
6359                                 $ltext .= esc_html($3, -nbsp=>1);
6360                         } else {
6361                                 $ltext = esc_html($ltext, -nbsp=>1);
6362                         }
6363                         print "<div class=\"pre\">" .
6364                                 $cgi->a({-href => $file_href.'#l'.$lno,
6365                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6366                                 ' ' .  $ltext . "</div>\n";
6367                 }
6368         }
6369         if ($lastfile) {
6370                 print "</td></tr>\n";
6371                 if ($matches > 1000) {
6372                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6373                 }
6374         } else {
6375                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6376         }
6377         close $fd;
6378
6379         print "</table>\n";
6380
6381         git_footer_html();
6382 }
6383
6384 sub git_search_grep_body {
6385         my ($commitlist, $from, $to, $extra) = @_;
6386         $from = 0 unless defined $from;
6387         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6388
6389         print "<table class=\"commit_search\">\n";
6390         my $alternate = 1;
6391         for (my $i = $from; $i <= $to; $i++) {
6392                 my %co = %{$commitlist->[$i]};
6393                 if (!%co) {
6394                         next;
6395                 }
6396                 my $commit = $co{'id'};
6397                 if ($alternate) {
6398                         print "<tr class=\"dark\">\n";
6399                 } else {
6400                         print "<tr class=\"light\">\n";
6401                 }
6402                 $alternate ^= 1;
6403                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6404                       format_author_html('td', \%co, 15, 5) .
6405                       "<td>" .
6406                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6407                                -class => "list subject"},
6408                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6409                 my $comment = $co{'comment'};
6410                 foreach my $line (@$comment) {
6411                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6412                                 my ($lead, $match, $trail) = ($1, $2, $3);
6413                                 $match = chop_str($match, 70, 5, 'center');
6414                                 my $contextlen = int((80 - length($match))/2);
6415                                 $contextlen = 30 if ($contextlen > 30);
6416                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6417                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6418
6419                                 $lead  = esc_html($lead);
6420                                 $match = esc_html($match);
6421                                 $trail = esc_html($trail);
6422
6423                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6424                         }
6425                 }
6426                 print "</td>\n" .
6427                       "<td class=\"link\">" .
6428                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6429                       " | " .
6430                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6431                       " | " .
6432                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6433                 print "</td>\n" .
6434                       "</tr>\n";
6435         }
6436         if (defined $extra) {
6437                 print "<tr>\n" .
6438                       "<td colspan=\"3\">$extra</td>\n" .
6439                       "</tr>\n";
6440         }
6441         print "</table>\n";
6442 }
6443
6444 ## ======================================================================
6445 ## ======================================================================
6446 ## actions
6447
6448 sub git_project_list {
6449         my $order = $input_params{'order'};
6450         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6451                 die_error(400, "Unknown order parameter");
6452         }
6453
6454         my @list = git_get_projects_list($project_filter, $strict_export);
6455         if (!@list) {
6456                 die_error(404, "No projects found");
6457         }
6458
6459         git_header_html();
6460         if (defined $home_text && -f $home_text) {
6461                 print "<div class=\"index_include\">\n";
6462                 insert_file($home_text);
6463                 print "</div>\n";
6464         }
6465
6466         git_project_search_form($searchtext, $search_use_regexp);
6467         git_project_list_body(\@list, $order);
6468         git_footer_html();
6469 }
6470
6471 sub git_forks {
6472         my $order = $input_params{'order'};
6473         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6474                 die_error(400, "Unknown order parameter");
6475         }
6476
6477         my $filter = $project;
6478         $filter =~ s/\.git$//;
6479         my @list = git_get_projects_list($filter);
6480         if (!@list) {
6481                 die_error(404, "No forks found");
6482         }
6483
6484         git_header_html();
6485         git_print_page_nav('','');
6486         git_print_header_div('summary', "$project forks");
6487         git_project_list_body(\@list, $order);
6488         git_footer_html();
6489 }
6490
6491 sub git_project_index {
6492         my @projects = git_get_projects_list($project_filter, $strict_export);
6493         if (!@projects) {
6494                 die_error(404, "No projects found");
6495         }
6496
6497         print $cgi->header(
6498                 -type => 'text/plain',
6499                 -charset => 'utf-8',
6500                 -content_disposition => 'inline; filename="index.aux"');
6501
6502         foreach my $pr (@projects) {
6503                 if (!exists $pr->{'owner'}) {
6504                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6505                 }
6506
6507                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6508                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6509                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6510                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6511                 $path  =~ s/ /\+/g;
6512                 $owner =~ s/ /\+/g;
6513
6514                 print "$path $owner\n";
6515         }
6516 }
6517
6518 sub git_summary {
6519         my $descr = git_get_project_description($project) || "none";
6520         my %co = parse_commit("HEAD");
6521         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6522         my $head = $co{'id'};
6523         my $remote_heads = gitweb_check_feature('remote_heads');
6524
6525         my $owner = git_get_project_owner($project);
6526
6527         my $refs = git_get_references();
6528         # These get_*_list functions return one more to allow us to see if
6529         # there are more ...
6530         my @taglist  = git_get_tags_list(16);
6531         my @headlist = git_get_heads_list(16);
6532         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6533         my @forklist;
6534         my $check_forks = gitweb_check_feature('forks');
6535
6536         if ($check_forks) {
6537                 # find forks of a project
6538                 my $filter = $project;
6539                 $filter =~ s/\.git$//;
6540                 @forklist = git_get_projects_list($filter);
6541                 # filter out forks of forks
6542                 @forklist = filter_forks_from_projects_list(\@forklist)
6543                         if (@forklist);
6544         }
6545
6546         git_header_html();
6547         git_print_page_nav('summary','', $head);
6548
6549         print "<div class=\"title\">&nbsp;</div>\n";
6550         print "<table class=\"projects_list\">\n" .
6551               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6552         if ($owner and not $omit_owner) {
6553                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6554         }
6555         if (defined $cd{'rfc2822'}) {
6556                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6557                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6558         }
6559
6560         # use per project git URL list in $projectroot/$project/cloneurl
6561         # or make project git URL from git base URL and project name
6562         my $url_tag = "URL";
6563         my @url_list = git_get_project_url_list($project);
6564         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6565         foreach my $git_url (@url_list) {
6566                 next unless $git_url;
6567                 print format_repo_url($url_tag, $git_url);
6568                 $url_tag = "";
6569         }
6570
6571         # Tag cloud
6572         my $show_ctags = gitweb_check_feature('ctags');
6573         if ($show_ctags) {
6574                 my $ctags = git_get_project_ctags($project);
6575                 if (%$ctags) {
6576                         # without ability to add tags, don't show if there are none
6577                         my $cloud = git_populate_project_tagcloud($ctags);
6578                         print "<tr id=\"metadata_ctags\">" .
6579                               "<td>content tags</td>" .
6580                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6581                               "</tr>\n";
6582                 }
6583         }
6584
6585         print "</table>\n";
6586
6587         # If XSS prevention is on, we don't include README.html.
6588         # TODO: Allow a readme in some safe format.
6589         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6590                 print "<div class=\"title\">readme</div>\n" .
6591                       "<div class=\"readme\">\n";
6592                 insert_file("$projectroot/$project/README.html");
6593                 print "\n</div>\n"; # class="readme"
6594         }
6595
6596         # we need to request one more than 16 (0..15) to check if
6597         # those 16 are all
6598         my @commitlist = $head ? parse_commits($head, 17) : ();
6599         if (@commitlist) {
6600                 git_print_header_div('shortlog');
6601                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6602                                   $#commitlist <=  15 ? undef :
6603                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6604         }
6605
6606         if (@taglist) {
6607                 git_print_header_div('tags');
6608                 git_tags_body(\@taglist, 0, 15,
6609                               $#taglist <=  15 ? undef :
6610                               $cgi->a({-href => href(action=>"tags")}, "..."));
6611         }
6612
6613         if (@headlist) {
6614                 git_print_header_div('heads');
6615                 git_heads_body(\@headlist, $head, 0, 15,
6616                                $#headlist <= 15 ? undef :
6617                                $cgi->a({-href => href(action=>"heads")}, "..."));
6618         }
6619
6620         if (%remotedata) {
6621                 git_print_header_div('remotes');
6622                 git_remotes_body(\%remotedata, 15, $head);
6623         }
6624
6625         if (@forklist) {
6626                 git_print_header_div('forks');
6627                 git_project_list_body(\@forklist, 'age', 0, 15,
6628                                       $#forklist <= 15 ? undef :
6629                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6630                                       'no_header');
6631         }
6632
6633         git_footer_html();
6634 }
6635
6636 sub git_tag {
6637         my %tag = parse_tag($hash);
6638
6639         if (! %tag) {
6640                 die_error(404, "Unknown tag object");
6641         }
6642
6643         my $head = git_get_head_hash($project);
6644         git_header_html();
6645         git_print_page_nav('','', $head,undef,$head);
6646         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6647         print "<div class=\"title_text\">\n" .
