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
  14 use File::Spec;
  15 # __DIR__ is taken from Dir::Self __DIR__ fragment
  16 sub __DIR__ () {
  17         File::Spec->rel2abs(join '', (File::Spec->splitpath(__FILE__))[0, 1]);
  18 }
  19 use lib __DIR__ . '/lib';
  20
  21 use CGI qw(:standard :escapeHTML -nosticky);
  22 use CGI::Util qw(unescape);
  23 use CGI::Carp qw(fatalsToBrowser set_message);
  24 use Encode;
  25 use Fcntl qw(:mode :flock);
  26 use File::Find qw();
  27 use File::Basename qw(basename);
  28 binmode STDOUT, ':utf8';
  29
  30 our $t0;
  31 if (eval { require Time::HiRes; 1; }) {
  32         $t0 = [Time::HiRes::gettimeofday()];
  33 }
  34 our $number_of_git_cmds = 0;
  35
  36 BEGIN {
  37         CGI->compile() if $ENV{'MOD_PERL'};
  38 }
  39
  40 our $version = "++GIT_VERSION++";
  41
  42 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  43 sub evaluate_uri {
  44         our $cgi;
  45
  46         our $my_url = $cgi->url();
  47         our $my_uri = $cgi->url(-absolute => 1);
  48
  49         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  50         # needed and used only for URLs with nonempty PATH_INFO
  51         our $base_url = $my_url;
  52
  53         # When the script is used as DirectoryIndex, the URL does not contain the name
  54         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  55         # have to do it ourselves. We make $path_info global because it's also used
  56         # later on.
  57         #
  58         # Another issue with the script being the DirectoryIndex is that the resulting
  59         # $my_url data is not the full script URL: this is good, because we want
  60         # generated links to keep implying the script name if it wasn't explicitly
  61         # indicated in the URL we're handling, but it means that $my_url cannot be used
  62         # as base URL.
  63         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  64         # to build the base URL ourselves:
  65         our $path_info = $ENV{"PATH_INFO"};
  66         if ($path_info) {
  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 = $cgi->url(-base => 1) . $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 # name of your site or organization to appear in page titles
  94 # replace this with something more descriptive for clearer bookmarks
  95 our $site_name = "++GITWEB_SITENAME++"
  96                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  97
  98 # filename of html text to include at top of each page
  99 our $site_header = "++GITWEB_SITE_HEADER++";
 100 # html text to include at home page
 101 our $home_text = "++GITWEB_HOMETEXT++";
 102 # filename of html text to include at bottom of each page
 103 our $site_footer = "++GITWEB_SITE_FOOTER++";
 104
 105 # URI of stylesheets
 106 our @stylesheets = ("++GITWEB_CSS++");
 107 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 108 our $stylesheet = undef;
 109 # URI of GIT logo (72x27 size)
 110 our $logo = "++GITWEB_LOGO++";
 111 # URI of GIT favicon, assumed to be image/png type
 112 our $favicon = "++GITWEB_FAVICON++";
 113 # URI of gitweb.js (JavaScript code for gitweb)
 114 our $javascript = "++GITWEB_JS++";
 115
 116 # URI and label (title) of GIT logo link
 117 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 118 #our $logo_label = "git documentation";
 119 our $logo_url = "http://git-scm.com/";
 120 our $logo_label = "git homepage";
 121
 122 # source of projects list
 123 our $projects_list = "++GITWEB_LIST++";
 124
 125 # the width (in characters) of the projects list "Description" column
 126 our $projects_list_description_width = 25;
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'cpp' } qw(cxx c++ cc),
 267         map { $_ => 'php' } qw(php3 php4),
 268         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 269         'mak' => 'make',
 270         map { $_ => 'xml' } qw(xhtml html htm),
 271 );
 272
 273
 274 # This enables/disables the caching layer in gitweb.  Currently supported
 275 # is only output (response) caching, similar to the one used on git.kernel.org.
 276 our $caching_enabled = 0;
 277 # Set to _initialized_ instance of cache interface implementing (at least)
 278 # get($key) and set($key, $data) methods (Cache::Cache and CHI interfaces),
 279 # or to name of class of cache interface implementing said methods.
 280 # If unset, GitwebCache::FileCacheWithLocking would be used, which is 'dumb'
 281 # (but fast) file based caching layer, currently without any support for
 282 # cache size limiting.  It is therefore recommended that the cache directory
 283 # be periodically completely deleted; this operation is safe to perform.
 284 # Suggested mechanism:
 285 # mv $cachedir $cachedir.flush && mkdir $cachedir && rm -rf $cachedir.flush
 286 our $cache;
 287 # You define site-wide cache options defaults here; override them with
 288 # $GITWEB_CONFIG as necessary.
 289 our %cache_options = (
 290         # The location in the filesystem that will hold the root of the cache.
 291         # This directory will be created as needed (if possible) on the first
 292         # cache set.  Note that either this directory must exists and web server
 293         # has to have write permissions to it, or web server must be able to
 294         # create this directory.
 295         # Possible values:
 296         # * 'cache' (relative to gitweb),
 297         # * File::Spec->catdir(File::Spec->tmpdir(), 'gitweb-cache'),
 298         # * '/var/cache/gitweb' (FHS compliant, requires being set up),
 299         'cache_root' => 'cache',
 300
 301         # The number of subdirectories deep to cache object item.  This should be
 302         # large enough that no cache directory has more than a few hundred
 303         # objects.  Each non-leaf directory contains up to 256 subdirectories
 304         # (00-ff).  Must be larger than 0.
 305         'cache_depth' => 1,
 306
 307         # The (global) minimum expiration time for objects placed in the cache,
 308         # in seconds.  If the dynamic adaptive cache exporation time is lower
 309         # than this number, we set cache timeout to this minimum.
 310         'expires_min' => 20,   # 20 seconds
 311
 312         # The (global) maximum expiration time for dynamic (adaptive) caching
 313         # algorithm, in seconds.  If the adaptive cache lifetime exceeds this
 314         # number, we set cache timeout to this maximum.
 315         # (If 'expires_min' >= 'expires_max', there is no adaptive cache timeout,
 316         # and 'expires_min' is used as expiration time for objects in cache.)
 317         'expires_max' => 1200, # 20 minutes
 318
 319         # Cache lifetime will be increased by applying this factor to the result
 320         # from 'check_load' callback (see below).
 321         'expires_factor' => 60, # expire time in seconds for 1.0 (100% CPU) load
 322
 323         # User supplied callback for deciding the cache policy, usually system
 324         # load.  Multiplied by 'expires_factor' gives adaptive expiration time,
 325         # in seconds, subject to the limits imposed by 'expires_min' and
 326         # 'expires_max' bounds.  Set to undef (or delete) to turn off dynamic
 327         # lifetime control.
 328         # (Compatibile with Cache::Adaptive.)
 329         'check_load' => \&get_loadavg,
 330
 331         # Maximum cache file life, in seconds.  If cache entry lifetime exceeds
 332         # this value, it wouldn't be served as being too stale when waiting for
 333         # cache to be regenerated/refreshed, instead of trying to display
 334         # existing cache date.
 335         # Set it to -1 to always serve existing data if it exists,
 336         # set it to 0 to turn off serving stale data - always wait.
 337         'max_lifetime' => 5*60*60, # 5 hours
 338
 339         # This enables/disables background caching.  If it is set to true value,
 340         # caching engine would return stale data (if it is not older than
 341         # 'max_lifetime' seconds) if it exists, and launch process if regenerating
 342         # (refreshing) cache into the background.  If it is set to false value,
 343         # the process that fills cache must always wait for data to be generated.
 344         # In theory this will make gitweb seem more responsive at the price of
 345         # serving possibly stale data.
 346         'background_cache' => 1,
 347
 348         # Subroutine which would be called when gitweb has to wait for data to
 349         # be generated (it can't serve stale data because there isn't any,
 350         # or if it exists it is older than 'max_lifetime').  The default
 351         # is to use git_generating_data_html(), which creates "Generating..."
 352         # page, which would then redirect or redraw/rewrite the page when
 353         # data is ready.
 354         # Set it to `undef' to disable this feature.
 355         #
 356         # Such subroutine (if invoked from GitwebCache::SimpleFileCache)
 357         # is passed the following parameters: $cache instance, human-readable
 358         # $key to current page, and filehandle $lock_fh to lockfile.
 359         'generating_info' => \&git_generating_data_html,
 360 );
 361 # You define site-wide options for "Generating..." page (if enabled) here
 362 # (which means that $cache_options{'generating_info'} is set to coderef);
 363 # override them with $GITWEB_CONFIG as necessary.
 364 our %generating_options = (
 365         # The time between generating new piece of output to prevent from
 366         # redirection before data is ready, i.e. time between printing each
 367         # dot in activity indicator / progress info, in seconds.
 368         'print_interval' => 2,
 369         # Maximum time "Generating..." page would be present, waiting for data,
 370         # before unconditional redirect, in seconds.
 371         'timeout' => $cache_options{'expires_min'},
 372 );
 373 # Set to _initialized_ instance of GitwebCache::Capture compatibile capturing
 374 # engine, i.e. one implementing ->new() constructor, and ->capture($code)
 375 # method.  If unset (default), the GitwebCache::Capture::Simple would be used.
 376 our $capture;
 377
 378 # You define site-wide feature defaults here; override them with
 379 # $GITWEB_CONFIG as necessary.
 380 our %feature = (
 381         # feature => {
 382         #       'sub' => feature-sub (subroutine),
 383         #       'override' => allow-override (boolean),
 384         #       'default' => [ default options...] (array reference)}
 385         #
 386         # if feature is overridable (it means that allow-override has true value),
 387         # then feature-sub will be called with default options as parameters;
 388         # return value of feature-sub indicates if to enable specified feature
 389         #
 390         # if there is no 'sub' key (no feature-sub), then feature cannot be
 391         # overridden
 392         #
 393         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 394         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 395         # is enabled
 396
 397         # Enable the 'blame' blob view, showing the last commit that modified
 398         # each line in the file. This can be very CPU-intensive.
 399
 400         # To enable system wide have in $GITWEB_CONFIG
 401         # $feature{'blame'}{'default'} = [1];
 402         # To have project specific config enable override in $GITWEB_CONFIG
 403         # $feature{'blame'}{'override'} = 1;
 404         # and in project config gitweb.blame = 0|1;
 405         'blame' => {
 406                 'sub' => sub { feature_bool('blame', @_) },
 407                 'override' => 0,
 408                 'default' => [0]},
 409
 410         # Enable the 'snapshot' link, providing a compressed archive of any
 411         # tree. This can potentially generate high traffic if you have large
 412         # project.
 413
 414         # Value is a list of formats defined in %known_snapshot_formats that
 415         # you wish to offer.
 416         # To disable system wide have in $GITWEB_CONFIG
 417         # $feature{'snapshot'}{'default'} = [];
 418         # To have project specific config enable override in $GITWEB_CONFIG
 419         # $feature{'snapshot'}{'override'} = 1;
 420         # and in project config, a comma-separated list of formats or "none"
 421         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 422         'snapshot' => {
 423                 'sub' => \&feature_snapshot,
 424                 'override' => 0,
 425                 'default' => ['tgz']},
 426
 427         # Enable text search, which will list the commits which match author,
 428         # committer or commit text to a given string.  Enabled by default.
 429         # Project specific override is not supported.
 430         'search' => {
 431                 'override' => 0,
 432                 'default' => [1]},
 433
 434         # Enable grep search, which will list the files in currently selected
 435         # tree containing the given string. Enabled by default. This can be
 436         # potentially CPU-intensive, of course.
 437
 438         # To enable system wide have in $GITWEB_CONFIG
 439         # $feature{'grep'}{'default'} = [1];
 440         # To have project specific config enable override in $GITWEB_CONFIG
 441         # $feature{'grep'}{'override'} = 1;
 442         # and in project config gitweb.grep = 0|1;
 443         'grep' => {
 444                 'sub' => sub { feature_bool('grep', @_) },
 445                 'override' => 0,
 446                 'default' => [1]},
 447
 448         # Enable the pickaxe search, which will list the commits that modified
 449         # a given string in a file. This can be practical and quite faster
 450         # alternative to 'blame', but still potentially CPU-intensive.
 451
 452         # To enable system wide have in $GITWEB_CONFIG
 453         # $feature{'pickaxe'}{'default'} = [1];
 454         # To have project specific config enable override in $GITWEB_CONFIG
 455         # $feature{'pickaxe'}{'override'} = 1;
 456         # and in project config gitweb.pickaxe = 0|1;
 457         'pickaxe' => {
 458                 'sub' => sub { feature_bool('pickaxe', @_) },
 459                 'override' => 0,
 460                 'default' => [1]},
 461
 462         # Enable showing size of blobs in a 'tree' view, in a separate
 463         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 464
 465         # To disable system wide have in $GITWEB_CONFIG
 466         # $feature{'show-sizes'}{'default'} = [0];
 467         # To have project specific config enable override in $GITWEB_CONFIG
 468         # $feature{'show-sizes'}{'override'} = 1;
 469         # and in project config gitweb.showsizes = 0|1;
 470         'show-sizes' => {
 471                 'sub' => sub { feature_bool('showsizes', @_) },
 472                 'override' => 0,
 473                 'default' => [1]},
 474
 475         # Make gitweb use an alternative format of the URLs which can be
 476         # more readable and natural-looking: project name is embedded
 477         # directly in the path and the query string contains other
 478         # auxiliary information. All gitweb installations recognize
 479         # URL in either format; this configures in which formats gitweb
 480         # generates links.
 481
 482         # To enable system wide have in $GITWEB_CONFIG
 483         # $feature{'pathinfo'}{'default'} = [1];
 484         # Project specific override is not supported.
 485
 486         # Note that you will need to change the default location of CSS,
 487         # favicon, logo and possibly other files to an absolute URL. Also,
 488         # if gitweb.cgi serves as your indexfile, you will need to force
 489         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 490         'pathinfo' => {
 491                 'override' => 0,
 492                 'default' => [0]},
 493
 494         # Make gitweb consider projects in project root subdirectories
 495         # to be forks of existing projects. Given project $projname.git,
 496         # projects matching $projname/*.git will not be shown in the main
 497         # projects list, instead a '+' mark will be added to $projname
 498         # there and a 'forks' view will be enabled for the project, listing
 499         # all the forks. If project list is taken from a file, forks have
 500         # to be listed after the main project.
 501
 502         # To enable system wide have in $GITWEB_CONFIG
 503         # $feature{'forks'}{'default'} = [1];
 504         # Project specific override is not supported.
 505         'forks' => {
 506                 'override' => 0,
 507                 'default' => [0]},
 508
 509         # Insert custom links to the action bar of all project pages.
 510         # This enables you mainly to link to third-party scripts integrating
 511         # into gitweb; e.g. git-browser for graphical history representation
 512         # or custom web-based repository administration interface.
 513
 514         # The 'default' value consists of a list of triplets in the form
 515         # (label, link, position) where position is the label after which
 516         # to insert the link and link is a format string where %n expands
 517         # to the project name, %f to the project path within the filesystem,
 518         # %h to the current hash (h gitweb parameter) and %b to the current
 519         # hash base (hb gitweb parameter); %% expands to %.
 520
 521         # To enable system wide have in $GITWEB_CONFIG e.g.
 522         # $feature{'actions'}{'default'} = [('graphiclog',
 523         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 524         # Project specific override is not supported.
 525         'actions' => {
 526                 'override' => 0,
 527                 'default' => []},
 528
 529         # Allow gitweb scan project content tags described in ctags/
 530         # of project repository, and display the popular Web 2.0-ish
 531         # "tag cloud" near the project list. Note that this is something
 532         # COMPLETELY different from the normal Git tags.
 533
 534         # gitweb by itself can show existing tags, but it does not handle
 535         # tagging itself; you need an external application for that.
 536         # For an example script, check Girocco's cgi/tagproj.cgi.
 537         # You may want to install the HTML::TagCloud Perl module to get
 538         # a pretty tag cloud instead of just a list of tags.
 539
 540         # To enable system wide have in $GITWEB_CONFIG
 541         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 542         # Project specific override is not supported.
 543         'ctags' => {
 544                 'override' => 0,
 545                 'default' => [0]},
 546
 547         # The maximum number of patches in a patchset generated in patch
 548         # view. Set this to 0 or undef to disable patch view, or to a
 549         # negative number to remove any limit.
 550
 551         # To disable system wide have in $GITWEB_CONFIG
 552         # $feature{'patches'}{'default'} = [0];
 553         # To have project specific config enable override in $GITWEB_CONFIG
 554         # $feature{'patches'}{'override'} = 1;
 555         # and in project config gitweb.patches = 0|n;
 556         # where n is the maximum number of patches allowed in a patchset.
 557         'patches' => {
 558                 'sub' => \&feature_patches,
 559                 'override' => 0,
 560                 'default' => [16]},
 561
 562         # Avatar support. When this feature is enabled, views such as
 563         # shortlog or commit will display an avatar associated with
 564         # the email of the committer(s) and/or author(s).
 565
 566         # Currently available providers are gravatar and picon.
 567         # If an unknown provider is specified, the feature is disabled.
 568
 569         # Gravatar depends on Digest::MD5.
 570         # Picon currently relies on the indiana.edu database.
 571
 572         # To enable system wide have in $GITWEB_CONFIG
 573         # $feature{'avatar'}{'default'} = ['<provider>'];
 574         # where <provider> is either gravatar or picon.
 575         # To have project specific config enable override in $GITWEB_CONFIG
 576         # $feature{'avatar'}{'override'} = 1;
 577         # and in project config gitweb.avatar = <provider>;
 578         'avatar' => {
 579                 'sub' => \&feature_avatar,
 580                 'override' => 0,
 581                 'default' => ['']},
 582
 583         # Enable displaying how much time and how many git commands
 584         # it took to generate and display page.  Disabled by default.
 585         # Project specific override is not supported.
 586         'timed' => {
 587                 'override' => 0,
 588                 'default' => [0]},
 589
 590         # Enable turning some links into links to actions which require
 591         # JavaScript to run (like 'blame_incremental').  Not enabled by
 592         # default.  Project specific override is currently not supported.
 593         'javascript-actions' => {
 594                 'override' => 0,
 595                 'default' => [0]},
 596
 597         # Syntax highlighting support. This is based on Daniel Svensson's
 598         # and Sham Chukoury's work in gitweb-xmms2.git.
 599         # It requires the 'highlight' program present in $PATH,
 600         # and therefore is disabled by default.
 601
 602         # To enable system wide have in $GITWEB_CONFIG
 603         # $feature{'highlight'}{'default'} = [1];
 604
 605         'highlight' => {
 606                 'sub' => sub { feature_bool('highlight', @_) },
 607                 'override' => 0,
 608                 'default' => [0]},
 609 );
 610
 611 sub gitweb_get_feature {
 612         my ($name) = @_;
 613         return unless exists $feature{$name};
 614         my ($sub, $override, @defaults) = (
 615                 $feature{$name}{'sub'},
 616                 $feature{$name}{'override'},
 617                 @{$feature{$name}{'default'}});
 618         # project specific override is possible only if we have project
 619         our $git_dir; # global variable, declared later
 620         if (!$override || !defined $git_dir) {
 621                 return @defaults;
 622         }
 623         if (!defined $sub) {
 624                 warn "feature $name is not overridable";
 625                 return @defaults;
 626         }
 627         return $sub->(@defaults);
 628 }
 629
 630 # A wrapper to check if a given feature is enabled.
 631 # With this, you can say
 632 #
 633 #   my $bool_feat = gitweb_check_feature('bool_feat');
 634 #   gitweb_check_feature('bool_feat') or somecode;
 635 #
 636 # instead of
 637 #
 638 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 639 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 640 #
 641 sub gitweb_check_feature {
 642         return (gitweb_get_feature(@_))[0];
 643 }
 644
 645
 646 sub feature_bool {
 647         my $key = shift;
 648         my ($val) = git_get_project_config($key, '--bool');
 649
 650         if (!defined $val) {
 651                 return ($_[0]);
 652         } elsif ($val eq 'true') {
 653                 return (1);
 654         } elsif ($val eq 'false') {
 655                 return (0);
 656         }
 657 }
 658
 659 sub feature_snapshot {
 660         my (@fmts) = @_;
 661
 662         my ($val) = git_get_project_config('snapshot');
 663
 664         if ($val) {
 665                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 666         }
 667
 668         return @fmts;
 669 }
 670
 671 sub feature_patches {
 672         my @val = (git_get_project_config('patches', '--int'));
 673
 674         if (@val) {
 675                 return @val;
 676         }
 677
 678         return ($_[0]);
 679 }
 680
 681 sub feature_avatar {
 682         my @val = (git_get_project_config('avatar'));
 683
 684         return @val ? @val : @_;
 685 }
 686
 687 # checking HEAD file with -e is fragile if the repository was
 688 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 689 # and then pruned.
 690 sub check_head_link {
 691         my ($dir) = @_;
 692         my $headfile = "$dir/HEAD";
 693         return ((-e $headfile) ||
 694                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 695 }
 696
 697 sub check_export_ok {
 698         my ($dir) = @_;
 699         return (check_head_link($dir) &&
 700                 (!$export_ok || -e "$dir/$export_ok") &&
 701                 (!$export_auth_hook || $export_auth_hook->($dir)));
 702 }
 703
 704 # process alternate names for backward compatibility
 705 # filter out unsupported (unknown) snapshot formats
 706 sub filter_snapshot_fmts {
 707         my @fmts = @_;
 708
 709         @fmts = map {
 710                 exists $known_snapshot_format_aliases{$_} ?
 711                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 712         @fmts = grep {
 713                 exists $known_snapshot_formats{$_} &&
 714                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 715 }
 716
 717 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 718 sub evaluate_gitweb_config {
 719         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 720         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 721         # die if there are errors parsing config file
 722         if (-e $GITWEB_CONFIG) {
 723                 do $GITWEB_CONFIG;
 724                 die $@ if $@;
 725         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 726                 do $GITWEB_CONFIG_SYSTEM;
 727                 die $@ if $@;
 728         }
 729 }
 730
 731 # Get loadavg of system, to compare against $maxload.
 732 # Currently it requires '/proc/loadavg' present to get loadavg;
 733 # if it is not present it returns 0, which means no load checking.
 734 sub get_loadavg {
 735         if( -e '/proc/loadavg' ){
 736                 open my $fd, '<', '/proc/loadavg'
 737                         or return 0;
 738                 my @load = split(/\s+/, scalar <$fd>);
 739                 close $fd;
 740
 741                 # The first three columns measure CPU and IO utilization of the last one,
 742                 # five, and 10 minute periods.  The fourth column shows the number of
 743                 # currently running processes and the total number of processes in the m/n
 744                 # format.  The last column displays the last process ID used.
 745                 return $load[0] || 0;
 746         }
 747         # additional checks for load average should go here for things that don't export
 748         # /proc/loadavg
 749
 750         return 0;
 751 }
 752
 753 # version of the core git binary
 754 our $git_version;
 755 sub evaluate_git_version {
 756         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 757         $number_of_git_cmds++;
 758 }
 759
 760 sub check_loadavg {
 761         if (defined $maxload && get_loadavg() > $maxload) {
 762                 die_error(503, "The load average on the server is too high");
 763         }
 764 }
 765
 766 # ======================================================================
 767 # input validation and dispatch
 768
 769 # input parameters can be collected from a variety of sources (presently, CGI
 770 # and PATH_INFO), so we define an %input_params hash that collects them all
 771 # together during validation: this allows subsequent uses (e.g. href()) to be
 772 # agnostic of the parameter origin
 773
 774 our %input_params = ();
 775
 776 # input parameters are stored with the long parameter name as key. This will
 777 # also be used in the href subroutine to convert parameters to their CGI
 778 # equivalent, and since the href() usage is the most frequent one, we store
 779 # the name -> CGI key mapping here, instead of the reverse.
 780 #
 781 # XXX: Warning: If you touch this, check the search form for updating,
 782 # too.
 783
 784 our @cgi_param_mapping = (
 785         project => "p",
 786         action => "a",
 787         file_name => "f",
 788         file_parent => "fp",
 789         hash => "h",
 790         hash_parent => "hp",
 791         hash_base => "hb",
 792         hash_parent_base => "hpb",
 793         page => "pg",
 794         order => "o",
 795         searchtext => "s",
 796         searchtype => "st",
 797         snapshot_format => "sf",
 798         extra_options => "opt",
 799         search_use_regexp => "sr",
 800         # this must be last entry (for manipulation from JavaScript)
 801         javascript => "js"
 802 );
 803 our %cgi_param_mapping = @cgi_param_mapping;
 804
 805 # we will also need to know the possible actions, for validation
 806 our %actions = (
 807         "blame" => \&git_blame,
 808         "blame_incremental" => \&git_blame_incremental,
 809         "blame_data" => \&git_blame_data,
 810         "blobdiff" => \&git_blobdiff,
 811         "blobdiff_plain" => \&git_blobdiff_plain,
 812         "blob" => \&git_blob,
 813         "blob_plain" => \&git_blob_plain,
 814         "commitdiff" => \&git_commitdiff,
 815         "commitdiff_plain" => \&git_commitdiff_plain,
 816         "commit" => \&git_commit,
 817         "forks" => \&git_forks,
 818         "heads" => \&git_heads,
 819         "history" => \&git_history,
 820         "log" => \&git_log,
 821         "patch" => \&git_patch,
 822         "patches" => \&git_patches,
 823         "rss" => \&git_rss,
 824         "atom" => \&git_atom,
 825         "search" => \&git_search,
 826         "search_help" => \&git_search_help,
 827         "shortlog" => \&git_shortlog,
 828         "summary" => \&git_summary,
 829         "tag" => \&git_tag,
 830         "tags" => \&git_tags,
 831         "tree" => \&git_tree,
 832         "snapshot" => \&git_snapshot,
 833         "object" => \&git_object,
 834         # those below don't need $project
 835         "opml" => \&git_opml,
 836         "project_list" => \&git_project_list,
 837         "project_index" => \&git_project_index,
 838 );
 839
 840 # finally, we have the hash of allowed extra_options for the commands that
 841 # allow them
 842 our %allowed_options = (
 843         "--no-merges" => [ qw(rss atom log shortlog history) ],
 844 );
 845
 846 our %actions_info = ();
 847 sub evaluate_actions_info {
 848         our %actions_info;
 849         our (%actions);
 850
 851         # unless explicitely stated otherwise, default output format is html
 852         foreach my $action (keys %actions) {
 853                 $actions_info{$action}{'output_format'} = 'html';
 854         }
 855         # list all exceptions; undef means variable (no definite format)
 856         map { $actions_info{$_}{'output_format'} = 'text' }
 857                 qw(commitdiff_plain patch patches project_index blame_data);
 858         map { $actions_info{$_}{'output_format'} = 'xml' }
 859                 qw(rss atom opml); # there are different types (document formats) of XML
 860         map { $actions_info{$_}{'output_format'} = undef }
 861                 qw(blob_plain object);
 862         $actions_info{'snapshot'}{'output_format'} = 'binary';
 863 }
 864
 865 sub action_outputs_html {
 866         my $action = shift;
 867         return $actions_info{$action}{'output_format'} eq 'html';
 868 }
 869
 870 sub browser_is_robot {
 871         return 1 if !exists $ENV{'HTTP_USER_AGENT'}; # gitweb run as script
 872         if (eval { require HTTP::BrowserDetect; }) {
 873                 my $browser = HTTP::BrowserDetect->new();
 874                 return $browser->robot();
 875         }
 876         # fallback on detecting known web browsers
 877         return 0 if ($ENV{'HTTP_USER_AGENT'} =~ /\b(?:Mozilla|Opera|Safari|IE)\b/);
 878         # be conservative; if not sure, assume non-interactive
 879         return 1;
 880 }
 881
 882 # fill %input_params with the CGI parameters. All values except for 'opt'
 883 # should be single values, but opt can be an array. We should probably
 884 # build an array of parameters that can be multi-valued, but since for the time
 885 # being it's only this one, we just single it out
 886 sub evaluate_query_params {
 887         our $cgi;
 888
 889         while (my ($name, $symbol) = each %cgi_param_mapping) {
 890                 if ($symbol eq 'opt') {
 891                         $input_params{$name} = [ $cgi->param($symbol) ];
 892                 } else {
 893                         $input_params{$name} = $cgi->param($symbol);
 894                 }
 895         }
 896 }
 897
 898 # now read PATH_INFO and update the parameter list for missing parameters
 899 sub evaluate_path_info {
 900         return if defined $input_params{'project'};
 901         return if !$path_info;
 902         $path_info =~ s,^/+,,;
 903         return if !$path_info;
 904
 905         # find which part of PATH_INFO is project
 906         my $project = $path_info;
 907         $project =~ s,/+$,,;
 908         while ($project && !check_head_link("$projectroot/$project")) {
 909                 $project =~ s,/*[^/]*$,,;
 910         }
 911         return unless $project;
 912         $input_params{'project'} = $project;
 913
 914         # do not change any parameters if an action is given using the query string
 915         return if $input_params{'action'};
 916         $path_info =~ s,^\Q$project\E/*,,;
 917
 918         # next, check if we have an action
 919         my $action = $path_info;
 920         $action =~ s,/.*$,,;
 921         if (exists $actions{$action}) {
 922                 $path_info =~ s,^$action/*,,;
 923                 $input_params{'action'} = $action;
 924         }
 925
 926         # list of actions that want hash_base instead of hash, but can have no
 927         # pathname (f) parameter
 928         my @wants_base = (
 929                 'tree',
 930                 'history',
 931         );
 932
 933         # we want to catch, among others
 934         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 935         my ($parentrefname, $parentpathname, $refname, $pathname) =
 936                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 937
 938         # first, analyze the 'current' part
 939         if (defined $pathname) {
 940                 # we got "branch:filename" or "branch:dir/"
 941                 # we could use git_get_type(branch:pathname), but:
 942                 # - it needs $git_dir
 943                 # - it does a git() call
 944                 # - the convention of terminating directories with a slash
 945                 #   makes it superfluous
 946                 # - embedding the action in the PATH_INFO would make it even
 947                 #   more superfluous
 948                 $pathname =~ s,^/+,,;
 949                 if (!$pathname || substr($pathname, -1) eq "/") {
 950                         $input_params{'action'} ||= "tree";
 951                         $pathname =~ s,/$,,;
 952                 } else {
 953                         # the default action depends on whether we had parent info
 954                         # or not
 955                         if ($parentrefname) {
 956                                 $input_params{'action'} ||= "blobdiff_plain";
 957                         } else {
 958                                 $input_params{'action'} ||= "blob_plain";
 959                         }
 960                 }
 961                 $input_params{'hash_base'} ||= $refname;
 962                 $input_params{'file_name'} ||= $pathname;
 963         } elsif (defined $refname) {
 964                 # we got "branch". In this case we have to choose if we have to
 965                 # set hash or hash_base.
