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         # This enables/disables using 'generating_info' subroutine by process
 362         # generating data, when not too stale data is not available (data is then
 363         # generated in background).  Because git_generating_data_html() includes
 364         # initial delay (of 1 second by default), and we can assume that die_error
 365         # finishes within this time, then generating error pages should be safe
 366         # from infinite "Generating page..." loop.
 367         'generating_info_is_safe' => 1,
 368
 369         # How to handle runtime errors occurring during cache gets and cache
 370         # sets.  Options are:
 371         #  * "die" (the default) - call die() with an appropriate message
 372         #  * "warn" - call warn() with an appropriate message
 373         #  * "ignore" - do nothing
 374         #  * <coderef> - call this code reference with an appropriate message
 375         # Note that gitweb catches 'die <message>' via custom handle_errors_html
 376         # handler, set via set_message() from CGI::Carp.  'warn <message>' are
 377         # written to web server logs.
 378         #
 379         # The default is to use cache_error_handler, which wraps die_error.
 380         # Only first argument passed to cache_error_handler is used (c.f. CHI)
 381         'on_error' => \&cache_error_handler,
 382 );
 383 # You define site-wide options for "Generating..." page (if enabled) here
 384 # (which means that $cache_options{'generating_info'} is set to coderef);
 385 # override them with $GITWEB_CONFIG as necessary.
 386 our %generating_options = (
 387         # The delay before displaying "Generating..." page, in seconds.  It is
 388         # intended for "Generating..." page to be shown only when really needed.
 389         'startup_delay' => 1,
 390         # The time between generating new piece of output to prevent from
 391         # redirection before data is ready, i.e. time between printing each
 392         # dot in activity indicator / progress info, in seconds.
 393         'print_interval' => 2,
 394         # Maximum time "Generating..." page would be present, waiting for data,
 395         # before unconditional redirect, in seconds.
 396         'timeout' => $cache_options{'expires_min'},
 397 );
 398 # Set to _initialized_ instance of GitwebCache::Capture compatibile capturing
 399 # engine, i.e. one implementing ->new() constructor, and ->capture($code)
 400 # method.  If unset (default), the GitwebCache::Capture::Simple would be used.
 401 our $capture;
 402
 403 # You define site-wide feature defaults here; override them with
 404 # $GITWEB_CONFIG as necessary.
 405 our %feature = (
 406         # feature => {
 407         #       'sub' => feature-sub (subroutine),
 408         #       'override' => allow-override (boolean),
 409         #       'default' => [ default options...] (array reference)}
 410         #
 411         # if feature is overridable (it means that allow-override has true value),
 412         # then feature-sub will be called with default options as parameters;
 413         # return value of feature-sub indicates if to enable specified feature
 414         #
 415         # if there is no 'sub' key (no feature-sub), then feature cannot be
 416         # overridden
 417         #
 418         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 419         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 420         # is enabled
 421
 422         # Enable the 'blame' blob view, showing the last commit that modified
 423         # each line in the file. This can be very CPU-intensive.
 424
 425         # To enable system wide have in $GITWEB_CONFIG
 426         # $feature{'blame'}{'default'} = [1];
 427         # To have project specific config enable override in $GITWEB_CONFIG
 428         # $feature{'blame'}{'override'} = 1;
 429         # and in project config gitweb.blame = 0|1;
 430         'blame' => {
 431                 'sub' => sub { feature_bool('blame', @_) },
 432                 'override' => 0,
 433                 'default' => [0]},
 434
 435         # Enable the 'snapshot' link, providing a compressed archive of any
 436         # tree. This can potentially generate high traffic if you have large
 437         # project.
 438
 439         # Value is a list of formats defined in %known_snapshot_formats that
 440         # you wish to offer.
 441         # To disable system wide have in $GITWEB_CONFIG
 442         # $feature{'snapshot'}{'default'} = [];
 443         # To have project specific config enable override in $GITWEB_CONFIG
 444         # $feature{'snapshot'}{'override'} = 1;
 445         # and in project config, a comma-separated list of formats or "none"
 446         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 447         'snapshot' => {
 448                 'sub' => \&feature_snapshot,
 449                 'override' => 0,
 450                 'default' => ['tgz']},
 451
 452         # Enable text search, which will list the commits which match author,
 453         # committer or commit text to a given string.  Enabled by default.
 454         # Project specific override is not supported.
 455         'search' => {
 456                 'override' => 0,
 457                 'default' => [1]},
 458
 459         # Enable grep search, which will list the files in currently selected
 460         # tree containing the given string. Enabled by default. This can be
 461         # potentially CPU-intensive, of course.
 462
 463         # To enable system wide have in $GITWEB_CONFIG
 464         # $feature{'grep'}{'default'} = [1];
 465         # To have project specific config enable override in $GITWEB_CONFIG
 466         # $feature{'grep'}{'override'} = 1;
 467         # and in project config gitweb.grep = 0|1;
 468         'grep' => {
 469                 'sub' => sub { feature_bool('grep', @_) },
 470                 'override' => 0,
 471                 'default' => [1]},
 472
 473         # Enable the pickaxe search, which will list the commits that modified
 474         # a given string in a file. This can be practical and quite faster
 475         # alternative to 'blame', but still potentially CPU-intensive.
 476
 477         # To enable system wide have in $GITWEB_CONFIG
 478         # $feature{'pickaxe'}{'default'} = [1];
 479         # To have project specific config enable override in $GITWEB_CONFIG
 480         # $feature{'pickaxe'}{'override'} = 1;
 481         # and in project config gitweb.pickaxe = 0|1;
 482         'pickaxe' => {
 483                 'sub' => sub { feature_bool('pickaxe', @_) },
 484                 'override' => 0,
 485                 'default' => [1]},
 486
 487         # Enable showing size of blobs in a 'tree' view, in a separate
 488         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 489
 490         # To disable system wide have in $GITWEB_CONFIG
 491         # $feature{'show-sizes'}{'default'} = [0];
 492         # To have project specific config enable override in $GITWEB_CONFIG
 493         # $feature{'show-sizes'}{'override'} = 1;
 494         # and in project config gitweb.showsizes = 0|1;
 495         'show-sizes' => {
 496                 'sub' => sub { feature_bool('showsizes', @_) },
 497                 'override' => 0,
 498                 'default' => [1]},
 499
 500         # Make gitweb use an alternative format of the URLs which can be
 501         # more readable and natural-looking: project name is embedded
 502         # directly in the path and the query string contains other
 503         # auxiliary information. All gitweb installations recognize
 504         # URL in either format; this configures in which formats gitweb
 505         # generates links.
 506
 507         # To enable system wide have in $GITWEB_CONFIG
 508         # $feature{'pathinfo'}{'default'} = [1];
 509         # Project specific override is not supported.
 510
 511         # Note that you will need to change the default location of CSS,
 512         # favicon, logo and possibly other files to an absolute URL. Also,
 513         # if gitweb.cgi serves as your indexfile, you will need to force
 514         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 515         'pathinfo' => {
 516                 'override' => 0,
 517                 'default' => [0]},
 518
 519         # Make gitweb consider projects in project root subdirectories
 520         # to be forks of existing projects. Given project $projname.git,
 521         # projects matching $projname/*.git will not be shown in the main
 522         # projects list, instead a '+' mark will be added to $projname
 523         # there and a 'forks' view will be enabled for the project, listing
 524         # all the forks. If project list is taken from a file, forks have
 525         # to be listed after the main project.
 526
 527         # To enable system wide have in $GITWEB_CONFIG
 528         # $feature{'forks'}{'default'} = [1];
 529         # Project specific override is not supported.
 530         'forks' => {
 531                 'override' => 0,
 532                 'default' => [0]},
 533
 534         # Insert custom links to the action bar of all project pages.
 535         # This enables you mainly to link to third-party scripts integrating
 536         # into gitweb; e.g. git-browser for graphical history representation
 537         # or custom web-based repository administration interface.
 538
 539         # The 'default' value consists of a list of triplets in the form
 540         # (label, link, position) where position is the label after which
 541         # to insert the link and link is a format string where %n expands
 542         # to the project name, %f to the project path within the filesystem,
 543         # %h to the current hash (h gitweb parameter) and %b to the current
 544         # hash base (hb gitweb parameter); %% expands to %.
 545
 546         # To enable system wide have in $GITWEB_CONFIG e.g.
 547         # $feature{'actions'}{'default'} = [('graphiclog',
 548         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 549         # Project specific override is not supported.
 550         'actions' => {
 551                 'override' => 0,
 552                 'default' => []},
 553
 554         # Allow gitweb scan project content tags described in ctags/
 555         # of project repository, and display the popular Web 2.0-ish
 556         # "tag cloud" near the project list. Note that this is something
 557         # COMPLETELY different from the normal Git tags.
 558
 559         # gitweb by itself can show existing tags, but it does not handle
 560         # tagging itself; you need an external application for that.
 561         # For an example script, check Girocco's cgi/tagproj.cgi.
 562         # You may want to install the HTML::TagCloud Perl module to get
 563         # a pretty tag cloud instead of just a list of tags.
 564
 565         # To enable system wide have in $GITWEB_CONFIG
 566         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 567         # Project specific override is not supported.
 568         'ctags' => {
 569                 'override' => 0,
 570                 'default' => [0]},
 571
 572         # The maximum number of patches in a patchset generated in patch
 573         # view. Set this to 0 or undef to disable patch view, or to a
 574         # negative number to remove any limit.
 575
 576         # To disable system wide have in $GITWEB_CONFIG
 577         # $feature{'patches'}{'default'} = [0];
 578         # To have project specific config enable override in $GITWEB_CONFIG
 579         # $feature{'patches'}{'override'} = 1;
 580         # and in project config gitweb.patches = 0|n;
 581         # where n is the maximum number of patches allowed in a patchset.
 582         'patches' => {
 583                 'sub' => \&feature_patches,
 584                 'override' => 0,
 585                 'default' => [16]},
 586
 587         # Avatar support. When this feature is enabled, views such as
 588         # shortlog or commit will display an avatar associated with
 589         # the email of the committer(s) and/or author(s).
 590
 591         # Currently available providers are gravatar and picon.
 592         # If an unknown provider is specified, the feature is disabled.
 593
 594         # Gravatar depends on Digest::MD5.
 595         # Picon currently relies on the indiana.edu database.
 596
 597         # To enable system wide have in $GITWEB_CONFIG
 598         # $feature{'avatar'}{'default'} = ['<provider>'];
 599         # where <provider> is either gravatar or picon.
 600         # To have project specific config enable override in $GITWEB_CONFIG
 601         # $feature{'avatar'}{'override'} = 1;
 602         # and in project config gitweb.avatar = <provider>;
 603         'avatar' => {
 604                 'sub' => \&feature_avatar,
 605                 'override' => 0,
 606                 'default' => ['']},
 607
 608         # Enable displaying how much time and how many git commands
 609         # it took to generate and display page.  Disabled by default.
 610         # Project specific override is not supported.
 611         'timed' => {
 612                 'override' => 0,
 613                 'default' => [0]},
 614
 615         # Enable turning some links into links to actions which require
 616         # JavaScript to run (like 'blame_incremental').  Not enabled by
 617         # default.  Project specific override is currently not supported.
 618         'javascript-actions' => {
 619                 'override' => 0,
 620                 'default' => [0]},
 621
 622         # Syntax highlighting support. This is based on Daniel Svensson's
 623         # and Sham Chukoury's work in gitweb-xmms2.git.
 624         # It requires the 'highlight' program present in $PATH,
 625         # and therefore is disabled by default.
 626
 627         # To enable system wide have in $GITWEB_CONFIG
 628         # $feature{'highlight'}{'default'} = [1];
 629
 630         'highlight' => {
 631                 'sub' => sub { feature_bool('highlight', @_) },
 632                 'override' => 0,
 633                 'default' => [0]},
 634 );
 635
 636 sub gitweb_get_feature {
 637         my ($name) = @_;
 638         return unless exists $feature{$name};
 639         my ($sub, $override, @defaults) = (
 640                 $feature{$name}{'sub'},
 641                 $feature{$name}{'override'},
 642                 @{$feature{$name}{'default'}});
 643         # project specific override is possible only if we have project
 644         our $git_dir; # global variable, declared later
 645         if (!$override || !defined $git_dir) {
 646                 return @defaults;
 647         }
 648         if (!defined $sub) {
 649                 warn "feature $name is not overridable";
 650                 return @defaults;
 651         }
 652         return $sub->(@defaults);
 653 }
 654
 655 # A wrapper to check if a given feature is enabled.
 656 # With this, you can say
 657 #
 658 #   my $bool_feat = gitweb_check_feature('bool_feat');
 659 #   gitweb_check_feature('bool_feat') or somecode;
 660 #
 661 # instead of
 662 #
 663 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 664 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 665 #
 666 sub gitweb_check_feature {
 667         return (gitweb_get_feature(@_))[0];
 668 }
 669
 670
 671 sub feature_bool {
 672         my $key = shift;
 673         my ($val) = git_get_project_config($key, '--bool');
 674
 675         if (!defined $val) {
 676                 return ($_[0]);
 677         } elsif ($val eq 'true') {
 678                 return (1);
 679         } elsif ($val eq 'false') {
 680                 return (0);
 681         }
 682 }
 683
 684 sub feature_snapshot {
 685         my (@fmts) = @_;
 686
 687         my ($val) = git_get_project_config('snapshot');
 688
 689         if ($val) {
 690                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 691         }
 692
 693         return @fmts;
 694 }
 695
 696 sub feature_patches {
 697         my @val = (git_get_project_config('patches', '--int'));
 698
 699         if (@val) {
 700                 return @val;
 701         }
 702
 703         return ($_[0]);
 704 }
 705
 706 sub feature_avatar {
 707         my @val = (git_get_project_config('avatar'));
 708
 709         return @val ? @val : @_;
 710 }
 711
 712 # checking HEAD file with -e is fragile if the repository was
 713 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 714 # and then pruned.
 715 sub check_head_link {
 716         my ($dir) = @_;
 717         my $headfile = "$dir/HEAD";
 718         return ((-e $headfile) ||
 719                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 720 }
 721
 722 sub check_export_ok {
 723         my ($dir) = @_;
 724         return (check_head_link($dir) &&
 725                 (!$export_ok || -e "$dir/$export_ok") &&
 726                 (!$export_auth_hook || $export_auth_hook->($dir)));
 727 }
 728
 729 # process alternate names for backward compatibility
 730 # filter out unsupported (unknown) snapshot formats
 731 sub filter_snapshot_fmts {
 732         my @fmts = @_;
 733
 734         @fmts = map {
 735                 exists $known_snapshot_format_aliases{$_} ?
 736                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 737         @fmts = grep {
 738                 exists $known_snapshot_formats{$_} &&
 739                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 740 }
 741
 742 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 743 sub evaluate_gitweb_config {
 744         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 745         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 746         # die if there are errors parsing config file
 747         if (-e $GITWEB_CONFIG) {
 748                 do $GITWEB_CONFIG;
 749                 die $@ if $@;
 750         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 751                 do $GITWEB_CONFIG_SYSTEM;
 752                 die $@ if $@;
 753         }
 754 }
 755
 756 # Get loadavg of system, to compare against $maxload.
 757 # Currently it requires '/proc/loadavg' present to get loadavg;
 758 # if it is not present it returns 0, which means no load checking.
 759 sub get_loadavg {
 760         if( -e '/proc/loadavg' ){
 761                 open my $fd, '<', '/proc/loadavg'
 762                         or return 0;
 763                 my @load = split(/\s+/, scalar <$fd>);
 764                 close $fd;
 765
 766                 # The first three columns measure CPU and IO utilization of the last one,
 767                 # five, and 10 minute periods.  The fourth column shows the number of
 768                 # currently running processes and the total number of processes in the m/n
 769                 # format.  The last column displays the last process ID used.
 770                 return $load[0] || 0;
 771         }
 772         # additional checks for load average should go here for things that don't export
 773         # /proc/loadavg
 774
 775         return 0;
 776 }
 777
 778 # version of the core git binary
 779 our $git_version;
 780 sub evaluate_git_version {
 781         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 782         $number_of_git_cmds++;
 783 }
 784
 785 sub check_loadavg {
 786         if (defined $maxload && get_loadavg() > $maxload) {
 787                 die_error(503, "The load average on the server is too high");
 788         }
 789 }
 790
 791 # ======================================================================
 792 # input validation and dispatch
 793
 794 # input parameters can be collected from a variety of sources (presently, CGI
 795 # and PATH_INFO), so we define an %input_params hash that collects them all
 796 # together during validation: this allows subsequent uses (e.g. href()) to be
 797 # agnostic of the parameter origin
 798
 799 our %input_params = ();
 800
 801 # input parameters are stored with the long parameter name as key. This will
 802 # also be used in the href subroutine to convert parameters to their CGI
 803 # equivalent, and since the href() usage is the most frequent one, we store
 804 # the name -> CGI key mapping here, instead of the reverse.
 805 #
 806 # XXX: Warning: If you touch this, check the search form for updating,
 807 # too.
 808
 809 our @cgi_param_mapping = (
 810         project => "p",
 811         action => "a",
 812         file_name => "f",
 813         file_parent => "fp",
 814         hash => "h",
 815         hash_parent => "hp",
 816         hash_base => "hb",
 817         hash_parent_base => "hpb",
 818         page => "pg",
 819         order => "o",
 820         searchtext => "s",
 821         searchtype => "st",
 822         snapshot_format => "sf",
 823         extra_options => "opt",
 824         search_use_regexp => "sr",
 825         # this must be last entry (for manipulation from JavaScript)
 826         javascript => "js"
 827 );
 828 our %cgi_param_mapping = @cgi_param_mapping;
 829
 830 # we will also need to know the possible actions, for validation
 831 our %actions = (
 832         "blame" => \&git_blame,
 833         "blame_incremental" => \&git_blame_incremental,
 834         "blame_data" => \&git_blame_data,
 835         "blobdiff" => \&git_blobdiff,
 836         "blobdiff_plain" => \&git_blobdiff_plain,
 837         "blob" => \&git_blob,
 838         "blob_plain" => \&git_blob_plain,
 839         "commitdiff" => \&git_commitdiff,
 840         "commitdiff_plain" => \&git_commitdiff_plain,
 841         "commit" => \&git_commit,
 842         "forks" => \&git_forks,
 843         "heads" => \&git_heads,
 844         "history" => \&git_history,
 845         "log" => \&git_log,
 846         "patch" => \&git_patch,
 847         "patches" => \&git_patches,
 848         "rss" => \&git_rss,
 849         "atom" => \&git_atom,
 850         "search" => \&git_search,
 851         "search_help" => \&git_search_help,
 852         "shortlog" => \&git_shortlog,
 853         "summary" => \&git_summary,
 854         "tag" => \&git_tag,
 855         "tags" => \&git_tags,
 856         "tree" => \&git_tree,
 857         "snapshot" => \&git_snapshot,
 858         "object" => \&git_object,
 859         # those below don't need $project
 860         "opml" => \&git_opml,
 861         "project_list" => \&git_project_list,
 862         "project_index" => \&git_project_index,
 863 );
 864
 865 # finally, we have the hash of allowed extra_options for the commands that
 866 # allow them
 867 our %allowed_options = (
 868         "--no-merges" => [ qw(rss atom log shortlog history) ],
 869 );
 870
 871 our %actions_info = ();
 872 sub evaluate_actions_info {
 873         our %actions_info;
 874         our (%actions);
 875
 876         # unless explicitely stated otherwise, default output format is html
 877         foreach my $action (keys %actions) {
 878                 $actions_info{$action}{'output_format'} = 'html';
 879         }
 880         # list all exceptions; undef means variable (no definite format)
 881         map { $actions_info{$_}{'output_format'} = 'text' }
 882                 qw(commitdiff_plain patch patches project_index blame_data);
 883         map { $actions_info{$_}{'output_format'} = 'xml' }
 884                 qw(rss atom opml); # there are different types (document formats) of XML
 885         map { $actions_info{$_}{'output_format'} = undef }
 886                 qw(blob_plain object);
 887         $actions_info{'snapshot'}{'output_format'} = 'binary';
 888 }
 889
 890 sub action_outputs_html {
 891         my $action = shift;
 892         return $actions_info{$action}{'output_format'} eq 'html';
 893 }
 894
 895 sub browser_is_robot {
 896         return 1 if !exists $ENV{'HTTP_USER_AGENT'}; # gitweb run as script
 897         if (eval { require HTTP::BrowserDetect; }) {
 898                 my $browser = HTTP::BrowserDetect->new();
 899                 return $browser->robot();
 900         }
 901         # fallback on detecting known web browsers
 902         return 0 if ($ENV{'HTTP_USER_AGENT'} =~ /\b(?:Mozilla|Opera|Safari|IE)\b/);
 903         # be conservative; if not sure, assume non-interactive
 904         return 1;
 905 }
 906
 907 # fill %input_params with the CGI parameters. All values except for 'opt'
 908 # should be single values, but opt can be an array. We should probably
 909 # build an array of parameters that can be multi-valued, but since for the time
 910 # being it's only this one, we just single it out
 911 sub evaluate_query_params {
 912         our $cgi;
 913
 914         while (my ($name, $symbol) = each %cgi_param_mapping) {
 915                 if ($symbol eq 'opt') {
 916                         $input_params{$name} = [ $cgi->param($symbol) ];
 917                 } else {
 918                         $input_params{$name} = $cgi->param($symbol);
 919                 }
 920         }
 921 }
 922
 923 # now read PATH_INFO and update the parameter list for missing parameters
 924 sub evaluate_path_info {
 925         return if defined $input_params{'project'};
 926         return if !$path_info;
 927         $path_info =~ s,^/+,,;
 928         return if !$path_info;
 929
 930         # find which part of PATH_INFO is project
 931         my $project = $path_info;
 932         $project =~ s,/+$,,;
 933         while ($project && !check_head_link("$projectroot/$project")) {
 934                 $project =~ s,/*[^/]*$,,;
 935         }
 936         return unless $project;
 937         $input_params{'project'} = $project;
 938
 939         # do not change any parameters if an action is given using the query string
 940         return if $input_params{'action'};
 941         $path_info =~ s,^\Q$project\E/*,,;
 942
 943         # next, check if we have an action
 944         my $action = $path_info;
 945         $action =~ s,/.*$,,;
 946         if (exists $actions{$action}) {
 947                 $path_info =~ s,^$action/*,,;
 948                 $input_params{'action'} = $action;
 949         }
 950
 951         # list of actions that want hash_base instead of hash, but can have no
 952         # pathname (f) parameter
 953         my @wants_base = (
 954                 'tree',
 955                 'history',
 956         );
 957
 958         # we want to catch, among others
 959         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 960         my ($parentrefname, $parentpathname, $refname, $pathname) =
 961                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 962
 963         # first, analyze the 'current' part
 964         if (defined $pathname) {
 965                 # we got "branch:filename" or "branch:dir/"
 966                 # we could use git_get_type(branch:pathname), but:
 967                 # - it needs $git_dir
 968                 # - it does a git() call
 969                 # - the convention of terminating directories with a slash
 970                 #   makes it superfluous
 971                 # - embedding the action in the PATH_INFO would make it even
 972                 #   more superfluous
 973                 $pathname =~ s,^/+,,;
 974                 if (!$pathname || substr($pathname, -1) eq "/") {
 975                         $input_params{'action'} ||= "tree";
 976                         $pathname =~ s,/$,,;
 977                 } else {
 978                         # the default action depends on whether we had parent info
 979                         # or not
 980                         if ($parentrefname) {
 981                                 $input_params{'action'} ||= "blobdiff_plain";
 982                         } else {
 983                                 $input_params{'action'} ||= "blob_plain";
 984                         }
 985                 }
 986                 $input_params{'hash_base'} ||= $refname;
 987                 $input_params{'file_name'} ||= $pathname;
 988         } elsif (defined $refname) {
 989                 # we got "branch". In this case we have to choose if we have to
 990                 # set hash or hash_base.
 991                 #
 992                 # Most of the actions without a pathname only want hash to be
 993                 # set, except for the ones specified in @wants_base that want
 994                 # hash_base instead. It should also be noted that hand-crafted
 995                 # links having 'history' as an action and no pathname or hash
 996                 # set will fail, but that happens regardless of PATH_INFO.
 997                 if (defined $parentrefname) {
 998                         # if there is parent let the default be 'shortlog' action
 999                         # (for http://git.example.com/repo.git/A..B links); if there
1000                         # is no parent, dispatch will detect type of object and set
1001                         # action appropriately if required (if action is not set)
1002                         $input_params{'action'} ||= "shortlog";
1003                 }
1004                 if ($input_params{'action'} &&
1005                     grep { $_ eq $input_params{'action'} } @wants_base) {
1006                         $input_params{'hash_base'} ||= $refname;
1007                 } else {
1008                         $input_params{'hash'} ||= $refname;
1009                 }
1010         }
1011
1012         # next, handle the 'parent' part, if present
1013         if (defined $parentrefname) {
1014                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
1015                 # someproject/blobdiff/oldrev..newrev:/filename
1016                 if ($parentpathname) {
1017                         $parentpathname =~ s,^/+,,;
1018                         $parentpathname =~ s,/$,,;
1019                         $input_params{'file_parent'} ||= $parentpathname;
1020                 } else {
1021                         $input_params{'file_parent'} ||= $input_params{'file_name'};
1022                 }
1023                 # we assume that hash_parent_base is wanted if a path was specified,
1024                 # or if the action wants hash_base instead of hash
1025                 if (defined $input_params{'file_parent'} ||
1026                         grep { $_ eq $input_params{'action'} } @wants_base) {
1027                         $input_params{'hash_parent_base'} ||= $parentrefname;
1028                 } else {
1029                         $input_params{'hash_parent'} ||= $parentrefname;
1030                 }
1031         }
1032
1033         # for the snapshot action, we allow URLs in the form
1034         # $project/snapshot/$hash.ext
1035         # where .ext determines the snapshot and gets removed from the
1036         # passed $refname to provide the $hash.