6648               "<table class=\"object_header\">\n" .
6649               "<tr>\n" .
6650               "<td>object</td>\n" .
6651               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6652                                $tag{'object'}) . "</td>\n" .
6653               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6654                                               $tag{'type'}) . "</td>\n" .
6655               "</tr>\n";
6656         if (defined($tag{'author'})) {
6657                 git_print_authorship_rows(\%tag, 'author');
6658         }
6659         print "</table>\n\n" .
6660               "</div>\n";
6661         print "<div class=\"page_body\">";
6662         my $comment = $tag{'comment'};
6663         foreach my $line (@$comment) {
6664                 chomp $line;
6665                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6666         }
6667         print "</div>\n";
6668         git_footer_html();
6669 }
6670
6671 sub git_blame_common {
6672         my $format = shift || 'porcelain';
6673         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6674                 $format = 'incremental';
6675                 $action = 'blame_incremental'; # for page title etc
6676         }
6677
6678         # permissions
6679         gitweb_check_feature('blame')
6680                 or die_error(403, "Blame view not allowed");
6681
6682         # error checking
6683         die_error(400, "No file name given") unless $file_name;
6684         $hash_base ||= git_get_head_hash($project);
6685         die_error(404, "Couldn't find base commit") unless $hash_base;
6686         my %co = parse_commit($hash_base)
6687                 or die_error(404, "Commit not found");
6688         my $ftype = "blob";
6689         if (!defined $hash) {
6690                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6691                         or die_error(404, "Error looking up file");
6692         } else {
6693                 $ftype = git_get_type($hash);
6694                 if ($ftype !~ "blob") {
6695                         die_error(400, "Object is not a blob");
6696                 }
6697         }
6698
6699         my $fd;
6700         if ($format eq 'incremental') {
6701                 # get file contents (as base)
6702                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6703                         or die_error(500, "Open git-cat-file failed");
6704         } elsif ($format eq 'data') {
6705                 # run git-blame --incremental
6706                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6707                         $hash_base, "--", $file_name
6708                         or die_error(500, "Open git-blame --incremental failed");
6709         } else {
6710                 # run git-blame --porcelain
6711                 open $fd, "-|", git_cmd(), "blame", '-p',
6712                         $hash_base, '--', $file_name
6713                         or die_error(500, "Open git-blame --porcelain failed");
6714         }
6715         binmode $fd, ':utf8';
6716
6717         # incremental blame data returns early
6718         if ($format eq 'data') {
6719                 print $cgi->header(
6720                         -type=>"text/plain", -charset => "utf-8",
6721                         -status=> "200 OK");
6722                 local $| = 1; # output autoflush
6723                 while (my $line = <$fd>) {
6724                         print to_utf8($line);
6725                 }
6726                 close $fd
6727                         or print "ERROR $!\n";
6728
6729                 print 'END';
6730                 if (defined $t0 && gitweb_check_feature('timed')) {
6731                         print ' '.
6732                               tv_interval($t0, [ gettimeofday() ]).
6733                               ' '.$number_of_git_cmds;
6734                 }
6735                 print "\n";
6736
6737                 return;
6738         }
6739
6740         # page header
6741         git_header_html();
6742         my $formats_nav =
6743                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6744                         "blob") .
6745                 " | ";
6746         if ($format eq 'incremental') {
6747                 $formats_nav .=
6748                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6749                                 "blame") . " (non-incremental)";
6750         } else {
6751                 $formats_nav .=
6752                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6753                                 "blame") . " (incremental)";
6754         }
6755         $formats_nav .=
6756                 " | " .
6757                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6758                         "history") .
6759                 " | " .
6760                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6761                         "HEAD");
6762         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6763         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6764         git_print_page_path($file_name, $ftype, $hash_base);
6765
6766         # page body
6767         if ($format eq 'incremental') {
6768                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6769                       "This page requires JavaScript to run.\n Use ".
6770                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6771                               'this page').
6772                       " instead.\n".
6773                       "</b></center></div>\n</noscript>\n";
6774
6775                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6776         }
6777
6778         print qq!<div class="page_body">\n!;
6779         print qq!<div id="progress_info">... / ...</div>\n!
6780                 if ($format eq 'incremental');
6781         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6782               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6783               qq!<thead>\n!.
6784               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6785               qq!</thead>\n!.
6786               qq!<tbody>\n!;
6787
6788         my @rev_color = qw(light dark);
6789         my $num_colors = scalar(@rev_color);
6790         my $current_color = 0;
6791
6792         if ($format eq 'incremental') {
6793                 my $color_class = $rev_color[$current_color];
6794
6795                 #contents of a file
6796                 my $linenr = 0;
6797         LINE:
6798                 while (my $line = <$fd>) {
6799                         chomp $line;
6800                         $linenr++;
6801
6802                         print qq!<tr id="l$linenr" class="$color_class">!.
6803                               qq!<td class="sha1"><a href=""> </a></td>!.
6804                               qq!<td class="linenr">!.
6805                               qq!<a class="linenr" href="">$linenr</a></td>!;
6806                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6807                         print qq!</tr>\n!;
6808                 }
6809
6810         } else { # porcelain, i.e. ordinary blame
6811                 my %metainfo = (); # saves information about commits
6812
6813                 # blame data
6814         LINE:
6815                 while (my $line = <$fd>) {
6816                         chomp $line;
6817                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6818                         # no <lines in group> for subsequent lines in group of lines
6819                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6820                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6821                         if (!exists $metainfo{$full_rev}) {
6822                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6823                         }
6824                         my $meta = $metainfo{$full_rev};
6825                         my $data;
6826                         while ($data = <$fd>) {
6827                                 chomp $data;
6828                                 last if ($data =~ s/^\t//); # contents of line
6829                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6830                                         $meta->{$1} = $2 unless exists $meta->{$1};
6831                                 }
6832                                 if ($data =~ /^previous /) {
6833                                         $meta->{'nprevious'}++;
6834                                 }
6835                         }
6836                         my $short_rev = substr($full_rev, 0, 8);
6837                         my $author = $meta->{'author'};
6838                         my %date =
6839                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6840                         my $date = $date{'iso-tz'};
6841                         if ($group_size) {
6842                                 $current_color = ($current_color + 1) % $num_colors;
6843                         }
6844                         my $tr_class = $rev_color[$current_color];
6845                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6846                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6847                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6848                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6849                         if ($group_size) {
6850                                 print "<td class=\"sha1\"";
6851                                 print " title=\"". esc_html($author) . ", $date\"";
6852                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6853                                 print ">";
6854                                 print $cgi->a({-href => href(action=>"commit",
6855                                                              hash=>$full_rev,
6856                                                              file_name=>$file_name)},
6857                                               esc_html($short_rev));
6858                                 if ($group_size >= 2) {
6859                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6860                                         if (@author_initials) {
6861                                                 print "<br />" .
6862                                                       esc_html(join('', @author_initials));
6863                                                 #           or join('.', ...)
6864                                         }
6865                                 }
6866                                 print "</td>\n";
6867                         }
6868                         # 'previous' <sha1 of parent commit> <filename at commit>
6869                         if (exists $meta->{'previous'} &&
6870                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6871                                 $meta->{'parent'} = $1;
6872                                 $meta->{'file_parent'} = unquote($2);
6873                         }
6874                         my $linenr_commit =
6875                                 exists($meta->{'parent'}) ?