 966                 #
 967                 # Most of the actions without a pathname only want hash to be
 968                 # set, except for the ones specified in @wants_base that want
 969                 # hash_base instead. It should also be noted that hand-crafted
 970                 # links having 'history' as an action and no pathname or hash
 971                 # set will fail, but that happens regardless of PATH_INFO.
 972                 if (defined $parentrefname) {
 973                         # if there is parent let the default be 'shortlog' action
 974                         # (for http://git.example.com/repo.git/A..B links); if there
 975                         # is no parent, dispatch will detect type of object and set
 976                         # action appropriately if required (if action is not set)
 977                         $input_params{'action'} ||= "shortlog";
 978                 }
 979                 if ($input_params{'action'} &&
 980                     grep { $_ eq $input_params{'action'} } @wants_base) {
 981                         $input_params{'hash_base'} ||= $refname;
 982                 } else {
 983                         $input_params{'hash'} ||= $refname;
 984                 }
 985         }
 986
 987         # next, handle the 'parent' part, if present
 988         if (defined $parentrefname) {
 989                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 990                 # someproject/blobdiff/oldrev..newrev:/filename
 991                 if ($parentpathname) {
 992                         $parentpathname =~ s,^/+,,;
 993                         $parentpathname =~ s,/$,,;
 994                         $input_params{'file_parent'} ||= $parentpathname;
 995                 } else {
 996                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 997                 }
 998                 # we assume that hash_parent_base is wanted if a path was specified,
 999                 # or if the action wants hash_base instead of hash
1000                 if (defined $input_params{'file_parent'} ||
1001                         grep { $_ eq $input_params{'action'} } @wants_base) {
1002                         $input_params{'hash_parent_base'} ||= $parentrefname;
1003                 } else {
1004                         $input_params{'hash_parent'} ||= $parentrefname;
1005                 }
1006         }
1007
1008         # for the snapshot action, we allow URLs in the form
1009         # $project/snapshot/$hash.ext
1010         # where .ext determines the snapshot and gets removed from the
1011         # passed $refname to provide the $hash.
1012         #
1013         # To be able to tell that $refname includes the format extension, we
1014         # require the following two conditions to be satisfied:
1015         # - the hash input parameter MUST have been set from the $refname part
1016         #   of the URL (i.e. they must be equal)
1017         # - the snapshot format MUST NOT have been defined already (e.g. from
1018         #   CGI parameter sf)
1019         # It's also useless to try any matching unless $refname has a dot,
1020         # so we check for that too
1021         if (defined $input_params{'action'} &&
1022                 $input_params{'action'} eq 'snapshot' &&
1023                 defined $refname && index($refname, '.') != -1 &&
1024                 $refname eq $input_params{'hash'} &&
1025                 !defined $input_params{'snapshot_format'}) {
1026                 # We loop over the known snapshot formats, checking for
1027                 # extensions. Allowed extensions are both the defined suffix
1028                 # (which includes the initial dot already) and the snapshot
1029                 # format key itself, with a prepended dot
1030                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1031                         my $hash = $refname;
1032                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1033                                 next;
1034                         }
1035                         my $sfx = $1;
1036                         # a valid suffix was found, so set the snapshot format
1037                         # and reset the hash parameter
1038                         $input_params{'snapshot_format'} = $fmt;
1039                         $input_params{'hash'} = $hash;
1040                         # we also set the format suffix to the one requested
1041                         # in the URL: this way a request for e.g. .tgz returns
1042                         # a .tgz instead of a .tar.gz
1043                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1044                         last;
1045                 }
1046         }
1047 }
1048
1049 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1050      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1051      $searchtext, $search_regexp);
1052 sub evaluate_and_validate_params {
1053         our $action = $input_params{'action'};
1054         if (defined $action) {
1055                 if (!validate_action($action)) {
1056                         die_error(400, "Invalid action parameter");
1057                 }
1058         }
1059
1060         # parameters which are pathnames
1061         our $project = $input_params{'project'};
1062         if (defined $project) {
1063                 if (!validate_project($project)) {
1064                         undef $project;
1065                         die_error(404, "No such project");
1066                 }
1067         }
1068
1069         our $file_name = $input_params{'file_name'};
1070         if (defined $file_name) {
1071                 if (!validate_pathname($file_name)) {
1072                         die_error(400, "Invalid file parameter");
1073                 }
1074         }
1075
1076         our $file_parent = $input_params{'file_parent'};
1077         if (defined $file_parent) {
1078                 if (!validate_pathname($file_parent)) {
1079                         die_error(400, "Invalid file parent parameter");
1080                 }
1081         }
1082
1083         # parameters which are refnames
1084         our $hash = $input_params{'hash'};
1085         if (defined $hash) {
1086                 if (!validate_refname($hash)) {
1087                         die_error(400, "Invalid hash parameter");
1088                 }
1089         }
1090
1091         our $hash_parent = $input_params{'hash_parent'};
1092         if (defined $hash_parent) {
1093                 if (!validate_refname($hash_parent)) {
1094                         die_error(400, "Invalid hash parent parameter");
1095                 }
1096         }
1097
1098         our $hash_base = $input_params{'hash_base'};
1099         if (defined $hash_base) {
1100                 if (!validate_refname($hash_base)) {
1101                         die_error(400, "Invalid hash base parameter");
1102                 }
1103         }
1104
1105         our @extra_options = @{$input_params{'extra_options'}};
1106         # @extra_options is always defined, since it can only be (currently) set from
1107         # CGI, and $cgi->param() returns the empty array in array context if the param
1108         # is not set
1109         foreach my $opt (@extra_options) {
1110                 if (not exists $allowed_options{$opt}) {
1111                         die_error(400, "Invalid option parameter");
1112                 }
1113                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1114                         die_error(400, "Invalid option parameter for this action");
1115                 }
1116         }
1117
1118         our $hash_parent_base = $input_params{'hash_parent_base'};
1119         if (defined $hash_parent_base) {
1120                 if (!validate_refname($hash_parent_base)) {
1121                         die_error(400, "Invalid hash parent base parameter");
1122                 }
1123         }
1124
1125         # other parameters
1126         our $page = $input_params{'page'};
1127         if (defined $page) {
1128                 if ($page =~ m/[^0-9]/) {
1129                         die_error(400, "Invalid page parameter");
1130                 }
1131         }
1132
1133         our $searchtype = $input_params{'searchtype'};
1134         if (defined $searchtype) {
1135                 if ($searchtype =~ m/[^a-z]/) {
1136                         die_error(400, "Invalid searchtype parameter");
1137                 }
1138         }
1139
1140         our $search_use_regexp = $input_params{'search_use_regexp'};
1141
1142         our $searchtext = $input_params{'searchtext'};
1143         our $search_regexp;
1144         if (defined $searchtext) {
1145                 if (length($searchtext) < 2) {
1146                         die_error(403, "At least two characters are required for search parameter");
1147                 }
1148                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1149         }
1150 }
1151
1152 # path to the current git repository
1153 our $git_dir;
1154 sub evaluate_git_dir {
1155         our $git_dir = "$projectroot/$project" if $project;
1156 }
1157
1158 our (@snapshot_fmts, $git_avatar);
1159 sub configure_gitweb_features {
1160         # list of supported snapshot formats
1161         our @snapshot_fmts = gitweb_get_feature('snapshot');
1162         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1163
1164         # check that the avatar feature is set to a known provider name,
1165         # and for each provider check if the dependencies are satisfied.
1166         # if the provider name is invalid or the dependencies are not met,
1167         # reset $git_avatar to the empty string.
1168         our ($git_avatar) = gitweb_get_feature('avatar');
1169         if ($git_avatar eq 'gravatar') {
1170                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1171         } elsif ($git_avatar eq 'picon') {
1172                 # no dependencies
1173         } else {
1174                 $git_avatar = '';
1175         }
1176 }
1177
1178 # custom error handler: 'die <message>' is Internal Server Error
1179 sub handle_errors_html {
1180         my $msg = shift; # it is already HTML escaped
1181
1182         # to avoid infinite loop where error occurs in die_error,
1183         # change handler to default handler, disabling handle_errors_html
1184         set_message("Error occured when inside die_error:\n$msg");
1185
1186         # you cannot jump out of die_error when called as error handler;
1187         # the subroutine set via CGI::Carp::set_message is called _after_
1188         # HTTP headers are already written, so it cannot write them itself
1189         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1190 }
1191 set_message(\&handle_errors_html);
1192
1193 # dispatch
1194 sub dispatch {
1195         if (!defined $action) {
1196                 if (defined $hash) {
1197                         $action = git_get_type($hash);
1198                 } elsif (defined $hash_base && defined $file_name) {
1199                         $action = git_get_type("$hash_base:$file_name");
1200                 } elsif (defined $project) {
1201                         $action = 'summary';
1202                 } else {
1203                         $action = 'project_list';
1204                 }
1205         }
1206         if (!defined($actions{$action})) {
1207                 die_error(400, "Unknown action");
1208         }
1209         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1210             !$project) {
1211                 die_error(400, "Project needed");
1212         }
1213
1214         if ($caching_enabled) {
1215                 # human readable key identifying gitweb output
1216                 my $output_key = href(-replay => 1, -full => 1, -path_info => 0);
1217
1218                 cache_output($cache, $capture, $output_key, $actions{$action});
1219         } else {
1220                 $actions{$action}->();
1221         }
1222 }
1223
1224 sub reset_timer {
1225         our $t0 = [Time::HiRes::gettimeofday()]
1226                 if defined $t0;
1227         our $number_of_git_cmds = 0;
1228 }
1229
1230 sub run_request {
1231         reset_timer();
1232
1233         evaluate_uri();
1234         evaluate_gitweb_config();
1235         evaluate_git_version();
1236         check_loadavg();
1237         configure_caching()
1238                 if ($caching_enabled);
1239
1240         # $projectroot and $projects_list might be set in gitweb config file
1241         $projects_list ||= $projectroot;
1242
1243         evaluate_query_params();
1244         evaluate_path_info();
1245         evaluate_and_validate_params();
1246         evaluate_git_dir();
1247
1248         configure_gitweb_features();
1249
1250         dispatch();
1251 }
1252
1253 our $is_last_request = sub { 1 };
1254 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1255 our $CGI = 'CGI';
1256 our $cgi;
1257 sub configure_as_fcgi {
1258         require CGI::Fast;
1259         our $CGI = 'CGI::Fast';
1260
1261         my $request_number = 0;
1262         # let each child service 100 requests
1263         our $is_last_request = sub { ++$request_number > 100 };
1264 }
1265 sub evaluate_argv {
1266         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1267         configure_as_fcgi()
1268                 if $script_name =~ /\.fcgi$/;
1269
1270         return unless (@ARGV);
1271
1272         require Getopt::Long;
1273         Getopt::Long::GetOptions(
1274                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1275                 'nproc|n=i' => sub {
1276                         my ($arg, $val) = @_;
1277                         return unless eval { require FCGI::ProcManager; 1; };
1278                         my $proc_manager = FCGI::ProcManager->new({
1279                                 n_processes => $val,
1280                         });
1281                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1282                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1283                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1284                 },
1285         );
1286 }
1287
1288 sub run {
1289         evaluate_argv();
1290         evaluate_actions_info();
1291
1292         $pre_listen_hook->()
1293                 if $pre_listen_hook;
1294
1295  REQUEST:
1296         while ($cgi = $CGI->new()) {
1297                 $pre_dispatch_hook->()
1298                         if $pre_dispatch_hook;
1299
1300                 run_request();
1301
1302                 $post_dispatch_hook->()
1303                         if $post_dispatch_hook;
1304
1305                 last REQUEST if ($is_last_request->());
1306         }
1307
1308  DONE_GITWEB:
1309         1;
1310 }
1311
1312 sub configure_caching {
1313         if (!eval { require GitwebCache::CacheOutput; 1; }) {
1314                 # cache is configured _before_ handling request, so $cgi is not defined,
1315                 # so we can't just "die" with sending error message to web browser
1316                 #die_error(500, "Caching enabled and GitwebCache::CacheOutput not found");
1317
1318                 # turn off caching and warn instead
1319                 $caching_enabled = 0;
1320                 warn "Caching enabled and GitwebCache::CacheOutput not found";
1321         }
1322         GitwebCache::CacheOutput->import();
1323
1324         # $cache might be initialized (instantiated) cache, i.e. cache object,
1325         # or it might be name of class, or it might be undefined
1326         unless (defined $cache && ref($cache)) {
1327                 $cache ||= 'GitwebCache::FileCacheWithLocking';
1328                 eval "require $cache";
1329                 die $@ if $@;
1330                 $cache = $cache->new({
1331                         %cache_options,
1332                         #'cache_root' => '/tmp/cache',
1333                         #'cache_depth' => 2,
1334                         #'expires_in' => 20, # in seconds (CHI compatibile)
1335                         # (Cache::Cache compatibile initialization)
1336                         'default_expires_in' => $cache_options{'expires_in'},
1337                         # (CHI compatibile initialization)
1338                         'root_dir' => $cache_options{'cache_root'},
1339                         'depth' => $cache_options{'cache_depth'},
1340                 });
1341         }
1342         unless (defined $capture && ref($capture)) {
1343                 require GitwebCache::Capture::Simple;
1344                 $capture = GitwebCache::Capture::Simple->new();
1345         }
1346 }
1347
1348 run();
1349
1350 if (defined caller) {
1351         # wrapped in a subroutine processing requests,
1352         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1353         return;
1354 } else {
1355         # pure CGI script, serving single request
1356         exit;
1357 }
1358
1359 ## ======================================================================
1360 ## action links
1361
1362 # possible values of extra options
1363 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1364 # -replay => 1      - start from a current view (replay with modifications)
1365 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1366 sub href {
1367         my %params = @_;
1368         # default is to use -absolute url() i.e. $my_uri
1369         my $href = $params{-full} ? $my_url : $my_uri;
1370
1371         $params{'project'} = $project unless exists $params{'project'};
1372
1373         if ($params{-replay}) {
1374                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1375                         if (!exists $params{$name}) {
1376                                 $params{$name} = $input_params{$name};
1377                         }
1378                 }
1379         }
1380
1381         my $use_pathinfo = gitweb_check_feature('pathinfo');
1382         if (defined $params{'project'} &&
1383             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1384                 # try to put as many parameters as possible in PATH_INFO:
1385                 #   - project name
1386                 #   - action
1387                 #   - hash_parent or hash_parent_base:/file_parent
1388                 #   - hash or hash_base:/filename
1389                 #   - the snapshot_format as an appropriate suffix
1390
1391                 # When the script is the root DirectoryIndex for the domain,
1392                 # $href here would be something like http://gitweb.example.com/
1393                 # Thus, we strip any trailing / from $href, to spare us double
1394                 # slashes in the final URL
1395                 $href =~ s,/$,,;
1396
1397                 # Then add the project name, if present
1398                 $href .= "/".esc_url($params{'project'});
1399                 delete $params{'project'};
1400
1401                 # since we destructively absorb parameters, we keep this
1402                 # boolean that remembers if we're handling a snapshot
1403                 my $is_snapshot = $params{'action'} eq 'snapshot';
1404
1405                 # Summary just uses the project path URL, any other action is
1406                 # added to the URL
1407                 if (defined $params{'action'}) {
1408                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1409                         delete $params{'action'};
1410                 }
1411
1412                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1413                 # stripping nonexistent or useless pieces
1414                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1415                         || $params{'hash_parent'} || $params{'hash'});
1416                 if (defined $params{'hash_base'}) {
1417                         if (defined $params{'hash_parent_base'}) {
1418                                 $href .= esc_url($params{'hash_parent_base'});
1419                                 # skip the file_parent if it's the same as the file_name
1420                                 if (defined $params{'file_parent'}) {
1421                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1422                                                 delete $params{'file_parent'};
1423                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1424                                                 $href .= ":/".esc_url($params{'file_parent'});
1425                                                 delete $params{'file_parent'};
1426                                         }
1427                                 }
1428                                 $href .= "..";
1429                                 delete $params{'hash_parent'};
1430                                 delete $params{'hash_parent_base'};
1431                         } elsif (defined $params{'hash_parent'}) {
1432                                 $href .= esc_url($params{'hash_parent'}). "..";
1433                                 delete $params{'hash_parent'};
1434                         }
1435
1436                         $href .= esc_url($params{'hash_base'});
1437                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1438                                 $href .= ":/".esc_url($params{'file_name'});
1439                                 delete $params{'file_name'};
1440                         }
1441                         delete $params{'hash'};
1442                         delete $params{'hash_base'};
1443                 } elsif (defined $params{'hash'}) {
1444                         $href .= esc_url($params{'hash'});
1445                         delete $params{'hash'};
1446                 }
1447
1448                 # If the action was a snapshot, we can absorb the
1449                 # snapshot_format parameter too
1450                 if ($is_snapshot) {
1451                         my $fmt = $params{'snapshot_format'};
1452                         # snapshot_format should always be defined when href()
1453                         # is called, but just in case some code forgets, we
1454                         # fall back to the default
1455                         $fmt ||= $snapshot_fmts[0];
1456                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1457                         delete $params{'snapshot_format'};
1458                 }
1459         }
1460
1461         # now encode the parameters explicitly
1462         my @result = ();
1463         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1464                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1465                 if (defined $params{$name}) {
1466                         if (ref($params{$name}) eq "ARRAY") {
1467                                 foreach my $par (@{$params{$name}}) {
1468                                         push @result, $symbol . "=" . esc_param($par);
1469                                 }
1470                         } else {
1471                                 push @result, $symbol . "=" . esc_param($params{$name});
1472                         }
1473                 }
1474         }
1475         $href .= "?" . join(';', @result) if scalar @result;
1476
1477         return $href;
1478 }
1479
1480
1481 ## ======================================================================
1482 ## validation, quoting/unquoting and escaping
1483
1484 sub validate_action {
1485         my $input = shift || return undef;
1486         return undef unless exists $actions{$input};
1487         return $input;
1488 }
1489
1490 sub validate_project {
1491         my $input = shift || return undef;
1492         if (!validate_pathname($input) ||
1493                 !(-d "$projectroot/$input") ||
1494                 !check_export_ok("$projectroot/$input") ||
1495                 ($strict_export && !project_in_list($input))) {
1496                 return undef;
1497         } else {
1498                 return $input;
1499         }
1500 }
1501
1502 sub validate_pathname {
1503         my $input = shift || return undef;
1504
1505         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1506         # at the beginning, at the end, and between slashes.
1507         # also this catches doubled slashes
1508         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1509                 return undef;
1510         }
1511         # no null characters
1512         if ($input =~ m!\0!) {
1513                 return undef;
1514         }
1515         return $input;
1516 }
1517
1518 sub validate_refname {
1519         my $input = shift || return undef;
1520
1521         # textual hashes are O.K.
1522         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1523                 return $input;
1524         }
1525         # it must be correct pathname
1526         $input = validate_pathname($input)
1527                 or return undef;
1528         # restrictions on ref name according to git-check-ref-format
1529         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1530                 return undef;
1531         }
1532         return $input;
1533 }
1534
1535 # decode sequences of octets in utf8 into Perl's internal form,
1536 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1537 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1538 sub to_utf8 {
1539         my $str = shift;
1540         return undef unless defined $str;
1541         if (utf8::valid($str)) {
1542                 utf8::decode($str);
1543                 return $str;
1544         } else {
1545                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1546         }
1547 }
1548
1549 # quote unsafe chars, but keep the slash, even when it's not
1550 # correct, but quoted slashes look too horrible in bookmarks
1551 sub esc_param {
1552         my $str = shift;
1553         return undef unless defined $str;
1554         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1555         $str =~ s/ /\+/g;
1556         return $str;
1557 }
1558
1559 # quote unsafe chars in whole URL, so some characters cannot be quoted
1560 sub esc_url {
1561         my $str = shift;
1562         return undef unless defined $str;
1563         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1564         $str =~ s/ /\+/g;
1565         return $str;
1566 }
1567
1568 # replace invalid utf8 character with SUBSTITUTION sequence
1569 sub esc_html {
1570         my $str = shift;
1571         my %opts = @_;
1572
1573         return undef unless defined $str;
1574
1575         $str = to_utf8($str);
1576         $str = $cgi->escapeHTML($str);
1577         if ($opts{'-nbsp'}) {
1578                 $str =~ s/ /&nbsp;/g;
1579         }
1580         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1581         return $str;
1582 }
1583
1584 # quote control characters and escape filename to HTML
1585 sub esc_path {
1586         my $str = shift;
1587         my %opts = @_;
1588
1589         return undef unless defined $str;
1590
1591         $str = to_utf8($str);
1592         $str = $cgi->escapeHTML($str);
1593         if ($opts{'-nbsp'}) {
1594                 $str =~ s/ /&nbsp;/g;
1595         }
1596         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1597         return $str;
1598 }
1599
1600 # Make control characters "printable", using character escape codes (CEC)
1601 sub quot_cec {
1602         my $cntrl = shift;
1603         my %opts = @_;
1604         my %es = ( # character escape codes, aka escape sequences
1605                 "\t" => '\t',   # tab            (HT)
1606                 "\n" => '\n',   # line feed      (LF)
1607                 "\r" => '\r',   # carrige return (CR)
1608                 "\f" => '\f',   # form feed      (FF)
1609                 "\b" => '\b',   # backspace      (BS)
1610                 "\a" => '\a',   # alarm (bell)   (BEL)
1611                 "\e" => '\e',   # escape         (ESC)
1612                 "\013" => '\v', # vertical tab   (VT)
1613                 "\000" => '\0', # nul character  (NUL)
1614         );
1615         my $chr = ( (exists $es{$cntrl})
1616                     ? $es{$cntrl}
1617                     : sprintf('\%2x', ord($cntrl)) );
1618         if ($opts{-nohtml}) {
1619                 return $chr;
1620         } else {
1621                 return "<span class=\"cntrl\">$chr</span>";
1622         }
1623 }
1624
1625 # Alternatively use unicode control pictures codepoints,
1626 # Unicode "printable representation" (PR)
1627 sub quot_upr {
1628         my $cntrl = shift;
1629         my %opts = @_;
1630
1631         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1632         if ($opts{-nohtml}) {
1633                 return $chr;
1634         } else {
1635                 return "<span class=\"cntrl\">$chr</span>";
1636         }
1637 }
1638
1639 # git may return quoted and escaped filenames
1640 sub unquote {
1641         my $str = shift;
1642
1643         sub unq {
1644                 my $seq = shift;
1645                 my %es = ( # character escape codes, aka escape sequences
1646                         't' => "\t",   # tab            (HT, TAB)
1647                         'n' => "\n",   # newline        (NL)
1648                         'r' => "\r",   # return         (CR)
1649                         'f' => "\f",   # form feed      (FF)
1650                         'b' => "\b",   # backspace      (BS)
1651                         'a' => "\a",   # alarm (bell)   (BEL)
1652                         'e' => "\e",   # escape         (ESC)
1653                         'v' => "\013", # vertical tab   (VT)
1654                 );
1655
1656                 if ($seq =~ m/^[0-7]{1,3}$/) {
1657                         # octal char sequence
1658                         return chr(oct($seq));
1659                 } elsif (exists $es{$seq}) {
1660                         # C escape sequence, aka character escape code
1661                         return $es{$seq};
1662                 }
1663                 # quoted ordinary character
1664                 return $seq;
1665         }
1666
1667         if ($str =~ m/^"(.*)"$/) {
1668                 # needs unquoting
1669                 $str = $1;
1670                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1671         }
1672         return $str;
1673 }
1674
1675 # escape tabs (convert tabs to spaces)
1676 sub untabify {
1677         my $line = shift;
1678
1679         while ((my $pos = index($line, "\t")) != -1) {
1680                 if (my $count = (8 - ($pos % 8))) {
1681                         my $spaces = ' ' x $count;
1682                         $line =~ s/\t/$spaces/;
1683                 }
1684         }
1685
1686         return $line;
1687 }
1688
1689 sub project_in_list {
1690         my $project = shift;
1691         my @list = git_get_projects_list();
1692         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1693 }
1694
1695 ## ----------------------------------------------------------------------
1696 ## HTML aware string manipulation
1697
1698 # Try to chop given string on a word boundary between position
1699 # $len and $len+$add_len. If there is no word boundary there,
1700 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1701 # (marking chopped part) would be longer than given string.
1702 sub chop_str {
1703         my $str = shift;
1704         my $len = shift;
1705         my $add_len = shift || 10;
1706         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1707
1708         # Make sure perl knows it is utf8 encoded so we don't
1709         # cut in the middle of a utf8 multibyte char.
1710         $str = to_utf8($str);
1711
1712         # allow only $len chars, but don't cut a word if it would fit in $add_len
1713         # if it doesn't fit, cut it if it's still longer than the dots we would add
1714         # remove chopped character entities entirely
1715
1716         # when chopping in the middle, distribute $len into left and right part
1717         # return early if chopping wouldn't make string shorter
1718         if ($where eq 'center') {
1719                 return $str if ($len + 5 >= length($str)); # filler is length 5
1720                 $len = int($len/2);
1721         } else {
1722                 return $str if ($len + 4 >= length($str)); # filler is length 4
1723         }
1724
1725         # regexps: ending and beginning with word part up to $add_len
1726         my $endre = qr/.{$len}\w{0,$add_len}/;
1727         my $begre = qr/\w{0,$add_len}.{$len}/;
1728
1729         if ($where eq 'left') {
1730                 $str =~ m/^(.*?)($begre)$/;
1731                 my ($lead, $body) = ($1, $2);
1732                 if (length($lead) > 4) {
1733                         $lead = " ...";
1734                 }
1735                 return "$lead$body";
1736
1737         } elsif ($where eq 'center') {
1738                 $str =~ m/^($endre)(.*)$/;
1739                 my ($left, $str)  = ($1, $2);
1740                 $str =~ m/^(.*?)($begre)$/;
1741                 my ($mid, $right) = ($1, $2);
1742                 if (length($mid) > 5) {
1743                         $mid = " ... ";
1744                 }
1745                 return "$left$mid$right";
1746
1747         } else {
1748                 $str =~ m/^($endre)(.*)$/;
1749                 my $body = $1;
1750                 my $tail = $2;
1751                 if (length($tail) > 4) {
1752                         $tail = "... ";
1753                 }
1754                 return "$body$tail";
1755         }
1756 }
1757
1758 # takes the same arguments as chop_str, but also wraps a <span> around the
1759 # result with a title attribute if it does get chopped. Additionally, the
1760 # string is HTML-escaped.