1037         #
1038         # To be able to tell that $refname includes the format extension, we
1039         # require the following two conditions to be satisfied:
1040         # - the hash input parameter MUST have been set from the $refname part
1041         #   of the URL (i.e. they must be equal)
1042         # - the snapshot format MUST NOT have been defined already (e.g. from
1043         #   CGI parameter sf)
1044         # It's also useless to try any matching unless $refname has a dot,
1045         # so we check for that too
1046         if (defined $input_params{'action'} &&
1047                 $input_params{'action'} eq 'snapshot' &&
1048                 defined $refname && index($refname, '.') != -1 &&
1049                 $refname eq $input_params{'hash'} &&
1050                 !defined $input_params{'snapshot_format'}) {
1051                 # We loop over the known snapshot formats, checking for
1052                 # extensions. Allowed extensions are both the defined suffix
1053                 # (which includes the initial dot already) and the snapshot
1054                 # format key itself, with a prepended dot
1055                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1056                         my $hash = $refname;
1057                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1058                                 next;
1059                         }
1060                         my $sfx = $1;
1061                         # a valid suffix was found, so set the snapshot format
1062                         # and reset the hash parameter
1063                         $input_params{'snapshot_format'} = $fmt;
1064                         $input_params{'hash'} = $hash;
1065                         # we also set the format suffix to the one requested
1066                         # in the URL: this way a request for e.g. .tgz returns
1067                         # a .tgz instead of a .tar.gz
1068                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1069                         last;
1070                 }
1071         }
1072 }
1073
1074 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1075      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1076      $searchtext, $search_regexp);
1077 sub evaluate_and_validate_params {
1078         our $action = $input_params{'action'};
1079         if (defined $action) {
1080                 if (!validate_action($action)) {
1081                         die_error(400, "Invalid action parameter");
1082                 }
1083         }
1084
1085         # parameters which are pathnames
1086         our $project = $input_params{'project'};
1087         if (defined $project) {
1088                 if (!validate_project($project)) {
1089                         undef $project;
1090                         die_error(404, "No such project");
1091                 }
1092         }
1093
1094         our $file_name = $input_params{'file_name'};
1095         if (defined $file_name) {
1096                 if (!validate_pathname($file_name)) {
1097                         die_error(400, "Invalid file parameter");
1098                 }
1099         }
1100
1101         our $file_parent = $input_params{'file_parent'};
1102         if (defined $file_parent) {
1103                 if (!validate_pathname($file_parent)) {
1104                         die_error(400, "Invalid file parent parameter");
1105                 }
1106         }
1107
1108         # parameters which are refnames
1109         our $hash = $input_params{'hash'};
1110         if (defined $hash) {
1111                 if (!validate_refname($hash)) {
1112                         die_error(400, "Invalid hash parameter");
1113                 }
1114         }
1115
1116         our $hash_parent = $input_params{'hash_parent'};
1117         if (defined $hash_parent) {
1118                 if (!validate_refname($hash_parent)) {
1119                         die_error(400, "Invalid hash parent parameter");
1120                 }
1121         }
1122
1123         our $hash_base = $input_params{'hash_base'};
1124         if (defined $hash_base) {
1125                 if (!validate_refname($hash_base)) {
1126                         die_error(400, "Invalid hash base parameter");
1127                 }
1128         }
1129
1130         our @extra_options = @{$input_params{'extra_options'}};
1131         # @extra_options is always defined, since it can only be (currently) set from
1132         # CGI, and $cgi->param() returns the empty array in array context if the param
1133         # is not set
1134         foreach my $opt (@extra_options) {
1135                 if (not exists $allowed_options{$opt}) {
1136                         die_error(400, "Invalid option parameter");
1137                 }
1138                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1139                         die_error(400, "Invalid option parameter for this action");
1140                 }
1141         }
1142
1143         our $hash_parent_base = $input_params{'hash_parent_base'};
1144         if (defined $hash_parent_base) {
1145                 if (!validate_refname($hash_parent_base)) {
1146                         die_error(400, "Invalid hash parent base parameter");
1147                 }
1148         }
1149
1150         # other parameters
1151         our $page = $input_params{'page'};
1152         if (defined $page) {
1153                 if ($page =~ m/[^0-9]/) {
1154                         die_error(400, "Invalid page parameter");
1155                 }
1156         }
1157
1158         our $searchtype = $input_params{'searchtype'};
1159         if (defined $searchtype) {
1160                 if ($searchtype =~ m/[^a-z]/) {
1161                         die_error(400, "Invalid searchtype parameter");
1162                 }
1163         }
1164
1165         our $search_use_regexp = $input_params{'search_use_regexp'};
1166
1167         our $searchtext = $input_params{'searchtext'};
1168         our $search_regexp;
1169         if (defined $searchtext) {
1170                 if (length($searchtext) < 2) {
1171                         die_error(403, "At least two characters are required for search parameter");
1172                 }
1173                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1174         }
1175 }
1176
1177 # path to the current git repository
1178 our $git_dir;
1179 sub evaluate_git_dir {
1180         our $git_dir = "$projectroot/$project" if $project;
1181 }
1182
1183 our (@snapshot_fmts, $git_avatar);
1184 sub configure_gitweb_features {
1185         # list of supported snapshot formats
1186         our @snapshot_fmts = gitweb_get_feature('snapshot');
1187         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1188
1189         # check that the avatar feature is set to a known provider name,
1190         # and for each provider check if the dependencies are satisfied.
1191         # if the provider name is invalid or the dependencies are not met,
1192         # reset $git_avatar to the empty string.
1193         our ($git_avatar) = gitweb_get_feature('avatar');
1194         if ($git_avatar eq 'gravatar') {
1195                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1196         } elsif ($git_avatar eq 'picon') {
1197                 # no dependencies
1198         } else {
1199                 $git_avatar = '';
1200         }
1201 }
1202
1203 # custom error handler for caching engine (Internal Server Error)
1204 sub cache_error_handler {
1205         my $error = shift;
1206
1207         $error = to_utf8($error);
1208         $error =
1209                 "Error in caching layer: <i>".ref($cache)."</i><br>\n".
1210                 CGI::escapeHTML($error);
1211         # die_error() would exit
1212         die_error(undef, undef, $error);
1213 }
1214 # custom error handler: 'die <message>' is Internal Server Error
1215 sub handle_errors_html {
1216         my $msg = shift; # it is already HTML escaped
1217
1218         # to avoid infinite loop where error occurs in die_error,
1219         # change handler to default handler, disabling handle_errors_html
1220         set_message("Error occured when inside die_error:\n$msg");
1221
1222         # you cannot jump out of die_error when called as error handler;
1223         # the subroutine set via CGI::Carp::set_message is called _after_
1224         # HTTP headers are already written, so it cannot write them itself
1225         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1226 }
1227 set_message(\&handle_errors_html);
1228
1229 # dispatch
1230 sub dispatch {
1231         if (!defined $action) {
1232                 if (defined $hash) {
1233                         $action = git_get_type($hash);
1234                 } elsif (defined $hash_base && defined $file_name) {
1235                         $action = git_get_type("$hash_base:$file_name");
1236                 } elsif (defined $project) {
1237                         $action = 'summary';
1238                 } else {
1239                         $action = 'project_list';
1240                 }
1241         }
1242         if (!defined($actions{$action})) {
1243                 die_error(400, "Unknown action");
1244         }
1245         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1246             !$project) {
1247                 die_error(400, "Project needed");
1248         }
1249
1250         if ($caching_enabled) {
1251                 # human readable key identifying gitweb output
1252                 my $output_key = href(-replay => 1, -full => 1, -path_info => 0);
1253
1254                 cache_output($cache, $capture, $output_key, $actions{$action});
1255         } else {
1256                 $actions{$action}->();
1257         }
1258 }
1259
1260 sub reset_timer {
1261         our $t0 = [Time::HiRes::gettimeofday()]
1262                 if defined $t0;
1263         our $number_of_git_cmds = 0;
1264 }
1265
1266 sub run_request {
1267         reset_timer();
1268
1269         evaluate_uri();
1270         evaluate_gitweb_config();
1271         evaluate_git_version();
1272         check_loadavg();
1273         configure_caching()
1274                 if ($caching_enabled);
1275
1276         # $projectroot and $projects_list might be set in gitweb config file
1277         $projects_list ||= $projectroot;
1278
1279         evaluate_query_params();
1280         evaluate_path_info();
1281         evaluate_and_validate_params();
1282         evaluate_git_dir();
1283
1284         configure_gitweb_features();
1285
1286         dispatch();
1287 }
1288
1289 our $is_last_request = sub { 1 };
1290 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1291 our $CGI = 'CGI';
1292 our $cgi;
1293 sub configure_as_fcgi {
1294         require CGI::Fast;
1295         our $CGI = 'CGI::Fast';
1296
1297         my $request_number = 0;
1298         # let each child service 100 requests
1299         our $is_last_request = sub { ++$request_number > 100 };
1300 }
1301 sub evaluate_argv {
1302         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1303         configure_as_fcgi()
1304                 if $script_name =~ /\.fcgi$/;
1305
1306         return unless (@ARGV);
1307
1308         require Getopt::Long;
1309         Getopt::Long::GetOptions(
1310                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1311                 'nproc|n=i' => sub {
1312                         my ($arg, $val) = @_;
1313                         return unless eval { require FCGI::ProcManager; 1; };
1314                         my $proc_manager = FCGI::ProcManager->new({
1315                                 n_processes => $val,
1316                         });
1317                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1318                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1319                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1320                 },
1321         );
1322 }
1323
1324 sub run {
1325         evaluate_argv();
1326         evaluate_actions_info();
1327
1328         $pre_listen_hook->()
1329                 if $pre_listen_hook;
1330
1331  REQUEST:
1332         while ($cgi = $CGI->new()) {
1333                 $pre_dispatch_hook->()
1334                         if $pre_dispatch_hook;
1335
1336                 run_request();
1337
1338                 $post_dispatch_hook->()
1339                         if $post_dispatch_hook;
1340
1341                 last REQUEST if ($is_last_request->());
1342         }
1343
1344  DONE_GITWEB:
1345         1;
1346 }
1347
1348 sub configure_caching {
1349         if (!eval { require GitwebCache::CacheOutput; 1; }) {
1350                 # cache is configured _before_ handling request, so $cgi is not defined,
1351                 # so we can't just "die" with sending error message to web browser
1352                 #die_error(500, "Caching enabled and GitwebCache::CacheOutput not found");
1353
1354                 # turn off caching and warn instead
1355                 $caching_enabled = 0;
1356                 warn "Caching enabled and GitwebCache::CacheOutput not found";
1357         }
1358         GitwebCache::CacheOutput->import();
1359
1360         # $cache might be initialized (instantiated) cache, i.e. cache object,
1361         # or it might be name of class, or it might be undefined
1362         unless (defined $cache && ref($cache)) {
1363                 $cache ||= 'GitwebCache::FileCacheWithLocking';
1364                 eval "require $cache";
1365                 die $@ if $@;
1366                 $cache = $cache->new({
1367                         %cache_options,
1368                         #'cache_root' => '/tmp/cache',
1369                         #'cache_depth' => 2,
1370                         #'expires_in' => 20, # in seconds (CHI compatibile)
1371                         # (Cache::Cache compatibile initialization)
1372                         'default_expires_in' => $cache_options{'expires_in'},
1373                         # (CHI compatibile initialization)
1374                         'root_dir' => $cache_options{'cache_root'},
1375                         'depth' => $cache_options{'cache_depth'},
1376                         'on_get_error' => $cache_options{'on_error'},
1377                         'on_set_error' => $cache_options{'on_error'},
1378                 });
1379         }
1380         unless (defined $capture && ref($capture)) {
1381                 require GitwebCache::Capture::Simple;
1382                 $capture = GitwebCache::Capture::Simple->new();
1383         }
1384 }
1385
1386 run();
1387
1388 if (defined caller) {
1389         # wrapped in a subroutine processing requests,
1390         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1391         return;
1392 } else {
1393         # pure CGI script, serving single request
1394         exit;
1395 }
1396
1397 ## ======================================================================
1398 ## action links
1399
1400 # possible values of extra options
1401 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1402 # -replay => 1      - start from a current view (replay with modifications)
1403 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1404 sub href {
1405         my %params = @_;
1406         # default is to use -absolute url() i.e. $my_uri
1407         my $href = $params{-full} ? $my_url : $my_uri;
1408
1409         $params{'project'} = $project unless exists $params{'project'};
1410
1411         if ($params{-replay}) {
1412                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1413                         if (!exists $params{$name}) {
1414                                 $params{$name} = $input_params{$name};
1415                         }
1416                 }
1417         }
1418
1419         my $use_pathinfo = gitweb_check_feature('pathinfo');
1420         if (defined $params{'project'} &&
1421             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1422                 # try to put as many parameters as possible in PATH_INFO:
1423                 #   - project name
1424                 #   - action
1425                 #   - hash_parent or hash_parent_base:/file_parent
1426                 #   - hash or hash_base:/filename
1427                 #   - the snapshot_format as an appropriate suffix
1428
1429                 # When the script is the root DirectoryIndex for the domain,
1430                 # $href here would be something like http://gitweb.example.com/
1431                 # Thus, we strip any trailing / from $href, to spare us double
1432                 # slashes in the final URL
1433                 $href =~ s,/$,,;
1434
1435                 # Then add the project name, if present
1436                 $href .= "/".esc_url($params{'project'});
1437                 delete $params{'project'};
1438
1439                 # since we destructively absorb parameters, we keep this
1440                 # boolean that remembers if we're handling a snapshot
1441                 my $is_snapshot = $params{'action'} eq 'snapshot';
1442
1443                 # Summary just uses the project path URL, any other action is
1444                 # added to the URL
1445                 if (defined $params{'action'}) {
1446                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1447                         delete $params{'action'};
1448                 }
1449
1450                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1451                 # stripping nonexistent or useless pieces
1452                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1453                         || $params{'hash_parent'} || $params{'hash'});
1454                 if (defined $params{'hash_base'}) {
1455                         if (defined $params{'hash_parent_base'}) {
1456                                 $href .= esc_url($params{'hash_parent_base'});
1457                                 # skip the file_parent if it's the same as the file_name
1458                                 if (defined $params{'file_parent'}) {
1459                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1460                                                 delete $params{'file_parent'};
1461                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1462                                                 $href .= ":/".esc_url($params{'file_parent'});
1463                                                 delete $params{'file_parent'};
1464                                         }
1465                                 }
1466                                 $href .= "..";
1467                                 delete $params{'hash_parent'};
1468                                 delete $params{'hash_parent_base'};
1469                         } elsif (defined $params{'hash_parent'}) {
1470                                 $href .= esc_url($params{'hash_parent'}). "..";
1471                                 delete $params{'hash_parent'};
1472                         }
1473
1474                         $href .= esc_url($params{'hash_base'});
1475                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1476                                 $href .= ":/".esc_url($params{'file_name'});
1477                                 delete $params{'file_name'};
1478                         }
1479                         delete $params{'hash'};
1480                         delete $params{'hash_base'};
1481                 } elsif (defined $params{'hash'}) {
1482                         $href .= esc_url($params{'hash'});
1483                         delete $params{'hash'};
1484                 }
1485
1486                 # If the action was a snapshot, we can absorb the
1487                 # snapshot_format parameter too
1488                 if ($is_snapshot) {
1489                         my $fmt = $params{'snapshot_format'};
1490                         # snapshot_format should always be defined when href()
1491                         # is called, but just in case some code forgets, we
1492                         # fall back to the default
1493                         $fmt ||= $snapshot_fmts[0];
1494                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1495                         delete $params{'snapshot_format'};
1496                 }
1497         }
1498
1499         # now encode the parameters explicitly
1500         my @result = ();
1501         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1502                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1503                 if (defined $params{$name}) {
1504                         if (ref($params{$name}) eq "ARRAY") {
1505                                 foreach my $par (@{$params{$name}}) {
1506                                         push @result, $symbol . "=" . esc_param($par);
1507                                 }
1508                         } else {
1509                                 push @result, $symbol . "=" . esc_param($params{$name});
1510                         }
1511                 }
1512         }
1513         $href .= "?" . join(';', @result) if scalar @result;
1514
1515         return $href;
1516 }
1517
1518
1519 ## ======================================================================
1520 ## validation, quoting/unquoting and escaping
1521
1522 sub validate_action {
1523         my $input = shift || return undef;
1524         return undef unless exists $actions{$input};
1525         return $input;
1526 }
1527
1528 sub validate_project {
1529         my $input = shift || return undef;
1530         if (!validate_pathname($input) ||
1531                 !(-d "$projectroot/$input") ||
1532                 !check_export_ok("$projectroot/$input") ||
1533                 ($strict_export && !project_in_list($input))) {
1534                 return undef;
1535         } else {
1536                 return $input;
1537         }
1538 }
1539
1540 sub validate_pathname {
1541         my $input = shift || return undef;
1542
1543         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1544         # at the beginning, at the end, and between slashes.
1545         # also this catches doubled slashes
1546         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1547                 return undef;
1548         }
1549         # no null characters
1550         if ($input =~ m!\0!) {
1551                 return undef;
1552         }
1553         return $input;
1554 }
1555
1556 sub validate_refname {
1557         my $input = shift || return undef;
1558
1559         # textual hashes are O.K.
1560         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1561                 return $input;
1562         }
1563         # it must be correct pathname
1564         $input = validate_pathname($input)
1565                 or return undef;
1566         # restrictions on ref name according to git-check-ref-format
1567         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1568                 return undef;
1569         }
1570         return $input;
1571 }
1572
1573 # decode sequences of octets in utf8 into Perl's internal form,
1574 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1575 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1576 sub to_utf8 {
1577         my $str = shift;
1578         return undef unless defined $str;
1579         if (utf8::valid($str)) {
1580                 utf8::decode($str);
1581                 return $str;
1582         } else {
1583                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1584         }
1585 }
1586
1587 # quote unsafe chars, but keep the slash, even when it's not
1588 # correct, but quoted slashes look too horrible in bookmarks
1589 sub esc_param {
1590         my $str = shift;
1591         return undef unless defined $str;
1592         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1593         $str =~ s/ /\+/g;
1594         return $str;
1595 }
1596
1597 # quote unsafe chars in whole URL, so some characters cannot be quoted
1598 sub esc_url {
1599         my $str = shift;
1600         return undef unless defined $str;
1601         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1602         $str =~ s/ /\+/g;
1603         return $str;
1604 }
1605
1606 # replace invalid utf8 character with SUBSTITUTION sequence
1607 sub esc_html {
1608         my $str = shift;
1609         my %opts = @_;
1610
1611         return undef unless defined $str;
1612
1613         $str = to_utf8($str);
1614         $str = $cgi->escapeHTML($str);
1615         if ($opts{'-nbsp'}) {
1616                 $str =~ s/ /&nbsp;/g;
1617         }
1618         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1619         return $str;
1620 }
1621
1622 # quote control characters and escape filename to HTML
1623 sub esc_path {
1624         my $str = shift;
1625         my %opts = @_;
1626
1627         return undef unless defined $str;
1628
1629         $str = to_utf8($str);
1630         $str = $cgi->escapeHTML($str);
1631         if ($opts{'-nbsp'}) {
1632                 $str =~ s/ /&nbsp;/g;
1633         }
1634         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1635         return $str;
1636 }
1637
1638 # Make control characters "printable", using character escape codes (CEC)
1639 sub quot_cec {
1640         my $cntrl = shift;
1641         my %opts = @_;
1642         my %es = ( # character escape codes, aka escape sequences
1643                 "\t" => '\t',   # tab            (HT)
1644                 "\n" => '\n',   # line feed      (LF)
1645                 "\r" => '\r',   # carrige return (CR)
1646                 "\f" => '\f',   # form feed      (FF)
1647                 "\b" => '\b',   # backspace      (BS)
1648                 "\a" => '\a',   # alarm (bell)   (BEL)
1649                 "\e" => '\e',   # escape         (ESC)
1650                 "\013" => '\v', # vertical tab   (VT)
1651                 "\000" => '\0', # nul character  (NUL)
1652         );
1653         my $chr = ( (exists $es{$cntrl})
1654                     ? $es{$cntrl}
1655                     : sprintf('\%2x', ord($cntrl)) );
1656         if ($opts{-nohtml}) {
1657                 return $chr;
1658         } else {
1659                 return "<span class=\"cntrl\">$chr</span>";
1660         }
1661 }
1662
1663 # Alternatively use unicode control pictures codepoints,
1664 # Unicode "printable representation" (PR)
1665 sub quot_upr {
1666         my $cntrl = shift;
1667         my %opts = @_;
1668
1669         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1670         if ($opts{-nohtml}) {
1671                 return $chr;
1672         } else {
1673                 return "<span class=\"cntrl\">$chr</span>";
1674         }
1675 }
1676
1677 # git may return quoted and escaped filenames
1678 sub unquote {
1679         my $str = shift;
1680
1681         sub unq {
1682                 my $seq = shift;
1683                 my %es = ( # character escape codes, aka escape sequences
1684                         't' => "\t",   # tab            (HT, TAB)
1685                         'n' => "\n",   # newline        (NL)
1686                         'r' => "\r",   # return         (CR)
1687                         'f' => "\f",   # form feed      (FF)
1688                         'b' => "\b",   # backspace      (BS)
1689                         'a' => "\a",   # alarm (bell)   (BEL)
1690                         'e' => "\e",   # escape         (ESC)
1691                         'v' => "\013", # vertical tab   (VT)
1692                 );
1693
1694                 if ($seq =~ m/^[0-7]{1,3}$/) {
1695                         # octal char sequence
1696                         return chr(oct($seq));
1697                 } elsif (exists $es{$seq}) {
1698                         # C escape sequence, aka character escape code
1699                         return $es{$seq};
1700                 }
1701                 # quoted ordinary character
1702                 return $seq;
1703         }
1704
1705         if ($str =~ m/^"(.*)"$/) {
1706                 # needs unquoting
1707                 $str = $1;
1708                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1709         }
1710         return $str;
1711 }
1712
1713 # escape tabs (convert tabs to spaces)
1714 sub untabify {
1715         my $line = shift;
1716
1717         while ((my $pos = index($line, "\t")) != -1) {
1718                 if (my $count = (8 - ($pos % 8))) {
1719                         my $spaces = ' ' x $count;
1720                         $line =~ s/\t/$spaces/;
1721                 }
1722         }
1723
1724         return $line;
1725 }
1726
1727 sub project_in_list {
1728         my $project = shift;
1729         my @list = git_get_projects_list();
1730         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1731 }
1732
1733 ## ----------------------------------------------------------------------
1734 ## HTML aware string manipulation
1735
1736 # Try to chop given string on a word boundary between position
1737 # $len and $len+$add_len. If there is no word boundary there,
1738 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1739 # (marking chopped part) would be longer than given string.
1740 sub chop_str {
1741         my $str = shift;
1742         my $len = shift;
1743         my $add_len = shift || 10;
1744         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1745
1746         # Make sure perl knows it is utf8 encoded so we don't
1747         # cut in the middle of a utf8 multibyte char.
1748         $str = to_utf8($str);
1749
1750         # allow only $len chars, but don't cut a word if it would fit in $add_len
1751         # if it doesn't fit, cut it if it's still longer than the dots we would add
1752         # remove chopped character entities entirely
1753
1754         # when chopping in the middle, distribute $len into left and right part
1755         # return early if chopping wouldn't make string shorter
1756         if ($where eq 'center') {
1757                 return $str if ($len + 5 >= length($str)); # filler is length 5
1758                 $len = int($len/2);
1759         } else {
1760                 return $str if ($len + 4 >= length($str)); # filler is length 4
1761         }
1762
1763         # regexps: ending and beginning with word part up to $add_len
1764         my $endre = qr/.{$len}\w{0,$add_len}/;
1765         my $begre = qr/\w{0,$add_len}.{$len}/;
1766
1767         if ($where eq 'left') {
1768                 $str =~ m/^(.*?)($begre)$/;
1769                 my ($lead, $body) = ($1, $2);
1770                 if (length($lead) > 4) {
1771                         $lead = " ...";
1772                 }
1773                 return "$lead$body";
1774
1775         } elsif ($where eq 'center') {
1776                 $str =~ m/^($endre)(.*)$/;
1777                 my ($left, $str)  = ($1, $2);
1778                 $str =~ m/^(.*?)($begre)$/;
1779                 my ($mid, $right) = ($1, $2);
1780                 if (length($mid) > 5) {
1781                         $mid = " ... ";
1782                 }
1783                 return "$left$mid$right";
1784
1785         } else {
1786                 $str =~ m/^($endre)(.*)$/;
1787                 my $body = $1;
1788                 my $tail = $2;
1789                 if (length($tail) > 4) {
1790                         $tail = "... ";
1791                 }
1792                 return "$body$tail";
1793         }
1794 }
1795
1796 # takes the same arguments as chop_str, but also wraps a <span> around the
1797 # result with a title attribute if it does get chopped. Additionally, the
1798 # string is HTML-escaped.
1799 sub chop_and_escape_str {
1800         my ($str) = @_;
1801
1802         my $chopped = chop_str(@_);
1803         if ($chopped eq $str) {
1804                 return esc_html($chopped);
1805         } else {
1806                 $str =~ s/[[:cntrl:]]/?/g;
1807                 return $cgi->span({-title=>$str}, esc_html($chopped));
1808         }
1809 }
1810
1811 ## ----------------------------------------------------------------------
1812 ## functions returning short strings
1813
1814 # CSS class for given age value (in seconds)
1815 sub age_class {
1816         my $age = shift;
1817
1818         if (!defined $age) {
1819                 return "noage";
1820         } elsif ($age < 60*60*2) {
1821                 return "age0";
1822         } elsif ($age < 60*60*24*2) {
1823                 return "age1";
1824         } else {
1825                 return "age2";
1826         }
1827 }
1828
1829 # convert age in seconds to "nn units ago" string
1830 sub age_string {
1831         my $age = shift;
1832         my $age_str;
1833
1834         if ($age > 60*60*24*365*2) {
1835                 $age_str = (int $age/60/60/24/365);
1836                 $age_str .= " years ago";
1837         } elsif ($age > 60*60*24*(365/12)*2) {
1838                 $age_str = int $age/60/60/24/(365/12);
1839                 $age_str .= " months ago";
1840         } elsif ($age > 60*60*24*7*2) {
1841                 $age_str = int $age/60/60/24/7;
1842                 $age_str .= " weeks ago";
1843         } elsif ($age > 60*60*24*2) {
1844                 $age_str = int $age/60/60/24;
1845                 $age_str .= " days ago";
1846         } elsif ($age > 60*60*2) {
1847                 $age_str = int $age/60/60;
1848                 $age_str .= " hours ago";
1849         } elsif ($age > 60*2) {
1850                 $age_str = int $age/60;
1851                 $age_str .= " min ago";
1852         } elsif ($age > 2) {
1853                 $age_str = int $age;
1854                 $age_str .= " sec ago";
1855         } else {
1856                 $age_str .= " right now";
1857         }
1858         return $age_str;
1859 }
1860
1861 use constant {
1862         S_IFINVALID => 0030000,
1863         S_IFGITLINK => 0160000,
1864 };
1865
1866 # submodule/subproject, a commit object reference
1867 sub S_ISGITLINK {
1868         my $mode = shift;
1869
1870         return (($mode & S_IFMT) == S_IFGITLINK)
1871 }
1872
1873 # convert file mode in octal to symbolic file mode string
1874 sub mode_str {
1875         my $mode = oct shift;
1876
1877         if (S_ISGITLINK($mode)) {
1878                 return 'm---------';
1879         } elsif (S_ISDIR($mode & S_IFMT)) {
1880                 return 'drwxr-xr-x';
1881         } elsif (S_ISLNK($mode)) {
1882                 return 'lrwxrwxrwx';
1883         } elsif (S_ISREG($mode)) {
1884                 # git cares only about the executable bit
1885                 if ($mode & S_IXUSR) {
1886                         return '-rwxr-xr-x';
1887                 } else {
1888                         return '-rw-r--r--';
1889                 };
1890         } else {
1891                 return '----------';
1892         }
1893 }
1894
1895 # convert file mode in octal to file type string
1896 sub file_type {
1897         my $mode = shift;
1898
1899         if ($mode !~ m/^[0-7]+$/) {
1900                 return $mode;
1901         } else {
1902                 $mode = oct $mode;
1903         }
1904
1905         if (S_ISGITLINK($mode)) {
1906                 return "submodule";
1907         } elsif (S_ISDIR($mode & S_IFMT)) {
1908                 return "directory";
1909         } elsif (S_ISLNK($mode)) {
1910                 return "symlink";
1911         } elsif (S_ISREG($mode)) {
1912                 return "file";
1913         } else {
1914                 return "unknown";
1915         }
1916 }
1917
1918 # convert file mode in octal to file type description string
1919 sub file_type_long {
1920         my $mode = shift;
1921
1922         if ($mode !~ m/^[0-7]+$/) {
1923                 return $mode;
1924         } else {
1925                 $mode = oct $mode;
1926         }
1927
1928         if (S_ISGITLINK($mode)) {
1929                 return "submodule";
1930         } elsif (S_ISDIR($mode & S_IFMT)) {
1931                 return "directory";
1932         } elsif (S_ISLNK($mode)) {
1933                 return "symlink";
1934         } elsif (S_ISREG($mode)) {
1935                 if ($mode & S_IXUSR) {
1936                         return "executable";
1937                 } else {
1938                         return "file";
1939                 };
1940         } else {
1941                 return "unknown";
1942         }
1943 }
1944
1945
1946 ## ----------------------------------------------------------------------
1947 ## functions returning short HTML fragments, or transforming HTML fragments
1948 ## which don't belong to other sections
1949
1950 # format line of commit message.