6876                                 $meta->{'parent'} : $full_rev;
6877                         my $linenr_filename =
6878                                 exists($meta->{'file_parent'}) ?
6879                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6880                         my $blamed = href(action => 'blame',
6881                                           file_name => $linenr_filename,
6882                                           hash_base => $linenr_commit);
6883                         print "<td class=\"linenr\">";
6884                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6885                                         -class => "linenr" },
6886                                       esc_html($lineno));
6887                         print "</td>";
6888                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6889                         print "</tr>\n";
6890                 } # end while
6891
6892         }
6893
6894         # footer
6895         print "</tbody>\n".
6896               "</table>\n"; # class="blame"
6897         print "</div>\n";   # class="blame_body"
6898         close $fd
6899                 or print "Reading blob failed\n";
6900
6901         git_footer_html();
6902 }
6903
6904 sub git_blame {
6905         git_blame_common();
6906 }
6907
6908 sub git_blame_incremental {
6909         git_blame_common('incremental');
6910 }
6911
6912 sub git_blame_data {
6913         git_blame_common('data');
6914 }
6915
6916 sub git_tags {
6917         my $head = git_get_head_hash($project);
6918         git_header_html();
6919         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6920         git_print_header_div('summary', $project);
6921
6922         my @tagslist = git_get_tags_list();
6923         if (@tagslist) {
6924                 git_tags_body(\@tagslist);
6925         }
6926         git_footer_html();
6927 }
6928
6929 sub git_heads {
6930         my $head = git_get_head_hash($project);
6931         git_header_html();
6932         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6933         git_print_header_div('summary', $project);
6934
6935         my @headslist = git_get_heads_list();
6936         if (@headslist) {
6937                 git_heads_body(\@headslist, $head);
6938         }
6939         git_footer_html();
6940 }
6941
6942 # used both for single remote view and for list of all the remotes
6943 sub git_remotes {
6944         gitweb_check_feature('remote_heads')
6945                 or die_error(403, "Remote heads view is disabled");
6946
6947         my $head = git_get_head_hash($project);
6948         my $remote = $input_params{'hash'};
6949
6950         my $remotedata = git_get_remotes_list($remote);
6951         die_error(500, "Unable to get remote information") unless defined $remotedata;
6952
6953         unless (%$remotedata) {
6954                 die_error(404, defined $remote ?
6955                         "Remote $remote not found" :
6956                         "No remotes found");
6957         }
6958
6959         git_header_html(undef, undef, -action_extra => $remote);
6960         git_print_page_nav('', '',  $head, undef, $head,
6961                 format_ref_views($remote ? '' : 'remotes'));
6962
6963         fill_remote_heads($remotedata);
6964         if (defined $remote) {
6965                 git_print_header_div('remotes', "$remote remote for $project");
6966                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6967         } else {
6968                 git_print_header_div('summary', "$project remotes");
6969                 git_remotes_body($remotedata, undef, $head);
6970         }
6971
6972         git_footer_html();
6973 }
6974
6975 sub git_blob_plain {
6976         my $type = shift;
6977         my $expires;
6978
6979         if (!defined $hash) {
6980                 if (defined $file_name) {
6981                         my $base = $hash_base || git_get_head_hash($project);
6982                         $hash = git_get_hash_by_path($base, $file_name, "blob")
6983                                 or die_error(404, "Cannot find file");
6984                 } else {
6985                         die_error(400, "No file name defined");
6986                 }
6987         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6988                 # blobs defined by non-textual hash id's can be cached
6989                 $expires = "+1d";
6990         }
6991
6992         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
6993                 or die_error(500, "Open git-cat-file blob '$hash' failed");
6994
6995         # content-type (can include charset)
6996         $type = blob_contenttype($fd, $file_name, $type);
6997
6998         # "save as" filename, even when no $file_name is given
6999         my $save_as = "$hash";
7000         if (defined $file_name) {
7001                 $save_as = $file_name;
7002         } elsif ($type =~ m/^text\//) {
7003                 $save_as .= '.txt';
7004         }
7005
7006         # With XSS prevention on, blobs of all types except a few known safe
7007         # ones are served with "Content-Disposition: attachment" to make sure
7008         # they don't run in our security domain.  For certain image types,
7009         # blob view writes an <img> tag referring to blob_plain view, and we
7010         # want to be sure not to break that by serving the image as an
7011         # attachment (though Firefox 3 doesn't seem to care).
7012         my $sandbox = $prevent_xss &&
7013                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7014
7015         # serve text/* as text/plain
7016         if ($prevent_xss &&
7017             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7018              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7019                 my $rest = $1;
7020                 $rest = defined $rest ? $rest : '';
7021                 $type = "text/plain$rest";
7022         }
7023
7024         print $cgi->header(
7025                 -type => $type,
7026                 -expires => $expires,
7027                 -content_disposition =>
7028                         ($sandbox ? 'attachment' : 'inline')
7029                         . '; filename="' . $save_as . '"');
7030         local $/ = undef;
7031         binmode STDOUT, ':raw';
7032         print <$fd>;
7033         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7034         close $fd;
7035 }
7036
7037 sub git_blob {
7038         my $expires;
7039
7040         if (!defined $hash) {
7041                 if (defined $file_name) {
7042                         my $base = $hash_base || git_get_head_hash($project);
7043                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7044                                 or die_error(404, "Cannot find file");
7045                 } else {
7046                         die_error(400, "No file name defined");
7047                 }
7048         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7049                 # blobs defined by non-textual hash id's can be cached
7050                 $expires = "+1d";
7051         }
7052
7053         my $have_blame = gitweb_check_feature('blame');
7054         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7055                 or die_error(500, "Couldn't cat $file_name, $hash");
7056         my $mimetype = blob_mimetype($fd, $file_name);
7057         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7058         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7059                 close $fd;
7060                 return git_blob_plain($mimetype);
7061         }
7062         # we can have blame only for text/* mimetype
7063         $have_blame &&= ($mimetype =~ m!^text/!);
7064
7065         my $highlight = gitweb_check_feature('highlight');
7066         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
7067         $fd = run_highlighter($fd, $highlight, $syntax)
7068                 if $syntax;
7069
7070         git_header_html(undef, $expires);
7071         my $formats_nav = '';
7072         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7073                 if (defined $file_name) {
7074                         if ($have_blame) {
7075                                 $formats_nav .=
7076                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7077                                                 "blame") .
7078                                         " | ";
7079                         }
7080                         $formats_nav .=
7081                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7082                                         "history") .
7083                                 " | " .
7084                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7085                                         "raw") .
7086                                 " | " .
7087                                 $cgi->a({-href => href(action=>"blob",
7088                                                        hash_base=>"HEAD", file_name=>$file_name)},
7089                                         "HEAD");
7090                 } else {
7091                         $formats_nav .=
7092                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7093                                         "raw");
7094                 }
7095                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7096                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7097         } else {
7098                 print "<div class=\"page_nav\">\n" .
7099                       "<br/><br/></div>\n" .
7100                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7101         }
7102         git_print_page_path($file_name, "blob", $hash_base);
7103         print "<div class=\"page_body\">\n";
7104         if ($mimetype =~ m!^image/!) {
7105                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7106                 if ($file_name) {
7107                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7108                 }
7109                 print qq! src="! .
7110                       href(action=>"blob_plain", hash=>$hash,
7111                            hash_base=>$hash_base, file_name=>$file_name) .