1761 sub chop_and_escape_str {
1762         my ($str) = @_;
1763
1764         my $chopped = chop_str(@_);
1765         if ($chopped eq $str) {
1766                 return esc_html($chopped);
1767         } else {
1768                 $str =~ s/[[:cntrl:]]/?/g;
1769                 return $cgi->span({-title=>$str}, esc_html($chopped));
1770         }
1771 }
1772
1773 ## ----------------------------------------------------------------------
1774 ## functions returning short strings
1775
1776 # CSS class for given age value (in seconds)
1777 sub age_class {
1778         my $age = shift;
1779
1780         if (!defined $age) {
1781                 return "noage";
1782         } elsif ($age < 60*60*2) {
1783                 return "age0";
1784         } elsif ($age < 60*60*24*2) {
1785                 return "age1";
1786         } else {
1787                 return "age2";
1788         }
1789 }
1790
1791 # convert age in seconds to "nn units ago" string
1792 sub age_string {
1793         my $age = shift;
1794         my $age_str;
1795
1796         if ($age > 60*60*24*365*2) {
1797                 $age_str = (int $age/60/60/24/365);
1798                 $age_str .= " years ago";
1799         } elsif ($age > 60*60*24*(365/12)*2) {
1800                 $age_str = int $age/60/60/24/(365/12);
1801                 $age_str .= " months ago";
1802         } elsif ($age > 60*60*24*7*2) {
1803                 $age_str = int $age/60/60/24/7;
1804                 $age_str .= " weeks ago";
1805         } elsif ($age > 60*60*24*2) {
1806                 $age_str = int $age/60/60/24;
1807                 $age_str .= " days ago";
1808         } elsif ($age > 60*60*2) {
1809                 $age_str = int $age/60/60;
1810                 $age_str .= " hours ago";
1811         } elsif ($age > 60*2) {
1812                 $age_str = int $age/60;
1813                 $age_str .= " min ago";
1814         } elsif ($age > 2) {
1815                 $age_str = int $age;
1816                 $age_str .= " sec ago";
1817         } else {
1818                 $age_str .= " right now";
1819         }
1820         return $age_str;
1821 }
1822
1823 use constant {
1824         S_IFINVALID => 0030000,
1825         S_IFGITLINK => 0160000,
1826 };
1827
1828 # submodule/subproject, a commit object reference
1829 sub S_ISGITLINK {
1830         my $mode = shift;
1831
1832         return (($mode & S_IFMT) == S_IFGITLINK)
1833 }
1834
1835 # convert file mode in octal to symbolic file mode string
1836 sub mode_str {
1837         my $mode = oct shift;
1838
1839         if (S_ISGITLINK($mode)) {
1840                 return 'm---------';
1841         } elsif (S_ISDIR($mode & S_IFMT)) {
1842                 return 'drwxr-xr-x';
1843         } elsif (S_ISLNK($mode)) {
1844                 return 'lrwxrwxrwx';
1845         } elsif (S_ISREG($mode)) {
1846                 # git cares only about the executable bit
1847                 if ($mode & S_IXUSR) {
1848                         return '-rwxr-xr-x';
1849                 } else {
1850                         return '-rw-r--r--';
1851                 };
1852         } else {
1853                 return '----------';
1854         }
1855 }
1856
1857 # convert file mode in octal to file type string
1858 sub file_type {
1859         my $mode = shift;
1860
1861         if ($mode !~ m/^[0-7]+$/) {
1862                 return $mode;
1863         } else {
1864                 $mode = oct $mode;
1865         }
1866
1867         if (S_ISGITLINK($mode)) {
1868                 return "submodule";
1869         } elsif (S_ISDIR($mode & S_IFMT)) {
1870                 return "directory";
1871         } elsif (S_ISLNK($mode)) {
1872                 return "symlink";
1873         } elsif (S_ISREG($mode)) {
1874                 return "file";
1875         } else {
1876                 return "unknown";
1877         }
1878 }
1879
1880 # convert file mode in octal to file type description string
1881 sub file_type_long {
1882         my $mode = shift;
1883
1884         if ($mode !~ m/^[0-7]+$/) {
1885                 return $mode;
1886         } else {
1887                 $mode = oct $mode;
1888         }
1889
1890         if (S_ISGITLINK($mode)) {
1891                 return "submodule";
1892         } elsif (S_ISDIR($mode & S_IFMT)) {
1893                 return "directory";
1894         } elsif (S_ISLNK($mode)) {
1895                 return "symlink";
1896         } elsif (S_ISREG($mode)) {
1897                 if ($mode & S_IXUSR) {
1898                         return "executable";
1899                 } else {
1900                         return "file";
1901                 };
1902         } else {
1903                 return "unknown";
1904         }
1905 }
1906
1907
1908 ## ----------------------------------------------------------------------
1909 ## functions returning short HTML fragments, or transforming HTML fragments
1910 ## which don't belong to other sections
1911
1912 # format line of commit message.
1913 sub format_log_line_html {
1914         my $line = shift;
1915
1916         $line = esc_html($line, -nbsp=>1);
1917         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1918                 $cgi->a({-href => href(action=>"object", hash=>$1),
1919                                         -class => "text"}, $1);
1920         }eg;
1921
1922         return $line;
1923 }
1924
1925 # format marker of refs pointing to given object
1926
1927 # the destination action is chosen based on object type and current context:
1928 # - for annotated tags, we choose the tag view unless it's the current view
1929 #   already, in which case we go to shortlog view
1930 # - for other refs, we keep the current view if we're in history, shortlog or
1931 #   log view, and select shortlog otherwise
1932 sub format_ref_marker {
1933         my ($refs, $id) = @_;
1934         my $markers = '';
1935
1936         if (defined $refs->{$id}) {
1937                 foreach my $ref (@{$refs->{$id}}) {
1938                         # this code exploits the fact that non-lightweight tags are the
1939                         # only indirect objects, and that they are the only objects for which
1940                         # we want to use tag instead of shortlog as action
1941                         my ($type, $name) = qw();
1942                         my $indirect = ($ref =~ s/\^\{\}$//);
1943                         # e.g. tags/v2.6.11 or heads/next
1944                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1945                                 $type = $1;
1946                                 $name = $2;
1947                         } else {
1948                                 $type = "ref";
1949                                 $name = $ref;
1950                         }
1951
1952                         my $class = $type;
1953                         $class .= " indirect" if $indirect;
1954
1955                         my $dest_action = "shortlog";
1956
1957                         if ($indirect) {
1958                                 $dest_action = "tag" unless $action eq "tag";
1959                         } elsif ($action =~ /^(history|(short)?log)$/) {
1960                                 $dest_action = $action;
1961                         }
1962
1963                         my $dest = "";
1964                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1965                         $dest .= $ref;
1966
1967                         my $link = $cgi->a({
1968                                 -href => href(
1969                                         action=>$dest_action,
1970                                         hash=>$dest
1971                                 )}, $name);
1972
1973                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1974                                 $link . "</span>";
1975                 }
1976         }
1977
1978         if ($markers) {
1979                 return ' <span class="refs">'. $markers . '</span>';
1980         } else {
1981                 return "";
1982         }
1983 }
1984
1985 # format, perhaps shortened and with markers, title line
1986 sub format_subject_html {
1987         my ($long, $short, $href, $extra) = @_;
1988         $extra = '' unless defined($extra);
1989
1990         if (length($short) < length($long)) {
1991                 $long =~ s/[[:cntrl:]]/?/g;
1992                 return $cgi->a({-href => $href, -class => "list subject",
1993                                 -title => to_utf8($long)},
1994                        esc_html($short)) . $extra;
1995         } else {
1996                 return $cgi->a({-href => $href, -class => "list subject"},
1997                        esc_html($long)) . $extra;
1998         }
1999 }
2000
2001 # Rather than recomputing the url for an email multiple times, we cache it
2002 # after the first hit. This gives a visible benefit in views where the avatar
2003 # for the same email is used repeatedly (e.g. shortlog).
2004 # The cache is shared by all avatar engines (currently gravatar only), which
2005 # are free to use it as preferred. Since only one avatar engine is used for any
2006 # given page, there's no risk for cache conflicts.
2007 our %avatar_cache = ();
2008
2009 # Compute the picon url for a given email, by using the picon search service over at
2010 # http://www.cs.indiana.edu/picons/search.html
2011 sub picon_url {
2012         my $email = lc shift;
2013         if (!$avatar_cache{$email}) {
2014                 my ($user, $domain) = split('@', $email);
2015                 $avatar_cache{$email} =
2016                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2017                         "$domain/$user/" .
2018                         "users+domains+unknown/up/single";
2019         }
2020         return $avatar_cache{$email};
2021 }
2022
2023 # Compute the gravatar url for a given email, if it's not in the cache already.
2024 # Gravatar stores only the part of the URL before the size, since that's the
2025 # one computationally more expensive. This also allows reuse of the cache for
2026 # different sizes (for this particular engine).
2027 sub gravatar_url {
2028         my $email = lc shift;
2029         my $size = shift;
2030         $avatar_cache{$email} ||=
2031                 "http://www.gravatar.com/avatar/" .
2032                         Digest::MD5::md5_hex($email) . "?s=";
2033         return $avatar_cache{$email} . $size;
2034 }
2035
2036 # Insert an avatar for the given $email at the given $size if the feature
2037 # is enabled.
2038 sub git_get_avatar {
2039         my ($email, %opts) = @_;
2040         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2041         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2042         $opts{-size} ||= 'default';
2043         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2044         my $url = "";
2045         if ($git_avatar eq 'gravatar') {
2046                 $url = gravatar_url($email, $size);
2047         } elsif ($git_avatar eq 'picon') {
2048                 $url = picon_url($email);
2049         }
2050         # Other providers can be added by extending the if chain, defining $url
2051         # as needed. If no variant puts something in $url, we assume avatars
2052         # are completely disabled/unavailable.
2053         if ($url) {
2054                 return $pre_white .
2055                        "<img width=\"$size\" " .
2056                             "class=\"avatar\" " .
2057                             "src=\"$url\" " .
2058                             "alt=\"\" " .
2059                        "/>" . $post_white;
2060         } else {
2061                 return "";
2062         }
2063 }
2064
2065 sub format_search_author {
2066         my ($author, $searchtype, $displaytext) = @_;
2067         my $have_search = gitweb_check_feature('search');
2068
2069         if ($have_search) {
2070                 my $performed = "";
2071                 if ($searchtype eq 'author') {
2072                         $performed = "authored";
2073                 } elsif ($searchtype eq 'committer') {
2074                         $performed = "committed";
2075                 }
2076
2077                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2078                                 searchtext=>$author,
2079                                 searchtype=>$searchtype), class=>"list",
2080                                 title=>"Search for commits $performed by $author"},
2081                                 $displaytext);
2082
2083         } else {
2084                 return $displaytext;
2085         }
2086 }
2087
2088 # format the author name of the given commit with the given tag
2089 # the author name is chopped and escaped according to the other
2090 # optional parameters (see chop_str).
2091 sub format_author_html {
2092         my $tag = shift;
2093         my $co = shift;
2094         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2095         return "<$tag class=\"author\">" .
2096                format_search_author($co->{'author_name'}, "author",
2097                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2098                        $author) .
2099                "</$tag>";
2100 }
2101
2102 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2103 sub format_git_diff_header_line {
2104         my $line = shift;
2105         my $diffinfo = shift;
2106         my ($from, $to) = @_;
2107
2108         if ($diffinfo->{'nparents'}) {
2109                 # combined diff
2110                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2111                 if ($to->{'href'}) {
2112                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2113                                          esc_path($to->{'file'}));
2114                 } else { # file was deleted (no href)
2115                         $line .= esc_path($to->{'file'});
2116                 }
2117         } else {
2118                 # "ordinary" diff
2119                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2120                 if ($from->{'href'}) {
2121                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2122                                          'a/' . esc_path($from->{'file'}));
2123                 } else { # file was added (no href)
2124                         $line .= 'a/' . esc_path($from->{'file'});
2125                 }
2126                 $line .= ' ';
2127                 if ($to->{'href'}) {
2128                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2129                                          'b/' . esc_path($to->{'file'}));
2130                 } else { # file was deleted
2131                         $line .= 'b/' . esc_path($to->{'file'});
2132                 }
2133         }
2134
2135         return "<div class=\"diff header\">$line</div>\n";
2136 }
2137
2138 # format extended diff header line, before patch itself
2139 sub format_extended_diff_header_line {
2140         my $line = shift;
2141         my $diffinfo = shift;
2142         my ($from, $to) = @_;
2143
2144         # match <path>
2145         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2146                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2147                                        esc_path($from->{'file'}));
2148         }
2149         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2150                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2151                                  esc_path($to->{'file'}));
2152         }
2153         # match single <mode>
2154         if ($line =~ m/\s(\d{6})$/) {
2155                 $line .= '<span class="info"> (' .
2156                          file_type_long($1) .
2157                          ')</span>';
2158         }
2159         # match <hash>
2160         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2161                 # can match only for combined diff
2162                 $line = 'index ';
2163                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2164                         if ($from->{'href'}[$i]) {
2165                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2166                                                   -class=>"hash"},
2167                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2168                         } else {
2169                                 $line .= '0' x 7;
2170                         }
2171                         # separator
2172                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2173                 }
2174                 $line .= '..';
2175                 if ($to->{'href'}) {
2176                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2177                                          substr($diffinfo->{'to_id'},0,7));
2178                 } else {
2179                         $line .= '0' x 7;
2180                 }
2181
2182         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2183                 # can match only for ordinary diff
2184                 my ($from_link, $to_link);
2185                 if ($from->{'href'}) {
2186                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2187                                              substr($diffinfo->{'from_id'},0,7));
2188                 } else {
2189                         $from_link = '0' x 7;
2190                 }
2191                 if ($to->{'href'}) {
2192                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2193                                            substr($diffinfo->{'to_id'},0,7));
2194                 } else {
2195                         $to_link = '0' x 7;
2196                 }
2197                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2198                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2199         }
2200
2201         return $line . "<br/>\n";
2202 }
2203
2204 # format from-file/to-file diff header
2205 sub format_diff_from_to_header {
2206         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2207         my $line;
2208         my $result = '';
2209
2210         $line = $from_line;
2211         #assert($line =~ m/^---/) if DEBUG;
2212         # no extra formatting for "^--- /dev/null"
2213         if (! $diffinfo->{'nparents'}) {
2214                 # ordinary (single parent) diff
2215                 if ($line =~ m!^--- "?a/!) {
2216                         if ($from->{'href'}) {
2217                                 $line = '--- a/' .
2218                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2219                                                 esc_path($from->{'file'}));
2220                         } else {
2221                                 $line = '--- a/' .
2222                                         esc_path($from->{'file'});
2223                         }
2224                 }
2225                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2226
2227         } else {
2228                 # combined diff (merge commit)
2229                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2230                         if ($from->{'href'}[$i]) {
2231                                 $line = '--- ' .
2232                                         $cgi->a({-href=>href(action=>"blobdiff",
2233                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2234                                                              hash_parent_base=>$parents[$i],
2235                                                              file_parent=>$from->{'file'}[$i],
2236                                                              hash=>$diffinfo->{'to_id'},
2237                                                              hash_base=>$hash,
2238                                                              file_name=>$to->{'file'}),
2239                                                  -class=>"path",
2240                                                  -title=>"diff" . ($i+1)},
2241                                                 $i+1) .
2242                                         '/' .
2243                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2244                                                 esc_path($from->{'file'}[$i]));
2245                         } else {
2246                                 $line = '--- /dev/null';
2247                         }
2248                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2249                 }
2250         }
2251
2252         $line = $to_line;
2253         #assert($line =~ m/^\+\+\+/) if DEBUG;
2254         # no extra formatting for "^+++ /dev/null"
2255         if ($line =~ m!^\+\+\+ "?b/!) {
2256                 if ($to->{'href'}) {
2257                         $line = '+++ b/' .
2258                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2259                                         esc_path($to->{'file'}));
2260                 } else {
2261                         $line = '+++ b/' .
2262                                 esc_path($to->{'file'});
2263                 }
2264         }
2265         $result .= qq!<div class="diff to_file">$line</div>\n!;
2266
2267         return $result;
2268 }
2269
2270 # create note for patch simplified by combined diff
2271 sub format_diff_cc_simplified {
2272         my ($diffinfo, @parents) = @_;
2273         my $result = '';
2274
2275         $result .= "<div class=\"diff header\">" .
2276                    "diff --cc ";
2277         if (!is_deleted($diffinfo)) {
2278                 $result .= $cgi->a({-href => href(action=>"blob",
2279                                                   hash_base=>$hash,
2280                                                   hash=>$diffinfo->{'to_id'},
2281                                                   file_name=>$diffinfo->{'to_file'}),
2282                                     -class => "path"},
2283                                    esc_path($diffinfo->{'to_file'}));
2284         } else {
2285                 $result .= esc_path($diffinfo->{'to_file'});
2286         }
2287         $result .= "</div>\n" . # class="diff header"
2288                    "<div class=\"diff nodifferences\">" .
2289                    "Simple merge" .
2290                    "</div>\n"; # class="diff nodifferences"
2291
2292         return $result;
2293 }
2294
2295 # format patch (diff) line (not to be used for diff headers)
2296 sub format_diff_line {
2297         my $line = shift;
2298         my ($from, $to) = @_;
2299         my $diff_class = "";
2300
2301         chomp $line;
2302
2303         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2304                 # combined diff
2305                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2306                 if ($line =~ m/^\@{3}/) {
2307                         $diff_class = " chunk_header";
2308                 } elsif ($line =~ m/^\\/) {
2309                         $diff_class = " incomplete";
2310                 } elsif ($prefix =~ tr/+/+/) {
2311                         $diff_class = " add";
2312                 } elsif ($prefix =~ tr/-/-/) {
2313                         $diff_class = " rem";
2314                 }
2315         } else {
2316                 # assume ordinary diff
2317                 my $char = substr($line, 0, 1);
2318                 if ($char eq '+') {
2319                         $diff_class = " add";
2320                 } elsif ($char eq '-') {
2321                         $diff_class = " rem";
2322                 } elsif ($char eq '@') {
2323                         $diff_class = " chunk_header";
2324                 } elsif ($char eq "\\") {
2325                         $diff_class = " incomplete";
2326                 }
2327         }
2328         $line = untabify($line);
2329         if ($from && $to && $line =~ m/^\@{2} /) {
2330                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2331                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2332
2333                 $from_lines = 0 unless defined $from_lines;
2334                 $to_lines   = 0 unless defined $to_lines;
2335
2336                 if ($from->{'href'}) {
2337                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2338                                              -class=>"list"}, $from_text);
2339                 }
2340                 if ($to->{'href'}) {
2341                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2342                                              -class=>"list"}, $to_text);
2343                 }
2344                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2345                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2346                 return "<div class=\"diff$diff_class\">$line</div>\n";
2347         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2348                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2349                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2350
2351                 @from_text = split(' ', $ranges);
2352                 for (my $i = 0; $i < @from_text; ++$i) {
2353                         ($from_start[$i], $from_nlines[$i]) =
2354                                 (split(',', substr($from_text[$i], 1)), 0);
2355                 }
2356
2357                 $to_text   = pop @from_text;
2358                 $to_start  = pop @from_start;
2359                 $to_nlines = pop @from_nlines;
2360
2361                 $line = "<span class=\"chunk_info\">$prefix ";
2362                 for (my $i = 0; $i < @from_text; ++$i) {
2363                         if ($from->{'href'}[$i]) {
2364                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2365                                                   -class=>"list"}, $from_text[$i]);
2366                         } else {
2367                                 $line .= $from_text[$i];
2368                         }
2369                         $line .= " ";
2370                 }
2371                 if ($to->{'href'}) {
2372                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2373                                           -class=>"list"}, $to_text);
2374                 } else {
2375                         $line .= $to_text;
2376                 }
2377                 $line .= " $prefix</span>" .
2378                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2379                 return "<div class=\"diff$diff_class\">$line</div>\n";
2380         }
2381         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2382 }
2383
2384 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2385 # linked.  Pass the hash of the tree/commit to snapshot.
2386 sub format_snapshot_links {
2387         my ($hash) = @_;
2388         my $num_fmts = @snapshot_fmts;
2389         if ($num_fmts > 1) {
2390                 # A parenthesized list of links bearing format names.
2391                 # e.g. "snapshot (_tar.gz_ _zip_)"
2392                 return "snapshot (" . join(' ', map
2393                         $cgi->a({
2394                                 -href => href(
2395                                         action=>"snapshot",
2396                                         hash=>$hash,
2397                                         snapshot_format=>$_
2398                                 )
2399                         }, $known_snapshot_formats{$_}{'display'})
2400                 , @snapshot_fmts) . ")";
2401         } elsif ($num_fmts == 1) {
2402                 # A single "snapshot" link whose tooltip bears the format name.
2403                 # i.e. "_snapshot_"
2404                 my ($fmt) = @snapshot_fmts;
2405                 return
2406                         $cgi->a({
2407                                 -href => href(
2408                                         action=>"snapshot",
2409                                         hash=>$hash,
2410                                         snapshot_format=>$fmt
2411                                 ),
2412                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2413                         }, "snapshot");
2414         } else { # $num_fmts == 0
2415                 return undef;
2416         }
2417 }
2418
2419 ## ......................................................................
2420 ## functions returning values to be passed, perhaps after some
2421 ## transformation, to other functions; e.g. returning arguments to href()
2422
2423 # returns hash to be passed to href to generate gitweb URL
2424 # in -title key it returns description of link
2425 sub get_feed_info {
2426         my $format = shift || 'Atom';
2427         my %res = (action => lc($format));
2428
2429         # feed links are possible only for project views
2430         return unless (defined $project);
2431         # some views should link to OPML, or to generic project feed,
2432         # or don't have specific feed yet (so they should use generic)
2433         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2434
2435         my $branch;
2436         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2437         # from tag links; this also makes possible to detect branch links
2438         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2439             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2440                 $branch = $1;
2441         }
2442         # find log type for feed description (title)
2443         my $type = 'log';
2444         if (defined $file_name) {
2445                 $type  = "history of $file_name";
2446                 $type .= "/" if ($action eq 'tree');
2447                 $type .= " on '$branch'" if (defined $branch);
2448         } else {
2449                 $type = "log of $branch" if (defined $branch);
2450         }
2451
2452         $res{-title} = $type;
2453         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2454         $res{'file_name'} = $file_name;
2455
2456         return %res;
2457 }
2458
2459 ## ----------------------------------------------------------------------
2460 ## git utility subroutines, invoking git commands
2461
2462 # returns path to the core git executable and the --git-dir parameter as list
2463 sub git_cmd {
2464         $number_of_git_cmds++;
2465         return $GIT, '--git-dir='.$git_dir;
2466 }
2467
2468 # quote the given arguments for passing them to the shell
2469 # quote_command("command", "arg 1", "arg with ' and ! characters")
2470 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2471 # Try to avoid using this function wherever possible.
2472 sub quote_command {
2473         return join(' ',
2474                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2475 }
2476
2477 # get HEAD ref of given project as hash
2478 sub git_get_head_hash {
2479         return git_get_full_hash(shift, 'HEAD');
2480 }
2481
2482 sub git_get_full_hash {
2483         return git_get_hash(@_);
2484 }
2485
2486 sub git_get_short_hash {
2487         return git_get_hash(@_, '--short=7');
2488 }
2489
2490 sub git_get_hash {
2491         my ($project, $hash, @options) = @_;
2492         my $o_git_dir = $git_dir;
2493         my $retval = undef;
2494         $git_dir = "$projectroot/$project";
2495         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2496             '--verify', '-q', @options, $hash) {
2497                 $retval = <$fd>;
2498                 chomp $retval if defined $retval;
2499                 close $fd;
2500         }
2501         if (defined $o_git_dir) {
2502                 $git_dir = $o_git_dir;
2503         }
2504         return $retval;
2505 }
2506
2507 # get type of given object
2508 sub git_get_type {
2509         my $hash = shift;
2510
2511         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2512         my $type = <$fd>;
2513         close $fd or return;
2514         chomp $type;
2515         return $type;
2516 }
2517
2518 # repository configuration
2519 our $config_file = '';
2520 our %config;
2521
2522 # store multiple values for single key as anonymous array reference
2523 # single values stored directly in the hash, not as [ <value> ]
2524 sub hash_set_multi {
2525         my ($hash, $key, $value) = @_;
2526
2527         if (!exists $hash->{$key}) {
2528                 $hash->{$key} = $value;
2529         } elsif (!ref $hash->{$key}) {
2530                 $hash->{$key} = [ $hash->{$key}, $value ];
2531         } else {
2532                 push @{$hash->{$key}}, $value;
2533         }
2534 }
2535
2536 # return hash of git project configuration
2537 # optionally limited to some section, e.g. 'gitweb'
2538 sub git_parse_project_config {
2539         my $section_regexp = shift;
2540         my %config;
2541
2542         local $/ = "\0";
2543
2544         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2545                 or return;
2546
2547         while (my $keyval = <$fh>) {
2548                 chomp $keyval;
2549                 my ($key, $value) = split(/\n/, $keyval, 2);
2550
2551                 hash_set_multi(\%config, $key, $value)
2552                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2553         }
2554         close $fh;
2555
2556         return %config;
2557 }
2558
2559 # convert config value to boolean: 'true' or 'false'
2560 # no value, number > 0, 'true' and 'yes' values are true
2561 # rest of values are treated as false (never as error)
2562 sub config_to_bool {
2563         my $val = shift;
2564
2565         return 1 if !defined $val;             # section.key
2566
2567         # strip leading and trailing whitespace
2568         $val =~ s/^\s+//;
2569         $val =~ s/\s+$//;
2570
2571         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2572                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2573 }
2574
2575 # convert config value to simple decimal number
2576 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2577 # to be multiplied by 1024, 1048576, or 1073741824
2578 sub config_to_int {
2579         my $val = shift;
2580
2581         # strip leading and trailing whitespace
2582         $val =~ s/^\s+//;
2583         $val =~ s/\s+$//;
2584
2585         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2586                 $unit = lc($unit);
2587                 # unknown unit is treated as 1
2588                 return $num * ($unit eq 'g' ? 1073741824 :
2589                                $unit eq 'm' ?    1048576 :
2590                                $unit eq 'k' ?       1024 : 1);
2591         }
2592         return $val;
2593 }
2594
2595 # convert config value to array reference, if needed
2596 sub config_to_multi {
2597         my $val = shift;
2598
2599         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2600 }
2601
2602 sub git_get_project_config {
2603         my ($key, $type) = @_;
2604
2605         return unless defined $git_dir;
2606
2607         # key sanity check
2608         return unless ($key);
2609         $key =~ s/^gitweb\.//;
2610         return if ($key =~ m/\W/);
2611
2612         # type sanity check
2613         if (defined $type) {
2614                 $type =~ s/^--//;
2615                 $type = undef
2616                         unless ($type eq 'bool' || $type eq 'int');
2617         }
2618
2619         # get config
2620         if (!defined $config_file ||
2621             $config_file ne "$git_dir/config") {
2622                 %config = git_parse_project_config('gitweb');
2623                 $config_file = "$git_dir/config";
2624         }
2625
2626         # check if config variable (key) exists
2627         return unless exists $config{"gitweb.$key"};
2628
2629         # ensure given type
2630         if (!defined $type) {
2631                 return $config{"gitweb.$key"};
2632         } elsif ($type eq 'bool') {
2633                 # backward compatibility: 'git config --bool' returns true/false
2634                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2635         } elsif ($type eq 'int') {
2636                 return config_to_int($config{"gitweb.$key"});
2637         }
2638         return $config{"gitweb.$key"};
2639 }
2640
2641 # get hash of given path at given ref
2642 sub git_get_hash_by_path {
2643         my $base = shift;
2644         my $path = shift || return undef;
2645         my $type = shift;
2646
2647         $path =~ s,/+$,,;
2648
2649         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2650                 or die_error(500, "Open git-ls-tree failed");
2651         my $line = <$fd>;
2652         close $fd or return undef;
2653
2654         if (!defined $line) {
2655                 # there is no tree or hash given by $path at $base
2656                 return undef;
2657         }
2658
2659         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2660         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2661         if (defined $type && $type ne $2) {
2662                 # type doesn't match
2663                 return undef;
2664         }
2665         return $3;
2666 }
2667
2668 # get path of entry with given hash at given tree-ish (ref)
2669 # used to get 'from' filename for combined diff (merge commit) for renames
2670 sub git_get_path_by_hash {
2671         my $base = shift || return;
2672         my $hash = shift || return;
2673
2674         local $/ = "\0";
2675
2676         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2677                 or return undef;
2678         while (my $line = <$fd>) {
2679                 chomp $line;
2680
2681                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2682                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2683                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2684                         close $fd;
2685                         return $1;
2686                 }
2687         }
2688         close $fd;
2689         return undef;
2690 }
2691
2692 ## ......................................................................
