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 $cache;
 287
 288 # Legacy options configuring behavior of git.kernel.org caching
 289 our ($minCacheTime, $maxCacheTime, $cachedir, $backgroundCache, $maxCacheLife);
 290 # You define site-wide cache options defaults here; override them with
 291 # $GITWEB_CONFIG as necessary.
 292 our %cache_options = (
 293         # The location in the filesystem that will hold the root of the cache.
 294         # This directory will be created as needed (if possible) on the first
 295         # cache set.  Note that either this directory must exists and web server
 296         # has to have write permissions to it, or web server must be able to
 297         # create this directory.
 298         # Possible values:
 299         # * 'cache' (relative to gitweb),
 300         # * File::Spec->catdir(File::Spec->tmpdir(), 'gitweb-cache'),
 301         # * '/var/cache/gitweb' (FHS compliant, requires being set up),
 302         'cache_root' => 'cache',
 303
 304         # The number of subdirectories deep to cache object item.  This should be
 305         # large enough that no cache directory has more than a few hundred
 306         # objects.  Each non-leaf directory contains up to 256 subdirectories
 307         # (00-ff).  Must be larger than 0.
 308         'cache_depth' => 1,
 309
 310         # The (global) minimum expiration time for objects placed in the cache,
 311         # in seconds.  If the dynamic adaptive cache exporation time is lower
 312         # than this number, we set cache timeout to this minimum.
 313         'expires_min' => 20,   # 20 seconds
 314
 315         # The (global) maximum expiration time for dynamic (adaptive) caching
 316         # algorithm, in seconds.  If the adaptive cache lifetime exceeds this
 317         # number, we set cache timeout to this maximum.
 318         # (If 'expires_min' >= 'expires_max', there is no adaptive cache timeout,
 319         # and 'expires_min' is used as expiration time for objects in cache.)
 320         'expires_max' => 1200, # 20 minutes
 321
 322         # Cache lifetime will be increased by applying this factor to the result
 323         # from 'check_load' callback (see below).
 324         'expires_factor' => 60, # expire time in seconds for 1.0 (100% CPU) load
 325
 326         # User supplied callback for deciding the cache policy, usually system
 327         # load.  Multiplied by 'expires_factor' gives adaptive expiration time,
 328         # in seconds, subject to the limits imposed by 'expires_min' and
 329         # 'expires_max' bounds.  Set to undef (or delete) to turn off dynamic
 330         # lifetime control.
 331         # (Compatibile with Cache::Adaptive.)
 332         'check_load' => \&get_loadavg,
 333
 334         # Maximum cache file life, in seconds.  If cache entry lifetime exceeds
 335         # this value, it wouldn't be served as being too stale when waiting for
 336         # cache to be regenerated/refreshed, instead of trying to display
 337         # existing cache date.
 338         # Set it to -1 to always serve existing data if it exists,
 339         # set it to 0 to turn off serving stale data - always wait.
 340         'max_lifetime' => 5*60*60, # 5 hours
 341
 342         # This enables/disables background caching.  If it is set to true value,
 343         # caching engine would return stale data (if it is not older than
 344         # 'max_lifetime' seconds) if it exists, and launch process if regenerating
 345         # (refreshing) cache into the background.  If it is set to false value,
 346         # the process that fills cache must always wait for data to be generated.
 347         # In theory this will make gitweb seem more responsive at the price of
 348         # serving possibly stale data.
 349         'background_cache' => 1,
 350
 351         # Subroutine which would be called when gitweb has to wait for data to
 352         # be generated (it can't serve stale data because there isn't any,
 353         # or if it exists it is older than 'max_lifetime').  The default
 354         # is to use git_generating_data_html(), which creates "Generating..."
 355         # page, which would then redirect or redraw/rewrite the page when
 356         # data is ready.
 357         # Set it to `undef' to disable this feature.
 358         #
 359         # Such subroutine (if invoked from GitwebCache::SimpleFileCache)
 360         # is passed the following parameters: $cache instance, human-readable
 361         # $key to current page, and filehandle $lock_fh to lockfile.
 362         'generating_info' => \&git_generating_data_html,
 363
 364         # This enables/disables using 'generating_info' subroutine by process
 365         # generating data, when not too stale data is not available (data is then
 366         # generated in background).  Because git_generating_data_html() includes
 367         # initial delay (of 1 second by default), and we can assume that die_error
 368         # finishes within this time, then generating error pages should be safe
 369         # from infinite "Generating page..." loop.
 370         'generating_info_is_safe' => 1,
 371
 372         # How to handle runtime errors occurring during cache gets and cache
 373         # sets.  Options are:
 374         #  * "die" (the default) - call die() with an appropriate message
 375         #  * "warn" - call warn() with an appropriate message
 376         #  * "ignore" - do nothing
 377         #  * <coderef> - call this code reference with an appropriate message
 378         # Note that gitweb catches 'die <message>' via custom handle_errors_html
 379         # handler, set via set_message() from CGI::Carp.  'warn <message>' are
 380         # written to web server logs.
 381         #
 382         # The default is to use cache_error_handler, which wraps die_error.
 383         # Only first argument passed to cache_error_handler is used (c.f. CHI)
 384         'on_error' => \&cache_error_handler,
 385 );
 386 # You define site-wide options for "Generating..." page (if enabled) here
 387 # (which means that $cache_options{'generating_info'} is set to coderef);
 388 # override them with $GITWEB_CONFIG as necessary.
 389 our %generating_options = (
 390         # The delay before displaying "Generating..." page, in seconds.  It is
 391         # intended for "Generating..." page to be shown only when really needed.
 392         'startup_delay' => 1,
 393         # The time between generating new piece of output to prevent from
 394         # redirection before data is ready, i.e. time between printing each
 395         # dot in activity indicator / progress info, in seconds.