7112                       qq!" />\n!;
7113         } else {
7114                 my $nr;
7115                 while (my $line = <$fd>) {
7116                         chomp $line;
7117                         $nr++;
7118                         $line = untabify($line);
7119                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7120                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7121                                $syntax ? sanitize($line) : esc_html($line, -nbsp=>1);
7122                 }
7123         }
7124         close $fd
7125                 or print "Reading blob failed.\n";
7126         print "</div>";
7127         git_footer_html();
7128 }
7129
7130 sub git_tree {
7131         if (!defined $hash_base) {
7132                 $hash_base = "HEAD";
7133         }
7134         if (!defined $hash) {
7135                 if (defined $file_name) {
7136                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7137                 } else {
7138                         $hash = $hash_base;
7139                 }
7140         }
7141         die_error(404, "No such tree") unless defined($hash);
7142
7143         my $show_sizes = gitweb_check_feature('show-sizes');
7144         my $have_blame = gitweb_check_feature('blame');
7145
7146         my @entries = ();
7147         {
7148                 local $/ = "\0";
7149                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7150                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7151                         or die_error(500, "Open git-ls-tree failed");
7152                 @entries = map { chomp; $_ } <$fd>;
7153                 close $fd
7154                         or die_error(404, "Reading tree failed");
7155         }
7156
7157         my $refs = git_get_references();
7158         my $ref = format_ref_marker($refs, $hash_base);
7159         git_header_html();
7160         my $basedir = '';
7161         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7162                 my @views_nav = ();
7163                 if (defined $file_name) {
7164                         push @views_nav,
7165                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7166                                         "history"),
7167                                 $cgi->a({-href => href(action=>"tree",
7168                                                        hash_base=>"HEAD", file_name=>$file_name)},
7169                                         "HEAD"),
7170                 }
7171                 my $snapshot_links = format_snapshot_links($hash);
7172                 if (defined $snapshot_links) {
7173                         # FIXME: Should be available when we have no hash base as well.
7174                         push @views_nav, $snapshot_links;
7175                 }
7176                 git_print_page_nav('tree','', $hash_base, undef, undef,
7177                                    join(' | ', @views_nav));
7178                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7179         } else {
7180                 undef $hash_base;
7181                 print "<div class=\"page_nav\">\n";
7182                 print "<br/><br/></div>\n";
7183                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7184         }
7185         if (defined $file_name) {
7186                 $basedir = $file_name;
7187                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7188                         $basedir .= '/';
7189                 }
7190                 git_print_page_path($file_name, 'tree', $hash_base);
7191         }
7192         print "<div class=\"page_body\">\n";
7193         print "<table class=\"tree\">\n";
7194         my $alternate = 1;
7195         # '..' (top directory) link if possible
7196         if (defined $hash_base &&
7197             defined $file_name && $file_name =~ m![^/]+$!) {
7198                 if ($alternate) {
7199                         print "<tr class=\"dark\">\n";
7200                 } else {
7201                         print "<tr class=\"light\">\n";
7202                 }
7203                 $alternate ^= 1;
7204
7205                 my $up = $file_name;
7206                 $up =~ s!/?[^/]+$!!;
7207                 undef $up unless $up;
7208                 # based on git_print_tree_entry
7209                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7210                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7211                 print '<td class="list">';
7212                 print $cgi->a({-href => href(action=>"tree",
7213                                              hash_base=>$hash_base,
7214                                              file_name=>$up)},
7215                               "..");
7216                 print "</td>\n";
7217                 print "<td class=\"link\"></td>\n";
7218
7219                 print "</tr>\n";
7220         }
7221         foreach my $line (@entries) {
7222                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7223
7224                 if ($alternate) {
7225                         print "<tr class=\"dark\">\n";
7226                 } else {
7227                         print "<tr class=\"light\">\n";
7228                 }
7229                 $alternate ^= 1;
7230
7231                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7232
7233                 print "</tr>\n";
7234         }
7235         print "</table>\n" .
7236               "</div>";
7237         git_footer_html();
7238 }
7239
7240 sub sanitize_for_filename {
7241     my $name = shift;
7242
7243     $name =~ s!/!-!g;
7244     $name =~ s/[^[:alnum:]_.-]//g;
7245
7246     return $name;
7247 }
7248
7249 sub snapshot_name {
7250         my ($project, $hash) = @_;
7251
7252         # path/to/project.git  -> project
7253         # path/to/project/.git -> project
7254         my $name = to_utf8($project);
7255         $name =~ s,([^/])/*\.git$,$1,;
7256         $name = sanitize_for_filename(basename($name));
7257
7258         my $ver = $hash;
7259         if ($hash =~ /^[0-9a-fA-F]+$/) {
7260                 # shorten SHA-1 hash
7261                 my $full_hash = git_get_full_hash($project, $hash);
7262                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7263                         $ver = git_get_short_hash($project, $hash);
7264                 }
7265         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7266                 # tags don't need shortened SHA-1 hash
7267                 $ver = $1;
7268         } else {
7269                 # branches and other need shortened SHA-1 hash
7270                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7271                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7272                         my $ref_dir = (defined $1) ? $1 : '';
7273                         $ver = $2;
7274
7275                         $ref_dir = sanitize_for_filename($ref_dir);
7276                         # for refs neither in heads nor remotes we want to
7277                         # add a ref dir to archive name
7278                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7279                                 $ver = $ref_dir . '-' . $ver;
7280                         }
7281                 }
7282                 $ver .= '-' . git_get_short_hash($project, $hash);
7283         }
7284         # special case of sanitization for filename - we change
7285         # slashes to dots instead of dashes
7286         # in case of hierarchical branch names
7287         $ver =~ s!/!.!g;
7288         $ver =~ s/[^[:alnum:]_.-]//g;
7289
7290         # name = project-version_string
7291         $name = "$name-$ver";
7292
7293         return wantarray ? ($name, $name) : $name;
7294 }
7295
7296 sub exit_if_unmodified_since {
7297         my ($latest_epoch) = @_;
7298         our $cgi;
7299
7300         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7301         if (defined $if_modified) {
7302                 my $since;
7303                 if (eval { require HTTP::Date; 1; }) {
7304                         $since = HTTP::Date::str2time($if_modified);
7305                 } elsif (eval { require Time::ParseDate; 1; }) {
7306                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7307                 }
7308                 if (defined $since && $latest_epoch <= $since) {
7309                         my %latest_date = parse_date($latest_epoch);
7310                         print $cgi->header(
7311                                 -last_modified => $latest_date{'rfc2822'},
7312                                 -status => '304 Not Modified');
7313                         goto DONE_GITWEB;
7314                 }
7315         }
7316 }
7317
7318 sub git_snapshot {
7319         my $format = $input_params{'snapshot_format'};
7320         if (!@snapshot_fmts) {
7321                 die_error(403, "Snapshots not allowed");
7322         }
7323         # default to first supported snapshot format
7324         $format ||= $snapshot_fmts[0];
7325         if ($format !~ m/^[a-z0-9]+$/) {
7326                 die_error(400, "Invalid snapshot format parameter");
7327         } elsif (!exists($known_snapshot_formats{$format})) {
7328                 die_error(400, "Unknown snapshot format");
7329         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7330                 die_error(403, "Snapshot format not allowed");
7331         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7332                 die_error(403, "Unsupported snapshot format");
7333         }
7334
7335         my $type = git_get_type("$hash^{}");
7336         if (!$type) {
7337                 die_error(404, 'Object does not exist');
7338         }  elsif ($type eq 'blob') {
7339                 die_error(400, 'Object is not a tree-ish');
7340         }
7341
7342         my ($name, $prefix) = snapshot_name($project, $hash);
7343         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7344
7345         my %co = parse_commit($hash);
7346         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7347
7348         my $cmd = quote_command(
7349                 git_cmd(), 'archive',
7350                 "--format=$known_snapshot_formats{$format}{'format'}",
7351                 "--prefix=$prefix/", $hash);
7352         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7353                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7354         }
7355
7356         $filename =~ s/(["\\])/\\$1/g;
7357         my %latest_date;
7358         if (%co) {
7359                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7360         }
7361
7362         print $cgi->header(
7363                 -type => $known_snapshot_formats{$format}{'type'},
7364                 -content_disposition => 'inline; filename="' . $filename . '"',
7365                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7366                 -status => '200 OK');
7367
7368         open my $fd, "-|", $cmd
7369                 or die_error(500, "Execute git-archive failed");
7370         binmode STDOUT, ':raw';
7371         print <$fd>;
7372         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7373         close $fd;
7374 }
7375
7376 sub git_log_generic {
7377         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7378
7379         my $head = git_get_head_hash($project);
7380         if (!defined $base) {
7381                 $base = $head;
7382         }
7383         if (!defined $page) {
7384                 $page = 0;
7385         }
7386         my $refs = git_get_references();
7387
7388         my $commit_hash = $base;
7389         if (defined $parent) {
7390                 $commit_hash = "$parent..$base";
7391         }
7392         my @commitlist =
7393                 parse_commits($commit_hash, 101, (100 * $page),
7394                               defined $file_name ? ($file_name, "--full-history") : ());
7395
7396         my $ftype;
7397         if (!defined $file_hash && defined $file_name) {
7398                 # some commits could have deleted file in question,
7399                 # and not have it in tree, but one of them has to have it
7400                 for (my $i = 0; $i < @commitlist; $i++) {
7401                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7402                         last if defined $file_hash;
7403                 }
7404         }
7405         if (defined $file_hash) {
7406                 $ftype = git_get_type($file_hash);
7407         }
7408         if (defined $file_name && !defined $ftype) {
7409                 die_error(500, "Unknown type of object");
7410         }
7411         my %co;
7412         if (defined $file_name) {
7413                 %co = parse_commit($base)
7414                         or die_error(404, "Unknown commit object");
7415         }
7416
7417
7418         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7419         my $next_link = '';
7420         if ($#commitlist >= 100) {
7421                 $next_link =
7422                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7423                                  -accesskey => "n", -title => "Alt-n"}, "next");
7424         }
7425         my $patch_max = gitweb_get_feature('patches');
7426         if ($patch_max && !defined $file_name) {
7427                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7428                         $paging_nav .= " &sdot; " .