2693 ## git utility functions, directly accessing git repository
2694
2695 sub git_get_project_description {
2696         my $path = shift;
2697
2698         $git_dir = "$projectroot/$path";
2699         open my $fd, '<', "$git_dir/description"
2700                 or return git_get_project_config('description');
2701         my $descr = <$fd>;
2702         close $fd;
2703         if (defined $descr) {
2704                 chomp $descr;
2705         }
2706         return $descr;
2707 }
2708
2709 sub git_get_project_ctags {
2710         my $path = shift;
2711         my $ctags = {};
2712
2713         $git_dir = "$projectroot/$path";
2714         opendir my $dh, "$git_dir/ctags"
2715                 or return $ctags;
2716         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2717                 open my $ct, '<', $_ or next;
2718                 my $val = <$ct>;
2719                 chomp $val;
2720                 close $ct;
2721                 my $ctag = $_; $ctag =~ s#.*/##;
2722                 $ctags->{$ctag} = $val;
2723         }
2724         closedir $dh;
2725         $ctags;
2726 }
2727
2728 sub git_populate_project_tagcloud {
2729         my $ctags = shift;
2730
2731         # First, merge different-cased tags; tags vote on casing
2732         my %ctags_lc;
2733         foreach (keys %$ctags) {
2734                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2735                 if (not $ctags_lc{lc $_}->{topcount}
2736                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2737                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2738                         $ctags_lc{lc $_}->{topname} = $_;
2739                 }
2740         }
2741
2742         my $cloud;
2743         if (eval { require HTML::TagCloud; 1; }) {
2744                 $cloud = HTML::TagCloud->new;
2745                 foreach (sort keys %ctags_lc) {
2746                         # Pad the title with spaces so that the cloud looks
2747                         # less crammed.
2748                         my $title = $ctags_lc{$_}->{topname};
2749                         $title =~ s/ /&nbsp;/g;
2750                         $title =~ s/^/&nbsp;/g;
2751                         $title =~ s/$/&nbsp;/g;
2752                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2753                 }
2754         } else {
2755                 $cloud = \%ctags_lc;
2756         }
2757         $cloud;
2758 }
2759
2760 sub git_show_project_tagcloud {
2761         my ($cloud, $count) = @_;
2762         print STDERR ref($cloud)."..\n";
2763         if (ref $cloud eq 'HTML::TagCloud') {
2764                 return $cloud->html_and_css($count);
2765         } else {
2766                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2767                 return '<p align="center">' . join (', ', map {
2768                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2769                 } splice(@tags, 0, $count)) . '</p>';
2770         }
2771 }
2772
2773 sub git_get_project_url_list {
2774         my $path = shift;
2775
2776         $git_dir = "$projectroot/$path";
2777         open my $fd, '<', "$git_dir/cloneurl"
2778                 or return wantarray ?
2779                 @{ config_to_multi(git_get_project_config('url')) } :
2780                    config_to_multi(git_get_project_config('url'));
2781         my @git_project_url_list = map { chomp; $_ } <$fd>;
2782         close $fd;
2783
2784         return wantarray ? @git_project_url_list : \@git_project_url_list;
2785 }
2786
2787 sub git_get_projects_list {
2788         my ($filter) = @_;
2789         my @list;
2790
2791         $filter ||= '';
2792         $filter =~ s/\.git$//;
2793
2794         my $check_forks = gitweb_check_feature('forks');
2795
2796         if (-d $projects_list) {
2797                 # search in directory
2798                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2799                 # remove the trailing "/"
2800                 $dir =~ s!/+$!!;
2801                 my $pfxlen = length("$dir");
2802                 my $pfxdepth = ($dir =~ tr!/!!);
2803
2804                 File::Find::find({
2805                         follow_fast => 1, # follow symbolic links
2806                         follow_skip => 2, # ignore duplicates
2807                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2808                         wanted => sub {
2809                                 # global variables
2810                                 our $project_maxdepth;
2811                                 our $projectroot;
2812                                 # skip project-list toplevel, if we get it.
2813                                 return if (m!^[/.]$!);
2814                                 # only directories can be git repositories
2815                                 return unless (-d $_);
2816                                 # don't traverse too deep (Find is super slow on os x)
2817                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2818                                         $File::Find::prune = 1;
2819                                         return;
2820                                 }
2821
2822                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2823                                 # we check related file in $projectroot
2824                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2825                                 if (check_export_ok("$projectroot/$path")) {
2826                                         push @list, { path => $path };
2827                                         $File::Find::prune = 1;
2828                                 }
2829                         },
2830                 }, "$dir");
2831
2832         } elsif (-f $projects_list) {
2833                 # read from file(url-encoded):
2834                 # 'git%2Fgit.git Linus+Torvalds'
2835                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2836                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2837                 my %paths;
2838                 open my $fd, '<', $projects_list or return;
2839         PROJECT:
2840                 while (my $line = <$fd>) {
2841                         chomp $line;
2842                         my ($path, $owner) = split ' ', $line;
2843                         $path = unescape($path);
2844                         $owner = unescape($owner);
2845                         if (!defined $path) {
2846                                 next;
2847                         }
2848                         if ($filter ne '') {
2849                                 # looking for forks;
2850                                 my $pfx = substr($path, 0, length($filter));
2851                                 if ($pfx ne $filter) {
2852                                         next PROJECT;
2853                                 }
2854                                 my $sfx = substr($path, length($filter));
2855                                 if ($sfx !~ /^\/.*\.git$/) {
2856                                         next PROJECT;
2857                                 }
2858                         } elsif ($check_forks) {
2859                         PATH:
2860                                 foreach my $filter (keys %paths) {
2861                                         # looking for forks;
2862                                         my $pfx = substr($path, 0, length($filter));
2863                                         if ($pfx ne $filter) {
2864                                                 next PATH;
2865                                         }
2866                                         my $sfx = substr($path, length($filter));
2867                                         if ($sfx !~ /^\/.*\.git$/) {
2868                                                 next PATH;
2869                                         }
2870                                         # is a fork, don't include it in
2871                                         # the list
2872                                         next PROJECT;
2873                                 }
2874                         }
2875                         if (check_export_ok("$projectroot/$path")) {
2876                                 my $pr = {
2877                                         path => $path,
2878                                         owner => to_utf8($owner),
2879                                 };
2880                                 push @list, $pr;
2881                                 (my $forks_path = $path) =~ s/\.git$//;
2882                                 $paths{$forks_path}++;
2883                         }
2884                 }
2885                 close $fd;
2886         }
2887         return @list;
2888 }
2889
2890 our $gitweb_project_owner = undef;
2891 sub git_get_project_list_from_file {
2892
2893         return if (defined $gitweb_project_owner);
2894
2895         $gitweb_project_owner = {};
2896         # read from file (url-encoded):
2897         # 'git%2Fgit.git Linus+Torvalds'
2898         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2899         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2900         if (-f $projects_list) {
2901                 open(my $fd, '<', $projects_list);
2902                 while (my $line = <$fd>) {
2903                         chomp $line;
2904                         my ($pr, $ow) = split ' ', $line;
2905                         $pr = unescape($pr);
2906                         $ow = unescape($ow);
2907                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2908                 }
2909                 close $fd;
2910         }
2911 }
2912
2913 sub git_get_project_owner {
2914         my $project = shift;
2915         my $owner;
2916
2917         return undef unless $project;
2918         $git_dir = "$projectroot/$project";
2919
2920         if (!defined $gitweb_project_owner) {
2921                 git_get_project_list_from_file();
2922         }
2923
2924         if (exists $gitweb_project_owner->{$project}) {
2925                 $owner = $gitweb_project_owner->{$project};
2926         }
2927         if (!defined $owner){
2928                 $owner = git_get_project_config('owner');
2929         }
2930         if (!defined $owner) {
2931                 $owner = get_file_owner("$git_dir");
2932         }
2933
2934         return $owner;
2935 }
2936
2937 sub git_get_last_activity {
2938         my ($path) = @_;
2939         my $fd;
2940
2941         $git_dir = "$projectroot/$path";
2942         open($fd, "-|", git_cmd(), 'for-each-ref',
2943              '--format=%(committer)',
2944              '--sort=-committerdate',
2945              '--count=1',
2946              'refs/heads') or return;
2947         my $most_recent = <$fd>;
2948         close $fd or return;
2949         if (defined $most_recent &&
2950             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2951                 my $timestamp = $1;
2952                 my $age = time - $timestamp;
2953                 return ($age, age_string($age));
2954         }
2955         return (undef, undef);
2956 }
2957
2958 sub git_get_references {
2959         my $type = shift || "";
2960         my %refs;
2961         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2962         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2963         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2964                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2965                 or return;
2966
2967         while (my $line = <$fd>) {
2968                 chomp $line;
2969                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2970                         if (defined $refs{$1}) {
2971                                 push @{$refs{$1}}, $2;
2972                         } else {
2973                                 $refs{$1} = [ $2 ];
2974                         }
2975                 }
2976         }
2977         close $fd or return;
2978         return \%refs;
2979 }
2980
2981 sub git_get_rev_name_tags {
2982         my $hash = shift || return undef;
2983
2984         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2985                 or return;
2986         my $name_rev = <$fd>;
2987         close $fd;
2988
2989         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2990                 return $1;
2991         } else {
2992                 # catches also '$hash undefined' output
2993                 return undef;
2994         }
2995 }
2996
2997 ## ----------------------------------------------------------------------
2998 ## parse to hash functions
2999
3000 sub parse_date {
3001         my $epoch = shift;
3002         my $tz = shift || "-0000";
3003
3004         my %date;
3005         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3006         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3007         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3008         $date{'hour'} = $hour;
3009         $date{'minute'} = $min;
3010         $date{'mday'} = $mday;
3011         $date{'day'} = $days[$wday];
3012         $date{'month'} = $months[$mon];
3013         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3014                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3015         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3016                              $mday, $months[$mon], $hour ,$min;
3017         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3018                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3019
3020         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
3021         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
3022         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3023         $date{'hour_local'} = $hour;
3024         $date{'minute_local'} = $min;
3025         $date{'tz_local'} = $tz;
3026         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3027                                   1900+$year, $mon+1, $mday,
3028                                   $hour, $min, $sec, $tz);
3029         return %date;
3030 }
3031
3032 sub parse_tag {
3033         my $tag_id = shift;
3034         my %tag;
3035         my @comment;
3036
3037         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3038         $tag{'id'} = $tag_id;
3039         while (my $line = <$fd>) {
3040                 chomp $line;
3041                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3042                         $tag{'object'} = $1;
3043                 } elsif ($line =~ m/^type (.+)$/) {
3044                         $tag{'type'} = $1;
3045                 } elsif ($line =~ m/^tag (.+)$/) {
3046                         $tag{'name'} = $1;
3047                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3048                         $tag{'author'} = $1;
3049                         $tag{'author_epoch'} = $2;
3050                         $tag{'author_tz'} = $3;
3051                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3052                                 $tag{'author_name'}  = $1;
3053                                 $tag{'author_email'} = $2;
3054                         } else {
3055                                 $tag{'author_name'} = $tag{'author'};
3056                         }
3057                 } elsif ($line =~ m/--BEGIN/) {
3058                         push @comment, $line;
3059                         last;
3060                 } elsif ($line eq "") {
3061                         last;
3062                 }
3063         }
3064         push @comment, <$fd>;
3065         $tag{'comment'} = \@comment;
3066         close $fd or return;
3067         if (!defined $tag{'name'}) {
3068                 return
3069         };
3070         return %tag
3071 }
3072
3073 sub parse_commit_text {
3074         my ($commit_text, $withparents) = @_;
3075         my @commit_lines = split '\n', $commit_text;
3076         my %co;
3077
3078         pop @commit_lines; # Remove '\0'
3079
3080         if (! @commit_lines) {
3081                 return;
3082         }
3083
3084         my $header = shift @commit_lines;
3085         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3086                 return;
3087         }
3088         ($co{'id'}, my @parents) = split ' ', $header;
3089         while (my $line = shift @commit_lines) {
3090                 last if $line eq "\n";
3091                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3092                         $co{'tree'} = $1;
3093                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3094                         push @parents, $1;
3095                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3096                         $co{'author'} = to_utf8($1);
3097                         $co{'author_epoch'} = $2;
3098                         $co{'author_tz'} = $3;
3099                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3100                                 $co{'author_name'}  = $1;
3101                                 $co{'author_email'} = $2;
3102                         } else {
3103                                 $co{'author_name'} = $co{'author'};
3104                         }
3105                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3106                         $co{'committer'} = to_utf8($1);
3107                         $co{'committer_epoch'} = $2;
3108                         $co{'committer_tz'} = $3;
3109                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3110                                 $co{'committer_name'}  = $1;
3111                                 $co{'committer_email'} = $2;
3112                         } else {
3113                                 $co{'committer_name'} = $co{'committer'};
3114                         }
3115                 }
3116         }
3117         if (!defined $co{'tree'}) {
3118                 return;
3119         };
3120         $co{'parents'} = \@parents;
3121         $co{'parent'} = $parents[0];
3122
3123         foreach my $title (@commit_lines) {
3124                 $title =~ s/^    //;
3125                 if ($title ne "") {
3126                         $co{'title'} = chop_str($title, 80, 5);
3127                         # remove leading stuff of merges to make the interesting part visible
3128                         if (length($title) > 50) {
3129                                 $title =~ s/^Automatic //;
3130                                 $title =~ s/^merge (of|with) /Merge ... /i;
3131                                 if (length($title) > 50) {
3132                                         $title =~ s/(http|rsync):\/\///;
3133                                 }
3134                                 if (length($title) > 50) {
3135                                         $title =~ s/(master|www|rsync)\.//;
3136                                 }
3137                                 if (length($title) > 50) {
3138                                         $title =~ s/kernel.org:?//;
3139                                 }
3140                                 if (length($title) > 50) {
3141                                         $title =~ s/\/pub\/scm//;
3142                                 }
3143                         }
3144                         $co{'title_short'} = chop_str($title, 50, 5);
3145                         last;
3146                 }
3147         }
3148         if (! defined $co{'title'} || $co{'title'} eq "") {
3149                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3150         }
3151         # remove added spaces
3152         foreach my $line (@commit_lines) {
3153                 $line =~ s/^    //;
3154         }
3155         $co{'comment'} = \@commit_lines;
3156
3157         my $age = time - $co{'committer_epoch'};
3158         $co{'age'} = $age;
3159         $co{'age_string'} = age_string($age);
3160         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3161         if ($age > 60*60*24*7*2) {
3162                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3163                 $co{'age_string_age'} = $co{'age_string'};
3164         } else {
3165                 $co{'age_string_date'} = $co{'age_string'};
3166                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3167         }
3168         return %co;
3169 }
3170
3171 sub parse_commit {
3172         my ($commit_id) = @_;
3173         my %co;
3174
3175         local $/ = "\0";
3176
3177         open my $fd, "-|", git_cmd(), "rev-list",
3178                 "--parents",
3179                 "--header",
3180                 "--max-count=1",
3181                 $commit_id,
3182                 "--",
3183                 or die_error(500, "Open git-rev-list failed");
3184         %co = parse_commit_text(<$fd>, 1);
3185         close $fd;
3186
3187         return %co;
3188 }
3189
3190 sub parse_commits {
3191         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3192         my @cos;
3193
3194         $maxcount ||= 1;
3195         $skip ||= 0;
3196
3197         local $/ = "\0";
3198
3199         open my $fd, "-|", git_cmd(), "rev-list",
3200                 "--header",
3201                 @args,
3202                 ("--max-count=" . $maxcount),
3203                 ("--skip=" . $skip),
3204                 @extra_options,
3205                 $commit_id,
3206                 "--",
3207                 ($filename ? ($filename) : ())
3208                 or die_error(500, "Open git-rev-list failed");
3209         while (my $line = <$fd>) {
3210                 my %co = parse_commit_text($line);
3211                 push @cos, \%co;
3212         }
3213         close $fd;
3214
3215         return wantarray ? @cos : \@cos;
3216 }
3217
3218 # parse line of git-diff-tree "raw" output
3219 sub parse_difftree_raw_line {
3220         my $line = shift;
3221         my %res;
3222
3223         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3224         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3225         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3226                 $res{'from_mode'} = $1;
3227                 $res{'to_mode'} = $2;
3228                 $res{'from_id'} = $3;
3229                 $res{'to_id'} = $4;
3230                 $res{'status'} = $5;
3231                 $res{'similarity'} = $6;
3232                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3233                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3234                 } else {
3235                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3236                 }
3237         }
3238         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3239         # combined diff (for merge commit)
3240         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3241                 $res{'nparents'}  = length($1);
3242                 $res{'from_mode'} = [ split(' ', $2) ];
3243                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3244                 $res{'from_id'} = [ split(' ', $3) ];
3245                 $res{'to_id'} = pop @{$res{'from_id'}};
3246                 $res{'status'} = [ split('', $4) ];
3247                 $res{'to_file'} = unquote($5);
3248         }
3249         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3250         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3251                 $res{'commit'} = $1;
3252         }
3253
3254         return wantarray ? %res : \%res;
3255 }
3256
3257 # wrapper: return parsed line of git-diff-tree "raw" output
3258 # (the argument might be raw line, or parsed info)
3259 sub parsed_difftree_line {
3260         my $line_or_ref = shift;
3261
3262         if (ref($line_or_ref) eq "HASH") {
3263                 # pre-parsed (or generated by hand)
3264                 return $line_or_ref;
3265         } else {
3266                 return parse_difftree_raw_line($line_or_ref);
3267         }
3268 }
3269
3270 # parse line of git-ls-tree output
3271 sub parse_ls_tree_line {
3272         my $line = shift;
3273         my %opts = @_;
3274         my %res;
3275
3276         if ($opts{'-l'}) {
3277                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3278                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3279
3280                 $res{'mode'} = $1;
3281                 $res{'type'} = $2;
3282                 $res{'hash'} = $3;
3283                 $res{'size'} = $4;
3284                 if ($opts{'-z'}) {
3285                         $res{'name'} = $5;
3286                 } else {
3287                         $res{'name'} = unquote($5);
3288                 }
3289         } else {
3290                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3291                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3292
3293                 $res{'mode'} = $1;
3294                 $res{'type'} = $2;
3295                 $res{'hash'} = $3;
3296                 if ($opts{'-z'}) {
3297                         $res{'name'} = $4;
3298                 } else {
3299                         $res{'name'} = unquote($4);
3300                 }
3301         }
3302
3303         return wantarray ? %res : \%res;
3304 }
3305
3306 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3307 sub parse_from_to_diffinfo {
3308         my ($diffinfo, $from, $to, @parents) = @_;
3309
3310         if ($diffinfo->{'nparents'}) {
3311                 # combined diff
3312                 $from->{'file'} = [];
3313                 $from->{'href'} = [];
3314                 fill_from_file_info($diffinfo, @parents)
3315                         unless exists $diffinfo->{'from_file'};
3316                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3317                         $from->{'file'}[$i] =
3318                                 defined $diffinfo->{'from_file'}[$i] ?
3319                                         $diffinfo->{'from_file'}[$i] :
3320                                         $diffinfo->{'to_file'};
3321                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3322                                 $from->{'href'}[$i] = href(action=>"blob",
3323                                                            hash_base=>$parents[$i],
3324                                                            hash=>$diffinfo->{'from_id'}[$i],
3325                                                            file_name=>$from->{'file'}[$i]);
3326                         } else {
3327                                 $from->{'href'}[$i] = undef;
3328                         }
3329                 }
3330         } else {
3331                 # ordinary (not combined) diff
3332                 $from->{'file'} = $diffinfo->{'from_file'};
3333                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3334                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3335                                                hash=>$diffinfo->{'from_id'},
3336                                                file_name=>$from->{'file'});
3337                 } else {
3338                         delete $from->{'href'};
3339                 }
3340         }
3341
3342         $to->{'file'} = $diffinfo->{'to_file'};
3343         if (!is_deleted($diffinfo)) { # file exists in result
3344                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3345                                      hash=>$diffinfo->{'to_id'},
3346                                      file_name=>$to->{'file'});
3347         } else {
3348                 delete $to->{'href'};
3349         }
3350 }
3351
3352 ## ......................................................................
3353 ## parse to array of hashes functions
3354
3355 sub git_get_heads_list {
3356         my $limit = shift;
3357         my @headslist;
3358
3359         open my $fd, '-|', git_cmd(), 'for-each-ref',
3360                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3361                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3362                 'refs/heads'
3363                 or return;
3364         while (my $line = <$fd>) {
3365                 my %ref_item;
3366
3367                 chomp $line;
3368                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3369                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3370                 my ($committer, $epoch, $tz) =
3371                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3372                 $ref_item{'fullname'}  = $name;
3373                 $name =~ s!^refs/heads/!!;
3374
3375                 $ref_item{'name'}  = $name;
3376                 $ref_item{'id'}    = $hash;
3377                 $ref_item{'title'} = $title || '(no commit message)';
3378                 $ref_item{'epoch'} = $epoch;
3379                 if ($epoch) {
3380                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3381                 } else {
3382                         $ref_item{'age'} = "unknown";
3383                 }
3384
3385                 push @headslist, \%ref_item;
3386         }
3387         close $fd;
3388
3389         return wantarray ? @headslist : \@headslist;
3390 }
3391
3392 sub git_get_tags_list {
3393         my $limit = shift;
3394         my @tagslist;
3395
3396         open my $fd, '-|', git_cmd(), 'for-each-ref',
3397                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3398                 '--format=%(objectname) %(objecttype) %(refname) '.
3399                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3400                 'refs/tags'
3401                 or return;
3402         while (my $line = <$fd>) {
3403                 my %ref_item;
3404
3405                 chomp $line;
3406                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3407                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3408                 my ($creator, $epoch, $tz) =
3409                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3410                 $ref_item{'fullname'} = $name;
3411                 $name =~ s!^refs/tags/!!;
3412
3413                 $ref_item{'type'} = $type;
3414                 $ref_item{'id'} = $id;
3415                 $ref_item{'name'} = $name;
3416                 if ($type eq "tag") {
3417                         $ref_item{'subject'} = $title;
3418                         $ref_item{'reftype'} = $reftype;
3419                         $ref_item{'refid'}   = $refid;
3420                 } else {
3421                         $ref_item{'reftype'} = $type;
3422                         $ref_item{'refid'}   = $id;
3423                 }
3424
3425                 if ($type eq "tag" || $type eq "commit") {
3426                         $ref_item{'epoch'} = $epoch;
3427                         if ($epoch) {
3428                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3429                         } else {
3430                                 $ref_item{'age'} = "unknown";
3431                         }
3432                 }
3433
3434                 push @tagslist, \%ref_item;
3435         }
3436         close $fd;
3437
3438         return wantarray ? @tagslist : \@tagslist;
3439 }
3440
3441 ## ----------------------------------------------------------------------
3442 ## filesystem-related functions
3443
3444 sub get_file_owner {
3445         my $path = shift;
3446
3447         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3448         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3449         if (!defined $gcos) {
3450                 return undef;
3451         }
3452         my $owner = $gcos;
3453         $owner =~ s/[,;].*$//;
3454         return to_utf8($owner);
3455 }
3456
3457 # assume that file exists
3458 sub insert_file {
3459         my $filename = shift;
3460
3461         open my $fd, '<', $filename;
3462         print map { to_utf8($_) } <$fd>;
3463         close $fd;
3464 }
3465
3466 ## ......................................................................
3467 ## mimetype related functions
3468
3469 sub mimetype_guess_file {
3470         my $filename = shift;
3471         my $mimemap = shift;
3472         -r $mimemap or return undef;
3473
3474         my %mimemap;
3475         open(my $mh, '<', $mimemap) or return undef;
3476         while (<$mh>) {
3477                 next if m/^#/; # skip comments
3478                 my ($mimetype, $exts) = split(/\t+/);
3479                 if (defined $exts) {
3480                         my @exts = split(/\s+/, $exts);
3481                         foreach my $ext (@exts) {
3482                                 $mimemap{$ext} = $mimetype;
3483                         }
3484                 }
3485         }
3486         close($mh);
3487
3488         $filename =~ /\.([^.]*)$/;
3489         return $mimemap{$1};
3490 }
3491
3492 sub mimetype_guess {
3493         my $filename = shift;
3494         my $mime;
3495         $filename =~ /\./ or return undef;
3496
3497         if ($mimetypes_file) {
3498                 my $file = $mimetypes_file;
3499                 if ($file !~ m!^/!) { # if it is relative path
3500                         # it is relative to project
3501                         $file = "$projectroot/$project/$file";
3502                 }
3503                 $mime = mimetype_guess_file($filename, $file);
3504         }
3505         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3506         return $mime;
3507 }
3508
3509 sub blob_mimetype {
3510         my $fd = shift;
3511         my $filename = shift;
3512
3513         if ($filename) {
3514                 my $mime = mimetype_guess($filename);
3515                 $mime and return $mime;
3516         }
3517
3518         # just in case
3519         return $default_blob_plain_mimetype unless $fd;
3520
3521         if (-T $fd) {
3522                 return 'text/plain';
3523         } elsif (! $filename) {
3524                 return 'application/octet-stream';
3525         } elsif ($filename =~ m/\.png$/i) {
3526                 return 'image/png';
3527         } elsif ($filename =~ m/\.gif$/i) {
3528                 return 'image/gif';
3529         } elsif ($filename =~ m/\.jpe?g$/i) {
3530                 return 'image/jpeg';
3531         } else {
3532                 return 'application/octet-stream';
3533         }
3534 }
3535
3536 sub blob_contenttype {
3537         my ($fd, $file_name, $type) = @_;
3538
3539         $type ||= blob_mimetype($fd, $file_name);
3540         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3541                 $type .= "; charset=$default_text_plain_charset";
3542         }
3543
3544         return $type;
3545 }
3546
3547 # guess file syntax for syntax highlighting; return undef if no highlighting
3548 # the name of syntax can (in the future) depend on syntax highlighter used
3549 sub guess_file_syntax {
3550         my ($highlight, $mimetype, $file_name) = @_;
3551         return undef unless ($highlight && defined $file_name);
3552         my $basename = basename($file_name, '.in');
3553         return $highlight_basename{$basename}
3554                 if exists $highlight_basename{$basename};
3555
3556         $basename =~ /\.([^.]*)$/;
3557         my $ext = $1 or return undef;
3558         return $highlight_ext{$ext}
3559                 if exists $highlight_ext{$ext};
3560
3561         return undef;
3562 }
3563
3564 # run highlighter and return FD of its output,
3565 # or return original FD if no highlighting
3566 sub run_highlighter {
3567         my ($fd, $highlight, $syntax) = @_;
3568         return $fd unless ($highlight && defined $syntax);
3569
3570         close $fd
3571                 or die_error(404, "Reading blob failed");
3572         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3573                   quote_command($highlight_bin).
3574                   " --xhtml --fragment --syntax $syntax |"
3575                 or die_error(500, "Couldn't open file or run syntax highlighter");
3576         return $fd;
3577 }
3578
3579 ## ======================================================================
3580 ## functions printing HTML: header, footer, error page
3581
3582 sub get_page_title {
3583         my $title = to_utf8($site_name);
3584
3585         return $title unless (defined $project);
3586         $title .= " - " . to_utf8($project);
3587
3588         return $title unless (defined $action);
3589         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3590
3591         return $title unless (defined $file_name);
3592         $title .= " - " . esc_path($file_name);
3593         if ($action eq "tree" && $file_name !~ m|/$|) {
3594                 $title .= "/";
3595         }
3596
3597         return $title;
3598 }
3599
3600 # creates "Generating..." page when caching enabled and not in cache
3601 sub git_generating_data_html {
3602         my ($cache, $key, $lock_fh) = @_;
3603
3604         # whitelist of actions that should get "Generating..." page
3605         if (!action_outputs_html($action) ||
3606             browser_is_robot()) {
3607                 return;
3608         }
3609
3610         my $title = "[Generating...] " . get_page_title();
3611         # TODO: the following line of code duplicates the one
3612         # in git_header_html, and it should probably be refactored.
3613         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3614
3615         # Use the trick that 'refresh' HTTP header equivalent (set via http-equiv)
3616         # with timeout of 0 seconds would redirect as soon as page is finished.
3617         # It assumes that browser would display partially received page.
3618         # This "Generating..." redirect page should not be cached (externally).