1951 sub format_log_line_html {
1952         my $line = shift;
1953
1954         $line = esc_html($line, -nbsp=>1);
1955         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1956                 $cgi->a({-href => href(action=>"object", hash=>$1),
1957                                         -class => "text"}, $1);
1958         }eg;
1959
1960         return $line;
1961 }
1962
1963 # format marker of refs pointing to given object
1964
1965 # the destination action is chosen based on object type and current context:
1966 # - for annotated tags, we choose the tag view unless it's the current view
1967 #   already, in which case we go to shortlog view
1968 # - for other refs, we keep the current view if we're in history, shortlog or
1969 #   log view, and select shortlog otherwise
1970 sub format_ref_marker {
1971         my ($refs, $id) = @_;
1972         my $markers = '';
1973
1974         if (defined $refs->{$id}) {
1975                 foreach my $ref (@{$refs->{$id}}) {
1976                         # this code exploits the fact that non-lightweight tags are the
1977                         # only indirect objects, and that they are the only objects for which
1978                         # we want to use tag instead of shortlog as action
1979                         my ($type, $name) = qw();
1980                         my $indirect = ($ref =~ s/\^\{\}$//);
1981                         # e.g. tags/v2.6.11 or heads/next
1982                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1983                                 $type = $1;
1984                                 $name = $2;
1985                         } else {
1986                                 $type = "ref";
1987                                 $name = $ref;
1988                         }
1989
1990                         my $class = $type;
1991                         $class .= " indirect" if $indirect;
1992
1993                         my $dest_action = "shortlog";
1994
1995                         if ($indirect) {
1996                                 $dest_action = "tag" unless $action eq "tag";
1997                         } elsif ($action =~ /^(history|(short)?log)$/) {
1998                                 $dest_action = $action;
1999                         }
2000
2001                         my $dest = "";
2002                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2003                         $dest .= $ref;
2004
2005                         my $link = $cgi->a({
2006                                 -href => href(
2007                                         action=>$dest_action,
2008                                         hash=>$dest
2009                                 )}, $name);
2010
2011                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
2012                                 $link . "</span>";
2013                 }
2014         }
2015
2016         if ($markers) {
2017                 return ' <span class="refs">'. $markers . '</span>';
2018         } else {
2019                 return "";
2020         }
2021 }
2022
2023 # format, perhaps shortened and with markers, title line
2024 sub format_subject_html {
2025         my ($long, $short, $href, $extra) = @_;
2026         $extra = '' unless defined($extra);
2027
2028         if (length($short) < length($long)) {
2029                 $long =~ s/[[:cntrl:]]/?/g;
2030                 return $cgi->a({-href => $href, -class => "list subject",
2031                                 -title => to_utf8($long)},
2032                        esc_html($short)) . $extra;
2033         } else {
2034                 return $cgi->a({-href => $href, -class => "list subject"},
2035                        esc_html($long)) . $extra;
2036         }
2037 }
2038
2039 # Rather than recomputing the url for an email multiple times, we cache it
2040 # after the first hit. This gives a visible benefit in views where the avatar
2041 # for the same email is used repeatedly (e.g. shortlog).
2042 # The cache is shared by all avatar engines (currently gravatar only), which
2043 # are free to use it as preferred. Since only one avatar engine is used for any
2044 # given page, there's no risk for cache conflicts.
2045 our %avatar_cache = ();
2046
2047 # Compute the picon url for a given email, by using the picon search service over at
2048 # http://www.cs.indiana.edu/picons/search.html
2049 sub picon_url {
2050         my $email = lc shift;
2051         if (!$avatar_cache{$email}) {
2052                 my ($user, $domain) = split('@', $email);
2053                 $avatar_cache{$email} =
2054                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2055                         "$domain/$user/" .
2056                         "users+domains+unknown/up/single";
2057         }
2058         return $avatar_cache{$email};
2059 }
2060
2061 # Compute the gravatar url for a given email, if it's not in the cache already.
2062 # Gravatar stores only the part of the URL before the size, since that's the
2063 # one computationally more expensive. This also allows reuse of the cache for
2064 # different sizes (for this particular engine).
2065 sub gravatar_url {
2066         my $email = lc shift;
2067         my $size = shift;
2068         $avatar_cache{$email} ||=
2069                 "http://www.gravatar.com/avatar/" .
2070                         Digest::MD5::md5_hex($email) . "?s=";
2071         return $avatar_cache{$email} . $size;
2072 }
2073
2074 # Insert an avatar for the given $email at the given $size if the feature
2075 # is enabled.
2076 sub git_get_avatar {
2077         my ($email, %opts) = @_;
2078         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2079         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2080         $opts{-size} ||= 'default';
2081         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2082         my $url = "";
2083         if ($git_avatar eq 'gravatar') {
2084                 $url = gravatar_url($email, $size);
2085         } elsif ($git_avatar eq 'picon') {
2086                 $url = picon_url($email);
2087         }
2088         # Other providers can be added by extending the if chain, defining $url
2089         # as needed. If no variant puts something in $url, we assume avatars
2090         # are completely disabled/unavailable.
2091         if ($url) {
2092                 return $pre_white .
2093                        "<img width=\"$size\" " .
2094                             "class=\"avatar\" " .
2095                             "src=\"$url\" " .
2096                             "alt=\"\" " .
2097                        "/>" . $post_white;
2098         } else {
2099                 return "";
2100         }
2101 }
2102
2103 sub format_search_author {
2104         my ($author, $searchtype, $displaytext) = @_;
2105         my $have_search = gitweb_check_feature('search');
2106
2107         if ($have_search) {
2108                 my $performed = "";
2109                 if ($searchtype eq 'author') {
2110                         $performed = "authored";
2111                 } elsif ($searchtype eq 'committer') {
2112                         $performed = "committed";
2113                 }
2114
2115                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2116                                 searchtext=>$author,
2117                                 searchtype=>$searchtype), class=>"list",
2118                                 title=>"Search for commits $performed by $author"},
2119                                 $displaytext);
2120
2121         } else {
2122                 return $displaytext;
2123         }
2124 }
2125
2126 # format the author name of the given commit with the given tag
2127 # the author name is chopped and escaped according to the other
2128 # optional parameters (see chop_str).
2129 sub format_author_html {
2130         my $tag = shift;
2131         my $co = shift;
2132         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2133         return "<$tag class=\"author\">" .
2134                format_search_author($co->{'author_name'}, "author",
2135                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2136                        $author) .
2137                "</$tag>";
2138 }
2139
2140 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2141 sub format_git_diff_header_line {
2142         my $line = shift;
2143         my $diffinfo = shift;
2144         my ($from, $to) = @_;
2145
2146         if ($diffinfo->{'nparents'}) {
2147                 # combined diff
2148                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2149                 if ($to->{'href'}) {
2150                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2151                                          esc_path($to->{'file'}));
2152                 } else { # file was deleted (no href)
2153                         $line .= esc_path($to->{'file'});
2154                 }
2155         } else {
2156                 # "ordinary" diff
2157                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2158                 if ($from->{'href'}) {
2159                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2160                                          'a/' . esc_path($from->{'file'}));
2161                 } else { # file was added (no href)
2162                         $line .= 'a/' . esc_path($from->{'file'});
2163                 }
2164                 $line .= ' ';
2165                 if ($to->{'href'}) {
2166                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2167                                          'b/' . esc_path($to->{'file'}));
2168                 } else { # file was deleted
2169                         $line .= 'b/' . esc_path($to->{'file'});
2170                 }
2171         }
2172
2173         return "<div class=\"diff header\">$line</div>\n";
2174 }
2175
2176 # format extended diff header line, before patch itself
2177 sub format_extended_diff_header_line {
2178         my $line = shift;
2179         my $diffinfo = shift;
2180         my ($from, $to) = @_;
2181
2182         # match <path>
2183         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2184                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2185                                        esc_path($from->{'file'}));
2186         }
2187         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2188                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2189                                  esc_path($to->{'file'}));
2190         }
2191         # match single <mode>
2192         if ($line =~ m/\s(\d{6})$/) {
2193                 $line .= '<span class="info"> (' .
2194                          file_type_long($1) .
2195                          ')</span>';
2196         }
2197         # match <hash>
2198         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2199                 # can match only for combined diff
2200                 $line = 'index ';
2201                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2202                         if ($from->{'href'}[$i]) {
2203                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2204                                                   -class=>"hash"},
2205                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2206                         } else {
2207                                 $line .= '0' x 7;
2208                         }
2209                         # separator
2210                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2211                 }
2212                 $line .= '..';
2213                 if ($to->{'href'}) {
2214                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2215                                          substr($diffinfo->{'to_id'},0,7));
2216                 } else {
2217                         $line .= '0' x 7;
2218                 }
2219
2220         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2221                 # can match only for ordinary diff
2222                 my ($from_link, $to_link);
2223                 if ($from->{'href'}) {
2224                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2225                                              substr($diffinfo->{'from_id'},0,7));
2226                 } else {
2227                         $from_link = '0' x 7;
2228                 }
2229                 if ($to->{'href'}) {
2230                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2231                                            substr($diffinfo->{'to_id'},0,7));
2232                 } else {
2233                         $to_link = '0' x 7;
2234                 }
2235                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2236                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2237         }
2238
2239         return $line . "<br/>\n";
2240 }
2241
2242 # format from-file/to-file diff header
2243 sub format_diff_from_to_header {
2244         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2245         my $line;
2246         my $result = '';
2247
2248         $line = $from_line;
2249         #assert($line =~ m/^---/) if DEBUG;
2250         # no extra formatting for "^--- /dev/null"
2251         if (! $diffinfo->{'nparents'}) {
2252                 # ordinary (single parent) diff
2253                 if ($line =~ m!^--- "?a/!) {
2254                         if ($from->{'href'}) {
2255                                 $line = '--- a/' .
2256                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2257                                                 esc_path($from->{'file'}));
2258                         } else {
2259                                 $line = '--- a/' .
2260                                         esc_path($from->{'file'});
2261                         }
2262                 }
2263                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2264
2265         } else {
2266                 # combined diff (merge commit)
2267                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2268                         if ($from->{'href'}[$i]) {
2269                                 $line = '--- ' .
2270                                         $cgi->a({-href=>href(action=>"blobdiff",
2271                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2272                                                              hash_parent_base=>$parents[$i],
2273                                                              file_parent=>$from->{'file'}[$i],
2274                                                              hash=>$diffinfo->{'to_id'},
2275                                                              hash_base=>$hash,
2276                                                              file_name=>$to->{'file'}),
2277                                                  -class=>"path",
2278                                                  -title=>"diff" . ($i+1)},
2279                                                 $i+1) .
2280                                         '/' .
2281                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2282                                                 esc_path($from->{'file'}[$i]));
2283                         } else {
2284                                 $line = '--- /dev/null';
2285                         }
2286                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2287                 }
2288         }
2289
2290         $line = $to_line;
2291         #assert($line =~ m/^\+\+\+/) if DEBUG;
2292         # no extra formatting for "^+++ /dev/null"
2293         if ($line =~ m!^\+\+\+ "?b/!) {
2294                 if ($to->{'href'}) {
2295                         $line = '+++ b/' .
2296                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2297                                         esc_path($to->{'file'}));
2298                 } else {
2299                         $line = '+++ b/' .
2300                                 esc_path($to->{'file'});
2301                 }
2302         }
2303         $result .= qq!<div class="diff to_file">$line</div>\n!;
2304
2305         return $result;
2306 }
2307
2308 # create note for patch simplified by combined diff
2309 sub format_diff_cc_simplified {
2310         my ($diffinfo, @parents) = @_;
2311         my $result = '';
2312
2313         $result .= "<div class=\"diff header\">" .
2314                    "diff --cc ";
2315         if (!is_deleted($diffinfo)) {
2316                 $result .= $cgi->a({-href => href(action=>"blob",
2317                                                   hash_base=>$hash,
2318                                                   hash=>$diffinfo->{'to_id'},
2319                                                   file_name=>$diffinfo->{'to_file'}),
2320                                     -class => "path"},
2321                                    esc_path($diffinfo->{'to_file'}));
2322         } else {
2323                 $result .= esc_path($diffinfo->{'to_file'});
2324         }
2325         $result .= "</div>\n" . # class="diff header"
2326                    "<div class=\"diff nodifferences\">" .
2327                    "Simple merge" .
2328                    "</div>\n"; # class="diff nodifferences"
2329
2330         return $result;
2331 }
2332
2333 # format patch (diff) line (not to be used for diff headers)
2334 sub format_diff_line {
2335         my $line = shift;
2336         my ($from, $to) = @_;
2337         my $diff_class = "";
2338
2339         chomp $line;
2340
2341         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2342                 # combined diff
2343                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2344                 if ($line =~ m/^\@{3}/) {
2345                         $diff_class = " chunk_header";
2346                 } elsif ($line =~ m/^\\/) {
2347                         $diff_class = " incomplete";
2348                 } elsif ($prefix =~ tr/+/+/) {
2349                         $diff_class = " add";
2350                 } elsif ($prefix =~ tr/-/-/) {
2351                         $diff_class = " rem";
2352                 }
2353         } else {
2354                 # assume ordinary diff
2355                 my $char = substr($line, 0, 1);
2356                 if ($char eq '+') {
2357                         $diff_class = " add";
2358                 } elsif ($char eq '-') {
2359                         $diff_class = " rem";
2360                 } elsif ($char eq '@') {
2361                         $diff_class = " chunk_header";
2362                 } elsif ($char eq "\\") {
2363                         $diff_class = " incomplete";
2364                 }
2365         }
2366         $line = untabify($line);
2367         if ($from && $to && $line =~ m/^\@{2} /) {
2368                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2369                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2370
2371                 $from_lines = 0 unless defined $from_lines;
2372                 $to_lines   = 0 unless defined $to_lines;
2373
2374                 if ($from->{'href'}) {
2375                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2376                                              -class=>"list"}, $from_text);
2377                 }
2378                 if ($to->{'href'}) {
2379                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2380                                              -class=>"list"}, $to_text);
2381                 }
2382                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2383                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2384                 return "<div class=\"diff$diff_class\">$line</div>\n";
2385         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2386                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2387                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2388
2389                 @from_text = split(' ', $ranges);
2390                 for (my $i = 0; $i < @from_text; ++$i) {
2391                         ($from_start[$i], $from_nlines[$i]) =
2392                                 (split(',', substr($from_text[$i], 1)), 0);
2393                 }
2394
2395                 $to_text   = pop @from_text;
2396                 $to_start  = pop @from_start;
2397                 $to_nlines = pop @from_nlines;
2398
2399                 $line = "<span class=\"chunk_info\">$prefix ";
2400                 for (my $i = 0; $i < @from_text; ++$i) {
2401                         if ($from->{'href'}[$i]) {
2402                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2403                                                   -class=>"list"}, $from_text[$i]);
2404                         } else {
2405                                 $line .= $from_text[$i];
2406                         }
2407                         $line .= " ";
2408                 }
2409                 if ($to->{'href'}) {
2410                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2411                                           -class=>"list"}, $to_text);
2412                 } else {
2413                         $line .= $to_text;
2414                 }
2415                 $line .= " $prefix</span>" .
2416                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2417                 return "<div class=\"diff$diff_class\">$line</div>\n";
2418         }
2419         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2420 }
2421
2422 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2423 # linked.  Pass the hash of the tree/commit to snapshot.
2424 sub format_snapshot_links {
2425         my ($hash) = @_;
2426         my $num_fmts = @snapshot_fmts;
2427         if ($num_fmts > 1) {
2428                 # A parenthesized list of links bearing format names.
2429                 # e.g. "snapshot (_tar.gz_ _zip_)"
2430                 return "snapshot (" . join(' ', map
2431                         $cgi->a({
2432                                 -href => href(
2433                                         action=>"snapshot",
2434                                         hash=>$hash,
2435                                         snapshot_format=>$_
2436                                 )
2437                         }, $known_snapshot_formats{$_}{'display'})
2438                 , @snapshot_fmts) . ")";
2439         } elsif ($num_fmts == 1) {
2440                 # A single "snapshot" link whose tooltip bears the format name.
2441                 # i.e. "_snapshot_"
2442                 my ($fmt) = @snapshot_fmts;
2443                 return
2444                         $cgi->a({
2445                                 -href => href(
2446                                         action=>"snapshot",
2447                                         hash=>$hash,
2448                                         snapshot_format=>$fmt
2449                                 ),
2450                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2451                         }, "snapshot");
2452         } else { # $num_fmts == 0
2453                 return undef;
2454         }
2455 }
2456
2457 ## ......................................................................
2458 ## functions returning values to be passed, perhaps after some
2459 ## transformation, to other functions; e.g. returning arguments to href()
2460
2461 # returns hash to be passed to href to generate gitweb URL
2462 # in -title key it returns description of link
2463 sub get_feed_info {
2464         my $format = shift || 'Atom';
2465         my %res = (action => lc($format));
2466
2467         # feed links are possible only for project views
2468         return unless (defined $project);
2469         # some views should link to OPML, or to generic project feed,
2470         # or don't have specific feed yet (so they should use generic)
2471         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2472
2473         my $branch;
2474         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2475         # from tag links; this also makes possible to detect branch links
2476         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2477             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2478                 $branch = $1;
2479         }
2480         # find log type for feed description (title)
2481         my $type = 'log';
2482         if (defined $file_name) {
2483                 $type  = "history of $file_name";
2484                 $type .= "/" if ($action eq 'tree');
2485                 $type .= " on '$branch'" if (defined $branch);
2486         } else {
2487                 $type = "log of $branch" if (defined $branch);
2488         }
2489
2490         $res{-title} = $type;
2491         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2492         $res{'file_name'} = $file_name;
2493
2494         return %res;
2495 }
2496
2497 ## ----------------------------------------------------------------------
2498 ## git utility subroutines, invoking git commands
2499
2500 # returns path to the core git executable and the --git-dir parameter as list
2501 sub git_cmd {
2502         $number_of_git_cmds++;
2503         return $GIT, '--git-dir='.$git_dir;
2504 }
2505
2506 # quote the given arguments for passing them to the shell
2507 # quote_command("command", "arg 1", "arg with ' and ! characters")
2508 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2509 # Try to avoid using this function wherever possible.
2510 sub quote_command {
2511         return join(' ',
2512                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2513 }
2514
2515 # get HEAD ref of given project as hash
2516 sub git_get_head_hash {
2517         return git_get_full_hash(shift, 'HEAD');
2518 }
2519
2520 sub git_get_full_hash {
2521         return git_get_hash(@_);
2522 }
2523
2524 sub git_get_short_hash {
2525         return git_get_hash(@_, '--short=7');
2526 }
2527
2528 sub git_get_hash {
2529         my ($project, $hash, @options) = @_;
2530         my $o_git_dir = $git_dir;
2531         my $retval = undef;
2532         $git_dir = "$projectroot/$project";
2533         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2534             '--verify', '-q', @options, $hash) {
2535                 $retval = <$fd>;
2536                 chomp $retval if defined $retval;
2537                 close $fd;
2538         }
2539         if (defined $o_git_dir) {
2540                 $git_dir = $o_git_dir;
2541         }
2542         return $retval;
2543 }
2544
2545 # get type of given object
2546 sub git_get_type {
2547         my $hash = shift;
2548
2549         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2550         my $type = <$fd>;
2551         close $fd or return;
2552         chomp $type;
2553         return $type;
2554 }
2555
2556 # repository configuration
2557 our $config_file = '';
2558 our %config;
2559
2560 # store multiple values for single key as anonymous array reference
2561 # single values stored directly in the hash, not as [ <value> ]
2562 sub hash_set_multi {
2563         my ($hash, $key, $value) = @_;
2564
2565         if (!exists $hash->{$key}) {
2566                 $hash->{$key} = $value;
2567         } elsif (!ref $hash->{$key}) {
2568                 $hash->{$key} = [ $hash->{$key}, $value ];
2569         } else {
2570                 push @{$hash->{$key}}, $value;
2571         }
2572 }
2573
2574 # return hash of git project configuration
2575 # optionally limited to some section, e.g. 'gitweb'
2576 sub git_parse_project_config {
2577         my $section_regexp = shift;
2578         my %config;
2579
2580         local $/ = "\0";
2581
2582         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2583                 or return;
2584
2585         while (my $keyval = <$fh>) {
2586                 chomp $keyval;
2587                 my ($key, $value) = split(/\n/, $keyval, 2);
2588
2589                 hash_set_multi(\%config, $key, $value)
2590                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2591         }
2592         close $fh;
2593
2594         return %config;
2595 }
2596
2597 # convert config value to boolean: 'true' or 'false'
2598 # no value, number > 0, 'true' and 'yes' values are true
2599 # rest of values are treated as false (never as error)
2600 sub config_to_bool {
2601         my $val = shift;
2602
2603         return 1 if !defined $val;             # section.key
2604
2605         # strip leading and trailing whitespace
2606         $val =~ s/^\s+//;
2607         $val =~ s/\s+$//;
2608
2609         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2610                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2611 }
2612
2613 # convert config value to simple decimal number
2614 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2615 # to be multiplied by 1024, 1048576, or 1073741824
2616 sub config_to_int {
2617         my $val = shift;
2618
2619         # strip leading and trailing whitespace
2620         $val =~ s/^\s+//;
2621         $val =~ s/\s+$//;
2622
2623         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2624                 $unit = lc($unit);
2625                 # unknown unit is treated as 1
2626                 return $num * ($unit eq 'g' ? 1073741824 :
2627                                $unit eq 'm' ?    1048576 :
2628                                $unit eq 'k' ?       1024 : 1);
2629         }
2630         return $val;
2631 }
2632
2633 # convert config value to array reference, if needed
2634 sub config_to_multi {
2635         my $val = shift;
2636
2637         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2638 }
2639
2640 sub git_get_project_config {
2641         my ($key, $type) = @_;
2642
2643         return unless defined $git_dir;
2644
2645         # key sanity check
2646         return unless ($key);
2647         $key =~ s/^gitweb\.//;
2648         return if ($key =~ m/\W/);
2649
2650         # type sanity check
2651         if (defined $type) {
2652                 $type =~ s/^--//;
2653                 $type = undef
2654                         unless ($type eq 'bool' || $type eq 'int');
2655         }
2656
2657         # get config
2658         if (!defined $config_file ||
2659             $config_file ne "$git_dir/config") {
2660                 %config = git_parse_project_config('gitweb');
2661                 $config_file = "$git_dir/config";
2662         }
2663
2664         # check if config variable (key) exists
2665         return unless exists $config{"gitweb.$key"};
2666
2667         # ensure given type
2668         if (!defined $type) {
2669                 return $config{"gitweb.$key"};
2670         } elsif ($type eq 'bool') {
2671                 # backward compatibility: 'git config --bool' returns true/false
2672                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2673         } elsif ($type eq 'int') {
2674                 return config_to_int($config{"gitweb.$key"});
2675         }
2676         return $config{"gitweb.$key"};
2677 }
2678
2679 # get hash of given path at given ref
2680 sub git_get_hash_by_path {
2681         my $base = shift;
2682         my $path = shift || return undef;
2683         my $type = shift;
2684
2685         $path =~ s,/+$,,;
2686
2687         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2688                 or die_error(500, "Open git-ls-tree failed");
2689         my $line = <$fd>;
2690         close $fd or return undef;
2691
2692         if (!defined $line) {
2693                 # there is no tree or hash given by $path at $base
2694                 return undef;
2695         }
2696
2697         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2698         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2699         if (defined $type && $type ne $2) {
2700                 # type doesn't match
2701                 return undef;
2702         }
2703         return $3;
2704 }
2705
2706 # get path of entry with given hash at given tree-ish (ref)
2707 # used to get 'from' filename for combined diff (merge commit) for renames
2708 sub git_get_path_by_hash {
2709         my $base = shift || return;
2710         my $hash = shift || return;
2711
2712         local $/ = "\0";
2713
2714         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2715                 or return undef;
2716         while (my $line = <$fd>) {
2717                 chomp $line;
2718
2719                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2720                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2721                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2722                         close $fd;
2723                         return $1;
2724                 }
2725         }
2726         close $fd;
2727         return undef;
2728 }
2729
2730 ## ......................................................................
2731 ## git utility functions, directly accessing git repository
2732
2733 sub git_get_project_description {
2734         my $path = shift;
2735
2736         $git_dir = "$projectroot/$path";
2737         open my $fd, '<', "$git_dir/description"
2738                 or return git_get_project_config('description');
2739         my $descr = <$fd>;
2740         close $fd;
2741         if (defined $descr) {
2742                 chomp $descr;
2743         }
2744         return $descr;
2745 }
2746
2747 sub git_get_project_ctags {
2748         my $path = shift;
2749         my $ctags = {};
2750
2751         $git_dir = "$projectroot/$path";
2752         opendir my $dh, "$git_dir/ctags"
2753                 or return $ctags;
2754         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2755                 open my $ct, '<', $_ or next;
2756                 my $val = <$ct>;
2757                 chomp $val;
2758                 close $ct;
2759                 my $ctag = $_; $ctag =~ s#.*/##;
2760                 $ctags->{$ctag} = $val;
2761         }
2762         closedir $dh;
2763         $ctags;
2764 }
2765
2766 sub git_populate_project_tagcloud {
2767         my $ctags = shift;
2768
2769         # First, merge different-cased tags; tags vote on casing
2770         my %ctags_lc;
2771         foreach (keys %$ctags) {
2772                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2773                 if (not $ctags_lc{lc $_}->{topcount}
2774                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2775                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2776                         $ctags_lc{lc $_}->{topname} = $_;
2777                 }
2778         }
2779
2780         my $cloud;
2781         if (eval { require HTML::TagCloud; 1; }) {
2782                 $cloud = HTML::TagCloud->new;
2783                 foreach (sort keys %ctags_lc) {
2784                         # Pad the title with spaces so that the cloud looks
2785                         # less crammed.
2786                         my $title = $ctags_lc{$_}->{topname};
2787                         $title =~ s/ /&nbsp;/g;
2788                         $title =~ s/^/&nbsp;/g;
2789                         $title =~ s/$/&nbsp;/g;
2790                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2791                 }
2792         } else {
2793                 $cloud = \%ctags_lc;
2794         }
2795         $cloud;
2796 }
2797
2798 sub git_show_project_tagcloud {
2799         my ($cloud, $count) = @_;
2800         print STDERR ref($cloud)."..\n";
2801         if (ref $cloud eq 'HTML::TagCloud') {
2802                 return $cloud->html_and_css($count);
2803         } else {
2804                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2805                 return '<p align="center">' . join (', ', map {
2806                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2807                 } splice(@tags, 0, $count)) . '</p>';
2808         }
2809 }
2810
2811 sub git_get_project_url_list {
2812         my $path = shift;
2813
2814         $git_dir = "$projectroot/$path";
2815         open my $fd, '<', "$git_dir/cloneurl"
2816                 or return wantarray ?
2817                 @{ config_to_multi(git_get_project_config('url')) } :
2818                    config_to_multi(git_get_project_config('url'));
2819         my @git_project_url_list = map { chomp; $_ } <$fd>;
2820         close $fd;
2821
2822         return wantarray ? @git_project_url_list : \@git_project_url_list;
2823 }
2824
2825 sub git_get_projects_list {
2826         my ($filter) = @_;
2827         my @list;
2828
2829         $filter ||= '';
2830         $filter =~ s/\.git$//;
2831
2832         my $check_forks = gitweb_check_feature('forks');
2833
2834         if (-d $projects_list) {
2835                 # search in directory
2836                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2837                 # remove the trailing "/"
2838                 $dir =~ s!/+$!!;
2839                 my $pfxlen = length("$dir");
2840                 my $pfxdepth = ($dir =~ tr!/!!);
2841
2842                 File::Find::find({
2843                         follow_fast => 1, # follow symbolic links
2844                         follow_skip => 2, # ignore duplicates
2845                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2846                         wanted => sub {
2847                                 # global variables
2848                                 our $project_maxdepth;
2849                                 our $projectroot;
2850                                 # skip project-list toplevel, if we get it.