 396         'print_interval' => 2,
 397         # Maximum time "Generating..." page would be present, waiting for data,
 398         # before unconditional redirect, in seconds.
 399         'timeout' => $cache_options{'expires_min'},
 400 );
 401 # Set to _initialized_ instance of GitwebCache::Capture compatibile capturing
 402 # engine, i.e. one implementing ->new() constructor, and ->capture($code)
 403 # method.  If unset (default), the GitwebCache::Capture::Simple would be used.
 404 our $capture;
 405
 406 # You define site-wide feature defaults here; override them with
 407 # $GITWEB_CONFIG as necessary.
 408 our %feature = (
 409         # feature => {
 410         #       'sub' => feature-sub (subroutine),
 411         #       'override' => allow-override (boolean),
 412         #       'default' => [ default options...] (array reference)}
 413         #
 414         # if feature is overridable (it means that allow-override has true value),
 415         # then feature-sub will be called with default options as parameters;
 416         # return value of feature-sub indicates if to enable specified feature
 417         #
 418         # if there is no 'sub' key (no feature-sub), then feature cannot be
 419         # overridden
 420         #
 421         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 422         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 423         # is enabled
 424
 425         # Enable the 'blame' blob view, showing the last commit that modified
 426         # each line in the file. This can be very CPU-intensive.
 427
 428         # To enable system wide have in $GITWEB_CONFIG
 429         # $feature{'blame'}{'default'} = [1];
 430         # To have project specific config enable override in $GITWEB_CONFIG
 431         # $feature{'blame'}{'override'} = 1;
 432         # and in project config gitweb.blame = 0|1;
 433         'blame' => {
 434                 'sub' => sub { feature_bool('blame', @_) },
 435                 'override' => 0,
 436                 'default' => [0]},
 437
 438         # Enable the 'snapshot' link, providing a compressed archive of any
 439         # tree. This can potentially generate high traffic if you have large
 440         # project.
 441
 442         # Value is a list of formats defined in %known_snapshot_formats that
 443         # you wish to offer.
 444         # To disable system wide have in $GITWEB_CONFIG
 445         # $feature{'snapshot'}{'default'} = [];
 446         # To have project specific config enable override in $GITWEB_CONFIG
 447         # $feature{'snapshot'}{'override'} = 1;
 448         # and in project config, a comma-separated list of formats or "none"
 449         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 450         'snapshot' => {
 451                 'sub' => \&feature_snapshot,
 452                 'override' => 0,
 453                 'default' => ['tgz']},
 454
 455         # Enable text search, which will list the commits which match author,
 456         # committer or commit text to a given string.  Enabled by default.
 457         # Project specific override is not supported.
 458         'search' => {
 459                 'override' => 0,
 460                 'default' => [1]},
 461
 462         # Enable grep search, which will list the files in currently selected
 463         # tree containing the given string. Enabled by default. This can be
 464         # potentially CPU-intensive, of course.
 465
 466         # To enable system wide have in $GITWEB_CONFIG
 467         # $feature{'grep'}{'default'} = [1];
 468         # To have project specific config enable override in $GITWEB_CONFIG
 469         # $feature{'grep'}{'override'} = 1;
 470         # and in project config gitweb.grep = 0|1;
 471         'grep' => {
 472                 'sub' => sub { feature_bool('grep', @_) },
 473                 'override' => 0,
 474                 'default' => [1]},
 475
 476         # Enable the pickaxe search, which will list the commits that modified
 477         # a given string in a file. This can be practical and quite faster
 478         # alternative to 'blame', but still potentially CPU-intensive.
 479
 480         # To enable system wide have in $GITWEB_CONFIG
 481         # $feature{'pickaxe'}{'default'} = [1];
 482         # To have project specific config enable override in $GITWEB_CONFIG
 483         # $feature{'pickaxe'}{'override'} = 1;
 484         # and in project config gitweb.pickaxe = 0|1;
 485         'pickaxe' => {
 486                 'sub' => sub { feature_bool('pickaxe', @_) },
 487                 'override' => 0,
 488                 'default' => [1]},
 489
 490         # Enable showing size of blobs in a 'tree' view, in a separate
 491         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 492
 493         # To disable system wide have in $GITWEB_CONFIG
 494         # $feature{'show-sizes'}{'default'} = [0];
 495         # To have project specific config enable override in $GITWEB_CONFIG
 496         # $feature{'show-sizes'}{'override'} = 1;
 497         # and in project config gitweb.showsizes = 0|1;
 498         'show-sizes' => {
 499                 'sub' => sub { feature_bool('showsizes', @_) },
 500                 'override' => 0,
 501                 'default' => [1]},
 502
 503         # Make gitweb use an alternative format of the URLs which can be
 504         # more readable and natural-looking: project name is embedded
 505         # directly in the path and the query string contains other
 506         # auxiliary information. All gitweb installations recognize
 507         # URL in either format; this configures in which formats gitweb
 508         # generates links.
 509
 510         # To enable system wide have in $GITWEB_CONFIG
 511         # $feature{'pathinfo'}{'default'} = [1];
 512         # Project specific override is not supported.
 513
 514         # Note that you will need to change the default location of CSS,
 515         # favicon, logo and possibly other files to an absolute URL. Also,
 516         # if gitweb.cgi serves as your indexfile, you will need to force
 517         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 518         'pathinfo' => {
 519                 'override' => 0,
 520                 'default' => [0]},
 521
 522         # Make gitweb consider projects in project root subdirectories
 523         # to be forks of existing projects. Given project $projname.git,
 524         # projects matching $projname/*.git will not be shown in the main
 525         # projects list, instead a '+' mark will be added to $projname
 526         # there and a 'forks' view will be enabled for the project, listing
 527         # all the forks. If project list is taken from a file, forks have
 528         # to be listed after the main project.
 529
 530         # To enable system wide have in $GITWEB_CONFIG
 531         # $feature{'forks'}{'default'} = [1];
 532         # Project specific override is not supported.