3619         my %no_cache = (
3620                 # HTTP/1.0
3621                 -Pragma => 'no-cache',
3622                 # HTTP/1.1
3623                 -Cache_Control => join(', ', qw(private no-cache no-store must-revalidate
3624                                                 max-age=0 pre-check=0 post-check=0)),
3625         );
3626         print STDOUT $cgi->header(-type => 'text/html', -charset => 'utf-8',
3627                                   -status=> '200 OK', -expires => 'now',
3628                                   %no_cache);
3629         print STDOUT <<"EOF";
3630 <?xml version="1.0" encoding="utf-8"?>
3631 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
3632                       "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3633 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3634 <!-- git web interface version $version -->
3635 <!-- git core binaries version $git_version -->
3636 <head>
3637 <meta http-equiv="content-type" content="text/html; charset=utf-8" />
3638 <meta http-equiv="refresh" content="0" />
3639 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version" />
3640 <meta name="robots" content="noindex, nofollow" />
3641 <title>$title</title>
3642 </head>
3643 <body>
3644 EOF
3645
3646         local $| = 1; # autoflush
3647         print STDOUT 'Generating...';
3648
3649         my $total_time = 0;
3650         my $interval = $generating_options{'print_interval'} || 1;
3651         my $timeout  = $generating_options{'timeout'};
3652         my $alarm_handler = sub {
3653                 local $! = 1;
3654                 print STDOUT '.';
3655                 $total_time += $interval;
3656                 if ($total_time > $timeout) {
3657                         die "timeout\n";
3658                 }
3659         };
3660         eval {
3661                 local $SIG{ALRM} = $alarm_handler;
3662                 Time::HiRes::alarm($interval, $interval);
3663                 my $lock_acquired;
3664                 do {
3665                         # loop is needed here because SIGALRM (from 'alarm')
3666                         # can interrupt process of acquiring lock
3667                         $lock_acquired = flock($lock_fh, LOCK_SH); # blocking readers lock
3668                 } until ($lock_acquired);
3669                 alarm 0;
3670         };
3671         # It doesn't really matter if we got lock, or timed-out
3672         # but we should re-throw unknown (unexpected) errors
3673         die $@ if ($@ and $@ !~ /timeout/);
3674
3675         print STDOUT <<"EOF";
3676
3677 </body>
3678 </html>
3679 EOF
3680
3681         # after refresh web browser would reload page and send new request
3682         goto DONE_GITWEB;
3683         #exit 0;
3684         #return;
3685 }
3686
3687 sub git_header_html {
3688         my $status = shift || "200 OK";
3689         my $expires = shift;
3690         my %opts = @_;
3691
3692         my $title = get_page_title();
3693         my $content_type;
3694         # require explicit support from the UA if we are to send the page as
3695         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3696         # we have to do this because MSIE sometimes globs '*/*', pretending to
3697         # support xhtml+xml but choking when it gets what it asked for.
3698         # Disable content-type negotiation when caching (use mimetype good for all).
3699         if (!$caching_enabled &&
3700             defined $cgi->http('HTTP_ACCEPT') &&
3701             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3702             $cgi->Accept('application/xhtml+xml') != 0) {
3703                 $content_type = 'application/xhtml+xml';
3704         } else {
3705                 $content_type = 'text/html';
3706         }
3707         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3708                            -status=> $status, -expires => $expires)
3709                 unless ($opts{'-no_http_header'});
3710         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3711         print <<EOF;
3712 <?xml version="1.0" encoding="utf-8"?>
3713 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3714 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3715 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3716 <!-- git core binaries version $git_version -->
3717 <head>
3718 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3719 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3720 <meta name="robots" content="index, nofollow"/>
3721 <title>$title</title>
3722 EOF
3723         # the stylesheet, favicon etc urls won't work correctly with path_info
3724         # unless we set the appropriate base URL
3725         # if caching is enabled we can get it from cache for path_info when it
3726         # is generated without path_info
3727         if ($ENV{'PATH_INFO'} || $caching_enabled) {
3728                 print "<base href=\"".esc_url($base_url)."\" />\n";
3729         }
3730         # print out each stylesheet that exist, providing backwards capability
3731         # for those people who defined $stylesheet in a config file
3732         if (defined $stylesheet) {
3733                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3734         } else {
3735                 foreach my $stylesheet (@stylesheets) {
3736                         next unless $stylesheet;
3737                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3738                 }
3739         }
3740         if (defined $project) {
3741                 my %href_params = get_feed_info();
3742                 if (!exists $href_params{'-title'}) {
3743                         $href_params{'-title'} = 'log';
3744                 }
3745
3746                 foreach my $format qw(RSS Atom) {
3747                         my $type = lc($format);
3748                         my %link_attr = (
3749                                 '-rel' => 'alternate',
3750                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3751                                 '-type' => "application/$type+xml"
3752                         );
3753
3754                         $href_params{'action'} = $type;
3755                         $link_attr{'-href'} = href(%href_params);
3756                         print "<link ".
3757                               "rel=\"$link_attr{'-rel'}\" ".
3758                               "title=\"$link_attr{'-title'}\" ".
3759                               "href=\"$link_attr{'-href'}\" ".
3760                               "type=\"$link_attr{'-type'}\" ".
3761                               "/>\n";
3762
3763                         $href_params{'extra_options'} = '--no-merges';
3764                         $link_attr{'-href'} = href(%href_params);
3765                         $link_attr{'-title'} .= ' (no merges)';
3766                         print "<link ".
3767                               "rel=\"$link_attr{'-rel'}\" ".
3768                               "title=\"$link_attr{'-title'}\" ".
3769                               "href=\"$link_attr{'-href'}\" ".
3770                               "type=\"$link_attr{'-type'}\" ".
3771                               "/>\n";
3772                 }
3773
3774         } else {
3775                 printf('<link rel="alternate" title="%s projects list" '.
3776                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3777                        $site_name, href(project=>undef, action=>"project_index"));
3778                 printf('<link rel="alternate" title="%s projects feeds" '.
3779                        'href="%s" type="text/x-opml" />'."\n",
3780                        $site_name, href(project=>undef, action=>"opml"));
3781         }
3782         if (defined $favicon) {
3783                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3784         }
3785
3786         print "</head>\n" .
3787               "<body>\n";
3788
3789         if (defined $site_header && -f $site_header) {
3790                 insert_file($site_header);
3791         }
3792
3793         print "<div class=\"page_header\">\n" .
3794               $cgi->a({-href => esc_url($logo_url),
3795                        -title => $logo_label},
3796                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3797         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3798         if (defined $project) {
3799                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3800                 if (defined $action) {
3801                         print " / $action";
3802                 }
3803                 print "\n";
3804         }
3805         print "</div>\n";
3806
3807         my $have_search = gitweb_check_feature('search');
3808         if (defined $project && $have_search) {
3809                 if (!defined $searchtext) {
3810                         $searchtext = "";
3811                 }
3812                 my $search_hash;
3813                 if (defined $hash_base) {
3814                         $search_hash = $hash_base;
3815                 } elsif (defined $hash) {
3816                         $search_hash = $hash;
3817                 } else {
3818                         $search_hash = "HEAD";
3819                 }
3820                 my $action = $my_uri;
3821                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3822                 if ($use_pathinfo) {
3823                         $action .= "/".esc_url($project);
3824                 }
3825                 print $cgi->startform(-method => "get", -action => $action) .
3826                       "<div class=\"search\">\n" .
3827                       (!$use_pathinfo &&
3828                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3829                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3830                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3831                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3832                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3833                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3834                       " search:\n",
3835                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3836                       "<span title=\"Extended regular expression\">" .
3837                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3838                                      -checked => $search_use_regexp) .
3839                       "</span>" .
3840                       "</div>" .
3841                       $cgi->end_form() . "\n";
3842         }
3843 }
3844
3845 sub git_footer_html {
3846         my $feed_class = 'rss_logo';
3847
3848         print "<div class=\"page_footer\">\n";
3849         if (defined $project) {
3850                 my $descr = git_get_project_description($project);
3851                 if (defined $descr) {
3852                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3853                 }
3854
3855                 my %href_params = get_feed_info();
3856                 if (!%href_params) {
3857                         $feed_class .= ' generic';
3858                 }
3859                 $href_params{'-title'} ||= 'log';
3860
3861                 foreach my $format qw(RSS Atom) {
3862                         $href_params{'action'} = lc($format);
3863                         print $cgi->a({-href => href(%href_params),
3864                                       -title => "$href_params{'-title'} $format feed",
3865                                       -class => $feed_class}, $format)."\n";
3866                 }
3867
3868         } else {
3869                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3870                               -class => $feed_class}, "OPML") . " ";
3871                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3872                               -class => $feed_class}, "TXT") . "\n";
3873         }
3874         print "</div>\n"; # class="page_footer"
3875
3876         # timing info doesn't make much sense with output (response) caching,
3877         # so when caching is enabled gitweb prints the time of page generation
3878         if ((defined $t0 || $caching_enabled) &&
3879             gitweb_check_feature('timed')) {
3880                 print "<div id=\"generating_info\">\n";
3881                 if ($caching_enabled) {
3882                         print 'This page was generated at '.
3883                               gmtime( time() )." GMT\n";
3884                 } else {
3885                         print 'This page took '.
3886                               '<span id="generating_time" class="time_span">'.
3887                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3888                               ' seconds </span>'.
3889                               ' and '.
3890                               '<span id="generating_cmd">'.
3891                               $number_of_git_cmds.
3892                               '</span> git commands '.
3893                               " to generate.\n";
3894                 }
3895                 print "</div>\n"; # class="page_footer"
3896         }
3897
3898         if (defined $site_footer && -f $site_footer) {
3899                 insert_file($site_footer);
3900         }
3901
3902         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3903         if (!$caching_enabled &&
3904             defined $action && $action eq 'blame_incremental') {
3905                 print qq!<script type="text/javascript">\n!.
3906                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3907                       qq!           "!. href() .qq!");\n!.
3908                       qq!</script>\n!;
3909         } elsif (gitweb_check_feature('javascript-actions')) {
3910                 print qq!<script type="text/javascript">\n!.
3911                       qq!window.onload = fixLinks;\n!.
3912                       qq!</script>\n!;
3913         }
3914
3915         print "</body>\n" .
3916               "</html>";
3917 }
3918
3919 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3920 # Example: die_error(404, 'Hash not found')
3921 # By convention, use the following status codes (as defined in RFC 2616):
3922 # 400: Invalid or missing CGI parameters, or
3923 #      requested object exists but has wrong type.
3924 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3925 #      this server or project.
3926 # 404: Requested object/revision/project doesn't exist.
3927 # 500: The server isn't configured properly, or
3928 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3929 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3930 # 503: The server is currently unavailable (because it is overloaded,
3931 #      or down for maintenance).  Generally, this is a temporary state.
3932 sub die_error {
3933         my $status = shift || 500;
3934         my $error = esc_html(shift) || "Internal Server Error";
3935         my $extra = shift;
3936         my %opts = @_;
3937
3938         my %http_responses = (
3939                 400 => '400 Bad Request',
3940                 403 => '403 Forbidden',
3941                 404 => '404 Not Found',
3942                 500 => '500 Internal Server Error',
3943                 503 => '503 Service Unavailable',
3944         );
3945
3946         # Do not cache error pages
3947         capture_stop($cache, $capture) if ($capture && $caching_enabled);
3948
3949         git_header_html($http_responses{$status}, undef, %opts);
3950         print <<EOF;
3951 <div class="page_body">
3952 <br /><br />
3953 $status - $error
3954 <br />
3955 EOF
3956         if (defined $extra) {
3957                 print "<hr />\n" .
3958                       "$extra\n";
3959         }
3960         print "</div>\n";
3961
3962         git_footer_html();
3963         goto DONE_GITWEB
3964                 unless ($opts{'-error_handler'});
3965 }
3966
3967 ## ----------------------------------------------------------------------
3968 ## functions printing or outputting HTML: navigation
3969
3970 sub git_print_page_nav {
3971         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3972         $extra = '' if !defined $extra; # pager or formats
3973
3974         my @navs = qw(summary shortlog log commit commitdiff tree);
3975         if ($suppress) {
3976                 @navs = grep { $_ ne $suppress } @navs;
3977         }
3978
3979         my %arg = map { $_ => {action=>$_} } @navs;
3980         if (defined $head) {
3981                 for (qw(commit commitdiff)) {
3982                         $arg{$_}{'hash'} = $head;
3983                 }
3984                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3985                         for (qw(shortlog log)) {
3986                                 $arg{$_}{'hash'} = $head;
3987                         }
3988                 }
3989         }
3990
3991         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3992         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3993
3994         my @actions = gitweb_get_feature('actions');
3995         my %repl = (
3996                 '%' => '%',
3997                 'n' => $project,         # project name
3998                 'f' => $git_dir,         # project path within filesystem
3999                 'h' => $treehead || '',  # current hash ('h' parameter)
4000                 'b' => $treebase || '',  # hash base ('hb' parameter)
4001         );
4002         while (@actions) {
4003                 my ($label, $link, $pos) = splice(@actions,0,3);
4004                 # insert
4005                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4006                 # munch munch
4007                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4008                 $arg{$label}{'_href'} = $link;
4009         }
4010
4011         print "<div class=\"page_nav\">\n" .
4012                 (join " | ",
4013                  map { $_ eq $current ?
4014                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4015                  } @navs);
4016         print "<br/>\n$extra<br/>\n" .
4017               "</div>\n";
4018 }
4019
4020 sub format_paging_nav {
4021         my ($action, $page, $has_next_link) = @_;
4022         my $paging_nav;
4023
4024
4025         if ($page > 0) {
4026                 $paging_nav .=
4027                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4028                         " &sdot; " .
4029                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4030                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4031         } else {
4032                 $paging_nav .= "first &sdot; prev";
4033         }
4034
4035         if ($has_next_link) {
4036                 $paging_nav .= " &sdot; " .
4037                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4038                                  -accesskey => "n", -title => "Alt-n"}, "next");
4039         } else {
4040                 $paging_nav .= " &sdot; next";
4041         }
4042
4043         return $paging_nav;
4044 }
4045
4046 ## ......................................................................
4047 ## functions printing or outputting HTML: div
4048
4049 sub git_print_header_div {
4050         my ($action, $title, $hash, $hash_base) = @_;
4051         my %args = ();
4052
4053         $args{'action'} = $action;
4054         $args{'hash'} = $hash if $hash;
4055         $args{'hash_base'} = $hash_base if $hash_base;
4056
4057         print "<div class=\"header\">\n" .
4058               $cgi->a({-href => href(%args), -class => "title"},
4059               $title ? $title : $action) .
4060               "\n</div>\n";
4061 }
4062
4063 sub print_local_time {
4064         print format_local_time(@_);
4065 }
4066
4067 sub format_local_time {
4068         my $localtime = '';
4069         my %date = @_;
4070         if ($date{'hour_local'} < 6) {
4071                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4072                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4073         } else {
4074                 $localtime .= sprintf(" (%02d:%02d %s)",
4075                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4076         }
4077
4078         return $localtime;
4079 }
4080
4081 # Outputs the author name and date in long form
4082 sub git_print_authorship {
4083         my $co = shift;
4084         my %opts = @_;
4085         my $tag = $opts{-tag} || 'div';
4086         my $author = $co->{'author_name'};
4087
4088         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4089         print "<$tag class=\"author_date\">" .
4090               format_search_author($author, "author", esc_html($author)) .
4091               " [$ad{'rfc2822'}";
4092         print_local_time(%ad) if ($opts{-localtime});
4093         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
4094                   . "</$tag>\n";
4095 }
4096
4097 # Outputs table rows containing the full author or committer information,
4098 # in the format expected for 'commit' view (& similar).
4099 # Parameters are a commit hash reference, followed by the list of people
4100 # to output information for. If the list is empty it defaults to both
4101 # author and committer.
4102 sub git_print_authorship_rows {
4103         my $co = shift;
4104         # too bad we can't use @people = @_ || ('author', 'committer')
4105         my @people = @_;
4106         @people = ('author', 'committer') unless @people;
4107         foreach my $who (@people) {
4108                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4109                 print "<tr><td>$who</td><td>" .
4110                       format_search_author($co->{"${who}_name"}, $who,
4111                                esc_html($co->{"${who}_name"})) . " " .
4112                       format_search_author($co->{"${who}_email"}, $who,
4113                                esc_html("<" . $co->{"${who}_email"} . ">")) .
4114                       "</td><td rowspan=\"2\">" .
4115                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4116                       "</td></tr>\n" .
4117                       "<tr>" .
4118                       "<td></td><td> $wd{'rfc2822'}";
4119                 print_local_time(%wd);
4120                 print "</td>" .
4121                       "</tr>\n";
4122         }
4123 }
4124
4125 sub git_print_page_path {
4126         my $name = shift;
4127         my $type = shift;
4128         my $hb = shift;
4129
4130
4131         print "<div class=\"page_path\">";
4132         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4133                       -title => 'tree root'}, to_utf8("[$project]"));
4134         print " / ";
4135         if (defined $name) {
4136                 my @dirname = split '/', $name;
4137                 my $basename = pop @dirname;
4138                 my $fullname = '';
4139
4140                 foreach my $dir (@dirname) {
4141                         $fullname .= ($fullname ? '/' : '') . $dir;
4142                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4143                                                      hash_base=>$hb),
4144                                       -title => $fullname}, esc_path($dir));
4145                         print " / ";
4146                 }
4147                 if (defined $type && $type eq 'blob') {
4148                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4149                                                      hash_base=>$hb),
4150                                       -title => $name}, esc_path($basename));
4151                 } elsif (defined $type && $type eq 'tree') {
4152                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4153                                                      hash_base=>$hb),
4154                                       -title => $name}, esc_path($basename));
4155                         print " / ";
4156                 } else {
4157                         print esc_path($basename);
4158                 }
4159         }
4160         print "<br/></div>\n";
4161 }
4162
4163 sub git_print_log {
4164         my $log = shift;
4165         my %opts = @_;
4166
4167         if ($opts{'-remove_title'}) {
4168                 # remove title, i.e. first line of log
4169                 shift @$log;
4170         }
4171         # remove leading empty lines
4172         while (defined $log->[0] && $log->[0] eq "") {
4173                 shift @$log;
4174         }
4175
4176         # print log
4177         my $signoff = 0;
4178         my $empty = 0;
4179         foreach my $line (@$log) {
4180                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4181                         $signoff = 1;
4182                         $empty = 0;
4183                         if (! $opts{'-remove_signoff'}) {
4184                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4185                                 next;
4186                         } else {
4187                                 # remove signoff lines
4188                                 next;
4189                         }
4190                 } else {
4191                         $signoff = 0;
4192                 }
4193
4194                 # print only one empty line
4195                 # do not print empty line after signoff
4196                 if ($line eq "") {
4197                         next if ($empty || $signoff);
4198                         $empty = 1;
4199                 } else {
4200                         $empty = 0;
4201                 }
4202
4203                 print format_log_line_html($line) . "<br/>\n";
4204         }
4205
4206         if ($opts{'-final_empty_line'}) {
4207                 # end with single empty line
4208                 print "<br/>\n" unless $empty;
4209         }
4210 }
4211
4212 # return link target (what link points to)
4213 sub git_get_link_target {
4214         my $hash = shift;
4215         my $link_target;
4216
4217         # read link
4218         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4219                 or return;
4220         {
4221                 local $/ = undef;
4222                 $link_target = <$fd>;
4223         }
4224         close $fd
4225                 or return;
4226
4227         return $link_target;
4228 }
4229
4230 # given link target, and the directory (basedir) the link is in,
4231 # return target of link relative to top directory (top tree);
4232 # return undef if it is not possible (including absolute links).
4233 sub normalize_link_target {
4234         my ($link_target, $basedir) = @_;
4235
4236         # absolute symlinks (beginning with '/') cannot be normalized
4237         return if (substr($link_target, 0, 1) eq '/');
4238
4239         # normalize link target to path from top (root) tree (dir)
4240         my $path;
4241         if ($basedir) {
4242                 $path = $basedir . '/' . $link_target;
4243         } else {
4244                 # we are in top (root) tree (dir)
4245                 $path = $link_target;
4246         }
4247
4248         # remove //, /./, and /../
4249         my @path_parts;
4250         foreach my $part (split('/', $path)) {
4251                 # discard '.' and ''
4252                 next if (!$part || $part eq '.');
4253                 # handle '..'
4254                 if ($part eq '..') {
4255                         if (@path_parts) {
4256                                 pop @path_parts;
4257                         } else {
4258                                 # link leads outside repository (outside top dir)
4259                                 return;
4260                         }
4261                 } else {
4262                         push @path_parts, $part;
4263                 }
4264         }
4265         $path = join('/', @path_parts);
4266
4267         return $path;
4268 }
4269
4270 # print tree entry (row of git_tree), but without encompassing <tr> element
4271 sub git_print_tree_entry {
4272         my ($t, $basedir, $hash_base, $have_blame) = @_;
4273
4274         my %base_key = ();
4275         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4276
4277         # The format of a table row is: mode list link.  Where mode is
4278         # the mode of the entry, list is the name of the entry, an href,
4279         # and link is the action links of the entry.
4280
4281         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4282         if (exists $t->{'size'}) {
4283                 print "<td class=\"size\">$t->{'size'}</td>\n";
4284         }
4285         if ($t->{'type'} eq "blob") {
4286                 print "<td class=\"list\">" .
4287                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4288                                                file_name=>"$basedir$t->{'name'}", %base_key),
4289                                 -class => "list"}, esc_path($t->{'name'}));
4290                 if (S_ISLNK(oct $t->{'mode'})) {
4291                         my $link_target = git_get_link_target($t->{'hash'});
4292                         if ($link_target) {
4293                                 my $norm_target = normalize_link_target($link_target, $basedir);
4294                                 if (defined $norm_target) {
4295                                         print " -> " .
4296                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4297                                                                      file_name=>$norm_target),
4298                                                        -title => $norm_target}, esc_path($link_target));
4299                                 } else {
4300                                         print " -> " . esc_path($link_target);
4301                                 }
4302                         }
4303                 }
4304                 print "</td>\n";
4305                 print "<td class=\"link\">";
4306                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4307                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4308                               "blob");
4309                 if ($have_blame) {
4310                         print " | " .
4311                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4312                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4313                                       "blame");
4314                 }
4315                 if (defined $hash_base) {
4316                         print " | " .
4317                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4318                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4319                                       "history");
4320                 }
4321                 print " | " .
4322                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4323                                                file_name=>"$basedir$t->{'name'}")},
4324                                 "raw");
4325                 print "</td>\n";
4326
4327         } elsif ($t->{'type'} eq "tree") {
4328                 print "<td class=\"list\">";
4329                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4330                                              file_name=>"$basedir$t->{'name'}",
4331                                              %base_key)},
4332                               esc_path($t->{'name'}));
4333                 print "</td>\n";
4334                 print "<td class=\"link\">";
4335                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4336                                              file_name=>"$basedir$t->{'name'}",
4337                                              %base_key)},
4338                               "tree");
4339                 if (defined $hash_base) {
4340                         print " | " .
4341                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4342                                                      file_name=>"$basedir$t->{'name'}")},
4343                                       "history");
4344                 }
4345                 print "</td>\n";
4346         } else {
4347                 # unknown object: we can only present history for it
4348                 # (this includes 'commit' object, i.e. submodule support)
4349                 print "<td class=\"list\">" .
4350                       esc_path($t->{'name'}) .
4351                       "</td>\n";
4352                 print "<td class=\"link\">";
4353                 if (defined $hash_base) {
4354                         print $cgi->a({-href => href(action=>"history",
4355                                                      hash_base=>$hash_base,
4356                                                      file_name=>"$basedir$t->{'name'}")},
4357                                       "history");
4358                 }
4359                 print "</td>\n";
4360         }
4361 }
4362
4363 ## ......................................................................
4364 ## functions printing large fragments of HTML
4365
4366 # get pre-image filenames for merge (combined) diff
4367 sub fill_from_file_info {
4368         my ($diff, @parents) = @_;
4369
4370         $diff->{'from_file'} = [ ];
4371         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4372         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4373                 if ($diff->{'status'}[$i] eq 'R' ||
4374                     $diff->{'status'}[$i] eq 'C') {
4375                         $diff->{'from_file'}[$i] =
4376                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4377                 }
4378         }
4379
4380         return $diff;
4381 }
4382
4383 # is current raw difftree line of file deletion
4384 sub is_deleted {
4385         my $diffinfo = shift;
4386
4387         return $diffinfo->{'to_id'} eq ('0' x 40);
4388 }
4389
4390 # does patch correspond to [previous] difftree raw line
4391 # $diffinfo  - hashref of parsed raw diff format
4392 # $patchinfo - hashref of parsed patch diff format
4393 #              (the same keys as in $diffinfo)
4394 sub is_patch_split {
4395         my ($diffinfo, $patchinfo) = @_;
4396
4397         return defined $diffinfo && defined $patchinfo
4398                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4399 }
4400
4401
4402 sub git_difftree_body {
4403         my ($difftree, $hash, @parents) = @_;
4404         my ($parent) = $parents[0];
4405         my $have_blame = gitweb_check_feature('blame');
4406         print "<div class=\"list_head\">\n";
4407         if ($#{$difftree} > 10) {
4408                 print(($#{$difftree} + 1) . " files changed:\n");
4409         }
4410         print "</div>\n";
4411
4412         print "<table class=\"" .
4413               (@parents > 1 ? "combined " : "") .
4414               "diff_tree\">\n";
4415
4416         # header only for combined diff in 'commitdiff' view
4417         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4418         if ($has_header) {
4419                 # table header
4420                 print "<thead><tr>\n" .
4421                        "<th></th><th></th>\n"; # filename, patchN link
4422                 for (my $i = 0; $i < @parents; $i++) {
4423                         my $par = $parents[$i];
4424                         print "<th>" .
4425                               $cgi->a({-href => href(action=>"commitdiff",
4426                                                      hash=>$hash, hash_parent=>$par),
4427                                        -title => 'commitdiff to parent number ' .
4428                                                   ($i+1) . ': ' . substr($par,0,7)},
4429                                       $i+1) .
4430                               "&nbsp;</th>\n";
4431                 }
4432                 print "</tr></thead>\n<tbody>\n";
4433         }
4434
4435         my $alternate = 1;
4436         my $patchno = 0;
4437         foreach my $line (@{$difftree}) {
4438                 my $diff = parsed_difftree_line($line);
4439
4440                 if ($alternate) {
4441                         print "<tr class=\"dark\">\n";
4442                 } else {
4443                         print "<tr class=\"light\">\n";
4444                 }
4445                 $alternate ^= 1;
4446
4447                 if (exists $diff->{'nparents'}) { # combined diff
4448
4449                         fill_from_file_info($diff, @parents)
4450                                 unless exists $diff->{'from_file'};
4451
4452                         if (!is_deleted($diff)) {
4453                                 # file exists in the result (child) commit
4454                                 print "<td>" .
4455                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4456                                                              file_name=>$diff->{'to_file'},
4457                                                              hash_base=>$hash),
4458                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4459                                       "</td>\n";
4460                         } else {
4461                                 print "<td>" .
4462                                       esc_path($diff->{'to_file'}) .
4463                                       "</td>\n";
4464                         }
4465
4466                         if ($action eq 'commitdiff') {
4467                                 # link to patch
4468                                 $patchno++;
4469                                 print "<td class=\"link\">" .
4470                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4471                                       " | " .
4472                                       "</td>\n";
4473                         }
4474
4475                         my $has_history = 0;
4476                         my $not_deleted = 0;
4477                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4478                                 my $hash_parent = $parents[$i];
4479                                 my $from_hash = $diff->{'from_id'}[$i];
4480                                 my $from_path = $diff->{'from_file'}[$i];
4481                                 my $status = $diff->{'status'}[$i];
4482
4483                                 $has_history ||= ($status ne 'A');
4484                                 $not_deleted ||= ($status ne 'D');
4485
4486                                 if ($status eq 'A') {
4487                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4488                                 } elsif ($status eq 'D') {
4489                                         print "<td class=\"link\">" .
4490                                               $cgi->a({-href => href(action=>"blob",
4491                                                                      hash_base=>$hash,
4492                                                                      hash=>$from_hash,
4493                                                                      file_name=>$from_path)},
4494                                                       "blob" . ($i+1)) .
4495                                               " | </td>\n";
4496                                 } else {
4497                                         if ($diff->{'to_id'} eq $from_hash) {
4498                                                 print "<td class=\"link nochange\">";
4499                                         } else {
4500                                                 print "<td class=\"link\">";
4501                                         }
4502                                         print $cgi->a({-href => href(action=>"blobdiff",
4503                                                                      hash=>$diff->{'to_id'},
4504                                                                      hash_parent=>$from_hash,
4505                                                                      hash_base=>$hash,
4506                                                                      hash_parent_base=>$hash_parent,
4507                                                                      file_name=>$diff->{'to_file'},
4508                                                                      file_parent=>$from_path)},
4509                                                       "diff" . ($i+1)) .