2851                                 return if (m!^[/.]$!);
2852                                 # only directories can be git repositories
2853                                 return unless (-d $_);
2854                                 # don't traverse too deep (Find is super slow on os x)
2855                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2856                                         $File::Find::prune = 1;
2857                                         return;
2858                                 }
2859
2860                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2861                                 # we check related file in $projectroot
2862                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2863                                 if (check_export_ok("$projectroot/$path")) {
2864                                         push @list, { path => $path };
2865                                         $File::Find::prune = 1;
2866                                 }
2867                         },
2868                 }, "$dir");
2869
2870         } elsif (-f $projects_list) {
2871                 # read from file(url-encoded):
2872                 # 'git%2Fgit.git Linus+Torvalds'
2873                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2874                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2875                 my %paths;
2876                 open my $fd, '<', $projects_list or return;
2877         PROJECT:
2878                 while (my $line = <$fd>) {
2879                         chomp $line;
2880                         my ($path, $owner) = split ' ', $line;
2881                         $path = unescape($path);
2882                         $owner = unescape($owner);
2883                         if (!defined $path) {
2884                                 next;
2885                         }
2886                         if ($filter ne '') {
2887                                 # looking for forks;
2888                                 my $pfx = substr($path, 0, length($filter));
2889                                 if ($pfx ne $filter) {
2890                                         next PROJECT;
2891                                 }
2892                                 my $sfx = substr($path, length($filter));
2893                                 if ($sfx !~ /^\/.*\.git$/) {
2894                                         next PROJECT;
2895                                 }
2896                         } elsif ($check_forks) {
2897                         PATH:
2898                                 foreach my $filter (keys %paths) {
2899                                         # looking for forks;
2900                                         my $pfx = substr($path, 0, length($filter));
2901                                         if ($pfx ne $filter) {
2902                                                 next PATH;
2903                                         }
2904                                         my $sfx = substr($path, length($filter));
2905                                         if ($sfx !~ /^\/.*\.git$/) {
2906                                                 next PATH;
2907                                         }
2908                                         # is a fork, don't include it in
2909                                         # the list
2910                                         next PROJECT;
2911                                 }
2912                         }
2913                         if (check_export_ok("$projectroot/$path")) {
2914                                 my $pr = {
2915                                         path => $path,
2916                                         owner => to_utf8($owner),
2917                                 };
2918                                 push @list, $pr;
2919                                 (my $forks_path = $path) =~ s/\.git$//;
2920                                 $paths{$forks_path}++;
2921                         }
2922                 }
2923                 close $fd;
2924         }
2925         return @list;
2926 }
2927
2928 our $gitweb_project_owner = undef;
2929 sub git_get_project_list_from_file {
2930
2931         return if (defined $gitweb_project_owner);
2932
2933         $gitweb_project_owner = {};
2934         # read from file (url-encoded):
2935         # 'git%2Fgit.git Linus+Torvalds'
2936         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2937         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2938         if (-f $projects_list) {
2939                 open(my $fd, '<', $projects_list);
2940                 while (my $line = <$fd>) {
2941                         chomp $line;
2942                         my ($pr, $ow) = split ' ', $line;
2943                         $pr = unescape($pr);
2944                         $ow = unescape($ow);
2945                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2946                 }
2947                 close $fd;
2948         }
2949 }
2950
2951 sub git_get_project_owner {
2952         my $project = shift;
2953         my $owner;
2954
2955         return undef unless $project;
2956         $git_dir = "$projectroot/$project";
2957
2958         if (!defined $gitweb_project_owner) {
2959                 git_get_project_list_from_file();
2960         }
2961
2962         if (exists $gitweb_project_owner->{$project}) {
2963                 $owner = $gitweb_project_owner->{$project};
2964         }
2965         if (!defined $owner){
2966                 $owner = git_get_project_config('owner');
2967         }
2968         if (!defined $owner) {
2969                 $owner = get_file_owner("$git_dir");
2970         }
2971
2972         return $owner;
2973 }
2974
2975 sub git_get_last_activity {
2976         my ($path) = @_;
2977         my $fd;
2978
2979         $git_dir = "$projectroot/$path";
2980         open($fd, "-|", git_cmd(), 'for-each-ref',
2981              '--format=%(committer)',
2982              '--sort=-committerdate',
2983              '--count=1',
2984              'refs/heads') or return;
2985         my $most_recent = <$fd>;
2986         close $fd or return;
2987         if (defined $most_recent &&
2988             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2989                 my $timestamp = $1;
2990                 my $age = time - $timestamp;
2991                 return ($age, age_string($age));
2992         }
2993         return (undef, undef);
2994 }
2995
2996 sub git_get_references {
2997         my $type = shift || "";
2998         my %refs;
2999         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3000         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3001         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3002                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3003                 or return;
3004
3005         while (my $line = <$fd>) {
3006                 chomp $line;
3007                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3008                         if (defined $refs{$1}) {
3009                                 push @{$refs{$1}}, $2;
3010                         } else {
3011                                 $refs{$1} = [ $2 ];
3012                         }
3013                 }
3014         }
3015         close $fd or return;
3016         return \%refs;
3017 }
3018
3019 sub git_get_rev_name_tags {
3020         my $hash = shift || return undef;
3021
3022         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3023                 or return;
3024         my $name_rev = <$fd>;
3025         close $fd;
3026
3027         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3028                 return $1;
3029         } else {
3030                 # catches also '$hash undefined' output
3031                 return undef;
3032         }
3033 }
3034
3035 ## ----------------------------------------------------------------------
3036 ## parse to hash functions
3037
3038 sub parse_date {
3039         my $epoch = shift;
3040         my $tz = shift || "-0000";
3041
3042         my %date;
3043         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3044         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3045         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3046         $date{'hour'} = $hour;
3047         $date{'minute'} = $min;
3048         $date{'mday'} = $mday;
3049         $date{'day'} = $days[$wday];
3050         $date{'month'} = $months[$mon];
3051         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3052                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3053         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3054                              $mday, $months[$mon], $hour ,$min;
3055         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3056                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3057
3058         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
3059         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
3060         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3061         $date{'hour_local'} = $hour;
3062         $date{'minute_local'} = $min;
3063         $date{'tz_local'} = $tz;
3064         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3065                                   1900+$year, $mon+1, $mday,
3066                                   $hour, $min, $sec, $tz);
3067         return %date;
3068 }
3069
3070 sub parse_tag {
3071         my $tag_id = shift;
3072         my %tag;
3073         my @comment;
3074
3075         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3076         $tag{'id'} = $tag_id;
3077         while (my $line = <$fd>) {
3078                 chomp $line;
3079                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3080                         $tag{'object'} = $1;
3081                 } elsif ($line =~ m/^type (.+)$/) {
3082                         $tag{'type'} = $1;
3083                 } elsif ($line =~ m/^tag (.+)$/) {
3084                         $tag{'name'} = $1;
3085                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3086                         $tag{'author'} = $1;
3087                         $tag{'author_epoch'} = $2;
3088                         $tag{'author_tz'} = $3;
3089                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3090                                 $tag{'author_name'}  = $1;
3091                                 $tag{'author_email'} = $2;
3092                         } else {
3093                                 $tag{'author_name'} = $tag{'author'};
3094                         }
3095                 } elsif ($line =~ m/--BEGIN/) {
3096                         push @comment, $line;
3097                         last;
3098                 } elsif ($line eq "") {
3099                         last;
3100                 }
3101         }
3102         push @comment, <$fd>;
3103         $tag{'comment'} = \@comment;
3104         close $fd or return;
3105         if (!defined $tag{'name'}) {
3106                 return
3107         };
3108         return %tag
3109 }
3110
3111 sub parse_commit_text {
3112         my ($commit_text, $withparents) = @_;
3113         my @commit_lines = split '\n', $commit_text;
3114         my %co;
3115
3116         pop @commit_lines; # Remove '\0'
3117
3118         if (! @commit_lines) {
3119                 return;
3120         }
3121
3122         my $header = shift @commit_lines;
3123         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3124                 return;
3125         }
3126         ($co{'id'}, my @parents) = split ' ', $header;
3127         while (my $line = shift @commit_lines) {
3128                 last if $line eq "\n";
3129                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3130                         $co{'tree'} = $1;
3131                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3132                         push @parents, $1;
3133                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3134                         $co{'author'} = to_utf8($1);
3135                         $co{'author_epoch'} = $2;
3136                         $co{'author_tz'} = $3;
3137                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3138                                 $co{'author_name'}  = $1;
3139                                 $co{'author_email'} = $2;
3140                         } else {
3141                                 $co{'author_name'} = $co{'author'};
3142                         }
3143                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3144                         $co{'committer'} = to_utf8($1);
3145                         $co{'committer_epoch'} = $2;
3146                         $co{'committer_tz'} = $3;
3147                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3148                                 $co{'committer_name'}  = $1;
3149                                 $co{'committer_email'} = $2;
3150                         } else {
3151                                 $co{'committer_name'} = $co{'committer'};
3152                         }
3153                 }
3154         }
3155         if (!defined $co{'tree'}) {
3156                 return;
3157         };
3158         $co{'parents'} = \@parents;
3159         $co{'parent'} = $parents[0];
3160
3161         foreach my $title (@commit_lines) {
3162                 $title =~ s/^    //;
3163                 if ($title ne "") {
3164                         $co{'title'} = chop_str($title, 80, 5);
3165                         # remove leading stuff of merges to make the interesting part visible
3166                         if (length($title) > 50) {
3167                                 $title =~ s/^Automatic //;
3168                                 $title =~ s/^merge (of|with) /Merge ... /i;
3169                                 if (length($title) > 50) {
3170                                         $title =~ s/(http|rsync):\/\///;
3171                                 }
3172                                 if (length($title) > 50) {
3173                                         $title =~ s/(master|www|rsync)\.//;
3174                                 }
3175                                 if (length($title) > 50) {
3176                                         $title =~ s/kernel.org:?//;
3177                                 }
3178                                 if (length($title) > 50) {
3179                                         $title =~ s/\/pub\/scm//;
3180                                 }
3181                         }
3182                         $co{'title_short'} = chop_str($title, 50, 5);
3183                         last;
3184                 }
3185         }
3186         if (! defined $co{'title'} || $co{'title'} eq "") {
3187                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3188         }
3189         # remove added spaces
3190         foreach my $line (@commit_lines) {
3191                 $line =~ s/^    //;
3192         }
3193         $co{'comment'} = \@commit_lines;
3194
3195         my $age = time - $co{'committer_epoch'};
3196         $co{'age'} = $age;
3197         $co{'age_string'} = age_string($age);
3198         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3199         if ($age > 60*60*24*7*2) {
3200                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3201                 $co{'age_string_age'} = $co{'age_string'};
3202         } else {
3203                 $co{'age_string_date'} = $co{'age_string'};
3204                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3205         }
3206         return %co;
3207 }
3208
3209 sub parse_commit {
3210         my ($commit_id) = @_;
3211         my %co;
3212
3213         local $/ = "\0";
3214
3215         open my $fd, "-|", git_cmd(), "rev-list",
3216                 "--parents",
3217                 "--header",
3218                 "--max-count=1",
3219                 $commit_id,
3220                 "--",
3221                 or die_error(500, "Open git-rev-list failed");
3222         %co = parse_commit_text(<$fd>, 1);
3223         close $fd;
3224
3225         return %co;
3226 }
3227
3228 sub parse_commits {
3229         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3230         my @cos;
3231
3232         $maxcount ||= 1;
3233         $skip ||= 0;
3234
3235         local $/ = "\0";
3236
3237         open my $fd, "-|", git_cmd(), "rev-list",
3238                 "--header",
3239                 @args,
3240                 ("--max-count=" . $maxcount),
3241                 ("--skip=" . $skip),
3242                 @extra_options,
3243                 $commit_id,
3244                 "--",
3245                 ($filename ? ($filename) : ())
3246                 or die_error(500, "Open git-rev-list failed");
3247         while (my $line = <$fd>) {
3248                 my %co = parse_commit_text($line);
3249                 push @cos, \%co;
3250         }
3251         close $fd;
3252
3253         return wantarray ? @cos : \@cos;
3254 }
3255
3256 # parse line of git-diff-tree "raw" output
3257 sub parse_difftree_raw_line {
3258         my $line = shift;
3259         my %res;
3260
3261         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3262         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3263         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3264                 $res{'from_mode'} = $1;
3265                 $res{'to_mode'} = $2;
3266                 $res{'from_id'} = $3;
3267                 $res{'to_id'} = $4;
3268                 $res{'status'} = $5;
3269                 $res{'similarity'} = $6;
3270                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3271                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3272                 } else {
3273                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3274                 }
3275         }
3276         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3277         # combined diff (for merge commit)
3278         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3279                 $res{'nparents'}  = length($1);
3280                 $res{'from_mode'} = [ split(' ', $2) ];
3281                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3282                 $res{'from_id'} = [ split(' ', $3) ];
3283                 $res{'to_id'} = pop @{$res{'from_id'}};
3284                 $res{'status'} = [ split('', $4) ];
3285                 $res{'to_file'} = unquote($5);
3286         }
3287         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3288         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3289                 $res{'commit'} = $1;
3290         }
3291
3292         return wantarray ? %res : \%res;
3293 }
3294
3295 # wrapper: return parsed line of git-diff-tree "raw" output
3296 # (the argument might be raw line, or parsed info)
3297 sub parsed_difftree_line {
3298         my $line_or_ref = shift;
3299
3300         if (ref($line_or_ref) eq "HASH") {
3301                 # pre-parsed (or generated by hand)
3302                 return $line_or_ref;
3303         } else {
3304                 return parse_difftree_raw_line($line_or_ref);
3305         }
3306 }
3307
3308 # parse line of git-ls-tree output
3309 sub parse_ls_tree_line {
3310         my $line = shift;
3311         my %opts = @_;
3312         my %res;
3313
3314         if ($opts{'-l'}) {
3315                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3316                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3317
3318                 $res{'mode'} = $1;
3319                 $res{'type'} = $2;
3320                 $res{'hash'} = $3;
3321                 $res{'size'} = $4;
3322                 if ($opts{'-z'}) {
3323                         $res{'name'} = $5;
3324                 } else {
3325                         $res{'name'} = unquote($5);
3326                 }
3327         } else {
3328                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3329                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3330
3331                 $res{'mode'} = $1;
3332                 $res{'type'} = $2;
3333                 $res{'hash'} = $3;
3334                 if ($opts{'-z'}) {
3335                         $res{'name'} = $4;
3336                 } else {
3337                         $res{'name'} = unquote($4);
3338                 }
3339         }
3340
3341         return wantarray ? %res : \%res;
3342 }
3343
3344 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3345 sub parse_from_to_diffinfo {
3346         my ($diffinfo, $from, $to, @parents) = @_;
3347
3348         if ($diffinfo->{'nparents'}) {
3349                 # combined diff
3350                 $from->{'file'} = [];
3351                 $from->{'href'} = [];
3352                 fill_from_file_info($diffinfo, @parents)
3353                         unless exists $diffinfo->{'from_file'};
3354                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3355                         $from->{'file'}[$i] =
3356                                 defined $diffinfo->{'from_file'}[$i] ?
3357                                         $diffinfo->{'from_file'}[$i] :
3358                                         $diffinfo->{'to_file'};
3359                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3360                                 $from->{'href'}[$i] = href(action=>"blob",
3361                                                            hash_base=>$parents[$i],
3362                                                            hash=>$diffinfo->{'from_id'}[$i],
3363                                                            file_name=>$from->{'file'}[$i]);
3364                         } else {
3365                                 $from->{'href'}[$i] = undef;
3366                         }
3367                 }
3368         } else {
3369                 # ordinary (not combined) diff
3370                 $from->{'file'} = $diffinfo->{'from_file'};
3371                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3372                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3373                                                hash=>$diffinfo->{'from_id'},
3374                                                file_name=>$from->{'file'});
3375                 } else {
3376                         delete $from->{'href'};
3377                 }
3378         }
3379
3380         $to->{'file'} = $diffinfo->{'to_file'};
3381         if (!is_deleted($diffinfo)) { # file exists in result
3382                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3383                                      hash=>$diffinfo->{'to_id'},
3384                                      file_name=>$to->{'file'});
3385         } else {
3386                 delete $to->{'href'};
3387         }
3388 }
3389
3390 ## ......................................................................
3391 ## parse to array of hashes functions
3392
3393 sub git_get_heads_list {
3394         my $limit = shift;
3395         my @headslist;
3396
3397         open my $fd, '-|', git_cmd(), 'for-each-ref',
3398                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3399                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3400                 'refs/heads'
3401                 or return;
3402         while (my $line = <$fd>) {
3403                 my %ref_item;
3404
3405                 chomp $line;
3406                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3407                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3408                 my ($committer, $epoch, $tz) =
3409                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3410                 $ref_item{'fullname'}  = $name;
3411                 $name =~ s!^refs/heads/!!;
3412
3413                 $ref_item{'name'}  = $name;
3414                 $ref_item{'id'}    = $hash;
3415                 $ref_item{'title'} = $title || '(no commit message)';
3416                 $ref_item{'epoch'} = $epoch;
3417                 if ($epoch) {
3418                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3419                 } else {
3420                         $ref_item{'age'} = "unknown";
3421                 }
3422
3423                 push @headslist, \%ref_item;
3424         }
3425         close $fd;
3426
3427         return wantarray ? @headslist : \@headslist;
3428 }
3429
3430 sub git_get_tags_list {
3431         my $limit = shift;
3432         my @tagslist;
3433
3434         open my $fd, '-|', git_cmd(), 'for-each-ref',
3435                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3436                 '--format=%(objectname) %(objecttype) %(refname) '.
3437                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3438                 'refs/tags'
3439                 or return;
3440         while (my $line = <$fd>) {
3441                 my %ref_item;
3442
3443                 chomp $line;
3444                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3445                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3446                 my ($creator, $epoch, $tz) =
3447                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3448                 $ref_item{'fullname'} = $name;
3449                 $name =~ s!^refs/tags/!!;
3450
3451                 $ref_item{'type'} = $type;
3452                 $ref_item{'id'} = $id;
3453                 $ref_item{'name'} = $name;
3454                 if ($type eq "tag") {
3455                         $ref_item{'subject'} = $title;
3456                         $ref_item{'reftype'} = $reftype;
3457                         $ref_item{'refid'}   = $refid;
3458                 } else {
3459                         $ref_item{'reftype'} = $type;
3460                         $ref_item{'refid'}   = $id;
3461                 }
3462
3463                 if ($type eq "tag" || $type eq "commit") {
3464                         $ref_item{'epoch'} = $epoch;
3465                         if ($epoch) {
3466                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3467                         } else {
3468                                 $ref_item{'age'} = "unknown";
3469                         }
3470                 }
3471
3472                 push @tagslist, \%ref_item;
3473         }
3474         close $fd;
3475
3476         return wantarray ? @tagslist : \@tagslist;
3477 }
3478
3479 ## ----------------------------------------------------------------------
3480 ## filesystem-related functions
3481
3482 sub get_file_owner {
3483         my $path = shift;
3484
3485         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3486         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3487         if (!defined $gcos) {
3488                 return undef;
3489         }
3490         my $owner = $gcos;
3491         $owner =~ s/[,;].*$//;
3492         return to_utf8($owner);
3493 }
3494
3495 # assume that file exists
3496 sub insert_file {
3497         my $filename = shift;
3498
3499         open my $fd, '<', $filename;
3500         print map { to_utf8($_) } <$fd>;
3501         close $fd;
3502 }
3503
3504 ## ......................................................................
3505 ## mimetype related functions
3506
3507 sub mimetype_guess_file {
3508         my $filename = shift;
3509         my $mimemap = shift;
3510         -r $mimemap or return undef;
3511
3512         my %mimemap;
3513         open(my $mh, '<', $mimemap) or return undef;
3514         while (<$mh>) {
3515                 next if m/^#/; # skip comments
3516                 my ($mimetype, $exts) = split(/\t+/);
3517                 if (defined $exts) {
3518                         my @exts = split(/\s+/, $exts);
3519                         foreach my $ext (@exts) {
3520                                 $mimemap{$ext} = $mimetype;
3521                         }
3522                 }
3523         }
3524         close($mh);
3525
3526         $filename =~ /\.([^.]*)$/;
3527         return $mimemap{$1};
3528 }
3529
3530 sub mimetype_guess {
3531         my $filename = shift;
3532         my $mime;
3533         $filename =~ /\./ or return undef;
3534
3535         if ($mimetypes_file) {
3536                 my $file = $mimetypes_file;
3537                 if ($file !~ m!^/!) { # if it is relative path
3538                         # it is relative to project
3539                         $file = "$projectroot/$project/$file";
3540                 }
3541                 $mime = mimetype_guess_file($filename, $file);
3542         }
3543         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3544         return $mime;
3545 }
3546
3547 sub blob_mimetype {
3548         my $fd = shift;
3549         my $filename = shift;
3550
3551         if ($filename) {
3552                 my $mime = mimetype_guess($filename);
3553                 $mime and return $mime;
3554         }
3555
3556         # just in case
3557         return $default_blob_plain_mimetype unless $fd;
3558
3559         if (-T $fd) {
3560                 return 'text/plain';
3561         } elsif (! $filename) {
3562                 return 'application/octet-stream';
3563         } elsif ($filename =~ m/\.png$/i) {
3564                 return 'image/png';
3565         } elsif ($filename =~ m/\.gif$/i) {
3566                 return 'image/gif';
3567         } elsif ($filename =~ m/\.jpe?g$/i) {
3568                 return 'image/jpeg';
3569         } else {
3570                 return 'application/octet-stream';
3571         }
3572 }
3573
3574 sub blob_contenttype {
3575         my ($fd, $file_name, $type) = @_;
3576
3577         $type ||= blob_mimetype($fd, $file_name);
3578         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3579                 $type .= "; charset=$default_text_plain_charset";
3580         }
3581
3582         return $type;
3583 }
3584
3585 # guess file syntax for syntax highlighting; return undef if no highlighting
3586 # the name of syntax can (in the future) depend on syntax highlighter used
3587 sub guess_file_syntax {
3588         my ($highlight, $mimetype, $file_name) = @_;
3589         return undef unless ($highlight && defined $file_name);
3590         my $basename = basename($file_name, '.in');
3591         return $highlight_basename{$basename}
3592                 if exists $highlight_basename{$basename};
3593
3594         $basename =~ /\.([^.]*)$/;
3595         my $ext = $1 or return undef;
3596         return $highlight_ext{$ext}
3597                 if exists $highlight_ext{$ext};
3598
3599         return undef;
3600 }
3601
3602 # run highlighter and return FD of its output,
3603 # or return original FD if no highlighting
3604 sub run_highlighter {
3605         my ($fd, $highlight, $syntax) = @_;
3606         return $fd unless ($highlight && defined $syntax);
3607
3608         close $fd
3609                 or die_error(404, "Reading blob failed");
3610         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3611                   quote_command($highlight_bin).
3612                   " --xhtml --fragment --syntax $syntax |"
3613                 or die_error(500, "Couldn't open file or run syntax highlighter");
3614         return $fd;
3615 }
3616
3617 ## ======================================================================
3618 ## functions printing HTML: header, footer, error page
3619
3620 sub get_page_title {
3621         my $title = to_utf8($site_name);
3622
3623         return $title unless (defined $project);
3624         $title .= " - " . to_utf8($project);
3625
3626         return $title unless (defined $action);
3627         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3628
3629         return $title unless (defined $file_name);
3630         $title .= " - " . esc_path($file_name);
3631         if ($action eq "tree" && $file_name !~ m|/$|) {
3632                 $title .= "/";
3633         }
3634
3635         return $title;
3636 }
3637
3638 # creates "Generating..." page when caching enabled and not in cache
3639 sub git_generating_data_html {
3640         my ($cache, $key, $lock_fh) = @_;
3641
3642         # whitelist of actions that should get "Generating..." page
3643         if (!action_outputs_html($action) ||
3644             browser_is_robot()) {
3645                 return;
3646         }
3647
3648         # Initial delay
3649         if ($generating_options{'startup_delay'} > 0) {
3650                 eval {
3651                         local $SIG{ALRM} = sub { die "alarm clock restart\n" }; # NB: \n required
3652                         alarm $generating_options{'startup_delay'};
3653                         flock($lock_fh, LOCK_SH); # blocking readers lock
3654                         alarm 0;
3655                 };
3656                 if ($@) {
3657                         # propagate unexpected errors
3658                         die $@ if $@ !~ /alarm clock restart/;
3659                 } else {
3660                         # we got response within 'startup_delay' timeout
3661                         return;
3662                 }
3663         }
3664
3665         my $title = "[Generating...] " . get_page_title();
3666         # TODO: the following line of code duplicates the one
3667         # in git_header_html, and it should probably be refactored.
3668         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3669
3670         # Use the trick that 'refresh' HTTP header equivalent (set via http-equiv)
3671         # with timeout of 0 seconds would redirect as soon as page is finished.
3672         # It assumes that browser would display partially received page.
3673         # This "Generating..." redirect page should not be cached (externally).
3674         my %no_cache = (
3675                 # HTTP/1.0
3676                 -Pragma => 'no-cache',
3677                 # HTTP/1.1
3678                 -Cache_Control => join(', ', qw(private no-cache no-store must-revalidate
3679                                                 max-age=0 pre-check=0 post-check=0)),
3680         );
3681         print STDOUT $cgi->header(-type => 'text/html', -charset => 'utf-8',
3682                                   -status=> '200 OK', -expires => 'now',
3683                                   %no_cache);
3684         print STDOUT <<"EOF";
3685 <?xml version="1.0" encoding="utf-8"?>
3686 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
3687                       "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3688 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3689 <!-- git web interface version $version -->
3690 <!-- git core binaries version $git_version -->
3691 <head>
3692 <meta http-equiv="content-type" content="text/html; charset=utf-8" />
3693 <meta http-equiv="refresh" content="0" />
3694 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version" />
3695 <meta name="robots" content="noindex, nofollow" />
3696 <title>$title</title>
3697 </head>
3698 <body>
3699 EOF
3700
3701         local $| = 1; # autoflush
3702         print STDOUT 'Generating...';
3703
3704         my $total_time = 0;
3705         my $interval = $generating_options{'print_interval'} || 1;
3706         my $timeout  = $generating_options{'timeout'};
3707         my $alarm_handler = sub {
3708                 local $! = 1;
3709                 print STDOUT '.';
3710                 $total_time += $interval;
3711                 if ($total_time > $timeout) {
3712                         die "timeout\n";
3713                 }
3714         };
3715         eval {
3716                 local $SIG{ALRM} = $alarm_handler;
3717                 Time::HiRes::alarm($interval, $interval);
3718                 my $lock_acquired;
3719                 do {
3720                         # loop is needed here because SIGALRM (from 'alarm')
3721                         # can interrupt process of acquiring lock
3722                         $lock_acquired = flock($lock_fh, LOCK_SH); # blocking readers lock
3723                 } until ($lock_acquired);
3724                 alarm 0;
3725         };
3726         # It doesn't really matter if we got lock, or timed-out
3727         # but we should re-throw unknown (unexpected) errors
3728         die $@ if ($@ and $@ !~ /timeout/);
3729
3730         print STDOUT <<"EOF";
3731
3732 </body>
3733 </html>
3734 EOF
3735
3736         # after refresh web browser would reload page and send new request
3737         goto DONE_GITWEB;
3738         #exit 0;
3739         #return;
3740 }
3741
3742 sub git_header_html {
3743         my $status = shift || "200 OK";
3744         my $expires = shift;
3745         my %opts = @_;
3746
3747         my $title = get_page_title();
3748         my $content_type;
3749         # require explicit support from the UA if we are to send the page as
3750         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3751         # we have to do this because MSIE sometimes globs '*/*', pretending to
3752         # support xhtml+xml but choking when it gets what it asked for.
3753         # Disable content-type negotiation when caching (use mimetype good for all).
3754         if (!$caching_enabled &&
3755             defined $cgi->http('HTTP_ACCEPT') &&
3756             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3757             $cgi->Accept('application/xhtml+xml') != 0) {
3758                 $content_type = 'application/xhtml+xml';
3759         } else {
3760                 $content_type = 'text/html';
3761         }
3762         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3763                            -status=> $status, -expires => $expires)
3764                 unless ($opts{'-no_http_header'});
3765         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3766         print <<EOF;
3767 <?xml version="1.0" encoding="utf-8"?>
3768 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3769 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3770 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3771 <!-- git core binaries version $git_version -->
3772 <head>
3773 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3774 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3775 <meta name="robots" content="index, nofollow"/>
3776 <title>$title</title>
3777 EOF
3778         # the stylesheet, favicon etc urls won't work correctly with path_info
3779         # unless we set the appropriate base URL
3780         # if caching is enabled we can get it from cache for path_info when it
3781         # is generated without path_info
3782         if ($ENV{'PATH_INFO'} || $caching_enabled) {
3783                 print "<base href=\"".esc_url($base_url)."\" />\n";
3784         }
3785         # print out each stylesheet that exist, providing backwards capability
3786         # for those people who defined $stylesheet in a config file
3787         if (defined $stylesheet) {
3788                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3789         } else {
3790                 foreach my $stylesheet (@stylesheets) {
3791                         next unless $stylesheet;
3792                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3793                 }
3794         }
3795         if (defined $project) {
3796                 my %href_params = get_feed_info();
3797                 if (!exists $href_params{'-title'}) {
3798                         $href_params{'-title'} = 'log';
3799                 }
3800
3801                 foreach my $format qw(RSS Atom) {
3802                         my $type = lc($format);
3803                         my %link_attr = (
3804                                 '-rel' => 'alternate',
3805                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3806                                 '-type' => "application/$type+xml"
3807                         );
3808
3809                         $href_params{'action'} = $type;
3810                         $link_attr{'-href'} = href(%href_params);
3811                         print "<link ".