 533         'forks' => {
 534                 'override' => 0,
 535                 'default' => [0]},
 536
 537         # Insert custom links to the action bar of all project pages.
 538         # This enables you mainly to link to third-party scripts integrating
 539         # into gitweb; e.g. git-browser for graphical history representation
 540         # or custom web-based repository administration interface.
 541
 542         # The 'default' value consists of a list of triplets in the form
 543         # (label, link, position) where position is the label after which
 544         # to insert the link and link is a format string where %n expands
 545         # to the project name, %f to the project path within the filesystem,
 546         # %h to the current hash (h gitweb parameter) and %b to the current
 547         # hash base (hb gitweb parameter); %% expands to %.
 548
 549         # To enable system wide have in $GITWEB_CONFIG e.g.
 550         # $feature{'actions'}{'default'} = [('graphiclog',
 551         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 552         # Project specific override is not supported.
 553         'actions' => {
 554                 'override' => 0,
 555                 'default' => []},
 556
 557         # Allow gitweb scan project content tags described in ctags/
 558         # of project repository, and display the popular Web 2.0-ish
 559         # "tag cloud" near the project list. Note that this is something
 560         # COMPLETELY different from the normal Git tags.
 561
 562         # gitweb by itself can show existing tags, but it does not handle
 563         # tagging itself; you need an external application for that.
 564         # For an example script, check Girocco's cgi/tagproj.cgi.
 565         # You may want to install the HTML::TagCloud Perl module to get
 566         # a pretty tag cloud instead of just a list of tags.
 567
 568         # To enable system wide have in $GITWEB_CONFIG
 569         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 570         # Project specific override is not supported.
 571         'ctags' => {
 572                 'override' => 0,
 573                 'default' => [0]},
 574
 575         # The maximum number of patches in a patchset generated in patch
 576         # view. Set this to 0 or undef to disable patch view, or to a
 577         # negative number to remove any limit.
 578
 579         # To disable system wide have in $GITWEB_CONFIG
 580         # $feature{'patches'}{'default'} = [0];
 581         # To have project specific config enable override in $GITWEB_CONFIG
 582         # $feature{'patches'}{'override'} = 1;
 583         # and in project config gitweb.patches = 0|n;
 584         # where n is the maximum number of patches allowed in a patchset.
 585         'patches' => {
 586                 'sub' => \&feature_patches,
 587                 'override' => 0,
 588                 'default' => [16]},
 589
 590         # Avatar support. When this feature is enabled, views such as
 591         # shortlog or commit will display an avatar associated with
 592         # the email of the committer(s) and/or author(s).
 593
 594         # Currently available providers are gravatar and picon.
 595         # If an unknown provider is specified, the feature is disabled.
 596
 597         # Gravatar depends on Digest::MD5.
 598         # Picon currently relies on the indiana.edu database.
 599
 600         # To enable system wide have in $GITWEB_CONFIG
 601         # $feature{'avatar'}{'default'} = ['<provider>'];
 602         # where <provider> is either gravatar or picon.
 603         # To have project specific config enable override in $GITWEB_CONFIG
 604         # $feature{'avatar'}{'override'} = 1;
 605         # and in project config gitweb.avatar = <provider>;
 606         'avatar' => {
 607                 'sub' => \&feature_avatar,
 608                 'override' => 0,
 609                 'default' => ['']},
 610
 611         # Enable displaying how much time and how many git commands
 612         # it took to generate and display page.  Disabled by default.
 613         # Project specific override is not supported.
 614         'timed' => {
 615                 'override' => 0,
 616                 'default' => [0]},
 617
 618         # Enable turning some links into links to actions which require
 619         # JavaScript to run (like 'blame_incremental').  Not enabled by
 620         # default.  Project specific override is currently not supported.
 621         'javascript-actions' => {
 622                 'override' => 0,
 623                 'default' => [0]},
 624
 625         # Syntax highlighting support. This is based on Daniel Svensson's
 626         # and Sham Chukoury's work in gitweb-xmms2.git.
 627         # It requires the 'highlight' program present in $PATH,
 628         # and therefore is disabled by default.
 629
 630         # To enable system wide have in $GITWEB_CONFIG
 631         # $feature{'highlight'}{'default'} = [1];
 632
 633         'highlight' => {
 634                 'sub' => sub { feature_bool('highlight', @_) },
 635                 'override' => 0,
 636                 'default' => [0]},
 637 );
 638
 639 sub gitweb_get_feature {
 640         my ($name) = @_;
 641         return unless exists $feature{$name};
 642         my ($sub, $override, @defaults) = (
 643                 $feature{$name}{'sub'},
 644                 $feature{$name}{'override'},
 645                 @{$feature{$name}{'default'}});
 646         # project specific override is possible only if we have project
 647         our $git_dir; # global variable, declared later
 648         if (!$override || !defined $git_dir) {
 649                 return @defaults;
 650         }
 651         if (!defined $sub) {
 652                 warn "feature $name is not overridable";
 653                 return @defaults;
 654         }
 655         return $sub->(@defaults);
 656 }
 657
 658 # A wrapper to check if a given feature is enabled.