4510                                               " | </td>\n";
4511                                 }
4512                         }
4513
4514                         print "<td class=\"link\">";
4515                         if ($not_deleted) {
4516                                 print $cgi->a({-href => href(action=>"blob",
4517                                                              hash=>$diff->{'to_id'},
4518                                                              file_name=>$diff->{'to_file'},
4519                                                              hash_base=>$hash)},
4520                                               "blob");
4521                                 print " | " if ($has_history);
4522                         }
4523                         if ($has_history) {
4524                                 print $cgi->a({-href => href(action=>"history",
4525                                                              file_name=>$diff->{'to_file'},
4526                                                              hash_base=>$hash)},
4527                                               "history");
4528                         }
4529                         print "</td>\n";
4530
4531                         print "</tr>\n";
4532                         next; # instead of 'else' clause, to avoid extra indent
4533                 }
4534                 # else ordinary diff
4535
4536                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4537                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4538                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4539                         $to_mode_oct = oct $diff->{'to_mode'};
4540                         if (S_ISREG($to_mode_oct)) { # only for regular file
4541                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4542                         }
4543                         $to_file_type = file_type($diff->{'to_mode'});
4544                 }
4545                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4546                         $from_mode_oct = oct $diff->{'from_mode'};
4547                         if (S_ISREG($to_mode_oct)) { # only for regular file
4548                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4549                         }
4550                         $from_file_type = file_type($diff->{'from_mode'});
4551                 }
4552
4553                 if ($diff->{'status'} eq "A") { # created
4554                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4555                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4556                         $mode_chng   .= "]</span>";
4557                         print "<td>";
4558                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4559                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4560                                       -class => "list"}, esc_path($diff->{'file'}));
4561                         print "</td>\n";
4562                         print "<td>$mode_chng</td>\n";
4563                         print "<td class=\"link\">";
4564                         if ($action eq 'commitdiff') {
4565                                 # link to patch
4566                                 $patchno++;
4567                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4568                                 print " | ";
4569                         }
4570                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4571                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4572                                       "blob");
4573                         print "</td>\n";
4574
4575                 } elsif ($diff->{'status'} eq "D") { # deleted
4576                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4577                         print "<td>";
4578                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4579                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4580                                        -class => "list"}, esc_path($diff->{'file'}));
4581                         print "</td>\n";
4582                         print "<td>$mode_chng</td>\n";
4583                         print "<td class=\"link\">";
4584                         if ($action eq 'commitdiff') {
4585                                 # link to patch
4586                                 $patchno++;
4587                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4588                                 print " | ";
4589                         }
4590                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4591                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4592                                       "blob") . " | ";
4593                         if ($have_blame) {
4594                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4595                                                              file_name=>$diff->{'file'})},
4596                                               "blame") . " | ";
4597                         }
4598                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4599                                                      file_name=>$diff->{'file'})},
4600                                       "history");
4601                         print "</td>\n";
4602
4603                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4604                         my $mode_chnge = "";
4605                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4606                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4607                                 if ($from_file_type ne $to_file_type) {
4608                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4609                                 }
4610                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4611                                         if ($from_mode_str && $to_mode_str) {
4612                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4613                                         } elsif ($to_mode_str) {
4614                                                 $mode_chnge .= " mode: $to_mode_str";
4615                                         }
4616                                 }
4617                                 $mode_chnge .= "]</span>\n";
4618                         }
4619                         print "<td>";
4620                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4621                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4622                                       -class => "list"}, esc_path($diff->{'file'}));
4623                         print "</td>\n";
4624                         print "<td>$mode_chnge</td>\n";
4625                         print "<td class=\"link\">";
4626                         if ($action eq 'commitdiff') {
4627                                 # link to patch
4628                                 $patchno++;
4629                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4630                                       " | ";
4631                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4632                                 # "commit" view and modified file (not onlu mode changed)
4633                                 print $cgi->a({-href => href(action=>"blobdiff",
4634                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4635                                                              hash_base=>$hash, hash_parent_base=>$parent,
4636                                                              file_name=>$diff->{'file'})},
4637                                               "diff") .
4638                                       " | ";
4639                         }
4640                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4641                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4642                                        "blob") . " | ";
4643                         if ($have_blame) {
4644                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4645                                                              file_name=>$diff->{'file'})},
4646                                               "blame") . " | ";
4647                         }
4648                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4649                                                      file_name=>$diff->{'file'})},
4650                                       "history");
4651                         print "</td>\n";
4652
4653                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4654                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4655                         my $nstatus = $status_name{$diff->{'status'}};
4656                         my $mode_chng = "";
4657                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4658                                 # mode also for directories, so we cannot use $to_mode_str
4659                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4660                         }
4661                         print "<td>" .
4662                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4663                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4664                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4665                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4666                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4667                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4668                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4669                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4670                               "<td class=\"link\">";
4671                         if ($action eq 'commitdiff') {
4672                                 # link to patch
4673                                 $patchno++;
4674                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4675                                       " | ";
4676                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4677                                 # "commit" view and modified file (not only pure rename or copy)
4678                                 print $cgi->a({-href => href(action=>"blobdiff",
4679                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4680                                                              hash_base=>$hash, hash_parent_base=>$parent,
4681                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4682                                               "diff") .
4683                                       " | ";
4684                         }
4685                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4686                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4687                                       "blob") . " | ";
4688                         if ($have_blame) {
4689                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4690                                                              file_name=>$diff->{'to_file'})},
4691                                               "blame") . " | ";
4692                         }
4693                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4694                                                     file_name=>$diff->{'to_file'})},
4695                                       "history");
4696                         print "</td>\n";
4697
4698                 } # we should not encounter Unmerged (U) or Unknown (X) status
4699                 print "</tr>\n";
4700         }
4701         print "</tbody>" if $has_header;
4702         print "</table>\n";
4703 }
4704
4705 sub git_patchset_body {
4706         my ($fd, $difftree, $hash, @hash_parents) = @_;
4707         my ($hash_parent) = $hash_parents[0];
4708
4709         my $is_combined = (@hash_parents > 1);
4710         my $patch_idx = 0;
4711         my $patch_number = 0;
4712         my $patch_line;
4713         my $diffinfo;
4714         my $to_name;
4715         my (%from, %to);
4716
4717         print "<div class=\"patchset\">\n";
4718
4719         # skip to first patch
4720         while ($patch_line = <$fd>) {
4721                 chomp $patch_line;
4722
4723                 last if ($patch_line =~ m/^diff /);
4724         }
4725
4726  PATCH:
4727         while ($patch_line) {
4728
4729                 # parse "git diff" header line
4730                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4731                         # $1 is from_name, which we do not use
4732                         $to_name = unquote($2);
4733                         $to_name =~ s!^b/!!;
4734                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4735                         # $1 is 'cc' or 'combined', which we do not use
4736                         $to_name = unquote($2);
4737                 } else {
4738                         $to_name = undef;
4739                 }
4740
4741                 # check if current patch belong to current raw line
4742                 # and parse raw git-diff line if needed
4743                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4744                         # this is continuation of a split patch
4745                         print "<div class=\"patch cont\">\n";
4746                 } else {
4747                         # advance raw git-diff output if needed
4748                         $patch_idx++ if defined $diffinfo;
4749
4750                         # read and prepare patch information
4751                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4752
4753                         # compact combined diff output can have some patches skipped
4754                         # find which patch (using pathname of result) we are at now;
4755                         if ($is_combined) {
4756                                 while ($to_name ne $diffinfo->{'to_file'}) {
4757                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4758                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4759                                               "</div>\n";  # class="patch"
4760
4761                                         $patch_idx++;
4762                                         $patch_number++;
4763
4764                                         last if $patch_idx > $#$difftree;
4765                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4766                                 }
4767                         }
4768
4769                         # modifies %from, %to hashes
4770                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4771
4772                         # this is first patch for raw difftree line with $patch_idx index
4773                         # we index @$difftree array from 0, but number patches from 1
4774                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4775                 }
4776
4777                 # git diff header
4778                 #assert($patch_line =~ m/^diff /) if DEBUG;
4779                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4780                 $patch_number++;
4781                 # print "git diff" header
4782                 print format_git_diff_header_line($patch_line, $diffinfo,
4783                                                   \%from, \%to);
4784
4785                 # print extended diff header
4786                 print "<div class=\"diff extended_header\">\n";
4787         EXTENDED_HEADER:
4788                 while ($patch_line = <$fd>) {
4789                         chomp $patch_line;
4790
4791                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4792
4793                         print format_extended_diff_header_line($patch_line, $diffinfo,
4794                                                                \%from, \%to);
4795                 }
4796                 print "</div>\n"; # class="diff extended_header"
4797
4798                 # from-file/to-file diff header
4799                 if (! $patch_line) {
4800                         print "</div>\n"; # class="patch"
4801                         last PATCH;
4802                 }
4803                 next PATCH if ($patch_line =~ m/^diff /);
4804                 #assert($patch_line =~ m/^---/) if DEBUG;
4805
4806                 my $last_patch_line = $patch_line;
4807                 $patch_line = <$fd>;
4808                 chomp $patch_line;
4809                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4810
4811                 print format_diff_from_to_header($last_patch_line, $patch_line,
4812                                                  $diffinfo, \%from, \%to,
4813                                                  @hash_parents);
4814
4815                 # the patch itself
4816         LINE:
4817                 while ($patch_line = <$fd>) {
4818                         chomp $patch_line;
4819
4820                         next PATCH if ($patch_line =~ m/^diff /);
4821
4822                         print format_diff_line($patch_line, \%from, \%to);
4823                 }
4824
4825         } continue {
4826                 print "</div>\n"; # class="patch"
4827         }
4828
4829         # for compact combined (--cc) format, with chunk and patch simplification
4830         # the patchset might be empty, but there might be unprocessed raw lines
4831         for (++$patch_idx if $patch_number > 0;
4832              $patch_idx < @$difftree;
4833              ++$patch_idx) {
4834                 # read and prepare patch information
4835                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4836
4837                 # generate anchor for "patch" links in difftree / whatchanged part
4838                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4839                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4840                       "</div>\n";  # class="patch"
4841
4842                 $patch_number++;
4843         }
4844
4845         if ($patch_number == 0) {
4846                 if (@hash_parents > 1) {
4847                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4848                 } else {
4849                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4850                 }
4851         }
4852
4853         print "</div>\n"; # class="patchset"
4854 }
4855
4856 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4857
4858 # fills project list info (age, description, owner, forks) for each
4859 # project in the list, removing invalid projects from returned list
4860 # NOTE: modifies $projlist, but does not remove entries from it
4861 sub fill_project_list_info {
4862         my ($projlist, $check_forks) = @_;
4863         my @projects;
4864
4865         my $show_ctags = gitweb_check_feature('ctags');
4866  PROJECT:
4867         foreach my $pr (@$projlist) {
4868                 my (@activity) = git_get_last_activity($pr->{'path'});
4869                 unless (@activity) {
4870                         next PROJECT;
4871                 }
4872                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4873                 if (!defined $pr->{'descr'}) {
4874                         my $descr = git_get_project_description($pr->{'path'}) || "";
4875                         $descr = to_utf8($descr);
4876                         $pr->{'descr_long'} = $descr;
4877                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4878                 }
4879                 if (!defined $pr->{'owner'}) {
4880                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4881                 }
4882                 if ($check_forks) {
4883                         my $pname = $pr->{'path'};
4884                         if (($pname =~ s/\.git$//) &&
4885                             ($pname !~ /\/$/) &&
4886                             (-d "$projectroot/$pname")) {
4887                                 $pr->{'forks'} = "-d $projectroot/$pname";
4888                         } else {
4889                                 $pr->{'forks'} = 0;
4890                         }
4891                 }
4892                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4893                 push @projects, $pr;
4894         }
4895
4896         return @projects;
4897 }
4898
4899 # print 'sort by' <th> element, generating 'sort by $name' replay link
4900 # if that order is not selected
4901 sub print_sort_th {
4902         print format_sort_th(@_);
4903 }
4904
4905 sub format_sort_th {
4906         my ($name, $order, $header) = @_;
4907         my $sort_th = "";
4908         $header ||= ucfirst($name);
4909
4910         if ($order eq $name) {
4911                 $sort_th .= "<th>$header</th>\n";
4912         } else {
4913                 $sort_th .= "<th>" .
4914                             $cgi->a({-href => href(-replay=>1, order=>$name),
4915                                      -class => "header"}, $header) .
4916                             "</th>\n";
4917         }
4918
4919         return $sort_th;
4920 }
4921
4922 sub git_project_list_body {
4923         # actually uses global variable $project
4924         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4925
4926         my $check_forks = gitweb_check_feature('forks');
4927         my @projects = fill_project_list_info($projlist, $check_forks);
4928
4929         $order ||= $default_projects_order;
4930         $from = 0 unless defined $from;
4931         $to = $#projects if (!defined $to || $#projects < $to);
4932
4933         my %order_info = (
4934                 project => { key => 'path', type => 'str' },
4935                 descr => { key => 'descr_long', type => 'str' },
4936                 owner => { key => 'owner', type => 'str' },
4937                 age => { key => 'age', type => 'num' }
4938         );
4939         my $oi = $order_info{$order};
4940         if ($oi->{'type'} eq 'str') {
4941                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4942         } else {
4943                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4944         }
4945
4946         my $show_ctags = gitweb_check_feature('ctags');
4947         if ($show_ctags) {
4948                 my %ctags;
4949                 foreach my $p (@projects) {
4950                         foreach my $ct (keys %{$p->{'ctags'}}) {
4951                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4952                         }
4953                 }
4954                 my $cloud = git_populate_project_tagcloud(\%ctags);
4955                 print git_show_project_tagcloud($cloud, 64);
4956         }
4957
4958         print "<table class=\"project_list\">\n";
4959         unless ($no_header) {
4960                 print "<tr>\n";
4961                 if ($check_forks) {
4962                         print "<th></th>\n";
4963                 }
4964                 print_sort_th('project', $order, 'Project');
4965                 print_sort_th('descr', $order, 'Description');
4966                 print_sort_th('owner', $order, 'Owner');
4967                 print_sort_th('age', $order, 'Last Change');
4968                 print "<th></th>\n" . # for links
4969                       "</tr>\n";
4970         }
4971         my $alternate = 1;
4972         my $tagfilter = $cgi->param('by_tag');
4973         for (my $i = $from; $i <= $to; $i++) {
4974                 my $pr = $projects[$i];
4975
4976                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4977                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4978                         and not $pr->{'descr_long'} =~ /$searchtext/;
4979                 # Weed out forks or non-matching entries of search
4980                 if ($check_forks) {
4981                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4982                         $forkbase="^$forkbase" if $forkbase;
4983                         next if not $searchtext and not $tagfilter and $show_ctags
4984                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4985                 }
4986
4987                 if ($alternate) {
4988                         print "<tr class=\"dark\">\n";
4989                 } else {
4990                         print "<tr class=\"light\">\n";
4991                 }
4992                 $alternate ^= 1;
4993                 if ($check_forks) {
4994                         print "<td>";
4995                         if ($pr->{'forks'}) {
4996                                 print "<!-- $pr->{'forks'} -->\n";
4997                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4998                         }
4999                         print "</td>\n";
5000                 }
5001                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5002                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5003                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5004                                         -class => "list", -title => $pr->{'descr_long'}},
5005                                         esc_html($pr->{'descr'})) . "</td>\n" .
5006                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5007                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5008                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5009                       "<td class=\"link\">" .
5010                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5011                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5012                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5013                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5014                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5015                       "</td>\n" .
5016                       "</tr>\n";
5017         }
5018         if (defined $extra) {
5019                 print "<tr>\n";
5020                 if ($check_forks) {
5021                         print "<td></td>\n";
5022                 }
5023                 print "<td colspan=\"5\">$extra</td>\n" .
5024                       "</tr>\n";
5025         }
5026         print "</table>\n";
5027 }
5028
5029 sub git_log_body {
5030         # uses global variable $project
5031         my ($commitlist, $from, $to, $refs, $extra) = @_;
5032
5033         $from = 0 unless defined $from;
5034         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5035
5036         for (my $i = 0; $i <= $to; $i++) {
5037                 my %co = %{$commitlist->[$i]};
5038                 next if !%co;
5039                 my $commit = $co{'id'};
5040                 my $ref = format_ref_marker($refs, $commit);
5041                 my %ad = parse_date($co{'author_epoch'});
5042                 git_print_header_div('commit',
5043                                "<span class=\"age\">$co{'age_string'}</span>" .
5044                                esc_html($co{'title'}) . $ref,
5045                                $commit);
5046                 print "<div class=\"title_text\">\n" .
5047                       "<div class=\"log_link\">\n" .
5048                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5049                       " | " .
5050                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5051                       " | " .
5052                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5053                       "<br/>\n" .
5054                       "</div>\n";
5055                       git_print_authorship(\%co, -tag => 'span');
5056                       print "<br/>\n</div>\n";
5057
5058                 print "<div class=\"log_body\">\n";
5059                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5060                 print "</div>\n";
5061         }
5062         if ($extra) {
5063                 print "<div class=\"page_nav\">\n";
5064                 print "$extra\n";
5065                 print "</div>\n";
5066         }
5067 }
5068
5069 sub git_shortlog_body {
5070         # uses global variable $project
5071         my ($commitlist, $from, $to, $refs, $extra) = @_;
5072
5073         $from = 0 unless defined $from;
5074         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5075
5076         print "<table class=\"shortlog\">\n";
5077         my $alternate = 1;
5078         for (my $i = $from; $i <= $to; $i++) {
5079                 my %co = %{$commitlist->[$i]};
5080                 my $commit = $co{'id'};
5081                 my $ref = format_ref_marker($refs, $commit);
5082                 if ($alternate) {
5083                         print "<tr class=\"dark\">\n";
5084                 } else {
5085                         print "<tr class=\"light\">\n";
5086                 }
5087                 $alternate ^= 1;
5088                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5089                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5090                       format_author_html('td', \%co, 10) . "<td>";
5091                 print format_subject_html($co{'title'}, $co{'title_short'},
5092                                           href(action=>"commit", hash=>$commit), $ref);
5093                 print "</td>\n" .
5094                       "<td class=\"link\">" .
5095                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5096                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5097                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5098                 my $snapshot_links = format_snapshot_links($commit);
5099                 if (defined $snapshot_links) {
5100                         print " | " . $snapshot_links;
5101                 }
5102                 print "</td>\n" .
5103                       "</tr>\n";
5104         }
5105         if (defined $extra) {
5106                 print "<tr>\n" .
5107                       "<td colspan=\"4\">$extra</td>\n" .
5108                       "</tr>\n";
5109         }
5110         print "</table>\n";
5111 }
5112
5113 sub git_history_body {
5114         # Warning: assumes constant type (blob or tree) during history
5115         my ($commitlist, $from, $to, $refs, $extra,
5116             $file_name, $file_hash, $ftype) = @_;
5117
5118         $from = 0 unless defined $from;
5119         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5120
5121         print "<table class=\"history\">\n";
5122         my $alternate = 1;
5123         for (my $i = $from; $i <= $to; $i++) {
5124                 my %co = %{$commitlist->[$i]};
5125                 if (!%co) {
5126                         next;
5127                 }
5128                 my $commit = $co{'id'};
5129
5130                 my $ref = format_ref_marker($refs, $commit);
5131
5132                 if ($alternate) {
5133                         print "<tr class=\"dark\">\n";
5134                 } else {
5135                         print "<tr class=\"light\">\n";
5136                 }
5137                 $alternate ^= 1;
5138                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5139         # shortlog:   format_author_html('td', \%co, 10)
5140                       format_author_html('td', \%co, 15, 3) . "<td>";
5141                 # originally git_history used chop_str($co{'title'}, 50)
5142                 print format_subject_html($co{'title'}, $co{'title_short'},
5143                                           href(action=>"commit", hash=>$commit), $ref);
5144                 print "</td>\n" .
5145                       "<td class=\"link\">" .
5146                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5147                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5148
5149                 if ($ftype eq 'blob') {
5150                         my $blob_current = $file_hash;
5151                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5152                         if (defined $blob_current && defined $blob_parent &&
5153                                         $blob_current ne $blob_parent) {
5154                                 print " | " .
5155                                         $cgi->a({-href => href(action=>"blobdiff",
5156                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5157                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5158                                                                file_name=>$file_name)},
5159                                                 "diff to current");
5160                         }
5161                 }
5162                 print "</td>\n" .
5163                       "</tr>\n";
5164         }
5165         if (defined $extra) {
5166                 print "<tr>\n" .
5167                       "<td colspan=\"4\">$extra</td>\n" .
5168                       "</tr>\n";
5169         }
5170         print "</table>\n";
5171 }
5172
5173 sub git_tags_body {
5174         # uses global variable $project
5175         my ($taglist, $from, $to, $extra) = @_;
5176         $from = 0 unless defined $from;
5177         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5178
5179         print "<table class=\"tags\">\n";
5180         my $alternate = 1;
5181         for (my $i = $from; $i <= $to; $i++) {
5182                 my $entry = $taglist->[$i];
5183                 my %tag = %$entry;
5184                 my $comment = $tag{'subject'};
5185                 my $comment_short;
5186                 if (defined $comment) {
5187                         $comment_short = chop_str($comment, 30, 5);
5188                 }
5189                 if ($alternate) {
5190                         print "<tr class=\"dark\">\n";
5191                 } else {
5192                         print "<tr class=\"light\">\n";
5193                 }
5194                 $alternate ^= 1;
5195                 if (defined $tag{'age'}) {
5196                         print "<td><i>$tag{'age'}</i></td>\n";
5197                 } else {
5198                         print "<td></td>\n";
5199                 }
5200                 print "<td>" .
5201                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5202                                -class => "list name"}, esc_html($tag{'name'})) .
5203                       "</td>\n" .
5204                       "<td>";
5205                 if (defined $comment) {
5206                         print format_subject_html($comment, $comment_short,
5207                                                   href(action=>"tag", hash=>$tag{'id'}));
5208                 }
5209                 print "</td>\n" .
5210                       "<td class=\"selflink\">";
5211                 if ($tag{'type'} eq "tag") {
5212                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5213                 } else {
5214                         print "&nbsp;";
5215                 }
5216                 print "</td>\n" .
5217                       "<td class=\"link\">" . " | " .
5218                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5219                 if ($tag{'reftype'} eq "commit") {
5220                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5221                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5222                 } elsif ($tag{'reftype'} eq "blob") {
5223                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5224                 }
5225                 print "</td>\n" .
5226                       "</tr>";
5227         }
5228         if (defined $extra) {
5229                 print "<tr>\n" .
5230                       "<td colspan=\"5\">$extra</td>\n" .
5231                       "</tr>\n";
5232         }
5233         print "</table>\n";
5234 }
5235
5236 sub git_heads_body {
5237         # uses global variable $project
5238         my ($headlist, $head, $from, $to, $extra) = @_;
5239         $from = 0 unless defined $from;
5240         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5241
5242         print "<table class=\"heads\">\n";
5243         my $alternate = 1;
5244         for (my $i = $from; $i <= $to; $i++) {
5245                 my $entry = $headlist->[$i];
5246                 my %ref = %$entry;
5247                 my $curr = $ref{'id'} eq $head;
5248                 if ($alternate) {
5249                         print "<tr class=\"dark\">\n";
5250                 } else {
5251                         print "<tr class=\"light\">\n";
5252                 }
5253                 $alternate ^= 1;
5254                 print "<td><i>$ref{'age'}</i></td>\n" .
5255                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5256                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5257                                -class => "list name"},esc_html($ref{'name'})) .
5258                       "</td>\n" .
5259                       "<td class=\"link\">" .
5260                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5261                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5262                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
5263                       "</td>\n" .
5264                       "</tr>";
5265         }
5266         if (defined $extra) {
5267                 print "<tr>\n" .
5268                       "<td colspan=\"3\">$extra</td>\n" .
5269                       "</tr>\n";
5270         }
5271         print "</table>\n";
5272 }
5273
5274 sub git_search_grep_body {
5275         my ($commitlist, $from, $to, $extra) = @_;
5276         $from = 0 unless defined $from;
5277         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5278
5279         print "<table class=\"commit_search\">\n";
5280         my $alternate = 1;
5281         for (my $i = $from; $i <= $to; $i++) {
5282                 my %co = %{$commitlist->[$i]};
5283                 if (!%co) {
5284                         next;
5285                 }
5286                 my $commit = $co{'id'};
5287                 if ($alternate) {
5288                         print "<tr class=\"dark\">\n";
5289                 } else {
5290                         print "<tr class=\"light\">\n";
5291                 }
5292                 $alternate ^= 1;
5293                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5294                       format_author_html('td', \%co, 15, 5) .
5295                       "<td>" .
5296                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5297                                -class => "list subject"},
5298                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5299                 my $comment = $co{'comment'};
5300                 foreach my $line (@$comment) {
5301                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5302                                 my ($lead, $match, $trail) = ($1, $2, $3);
5303                                 $match = chop_str($match, 70, 5, 'center');
5304                                 my $contextlen = int((80 - length($match))/2);
5305                                 $contextlen = 30 if ($contextlen > 30);
5306                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5307                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5308
5309                                 $lead  = esc_html($lead);
5310                                 $match = esc_html($match);
5311                                 $trail = esc_html($trail);
5312
5313                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5314                         }
5315                 }
5316                 print "</td>\n" .
5317                       "<td class=\"link\">" .
5318                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5319                       " | " .
5320                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5321                       " | " .
5322                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5323                 print "</td>\n" .
5324                       "</tr>\n";
5325         }
5326         if (defined $extra) {
5327                 print "<tr>\n" .
5328                       "<td colspan=\"3\">$extra</td>\n" .
5329                       "</tr>\n";
5330         }
5331         print "</table>\n";
5332 }
5333
5334 ## ======================================================================
5335 ## ======================================================================
5336 ## actions
5337
5338 sub git_project_list {
5339         my $order = $input_params{'order'};
5340         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5341                 die_error(400, "Unknown order parameter");
5342         }
5343
5344         my @list = git_get_projects_list();
5345         if (!@list) {
5346                 die_error(404, "No projects found");
5347         }
5348
5349         git_header_html();
5350         if (defined $home_text && -f $home_text) {
5351                 print "<div class=\"index_include\">\n";
5352                 insert_file($home_text);
5353                 print "</div>\n";
5354         }
5355         print $cgi->startform(-method => "get") .
5356               "<p class=\"projsearch\">Search:\n" .
5357               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5358               "</p>" .
5359               $cgi->end_form() . "\n";
5360         git_project_list_body(\@list, $order);
5361         git_footer_html();
5362 }
5363
5364 sub git_forks {
5365         my $order = $input_params{'order'};
5366         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5367                 die_error(400, "Unknown order parameter");
5368         }
5369
5370         my @list = git_get_projects_list($project);
5371         if (!@list) {
5372                 die_error(404, "No forks found");
5373         }
5374
5375         git_header_html();
5376         git_print_page_nav('','');
5377         git_print_header_div('summary', "$project forks");
5378         git_project_list_body(\@list, $order);
5379         git_footer_html();
5380 }
5381
5382 sub git_project_index {
5383         my @projects = git_get_projects_list($project);
5384
5385         print $cgi->header(
5386                 -type => 'text/plain',
5387                 -charset => 'utf-8',
5388                 -content_disposition => 'inline; filename="index.aux"');
5389
5390         foreach my $pr (@projects) {
5391                 if (!exists $pr->{'owner'}) {
5392                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5393                 }
5394
5395                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5396                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5397                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5398                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5399                 $path  =~ s/ /\+/g;
5400                 $owner =~ s/ /\+/g;
5401
5402                 print "$path $owner\n";
5403         }
5404 }
5405
5406 sub git_summary {
5407         my $descr = git_get_project_description($project) || "none";
5408         my %co = parse_commit("HEAD");
5409         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5410         my $head = $co{'id'};
5411
5412         my $owner = git_get_project_owner($project);
5413
5414         my $refs = git_get_references();
5415         # These get_*_list functions return one more to allow us to see if
5416         # there are more ...
5417         my @taglist  = git_get_tags_list(16);
5418         my @headlist = git_get_heads_list(16);
5419         my @forklist;
5420         my $check_forks = gitweb_check_feature('forks');
5421
5422         if ($check_forks) {
5423                 @forklist = git_get_projects_list($project);
5424         }
5425
5426         git_header_html();
5427         git_print_page_nav('summary','', $head);
5428
5429         print "<div class=\"title\">&nbsp;</div>\n";
5430         print "<table class=\"projects_list\">\n" .
5431               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5432               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5433         if (defined $cd{'rfc2822'}) {
5434                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5435         }
5436
5437         # use per project git URL list in $projectroot/$project/cloneurl
5438         # or make project git URL from git base URL and project name
5439         my $url_tag = "URL";
5440         my @url_list = git_get_project_url_list($project);
5441         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5442         foreach my $git_url (@url_list) {
5443                 next unless $git_url;
5444                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5445                 $url_tag = "";
5446         }
5447
5448         # Tag cloud
5449         my $show_ctags = gitweb_check_feature('ctags');
5450         if ($show_ctags) {
5451                 my $ctags = git_get_project_ctags($project);
5452                 my $cloud = git_populate_project_tagcloud($ctags);
5453                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5454                 print "</td>\n<td>" unless %$ctags;
5455                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5456                 print "</td>\n<td>" if %$ctags;
5457                 print git_show_project_tagcloud($cloud, 48);
5458                 print "</td></tr>";
5459         }
5460
5461         print "</table>\n";
5462
5463         # If XSS prevention is on, we don't include README.html.
5464         # TODO: Allow a readme in some safe format.
5465         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5466                 print "<div class=\"title\">readme</div>\n" .