3812                               "rel=\"$link_attr{'-rel'}\" ".
3813                               "title=\"$link_attr{'-title'}\" ".
3814                               "href=\"$link_attr{'-href'}\" ".
3815                               "type=\"$link_attr{'-type'}\" ".
3816                               "/>\n";
3817
3818                         $href_params{'extra_options'} = '--no-merges';
3819                         $link_attr{'-href'} = href(%href_params);
3820                         $link_attr{'-title'} .= ' (no merges)';
3821                         print "<link ".
3822                               "rel=\"$link_attr{'-rel'}\" ".
3823                               "title=\"$link_attr{'-title'}\" ".
3824                               "href=\"$link_attr{'-href'}\" ".
3825                               "type=\"$link_attr{'-type'}\" ".
3826                               "/>\n";
3827                 }
3828
3829         } else {
3830                 printf('<link rel="alternate" title="%s projects list" '.
3831                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3832                        $site_name, href(project=>undef, action=>"project_index"));
3833                 printf('<link rel="alternate" title="%s projects feeds" '.
3834                        'href="%s" type="text/x-opml" />'."\n",
3835                        $site_name, href(project=>undef, action=>"opml"));
3836         }
3837         if (defined $favicon) {
3838                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3839         }
3840
3841         print "</head>\n" .
3842               "<body>\n";
3843
3844         if (defined $site_header && -f $site_header) {
3845                 insert_file($site_header);
3846         }
3847
3848         print "<div class=\"page_header\">\n" .
3849               $cgi->a({-href => esc_url($logo_url),
3850                        -title => $logo_label},
3851                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3852         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3853         if (defined $project) {
3854                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3855                 if (defined $action) {
3856                         print " / $action";
3857                 }
3858                 print "\n";
3859         }
3860         print "</div>\n";
3861
3862         my $have_search = gitweb_check_feature('search');
3863         if (defined $project && $have_search) {
3864                 if (!defined $searchtext) {
3865                         $searchtext = "";
3866                 }
3867                 my $search_hash;
3868                 if (defined $hash_base) {
3869                         $search_hash = $hash_base;
3870                 } elsif (defined $hash) {
3871                         $search_hash = $hash;
3872                 } else {
3873                         $search_hash = "HEAD";
3874                 }
3875                 my $action = $my_uri;
3876                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3877                 if ($use_pathinfo) {
3878                         $action .= "/".esc_url($project);
3879                 }
3880                 print $cgi->startform(-method => "get", -action => $action) .
3881                       "<div class=\"search\">\n" .
3882                       (!$use_pathinfo &&
3883                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3884                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3885                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3886                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3887                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3888                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3889                       " search:\n",
3890                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3891                       "<span title=\"Extended regular expression\">" .
3892                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3893                                      -checked => $search_use_regexp) .
3894                       "</span>" .
3895                       "</div>" .
3896                       $cgi->end_form() . "\n";
3897         }
3898 }
3899
3900 sub git_footer_html {
3901         my $feed_class = 'rss_logo';
3902
3903         print "<div class=\"page_footer\">\n";
3904         if (defined $project) {
3905                 my $descr = git_get_project_description($project);
3906                 if (defined $descr) {
3907                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3908                 }
3909
3910                 my %href_params = get_feed_info();
3911                 if (!%href_params) {
3912                         $feed_class .= ' generic';
3913                 }
3914                 $href_params{'-title'} ||= 'log';
3915
3916                 foreach my $format qw(RSS Atom) {
3917                         $href_params{'action'} = lc($format);
3918                         print $cgi->a({-href => href(%href_params),
3919                                       -title => "$href_params{'-title'} $format feed",
3920                                       -class => $feed_class}, $format)."\n";
3921                 }
3922
3923         } else {
3924                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3925                               -class => $feed_class}, "OPML") . " ";
3926                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3927                               -class => $feed_class}, "TXT") . "\n";
3928         }
3929         print "</div>\n"; # class="page_footer"
3930
3931         # timing info doesn't make much sense with output (response) caching,
3932         # so when caching is enabled gitweb prints the time of page generation
3933         if ((defined $t0 || $caching_enabled) &&
3934             gitweb_check_feature('timed')) {
3935                 print "<div id=\"generating_info\">\n";
3936                 if ($caching_enabled) {
3937                         print 'This page was generated at '.
3938                               gmtime( time() )." GMT\n";
3939                 } else {
3940                         print 'This page took '.
3941                               '<span id="generating_time" class="time_span">'.
3942                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3943                               ' seconds </span>'.
3944                               ' and '.
3945                               '<span id="generating_cmd">'.
3946                               $number_of_git_cmds.
3947                               '</span> git commands '.
3948                               " to generate.\n";
3949                 }
3950                 print "</div>\n"; # class="page_footer"
3951         }
3952
3953         if (defined $site_footer && -f $site_footer) {
3954                 insert_file($site_footer);
3955         }
3956
3957         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3958         if (!$caching_enabled &&
3959             defined $action && $action eq 'blame_incremental') {
3960                 print qq!<script type="text/javascript">\n!.
3961                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3962                       qq!           "!. href() .qq!");\n!.
3963                       qq!</script>\n!;
3964         } elsif (gitweb_check_feature('javascript-actions')) {
3965                 print qq!<script type="text/javascript">\n!.
3966                       qq!window.onload = fixLinks;\n!.
3967                       qq!</script>\n!;
3968         }
3969
3970         print "</body>\n" .
3971               "</html>";
3972 }
3973
3974 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3975 # Example: die_error(404, 'Hash not found')
3976 # By convention, use the following status codes (as defined in RFC 2616):
3977 # 400: Invalid or missing CGI parameters, or
3978 #      requested object exists but has wrong type.
3979 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3980 #      this server or project.
3981 # 404: Requested object/revision/project doesn't exist.
3982 # 500: The server isn't configured properly, or
3983 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3984 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3985 # 503: The server is currently unavailable (because it is overloaded,
3986 #      or down for maintenance).  Generally, this is a temporary state.
3987 sub die_error {
3988         my $status = shift || 500;
3989         my $error = esc_html(shift) || "Internal Server Error";
3990         my $extra = shift;
3991         my %opts = @_;
3992
3993         my %http_responses = (
3994                 400 => '400 Bad Request',
3995                 403 => '403 Forbidden',
3996                 404 => '404 Not Found',
3997                 500 => '500 Internal Server Error',
3998                 503 => '503 Service Unavailable',
3999         );
4000
4001         # Do not cache error pages
4002         capture_stop($cache, $capture) if ($capture && $caching_enabled);
4003
4004         git_header_html($http_responses{$status}, undef, %opts);
4005         print <<EOF;
4006 <div class="page_body">
4007 <br /><br />
4008 $status - $error
4009 <br />
4010 EOF
4011         if (defined $extra) {
4012                 print "<hr />\n" .
4013                       "$extra\n";
4014         }
4015         print "</div>\n";
4016
4017         git_footer_html();
4018         goto DONE_GITWEB
4019                 unless ($opts{'-error_handler'});
4020 }
4021
4022 ## ----------------------------------------------------------------------
4023 ## functions printing or outputting HTML: navigation
4024
4025 sub git_print_page_nav {
4026         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4027         $extra = '' if !defined $extra; # pager or formats
4028
4029         my @navs = qw(summary shortlog log commit commitdiff tree);
4030         if ($suppress) {
4031                 @navs = grep { $_ ne $suppress } @navs;
4032         }
4033
4034         my %arg = map { $_ => {action=>$_} } @navs;
4035         if (defined $head) {
4036                 for (qw(commit commitdiff)) {
4037                         $arg{$_}{'hash'} = $head;
4038                 }
4039                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4040                         for (qw(shortlog log)) {
4041                                 $arg{$_}{'hash'} = $head;
4042                         }
4043                 }
4044         }
4045
4046         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4047         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4048
4049         my @actions = gitweb_get_feature('actions');
4050         my %repl = (
4051                 '%' => '%',
4052                 'n' => $project,         # project name
4053                 'f' => $git_dir,         # project path within filesystem
4054                 'h' => $treehead || '',  # current hash ('h' parameter)
4055                 'b' => $treebase || '',  # hash base ('hb' parameter)
4056         );
4057         while (@actions) {
4058                 my ($label, $link, $pos) = splice(@actions,0,3);
4059                 # insert
4060                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4061                 # munch munch
4062                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4063                 $arg{$label}{'_href'} = $link;
4064         }
4065
4066         print "<div class=\"page_nav\">\n" .
4067                 (join " | ",
4068                  map { $_ eq $current ?
4069                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4070                  } @navs);
4071         print "<br/>\n$extra<br/>\n" .
4072               "</div>\n";
4073 }
4074
4075 sub format_paging_nav {
4076         my ($action, $page, $has_next_link) = @_;
4077         my $paging_nav;
4078
4079
4080         if ($page > 0) {
4081                 $paging_nav .=
4082                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4083                         " &sdot; " .
4084                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4085                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4086         } else {
4087                 $paging_nav .= "first &sdot; prev";
4088         }
4089
4090         if ($has_next_link) {
4091                 $paging_nav .= " &sdot; " .
4092                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4093                                  -accesskey => "n", -title => "Alt-n"}, "next");
4094         } else {
4095                 $paging_nav .= " &sdot; next";
4096         }
4097
4098         return $paging_nav;
4099 }
4100
4101 ## ......................................................................
4102 ## functions printing or outputting HTML: div
4103
4104 sub git_print_header_div {
4105         my ($action, $title, $hash, $hash_base) = @_;
4106         my %args = ();
4107
4108         $args{'action'} = $action;
4109         $args{'hash'} = $hash if $hash;
4110         $args{'hash_base'} = $hash_base if $hash_base;
4111
4112         print "<div class=\"header\">\n" .
4113               $cgi->a({-href => href(%args), -class => "title"},
4114               $title ? $title : $action) .
4115               "\n</div>\n";
4116 }
4117
4118 sub print_local_time {
4119         print format_local_time(@_);
4120 }
4121
4122 sub format_local_time {
4123         my $localtime = '';
4124         my %date = @_;
4125         if ($date{'hour_local'} < 6) {
4126                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4127                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4128         } else {
4129                 $localtime .= sprintf(" (%02d:%02d %s)",
4130                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4131         }
4132
4133         return $localtime;
4134 }
4135
4136 # Outputs the author name and date in long form
4137 sub git_print_authorship {
4138         my $co = shift;
4139         my %opts = @_;
4140         my $tag = $opts{-tag} || 'div';
4141         my $author = $co->{'author_name'};
4142
4143         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4144         print "<$tag class=\"author_date\">" .
4145               format_search_author($author, "author", esc_html($author)) .
4146               " [$ad{'rfc2822'}";
4147         print_local_time(%ad) if ($opts{-localtime});
4148         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
4149                   . "</$tag>\n";
4150 }
4151
4152 # Outputs table rows containing the full author or committer information,
4153 # in the format expected for 'commit' view (& similar).
4154 # Parameters are a commit hash reference, followed by the list of people
4155 # to output information for. If the list is empty it defaults to both
4156 # author and committer.
4157 sub git_print_authorship_rows {
4158         my $co = shift;
4159         # too bad we can't use @people = @_ || ('author', 'committer')
4160         my @people = @_;
4161         @people = ('author', 'committer') unless @people;
4162         foreach my $who (@people) {
4163                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4164                 print "<tr><td>$who</td><td>" .
4165                       format_search_author($co->{"${who}_name"}, $who,
4166                                esc_html($co->{"${who}_name"})) . " " .
4167                       format_search_author($co->{"${who}_email"}, $who,
4168                                esc_html("<" . $co->{"${who}_email"} . ">")) .
4169                       "</td><td rowspan=\"2\">" .
4170                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4171                       "</td></tr>\n" .
4172                       "<tr>" .
4173                       "<td></td><td> $wd{'rfc2822'}";
4174                 print_local_time(%wd);
4175                 print "</td>" .
4176                       "</tr>\n";
4177         }
4178 }
4179
4180 sub git_print_page_path {
4181         my $name = shift;
4182         my $type = shift;
4183         my $hb = shift;
4184
4185
4186         print "<div class=\"page_path\">";
4187         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4188                       -title => 'tree root'}, to_utf8("[$project]"));
4189         print " / ";
4190         if (defined $name) {
4191                 my @dirname = split '/', $name;
4192                 my $basename = pop @dirname;
4193                 my $fullname = '';
4194
4195                 foreach my $dir (@dirname) {
4196                         $fullname .= ($fullname ? '/' : '') . $dir;
4197                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4198                                                      hash_base=>$hb),
4199                                       -title => $fullname}, esc_path($dir));
4200                         print " / ";
4201                 }
4202                 if (defined $type && $type eq 'blob') {
4203                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4204                                                      hash_base=>$hb),
4205                                       -title => $name}, esc_path($basename));
4206                 } elsif (defined $type && $type eq 'tree') {
4207                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4208                                                      hash_base=>$hb),
4209                                       -title => $name}, esc_path($basename));
4210                         print " / ";
4211                 } else {
4212                         print esc_path($basename);
4213                 }
4214         }
4215         print "<br/></div>\n";
4216 }
4217
4218 sub git_print_log {
4219         my $log = shift;
4220         my %opts = @_;
4221
4222         if ($opts{'-remove_title'}) {
4223                 # remove title, i.e. first line of log
4224                 shift @$log;
4225         }
4226         # remove leading empty lines
4227         while (defined $log->[0] && $log->[0] eq "") {
4228                 shift @$log;
4229         }
4230
4231         # print log
4232         my $signoff = 0;
4233         my $empty = 0;
4234         foreach my $line (@$log) {
4235                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4236                         $signoff = 1;
4237                         $empty = 0;
4238                         if (! $opts{'-remove_signoff'}) {
4239                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4240                                 next;
4241                         } else {
4242                                 # remove signoff lines
4243                                 next;
4244                         }
4245                 } else {
4246                         $signoff = 0;
4247                 }
4248
4249                 # print only one empty line
4250                 # do not print empty line after signoff
4251                 if ($line eq "") {
4252                         next if ($empty || $signoff);
4253                         $empty = 1;
4254                 } else {
4255                         $empty = 0;
4256                 }
4257
4258                 print format_log_line_html($line) . "<br/>\n";
4259         }
4260
4261         if ($opts{'-final_empty_line'}) {
4262                 # end with single empty line
4263                 print "<br/>\n" unless $empty;
4264         }
4265 }
4266
4267 # return link target (what link points to)
4268 sub git_get_link_target {
4269         my $hash = shift;
4270         my $link_target;
4271
4272         # read link
4273         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4274                 or return;
4275         {
4276                 local $/ = undef;
4277                 $link_target = <$fd>;
4278         }
4279         close $fd
4280                 or return;
4281
4282         return $link_target;
4283 }
4284
4285 # given link target, and the directory (basedir) the link is in,
4286 # return target of link relative to top directory (top tree);
4287 # return undef if it is not possible (including absolute links).
4288 sub normalize_link_target {
4289         my ($link_target, $basedir) = @_;
4290
4291         # absolute symlinks (beginning with '/') cannot be normalized
4292         return if (substr($link_target, 0, 1) eq '/');
4293
4294         # normalize link target to path from top (root) tree (dir)
4295         my $path;
4296         if ($basedir) {
4297                 $path = $basedir . '/' . $link_target;
4298         } else {
4299                 # we are in top (root) tree (dir)
4300                 $path = $link_target;
4301         }
4302
4303         # remove //, /./, and /../
4304         my @path_parts;
4305         foreach my $part (split('/', $path)) {
4306                 # discard '.' and ''
4307                 next if (!$part || $part eq '.');
4308                 # handle '..'
4309                 if ($part eq '..') {
4310                         if (@path_parts) {
4311                                 pop @path_parts;
4312                         } else {
4313                                 # link leads outside repository (outside top dir)
4314                                 return;
4315                         }
4316                 } else {
4317                         push @path_parts, $part;
4318                 }
4319         }
4320         $path = join('/', @path_parts);
4321
4322         return $path;
4323 }
4324
4325 # print tree entry (row of git_tree), but without encompassing <tr> element
4326 sub git_print_tree_entry {
4327         my ($t, $basedir, $hash_base, $have_blame) = @_;
4328
4329         my %base_key = ();
4330         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4331
4332         # The format of a table row is: mode list link.  Where mode is
4333         # the mode of the entry, list is the name of the entry, an href,
4334         # and link is the action links of the entry.
4335
4336         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4337         if (exists $t->{'size'}) {
4338                 print "<td class=\"size\">$t->{'size'}</td>\n";
4339         }
4340         if ($t->{'type'} eq "blob") {
4341                 print "<td class=\"list\">" .
4342                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4343                                                file_name=>"$basedir$t->{'name'}", %base_key),
4344                                 -class => "list"}, esc_path($t->{'name'}));
4345                 if (S_ISLNK(oct $t->{'mode'})) {
4346                         my $link_target = git_get_link_target($t->{'hash'});
4347                         if ($link_target) {
4348                                 my $norm_target = normalize_link_target($link_target, $basedir);
4349                                 if (defined $norm_target) {
4350                                         print " -> " .
4351                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4352                                                                      file_name=>$norm_target),
4353                                                        -title => $norm_target}, esc_path($link_target));
4354                                 } else {
4355                                         print " -> " . esc_path($link_target);
4356                                 }
4357                         }
4358                 }
4359                 print "</td>\n";
4360                 print "<td class=\"link\">";
4361                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4362                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4363                               "blob");
4364                 if ($have_blame) {
4365                         print " | " .
4366                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4367                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4368                                       "blame");
4369                 }
4370                 if (defined $hash_base) {
4371                         print " | " .
4372                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4373                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4374                                       "history");
4375                 }
4376                 print " | " .
4377                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4378                                                file_name=>"$basedir$t->{'name'}")},
4379                                 "raw");
4380                 print "</td>\n";
4381
4382         } elsif ($t->{'type'} eq "tree") {
4383                 print "<td class=\"list\">";
4384                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4385                                              file_name=>"$basedir$t->{'name'}",
4386                                              %base_key)},
4387                               esc_path($t->{'name'}));
4388                 print "</td>\n";
4389                 print "<td class=\"link\">";
4390                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4391                                              file_name=>"$basedir$t->{'name'}",
4392                                              %base_key)},
4393                               "tree");
4394                 if (defined $hash_base) {
4395                         print " | " .
4396                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4397                                                      file_name=>"$basedir$t->{'name'}")},
4398                                       "history");
4399                 }
4400                 print "</td>\n";
4401         } else {
4402                 # unknown object: we can only present history for it
4403                 # (this includes 'commit' object, i.e. submodule support)
4404                 print "<td class=\"list\">" .
4405                       esc_path($t->{'name'}) .
4406                       "</td>\n";
4407                 print "<td class=\"link\">";
4408                 if (defined $hash_base) {
4409                         print $cgi->a({-href => href(action=>"history",
4410                                                      hash_base=>$hash_base,
4411                                                      file_name=>"$basedir$t->{'name'}")},
4412                                       "history");
4413                 }
4414                 print "</td>\n";
4415         }
4416 }
4417
4418 ## ......................................................................
4419 ## functions printing large fragments of HTML
4420
4421 # get pre-image filenames for merge (combined) diff
4422 sub fill_from_file_info {
4423         my ($diff, @parents) = @_;
4424
4425         $diff->{'from_file'} = [ ];
4426         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4427         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4428                 if ($diff->{'status'}[$i] eq 'R' ||
4429                     $diff->{'status'}[$i] eq 'C') {
4430                         $diff->{'from_file'}[$i] =
4431                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4432                 }
4433         }
4434
4435         return $diff;
4436 }
4437
4438 # is current raw difftree line of file deletion
4439 sub is_deleted {
4440         my $diffinfo = shift;
4441
4442         return $diffinfo->{'to_id'} eq ('0' x 40);
4443 }
4444
4445 # does patch correspond to [previous] difftree raw line
4446 # $diffinfo  - hashref of parsed raw diff format
4447 # $patchinfo - hashref of parsed patch diff format
4448 #              (the same keys as in $diffinfo)
4449 sub is_patch_split {
4450         my ($diffinfo, $patchinfo) = @_;
4451
4452         return defined $diffinfo && defined $patchinfo
4453                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4454 }
4455
4456
4457 sub git_difftree_body {
4458         my ($difftree, $hash, @parents) = @_;
4459         my ($parent) = $parents[0];
4460         my $have_blame = gitweb_check_feature('blame');
4461         print "<div class=\"list_head\">\n";
4462         if ($#{$difftree} > 10) {
4463                 print(($#{$difftree} + 1) . " files changed:\n");
4464         }
4465         print "</div>\n";
4466
4467         print "<table class=\"" .
4468               (@parents > 1 ? "combined " : "") .
4469               "diff_tree\">\n";
4470
4471         # header only for combined diff in 'commitdiff' view
4472         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4473         if ($has_header) {
4474                 # table header
4475                 print "<thead><tr>\n" .
4476                        "<th></th><th></th>\n"; # filename, patchN link
4477                 for (my $i = 0; $i < @parents; $i++) {
4478                         my $par = $parents[$i];
4479                         print "<th>" .
4480                               $cgi->a({-href => href(action=>"commitdiff",
4481                                                      hash=>$hash, hash_parent=>$par),
4482                                        -title => 'commitdiff to parent number ' .
4483                                                   ($i+1) . ': ' . substr($par,0,7)},
4484                                       $i+1) .
4485                               "&nbsp;</th>\n";
4486                 }
4487                 print "</tr></thead>\n<tbody>\n";
4488         }
4489
4490         my $alternate = 1;
4491         my $patchno = 0;
4492         foreach my $line (@{$difftree}) {
4493                 my $diff = parsed_difftree_line($line);
4494
4495                 if ($alternate) {
4496                         print "<tr class=\"dark\">\n";
4497                 } else {
4498                         print "<tr class=\"light\">\n";
4499                 }
4500                 $alternate ^= 1;
4501
4502                 if (exists $diff->{'nparents'}) { # combined diff
4503
4504                         fill_from_file_info($diff, @parents)
4505                                 unless exists $diff->{'from_file'};
4506
4507                         if (!is_deleted($diff)) {
4508                                 # file exists in the result (child) commit
4509                                 print "<td>" .
4510                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4511                                                              file_name=>$diff->{'to_file'},
4512                                                              hash_base=>$hash),
4513                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4514                                       "</td>\n";
4515                         } else {
4516                                 print "<td>" .
4517                                       esc_path($diff->{'to_file'}) .
4518                                       "</td>\n";
4519                         }
4520
4521                         if ($action eq 'commitdiff') {
4522                                 # link to patch
4523                                 $patchno++;
4524                                 print "<td class=\"link\">" .
4525                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4526                                       " | " .
4527                                       "</td>\n";
4528                         }
4529
4530                         my $has_history = 0;
4531                         my $not_deleted = 0;
4532                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4533                                 my $hash_parent = $parents[$i];
4534                                 my $from_hash = $diff->{'from_id'}[$i];
4535                                 my $from_path = $diff->{'from_file'}[$i];
4536                                 my $status = $diff->{'status'}[$i];
4537
4538                                 $has_history ||= ($status ne 'A');
4539                                 $not_deleted ||= ($status ne 'D');
4540
4541                                 if ($status eq 'A') {
4542                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4543                                 } elsif ($status eq 'D') {
4544                                         print "<td class=\"link\">" .
4545                                               $cgi->a({-href => href(action=>"blob",
4546                                                                      hash_base=>$hash,
4547                                                                      hash=>$from_hash,
4548                                                                      file_name=>$from_path)},
4549                                                       "blob" . ($i+1)) .
4550                                               " | </td>\n";
4551                                 } else {
4552                                         if ($diff->{'to_id'} eq $from_hash) {
4553                                                 print "<td class=\"link nochange\">";
4554                                         } else {
4555                                                 print "<td class=\"link\">";
4556                                         }
4557                                         print $cgi->a({-href => href(action=>"blobdiff",
4558                                                                      hash=>$diff->{'to_id'},
4559                                                                      hash_parent=>$from_hash,
4560                                                                      hash_base=>$hash,
4561                                                                      hash_parent_base=>$hash_parent,
4562                                                                      file_name=>$diff->{'to_file'},
4563                                                                      file_parent=>$from_path)},
4564                                                       "diff" . ($i+1)) .
4565                                               " | </td>\n";
4566                                 }
4567                         }
4568
4569                         print "<td class=\"link\">";
4570                         if ($not_deleted) {
4571                                 print $cgi->a({-href => href(action=>"blob",
4572                                                              hash=>$diff->{'to_id'},
4573                                                              file_name=>$diff->{'to_file'},
4574                                                              hash_base=>$hash)},
4575                                               "blob");
4576                                 print " | " if ($has_history);
4577                         }
4578                         if ($has_history) {
4579                                 print $cgi->a({-href => href(action=>"history",
4580                                                              file_name=>$diff->{'to_file'},
4581                                                              hash_base=>$hash)},
4582                                               "history");
4583                         }
4584                         print "</td>\n";
4585
4586                         print "</tr>\n";
4587                         next; # instead of 'else' clause, to avoid extra indent
4588                 }
4589                 # else ordinary diff
4590
4591                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4592                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4593                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4594                         $to_mode_oct = oct $diff->{'to_mode'};
4595                         if (S_ISREG($to_mode_oct)) { # only for regular file
4596                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4597                         }
4598                         $to_file_type = file_type($diff->{'to_mode'});
4599                 }
4600                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4601                         $from_mode_oct = oct $diff->{'from_mode'};
4602                         if (S_ISREG($to_mode_oct)) { # only for regular file
4603                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4604                         }
4605                         $from_file_type = file_type($diff->{'from_mode'});
4606                 }
4607
4608                 if ($diff->{'status'} eq "A") { # created
4609                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4610                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4611                         $mode_chng   .= "]</span>";
4612                         print "<td>";
4613                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4614                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4615                                       -class => "list"}, esc_path($diff->{'file'}));
4616                         print "</td>\n";
4617                         print "<td>$mode_chng</td>\n";
4618                         print "<td class=\"link\">";
4619                         if ($action eq 'commitdiff') {
4620                                 # link to patch
4621                                 $patchno++;
4622                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4623                                 print " | ";
4624                         }
4625                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4626                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4627                                       "blob");
4628                         print "</td>\n";
4629
4630                 } elsif ($diff->{'status'} eq "D") { # deleted
4631                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4632                         print "<td>";
4633                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4634                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4635                                        -class => "list"}, esc_path($diff->{'file'}));
4636                         print "</td>\n";
4637                         print "<td>$mode_chng</td>\n";
4638                         print "<td class=\"link\">";
4639                         if ($action eq 'commitdiff') {
4640                                 # link to patch
4641                                 $patchno++;
4642                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4643                                 print " | ";
4644                         }
4645                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4646                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4647                                       "blob") . " | ";
4648                         if ($have_blame) {
4649                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4650                                                              file_name=>$diff->{'file'})},
4651                                               "blame") . " | ";
4652                         }
4653                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4654                                                      file_name=>$diff->{'file'})},
4655                                       "history");
4656                         print "</td>\n";
4657
4658                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4659                         my $mode_chnge = "";
4660                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4661                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4662                                 if ($from_file_type ne $to_file_type) {
4663                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4664                                 }
4665                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4666                                         if ($from_mode_str && $to_mode_str) {
4667                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4668                                         } elsif ($to_mode_str) {
4669                                                 $mode_chnge .= " mode: $to_mode_str";
4670                                         }
4671                                 }
4672                                 $mode_chnge .= "]</span>\n";
4673                         }
4674                         print "<td>";
4675                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4676                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4677                                       -class => "list"}, esc_path($diff->{'file'}));
4678                         print "</td>\n";
4679                         print "<td>$mode_chnge</td>\n";
4680                         print "<td class=\"link\">";
4681                         if ($action eq 'commitdiff') {
4682                                 # link to patch
4683                                 $patchno++;
4684                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4685                                       " | ";
4686                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4687                                 # "commit" view and modified file (not onlu mode changed)
4688                                 print $cgi->a({-href => href(action=>"blobdiff",
4689                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4690                                                              hash_base=>$hash, hash_parent_base=>$parent,
4691                                                              file_name=>$diff->{'file'})},
4692                                               "diff") .