 659 # With this, you can say
 660 #
 661 #   my $bool_feat = gitweb_check_feature('bool_feat');
 662 #   gitweb_check_feature('bool_feat') or somecode;
 663 #
 664 # instead of
 665 #
 666 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 667 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 668 #
 669 sub gitweb_check_feature {
 670         return (gitweb_get_feature(@_))[0];
 671 }
 672
 673
 674 sub feature_bool {
 675         my $key = shift;
 676         my ($val) = git_get_project_config($key, '--bool');
 677
 678         if (!defined $val) {
 679                 return ($_[0]);
 680         } elsif ($val eq 'true') {
 681                 return (1);
 682         } elsif ($val eq 'false') {
 683                 return (0);
 684         }
 685 }
 686
 687 sub feature_snapshot {
 688         my (@fmts) = @_;
 689
 690         my ($val) = git_get_project_config('snapshot');
 691
 692         if ($val) {
 693                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 694         }
 695
 696         return @fmts;
 697 }
 698
 699 sub feature_patches {
 700         my @val = (git_get_project_config('patches', '--int'));
 701
 702         if (@val) {
 703                 return @val;
 704         }
 705
 706         return ($_[0]);
 707 }
 708
 709 sub feature_avatar {
 710         my @val = (git_get_project_config('avatar'));
 711
 712         return @val ? @val : @_;
 713 }
 714
 715 # checking HEAD file with -e is fragile if the repository was
 716 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 717 # and then pruned.
 718 sub check_head_link {
 719         my ($dir) = @_;
 720         my $headfile = "$dir/HEAD";
 721         return ((-e $headfile) ||
 722                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 723 }
 724
 725 sub check_export_ok {
 726         my ($dir) = @_;
 727         return (check_head_link($dir) &&
 728                 (!$export_ok || -e "$dir/$export_ok") &&
 729                 (!$export_auth_hook || $export_auth_hook->($dir)));
 730 }
 731
 732 # process alternate names for backward compatibility
 733 # filter out unsupported (unknown) snapshot formats
 734 sub filter_snapshot_fmts {
 735         my @fmts = @_;
 736
 737         @fmts = map {
 738                 exists $known_snapshot_format_aliases{$_} ?
 739                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 740         @fmts = grep {
 741                 exists $known_snapshot_formats{$_} &&
 742                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 743 }
 744
 745 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 746 sub evaluate_gitweb_config {
 747         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 748         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 749         # die if there are errors parsing config file
 750         if (-e $GITWEB_CONFIG) {
 751                 do $GITWEB_CONFIG;
 752                 die $@ if $@;
 753         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 754                 do $GITWEB_CONFIG_SYSTEM;
 755                 die $@ if $@;
 756         }
 757 }
 758
 759 # Get loadavg of system, to compare against $maxload.
 760 # Currently it requires '/proc/loadavg' present to get loadavg;
 761 # if it is not present it returns 0, which means no load checking.
 762 sub get_loadavg {
 763         if( -e '/proc/loadavg' ){
 764                 open my $fd, '<', '/proc/loadavg'
 765                         or return 0;
 766                 my @load = split(/\s+/, scalar <$fd>);
 767                 close $fd;
 768
 769                 # The first three columns measure CPU and IO utilization of the last one,
 770                 # five, and 10 minute periods.  The fourth column shows the number of
 771                 # currently running processes and the total number of processes in the m/n
 772                 # format.  The last column displays the last process ID used.
 773                 return $load[0] || 0;
 774         }
 775         # additional checks for load average should go here for things that don't export
 776         # /proc/loadavg
 777
 778         return 0;
 779 }
 780
 781 # version of the core git binary
 782 our $git_version;
 783 sub evaluate_git_version {
 784         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 785         $number_of_git_cmds++;
 786 }
 787
 788 sub check_loadavg {
 789         if (defined $maxload && get_loadavg() > $maxload) {
 790                 die_error(503, "The load average on the server is too high");
 791         }
 792 }
 793
 794 # ======================================================================
 795 # input validation and dispatch
 796
 797 # input parameters can be collected from a variety of sources (presently, CGI
 798 # and PATH_INFO), so we define an %input_params hash that collects them all
 799 # together during validation: this allows subsequent uses (e.g. href()) to be
 800 # agnostic of the parameter origin
 801
 802 our %input_params = ();
 803
 804 # input parameters are stored with the long parameter name as key. This will
 805 # also be used in the href subroutine to convert parameters to their CGI
 806 # equivalent, and since the href() usage is the most frequent one, we store
 807 # the name -> CGI key mapping here, instead of the reverse.
 808 #
 809 # XXX: Warning: If you touch this, check the search form for updating,
 810 # too.
 811
 812 our @cgi_param_mapping = (
 813         project => "p",
 814         action => "a",
 815         file_name => "f",
 816         file_parent => "fp",
 817         hash => "h",
 818         hash_parent => "hp",
 819         hash_base => "hb",
 820         hash_parent_base => "hpb",
 821         page => "pg",
 822         order => "o",
 823         searchtext => "s",
 824         searchtype => "st",
 825         snapshot_format => "sf",
 826         extra_options => "opt",
 827         search_use_regexp => "sr",
 828         # this must be last entry (for manipulation from JavaScript)
 829         javascript => "js"
 830 );
 831 our %cgi_param_mapping = @cgi_param_mapping;
 832
 833 # we will also need to know the possible actions, for validation
 834 our %actions = (
 835         "blame" => \&git_blame,
 836         "blame_incremental" => \&git_blame_incremental,
 837         "blame_data" => \&git_blame_data,
 838         "blobdiff" => \&git_blobdiff,
 839         "blobdiff_plain" => \&git_blobdiff_plain,
 840         "blob" => \&git_blob,
 841         "blob_plain" => \&git_blob_plain,
 842         "commitdiff" => \&git_commitdiff,
 843         "commitdiff_plain" => \&git_commitdiff_plain,
 844         "commit" => \&git_commit,
 845         "forks" => \&git_forks,
 846         "heads" => \&git_heads,
 847         "history" => \&git_history,
 848         "log" => \&git_log,