5467                       "<div class=\"readme\">\n";
5468                 insert_file("$projectroot/$project/README.html");
5469                 print "\n</div>\n"; # class="readme"
5470         }
5471
5472         # we need to request one more than 16 (0..15) to check if
5473         # those 16 are all
5474         my @commitlist = $head ? parse_commits($head, 17) : ();
5475         if (@commitlist) {
5476                 git_print_header_div('shortlog');
5477                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5478                                   $#commitlist <=  15 ? undef :
5479                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5480         }
5481
5482         if (@taglist) {
5483                 git_print_header_div('tags');
5484                 git_tags_body(\@taglist, 0, 15,
5485                               $#taglist <=  15 ? undef :
5486                               $cgi->a({-href => href(action=>"tags")}, "..."));
5487         }
5488
5489         if (@headlist) {
5490                 git_print_header_div('heads');
5491                 git_heads_body(\@headlist, $head, 0, 15,
5492                                $#headlist <= 15 ? undef :
5493                                $cgi->a({-href => href(action=>"heads")}, "..."));
5494         }
5495
5496         if (@forklist) {
5497                 git_print_header_div('forks');
5498                 git_project_list_body(\@forklist, 'age', 0, 15,
5499                                       $#forklist <= 15 ? undef :
5500                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5501                                       'no_header');
5502         }
5503
5504         git_footer_html();
5505 }
5506
5507 sub git_tag {
5508         my %tag = parse_tag($hash);
5509
5510         if (! %tag) {
5511                 die_error(404, "Unknown tag object");
5512         }
5513
5514         my $head = git_get_head_hash($project);
5515         git_header_html();
5516         git_print_page_nav('','', $head,undef,$head);
5517         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5518         print "<div class=\"title_text\">\n" .
5519               "<table class=\"object_header\">\n" .
5520               "<tr>\n" .
5521               "<td>object</td>\n" .
5522               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5523                                $tag{'object'}) . "</td>\n" .
5524               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5525                                               $tag{'type'}) . "</td>\n" .
5526               "</tr>\n";
5527         if (defined($tag{'author'})) {
5528                 git_print_authorship_rows(\%tag, 'author');
5529         }
5530         print "</table>\n\n" .
5531               "</div>\n";
5532         print "<div class=\"page_body\">";
5533         my $comment = $tag{'comment'};
5534         foreach my $line (@$comment) {
5535                 chomp $line;
5536                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5537         }
5538         print "</div>\n";
5539         git_footer_html();
5540 }
5541
5542 sub git_blame_common {
5543         my $format = shift || 'porcelain';
5544         if ($format eq 'porcelain' && $cgi->param('js') &&
5545             !$caching_enabled) {
5546                 $format = 'incremental';
5547                 $action = 'blame_incremental'; # for page title etc
5548         }
5549
5550         # permissions
5551         gitweb_check_feature('blame')
5552                 or die_error(403, "Blame view not allowed");
5553
5554         # error checking
5555         die_error(400, "No file name given") unless $file_name;
5556         $hash_base ||= git_get_head_hash($project);
5557         die_error(404, "Couldn't find base commit") unless $hash_base;
5558         my %co = parse_commit($hash_base)
5559                 or die_error(404, "Commit not found");
5560         my $ftype = "blob";
5561         if (!defined $hash) {
5562                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5563                         or die_error(404, "Error looking up file");
5564         } else {
5565                 $ftype = git_get_type($hash);
5566                 if ($ftype !~ "blob") {
5567                         die_error(400, "Object is not a blob");
5568                 }
5569         }
5570
5571         my $fd;
5572         if ($format eq 'incremental') {
5573                 # get file contents (as base)
5574                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5575                         or die_error(500, "Open git-cat-file failed");
5576         } elsif ($format eq 'data') {
5577                 # run git-blame --incremental
5578                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5579                         $hash_base, "--", $file_name
5580                         or die_error(500, "Open git-blame --incremental failed");
5581         } else {
5582                 # run git-blame --porcelain
5583                 open $fd, "-|", git_cmd(), "blame", '-p',
5584                         $hash_base, '--', $file_name
5585                         or die_error(500, "Open git-blame --porcelain failed");
5586         }
5587
5588         # incremental blame data returns early
5589         if ($format eq 'data') {
5590                 print $cgi->header(
5591                         -type=>"text/plain", -charset => "utf-8",
5592                         -status=> "200 OK");
5593                 local $| = 1; # output autoflush
5594                 print while <$fd>;
5595                 close $fd
5596                         or print "ERROR $!\n";
5597
5598                 print 'END';
5599                 if (!$caching_enabled &&
5600                     defined $t0 && gitweb_check_feature('timed')) {
5601                         print ' '.
5602                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5603                               ' '.$number_of_git_cmds;
5604                 }
5605                 print "\n";
5606
5607                 return;
5608         }
5609
5610         # page header
5611         git_header_html();
5612         my $formats_nav =
5613                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5614                         "blob") .
5615                 " | ";
5616         if ($format eq 'incremental') {
5617                 $formats_nav .=
5618                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5619                                 "blame") . " (non-incremental)";
5620         } elsif (!$caching_enabled) {
5621                 $formats_nav .=
5622                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5623                                 "blame") . " (incremental)";
5624         }
5625         $formats_nav .=
5626                 " | " .
5627                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5628                         "history") .
5629                 " | " .
5630                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5631                         "HEAD");
5632         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5633         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5634         git_print_page_path($file_name, $ftype, $hash_base);
5635
5636         # page body
5637         if ($format eq 'incremental') {
5638                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5639                       "This page requires JavaScript to run.\n Use ".
5640                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5641                               'this page').
5642                       " instead.\n".
5643                       "</b></center></div>\n</noscript>\n";
5644
5645                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5646         }
5647
5648         print qq!<div class="page_body">\n!;
5649         print qq!<div id="progress_info">... / ...</div>\n!
5650                 if ($format eq 'incremental');
5651         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5652               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5653               qq!<thead>\n!.
5654               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5655               qq!</thead>\n!.
5656               qq!<tbody>\n!;
5657
5658         my @rev_color = qw(light dark);
5659         my $num_colors = scalar(@rev_color);
5660         my $current_color = 0;
5661
5662         if ($format eq 'incremental') {
5663                 my $color_class = $rev_color[$current_color];
5664
5665                 #contents of a file
5666                 my $linenr = 0;
5667         LINE:
5668                 while (my $line = <$fd>) {
5669                         chomp $line;
5670                         $linenr++;
5671
5672                         print qq!<tr id="l$linenr" class="$color_class">!.
5673                               qq!<td class="sha1"><a href=""> </a></td>!.
5674                               qq!<td class="linenr">!.
5675                               qq!<a class="linenr" href="">$linenr</a></td>!;
5676                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5677                         print qq!</tr>\n!;
5678                 }
5679
5680         } else { # porcelain, i.e. ordinary blame
5681                 my %metainfo = (); # saves information about commits
5682
5683                 # blame data
5684         LINE:
5685                 while (my $line = <$fd>) {
5686                         chomp $line;
5687                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5688                         # no <lines in group> for subsequent lines in group of lines
5689                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5690                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5691                         if (!exists $metainfo{$full_rev}) {
5692                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5693                         }
5694                         my $meta = $metainfo{$full_rev};
5695                         my $data;
5696                         while ($data = <$fd>) {
5697                                 chomp $data;
5698                                 last if ($data =~ s/^\t//); # contents of line
5699                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5700                                         $meta->{$1} = $2 unless exists $meta->{$1};
5701                                 }
5702                                 if ($data =~ /^previous /) {
5703                                         $meta->{'nprevious'}++;
5704                                 }
5705                         }
5706                         my $short_rev = substr($full_rev, 0, 8);
5707                         my $author = $meta->{'author'};
5708                         my %date =
5709                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5710                         my $date = $date{'iso-tz'};
5711                         if ($group_size) {
5712                                 $current_color = ($current_color + 1) % $num_colors;
5713                         }
5714                         my $tr_class = $rev_color[$current_color];
5715                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5716                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5717                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5718                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5719                         if ($group_size) {
5720                                 print "<td class=\"sha1\"";
5721                                 print " title=\"". esc_html($author) . ", $date\"";
5722                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5723                                 print ">";
5724                                 print $cgi->a({-href => href(action=>"commit",
5725                                                              hash=>$full_rev,
5726                                                              file_name=>$file_name)},
5727                                               esc_html($short_rev));
5728                                 if ($group_size >= 2) {
5729                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5730                                         if (@author_initials) {
5731                                                 print "<br />" .
5732                                                       esc_html(join('', @author_initials));
5733                                                 #           or join('.', ...)
5734                                         }
5735                                 }
5736                                 print "</td>\n";
5737                         }
5738                         # 'previous' <sha1 of parent commit> <filename at commit>
5739                         if (exists $meta->{'previous'} &&
5740                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5741                                 $meta->{'parent'} = $1;
5742                                 $meta->{'file_parent'} = unquote($2);
5743                         }
5744                         my $linenr_commit =
5745                                 exists($meta->{'parent'}) ?
5746                                 $meta->{'parent'} : $full_rev;
5747                         my $linenr_filename =
5748                                 exists($meta->{'file_parent'}) ?
5749                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5750                         my $blamed = href(action => 'blame',
5751                                           file_name => $linenr_filename,
5752                                           hash_base => $linenr_commit);
5753                         print "<td class=\"linenr\">";
5754                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5755                                         -class => "linenr" },
5756                                       esc_html($lineno));
5757                         print "</td>";
5758                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5759                         print "</tr>\n";
5760                 } # end while
5761
5762         }
5763
5764         # footer
5765         print "</tbody>\n".
5766               "</table>\n"; # class="blame"
5767         print "</div>\n";   # class="blame_body"
5768         close $fd
5769                 or print "Reading blob failed\n";
5770
5771         git_footer_html();
5772 }
5773
5774 sub git_blame {
5775         git_blame_common();
5776 }
5777
5778 sub git_blame_incremental {
5779         git_blame_common(!$caching_enabled ? 'incremental' : undef);
5780 }
5781
5782 sub git_blame_data {
5783         git_blame_common('data');
5784 }
5785
5786 sub git_tags {
5787         my $head = git_get_head_hash($project);
5788         git_header_html();
5789         git_print_page_nav('','', $head,undef,$head);
5790         git_print_header_div('summary', $project);
5791
5792         my @tagslist = git_get_tags_list();
5793         if (@tagslist) {
5794                 git_tags_body(\@tagslist);
5795         }
5796         git_footer_html();
5797 }
5798
5799 sub git_heads {
5800         my $head = git_get_head_hash($project);
5801         git_header_html();
5802         git_print_page_nav('','', $head,undef,$head);
5803         git_print_header_div('summary', $project);
5804
5805         my @headslist = git_get_heads_list();
5806         if (@headslist) {
5807                 git_heads_body(\@headslist, $head);
5808         }
5809         git_footer_html();
5810 }
5811
5812 sub git_blob_plain {
5813         my $type = shift;
5814         my $expires;
5815
5816         if (!defined $hash) {
5817                 if (defined $file_name) {
5818                         my $base = $hash_base || git_get_head_hash($project);
5819                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5820                                 or die_error(404, "Cannot find file");
5821                 } else {
5822                         die_error(400, "No file name defined");
5823                 }
5824         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5825                 # blobs defined by non-textual hash id's can be cached
5826                 $expires = "+1d";
5827         }
5828
5829         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5830                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5831
5832         # content-type (can include charset)
5833         $type = blob_contenttype($fd, $file_name, $type);
5834
5835         # "save as" filename, even when no $file_name is given
5836         my $save_as = "$hash";
5837         if (defined $file_name) {
5838                 $save_as = $file_name;
5839         } elsif ($type =~ m/^text\//) {
5840                 $save_as .= '.txt';
5841         }
5842
5843         # With XSS prevention on, blobs of all types except a few known safe
5844         # ones are served with "Content-Disposition: attachment" to make sure
5845         # they don't run in our security domain.  For certain image types,
5846         # blob view writes an <img> tag referring to blob_plain view, and we
5847         # want to be sure not to break that by serving the image as an
5848         # attachment (though Firefox 3 doesn't seem to care).
5849         my $sandbox = $prevent_xss &&
5850                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5851
5852         print $cgi->header(
5853                 -type => $type,
5854                 -expires => $expires,
5855                 -content_disposition =>
5856                         ($sandbox ? 'attachment' : 'inline')
5857                         . '; filename="' . $save_as . '"');
5858         local $/ = undef;
5859         binmode STDOUT, ':raw';
5860         print <$fd>;
5861         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5862         close $fd;
5863 }
5864
5865 sub git_blob {
5866         my $expires;
5867
5868         if (!defined $hash) {
5869                 if (defined $file_name) {
5870                         my $base = $hash_base || git_get_head_hash($project);
5871                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5872                                 or die_error(404, "Cannot find file");
5873                 } else {
5874                         die_error(400, "No file name defined");
5875                 }
5876         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5877                 # blobs defined by non-textual hash id's can be cached
5878                 $expires = "+1d";
5879         }
5880
5881         my $have_blame = gitweb_check_feature('blame');
5882         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5883                 or die_error(500, "Couldn't cat $file_name, $hash");
5884         my $mimetype = blob_mimetype($fd, $file_name);
5885         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5886         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5887                 close $fd;
5888                 return git_blob_plain($mimetype);
5889         }
5890         # we can have blame only for text/* mimetype
5891         $have_blame &&= ($mimetype =~ m!^text/!);
5892
5893         my $highlight = gitweb_check_feature('highlight');
5894         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5895         $fd = run_highlighter($fd, $highlight, $syntax)
5896                 if $syntax;
5897
5898         git_header_html(undef, $expires);
5899         my $formats_nav = '';
5900         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5901                 if (defined $file_name) {
5902                         if ($have_blame) {
5903                                 $formats_nav .=
5904                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5905                                                 "blame") .
5906                                         " | ";
5907                         }
5908                         $formats_nav .=
5909                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5910                                         "history") .
5911                                 " | " .
5912                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5913                                         "raw") .
5914                                 " | " .
5915                                 $cgi->a({-href => href(action=>"blob",
5916                                                        hash_base=>"HEAD", file_name=>$file_name)},
5917                                         "HEAD");
5918                 } else {
5919                         $formats_nav .=
5920                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5921                                         "raw");
5922                 }
5923                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5924                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5925         } else {
5926                 print "<div class=\"page_nav\">\n" .
5927                       "<br/><br/></div>\n" .
5928                       "<div class=\"title\">$hash</div>\n";
5929         }
5930         git_print_page_path($file_name, "blob", $hash_base);
5931         print "<div class=\"page_body\">\n";
5932         if ($mimetype =~ m!^image/!) {
5933                 print qq!<img type="$mimetype"!;
5934                 if ($file_name) {
5935                         print qq! alt="$file_name" title="$file_name"!;
5936                 }
5937                 print qq! src="! .
5938                       href(action=>"blob_plain", hash=>$hash,
5939                            hash_base=>$hash_base, file_name=>$file_name) .
5940                       qq!" />\n!;
5941         } else {
5942                 my $nr;
5943                 while (my $line = <$fd>) {
5944                         chomp $line;
5945                         $nr++;
5946                         $line = untabify($line);
5947                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5948                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5949                 }
5950         }
5951         close $fd
5952                 or print "Reading blob failed.\n";
5953         print "</div>";
5954         git_footer_html();
5955 }
5956
5957 sub git_tree {
5958         if (!defined $hash_base) {
5959                 $hash_base = "HEAD";
5960         }
5961         if (!defined $hash) {
5962                 if (defined $file_name) {
5963                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5964                 } else {
5965                         $hash = $hash_base;
5966                 }
5967         }
5968         die_error(404, "No such tree") unless defined($hash);
5969
5970         my $show_sizes = gitweb_check_feature('show-sizes');
5971         my $have_blame = gitweb_check_feature('blame');
5972
5973         my @entries = ();
5974         {
5975                 local $/ = "\0";
5976                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5977                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5978                         or die_error(500, "Open git-ls-tree failed");
5979                 @entries = map { chomp; $_ } <$fd>;
5980                 close $fd
5981                         or die_error(404, "Reading tree failed");
5982         }
5983
5984         my $refs = git_get_references();
5985         my $ref = format_ref_marker($refs, $hash_base);
5986         git_header_html();
5987         my $basedir = '';
5988         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5989                 my @views_nav = ();
5990                 if (defined $file_name) {
5991                         push @views_nav,
5992                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5993                                         "history"),
5994                                 $cgi->a({-href => href(action=>"tree",
5995                                                        hash_base=>"HEAD", file_name=>$file_name)},
5996                                         "HEAD"),
5997                 }
5998                 my $snapshot_links = format_snapshot_links($hash);
5999                 if (defined $snapshot_links) {
6000                         # FIXME: Should be available when we have no hash base as well.
6001                         push @views_nav, $snapshot_links;
6002                 }
6003                 git_print_page_nav('tree','', $hash_base, undef, undef,
6004                                    join(' | ', @views_nav));
6005                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6006         } else {
6007                 undef $hash_base;
6008                 print "<div class=\"page_nav\">\n";
6009                 print "<br/><br/></div>\n";
6010                 print "<div class=\"title\">$hash</div>\n";
6011         }
6012         if (defined $file_name) {
6013                 $basedir = $file_name;
6014                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6015                         $basedir .= '/';
6016                 }
6017                 git_print_page_path($file_name, 'tree', $hash_base);
6018         }
6019         print "<div class=\"page_body\">\n";
6020         print "<table class=\"tree\">\n";
6021         my $alternate = 1;
6022         # '..' (top directory) link if possible
6023         if (defined $hash_base &&
6024             defined $file_name && $file_name =~ m![^/]+$!) {
6025                 if ($alternate) {
6026                         print "<tr class=\"dark\">\n";
6027                 } else {
6028                         print "<tr class=\"light\">\n";
6029                 }
6030                 $alternate ^= 1;
6031
6032                 my $up = $file_name;
6033                 $up =~ s!/?[^/]+$!!;
6034                 undef $up unless $up;
6035                 # based on git_print_tree_entry
6036                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6037                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6038                 print '<td class="list">';
6039                 print $cgi->a({-href => href(action=>"tree",
6040                                              hash_base=>$hash_base,
6041                                              file_name=>$up)},
6042                               "..");
6043                 print "</td>\n";
6044                 print "<td class=\"link\"></td>\n";
6045
6046                 print "</tr>\n";
6047         }
6048         foreach my $line (@entries) {
6049                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6050
6051                 if ($alternate) {
6052                         print "<tr class=\"dark\">\n";
6053                 } else {
6054                         print "<tr class=\"light\">\n";
6055                 }
6056                 $alternate ^= 1;
6057
6058                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6059
6060                 print "</tr>\n";
6061         }
6062         print "</table>\n" .
6063               "</div>";
6064         git_footer_html();
6065 }
6066
6067 sub snapshot_name {
6068         my ($project, $hash) = @_;
6069
6070         # path/to/project.git  -> project
6071         # path/to/project/.git -> project
6072         my $name = to_utf8($project);
6073         $name =~ s,([^/])/*\.git$,$1,;
6074         $name = basename($name);
6075         # sanitize name
6076         $name =~ s/[[:cntrl:]]/?/g;
6077
6078         my $ver = $hash;
6079         if ($hash =~ /^[0-9a-fA-F]+$/) {
6080                 # shorten SHA-1 hash
6081                 my $full_hash = git_get_full_hash($project, $hash);
6082                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6083                         $ver = git_get_short_hash($project, $hash);
6084                 }
6085         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6086                 # tags don't need shortened SHA-1 hash
6087                 $ver = $1;
6088         } else {
6089                 # branches and other need shortened SHA-1 hash
6090                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6091                         $ver = $1;
6092                 }
6093                 $ver .= '-' . git_get_short_hash($project, $hash);
6094         }
6095         # in case of hierarchical branch names
6096         $ver =~ s!/!.!g;
6097
6098         # name = project-version_string
6099         $name = "$name-$ver";
6100
6101         return wantarray ? ($name, $name) : $name;
6102 }
6103
6104 sub git_snapshot {
6105         my $format = $input_params{'snapshot_format'};
6106         if (!@snapshot_fmts) {
6107                 die_error(403, "Snapshots not allowed");
6108         }
6109         # default to first supported snapshot format
6110         $format ||= $snapshot_fmts[0];
6111         if ($format !~ m/^[a-z0-9]+$/) {
6112                 die_error(400, "Invalid snapshot format parameter");
6113         } elsif (!exists($known_snapshot_formats{$format})) {
6114                 die_error(400, "Unknown snapshot format");
6115         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6116                 die_error(403, "Snapshot format not allowed");
6117         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6118                 die_error(403, "Unsupported snapshot format");
6119         }
6120
6121         my $type = git_get_type("$hash^{}");
6122         if (!$type) {
6123                 die_error(404, 'Object does not exist');
6124         }  elsif ($type eq 'blob') {
6125                 die_error(400, 'Object is not a tree-ish');
6126         }
6127
6128         my ($name, $prefix) = snapshot_name($project, $hash);
6129         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6130         my $cmd = quote_command(
6131                 git_cmd(), 'archive',
6132                 "--format=$known_snapshot_formats{$format}{'format'}",
6133                 "--prefix=$prefix/", $hash);
6134         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6135                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6136         }
6137
6138         $filename =~ s/(["\\])/\\$1/g;
6139         print $cgi->header(
6140                 -type => $known_snapshot_formats{$format}{'type'},
6141                 -content_disposition => 'inline; filename="' . $filename . '"',
6142                 -status => '200 OK');
6143
6144         open my $fd, "-|", $cmd
6145                 or die_error(500, "Execute git-archive failed");
6146         binmode STDOUT, ':raw';
6147         print <$fd>;
6148         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6149         close $fd;
6150 }
6151
6152 sub git_log_generic {
6153         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6154
6155         my $head = git_get_head_hash($project);
6156         if (!defined $base) {
6157                 $base = $head;
6158         }
6159         if (!defined $page) {
6160                 $page = 0;
6161         }
6162         my $refs = git_get_references();
6163
6164         my $commit_hash = $base;
6165         if (defined $parent) {
6166                 $commit_hash = "$parent..$base";
6167         }
6168         my @commitlist =
6169                 parse_commits($commit_hash, 101, (100 * $page),
6170                               defined $file_name ? ($file_name, "--full-history") : ());
6171
6172         my $ftype;
6173         if (!defined $file_hash && defined $file_name) {
6174                 # some commits could have deleted file in question,
6175                 # and not have it in tree, but one of them has to have it
6176                 for (my $i = 0; $i < @commitlist; $i++) {
6177                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6178                         last if defined $file_hash;
6179                 }
6180         }
6181         if (defined $file_hash) {
6182                 $ftype = git_get_type($file_hash);
6183         }
6184         if (defined $file_name && !defined $ftype) {
6185                 die_error(500, "Unknown type of object");
6186         }
6187         my %co;
6188         if (defined $file_name) {
6189                 %co = parse_commit($base)
6190                         or die_error(404, "Unknown commit object");
6191         }
6192
6193
6194         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6195         my $next_link = '';
6196         if ($#commitlist >= 100) {
6197                 $next_link =
6198                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6199                                  -accesskey => "n", -title => "Alt-n"}, "next");
6200         }
6201         my $patch_max = gitweb_get_feature('patches');
6202         if ($patch_max && !defined $file_name) {
6203                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6204                         $paging_nav .= " &sdot; " .
6205                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6206                                         "patches");
6207                 }
6208         }
6209
6210         git_header_html();
6211         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6212         if (defined $file_name) {
6213                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6214         } else {
6215                 git_print_header_div('summary', $project)
6216         }
6217         git_print_page_path($file_name, $ftype, $hash_base)
6218                 if (defined $file_name);
6219
6220         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6221                      $file_name, $file_hash, $ftype);
6222
6223         git_footer_html();
6224 }
6225
6226 sub git_log {
6227         git_log_generic('log', \&git_log_body,
6228                         $hash, $hash_parent);
6229 }
6230
6231 sub git_commit {
6232         $hash ||= $hash_base || "HEAD";
6233         my %co = parse_commit($hash)
6234             or die_error(404, "Unknown commit object");
6235
6236         my $parent  = $co{'parent'};
6237         my $parents = $co{'parents'}; # listref
6238
6239         # we need to prepare $formats_nav before any parameter munging
6240         my $formats_nav;
6241         if (!defined $parent) {
6242                 # --root commitdiff
6243                 $formats_nav .= '(initial)';
6244         } elsif (@$parents == 1) {
6245                 # single parent commit
6246                 $formats_nav .=
6247                         '(parent: ' .
6248                         $cgi->a({-href => href(action=>"commit",
6249                                                hash=>$parent)},
6250                                 esc_html(substr($parent, 0, 7))) .
6251                         ')';
6252         } else {
6253                 # merge commit
6254                 $formats_nav .=
6255                         '(merge: ' .
6256                         join(' ', map {
6257                                 $cgi->a({-href => href(action=>"commit",
6258                                                        hash=>$_)},
6259                                         esc_html(substr($_, 0, 7)));
6260                         } @$parents ) .
6261                         ')';
6262         }
6263         if (gitweb_check_feature('patches') && @$parents <= 1) {
6264                 $formats_nav .= " | " .
6265                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6266                                 "patch");
6267         }
6268
6269         if (!defined $parent) {
6270                 $parent = "--root";
6271         }
6272         my @difftree;
6273         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6274                 @diff_opts,
6275                 (@$parents <= 1 ? $parent : '-c'),
6276                 $hash, "--"
6277                 or die_error(500, "Open git-diff-tree failed");
6278         @difftree = map { chomp; $_ } <$fd>;
6279         close $fd or die_error(404, "Reading git-diff-tree failed");
6280
6281         # non-textual hash id's can be cached
6282         my $expires;
6283         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6284                 $expires = "+1d";
6285         }
6286         my $refs = git_get_references();
6287         my $ref = format_ref_marker($refs, $co{'id'});
6288
6289         git_header_html(undef, $expires);
6290         git_print_page_nav('commit', '',
6291                            $hash, $co{'tree'}, $hash,
6292                            $formats_nav);
6293
6294         if (defined $co{'parent'}) {
6295                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6296         } else {
6297                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6298         }
6299         print "<div class=\"title_text\">\n" .
6300               "<table class=\"object_header\">\n";
6301         git_print_authorship_rows(\%co);
6302         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6303         print "<tr>" .
6304               "<td>tree</td>" .
6305               "<td class=\"sha1\">" .
6306               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6307                        class => "list"}, $co{'tree'}) .
6308               "</td>" .
6309               "<td class=\"link\">" .
6310               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6311                       "tree");
6312         my $snapshot_links = format_snapshot_links($hash);
6313         if (defined $snapshot_links) {
6314                 print " | " . $snapshot_links;
6315         }
6316         print "</td>" .
6317               "</tr>\n";
6318
6319         foreach my $par (@$parents) {
6320                 print "<tr>" .
6321                       "<td>parent</td>" .
6322                       "<td class=\"sha1\">" .
6323                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6324                                class => "list"}, $par) .
6325                       "</td>" .
6326                       "<td class=\"link\">" .
6327                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6328                       " | " .
6329                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6330                       "</td>" .
6331                       "</tr>\n";
6332         }
6333         print "</table>".
6334               "</div>\n";
6335
6336         print "<div class=\"page_body\">\n";
6337         git_print_log($co{'comment'});
6338         print "</div>\n";
6339
6340         git_difftree_body(\@difftree, $hash, @$parents);
6341
6342         git_footer_html();
6343 }
6344
6345 sub git_object {
6346         # object is defined by:
6347         # - hash or hash_base alone
6348         # - hash_base and file_name
6349         my $type;
6350
6351         # - hash or hash_base alone
6352         if ($hash || ($hash_base && !defined $file_name)) {
6353                 my $object_id = $hash || $hash_base;
6354
6355                 open my $fd, "-|", quote_command(
6356                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6357                         or die_error(404, "Object does not exist");
6358                 $type = <$fd>;
6359                 chomp $type;
6360                 close $fd
6361                         or die_error(404, "Object does not exist");
6362
6363         # - hash_base and file_name
6364         } elsif ($hash_base && defined $file_name) {
6365                 $file_name =~ s,/+$,,;
6366
6367                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6368                         or die_error(404, "Base object does not exist");
6369
6370                 # here errors should not hapen
6371                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6372                         or die_error(500, "Open git-ls-tree failed");
6373                 my $line = <$fd>;
6374                 close $fd;
6375
6376                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6377                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6378                         die_error(404, "File or directory for given base does not exist");
6379                 }
6380                 $type = $2;
6381                 $hash = $3;
6382         } else {
6383                 die_error(400, "Not enough information to find object");
6384         }
6385
6386         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6387                                           hash=>$hash, hash_base=>$hash_base,
6388                                           file_name=>$file_name),
6389                              -status => '302 Found');
6390 }
6391
6392 sub git_blobdiff {
6393         my $format = shift || 'html';
6394
6395         my $fd;
6396         my @difftree;
6397         my %diffinfo;
6398         my $expires;
6399
6400         # preparing $fd and %diffinfo for git_patchset_body
6401         # new style URI
6402         if (defined $hash_base && defined $hash_parent_base) {
6403                 if (defined $file_name) {
6404                         # read raw output
6405                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6406                                 $hash_parent_base, $hash_base,
6407                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6408                                 or die_error(500, "Open git-diff-tree failed");
6409                         @difftree = map { chomp; $_ } <$fd>;
6410                         close $fd
6411                                 or die_error(404, "Reading git-diff-tree failed");
6412                         @difftree
6413                                 or die_error(404, "Blob diff not found");
6414
6415                 } elsif (defined $hash &&
6416                          $hash =~ /[0-9a-fA-F]{40}/) {
6417                         # try to find filename from $hash
6418
6419                         # read filtered raw output
6420                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6421                                 $hash_parent_base, $hash_base, "--"
6422                                 or die_error(500, "Open git-diff-tree failed");
6423                         @difftree =
6424                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6425                                 # $hash == to_id
6426                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6427                                 map { chomp; $_ } <$fd>;
6428                         close $fd
6429                                 or die_error(404, "Reading git-diff-tree failed");
6430                         @difftree
6431                                 or die_error(404, "Blob diff not found");
6432
6433                 } else {
6434                         die_error(400, "Missing one of the blob diff parameters");
6435                 }
6436
6437                 if (@difftree > 1) {
6438                         die_error(400, "Ambiguous blob diff specification");
6439                 }
6440
6441                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6442                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6443                 $file_name   ||= $diffinfo{'to_file'};
6444
6445                 $hash_parent ||= $diffinfo{'from_id'};
6446                 $hash        ||= $diffinfo{'to_id'};
6447
6448                 # non-textual hash id's can be cached
6449                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6450                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6451                         $expires = '+1d';
6452                 }
6453
6454                 # open patch output
6455                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6456                         '-p', ($format eq 'html' ? "--full-index" : ()),
6457                         $hash_parent_base, $hash_base,
6458                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6459                         or die_error(500, "Open git-diff-tree failed");
6460         }
6461
6462         # old/legacy style URI -- not generated anymore since 1.4.3.