4693                                       " | ";
4694                         }
4695                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4696                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4697                                        "blob") . " | ";
4698                         if ($have_blame) {
4699                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4700                                                              file_name=>$diff->{'file'})},
4701                                               "blame") . " | ";
4702                         }
4703                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4704                                                      file_name=>$diff->{'file'})},
4705                                       "history");
4706                         print "</td>\n";
4707
4708                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4709                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4710                         my $nstatus = $status_name{$diff->{'status'}};
4711                         my $mode_chng = "";
4712                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4713                                 # mode also for directories, so we cannot use $to_mode_str
4714                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4715                         }
4716                         print "<td>" .
4717                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4718                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4719                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4720                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4721                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4722                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4723                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4724                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4725                               "<td class=\"link\">";
4726                         if ($action eq 'commitdiff') {
4727                                 # link to patch
4728                                 $patchno++;
4729                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4730                                       " | ";
4731                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4732                                 # "commit" view and modified file (not only pure rename or copy)
4733                                 print $cgi->a({-href => href(action=>"blobdiff",
4734                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4735                                                              hash_base=>$hash, hash_parent_base=>$parent,
4736                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4737                                               "diff") .
4738                                       " | ";
4739                         }
4740                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4741                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4742                                       "blob") . " | ";
4743                         if ($have_blame) {
4744                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4745                                                              file_name=>$diff->{'to_file'})},
4746                                               "blame") . " | ";
4747                         }
4748                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4749                                                     file_name=>$diff->{'to_file'})},
4750                                       "history");
4751                         print "</td>\n";
4752
4753                 } # we should not encounter Unmerged (U) or Unknown (X) status
4754                 print "</tr>\n";
4755         }
4756         print "</tbody>" if $has_header;
4757         print "</table>\n";
4758 }
4759
4760 sub git_patchset_body {
4761         my ($fd, $difftree, $hash, @hash_parents) = @_;
4762         my ($hash_parent) = $hash_parents[0];
4763
4764         my $is_combined = (@hash_parents > 1);
4765         my $patch_idx = 0;
4766         my $patch_number = 0;
4767         my $patch_line;
4768         my $diffinfo;
4769         my $to_name;
4770         my (%from, %to);
4771
4772         print "<div class=\"patchset\">\n";
4773
4774         # skip to first patch
4775         while ($patch_line = <$fd>) {
4776                 chomp $patch_line;
4777
4778                 last if ($patch_line =~ m/^diff /);
4779         }
4780
4781  PATCH:
4782         while ($patch_line) {
4783
4784                 # parse "git diff" header line
4785                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4786                         # $1 is from_name, which we do not use
4787                         $to_name = unquote($2);
4788                         $to_name =~ s!^b/!!;
4789                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4790                         # $1 is 'cc' or 'combined', which we do not use
4791                         $to_name = unquote($2);
4792                 } else {
4793                         $to_name = undef;
4794                 }
4795
4796                 # check if current patch belong to current raw line
4797                 # and parse raw git-diff line if needed
4798                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4799                         # this is continuation of a split patch
4800                         print "<div class=\"patch cont\">\n";
4801                 } else {
4802                         # advance raw git-diff output if needed
4803                         $patch_idx++ if defined $diffinfo;
4804
4805                         # read and prepare patch information
4806                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4807
4808                         # compact combined diff output can have some patches skipped
4809                         # find which patch (using pathname of result) we are at now;
4810                         if ($is_combined) {
4811                                 while ($to_name ne $diffinfo->{'to_file'}) {
4812                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4813                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4814                                               "</div>\n";  # class="patch"
4815
4816                                         $patch_idx++;
4817                                         $patch_number++;
4818
4819                                         last if $patch_idx > $#$difftree;
4820                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4821                                 }
4822                         }
4823
4824                         # modifies %from, %to hashes
4825                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4826
4827                         # this is first patch for raw difftree line with $patch_idx index
4828                         # we index @$difftree array from 0, but number patches from 1
4829                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4830                 }
4831
4832                 # git diff header
4833                 #assert($patch_line =~ m/^diff /) if DEBUG;
4834                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4835                 $patch_number++;
4836                 # print "git diff" header
4837                 print format_git_diff_header_line($patch_line, $diffinfo,
4838                                                   \%from, \%to);
4839
4840                 # print extended diff header
4841                 print "<div class=\"diff extended_header\">\n";
4842         EXTENDED_HEADER:
4843                 while ($patch_line = <$fd>) {
4844                         chomp $patch_line;
4845
4846                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4847
4848                         print format_extended_diff_header_line($patch_line, $diffinfo,
4849                                                                \%from, \%to);
4850                 }
4851                 print "</div>\n"; # class="diff extended_header"
4852
4853                 # from-file/to-file diff header
4854                 if (! $patch_line) {
4855                         print "</div>\n"; # class="patch"
4856                         last PATCH;
4857                 }
4858                 next PATCH if ($patch_line =~ m/^diff /);
4859                 #assert($patch_line =~ m/^---/) if DEBUG;
4860
4861                 my $last_patch_line = $patch_line;
4862                 $patch_line = <$fd>;
4863                 chomp $patch_line;
4864                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4865
4866                 print format_diff_from_to_header($last_patch_line, $patch_line,
4867                                                  $diffinfo, \%from, \%to,
4868                                                  @hash_parents);
4869
4870                 # the patch itself
4871         LINE:
4872                 while ($patch_line = <$fd>) {
4873                         chomp $patch_line;
4874
4875                         next PATCH if ($patch_line =~ m/^diff /);
4876
4877                         print format_diff_line($patch_line, \%from, \%to);
4878                 }
4879
4880         } continue {
4881                 print "</div>\n"; # class="patch"
4882         }
4883
4884         # for compact combined (--cc) format, with chunk and patch simplification
4885         # the patchset might be empty, but there might be unprocessed raw lines
4886         for (++$patch_idx if $patch_number > 0;
4887              $patch_idx < @$difftree;
4888              ++$patch_idx) {
4889                 # read and prepare patch information
4890                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4891
4892                 # generate anchor for "patch" links in difftree / whatchanged part
4893                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4894                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4895                       "</div>\n";  # class="patch"
4896
4897                 $patch_number++;
4898         }
4899
4900         if ($patch_number == 0) {
4901                 if (@hash_parents > 1) {
4902                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4903                 } else {
4904                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4905                 }
4906         }
4907
4908         print "</div>\n"; # class="patchset"
4909 }
4910
4911 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4912
4913 # fills project list info (age, description, owner, forks) for each
4914 # project in the list, removing invalid projects from returned list
4915 # NOTE: modifies $projlist, but does not remove entries from it
4916 sub fill_project_list_info {
4917         my ($projlist, $check_forks) = @_;
4918         my @projects;
4919
4920         my $show_ctags = gitweb_check_feature('ctags');
4921  PROJECT:
4922         foreach my $pr (@$projlist) {
4923                 my (@activity) = git_get_last_activity($pr->{'path'});
4924                 unless (@activity) {
4925                         next PROJECT;
4926                 }
4927                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4928                 if (!defined $pr->{'descr'}) {
4929                         my $descr = git_get_project_description($pr->{'path'}) || "";
4930                         $descr = to_utf8($descr);
4931                         $pr->{'descr_long'} = $descr;
4932                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4933                 }
4934                 if (!defined $pr->{'owner'}) {
4935                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4936                 }
4937                 if ($check_forks) {
4938                         my $pname = $pr->{'path'};
4939                         if (($pname =~ s/\.git$//) &&
4940                             ($pname !~ /\/$/) &&
4941                             (-d "$projectroot/$pname")) {
4942                                 $pr->{'forks'} = "-d $projectroot/$pname";
4943                         } else {
4944                                 $pr->{'forks'} = 0;
4945                         }
4946                 }
4947                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4948                 push @projects, $pr;
4949         }
4950
4951         return @projects;
4952 }
4953
4954 # print 'sort by' <th> element, generating 'sort by $name' replay link
4955 # if that order is not selected
4956 sub print_sort_th {
4957         print format_sort_th(@_);
4958 }
4959
4960 sub format_sort_th {
4961         my ($name, $order, $header) = @_;
4962         my $sort_th = "";
4963         $header ||= ucfirst($name);
4964
4965         if ($order eq $name) {
4966                 $sort_th .= "<th>$header</th>\n";
4967         } else {
4968                 $sort_th .= "<th>" .
4969                             $cgi->a({-href => href(-replay=>1, order=>$name),
4970                                      -class => "header"}, $header) .
4971                             "</th>\n";
4972         }
4973
4974         return $sort_th;
4975 }
4976
4977 sub git_project_list_body {
4978         # actually uses global variable $project
4979         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4980
4981         my $check_forks = gitweb_check_feature('forks');
4982         my @projects = fill_project_list_info($projlist, $check_forks);
4983
4984         $order ||= $default_projects_order;
4985         $from = 0 unless defined $from;
4986         $to = $#projects if (!defined $to || $#projects < $to);
4987
4988         my %order_info = (
4989                 project => { key => 'path', type => 'str' },
4990                 descr => { key => 'descr_long', type => 'str' },
4991                 owner => { key => 'owner', type => 'str' },
4992                 age => { key => 'age', type => 'num' }
4993         );
4994         my $oi = $order_info{$order};
4995         if ($oi->{'type'} eq 'str') {
4996                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4997         } else {
4998                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4999         }
5000
5001         my $show_ctags = gitweb_check_feature('ctags');
5002         if ($show_ctags) {
5003                 my %ctags;
5004                 foreach my $p (@projects) {
5005                         foreach my $ct (keys %{$p->{'ctags'}}) {
5006                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
5007                         }
5008                 }
5009                 my $cloud = git_populate_project_tagcloud(\%ctags);
5010                 print git_show_project_tagcloud($cloud, 64);
5011         }
5012
5013         print "<table class=\"project_list\">\n";
5014         unless ($no_header) {
5015                 print "<tr>\n";
5016                 if ($check_forks) {
5017                         print "<th></th>\n";
5018                 }
5019                 print_sort_th('project', $order, 'Project');
5020                 print_sort_th('descr', $order, 'Description');
5021                 print_sort_th('owner', $order, 'Owner');
5022                 print_sort_th('age', $order, 'Last Change');
5023                 print "<th></th>\n" . # for links
5024                       "</tr>\n";
5025         }
5026         my $alternate = 1;
5027         my $tagfilter = $cgi->param('by_tag');
5028         for (my $i = $from; $i <= $to; $i++) {
5029                 my $pr = $projects[$i];
5030
5031                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
5032                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
5033                         and not $pr->{'descr_long'} =~ /$searchtext/;
5034                 # Weed out forks or non-matching entries of search
5035                 if ($check_forks) {
5036                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
5037                         $forkbase="^$forkbase" if $forkbase;
5038                         next if not $searchtext and not $tagfilter and $show_ctags
5039                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
5040                 }
5041
5042                 if ($alternate) {
5043                         print "<tr class=\"dark\">\n";
5044                 } else {
5045                         print "<tr class=\"light\">\n";
5046                 }
5047                 $alternate ^= 1;
5048                 if ($check_forks) {
5049                         print "<td>";
5050                         if ($pr->{'forks'}) {
5051                                 print "<!-- $pr->{'forks'} -->\n";
5052                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
5053                         }
5054                         print "</td>\n";
5055                 }
5056                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5057                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5058                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5059                                         -class => "list", -title => $pr->{'descr_long'}},
5060                                         esc_html($pr->{'descr'})) . "</td>\n" .
5061                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5062                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5063                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5064                       "<td class=\"link\">" .
5065                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5066                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5067                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5068                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5069                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5070                       "</td>\n" .
5071                       "</tr>\n";
5072         }
5073         if (defined $extra) {
5074                 print "<tr>\n";
5075                 if ($check_forks) {
5076                         print "<td></td>\n";
5077                 }
5078                 print "<td colspan=\"5\">$extra</td>\n" .
5079                       "</tr>\n";
5080         }
5081         print "</table>\n";
5082 }
5083
5084 sub git_log_body {
5085         # uses global variable $project
5086         my ($commitlist, $from, $to, $refs, $extra) = @_;
5087
5088         $from = 0 unless defined $from;
5089         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5090
5091         for (my $i = 0; $i <= $to; $i++) {
5092                 my %co = %{$commitlist->[$i]};
5093                 next if !%co;
5094                 my $commit = $co{'id'};
5095                 my $ref = format_ref_marker($refs, $commit);
5096                 my %ad = parse_date($co{'author_epoch'});
5097                 git_print_header_div('commit',
5098                                "<span class=\"age\">$co{'age_string'}</span>" .
5099                                esc_html($co{'title'}) . $ref,
5100                                $commit);
5101                 print "<div class=\"title_text\">\n" .
5102                       "<div class=\"log_link\">\n" .
5103                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5104                       " | " .
5105                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5106                       " | " .
5107                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5108                       "<br/>\n" .
5109                       "</div>\n";
5110                       git_print_authorship(\%co, -tag => 'span');
5111                       print "<br/>\n</div>\n";
5112
5113                 print "<div class=\"log_body\">\n";
5114                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5115                 print "</div>\n";
5116         }
5117         if ($extra) {
5118                 print "<div class=\"page_nav\">\n";
5119                 print "$extra\n";
5120                 print "</div>\n";
5121         }
5122 }
5123
5124 sub git_shortlog_body {
5125         # uses global variable $project
5126         my ($commitlist, $from, $to, $refs, $extra) = @_;
5127
5128         $from = 0 unless defined $from;
5129         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5130
5131         print "<table class=\"shortlog\">\n";
5132         my $alternate = 1;
5133         for (my $i = $from; $i <= $to; $i++) {
5134                 my %co = %{$commitlist->[$i]};
5135                 my $commit = $co{'id'};
5136                 my $ref = format_ref_marker($refs, $commit);
5137                 if ($alternate) {
5138                         print "<tr class=\"dark\">\n";
5139                 } else {
5140                         print "<tr class=\"light\">\n";
5141                 }
5142                 $alternate ^= 1;
5143                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5144                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5145                       format_author_html('td', \%co, 10) . "<td>";
5146                 print format_subject_html($co{'title'}, $co{'title_short'},
5147                                           href(action=>"commit", hash=>$commit), $ref);
5148                 print "</td>\n" .
5149                       "<td class=\"link\">" .
5150                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5151                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5152                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5153                 my $snapshot_links = format_snapshot_links($commit);
5154                 if (defined $snapshot_links) {
5155                         print " | " . $snapshot_links;
5156                 }
5157                 print "</td>\n" .
5158                       "</tr>\n";
5159         }
5160         if (defined $extra) {
5161                 print "<tr>\n" .
5162                       "<td colspan=\"4\">$extra</td>\n" .
5163                       "</tr>\n";
5164         }
5165         print "</table>\n";
5166 }
5167
5168 sub git_history_body {
5169         # Warning: assumes constant type (blob or tree) during history
5170         my ($commitlist, $from, $to, $refs, $extra,
5171             $file_name, $file_hash, $ftype) = @_;
5172
5173         $from = 0 unless defined $from;
5174         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5175
5176         print "<table class=\"history\">\n";
5177         my $alternate = 1;
5178         for (my $i = $from; $i <= $to; $i++) {
5179                 my %co = %{$commitlist->[$i]};
5180                 if (!%co) {
5181                         next;
5182                 }
5183                 my $commit = $co{'id'};
5184
5185                 my $ref = format_ref_marker($refs, $commit);
5186
5187                 if ($alternate) {
5188                         print "<tr class=\"dark\">\n";
5189                 } else {
5190                         print "<tr class=\"light\">\n";
5191                 }
5192                 $alternate ^= 1;
5193                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5194         # shortlog:   format_author_html('td', \%co, 10)
5195                       format_author_html('td', \%co, 15, 3) . "<td>";
5196                 # originally git_history used chop_str($co{'title'}, 50)
5197                 print format_subject_html($co{'title'}, $co{'title_short'},
5198                                           href(action=>"commit", hash=>$commit), $ref);
5199                 print "</td>\n" .
5200                       "<td class=\"link\">" .
5201                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5202                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5203
5204                 if ($ftype eq 'blob') {
5205                         my $blob_current = $file_hash;
5206                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5207                         if (defined $blob_current && defined $blob_parent &&
5208                                         $blob_current ne $blob_parent) {
5209                                 print " | " .
5210                                         $cgi->a({-href => href(action=>"blobdiff",
5211                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5212                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5213                                                                file_name=>$file_name)},
5214                                                 "diff to current");
5215                         }
5216                 }
5217                 print "</td>\n" .
5218                       "</tr>\n";
5219         }
5220         if (defined $extra) {
5221                 print "<tr>\n" .
5222                       "<td colspan=\"4\">$extra</td>\n" .
5223                       "</tr>\n";
5224         }
5225         print "</table>\n";
5226 }
5227
5228 sub git_tags_body {
5229         # uses global variable $project
5230         my ($taglist, $from, $to, $extra) = @_;
5231         $from = 0 unless defined $from;
5232         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5233
5234         print "<table class=\"tags\">\n";
5235         my $alternate = 1;
5236         for (my $i = $from; $i <= $to; $i++) {
5237                 my $entry = $taglist->[$i];
5238                 my %tag = %$entry;
5239                 my $comment = $tag{'subject'};
5240                 my $comment_short;
5241                 if (defined $comment) {
5242                         $comment_short = chop_str($comment, 30, 5);
5243                 }
5244                 if ($alternate) {
5245                         print "<tr class=\"dark\">\n";
5246                 } else {
5247                         print "<tr class=\"light\">\n";
5248                 }
5249                 $alternate ^= 1;
5250                 if (defined $tag{'age'}) {
5251                         print "<td><i>$tag{'age'}</i></td>\n";
5252                 } else {
5253                         print "<td></td>\n";
5254                 }
5255                 print "<td>" .
5256                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5257                                -class => "list name"}, esc_html($tag{'name'})) .
5258                       "</td>\n" .
5259                       "<td>";
5260                 if (defined $comment) {
5261                         print format_subject_html($comment, $comment_short,
5262                                                   href(action=>"tag", hash=>$tag{'id'}));
5263                 }
5264                 print "</td>\n" .
5265                       "<td class=\"selflink\">";
5266                 if ($tag{'type'} eq "tag") {
5267                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5268                 } else {
5269                         print "&nbsp;";
5270                 }
5271                 print "</td>\n" .
5272                       "<td class=\"link\">" . " | " .
5273                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5274                 if ($tag{'reftype'} eq "commit") {
5275                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5276                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5277                 } elsif ($tag{'reftype'} eq "blob") {
5278                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5279                 }
5280                 print "</td>\n" .
5281                       "</tr>";
5282         }
5283         if (defined $extra) {
5284                 print "<tr>\n" .
5285                       "<td colspan=\"5\">$extra</td>\n" .
5286                       "</tr>\n";
5287         }
5288         print "</table>\n";
5289 }
5290
5291 sub git_heads_body {
5292         # uses global variable $project
5293         my ($headlist, $head, $from, $to, $extra) = @_;
5294         $from = 0 unless defined $from;
5295         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5296
5297         print "<table class=\"heads\">\n";
5298         my $alternate = 1;
5299         for (my $i = $from; $i <= $to; $i++) {
5300                 my $entry = $headlist->[$i];
5301                 my %ref = %$entry;
5302                 my $curr = $ref{'id'} eq $head;
5303                 if ($alternate) {
5304                         print "<tr class=\"dark\">\n";
5305                 } else {
5306                         print "<tr class=\"light\">\n";
5307                 }
5308                 $alternate ^= 1;
5309                 print "<td><i>$ref{'age'}</i></td>\n" .
5310                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5311                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5312                                -class => "list name"},esc_html($ref{'name'})) .
5313                       "</td>\n" .
5314                       "<td class=\"link\">" .
5315                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5316                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5317                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
5318                       "</td>\n" .
5319                       "</tr>";
5320         }
5321         if (defined $extra) {
5322                 print "<tr>\n" .
5323                       "<td colspan=\"3\">$extra</td>\n" .
5324                       "</tr>\n";
5325         }
5326         print "</table>\n";
5327 }
5328
5329 sub git_search_grep_body {
5330         my ($commitlist, $from, $to, $extra) = @_;
5331         $from = 0 unless defined $from;
5332         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5333
5334         print "<table class=\"commit_search\">\n";
5335         my $alternate = 1;
5336         for (my $i = $from; $i <= $to; $i++) {
5337                 my %co = %{$commitlist->[$i]};
5338                 if (!%co) {
5339                         next;
5340                 }
5341                 my $commit = $co{'id'};
5342                 if ($alternate) {
5343                         print "<tr class=\"dark\">\n";
5344                 } else {
5345                         print "<tr class=\"light\">\n";
5346                 }
5347                 $alternate ^= 1;
5348                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5349                       format_author_html('td', \%co, 15, 5) .
5350                       "<td>" .
5351                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5352                                -class => "list subject"},
5353                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5354                 my $comment = $co{'comment'};
5355                 foreach my $line (@$comment) {
5356                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5357                                 my ($lead, $match, $trail) = ($1, $2, $3);
5358                                 $match = chop_str($match, 70, 5, 'center');
5359                                 my $contextlen = int((80 - length($match))/2);
5360                                 $contextlen = 30 if ($contextlen > 30);
5361                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5362                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5363
5364                                 $lead  = esc_html($lead);
5365                                 $match = esc_html($match);
5366                                 $trail = esc_html($trail);
5367
5368                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5369                         }
5370                 }
5371                 print "</td>\n" .
5372                       "<td class=\"link\">" .
5373                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5374                       " | " .
5375                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5376                       " | " .
5377                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5378                 print "</td>\n" .
5379                       "</tr>\n";
5380         }
5381         if (defined $extra) {
5382                 print "<tr>\n" .
5383                       "<td colspan=\"3\">$extra</td>\n" .
5384                       "</tr>\n";
5385         }
5386         print "</table>\n";
5387 }
5388
5389 ## ======================================================================
5390 ## ======================================================================
5391 ## actions
5392
5393 sub git_project_list {
5394         my $order = $input_params{'order'};
5395         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5396                 die_error(400, "Unknown order parameter");
5397         }
5398
5399         my @list = git_get_projects_list();
5400         if (!@list) {
5401                 die_error(404, "No projects found");
5402         }
5403
5404         git_header_html();
5405         if (defined $home_text && -f $home_text) {
5406                 print "<div class=\"index_include\">\n";
5407                 insert_file($home_text);
5408                 print "</div>\n";
5409         }
5410         print $cgi->startform(-method => "get") .
5411               "<p class=\"projsearch\">Search:\n" .
5412               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5413               "</p>" .
5414               $cgi->end_form() . "\n";
5415         git_project_list_body(\@list, $order);
5416         git_footer_html();
5417 }
5418
5419 sub git_forks {
5420         my $order = $input_params{'order'};
5421         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5422                 die_error(400, "Unknown order parameter");
5423         }
5424
5425         my @list = git_get_projects_list($project);
5426         if (!@list) {
5427                 die_error(404, "No forks found");
5428         }
5429
5430         git_header_html();
5431         git_print_page_nav('','');
5432         git_print_header_div('summary', "$project forks");
5433         git_project_list_body(\@list, $order);
5434         git_footer_html();
5435 }
5436
5437 sub git_project_index {
5438         my @projects = git_get_projects_list($project);
5439
5440         print $cgi->header(
5441                 -type => 'text/plain',
5442                 -charset => 'utf-8',
5443                 -content_disposition => 'inline; filename="index.aux"');
5444
5445         foreach my $pr (@projects) {
5446                 if (!exists $pr->{'owner'}) {
5447                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5448                 }
5449
5450                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5451                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5452                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5453                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5454                 $path  =~ s/ /\+/g;
5455                 $owner =~ s/ /\+/g;
5456
5457                 print "$path $owner\n";
5458         }
5459 }
5460
5461 sub git_summary {
5462         my $descr = git_get_project_description($project) || "none";
5463         my %co = parse_commit("HEAD");
5464         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5465         my $head = $co{'id'};
5466
5467         my $owner = git_get_project_owner($project);
5468
5469         my $refs = git_get_references();
5470         # These get_*_list functions return one more to allow us to see if
5471         # there are more ...
5472         my @taglist  = git_get_tags_list(16);
5473         my @headlist = git_get_heads_list(16);
5474         my @forklist;
5475         my $check_forks = gitweb_check_feature('forks');
5476
5477         if ($check_forks) {
5478                 @forklist = git_get_projects_list($project);
5479         }
5480
5481         git_header_html();
5482         git_print_page_nav('summary','', $head);
5483
5484         print "<div class=\"title\">&nbsp;</div>\n";
5485         print "<table class=\"projects_list\">\n" .
5486               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5487               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5488         if (defined $cd{'rfc2822'}) {
5489                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5490         }
5491
5492         # use per project git URL list in $projectroot/$project/cloneurl
5493         # or make project git URL from git base URL and project name
5494         my $url_tag = "URL";
5495         my @url_list = git_get_project_url_list($project);
5496         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5497         foreach my $git_url (@url_list) {
5498                 next unless $git_url;
5499                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5500                 $url_tag = "";
5501         }
5502
5503         # Tag cloud
5504         my $show_ctags = gitweb_check_feature('ctags');
5505         if ($show_ctags) {
5506                 my $ctags = git_get_project_ctags($project);
5507                 my $cloud = git_populate_project_tagcloud($ctags);
5508                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5509                 print "</td>\n<td>" unless %$ctags;
5510                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5511                 print "</td>\n<td>" if %$ctags;
5512                 print git_show_project_tagcloud($cloud, 48);
5513                 print "</td></tr>";
5514         }
5515
5516         print "</table>\n";
5517
5518         # If XSS prevention is on, we don't include README.html.
5519         # TODO: Allow a readme in some safe format.
5520         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5521                 print "<div class=\"title\">readme</div>\n" .
5522                       "<div class=\"readme\">\n";
5523                 insert_file("$projectroot/$project/README.html");
5524                 print "\n</div>\n"; # class="readme"
5525         }
5526
5527         # we need to request one more than 16 (0..15) to check if
5528         # those 16 are all
5529         my @commitlist = $head ? parse_commits($head, 17) : ();
5530         if (@commitlist) {
5531                 git_print_header_div('shortlog');
5532                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5533                                   $#commitlist <=  15 ? undef :
5534                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5535         }
5536
5537         if (@taglist) {
5538                 git_print_header_div('tags');
5539                 git_tags_body(\@taglist, 0, 15,
5540                               $#taglist <=  15 ? undef :
5541                               $cgi->a({-href => href(action=>"tags")}, "..."));
5542         }
5543
5544         if (@headlist) {
5545                 git_print_header_div('heads');
5546                 git_heads_body(\@headlist, $head, 0, 15,
5547                                $#headlist <= 15 ? undef :
5548                                $cgi->a({-href => href(action=>"heads")}, "..."));
5549         }
5550
5551         if (@forklist) {
5552                 git_print_header_div('forks');
5553                 git_project_list_body(\@forklist, 'age', 0, 15,
5554                                       $#forklist <= 15 ? undef :
5555                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5556                                       'no_header');
5557         }
5558
5559         git_footer_html();
5560 }
5561
5562 sub git_tag {
5563         my %tag = parse_tag($hash);
5564
5565         if (! %tag) {
5566                 die_error(404, "Unknown tag object");
5567         }
5568
5569         my $head = git_get_head_hash($project);
5570         git_header_html();
5571         git_print_page_nav('','', $head,undef,$head);
5572         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5573         print "<div class=\"title_text\">\n" .
5574               "<table class=\"object_header\">\n" .
5575               "<tr>\n" .
5576               "<td>object</td>\n" .
5577               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5578                                $tag{'object'}) . "</td>\n" .
5579               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5580                                               $tag{'type'}) . "</td>\n" .
5581               "</tr>\n";
5582         if (defined($tag{'author'})) {
5583                 git_print_authorship_rows(\%tag, 'author');
5584         }
5585         print "</table>\n\n" .