7429                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7430                                         "patches");
7431                 }
7432         }
7433
7434         git_header_html();
7435         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7436         if (defined $file_name) {
7437                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7438         } else {
7439                 git_print_header_div('summary', $project)
7440         }
7441         git_print_page_path($file_name, $ftype, $hash_base)
7442                 if (defined $file_name);
7443
7444         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7445                      $file_name, $file_hash, $ftype);
7446
7447         git_footer_html();
7448 }
7449
7450 sub git_log {
7451         git_log_generic('log', \&git_log_body,
7452                         $hash, $hash_parent);
7453 }
7454
7455 sub git_commit {
7456         $hash ||= $hash_base || "HEAD";
7457         my %co = parse_commit($hash)
7458             or die_error(404, "Unknown commit object");
7459
7460         my $parent  = $co{'parent'};
7461         my $parents = $co{'parents'}; # listref
7462
7463         # we need to prepare $formats_nav before any parameter munging
7464         my $formats_nav;
7465         if (!defined $parent) {
7466                 # --root commitdiff
7467                 $formats_nav .= '(initial)';
7468         } elsif (@$parents == 1) {
7469                 # single parent commit
7470                 $formats_nav .=
7471                         '(parent: ' .
7472                         $cgi->a({-href => href(action=>"commit",
7473                                                hash=>$parent)},
7474                                 esc_html(substr($parent, 0, 7))) .
7475                         ')';
7476         } else {
7477                 # merge commit
7478                 $formats_nav .=
7479                         '(merge: ' .
7480                         join(' ', map {
7481                                 $cgi->a({-href => href(action=>"commit",
7482                                                        hash=>$_)},
7483                                         esc_html(substr($_, 0, 7)));
7484                         } @$parents ) .
7485                         ')';
7486         }
7487         if (gitweb_check_feature('patches') && @$parents <= 1) {
7488                 $formats_nav .= " | " .
7489                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7490                                 "patch");
7491         }
7492
7493         if (!defined $parent) {
7494                 $parent = "--root";
7495         }
7496         my @difftree;
7497         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7498                 @diff_opts,
7499                 (@$parents <= 1 ? $parent : '-c'),
7500                 $hash, "--"
7501                 or die_error(500, "Open git-diff-tree failed");
7502         @difftree = map { chomp; $_ } <$fd>;
7503         close $fd or die_error(404, "Reading git-diff-tree failed");
7504
7505         # non-textual hash id's can be cached
7506         my $expires;
7507         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7508                 $expires = "+1d";
7509         }
7510         my $refs = git_get_references();
7511         my $ref = format_ref_marker($refs, $co{'id'});
7512
7513         git_header_html(undef, $expires);
7514         git_print_page_nav('commit', '',
7515                            $hash, $co{'tree'}, $hash,
7516                            $formats_nav);
7517
7518         if (defined $co{'parent'}) {
7519                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7520         } else {
7521                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7522         }
7523         print "<div class=\"title_text\">\n" .
7524               "<table class=\"object_header\">\n";
7525         git_print_authorship_rows(\%co);
7526         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7527         print "<tr>" .
7528               "<td>tree</td>" .
7529               "<td class=\"sha1\">" .
7530               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7531                        class => "list"}, $co{'tree'}) .
7532               "</td>" .
7533               "<td class=\"link\">" .
7534               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7535                       "tree");
7536         my $snapshot_links = format_snapshot_links($hash);
7537         if (defined $snapshot_links) {
7538                 print " | " . $snapshot_links;
7539         }
7540         print "</td>" .
7541               "</tr>\n";
7542
7543         foreach my $par (@$parents) {
7544                 print "<tr>" .
7545                       "<td>parent</td>" .
7546                       "<td class=\"sha1\">" .
7547                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7548                                class => "list"}, $par) .
7549                       "</td>" .
7550                       "<td class=\"link\">" .
7551                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7552                       " | " .
7553                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7554                       "</td>" .
7555                       "</tr>\n";
7556         }
7557         print "</table>".
7558               "</div>\n";
7559
7560         print "<div class=\"page_body\">\n";
7561         git_print_log($co{'comment'});
7562         print "</div>\n";
7563
7564         git_difftree_body(\@difftree, $hash, @$parents);
7565
7566         git_footer_html();
7567 }
7568
7569 sub git_object {
7570         # object is defined by:
7571         # - hash or hash_base alone
7572         # - hash_base and file_name
7573         my $type;
7574
7575         # - hash or hash_base alone
7576         if ($hash || ($hash_base && !defined $file_name)) {
7577                 my $object_id = $hash || $hash_base;
7578
7579                 open my $fd, "-|", quote_command(
7580                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7581                         or die_error(404, "Object does not exist");
7582                 $type = <$fd>;
7583                 defined $type && chomp $type;
7584                 close $fd
7585                         or die_error(404, "Object does not exist");
7586
7587         # - hash_base and file_name
7588         } elsif ($hash_base && defined $file_name) {
7589                 $file_name =~ s,/+$,,;
7590
7591                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7592                         or die_error(404, "Base object does not exist");
7593
7594                 # here errors should not happen
7595                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7596                         or die_error(500, "Open git-ls-tree failed");
7597                 my $line = <$fd>;
7598                 close $fd;
7599
7600                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7601                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7602                         die_error(404, "File or directory for given base does not exist");
7603                 }
7604                 $type = $2;
7605                 $hash = $3;
7606         } else {
7607                 die_error(400, "Not enough information to find object");
7608         }
7609
7610         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7611                                           hash=>$hash, hash_base=>$hash_base,
7612                                           file_name=>$file_name),
7613                              -status => '302 Found');
7614 }
7615
7616 sub git_blobdiff {
7617         my $format = shift || 'html';
7618         my $diff_style = $input_params{'diff_style'} || 'inline';
7619
7620         my $fd;
7621         my @difftree;
7622         my %diffinfo;
7623         my $expires;
7624
7625         # preparing $fd and %diffinfo for git_patchset_body
7626         # new style URI
7627         if (defined $hash_base && defined $hash_parent_base) {
7628                 if (defined $file_name) {
7629                         # read raw output
7630                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7631                                 $hash_parent_base, $hash_base,
7632                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7633                                 or die_error(500, "Open git-diff-tree failed");
7634                         @difftree = map { chomp; $_ } <$fd>;
7635                         close $fd
7636                                 or die_error(404, "Reading git-diff-tree failed");
7637                         @difftree
7638                                 or die_error(404, "Blob diff not found");
7639
7640                 } elsif (defined $hash &&
7641                          $hash =~ /[0-9a-fA-F]{40}/) {
7642                         # try to find filename from $hash
7643
7644                         # read filtered raw output
7645                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7646                                 $hash_parent_base, $hash_base, "--"
7647                                 or die_error(500, "Open git-diff-tree failed");
7648                         @difftree =
7649                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7650                                 # $hash == to_id
7651                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7652                                 map { chomp; $_ } <$fd>;
7653                         close $fd
7654                                 or die_error(404, "Reading git-diff-tree failed");
7655                         @difftree
7656                                 or die_error(404, "Blob diff not found");
7657
7658                 } else {
7659                         die_error(400, "Missing one of the blob diff parameters");
7660                 }
7661
7662                 if (@difftree > 1) {
7663                         die_error(400, "Ambiguous blob diff specification");
7664                 }
7665
7666                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7667                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7668                 $file_name   ||= $diffinfo{'to_file'};
7669
7670                 $hash_parent ||= $diffinfo{'from_id'};
7671                 $hash        ||= $diffinfo{'to_id'};
7672
7673                 # non-textual hash id's can be cached
7674                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7675                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7676                         $expires = '+1d';
7677                 }
7678
7679                 # open patch output
7680                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7681                         '-p', ($format eq 'html' ? "--full-index" : ()),
7682                         $hash_parent_base, $hash_base,
7683                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7684                         or die_error(500, "Open git-diff-tree failed");
7685         }
7686
7687         # old/legacy style URI -- not generated anymore since 1.4.3.