 849         "patch" => \&git_patch,
 850         "patches" => \&git_patches,
 851         "rss" => \&git_rss,
 852         "atom" => \&git_atom,
 853         "search" => \&git_search,
 854         "search_help" => \&git_search_help,
 855         "shortlog" => \&git_shortlog,
 856         "summary" => \&git_summary,
 857         "tag" => \&git_tag,
 858         "tags" => \&git_tags,
 859         "tree" => \&git_tree,
 860         "snapshot" => \&git_snapshot,
 861         "object" => \&git_object,
 862         # those below don't need $project
 863         "opml" => \&git_opml,
 864         "project_list" => \&git_project_list,
 865         "project_index" => \&git_project_index,
 866 );
 867
 868 # finally, we have the hash of allowed extra_options for the commands that
 869 # allow them
 870 our %allowed_options = (
 871         "--no-merges" => [ qw(rss atom log shortlog history) ],
 872 );
 873
 874 our %actions_info = ();
 875 sub evaluate_actions_info {
 876         our %actions_info;
 877         our (%actions);
 878
 879         # unless explicitely stated otherwise, default output format is html
 880         foreach my $action (keys %actions) {
 881                 $actions_info{$action}{'output_format'} = 'html';
 882         }
 883         # list all exceptions; undef means variable (no definite format)
 884         map { $actions_info{$_}{'output_format'} = 'text' }
 885                 qw(commitdiff_plain patch patches project_index blame_data);
 886         map { $actions_info{$_}{'output_format'} = 'xml' }
 887                 qw(rss atom opml); # there are different types (document formats) of XML
 888         map { $actions_info{$_}{'output_format'} = undef }
 889                 qw(blob_plain object);
 890         $actions_info{'snapshot'}{'output_format'} = 'binary';
 891 }
 892
 893 sub action_outputs_html {
 894         my $action = shift;
 895         return $actions_info{$action}{'output_format'} eq 'html';
 896 }
 897
 898 sub browser_is_robot {
 899         return 1 if !exists $ENV{'HTTP_USER_AGENT'}; # gitweb run as script
 900         if (eval { require HTTP::BrowserDetect; }) {
 901                 my $browser = HTTP::BrowserDetect->new();
 902                 return $browser->robot();
 903         }
 904         # fallback on detecting known web browsers
 905         return 0 if ($ENV{'HTTP_USER_AGENT'} =~ /\b(?:Mozilla|Opera|Safari|IE)\b/);
 906         # be conservative; if not sure, assume non-interactive
 907         return 1;
 908 }
 909
 910 # fill %input_params with the CGI parameters. All values except for 'opt'
 911 # should be single values, but opt can be an array. We should probably
 912 # build an array of parameters that can be multi-valued, but since for the time
 913 # being it's only this one, we just single it out
 914 sub evaluate_query_params {
 915         our $cgi;
 916
 917         while (my ($name, $symbol) = each %cgi_param_mapping) {
 918                 if ($symbol eq 'opt') {
 919                         $input_params{$name} = [ $cgi->param($symbol) ];
 920                 } else {
 921                         $input_params{$name} = $cgi->param($symbol);
 922                 }
 923         }
 924 }
 925
 926 # now read PATH_INFO and update the parameter list for missing parameters
 927 sub evaluate_path_info {
 928         return if defined $input_params{'project'};
 929         return if !$path_info;
 930         $path_info =~ s,^/+,,;
 931         return if !$path_info;
 932
 933         # find which part of PATH_INFO is project
 934         my $project = $path_info;
 935         $project =~ s,/+$,,;
 936         while ($project && !check_head_link("$projectroot/$project")) {
 937                 $project =~ s,/*[^/]*$,,;
 938         }
 939         return unless $project;
 940         $input_params{'project'} = $project;
 941
 942         # do not change any parameters if an action is given using the query string
 943         return if $input_params{'action'};
 944         $path_info =~ s,^\Q$project\E/*,,;
 945
 946         # next, check if we have an action
 947         my $action = $path_info;
 948         $action =~ s,/.*$,,;
 949         if (exists $actions{$action}) {
 950                 $path_info =~ s,^$action/*,,;
 951                 $input_params{'action'} = $action;
 952         }
 953
 954         # list of actions that want hash_base instead of hash, but can have no
 955         # pathname (f) parameter
 956         my @wants_base = (
 957                 'tree',
 958                 'history',
 959         );
 960
 961         # we want to catch, among others
 962         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 963         my ($parentrefname, $parentpathname, $refname, $pathname) =
 964                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 965
 966         # first, analyze the 'current' part
 967         if (defined $pathname) {
 968                 # we got "branch:filename" or "branch:dir/"
 969                 # we could use git_get_type(branch:pathname), but:
 970                 # - it needs $git_dir
 971                 # - it does a git() call
 972                 # - the convention of terminating directories with a slash
 973                 #   makes it superfluous
 974                 # - embedding the action in the PATH_INFO would make it even
 975                 #   more superfluous
 976                 $pathname =~ s,^/+,,;
 977                 if (!$pathname || substr($pathname, -1) eq "/") {
 978                         $input_params{'action'} ||= "tree";
 979                         $pathname =~ s,/$,,;
 980                 } else {
 981                         # the default action depends on whether we had parent info
 982                         # or not
 983                         if ($parentrefname) {
 984                                 $input_params{'action'} ||= "blobdiff_plain";
 985                         } else {
 986                                 $input_params{'action'} ||= "blob_plain";
 987                         }
 988                 }
 989                 $input_params{'hash_base'} ||= $refname;
 990                 $input_params{'file_name'} ||= $pathname;
 991         } elsif (defined $refname) {
 992                 # we got "branch". In this case we have to choose if we have to
 993                 # set hash or hash_base.
 994                 #
 995                 # Most of the actions without a pathname only want hash to be
 996                 # set, except for the ones specified in @wants_base that want
 997                 # hash_base instead. It should also be noted that hand-crafted
 998                 # links having 'history' as an action and no pathname or hash
 999                 # set will fail, but that happens regardless of PATH_INFO.