5586               "</div>\n";
5587         print "<div class=\"page_body\">";
5588         my $comment = $tag{'comment'};
5589         foreach my $line (@$comment) {
5590                 chomp $line;
5591                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5592         }
5593         print "</div>\n";
5594         git_footer_html();
5595 }
5596
5597 sub git_blame_common {
5598         my $format = shift || 'porcelain';
5599         if ($format eq 'porcelain' && $cgi->param('js') &&
5600             !$caching_enabled) {
5601                 $format = 'incremental';
5602                 $action = 'blame_incremental'; # for page title etc
5603         }
5604
5605         # permissions
5606         gitweb_check_feature('blame')
5607                 or die_error(403, "Blame view not allowed");
5608
5609         # error checking
5610         die_error(400, "No file name given") unless $file_name;
5611         $hash_base ||= git_get_head_hash($project);
5612         die_error(404, "Couldn't find base commit") unless $hash_base;
5613         my %co = parse_commit($hash_base)
5614                 or die_error(404, "Commit not found");
5615         my $ftype = "blob";
5616         if (!defined $hash) {
5617                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5618                         or die_error(404, "Error looking up file");
5619         } else {
5620                 $ftype = git_get_type($hash);
5621                 if ($ftype !~ "blob") {
5622                         die_error(400, "Object is not a blob");
5623                 }
5624         }
5625
5626         my $fd;
5627         if ($format eq 'incremental') {
5628                 # get file contents (as base)
5629                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5630                         or die_error(500, "Open git-cat-file failed");
5631         } elsif ($format eq 'data') {
5632                 # run git-blame --incremental
5633                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5634                         $hash_base, "--", $file_name
5635                         or die_error(500, "Open git-blame --incremental failed");
5636         } else {
5637                 # run git-blame --porcelain
5638                 open $fd, "-|", git_cmd(), "blame", '-p',
5639                         $hash_base, '--', $file_name
5640                         or die_error(500, "Open git-blame --porcelain failed");
5641         }
5642
5643         # incremental blame data returns early
5644         if ($format eq 'data') {
5645                 print $cgi->header(
5646                         -type=>"text/plain", -charset => "utf-8",
5647                         -status=> "200 OK");
5648                 local $| = 1; # output autoflush
5649                 print while <$fd>;
5650                 close $fd
5651                         or print "ERROR $!\n";
5652
5653                 print 'END';
5654                 if (!$caching_enabled &&
5655                     defined $t0 && gitweb_check_feature('timed')) {
5656                         print ' '.
5657                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5658                               ' '.$number_of_git_cmds;
5659                 }
5660                 print "\n";
5661
5662                 return;
5663         }
5664
5665         # page header
5666         git_header_html();
5667         my $formats_nav =
5668                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5669                         "blob") .
5670                 " | ";
5671         if ($format eq 'incremental') {
5672                 $formats_nav .=
5673                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5674                                 "blame") . " (non-incremental)";
5675         } elsif (!$caching_enabled) {
5676                 $formats_nav .=
5677                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5678                                 "blame") . " (incremental)";
5679         }
5680         $formats_nav .=
5681                 " | " .
5682                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5683                         "history") .
5684                 " | " .
5685                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5686                         "HEAD");
5687         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5688         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5689         git_print_page_path($file_name, $ftype, $hash_base);
5690
5691         # page body
5692         if ($format eq 'incremental') {
5693                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5694                       "This page requires JavaScript to run.\n Use ".
5695                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5696                               'this page').
5697                       " instead.\n".
5698                       "</b></center></div>\n</noscript>\n";
5699
5700                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5701         }
5702
5703         print qq!<div class="page_body">\n!;
5704         print qq!<div id="progress_info">... / ...</div>\n!
5705                 if ($format eq 'incremental');
5706         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5707               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5708               qq!<thead>\n!.
5709               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5710               qq!</thead>\n!.
5711               qq!<tbody>\n!;
5712
5713         my @rev_color = qw(light dark);
5714         my $num_colors = scalar(@rev_color);
5715         my $current_color = 0;
5716
5717         if ($format eq 'incremental') {
5718                 my $color_class = $rev_color[$current_color];
5719
5720                 #contents of a file
5721                 my $linenr = 0;
5722         LINE:
5723                 while (my $line = <$fd>) {
5724                         chomp $line;
5725                         $linenr++;
5726
5727                         print qq!<tr id="l$linenr" class="$color_class">!.
5728                               qq!<td class="sha1"><a href=""> </a></td>!.
5729                               qq!<td class="linenr">!.
5730                               qq!<a class="linenr" href="">$linenr</a></td>!;
5731                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5732                         print qq!</tr>\n!;
5733                 }
5734
5735         } else { # porcelain, i.e. ordinary blame
5736                 my %metainfo = (); # saves information about commits
5737
5738                 # blame data
5739         LINE:
5740                 while (my $line = <$fd>) {
5741                         chomp $line;
5742                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5743                         # no <lines in group> for subsequent lines in group of lines
5744                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5745                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5746                         if (!exists $metainfo{$full_rev}) {
5747                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5748                         }
5749                         my $meta = $metainfo{$full_rev};
5750                         my $data;
5751                         while ($data = <$fd>) {
5752                                 chomp $data;
5753                                 last if ($data =~ s/^\t//); # contents of line
5754                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5755                                         $meta->{$1} = $2 unless exists $meta->{$1};
5756                                 }
5757                                 if ($data =~ /^previous /) {
5758                                         $meta->{'nprevious'}++;
5759                                 }
5760                         }
5761                         my $short_rev = substr($full_rev, 0, 8);
5762                         my $author = $meta->{'author'};
5763                         my %date =
5764                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5765                         my $date = $date{'iso-tz'};
5766                         if ($group_size) {
5767                                 $current_color = ($current_color + 1) % $num_colors;
5768                         }
5769                         my $tr_class = $rev_color[$current_color];
5770                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5771                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5772                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5773                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5774                         if ($group_size) {
5775                                 print "<td class=\"sha1\"";
5776                                 print " title=\"". esc_html($author) . ", $date\"";
5777                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5778                                 print ">";
5779                                 print $cgi->a({-href => href(action=>"commit",
5780                                                              hash=>$full_rev,
5781                                                              file_name=>$file_name)},
5782                                               esc_html($short_rev));
5783                                 if ($group_size >= 2) {
5784                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5785                                         if (@author_initials) {
5786                                                 print "<br />" .
5787                                                       esc_html(join('', @author_initials));
5788                                                 #           or join('.', ...)
5789                                         }
5790                                 }
5791                                 print "</td>\n";
5792                         }
5793                         # 'previous' <sha1 of parent commit> <filename at commit>
5794                         if (exists $meta->{'previous'} &&
5795                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5796                                 $meta->{'parent'} = $1;
5797                                 $meta->{'file_parent'} = unquote($2);
5798                         }
5799                         my $linenr_commit =
5800                                 exists($meta->{'parent'}) ?
5801                                 $meta->{'parent'} : $full_rev;
5802                         my $linenr_filename =
5803                                 exists($meta->{'file_parent'}) ?
5804                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5805                         my $blamed = href(action => 'blame',
5806                                           file_name => $linenr_filename,
5807                                           hash_base => $linenr_commit);
5808                         print "<td class=\"linenr\">";
5809                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5810                                         -class => "linenr" },
5811                                       esc_html($lineno));
5812                         print "</td>";
5813                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5814                         print "</tr>\n";
5815                 } # end while
5816
5817         }
5818
5819         # footer
5820         print "</tbody>\n".
5821               "</table>\n"; # class="blame"
5822         print "</div>\n";   # class="blame_body"
5823         close $fd
5824                 or print "Reading blob failed\n";
5825
5826         git_footer_html();
5827 }
5828
5829 sub git_blame {
5830         git_blame_common();
5831 }
5832
5833 sub git_blame_incremental {
5834         git_blame_common(!$caching_enabled ? 'incremental' : undef);
5835 }
5836
5837 sub git_blame_data {
5838         git_blame_common('data');
5839 }
5840
5841 sub git_tags {
5842         my $head = git_get_head_hash($project);
5843         git_header_html();
5844         git_print_page_nav('','', $head,undef,$head);
5845         git_print_header_div('summary', $project);
5846
5847         my @tagslist = git_get_tags_list();
5848         if (@tagslist) {
5849                 git_tags_body(\@tagslist);
5850         }
5851         git_footer_html();
5852 }
5853
5854 sub git_heads {
5855         my $head = git_get_head_hash($project);
5856         git_header_html();
5857         git_print_page_nav('','', $head,undef,$head);
5858         git_print_header_div('summary', $project);
5859
5860         my @headslist = git_get_heads_list();
5861         if (@headslist) {
5862                 git_heads_body(\@headslist, $head);
5863         }
5864         git_footer_html();
5865 }
5866
5867 sub git_blob_plain {
5868         my $type = shift;
5869         my $expires;
5870
5871         if (!defined $hash) {
5872                 if (defined $file_name) {
5873                         my $base = $hash_base || git_get_head_hash($project);
5874                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5875                                 or die_error(404, "Cannot find file");
5876                 } else {
5877                         die_error(400, "No file name defined");
5878                 }
5879         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5880                 # blobs defined by non-textual hash id's can be cached
5881                 $expires = "+1d";
5882         }
5883
5884         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5885                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5886
5887         # content-type (can include charset)
5888         $type = blob_contenttype($fd, $file_name, $type);
5889
5890         # "save as" filename, even when no $file_name is given
5891         my $save_as = "$hash";
5892         if (defined $file_name) {
5893                 $save_as = $file_name;
5894         } elsif ($type =~ m/^text\//) {
5895                 $save_as .= '.txt';
5896         }
5897
5898         # With XSS prevention on, blobs of all types except a few known safe
5899         # ones are served with "Content-Disposition: attachment" to make sure
5900         # they don't run in our security domain.  For certain image types,
5901         # blob view writes an <img> tag referring to blob_plain view, and we
5902         # want to be sure not to break that by serving the image as an
5903         # attachment (though Firefox 3 doesn't seem to care).
5904         my $sandbox = $prevent_xss &&
5905                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5906
5907         print $cgi->header(
5908                 -type => $type,
5909                 -expires => $expires,
5910                 -content_disposition =>
5911                         ($sandbox ? 'attachment' : 'inline')
5912                         . '; filename="' . $save_as . '"');
5913         local $/ = undef;
5914         binmode STDOUT, ':raw';
5915         print <$fd>;
5916         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5917         close $fd;
5918 }
5919
5920 sub git_blob {
5921         my $expires;
5922
5923         if (!defined $hash) {
5924                 if (defined $file_name) {
5925                         my $base = $hash_base || git_get_head_hash($project);
5926                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5927                                 or die_error(404, "Cannot find file");
5928                 } else {
5929                         die_error(400, "No file name defined");
5930                 }
5931         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5932                 # blobs defined by non-textual hash id's can be cached
5933                 $expires = "+1d";
5934         }
5935
5936         my $have_blame = gitweb_check_feature('blame');
5937         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5938                 or die_error(500, "Couldn't cat $file_name, $hash");
5939         my $mimetype = blob_mimetype($fd, $file_name);
5940         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5941         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5942                 close $fd;
5943                 return git_blob_plain($mimetype);
5944         }
5945         # we can have blame only for text/* mimetype
5946         $have_blame &&= ($mimetype =~ m!^text/!);
5947
5948         my $highlight = gitweb_check_feature('highlight');
5949         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5950         $fd = run_highlighter($fd, $highlight, $syntax)
5951                 if $syntax;
5952
5953         git_header_html(undef, $expires);
5954         my $formats_nav = '';
5955         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5956                 if (defined $file_name) {
5957                         if ($have_blame) {
5958                                 $formats_nav .=
5959                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5960                                                 "blame") .
5961                                         " | ";
5962                         }
5963                         $formats_nav .=
5964                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5965                                         "history") .
5966                                 " | " .
5967                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5968                                         "raw") .
5969                                 " | " .
5970                                 $cgi->a({-href => href(action=>"blob",
5971                                                        hash_base=>"HEAD", file_name=>$file_name)},
5972                                         "HEAD");
5973                 } else {
5974                         $formats_nav .=
5975                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5976                                         "raw");
5977                 }
5978                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5979                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5980         } else {
5981                 print "<div class=\"page_nav\">\n" .
5982                       "<br/><br/></div>\n" .
5983                       "<div class=\"title\">$hash</div>\n";
5984         }
5985         git_print_page_path($file_name, "blob", $hash_base);
5986         print "<div class=\"page_body\">\n";
5987         if ($mimetype =~ m!^image/!) {
5988                 print qq!<img type="$mimetype"!;
5989                 if ($file_name) {
5990                         print qq! alt="$file_name" title="$file_name"!;
5991                 }
5992                 print qq! src="! .
5993                       href(action=>"blob_plain", hash=>$hash,
5994                            hash_base=>$hash_base, file_name=>$file_name) .
5995                       qq!" />\n!;
5996         } else {
5997                 my $nr;
5998                 while (my $line = <$fd>) {
5999                         chomp $line;
6000                         $nr++;
6001                         $line = untabify($line);
6002                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6003                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6004                 }
6005         }
6006         close $fd
6007                 or print "Reading blob failed.\n";
6008         print "</div>";
6009         git_footer_html();
6010 }
6011
6012 sub git_tree {
6013         if (!defined $hash_base) {
6014                 $hash_base = "HEAD";
6015         }
6016         if (!defined $hash) {
6017                 if (defined $file_name) {
6018                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6019                 } else {
6020                         $hash = $hash_base;
6021                 }
6022         }
6023         die_error(404, "No such tree") unless defined($hash);
6024
6025         my $show_sizes = gitweb_check_feature('show-sizes');
6026         my $have_blame = gitweb_check_feature('blame');
6027
6028         my @entries = ();
6029         {
6030                 local $/ = "\0";
6031                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6032                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6033                         or die_error(500, "Open git-ls-tree failed");
6034                 @entries = map { chomp; $_ } <$fd>;
6035                 close $fd
6036                         or die_error(404, "Reading tree failed");
6037         }
6038
6039         my $refs = git_get_references();
6040         my $ref = format_ref_marker($refs, $hash_base);
6041         git_header_html();
6042         my $basedir = '';
6043         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6044                 my @views_nav = ();
6045                 if (defined $file_name) {
6046                         push @views_nav,
6047                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6048                                         "history"),
6049                                 $cgi->a({-href => href(action=>"tree",
6050                                                        hash_base=>"HEAD", file_name=>$file_name)},
6051                                         "HEAD"),
6052                 }
6053                 my $snapshot_links = format_snapshot_links($hash);
6054                 if (defined $snapshot_links) {
6055                         # FIXME: Should be available when we have no hash base as well.
6056                         push @views_nav, $snapshot_links;
6057                 }
6058                 git_print_page_nav('tree','', $hash_base, undef, undef,
6059                                    join(' | ', @views_nav));
6060                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6061         } else {
6062                 undef $hash_base;
6063                 print "<div class=\"page_nav\">\n";
6064                 print "<br/><br/></div>\n";
6065                 print "<div class=\"title\">$hash</div>\n";
6066         }
6067         if (defined $file_name) {
6068                 $basedir = $file_name;
6069                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6070                         $basedir .= '/';
6071                 }
6072                 git_print_page_path($file_name, 'tree', $hash_base);
6073         }
6074         print "<div class=\"page_body\">\n";
6075         print "<table class=\"tree\">\n";
6076         my $alternate = 1;
6077         # '..' (top directory) link if possible
6078         if (defined $hash_base &&
6079             defined $file_name && $file_name =~ m![^/]+$!) {
6080                 if ($alternate) {
6081                         print "<tr class=\"dark\">\n";
6082                 } else {
6083                         print "<tr class=\"light\">\n";
6084                 }
6085                 $alternate ^= 1;
6086
6087                 my $up = $file_name;
6088                 $up =~ s!/?[^/]+$!!;
6089                 undef $up unless $up;
6090                 # based on git_print_tree_entry
6091                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6092                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6093                 print '<td class="list">';
6094                 print $cgi->a({-href => href(action=>"tree",
6095                                              hash_base=>$hash_base,
6096                                              file_name=>$up)},
6097                               "..");
6098                 print "</td>\n";
6099                 print "<td class=\"link\"></td>\n";
6100
6101                 print "</tr>\n";
6102         }
6103         foreach my $line (@entries) {
6104                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6105
6106                 if ($alternate) {
6107                         print "<tr class=\"dark\">\n";
6108                 } else {
6109                         print "<tr class=\"light\">\n";
6110                 }
6111                 $alternate ^= 1;
6112
6113                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6114
6115                 print "</tr>\n";
6116         }
6117         print "</table>\n" .
6118               "</div>";
6119         git_footer_html();
6120 }
6121
6122 sub snapshot_name {
6123         my ($project, $hash) = @_;
6124
6125         # path/to/project.git  -> project
6126         # path/to/project/.git -> project
6127         my $name = to_utf8($project);
6128         $name =~ s,([^/])/*\.git$,$1,;
6129         $name = basename($name);
6130         # sanitize name
6131         $name =~ s/[[:cntrl:]]/?/g;
6132
6133         my $ver = $hash;
6134         if ($hash =~ /^[0-9a-fA-F]+$/) {
6135                 # shorten SHA-1 hash
6136                 my $full_hash = git_get_full_hash($project, $hash);
6137                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6138                         $ver = git_get_short_hash($project, $hash);
6139                 }
6140         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6141                 # tags don't need shortened SHA-1 hash
6142                 $ver = $1;
6143         } else {
6144                 # branches and other need shortened SHA-1 hash
6145                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6146                         $ver = $1;
6147                 }
6148                 $ver .= '-' . git_get_short_hash($project, $hash);
6149         }
6150         # in case of hierarchical branch names
6151         $ver =~ s!/!.!g;
6152
6153         # name = project-version_string
6154         $name = "$name-$ver";
6155
6156         return wantarray ? ($name, $name) : $name;
6157 }
6158
6159 sub git_snapshot {
6160         my $format = $input_params{'snapshot_format'};
6161         if (!@snapshot_fmts) {
6162                 die_error(403, "Snapshots not allowed");
6163         }
6164         # default to first supported snapshot format
6165         $format ||= $snapshot_fmts[0];
6166         if ($format !~ m/^[a-z0-9]+$/) {
6167                 die_error(400, "Invalid snapshot format parameter");
6168         } elsif (!exists($known_snapshot_formats{$format})) {
6169                 die_error(400, "Unknown snapshot format");
6170         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6171                 die_error(403, "Snapshot format not allowed");
6172         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6173                 die_error(403, "Unsupported snapshot format");
6174         }
6175
6176         my $type = git_get_type("$hash^{}");
6177         if (!$type) {
6178                 die_error(404, 'Object does not exist');
6179         }  elsif ($type eq 'blob') {
6180                 die_error(400, 'Object is not a tree-ish');
6181         }
6182
6183         my ($name, $prefix) = snapshot_name($project, $hash);
6184         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6185         my $cmd = quote_command(
6186                 git_cmd(), 'archive',
6187                 "--format=$known_snapshot_formats{$format}{'format'}",
6188                 "--prefix=$prefix/", $hash);
6189         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6190                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6191         }
6192
6193         $filename =~ s/(["\\])/\\$1/g;
6194         print $cgi->header(
6195                 -type => $known_snapshot_formats{$format}{'type'},
6196                 -content_disposition => 'inline; filename="' . $filename . '"',
6197                 -status => '200 OK');
6198
6199         open my $fd, "-|", $cmd
6200                 or die_error(500, "Execute git-archive failed");
6201         binmode STDOUT, ':raw';
6202         print <$fd>;
6203         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6204         close $fd;
6205 }
6206
6207 sub git_log_generic {
6208         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6209
6210         my $head = git_get_head_hash($project);
6211         if (!defined $base) {
6212                 $base = $head;
6213         }
6214         if (!defined $page) {
6215                 $page = 0;
6216         }
6217         my $refs = git_get_references();
6218
6219         my $commit_hash = $base;
6220         if (defined $parent) {
6221                 $commit_hash = "$parent..$base";
6222         }
6223         my @commitlist =
6224                 parse_commits($commit_hash, 101, (100 * $page),
6225                               defined $file_name ? ($file_name, "--full-history") : ());
6226
6227         my $ftype;
6228         if (!defined $file_hash && defined $file_name) {
6229                 # some commits could have deleted file in question,
6230                 # and not have it in tree, but one of them has to have it
6231                 for (my $i = 0; $i < @commitlist; $i++) {
6232                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6233                         last if defined $file_hash;
6234                 }
6235         }
6236         if (defined $file_hash) {
6237                 $ftype = git_get_type($file_hash);
6238         }
6239         if (defined $file_name && !defined $ftype) {
6240                 die_error(500, "Unknown type of object");
6241         }
6242         my %co;
6243         if (defined $file_name) {
6244                 %co = parse_commit($base)
6245                         or die_error(404, "Unknown commit object");
6246         }
6247
6248
6249         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6250         my $next_link = '';
6251         if ($#commitlist >= 100) {
6252                 $next_link =
6253                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6254                                  -accesskey => "n", -title => "Alt-n"}, "next");
6255         }
6256         my $patch_max = gitweb_get_feature('patches');
6257         if ($patch_max && !defined $file_name) {
6258                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6259                         $paging_nav .= " &sdot; " .
6260                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6261                                         "patches");
6262                 }
6263         }
6264
6265         git_header_html();
6266         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6267         if (defined $file_name) {
6268                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6269         } else {
6270                 git_print_header_div('summary', $project)
6271         }
6272         git_print_page_path($file_name, $ftype, $hash_base)
6273                 if (defined $file_name);
6274
6275         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6276                      $file_name, $file_hash, $ftype);
6277
6278         git_footer_html();
6279 }
6280
6281 sub git_log {
6282         git_log_generic('log', \&git_log_body,
6283                         $hash, $hash_parent);
6284 }
6285
6286 sub git_commit {
6287         $hash ||= $hash_base || "HEAD";
6288         my %co = parse_commit($hash)
6289             or die_error(404, "Unknown commit object");
6290
6291         my $parent  = $co{'parent'};
6292         my $parents = $co{'parents'}; # listref
6293
6294         # we need to prepare $formats_nav before any parameter munging
6295         my $formats_nav;
6296         if (!defined $parent) {
6297                 # --root commitdiff
6298                 $formats_nav .= '(initial)';
6299         } elsif (@$parents == 1) {
6300                 # single parent commit
6301                 $formats_nav .=
6302                         '(parent: ' .
6303                         $cgi->a({-href => href(action=>"commit",
6304                                                hash=>$parent)},
6305                                 esc_html(substr($parent, 0, 7))) .
6306                         ')';
6307         } else {
6308                 # merge commit
6309                 $formats_nav .=
6310                         '(merge: ' .
6311                         join(' ', map {
6312                                 $cgi->a({-href => href(action=>"commit",
6313                                                        hash=>$_)},
6314                                         esc_html(substr($_, 0, 7)));
6315                         } @$parents ) .
6316                         ')';
6317         }
6318         if (gitweb_check_feature('patches') && @$parents <= 1) {
6319                 $formats_nav .= " | " .
6320                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6321                                 "patch");
6322         }
6323
6324         if (!defined $parent) {
6325                 $parent = "--root";
6326         }
6327         my @difftree;
6328         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6329                 @diff_opts,
6330                 (@$parents <= 1 ? $parent : '-c'),
6331                 $hash, "--"
6332                 or die_error(500, "Open git-diff-tree failed");
6333         @difftree = map { chomp; $_ } <$fd>;
6334         close $fd or die_error(404, "Reading git-diff-tree failed");
6335
6336         # non-textual hash id's can be cached
6337         my $expires;
6338         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6339                 $expires = "+1d";
6340         }
6341         my $refs = git_get_references();
6342         my $ref = format_ref_marker($refs, $co{'id'});
6343
6344         git_header_html(undef, $expires);
6345         git_print_page_nav('commit', '',
6346                            $hash, $co{'tree'}, $hash,
6347                            $formats_nav);
6348
6349         if (defined $co{'parent'}) {
6350                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6351         } else {
6352                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6353         }
6354         print "<div class=\"title_text\">\n" .
6355               "<table class=\"object_header\">\n";
6356         git_print_authorship_rows(\%co);
6357         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6358         print "<tr>" .
6359               "<td>tree</td>" .
6360               "<td class=\"sha1\">" .
6361               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6362                        class => "list"}, $co{'tree'}) .
6363               "</td>" .
6364               "<td class=\"link\">" .
6365               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6366                       "tree");
6367         my $snapshot_links = format_snapshot_links($hash);
6368         if (defined $snapshot_links) {
6369                 print " | " . $snapshot_links;
6370         }
6371         print "</td>" .
6372               "</tr>\n";
6373
6374         foreach my $par (@$parents) {
6375                 print "<tr>" .
6376                       "<td>parent</td>" .
6377                       "<td class=\"sha1\">" .
6378                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6379                                class => "list"}, $par) .
6380                       "</td>" .
6381                       "<td class=\"link\">" .
6382                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6383                       " | " .
6384                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6385                       "</td>" .
6386                       "</tr>\n";
6387         }
6388         print "</table>".
6389               "</div>\n";
6390
6391         print "<div class=\"page_body\">\n";
6392         git_print_log($co{'comment'});
6393         print "</div>\n";
6394
6395         git_difftree_body(\@difftree, $hash, @$parents);
6396
6397         git_footer_html();
6398 }
6399
6400 sub git_object {
6401         # object is defined by:
6402         # - hash or hash_base alone
6403         # - hash_base and file_name
6404         my $type;
6405
6406         # - hash or hash_base alone
6407         if ($hash || ($hash_base && !defined $file_name)) {
6408                 my $object_id = $hash || $hash_base;
6409
6410                 open my $fd, "-|", quote_command(
6411                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6412                         or die_error(404, "Object does not exist");
6413                 $type = <$fd>;
6414                 chomp $type;
6415                 close $fd
6416                         or die_error(404, "Object does not exist");
6417
6418         # - hash_base and file_name
6419         } elsif ($hash_base && defined $file_name) {
6420                 $file_name =~ s,/+$,,;
6421
6422                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6423                         or die_error(404, "Base object does not exist");
6424
6425                 # here errors should not hapen
6426                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6427                         or die_error(500, "Open git-ls-tree failed");
6428                 my $line = <$fd>;
6429                 close $fd;
6430
6431                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6432                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6433                         die_error(404, "File or directory for given base does not exist");
6434                 }
6435                 $type = $2;
6436                 $hash = $3;
6437         } else {
6438                 die_error(400, "Not enough information to find object");
6439         }
6440
6441         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6442                                           hash=>$hash, hash_base=>$hash_base,
6443                                           file_name=>$file_name),
6444                              -status => '302 Found');
6445 }
6446
6447 sub git_blobdiff {
6448         my $format = shift || 'html';
6449
6450         my $fd;
6451         my @difftree;
6452         my %diffinfo;
6453         my $expires;
6454
6455         # preparing $fd and %diffinfo for git_patchset_body
6456         # new style URI
6457         if (defined $hash_base && defined $hash_parent_base) {
6458                 if (defined $file_name) {
6459                         # read raw output
6460                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6461                                 $hash_parent_base, $hash_base,
6462                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6463                                 or die_error(500, "Open git-diff-tree failed");
6464                         @difftree = map { chomp; $_ } <$fd>;
6465                         close $fd
6466                                 or die_error(404, "Reading git-diff-tree failed");
6467                         @difftree
6468                                 or die_error(404, "Blob diff not found");
6469
6470                 } elsif (defined $hash &&
6471                          $hash =~ /[0-9a-fA-F]{40}/) {
6472                         # try to find filename from $hash
6473
6474                         # read filtered raw output
6475                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6476                                 $hash_parent_base, $hash_base, "--"
6477                                 or die_error(500, "Open git-diff-tree failed");
6478                         @difftree =
6479                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6480                                 # $hash == to_id
6481                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6482                                 map { chomp; $_ } <$fd>;
6483                         close $fd
6484                                 or die_error(404, "Reading git-diff-tree failed");
6485                         @difftree
6486                                 or die_error(404, "Blob diff not found");
6487
6488                 } else {
6489                         die_error(400, "Missing one of the blob diff parameters");
6490                 }
6491
6492                 if (@difftree > 1) {
6493                         die_error(400, "Ambiguous blob diff specification");
6494                 }
6495
6496                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6497                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6498                 $file_name   ||= $diffinfo{'to_file'};
6499
6500                 $hash_parent ||= $diffinfo{'from_id'};
6501                 $hash        ||= $diffinfo{'to_id'};
6502
6503                 # non-textual hash id's can be cached
6504                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6505                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6506                         $expires = '+1d';
6507                 }
6508
6509                 # open patch output
6510                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6511                         '-p', ($format eq 'html' ? "--full-index" : ()),
6512                         $hash_parent_base, $hash_base,
6513                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6514                         or die_error(500, "Open git-diff-tree failed");
6515         }
6516
6517         # old/legacy style URI -- not generated anymore since 1.4.3.