7688         if (!%diffinfo) {
7689                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7690         }
7691
7692         # header
7693         if ($format eq 'html') {
7694                 my $formats_nav =
7695                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7696                                 "raw");
7697                 $formats_nav .= diff_style_nav($diff_style);
7698                 git_header_html(undef, $expires);
7699                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7700                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7701                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7702                 } else {
7703                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7704                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7705                 }
7706                 if (defined $file_name) {
7707                         git_print_page_path($file_name, "blob", $hash_base);
7708                 } else {
7709                         print "<div class=\"page_path\"></div>\n";
7710                 }
7711
7712         } elsif ($format eq 'plain') {
7713                 print $cgi->header(
7714                         -type => 'text/plain',
7715                         -charset => 'utf-8',
7716                         -expires => $expires,
7717                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7718
7719                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7720
7721         } else {
7722                 die_error(400, "Unknown blobdiff format");
7723         }
7724
7725         # patch
7726         if ($format eq 'html') {
7727                 print "<div class=\"page_body\">\n";
7728
7729                 git_patchset_body($fd, $diff_style,
7730                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7731                 close $fd;
7732
7733                 print "</div>\n"; # class="page_body"
7734                 git_footer_html();
7735
7736         } else {
7737                 while (my $line = <$fd>) {
7738                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7739                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7740
7741                         print $line;
7742
7743                         last if $line =~ m!^\+\+\+!;
7744                 }
7745                 local $/ = undef;
7746                 print <$fd>;
7747                 close $fd;
7748         }
7749 }
7750
7751 sub git_blobdiff_plain {
7752         git_blobdiff('plain');
7753 }
7754
7755 # assumes that it is added as later part of already existing navigation,
7756 # so it returns "| foo | bar" rather than just "foo | bar"
7757 sub diff_style_nav {
7758         my ($diff_style, $is_combined) = @_;
7759         $diff_style ||= 'inline';
7760
7761         return "" if ($is_combined);
7762
7763         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7764         my %styles = @styles;
7765         @styles =
7766                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7767
7768         return join '',
7769                 map { " | ".$_ }
7770                 map {
7771                         $_ eq $diff_style ? $styles{$_} :
7772                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7773                 } @styles;
7774 }
7775
7776 sub git_commitdiff {
7777         my %params = @_;
7778         my $format = $params{-format} || 'html';
7779         my $diff_style = $input_params{'diff_style'} || 'inline';
7780
7781         my ($patch_max) = gitweb_get_feature('patches');
7782         if ($format eq 'patch') {
7783                 die_error(403, "Patch view not allowed") unless $patch_max;
7784         }
7785
7786         $hash ||= $hash_base || "HEAD";
7787         my %co = parse_commit($hash)
7788             or die_error(404, "Unknown commit object");
7789
7790         # choose format for commitdiff for merge
7791         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7792                 $hash_parent = '--cc';
7793         }
7794         # we need to prepare $formats_nav before almost any parameter munging
7795         my $formats_nav;
7796         if ($format eq 'html') {
7797                 $formats_nav =
7798                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7799                                 "raw");
7800                 if ($patch_max && @{$co{'parents'}} <= 1) {
7801                         $formats_nav .= " | " .
7802                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7803                                         "patch");
7804                 }
7805                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7806
7807                 if (defined $hash_parent &&
7808                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7809                         # commitdiff with two commits given
7810                         my $hash_parent_short = $hash_parent;
7811                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7812                                 $hash_parent_short = substr($hash_parent, 0, 7);
7813                         }
7814                         $formats_nav .=
7815                                 ' (from';
7816                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7817                                 if ($co{'parents'}[$i] eq $hash_parent) {
7818                                         $formats_nav .= ' parent ' . ($i+1);
7819                                         last;
7820                                 }
7821                         }
7822                         $formats_nav .= ': ' .
7823                                 $cgi->a({-href => href(-replay=>1,
7824                                                        hash=>$hash_parent, hash_base=>undef)},
7825                                         esc_html($hash_parent_short)) .
7826                                 ')';
7827                 } elsif (!$co{'parent'}) {
7828                         # --root commitdiff
7829                         $formats_nav .= ' (initial)';
7830                 } elsif (scalar @{$co{'parents'}} == 1) {
7831                         # single parent commit
7832                         $formats_nav .=
7833                                 ' (parent: ' .
7834                                 $cgi->a({-href => href(-replay=>1,
7835                                                        hash=>$co{'parent'}, hash_base=>undef)},
7836                                         esc_html(substr($co{'parent'}, 0, 7))) .
7837                                 ')';
7838                 } else {
7839                         # merge commit
7840                         if ($hash_parent eq '--cc') {
7841                                 $formats_nav .= ' | ' .
7842                                         $cgi->a({-href => href(-replay=>1,
7843                                                                hash=>$hash, hash_parent=>'-c')},
7844                                                 'combined');
7845                         } else { # $hash_parent eq '-c'
7846                                 $formats_nav .= ' | ' .
7847                                         $cgi->a({-href => href(-replay=>1,
7848                                                                hash=>$hash, hash_parent=>'--cc')},
7849                                                 'compact');
7850                         }
7851                         $formats_nav .=
7852                                 ' (merge: ' .
7853                                 join(' ', map {
7854                                         $cgi->a({-href => href(-replay=>1,
7855                                                                hash=>$_, hash_base=>undef)},
7856                                                 esc_html(substr($_, 0, 7)));
7857                                 } @{$co{'parents'}} ) .
7858                                 ')';
7859                 }
7860         }
7861
7862         my $hash_parent_param = $hash_parent;
7863         if (!defined $hash_parent_param) {
7864                 # --cc for multiple parents, --root for parentless
7865                 $hash_parent_param =
7866                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7867         }
7868
7869         # read commitdiff
7870         my $fd;
7871         my @difftree;
7872         if ($format eq 'html') {
7873                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7874                         "--no-commit-id", "--patch-with-raw", "--full-index",
7875                         $hash_parent_param, $hash, "--"
7876                         or die_error(500, "Open git-diff-tree failed");
7877
7878                 while (my $line = <$fd>) {
7879                         chomp $line;
7880                         # empty line ends raw part of diff-tree output
7881                         last unless $line;
7882                         push @difftree, scalar parse_difftree_raw_line($line);
7883                 }
7884
7885         } elsif ($format eq 'plain') {
7886                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7887                         '-p', $hash_parent_param, $hash, "--"
7888                         or die_error(500, "Open git-diff-tree failed");
7889         } elsif ($format eq 'patch') {
7890                 # For commit ranges, we limit the output to the number of
7891                 # patches specified in the 'patches' feature.
7892                 # For single commits, we limit the output to a single patch,
7893                 # diverging from the git-format-patch default.