1000                 if (defined $parentrefname) {
1001                         # if there is parent let the default be 'shortlog' action
1002                         # (for http://git.example.com/repo.git/A..B links); if there
1003                         # is no parent, dispatch will detect type of object and set
1004                         # action appropriately if required (if action is not set)
1005                         $input_params{'action'} ||= "shortlog";
1006                 }
1007                 if ($input_params{'action'} &&
1008                     grep { $_ eq $input_params{'action'} } @wants_base) {
1009                         $input_params{'hash_base'} ||= $refname;
1010                 } else {
1011                         $input_params{'hash'} ||= $refname;
1012                 }
1013         }
1014
1015         # next, handle the 'parent' part, if present
1016         if (defined $parentrefname) {
1017                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
1018                 # someproject/blobdiff/oldrev..newrev:/filename
1019                 if ($parentpathname) {
1020                         $parentpathname =~ s,^/+,,;
1021                         $parentpathname =~ s,/$,,;
1022                         $input_params{'file_parent'} ||= $parentpathname;
1023                 } else {
1024                         $input_params{'file_parent'} ||= $input_params{'file_name'};
1025                 }
1026                 # we assume that hash_parent_base is wanted if a path was specified,
1027                 # or if the action wants hash_base instead of hash
1028                 if (defined $input_params{'file_parent'} ||
1029                         grep { $_ eq $input_params{'action'} } @wants_base) {
1030                         $input_params{'hash_parent_base'} ||= $parentrefname;
1031                 } else {
1032                         $input_params{'hash_parent'} ||= $parentrefname;
1033                 }
1034         }
1035
1036         # for the snapshot action, we allow URLs in the form
1037         # $project/snapshot/$hash.ext
1038         # where .ext determines the snapshot and gets removed from the
1039         # passed $refname to provide the $hash.
1040         #
1041         # To be able to tell that $refname includes the format extension, we
1042         # require the following two conditions to be satisfied:
1043         # - the hash input parameter MUST have been set from the $refname part
1044         #   of the URL (i.e. they must be equal)
1045         # - the snapshot format MUST NOT have been defined already (e.g. from
1046         #   CGI parameter sf)
1047         # It's also useless to try any matching unless $refname has a dot,
1048         # so we check for that too
1049         if (defined $input_params{'action'} &&
1050                 $input_params{'action'} eq 'snapshot' &&
1051                 defined $refname && index($refname, '.') != -1 &&
1052                 $refname eq $input_params{'hash'} &&
1053                 !defined $input_params{'snapshot_format'}) {
1054                 # We loop over the known snapshot formats, checking for
1055                 # extensions. Allowed extensions are both the defined suffix
1056                 # (which includes the initial dot already) and the snapshot
1057                 # format key itself, with a prepended dot
1058                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1059                         my $hash = $refname;
1060                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1061                                 next;
1062                         }
1063                         my $sfx = $1;
1064                         # a valid suffix was found, so set the snapshot format
1065                         # and reset the hash parameter
1066                         $input_params{'snapshot_format'} = $fmt;
1067                         $input_params{'hash'} = $hash;
1068                         # we also set the format suffix to the one requested
1069                         # in the URL: this way a request for e.g. .tgz returns
1070                         # a .tgz instead of a .tar.gz
1071                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1072                         last;
1073                 }
1074         }
1075 }
1076
1077 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1078      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1079      $searchtext, $search_regexp);
1080 sub evaluate_and_validate_params {
1081         our $action = $input_params{'action'};
1082         if (defined $action) {
1083                 if (!validate_action($action)) {
1084                         die_error(400, "Invalid action parameter");
1085                 }
1086         }
1087
1088         # parameters which are pathnames
1089         our $project = $input_params{'project'};
1090         if (defined $project) {
1091                 if (!validate_project($project)) {
1092                         undef $project;
1093                         die_error(404, "No such project");
1094                 }
1095         }
1096
1097         our $file_name = $input_params{'file_name'};
1098         if (defined $file_name) {
1099                 if (!validate_pathname($file_name)) {
1100                         die_error(400, "Invalid file parameter");
1101                 }
1102         }
1103
1104         our $file_parent = $input_params{'file_parent'};
1105         if (defined $file_parent) {
1106                 if (!validate_pathname($file_parent)) {
1107                         die_error(400, "Invalid file parent parameter");
1108                 }
1109         }
1110
1111         # parameters which are refnames
1112         our $hash = $input_params{'hash'};
1113         if (defined $hash) {
1114                 if (!validate_refname($hash)) {
1115                         die_error(400, "Invalid hash parameter");
1116                 }
1117         }
1118
1119         our $hash_parent = $input_params{'hash_parent'};
1120         if (defined $hash_parent) {
1121                 if (!validate_refname($hash_parent)) {
1122                         die_error(400, "Invalid hash parent parameter");
1123                 }
1124         }
1125
1126         our $hash_base = $input_params{'hash_base'};
1127         if (defined $hash_base) {
1128                 if (!validate_refname($hash_base)) {
1129                         die_error(400, "Invalid hash base parameter");
1130                 }
1131         }
1132
1133         our @extra_options = @{$input_params{'extra_options'}};
1134         # @extra_options is always defined, since it can only be (currently) set from
1135         # CGI, and $cgi->param() returns the empty array in array context if the param
1136         # is not set
1137         foreach my $opt (@extra_options) {
1138                 if (not exists $allowed_options{$opt}) {
1139                         die_error(400, "Invalid option parameter");
1140                 }
1141                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1142                         die_error(400, "Invalid option parameter for this action");
1143                 }
1144         }
1145
1146         our $hash_parent_base = $input_params{'hash_parent_base'};
1147         if (defined $hash_parent_base) {
1148                 if (!validate_refname($hash_parent_base)) {
1149                         die_error(400, "Invalid hash parent base parameter");
1150                 }
1151         }
1152
1153         # other parameters
1154         our $page = $input_params{'page'};
1155         if (defined $page) {
1156                 if ($page =~ m/[^0-9]/) {
1157                         die_error(400, "Invalid page parameter");
1158                 }
1159         }
1160
1161         our $searchtype = $input_params{'searchtype'};
1162         if (defined $searchtype) {
1163                 if ($searchtype =~ m/[^a-z]/) {
1164                         die_error(400, "Invalid searchtype parameter");
1165                 }
1166         }
1167
1168         our $search_use_regexp = $input_params{'search_use_regexp'};
1169
1170         our $searchtext = $input_params{'searchtext'};
1171         our $search_regexp;
1172         if (defined $searchtext) {
1173                 if (length($searchtext) < 2) {
1174                         die_error(403, "At least two characters are required for search parameter");
1175                 }
1176                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1177         }
1178 }
1179
1180 # path to the current git repository
1181 our $git_dir;
1182 sub evaluate_git_dir {
1183         our $git_dir = "$projectroot/$project" if $project;
1184 }
1185
1186 our (@snapshot_fmts, $git_avatar);
1187 sub configure_gitweb_features {
1188         # list of supported snapshot formats
1189         our @snapshot_fmts = gitweb_get_feature('snapshot');
1190         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1191
1192         # check that the avatar feature is set to a known provider name,
1193         # and for each provider check if the dependencies are satisfied.