6518         if (!%diffinfo) {
6519                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6520         }
6521
6522         # header
6523         if ($format eq 'html') {
6524                 my $formats_nav =
6525                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6526                                 "raw");
6527                 git_header_html(undef, $expires);
6528                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6529                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6530                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6531                 } else {
6532                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6533                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6534                 }
6535                 if (defined $file_name) {
6536                         git_print_page_path($file_name, "blob", $hash_base);
6537                 } else {
6538                         print "<div class=\"page_path\"></div>\n";
6539                 }
6540
6541         } elsif ($format eq 'plain') {
6542                 print $cgi->header(
6543                         -type => 'text/plain',
6544                         -charset => 'utf-8',
6545                         -expires => $expires,
6546                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6547
6548                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6549
6550         } else {
6551                 die_error(400, "Unknown blobdiff format");
6552         }
6553
6554         # patch
6555         if ($format eq 'html') {
6556                 print "<div class=\"page_body\">\n";
6557
6558                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6559                 close $fd;
6560
6561                 print "</div>\n"; # class="page_body"
6562                 git_footer_html();
6563
6564         } else {
6565                 while (my $line = <$fd>) {
6566                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6567                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6568
6569                         print $line;
6570
6571                         last if $line =~ m!^\+\+\+!;
6572                 }
6573                 local $/ = undef;
6574                 print <$fd>;
6575                 close $fd;
6576         }
6577 }
6578
6579 sub git_blobdiff_plain {
6580         git_blobdiff('plain');
6581 }
6582
6583 sub git_commitdiff {
6584         my %params = @_;
6585         my $format = $params{-format} || 'html';
6586
6587         my ($patch_max) = gitweb_get_feature('patches');
6588         if ($format eq 'patch') {
6589                 die_error(403, "Patch view not allowed") unless $patch_max;
6590         }
6591
6592         $hash ||= $hash_base || "HEAD";
6593         my %co = parse_commit($hash)
6594             or die_error(404, "Unknown commit object");
6595
6596         # choose format for commitdiff for merge
6597         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6598                 $hash_parent = '--cc';
6599         }
6600         # we need to prepare $formats_nav before almost any parameter munging
6601         my $formats_nav;
6602         if ($format eq 'html') {
6603                 $formats_nav =
6604                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6605                                 "raw");
6606                 if ($patch_max && @{$co{'parents'}} <= 1) {
6607                         $formats_nav .= " | " .
6608                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6609                                         "patch");
6610                 }
6611
6612                 if (defined $hash_parent &&
6613                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6614                         # commitdiff with two commits given
6615                         my $hash_parent_short = $hash_parent;
6616                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6617                                 $hash_parent_short = substr($hash_parent, 0, 7);
6618                         }
6619                         $formats_nav .=
6620                                 ' (from';
6621                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6622                                 if ($co{'parents'}[$i] eq $hash_parent) {
6623                                         $formats_nav .= ' parent ' . ($i+1);
6624                                         last;
6625                                 }
6626                         }
6627                         $formats_nav .= ': ' .
6628                                 $cgi->a({-href => href(action=>"commitdiff",
6629                                                        hash=>$hash_parent)},
6630                                         esc_html($hash_parent_short)) .
6631                                 ')';
6632                 } elsif (!$co{'parent'}) {
6633                         # --root commitdiff
6634                         $formats_nav .= ' (initial)';
6635                 } elsif (scalar @{$co{'parents'}} == 1) {
6636                         # single parent commit
6637                         $formats_nav .=
6638                                 ' (parent: ' .
6639                                 $cgi->a({-href => href(action=>"commitdiff",
6640                                                        hash=>$co{'parent'})},
6641                                         esc_html(substr($co{'parent'}, 0, 7))) .
6642                                 ')';
6643                 } else {
6644                         # merge commit
6645                         if ($hash_parent eq '--cc') {
6646                                 $formats_nav .= ' | ' .
6647                                         $cgi->a({-href => href(action=>"commitdiff",
6648                                                                hash=>$hash, hash_parent=>'-c')},
6649                                                 'combined');
6650                         } else { # $hash_parent eq '-c'
6651                                 $formats_nav .= ' | ' .
6652                                         $cgi->a({-href => href(action=>"commitdiff",
6653                                                                hash=>$hash, hash_parent=>'--cc')},
6654                                                 'compact');
6655                         }
6656                         $formats_nav .=
6657                                 ' (merge: ' .
6658                                 join(' ', map {
6659                                         $cgi->a({-href => href(action=>"commitdiff",
6660                                                                hash=>$_)},
6661                                                 esc_html(substr($_, 0, 7)));
6662                                 } @{$co{'parents'}} ) .
6663                                 ')';
6664                 }
6665         }
6666
6667         my $hash_parent_param = $hash_parent;
6668         if (!defined $hash_parent_param) {
6669                 # --cc for multiple parents, --root for parentless
6670                 $hash_parent_param =
6671                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6672         }
6673
6674         # read commitdiff
6675         my $fd;
6676         my @difftree;
6677         if ($format eq 'html') {
6678                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6679                         "--no-commit-id", "--patch-with-raw", "--full-index",
6680                         $hash_parent_param, $hash, "--"
6681                         or die_error(500, "Open git-diff-tree failed");
6682
6683                 while (my $line = <$fd>) {
6684                         chomp $line;
6685                         # empty line ends raw part of diff-tree output
6686                         last unless $line;
6687                         push @difftree, scalar parse_difftree_raw_line($line);
6688                 }
6689
6690         } elsif ($format eq 'plain') {
6691                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6692                         '-p', $hash_parent_param, $hash, "--"
6693                         or die_error(500, "Open git-diff-tree failed");
6694         } elsif ($format eq 'patch') {
6695                 # For commit ranges, we limit the output to the number of
6696                 # patches specified in the 'patches' feature.
6697                 # For single commits, we limit the output to a single patch,
6698                 # diverging from the git-format-patch default.
6699                 my @commit_spec = ();
6700                 if ($hash_parent) {
6701                         if ($patch_max > 0) {
6702                                 push @commit_spec, "-$patch_max";
6703                         }
6704                         push @commit_spec, '-n', "$hash_parent..$hash";
6705                 } else {
6706                         if ($params{-single}) {
6707                                 push @commit_spec, '-1';
6708                         } else {
6709                                 if ($patch_max > 0) {
6710                                         push @commit_spec, "-$patch_max";
6711                                 }
6712                                 push @commit_spec, "-n";
6713                         }
6714                         push @commit_spec, '--root', $hash;
6715                 }
6716                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6717                         '--encoding=utf8', '--stdout', @commit_spec
6718                         or die_error(500, "Open git-format-patch failed");
6719         } else {
6720                 die_error(400, "Unknown commitdiff format");
6721         }
6722
6723         # non-textual hash id's can be cached
6724         my $expires;
6725         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6726                 $expires = "+1d";
6727         }
6728
6729         # write commit message
6730         if ($format eq 'html') {
6731                 my $refs = git_get_references();
6732                 my $ref = format_ref_marker($refs, $co{'id'});
6733
6734                 git_header_html(undef, $expires);
6735                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6736                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6737                 print "<div class=\"title_text\">\n" .
6738                       "<table class=\"object_header\">\n";
6739                 git_print_authorship_rows(\%co);
6740                 print "</table>".
6741                       "</div>\n";
6742                 print "<div class=\"page_body\">\n";
6743                 if (@{$co{'comment'}} > 1) {
6744                         print "<div class=\"log\">\n";
6745                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6746                         print "</div>\n"; # class="log"
6747                 }
6748
6749         } elsif ($format eq 'plain') {
6750                 my $refs = git_get_references("tags");
6751                 my $tagname = git_get_rev_name_tags($hash);
6752                 my $filename = basename($project) . "-$hash.patch";
6753
6754                 print $cgi->header(
6755                         -type => 'text/plain',
6756                         -charset => 'utf-8',
6757                         -expires => $expires,
6758                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6759                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6760                 print "From: " . to_utf8($co{'author'}) . "\n";
6761                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6762                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6763
6764                 print "X-Git-Tag: $tagname\n" if $tagname;
6765                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6766
6767                 foreach my $line (@{$co{'comment'}}) {
6768                         print to_utf8($line) . "\n";
6769                 }
6770                 print "---\n\n";
6771         } elsif ($format eq 'patch') {
6772                 my $filename = basename($project) . "-$hash.patch";
6773
6774                 print $cgi->header(
6775                         -type => 'text/plain',
6776                         -charset => 'utf-8',
6777                         -expires => $expires,
6778                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6779         }
6780
6781         # write patch
6782         if ($format eq 'html') {
6783                 my $use_parents = !defined $hash_parent ||
6784                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6785                 git_difftree_body(\@difftree, $hash,
6786                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6787                 print "<br/>\n";
6788
6789                 git_patchset_body($fd, \@difftree, $hash,
6790                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6791                 close $fd;
6792                 print "</div>\n"; # class="page_body"
6793                 git_footer_html();
6794
6795         } elsif ($format eq 'plain') {
6796                 local $/ = undef;
6797                 print <$fd>;
6798                 close $fd
6799                         or print "Reading git-diff-tree failed\n";
6800         } elsif ($format eq 'patch') {
6801                 local $/ = undef;
6802                 print <$fd>;
6803                 close $fd
6804                         or print "Reading git-format-patch failed\n";
6805         }
6806 }
6807
6808 sub git_commitdiff_plain {
6809         git_commitdiff(-format => 'plain');
6810 }
6811
6812 # format-patch-style patches
6813 sub git_patch {
6814         git_commitdiff(-format => 'patch', -single => 1);
6815 }
6816
6817 sub git_patches {
6818         git_commitdiff(-format => 'patch');
6819 }
6820
6821 sub git_history {
6822         git_log_generic('history', \&git_history_body,
6823                         $hash_base, $hash_parent_base,
6824                         $file_name, $hash);
6825 }
6826
6827 sub git_search {
6828         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6829         if (!defined $searchtext) {
6830                 die_error(400, "Text field is empty");
6831         }
6832         if (!defined $hash) {
6833                 $hash = git_get_head_hash($project);
6834         }
6835         my %co = parse_commit($hash);
6836         if (!%co) {
6837                 die_error(404, "Unknown commit object");
6838         }
6839         if (!defined $page) {
6840                 $page = 0;
6841         }
6842
6843         $searchtype ||= 'commit';
6844         if ($searchtype eq 'pickaxe') {
6845                 # pickaxe may take all resources of your box and run for several minutes
6846                 # with every query - so decide by yourself how public you make this feature
6847                 gitweb_check_feature('pickaxe')
6848                     or die_error(403, "Pickaxe is disabled");
6849         }
6850         if ($searchtype eq 'grep') {
6851                 gitweb_check_feature('grep')
6852                     or die_error(403, "Grep is disabled");
6853         }
6854
6855         git_header_html();
6856
6857         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6858                 my $greptype;
6859                 if ($searchtype eq 'commit') {
6860                         $greptype = "--grep=";
6861                 } elsif ($searchtype eq 'author') {
6862                         $greptype = "--author=";
6863                 } elsif ($searchtype eq 'committer') {
6864                         $greptype = "--committer=";
6865                 }
6866                 $greptype .= $searchtext;
6867                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6868                                                $greptype, '--regexp-ignore-case',
6869                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6870
6871                 my $paging_nav = '';
6872                 if ($page > 0) {
6873                         $paging_nav .=
6874                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6875                                                        searchtext=>$searchtext,
6876                                                        searchtype=>$searchtype)},
6877                                         "first");
6878                         $paging_nav .= " &sdot; " .
6879                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6880                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6881                 } else {
6882                         $paging_nav .= "first";
6883                         $paging_nav .= " &sdot; prev";
6884                 }
6885                 my $next_link = '';
6886                 if ($#commitlist >= 100) {
6887                         $next_link =
6888                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6889                                          -accesskey => "n", -title => "Alt-n"}, "next");
6890                         $paging_nav .= " &sdot; $next_link";
6891                 } else {
6892                         $paging_nav .= " &sdot; next";
6893                 }
6894
6895                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6896                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6897                 if ($page == 0 && !@commitlist) {
6898                         print "<p>No match.</p>\n";
6899                 } else {
6900                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6901                 }
6902         }
6903
6904         if ($searchtype eq 'pickaxe') {
6905                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6906                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6907
6908                 print "<table class=\"pickaxe search\">\n";
6909                 my $alternate = 1;
6910                 local $/ = "\n";
6911                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6912                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6913                         ($search_use_regexp ? '--pickaxe-regex' : ());
6914                 undef %co;
6915                 my @files;
6916                 while (my $line = <$fd>) {
6917                         chomp $line;
6918                         next unless $line;
6919
6920                         my %set = parse_difftree_raw_line($line);
6921                         if (defined $set{'commit'}) {
6922                                 # finish previous commit
6923                                 if (%co) {
6924                                         print "</td>\n" .
6925                                               "<td class=\"link\">" .
6926                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6927                                               " | " .
6928                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6929                                         print "</td>\n" .
6930                                               "</tr>\n";
6931                                 }
6932
6933                                 if ($alternate) {
6934                                         print "<tr class=\"dark\">\n";
6935                                 } else {
6936                                         print "<tr class=\"light\">\n";
6937                                 }
6938                                 $alternate ^= 1;
6939                                 %co = parse_commit($set{'commit'});
6940                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6941                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6942                                       "<td><i>$author</i></td>\n" .
6943                                       "<td>" .
6944                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6945                                               -class => "list subject"},
6946                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6947                         } elsif (defined $set{'to_id'}) {
6948                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6949
6950                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6951                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6952                                               -class => "list"},
6953                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6954                                       "<br/>\n";
6955                         }
6956                 }
6957                 close $fd;
6958
6959                 # finish last commit (warning: repetition!)
6960                 if (%co) {
6961                         print "</td>\n" .
6962                               "<td class=\"link\">" .
6963                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6964                               " | " .
6965                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6966                         print "</td>\n" .
6967                               "</tr>\n";
6968                 }
6969
6970                 print "</table>\n";
6971         }
6972
6973         if ($searchtype eq 'grep') {
6974                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6975                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6976
6977                 print "<table class=\"grep_search\">\n";
6978                 my $alternate = 1;
6979                 my $matches = 0;
6980                 local $/ = "\n";
6981                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6982                         $search_use_regexp ? ('-E', '-i') : '-F',
6983                         $searchtext, $co{'tree'};
6984                 my $lastfile = '';
6985                 while (my $line = <$fd>) {
6986                         chomp $line;
6987                         my ($file, $lno, $ltext, $binary);
6988                         last if ($matches++ > 1000);
6989                         if ($line =~ /^Binary file (.+) matches$/) {
6990                                 $file = $1;
6991                                 $binary = 1;
6992                         } else {
6993                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6994                         }
6995                         if ($file ne $lastfile) {
6996                                 $lastfile and print "</td></tr>\n";
6997                                 if ($alternate++) {
6998                                         print "<tr class=\"dark\">\n";
6999                                 } else {
7000                                         print "<tr class=\"light\">\n";
7001                                 }
7002                                 print "<td class=\"list\">".
7003                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7004                                                                file_name=>"$file"),
7005                                                 -class => "list"}, esc_path($file));
7006                                 print "</td><td>\n";
7007                                 $lastfile = $file;
7008                         }
7009                         if ($binary) {
7010                                 print "<div class=\"binary\">Binary file</div>\n";
7011                         } else {
7012                                 $ltext = untabify($ltext);
7013                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7014                                         $ltext = esc_html($1, -nbsp=>1);
7015                                         $ltext .= '<span class="match">';
7016                                         $ltext .= esc_html($2, -nbsp=>1);
7017                                         $ltext .= '</span>';
7018                                         $ltext .= esc_html($3, -nbsp=>1);
7019                                 } else {
7020                                         $ltext = esc_html($ltext, -nbsp=>1);
7021                                 }
7022                                 print "<div class=\"pre\">" .
7023                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7024                                                                file_name=>"$file").'#l'.$lno,
7025                                                 -class => "linenr"}, sprintf('%4i', $lno))
7026                                         . ' ' .  $ltext . "</div>\n";
7027                         }
7028                 }
7029                 if ($lastfile) {
7030                         print "</td></tr>\n";
7031                         if ($matches > 1000) {
7032                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7033                         }
7034                 } else {
7035                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7036                 }
7037                 close $fd;
7038
7039                 print "</table>\n";
7040         }
7041         git_footer_html();
7042 }
7043
7044 sub git_search_help {
7045         git_header_html();
7046         git_print_page_nav('','', $hash,$hash,$hash);
7047         print <<EOT;
7048 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7049 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7050 the pattern entered is recognized as the POSIX extended
7051 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7052 insensitive).</p>
7053 <dl>
7054 <dt><b>commit</b></dt>
7055 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7056 EOT
7057         my $have_grep = gitweb_check_feature('grep');
7058         if ($have_grep) {
7059                 print <<EOT;
7060 <dt><b>grep</b></dt>
7061 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7062     a different one) are searched for the given pattern. On large trees, this search can take
7063 a while and put some strain on the server, so please use it with some consideration. Note that
7064 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7065 case-sensitive.</dd>
7066 EOT
7067         }
7068         print <<EOT;
7069 <dt><b>author</b></dt>
7070 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7071 <dt><b>committer</b></dt>
7072 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7073 EOT
7074         my $have_pickaxe = gitweb_check_feature('pickaxe');
7075         if ($have_pickaxe) {
7076                 print <<EOT;
7077 <dt><b>pickaxe</b></dt>
7078 <dd>All commits that caused the string to appear or disappear from any file (changes that
7079 added, removed or "modified" the string) will be listed. This search can take a while and
7080 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7081 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7082 EOT
7083         }
7084         print "</dl>\n";
7085         git_footer_html();
7086 }
7087
7088 sub git_shortlog {
7089         git_log_generic('shortlog', \&git_shortlog_body,
7090                         $hash, $hash_parent);
7091 }
7092
7093 ## ......................................................................
7094 ## feeds (RSS, Atom; OPML)
7095
7096 sub git_feed {
7097         my $format = shift || 'atom';
7098         my $have_blame = gitweb_check_feature('blame');
7099
7100         # Atom: http://www.atomenabled.org/developers/syndication/
7101         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7102         if ($format ne 'rss' && $format ne 'atom') {
7103                 die_error(400, "Unknown web feed format");
7104         }
7105
7106         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7107         my $head = $hash || 'HEAD';
7108         my @commitlist = parse_commits($head, 150, 0, $file_name);
7109
7110         my %latest_commit;
7111         my %latest_date;
7112         my $content_type = "application/$format+xml";
7113         if (defined $cgi->http('HTTP_ACCEPT') &&
7114                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7115                 # browser (feed reader) prefers text/xml
7116                 $content_type = 'text/xml';
7117         }
7118         if (defined($commitlist[0])) {
7119                 %latest_commit = %{$commitlist[0]};
7120                 my $latest_epoch = $latest_commit{'committer_epoch'};
7121                 %latest_date   = parse_date($latest_epoch);
7122                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7123                 if (defined $if_modified) {
7124                         my $since;
7125                         if (eval { require HTTP::Date; 1; }) {
7126                                 $since = HTTP::Date::str2time($if_modified);
7127                         } elsif (eval { require Time::ParseDate; 1; }) {
7128                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7129                         }
7130                         if (defined $since && $latest_epoch <= $since) {
7131                                 print $cgi->header(
7132                                         -type => $content_type,
7133                                         -charset => 'utf-8',
7134                                         -last_modified => $latest_date{'rfc2822'},
7135                                         -status => '304 Not Modified');
7136                                 return;
7137                         }
7138                 }
7139                 print $cgi->header(
7140                         -type => $content_type,
7141                         -charset => 'utf-8',
7142                         -last_modified => $latest_date{'rfc2822'});
7143         } else {
7144                 print $cgi->header(
7145                         -type => $content_type,
7146                         -charset => 'utf-8');
7147         }
7148
7149         # Optimization: skip generating the body if client asks only
7150         # for Last-Modified date.
7151         return if ($cgi->request_method() eq 'HEAD');
7152
7153         # header variables
7154         my $title = "$site_name - $project/$action";
7155         my $feed_type = 'log';
7156         if (defined $hash) {
7157                 $title .= " - '$hash'";
7158                 $feed_type = 'branch log';
7159                 if (defined $file_name) {
7160                         $title .= " :: $file_name";
7161                         $feed_type = 'history';
7162                 }
7163         } elsif (defined $file_name) {
7164                 $title .= " - $file_name";
7165                 $feed_type = 'history';
7166         }
7167         $title .= " $feed_type";
7168         my $descr = git_get_project_description($project);
7169         if (defined $descr) {
7170                 $descr = esc_html($descr);
7171         } else {
7172                 $descr = "$project " .
7173                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7174                          " feed";
7175         }
7176         my $owner = git_get_project_owner($project);
7177         $owner = esc_html($owner);
7178
7179         #header
7180         my $alt_url;
7181         if (defined $file_name) {
7182                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7183         } elsif (defined $hash) {
7184                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7185         } else {
7186                 $alt_url = href(-full=>1, action=>"summary");
7187         }
7188         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7189         if ($format eq 'rss') {
7190                 print <<XML;
7191 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7192 <channel>
7193 XML
7194                 print "<title>$title</title>\n" .
7195                       "<link>$alt_url</link>\n" .
7196                       "<description>$descr</description>\n" .
7197                       "<language>en</language>\n" .
7198                       # project owner is responsible for 'editorial' content
7199                       "<managingEditor>$owner</managingEditor>\n";
7200                 if (defined $logo || defined $favicon) {
7201                         # prefer the logo to the favicon, since RSS
7202                         # doesn't allow both
7203                         my $img = esc_url($logo || $favicon);
7204                         print "<image>\n" .
7205                               "<url>$img</url>\n" .
7206                               "<title>$title</title>\n" .
7207                               "<link>$alt_url</link>\n" .
7208                               "</image>\n";
7209                 }
7210                 if (%latest_date) {
7211                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7212                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7213                 }
7214                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7215         } elsif ($format eq 'atom') {
7216                 print <<XML;
7217 <feed xmlns="http://www.w3.org/2005/Atom">
7218 XML
7219                 print "<title>$title</title>\n" .
7220                       "<subtitle>$descr</subtitle>\n" .
7221                       '<link rel="alternate" type="text/html" href="' .
7222                       $alt_url . '" />' . "\n" .
7223                       '<link rel="self" type="' . $content_type . '" href="' .
7224                       $cgi->self_url() . '" />' . "\n" .
7225                       "<id>" . href(-full=>1) . "</id>\n" .
7226                       # use project owner for feed author
7227                       "<author><name>$owner</name></author>\n";
7228                 if (defined $favicon) {
7229                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7230                 }
7231                 if (defined $logo_url) {
7232                         # not twice as wide as tall: 72 x 27 pixels
7233                         print "<logo>" . esc_url($logo) . "</logo>\n";
7234                 }
7235                 if (! %latest_date) {
7236                         # dummy date to keep the feed valid until commits trickle in:
7237                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7238                 } else {
7239                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7240                 }
7241                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7242         }
7243
7244         # contents
7245         for (my $i = 0; $i <= $#commitlist; $i++) {
7246                 my %co = %{$commitlist[$i]};
7247                 my $commit = $co{'id'};
7248                 # we read 150, we always show 30 and the ones more recent than 48 hours
7249                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7250                         last;
7251                 }
7252                 my %cd = parse_date($co{'author_epoch'});
7253
7254                 # get list of changed files
7255                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7256                         $co{'parent'} || "--root",
7257                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7258                         or next;
7259                 my @difftree = map { chomp; $_ } <$fd>;
7260                 close $fd
7261                         or next;
7262
7263                 # print element (entry, item)
7264                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7265                 if ($format eq 'rss') {
7266                         print "<item>\n" .
7267                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7268                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7269                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7270                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7271                               "<link>$co_url</link>\n" .
7272                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7273                               "<content:encoded>" .
7274                               "<![CDATA[\n";
7275                 } elsif ($format eq 'atom') {
7276                         print "<entry>\n" .
7277                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7278                               "<updated>$cd{'iso-8601'}</updated>\n" .
7279                               "<author>\n" .
7280                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7281                         if ($co{'author_email'}) {
7282                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7283                         }
7284                         print "</author>\n" .
7285                               # use committer for contributor
7286                               "<contributor>\n" .
7287                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7288                         if ($co{'committer_email'}) {
7289                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7290                         }
7291                         print "</contributor>\n" .
7292                               "<published>$cd{'iso-8601'}</published>\n" .
7293                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7294                               "<id>$co_url</id>\n" .
7295                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7296                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7297                 }
7298                 my $comment = $co{'comment'};
7299                 print "<pre>\n";
7300                 foreach my $line (@$comment) {
7301                         $line = esc_html($line);
7302                         print "$line\n";
7303                 }
7304                 print "</pre><ul>\n";
7305                 foreach my $difftree_line (@difftree) {
7306                         my %difftree = parse_difftree_raw_line($difftree_line);
7307                         next if !$difftree{'from_id'};
7308
7309                         my $file = $difftree{'file'} || $difftree{'to_file'};
7310
7311                         print "<li>" .
7312                               "[" .
7313                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7314                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7315                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7316                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7317                                       -title => "diff"}, 'D');
7318                         if ($have_blame) {
7319                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7320                                                              file_name=>$file, hash_base=>$commit),
7321                                               -title => "blame"}, 'B');
7322                         }
7323                         # if this is not a feed of a file history
7324                         if (!defined $file_name || $file_name ne $file) {
7325                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7326                                                              file_name=>$file, hash=>$commit),
7327                                               -title => "history"}, 'H');
7328                         }
7329                         $file = esc_path($file);
7330                         print "] ".
7331                               "$file</li>\n";
7332                 }
7333                 if ($format eq 'rss') {
7334                         print "</ul>]]>\n" .
7335                               "</content:encoded>\n" .
7336                               "</item>\n";
7337                 } elsif ($format eq 'atom') {
7338                         print "</ul>\n</div>\n" .
7339                               "</content>\n" .
7340                               "</entry>\n";
7341                 }
7342         }
7343
7344         # end of feed
7345         if ($format eq 'rss') {
7346                 print "</channel>\n</rss>\n";
7347         } elsif ($format eq 'atom') {
7348                 print "</feed>\n";
7349         }
7350 }
7351
7352 sub git_rss {
7353         git_feed('rss');
7354 }
7355
7356 sub git_atom {
7357         git_feed('atom');
7358 }
7359
7360 sub git_opml {
7361         my @list = git_get_projects_list();
7362
7363         print $cgi->header(
7364                 -type => 'text/xml',
7365                 -charset => 'utf-8',
7366                 -content_disposition => 'inline; filename="opml.xml"');
7367
7368         print <<XML;
7369 <?xml version="1.0" encoding="utf-8"?>
7370 <opml version="1.0">
7371 <head>
7372   <title>$site_name OPML Export</title>
7373 </head>
7374 <body>
7375 <outline text="git RSS feeds">
7376 XML
7377
7378         foreach my $pr (@list) {
7379                 my %proj = %$pr;
7380                 my $head = git_get_head_hash($proj{'path'});
7381                 if (!defined $head) {
7382                         next;
7383                 }
7384                 $git_dir = "$projectroot/$proj{'path'}";
7385                 my %co = parse_commit($head);
7386                 if (!%co) {
7387                         next;
7388                 }
7389
7390                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7391                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7392                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7393                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7394         }
7395         print <<XML;
7396 </outline>
7397 </body>
7398 </opml>
7399 XML
7400 }