7894                 my @commit_spec = ();
7895                 if ($hash_parent) {
7896                         if ($patch_max > 0) {
7897                                 push @commit_spec, "-$patch_max";
7898                         }
7899                         push @commit_spec, '-n', "$hash_parent..$hash";
7900                 } else {
7901                         if ($params{-single}) {
7902                                 push @commit_spec, '-1';
7903                         } else {
7904                                 if ($patch_max > 0) {
7905                                         push @commit_spec, "-$patch_max";
7906                                 }
7907                                 push @commit_spec, "-n";
7908                         }
7909                         push @commit_spec, '--root', $hash;
7910                 }
7911                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7912                         '--encoding=utf8', '--stdout', @commit_spec
7913                         or die_error(500, "Open git-format-patch failed");
7914         } else {
7915                 die_error(400, "Unknown commitdiff format");
7916         }
7917
7918         # non-textual hash id's can be cached
7919         my $expires;
7920         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7921                 $expires = "+1d";
7922         }
7923
7924         # write commit message
7925         if ($format eq 'html') {
7926                 my $refs = git_get_references();
7927                 my $ref = format_ref_marker($refs, $co{'id'});
7928
7929                 git_header_html(undef, $expires);
7930                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7931                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7932                 print "<div class=\"title_text\">\n" .
7933                       "<table class=\"object_header\">\n";
7934                 git_print_authorship_rows(\%co);
7935                 print "</table>".
7936                       "</div>\n";
7937                 print "<div class=\"page_body\">\n";
7938                 if (@{$co{'comment'}} > 1) {
7939                         print "<div class=\"log\">\n";
7940                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7941                         print "</div>\n"; # class="log"
7942                 }
7943
7944         } elsif ($format eq 'plain') {
7945                 my $refs = git_get_references("tags");
7946                 my $tagname = git_get_rev_name_tags($hash);
7947                 my $filename = basename($project) . "-$hash.patch";
7948
7949                 print $cgi->header(
7950                         -type => 'text/plain',
7951                         -charset => 'utf-8',
7952                         -expires => $expires,
7953                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7954                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7955                 print "From: " . to_utf8($co{'author'}) . "\n";
7956                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7957                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7958
7959                 print "X-Git-Tag: $tagname\n" if $tagname;
7960                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7961
7962                 foreach my $line (@{$co{'comment'}}) {
7963                         print to_utf8($line) . "\n";
7964                 }
7965                 print "---\n\n";
7966         } elsif ($format eq 'patch') {
7967                 my $filename = basename($project) . "-$hash.patch";
7968
7969                 print $cgi->header(
7970                         -type => 'text/plain',
7971                         -charset => 'utf-8',
7972                         -expires => $expires,
7973                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7974         }
7975
7976         # write patch
7977         if ($format eq 'html') {
7978                 my $use_parents = !defined $hash_parent ||
7979                         $hash_parent eq '-c' || $hash_parent eq '--cc';
7980                 git_difftree_body(\@difftree, $hash,
7981                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7982                 print "<br/>\n";
7983
7984                 git_patchset_body($fd, $diff_style,
7985                                   \@difftree, $hash,
7986                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
7987                 close $fd;
7988                 print "</div>\n"; # class="page_body"
7989                 git_footer_html();
7990
7991         } elsif ($format eq 'plain') {
7992                 local $/ = undef;
7993                 print <$fd>;
7994                 close $fd
7995                         or print "Reading git-diff-tree failed\n";
7996         } elsif ($format eq 'patch') {
7997                 local $/ = undef;
7998                 print <$fd>;
7999                 close $fd
8000                         or print "Reading git-format-patch failed\n";
8001         }
8002 }
8003
8004 sub git_commitdiff_plain {
8005         git_commitdiff(-format => 'plain');
8006 }
8007
8008 # format-patch-style patches
8009 sub git_patch {
8010         git_commitdiff(-format => 'patch', -single => 1);
8011 }
8012
8013 sub git_patches {
8014         git_commitdiff(-format => 'patch');
8015 }
8016
8017 sub git_history {
8018         git_log_generic('history', \&git_history_body,
8019                         $hash_base, $hash_parent_base,
8020                         $file_name, $hash);
8021 }
8022
8023 sub git_search {
8024         $searchtype ||= 'commit';
8025
8026         # check if appropriate features are enabled
8027         gitweb_check_feature('search')
8028                 or die_error(403, "Search is disabled");
8029         if ($searchtype eq 'pickaxe') {
8030                 # pickaxe may take all resources of your box and run for several minutes
8031                 # with every query - so decide by yourself how public you make this feature
8032                 gitweb_check_feature('pickaxe')
8033                         or die_error(403, "Pickaxe search is disabled");
8034         }
8035         if ($searchtype eq 'grep') {
8036                 # grep search might be potentially CPU-intensive, too
8037                 gitweb_check_feature('grep')
8038                         or die_error(403, "Grep search is disabled");
8039         }
8040
8041         if (!defined $searchtext) {
8042                 die_error(400, "Text field is empty");
8043         }
8044         if (!defined $hash) {
8045                 $hash = git_get_head_hash($project);
8046         }
8047         my %co = parse_commit($hash);
8048         if (!%co) {
8049                 die_error(404, "Unknown commit object");
8050         }
8051         if (!defined $page) {
8052                 $page = 0;
8053         }
8054
8055         if ($searchtype eq 'commit' ||
8056             $searchtype eq 'author' ||
8057             $searchtype eq 'committer') {
8058                 git_search_message(%co);
8059         } elsif ($searchtype eq 'pickaxe') {
8060                 git_search_changes(%co);
8061         } elsif ($searchtype eq 'grep') {
8062                 git_search_files(%co);
8063         } else {
8064                 die_error(400, "Unknown search type");
8065         }
8066 }
8067
8068 sub git_search_help {
8069         git_header_html();
8070         git_print_page_nav('','', $hash,$hash,$hash);
8071         print <<EOT;
8072 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8073 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8074 the pattern entered is recognized as the POSIX extended
8075 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8076 insensitive).</p>
8077 <dl>
8078 <dt><b>commit</b></dt>
8079 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8080 EOT
8081         my $have_grep = gitweb_check_feature('grep');
8082         if ($have_grep) {
8083                 print <<EOT;
8084 <dt><b>grep</b></dt>
8085 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8086     a different one) are searched for the given pattern. On large trees, this search can take
8087 a while and put some strain on the server, so please use it with some consideration. Note that
8088 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8089 case-sensitive.</dd>
8090 EOT
8091         }
8092         print <<EOT;
8093 <dt><b>author</b></dt>
8094 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8095 <dt><b>committer</b></dt>
8096 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8097 EOT
8098         my $have_pickaxe = gitweb_check_feature('pickaxe');
8099         if ($have_pickaxe) {
8100                 print <<EOT;
8101 <dt><b>pickaxe</b></dt>
8102 <dd>All commits that caused the string to appear or disappear from any file (changes that
8103 added, removed or "modified" the string) will be listed. This search can take a while and
8104 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8105 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8106 EOT
8107         }
8108         print "</dl>\n";
8109         git_footer_html();
8110 }
8111
8112 sub git_shortlog {
8113         git_log_generic('shortlog', \&git_shortlog_body,
8114                         $hash, $hash_parent);
8115 }
8116
8117 ## ......................................................................
8118 ## feeds (RSS, Atom; OPML)
8119
8120 sub git_feed {
8121         my $format = shift || 'atom';
8122         my $have_blame = gitweb_check_feature('blame');
8123
8124         # Atom: http://www.atomenabled.org/developers/syndication/
8125         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8126         if ($format ne 'rss' && $format ne 'atom') {
8127                 die_error(400, "Unknown web feed format");
8128         }
8129
8130         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8131         my $head = $hash || 'HEAD';
8132         my @commitlist = parse_commits($head, 150, 0, $file_name);
8133
8134         my %latest_commit;
8135         my %latest_date;
8136         my $content_type = "application/$format+xml";
8137         if (defined $cgi->http('HTTP_ACCEPT') &&
8138                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8139                 # browser (feed reader) prefers text/xml
8140                 $content_type = 'text/xml';
8141         }
8142         if (defined($commitlist[0])) {
8143                 %latest_commit = %{$commitlist[0]};
8144                 my $latest_epoch = $latest_commit{'committer_epoch'};
8145                 exit_if_unmodified_since($latest_epoch);
8146                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8147         }
8148         print $cgi->header(
8149                 -type => $content_type,
8150                 -charset => 'utf-8',
8151                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8152                 -status => '200 OK');
8153
8154         # Optimization: skip generating the body if client asks only
8155         # for Last-Modified date.