1194         # if the provider name is invalid or the dependencies are not met,
1195         # reset $git_avatar to the empty string.
1196         our ($git_avatar) = gitweb_get_feature('avatar');
1197         if ($git_avatar eq 'gravatar') {
1198                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1199         } elsif ($git_avatar eq 'picon') {
1200                 # no dependencies
1201         } else {
1202                 $git_avatar = '';
1203         }
1204 }
1205
1206 # custom error handler for caching engine (Internal Server Error)
1207 sub cache_error_handler {
1208         my $error = shift;
1209
1210         $error = to_utf8($error);
1211         $error =
1212                 "Error in caching layer: <i>".ref($cache)."</i><br>\n".
1213                 CGI::escapeHTML($error);
1214         # die_error() would exit
1215         die_error(undef, undef, $error);
1216 }
1217 # custom error handler: 'die <message>' is Internal Server Error
1218 sub handle_errors_html {
1219         my $msg = shift; # it is already HTML escaped
1220
1221         # to avoid infinite loop where error occurs in die_error,
1222         # change handler to default handler, disabling handle_errors_html
1223         set_message("Error occured when inside die_error:\n$msg");
1224
1225         # you cannot jump out of die_error when called as error handler;
1226         # the subroutine set via CGI::Carp::set_message is called _after_
1227         # HTTP headers are already written, so it cannot write them itself
1228         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1229 }
1230 set_message(\&handle_errors_html);
1231
1232 # dispatch
1233 sub dispatch {
1234         if (!defined $action) {
1235                 if (defined $hash) {
1236                         $action = git_get_type($hash);
1237                 } elsif (defined $hash_base && defined $file_name) {
1238                         $action = git_get_type("$hash_base:$file_name");
1239                 } elsif (defined $project) {
1240                         $action = 'summary';
1241                 } else {
1242                         $action = 'project_list';
1243                 }
1244         }
1245         if (!defined($actions{$action})) {
1246                 die_error(400, "Unknown action");
1247         }
1248         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1249             !$project) {
1250                 die_error(400, "Project needed");
1251         }
1252
1253         if ($caching_enabled) {
1254                 # human readable key identifying gitweb output
1255                 my $output_key = href(-replay => 1, -full => 1, -path_info => 0);
1256
1257                 cache_output($cache, $capture, $output_key, $actions{$action});
1258         } else {
1259                 $actions{$action}->();
1260         }
1261 }
1262
1263 sub reset_timer {
1264         our $t0 = [Time::HiRes::gettimeofday()]
1265                 if defined $t0;
1266         our $number_of_git_cmds = 0;
1267 }
1268
1269 sub run_request {
1270         reset_timer();
1271
1272         evaluate_uri();
1273         evaluate_gitweb_config();
1274         evaluate_git_version();
1275         check_loadavg();
1276         configure_caching()
1277                 if ($caching_enabled);
1278
1279         # $projectroot and $projects_list might be set in gitweb config file
1280         $projects_list ||= $projectroot;
1281
1282         evaluate_query_params();
1283         evaluate_path_info();
1284         evaluate_and_validate_params();
1285         evaluate_git_dir();
1286
1287         configure_gitweb_features();
1288
1289         dispatch();
1290 }
1291
1292 our $is_last_request = sub { 1 };
1293 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1294 our $CGI = 'CGI';
1295 our $cgi;
1296 sub configure_as_fcgi {
1297         require CGI::Fast;
1298         our $CGI = 'CGI::Fast';
1299
1300         my $request_number = 0;
1301         # let each child service 100 requests
1302         our $is_last_request = sub { ++$request_number > 100 };
1303 }
1304 sub evaluate_argv {
1305         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1306         configure_as_fcgi()
1307                 if $script_name =~ /\.fcgi$/;
1308
1309         return unless (@ARGV);
1310
1311         require Getopt::Long;
1312         Getopt::Long::GetOptions(
1313                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1314                 'nproc|n=i' => sub {
1315                         my ($arg, $val) = @_;
1316                         return unless eval { require FCGI::ProcManager; 1; };
1317                         my $proc_manager = FCGI::ProcManager->new({
1318                                 n_processes => $val,
1319                         });
1320                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1321                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1322                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1323                 },
1324         );
1325 }
1326
1327 sub run {
1328         evaluate_argv();
1329         evaluate_actions_info();
1330
1331         $pre_listen_hook->()
1332                 if $pre_listen_hook;
1333
1334  REQUEST:
1335         while ($cgi = $CGI->new()) {
1336                 $pre_dispatch_hook->()
1337                         if $pre_dispatch_hook;
1338
1339                 run_request();
1340
1341                 $post_dispatch_hook->()
1342                         if $post_dispatch_hook;
1343
1344                 last REQUEST if ($is_last_request->());
1345         }
1346
1347  DONE_GITWEB:
1348         1;
1349 }
1350
1351 sub configure_caching {
1352         if (!eval { require GitwebCache::CacheOutput; 1; }) {
1353                 # cache is configured _before_ handling request, so $cgi is not defined,
1354                 # so we can't just "die" with sending error message to web browser
1355                 #die_error(500, "Caching enabled and GitwebCache::CacheOutput not found");
1356
1357                 # turn off caching and warn instead
1358                 $caching_enabled = 0;
1359                 warn "Caching enabled and GitwebCache::CacheOutput not found";
1360         }
1361         GitwebCache::CacheOutput->import();
1362
1363         # $cache might be initialized (instantiated) cache, i.e. cache object,
1364         # or it might be name of class, or it might be undefined
1365         unless (defined $cache && ref($cache)) {
1366                 $cache ||= 'GitwebCache::FileCacheWithLocking';
1367                 eval "require $cache";
1368                 die $@ if $@;
1369
1370                 # support for legacy config variables configuring cache behavior
1371                 # (those variables are/were used by caching engine by John Hawley,
1372                 # used among others by custom gitweb at http://git.kernel.org);
1373                 # it assumes that if those variables are defined, then we should
1374                 # use them - no provision is made for having both legacy variables
1375                 # and new %cache_options set in config file(s).