6463         if (!%diffinfo) {
6464                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6465         }
6466
6467         # header
6468         if ($format eq 'html') {
6469                 my $formats_nav =
6470                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6471                                 "raw");
6472                 git_header_html(undef, $expires);
6473                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6474                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6475                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6476                 } else {
6477                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6478                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6479                 }
6480                 if (defined $file_name) {
6481                         git_print_page_path($file_name, "blob", $hash_base);
6482                 } else {
6483                         print "<div class=\"page_path\"></div>\n";
6484                 }
6485
6486         } elsif ($format eq 'plain') {
6487                 print $cgi->header(
6488                         -type => 'text/plain',
6489                         -charset => 'utf-8',
6490                         -expires => $expires,
6491                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6492
6493                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6494
6495         } else {
6496                 die_error(400, "Unknown blobdiff format");
6497         }
6498
6499         # patch
6500         if ($format eq 'html') {
6501                 print "<div class=\"page_body\">\n";
6502
6503                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6504                 close $fd;
6505
6506                 print "</div>\n"; # class="page_body"
6507                 git_footer_html();
6508
6509         } else {
6510                 while (my $line = <$fd>) {
6511                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6512                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6513
6514                         print $line;
6515
6516                         last if $line =~ m!^\+\+\+!;
6517                 }
6518                 local $/ = undef;
6519                 print <$fd>;
6520                 close $fd;
6521         }
6522 }
6523
6524 sub git_blobdiff_plain {
6525         git_blobdiff('plain');
6526 }
6527
6528 sub git_commitdiff {
6529         my %params = @_;
6530         my $format = $params{-format} || 'html';
6531
6532         my ($patch_max) = gitweb_get_feature('patches');
6533         if ($format eq 'patch') {
6534                 die_error(403, "Patch view not allowed") unless $patch_max;
6535         }
6536
6537         $hash ||= $hash_base || "HEAD";
6538         my %co = parse_commit($hash)
6539             or die_error(404, "Unknown commit object");
6540
6541         # choose format for commitdiff for merge
6542         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6543                 $hash_parent = '--cc';
6544         }
6545         # we need to prepare $formats_nav before almost any parameter munging
6546         my $formats_nav;
6547         if ($format eq 'html') {
6548                 $formats_nav =
6549                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6550                                 "raw");
6551                 if ($patch_max && @{$co{'parents'}} <= 1) {
6552                         $formats_nav .= " | " .
6553                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6554                                         "patch");
6555                 }
6556
6557                 if (defined $hash_parent &&
6558                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6559                         # commitdiff with two commits given
6560                         my $hash_parent_short = $hash_parent;
6561                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6562                                 $hash_parent_short = substr($hash_parent, 0, 7);
6563                         }
6564                         $formats_nav .=
6565                                 ' (from';
6566                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6567                                 if ($co{'parents'}[$i] eq $hash_parent) {
6568                                         $formats_nav .= ' parent ' . ($i+1);
6569                                         last;
6570                                 }
6571                         }
6572                         $formats_nav .= ': ' .
6573                                 $cgi->a({-href => href(action=>"commitdiff",
6574                                                        hash=>$hash_parent)},
6575                                         esc_html($hash_parent_short)) .
6576                                 ')';
6577                 } elsif (!$co{'parent'}) {
6578                         # --root commitdiff
6579                         $formats_nav .= ' (initial)';
6580                 } elsif (scalar @{$co{'parents'}} == 1) {
6581                         # single parent commit
6582                         $formats_nav .=
6583                                 ' (parent: ' .
6584                                 $cgi->a({-href => href(action=>"commitdiff",
6585                                                        hash=>$co{'parent'})},
6586                                         esc_html(substr($co{'parent'}, 0, 7))) .
6587                                 ')';
6588                 } else {
6589                         # merge commit
6590                         if ($hash_parent eq '--cc') {
6591                                 $formats_nav .= ' | ' .
6592                                         $cgi->a({-href => href(action=>"commitdiff",
6593                                                                hash=>$hash, hash_parent=>'-c')},
6594                                                 'combined');
6595                         } else { # $hash_parent eq '-c'
6596                                 $formats_nav .= ' | ' .
6597                                         $cgi->a({-href => href(action=>"commitdiff",
6598                                                                hash=>$hash, hash_parent=>'--cc')},
6599                                                 'compact');
6600                         }
6601                         $formats_nav .=
6602                                 ' (merge: ' .
6603                                 join(' ', map {
6604                                         $cgi->a({-href => href(action=>"commitdiff",
6605                                                                hash=>$_)},
6606                                                 esc_html(substr($_, 0, 7)));
6607                                 } @{$co{'parents'}} ) .
6608                                 ')';
6609                 }
6610         }
6611
6612         my $hash_parent_param = $hash_parent;
6613         if (!defined $hash_parent_param) {
6614                 # --cc for multiple parents, --root for parentless
6615                 $hash_parent_param =
6616                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6617         }
6618
6619         # read commitdiff
6620         my $fd;
6621         my @difftree;
6622         if ($format eq 'html') {
6623                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6624                         "--no-commit-id", "--patch-with-raw", "--full-index",
6625                         $hash_parent_param, $hash, "--"
6626                         or die_error(500, "Open git-diff-tree failed");
6627
6628                 while (my $line = <$fd>) {
6629                         chomp $line;
6630                         # empty line ends raw part of diff-tree output
6631                         last unless $line;
6632                         push @difftree, scalar parse_difftree_raw_line($line);
6633                 }
6634
6635         } elsif ($format eq 'plain') {
6636                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6637                         '-p', $hash_parent_param, $hash, "--"
6638                         or die_error(500, "Open git-diff-tree failed");
6639         } elsif ($format eq 'patch') {
6640                 # For commit ranges, we limit the output to the number of
6641                 # patches specified in the 'patches' feature.
6642                 # For single commits, we limit the output to a single patch,
6643                 # diverging from the git-format-patch default.
6644                 my @commit_spec = ();
6645                 if ($hash_parent) {
6646                         if ($patch_max > 0) {
6647                                 push @commit_spec, "-$patch_max";
6648                         }
6649                         push @commit_spec, '-n', "$hash_parent..$hash";
6650                 } else {
6651                         if ($params{-single}) {
6652                                 push @commit_spec, '-1';
6653                         } else {
6654                                 if ($patch_max > 0) {
6655                                         push @commit_spec, "-$patch_max";
6656                                 }
6657                                 push @commit_spec, "-n";
6658                         }
6659                         push @commit_spec, '--root', $hash;
6660                 }
6661                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6662                         '--encoding=utf8', '--stdout', @commit_spec
6663                         or die_error(500, "Open git-format-patch failed");
6664         } else {
6665                 die_error(400, "Unknown commitdiff format");
6666         }
6667
6668         # non-textual hash id's can be cached
6669         my $expires;
6670         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6671                 $expires = "+1d";
6672         }
6673
6674         # write commit message
6675         if ($format eq 'html') {
6676                 my $refs = git_get_references();
6677                 my $ref = format_ref_marker($refs, $co{'id'});
6678
6679                 git_header_html(undef, $expires);
6680                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6681                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6682                 print "<div class=\"title_text\">\n" .
6683                       "<table class=\"object_header\">\n";
6684                 git_print_authorship_rows(\%co);
6685                 print "</table>".
6686                       "</div>\n";
6687                 print "<div class=\"page_body\">\n";
6688                 if (@{$co{'comment'}} > 1) {
6689                         print "<div class=\"log\">\n";
6690                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6691                         print "</div>\n"; # class="log"
6692                 }
6693
6694         } elsif ($format eq 'plain') {
6695                 my $refs = git_get_references("tags");
6696                 my $tagname = git_get_rev_name_tags($hash);
6697                 my $filename = basename($project) . "-$hash.patch";
6698
6699                 print $cgi->header(
6700                         -type => 'text/plain',
6701                         -charset => 'utf-8',
6702                         -expires => $expires,
6703                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6704                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6705                 print "From: " . to_utf8($co{'author'}) . "\n";
6706                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6707                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6708
6709                 print "X-Git-Tag: $tagname\n" if $tagname;
6710                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6711
6712                 foreach my $line (@{$co{'comment'}}) {
6713                         print to_utf8($line) . "\n";
6714                 }
6715                 print "---\n\n";
6716         } elsif ($format eq 'patch') {
6717                 my $filename = basename($project) . "-$hash.patch";
6718
6719                 print $cgi->header(
6720                         -type => 'text/plain',
6721                         -charset => 'utf-8',
6722                         -expires => $expires,
6723                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6724         }
6725
6726         # write patch
6727         if ($format eq 'html') {
6728                 my $use_parents = !defined $hash_parent ||
6729                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6730                 git_difftree_body(\@difftree, $hash,
6731                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6732                 print "<br/>\n";
6733
6734                 git_patchset_body($fd, \@difftree, $hash,
6735                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6736                 close $fd;
6737                 print "</div>\n"; # class="page_body"
6738                 git_footer_html();
6739
6740         } elsif ($format eq 'plain') {
6741                 local $/ = undef;
6742                 print <$fd>;
6743                 close $fd
6744                         or print "Reading git-diff-tree failed\n";
6745         } elsif ($format eq 'patch') {
6746                 local $/ = undef;
6747                 print <$fd>;
6748                 close $fd
6749                         or print "Reading git-format-patch failed\n";
6750         }
6751 }
6752
6753 sub git_commitdiff_plain {
6754         git_commitdiff(-format => 'plain');
6755 }
6756
6757 # format-patch-style patches
6758 sub git_patch {
6759         git_commitdiff(-format => 'patch', -single => 1);
6760 }
6761
6762 sub git_patches {
6763         git_commitdiff(-format => 'patch');
6764 }
6765
6766 sub git_history {
6767         git_log_generic('history', \&git_history_body,
6768                         $hash_base, $hash_parent_base,
6769                         $file_name, $hash);
6770 }
6771
6772 sub git_search {
6773         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6774         if (!defined $searchtext) {
6775                 die_error(400, "Text field is empty");
6776         }
6777         if (!defined $hash) {
6778                 $hash = git_get_head_hash($project);
6779         }
6780         my %co = parse_commit($hash);
6781         if (!%co) {
6782                 die_error(404, "Unknown commit object");
6783         }
6784         if (!defined $page) {
6785                 $page = 0;
6786         }
6787
6788         $searchtype ||= 'commit';
6789         if ($searchtype eq 'pickaxe') {
6790                 # pickaxe may take all resources of your box and run for several minutes
6791                 # with every query - so decide by yourself how public you make this feature
6792                 gitweb_check_feature('pickaxe')
6793                     or die_error(403, "Pickaxe is disabled");
6794         }
6795         if ($searchtype eq 'grep') {
6796                 gitweb_check_feature('grep')
6797                     or die_error(403, "Grep is disabled");
6798         }
6799
6800         git_header_html();
6801
6802         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6803                 my $greptype;
6804                 if ($searchtype eq 'commit') {
6805                         $greptype = "--grep=";
6806                 } elsif ($searchtype eq 'author') {
6807                         $greptype = "--author=";
6808                 } elsif ($searchtype eq 'committer') {
6809                         $greptype = "--committer=";
6810                 }
6811                 $greptype .= $searchtext;
6812                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6813                                                $greptype, '--regexp-ignore-case',
6814                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6815
6816                 my $paging_nav = '';
6817                 if ($page > 0) {
6818                         $paging_nav .=
6819                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6820                                                        searchtext=>$searchtext,
6821                                                        searchtype=>$searchtype)},
6822                                         "first");
6823                         $paging_nav .= " &sdot; " .
6824                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6825                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6826                 } else {
6827                         $paging_nav .= "first";
6828                         $paging_nav .= " &sdot; prev";
6829                 }
6830                 my $next_link = '';
6831                 if ($#commitlist >= 100) {
6832                         $next_link =
6833                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6834                                          -accesskey => "n", -title => "Alt-n"}, "next");
6835                         $paging_nav .= " &sdot; $next_link";
6836                 } else {
6837                         $paging_nav .= " &sdot; next";
6838                 }
6839
6840                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6841                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6842                 if ($page == 0 && !@commitlist) {
6843                         print "<p>No match.</p>\n";
6844                 } else {
6845                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6846                 }
6847         }
6848
6849         if ($searchtype eq 'pickaxe') {
6850                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6851                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6852
6853                 print "<table class=\"pickaxe search\">\n";
6854                 my $alternate = 1;
6855                 local $/ = "\n";
6856                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6857                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6858                         ($search_use_regexp ? '--pickaxe-regex' : ());
6859                 undef %co;
6860                 my @files;
6861                 while (my $line = <$fd>) {
6862                         chomp $line;
6863                         next unless $line;
6864
6865                         my %set = parse_difftree_raw_line($line);
6866                         if (defined $set{'commit'}) {
6867                                 # finish previous commit
6868                                 if (%co) {
6869                                         print "</td>\n" .
6870                                               "<td class=\"link\">" .
6871                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6872                                               " | " .
6873                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6874                                         print "</td>\n" .
6875                                               "</tr>\n";
6876                                 }
6877
6878                                 if ($alternate) {
6879                                         print "<tr class=\"dark\">\n";
6880                                 } else {
6881                                         print "<tr class=\"light\">\n";
6882                                 }
6883                                 $alternate ^= 1;
6884                                 %co = parse_commit($set{'commit'});
6885                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6886                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6887                                       "<td><i>$author</i></td>\n" .
6888                                       "<td>" .
6889                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6890                                               -class => "list subject"},
6891                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6892                         } elsif (defined $set{'to_id'}) {
6893                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6894
6895                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6896                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6897                                               -class => "list"},
6898                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6899                                       "<br/>\n";
6900                         }
6901                 }
6902                 close $fd;
6903
6904                 # finish last commit (warning: repetition!)
6905                 if (%co) {
6906                         print "</td>\n" .
6907                               "<td class=\"link\">" .
6908                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6909                               " | " .
6910                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6911                         print "</td>\n" .
6912                               "</tr>\n";
6913                 }
6914
6915                 print "</table>\n";
6916         }
6917
6918         if ($searchtype eq 'grep') {
6919                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6920                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6921
6922                 print "<table class=\"grep_search\">\n";
6923                 my $alternate = 1;
6924                 my $matches = 0;
6925                 local $/ = "\n";
6926                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6927                         $search_use_regexp ? ('-E', '-i') : '-F',
6928                         $searchtext, $co{'tree'};
6929                 my $lastfile = '';
6930                 while (my $line = <$fd>) {
6931                         chomp $line;
6932                         my ($file, $lno, $ltext, $binary);
6933                         last if ($matches++ > 1000);
6934                         if ($line =~ /^Binary file (.+) matches$/) {
6935                                 $file = $1;
6936                                 $binary = 1;
6937                         } else {
6938                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6939                         }
6940                         if ($file ne $lastfile) {
6941                                 $lastfile and print "</td></tr>\n";
6942                                 if ($alternate++) {
6943                                         print "<tr class=\"dark\">\n";
6944                                 } else {
6945                                         print "<tr class=\"light\">\n";
6946                                 }
6947                                 print "<td class=\"list\">".
6948                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6949                                                                file_name=>"$file"),
6950                                                 -class => "list"}, esc_path($file));
6951                                 print "</td><td>\n";
6952                                 $lastfile = $file;
6953                         }
6954                         if ($binary) {
6955                                 print "<div class=\"binary\">Binary file</div>\n";
6956                         } else {
6957                                 $ltext = untabify($ltext);
6958                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6959                                         $ltext = esc_html($1, -nbsp=>1);
6960                                         $ltext .= '<span class="match">';
6961                                         $ltext .= esc_html($2, -nbsp=>1);
6962                                         $ltext .= '</span>';
6963                                         $ltext .= esc_html($3, -nbsp=>1);
6964                                 } else {
6965                                         $ltext = esc_html($ltext, -nbsp=>1);
6966                                 }
6967                                 print "<div class=\"pre\">" .
6968                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6969                                                                file_name=>"$file").'#l'.$lno,
6970                                                 -class => "linenr"}, sprintf('%4i', $lno))
6971                                         . ' ' .  $ltext . "</div>\n";
6972                         }
6973                 }
6974                 if ($lastfile) {
6975                         print "</td></tr>\n";
6976                         if ($matches > 1000) {
6977                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6978                         }
6979                 } else {
6980                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6981                 }
6982                 close $fd;
6983
6984                 print "</table>\n";
6985         }
6986         git_footer_html();
6987 }
6988
6989 sub git_search_help {
6990         git_header_html();
6991         git_print_page_nav('','', $hash,$hash,$hash);
6992         print <<EOT;
6993 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6994 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6995 the pattern entered is recognized as the POSIX extended
6996 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6997 insensitive).</p>
6998 <dl>
6999 <dt><b>commit</b></dt>
7000 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7001 EOT
7002         my $have_grep = gitweb_check_feature('grep');
7003         if ($have_grep) {
7004                 print <<EOT;
7005 <dt><b>grep</b></dt>
7006 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7007     a different one) are searched for the given pattern. On large trees, this search can take
7008 a while and put some strain on the server, so please use it with some consideration. Note that
7009 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7010 case-sensitive.</dd>
7011 EOT
7012         }
7013         print <<EOT;
7014 <dt><b>author</b></dt>
7015 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7016 <dt><b>committer</b></dt>
7017 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7018 EOT
7019         my $have_pickaxe = gitweb_check_feature('pickaxe');
7020         if ($have_pickaxe) {
7021                 print <<EOT;
7022 <dt><b>pickaxe</b></dt>
7023 <dd>All commits that caused the string to appear or disappear from any file (changes that
7024 added, removed or "modified" the string) will be listed. This search can take a while and
7025 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7026 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7027 EOT
7028         }
7029         print "</dl>\n";
7030         git_footer_html();
7031 }
7032
7033 sub git_shortlog {
7034         git_log_generic('shortlog', \&git_shortlog_body,
7035                         $hash, $hash_parent);
7036 }
7037
7038 ## ......................................................................
7039 ## feeds (RSS, Atom; OPML)
7040
7041 sub git_feed {
7042         my $format = shift || 'atom';
7043         my $have_blame = gitweb_check_feature('blame');
7044
7045         # Atom: http://www.atomenabled.org/developers/syndication/
7046         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7047         if ($format ne 'rss' && $format ne 'atom') {
7048                 die_error(400, "Unknown web feed format");
7049         }
7050
7051         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7052         my $head = $hash || 'HEAD';
7053         my @commitlist = parse_commits($head, 150, 0, $file_name);
7054
7055         my %latest_commit;
7056         my %latest_date;
7057         my $content_type = "application/$format+xml";
7058         if (defined $cgi->http('HTTP_ACCEPT') &&
7059                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7060                 # browser (feed reader) prefers text/xml
7061                 $content_type = 'text/xml';
7062         }
7063         if (defined($commitlist[0])) {
7064                 %latest_commit = %{$commitlist[0]};
7065                 my $latest_epoch = $latest_commit{'committer_epoch'};
7066                 %latest_date   = parse_date($latest_epoch);
7067                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7068                 if (defined $if_modified) {
7069                         my $since;
7070                         if (eval { require HTTP::Date; 1; }) {
7071                                 $since = HTTP::Date::str2time($if_modified);
7072                         } elsif (eval { require Time::ParseDate; 1; }) {
7073                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7074                         }
7075                         if (defined $since && $latest_epoch <= $since) {
7076                                 print $cgi->header(
7077                                         -type => $content_type,
7078                                         -charset => 'utf-8',
7079                                         -last_modified => $latest_date{'rfc2822'},
7080                                         -status => '304 Not Modified');
7081                                 return;
7082                         }
7083                 }
7084                 print $cgi->header(
7085                         -type => $content_type,
7086                         -charset => 'utf-8',
7087                         -last_modified => $latest_date{'rfc2822'});
7088         } else {
7089                 print $cgi->header(
7090                         -type => $content_type,
7091                         -charset => 'utf-8');
7092         }
7093
7094         # Optimization: skip generating the body if client asks only
7095         # for Last-Modified date.
7096         return if ($cgi->request_method() eq 'HEAD');
7097
7098         # header variables
7099         my $title = "$site_name - $project/$action";
7100         my $feed_type = 'log';
7101         if (defined $hash) {
7102                 $title .= " - '$hash'";
7103                 $feed_type = 'branch log';
7104                 if (defined $file_name) {
7105                         $title .= " :: $file_name";
7106                         $feed_type = 'history';
7107                 }
7108         } elsif (defined $file_name) {
7109                 $title .= " - $file_name";
7110                 $feed_type = 'history';
7111         }
7112         $title .= " $feed_type";
7113         my $descr = git_get_project_description($project);
7114         if (defined $descr) {
7115                 $descr = esc_html($descr);
7116         } else {
7117                 $descr = "$project " .
7118                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7119                          " feed";
7120         }
7121         my $owner = git_get_project_owner($project);
7122         $owner = esc_html($owner);
7123
7124         #header
7125         my $alt_url;
7126         if (defined $file_name) {
7127                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7128         } elsif (defined $hash) {
7129                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7130         } else {
7131                 $alt_url = href(-full=>1, action=>"summary");
7132         }
7133         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7134         if ($format eq 'rss') {
7135                 print <<XML;
7136 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7137 <channel>
7138 XML
7139                 print "<title>$title</title>\n" .
7140                       "<link>$alt_url</link>\n" .
7141                       "<description>$descr</description>\n" .
7142                       "<language>en</language>\n" .
7143                       # project owner is responsible for 'editorial' content
7144                       "<managingEditor>$owner</managingEditor>\n";
7145                 if (defined $logo || defined $favicon) {
7146                         # prefer the logo to the favicon, since RSS
7147                         # doesn't allow both
7148                         my $img = esc_url($logo || $favicon);
7149                         print "<image>\n" .
7150                               "<url>$img</url>\n" .
7151                               "<title>$title</title>\n" .
7152                               "<link>$alt_url</link>\n" .
7153                               "</image>\n";
7154                 }
7155                 if (%latest_date) {
7156                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7157                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7158                 }
7159                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7160         } elsif ($format eq 'atom') {
7161                 print <<XML;
7162 <feed xmlns="http://www.w3.org/2005/Atom">
7163 XML
7164                 print "<title>$title</title>\n" .
7165                       "<subtitle>$descr</subtitle>\n" .
7166                       '<link rel="alternate" type="text/html" href="' .
7167                       $alt_url . '" />' . "\n" .
7168                       '<link rel="self" type="' . $content_type . '" href="' .
7169                       $cgi->self_url() . '" />' . "\n" .
7170                       "<id>" . href(-full=>1) . "</id>\n" .
7171                       # use project owner for feed author
7172                       "<author><name>$owner</name></author>\n";
7173                 if (defined $favicon) {
7174                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7175                 }
7176                 if (defined $logo_url) {
7177                         # not twice as wide as tall: 72 x 27 pixels
7178                         print "<logo>" . esc_url($logo) . "</logo>\n";
7179                 }
7180                 if (! %latest_date) {
7181                         # dummy date to keep the feed valid until commits trickle in:
7182                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7183                 } else {
7184                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7185                 }
7186                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7187         }
7188
7189         # contents
7190         for (my $i = 0; $i <= $#commitlist; $i++) {
7191                 my %co = %{$commitlist[$i]};
7192                 my $commit = $co{'id'};
7193                 # we read 150, we always show 30 and the ones more recent than 48 hours
7194                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7195                         last;
7196                 }
7197                 my %cd = parse_date($co{'author_epoch'});
7198
7199                 # get list of changed files
7200                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7201                         $co{'parent'} || "--root",
7202                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7203                         or next;
7204                 my @difftree = map { chomp; $_ } <$fd>;
7205                 close $fd
7206                         or next;
7207
7208                 # print element (entry, item)
7209                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7210                 if ($format eq 'rss') {
7211                         print "<item>\n" .
7212                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7213                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7214                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7215                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7216                               "<link>$co_url</link>\n" .
7217                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7218                               "<content:encoded>" .
7219                               "<![CDATA[\n";
7220                 } elsif ($format eq 'atom') {
7221                         print "<entry>\n" .
7222                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7223                               "<updated>$cd{'iso-8601'}</updated>\n" .
7224                               "<author>\n" .
7225                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7226                         if ($co{'author_email'}) {
7227                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7228                         }
7229                         print "</author>\n" .
7230                               # use committer for contributor
7231                               "<contributor>\n" .
7232                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7233                         if ($co{'committer_email'}) {
7234                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7235                         }
7236                         print "</contributor>\n" .
7237                               "<published>$cd{'iso-8601'}</published>\n" .
7238                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7239                               "<id>$co_url</id>\n" .
7240                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7241                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7242                 }
7243                 my $comment = $co{'comment'};
7244                 print "<pre>\n";
7245                 foreach my $line (@$comment) {
7246                         $line = esc_html($line);
7247                         print "$line\n";
7248                 }
7249                 print "</pre><ul>\n";
7250                 foreach my $difftree_line (@difftree) {
7251                         my %difftree = parse_difftree_raw_line($difftree_line);
7252                         next if !$difftree{'from_id'};
7253
7254                         my $file = $difftree{'file'} || $difftree{'to_file'};
7255
7256                         print "<li>" .
7257                               "[" .
7258                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7259                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7260                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7261                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7262                                       -title => "diff"}, 'D');
7263                         if ($have_blame) {
7264                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7265                                                              file_name=>$file, hash_base=>$commit),
7266                                               -title => "blame"}, 'B');
7267                         }
7268                         # if this is not a feed of a file history
7269                         if (!defined $file_name || $file_name ne $file) {
7270                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7271                                                              file_name=>$file, hash=>$commit),
7272                                               -title => "history"}, 'H');
7273                         }
7274                         $file = esc_path($file);
7275                         print "] ".
7276                               "$file</li>\n";
7277                 }
7278                 if ($format eq 'rss') {
7279                         print "</ul>]]>\n" .
7280                               "</content:encoded>\n" .
7281                               "</item>\n";
7282                 } elsif ($format eq 'atom') {
7283                         print "</ul>\n</div>\n" .
7284                               "</content>\n" .
7285                               "</entry>\n";
7286                 }
7287         }
7288
7289         # end of feed
7290         if ($format eq 'rss') {
7291                 print "</channel>\n</rss>\n";
7292         } elsif ($format eq 'atom') {
7293                 print "</feed>\n";
7294         }
7295 }
7296
7297 sub git_rss {
7298         git_feed('rss');
7299 }
7300
7301 sub git_atom {
7302         git_feed('atom');
7303 }
7304
7305 sub git_opml {
7306         my @list = git_get_projects_list();
7307
7308         print $cgi->header(
7309                 -type => 'text/xml',
7310                 -charset => 'utf-8',
7311                 -content_disposition => 'inline; filename="opml.xml"');
7312
7313         print <<XML;
7314 <?xml version="1.0" encoding="utf-8"?>
7315 <opml version="1.0">
7316 <head>
7317   <title>$site_name OPML Export</title>
7318 </head>
7319 <body>
7320 <outline text="git RSS feeds">
7321 XML
7322
7323         foreach my $pr (@list) {
7324                 my %proj = %$pr;
7325                 my $head = git_get_head_hash($proj{'path'});
7326                 if (!defined $head) {
7327                         next;
7328                 }
7329                 $git_dir = "$projectroot/$proj{'path'}";
7330                 my %co = parse_commit($head);
7331                 if (!%co) {
7332                         next;
7333                 }
7334
7335                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7336                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7337                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7338                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7339         }
7340         print <<XML;
7341 </outline>
7342 </body>
7343 </opml>
7344 XML
7345 }