8156         return if ($cgi->request_method() eq 'HEAD');
8157
8158         # header variables
8159         my $title = "$site_name - $project/$action";
8160         my $feed_type = 'log';
8161         if (defined $hash) {
8162                 $title .= " - '$hash'";
8163                 $feed_type = 'branch log';
8164                 if (defined $file_name) {
8165                         $title .= " :: $file_name";
8166                         $feed_type = 'history';
8167                 }
8168         } elsif (defined $file_name) {
8169                 $title .= " - $file_name";
8170                 $feed_type = 'history';
8171         }
8172         $title .= " $feed_type";
8173         $title = esc_html($title);
8174         my $descr = git_get_project_description($project);
8175         if (defined $descr) {
8176                 $descr = esc_html($descr);
8177         } else {
8178                 $descr = "$project " .
8179                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8180                          " feed";
8181         }
8182         my $owner = git_get_project_owner($project);
8183         $owner = esc_html($owner);
8184
8185         #header
8186         my $alt_url;
8187         if (defined $file_name) {
8188                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8189         } elsif (defined $hash) {
8190                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8191         } else {
8192                 $alt_url = href(-full=>1, action=>"summary");
8193         }
8194         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8195         if ($format eq 'rss') {
8196                 print <<XML;
8197 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8198 <channel>
8199 XML
8200                 print "<title>$title</title>\n" .
8201                       "<link>$alt_url</link>\n" .
8202                       "<description>$descr</description>\n" .
8203                       "<language>en</language>\n" .
8204                       # project owner is responsible for 'editorial' content
8205                       "<managingEditor>$owner</managingEditor>\n";
8206                 if (defined $logo || defined $favicon) {
8207                         # prefer the logo to the favicon, since RSS
8208                         # doesn't allow both
8209                         my $img = esc_url($logo || $favicon);
8210                         print "<image>\n" .
8211                               "<url>$img</url>\n" .
8212                               "<title>$title</title>\n" .
8213                               "<link>$alt_url</link>\n" .
8214                               "</image>\n";
8215                 }
8216                 if (%latest_date) {
8217                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8218                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8219                 }
8220                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8221         } elsif ($format eq 'atom') {
8222                 print <<XML;
8223 <feed xmlns="http://www.w3.org/2005/Atom">
8224 XML
8225                 print "<title>$title</title>\n" .
8226                       "<subtitle>$descr</subtitle>\n" .
8227                       '<link rel="alternate" type="text/html" href="' .
8228                       $alt_url . '" />' . "\n" .
8229                       '<link rel="self" type="' . $content_type . '" href="' .
8230                       $cgi->self_url() . '" />' . "\n" .
8231                       "<id>" . href(-full=>1) . "</id>\n" .
8232                       # use project owner for feed author
8233                       "<author><name>$owner</name></author>\n";
8234                 if (defined $favicon) {
8235                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8236                 }
8237                 if (defined $logo) {
8238                         # not twice as wide as tall: 72 x 27 pixels
8239                         print "<logo>" . esc_url($logo) . "</logo>\n";
8240                 }
8241                 if (! %latest_date) {
8242                         # dummy date to keep the feed valid until commits trickle in:
8243                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8244                 } else {
8245                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8246                 }
8247                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8248         }
8249
8250         # contents
8251         for (my $i = 0; $i <= $#commitlist; $i++) {
8252                 my %co = %{$commitlist[$i]};
8253                 my $commit = $co{'id'};
8254                 # we read 150, we always show 30 and the ones more recent than 48 hours
8255                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8256                         last;
8257                 }
8258                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8259
8260                 # get list of changed files
8261                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8262                         $co{'parent'} || "--root",
8263                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8264                         or next;
8265                 my @difftree = map { chomp; $_ } <$fd>;
8266                 close $fd
8267                         or next;
8268
8269                 # print element (entry, item)
8270                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8271                 if ($format eq 'rss') {
8272                         print "<item>\n" .
8273                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8274                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8275                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8276                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8277                               "<link>$co_url</link>\n" .
8278                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8279                               "<content:encoded>" .
8280                               "<![CDATA[\n";
8281                 } elsif ($format eq 'atom') {
8282                         print "<entry>\n" .
8283                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8284                               "<updated>$cd{'iso-8601'}</updated>\n" .
8285                               "<author>\n" .
8286                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8287                         if ($co{'author_email'}) {
8288                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8289                         }
8290                         print "</author>\n" .
8291                               # use committer for contributor
8292                               "<contributor>\n" .
8293                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8294                         if ($co{'committer_email'}) {
8295                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8296                         }
8297                         print "</contributor>\n" .
8298                               "<published>$cd{'iso-8601'}</published>\n" .
8299                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8300                               "<id>$co_url</id>\n" .
8301                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8302                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8303                 }
8304                 my $comment = $co{'comment'};
8305                 print "<pre>\n";
8306                 foreach my $line (@$comment) {
8307                         $line = esc_html($line);
8308                         print "$line\n";
8309                 }
8310                 print "</pre><ul>\n";
8311                 foreach my $difftree_line (@difftree) {
8312                         my %difftree = parse_difftree_raw_line($difftree_line);
8313                         next if !$difftree{'from_id'};
8314
8315                         my $file = $difftree{'file'} || $difftree{'to_file'};
8316
8317                         print "<li>" .
8318                               "[" .
8319                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8320                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8321                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8322                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8323                                       -title => "diff"}, 'D');
8324                         if ($have_blame) {
8325                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8326                                                              file_name=>$file, hash_base=>$commit),
8327                                               -title => "blame"}, 'B');
8328                         }
8329                         # if this is not a feed of a file history
8330                         if (!defined $file_name || $file_name ne $file) {
8331                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8332                                                              file_name=>$file, hash=>$commit),
8333                                               -title => "history"}, 'H');
8334                         }
8335                         $file = esc_path($file);
8336                         print "] ".
8337                               "$file</li>\n";
8338                 }
8339                 if ($format eq 'rss') {
8340                         print "</ul>]]>\n" .
8341                               "</content:encoded>\n" .
8342                               "</item>\n";
8343                 } elsif ($format eq 'atom') {
8344                         print "</ul>\n</div>\n" .
8345                               "</content>\n" .
8346                               "</entry>\n";
8347                 }
8348         }
8349
8350         # end of feed
8351         if ($format eq 'rss') {
8352                 print "</channel>\n</rss>\n";
8353         } elsif ($format eq 'atom') {
8354                 print "</feed>\n";
8355         }
8356 }
8357
8358 sub git_rss {
8359         git_feed('rss');
8360 }
8361
8362 sub git_atom {
8363         git_feed('atom');
8364 }
8365
8366 sub git_opml {
8367         my @list = git_get_projects_list($project_filter, $strict_export);
8368         if (!@list) {
8369                 die_error(404, "No projects found");
8370         }
8371
8372         print $cgi->header(
8373                 -type => 'text/xml',
8374                 -charset => 'utf-8',
8375                 -content_disposition => 'inline; filename="opml.xml"');
8376
8377         my $title = esc_html($site_name);
8378         my $filter = " within subdirectory ";
8379         if (defined $project_filter) {
8380                 $filter .= esc_html($project_filter);
8381         } else {
8382                 $filter = "";
8383         }
8384         print <<XML;
8385 <?xml version="1.0" encoding="utf-8"?>
8386 <opml version="1.0">
8387 <head>
8388   <title>$title OPML Export$filter</title>
8389 </head>
8390 <body>
8391 <outline text="git RSS feeds">
8392 XML
8393
8394         foreach my $pr (@list) {
8395                 my %proj = %$pr;
8396                 my $head = git_get_head_hash($proj{'path'});
8397                 if (!defined $head) {
8398                         next;
8399                 }
8400                 $git_dir = "$projectroot/$proj{'path'}";
8401                 my %co = parse_commit($head);
8402                 if (!%co) {
8403                         next;
8404                 }
8405
8406                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8407                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8408                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8409                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8410         }
8411         print <<XML;
8412 </outline>
8413 </body>
8414 </opml>
8415 XML
8416 }