1376                 $cache_options{'cache_root'} = $cachedir if defined $cachedir;
1377                 $cache_options{'expires_min'} = $minCacheTime if defined $minCacheTime;
1378                 $cache_options{'expires_max'} = $maxCacheTime if defined $maxCacheTime;
1379                 $cache_options{'background_cache'} = $backgroundCache if defined $backgroundCache;
1380                 $cache_options{'max_lifetime'} = $maxCacheLife if defined $maxCacheLife;
1381
1382                 $cache = $cache->new({
1383                         %cache_options,
1384                         #'cache_root' => '/tmp/cache',
1385                         #'cache_depth' => 2,
1386                         #'expires_in' => 20, # in seconds (CHI compatibile)
1387                         # (Cache::Cache compatibile initialization)
1388                         'default_expires_in' => $cache_options{'expires_in'},
1389                         # (CHI compatibile initialization)
1390                         'root_dir' => $cache_options{'cache_root'},
1391                         'depth' => $cache_options{'cache_depth'},
1392                         'on_get_error' => $cache_options{'on_error'},
1393                         'on_set_error' => $cache_options{'on_error'},
1394                 });
1395         }
1396         unless (defined $capture && ref($capture)) {
1397                 require GitwebCache::Capture::Simple;
1398                 $capture = GitwebCache::Capture::Simple->new();
1399         }
1400 }
1401
1402 run();
1403
1404 if (defined caller) {
1405         # wrapped in a subroutine processing requests,
1406         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1407         return;
1408 } else {
1409         # pure CGI script, serving single request
1410         exit;
1411 }
1412
1413 ## ======================================================================
1414 ## action links
1415
1416 # possible values of extra options
1417 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1418 # -replay => 1      - start from a current view (replay with modifications)
1419 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1420 sub href {
1421         my %params = @_;
1422         # default is to use -absolute url() i.e. $my_uri
1423         my $href = $params{-full} ? $my_url : $my_uri;
1424
1425         $params{'project'} = $project unless exists $params{'project'};
1426
1427         if ($params{-replay}) {
1428                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1429                         if (!exists $params{$name}) {
1430                                 $params{$name} = $input_params{$name};
1431                         }
1432                 }
1433         }
1434
1435         my $use_pathinfo = gitweb_check_feature('pathinfo');
1436         if (defined $params{'project'} &&
1437             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1438                 # try to put as many parameters as possible in PATH_INFO:
1439                 #   - project name
1440                 #   - action
1441                 #   - hash_parent or hash_parent_base:/file_parent
1442                 #   - hash or hash_base:/filename
1443                 #   - the snapshot_format as an appropriate suffix
1444
1445                 # When the script is the root DirectoryIndex for the domain,
1446                 # $href here would be something like http://gitweb.example.com/
1447                 # Thus, we strip any trailing / from $href, to spare us double
1448                 # slashes in the final URL
1449                 $href =~ s,/$,,;
1450
1451                 # Then add the project name, if present
1452                 $href .= "/".esc_url($params{'project'});
1453                 delete $params{'project'};
1454
1455                 # since we destructively absorb parameters, we keep this
1456                 # boolean that remembers if we're handling a snapshot
1457                 my $is_snapshot = $params{'action'} eq 'snapshot';
1458
1459                 # Summary just uses the project path URL, any other action is
1460                 # added to the URL
1461                 if (defined $params{'action'}) {
1462                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1463                         delete $params{'action'};
1464                 }
1465
1466                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1467                 # stripping nonexistent or useless pieces
1468                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1469                         || $params{'hash_parent'} || $params{'hash'});
1470                 if (defined $params{'hash_base'}) {
1471                         if (defined $params{'hash_parent_base'}) {
1472                                 $href .= esc_url($params{'hash_parent_base'});
1473                                 # skip the file_parent if it's the same as the file_name
1474                                 if (defined $params{'file_parent'}) {
1475                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1476                                                 delete $params{'file_parent'};
1477                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1478                                                 $href .= ":/".esc_url($params{'file_parent'});
1479                                                 delete $params{'file_parent'};
1480                                         }
1481                                 }
1482                                 $href .= "..";
1483                                 delete $params{'hash_parent'};
1484                                 delete $params{'hash_parent_base'};
1485                         } elsif (defined $params{'hash_parent'}) {
1486                                 $href .= esc_url($params{'hash_parent'}). "..";
1487                                 delete $params{'hash_parent'};
1488                         }
1489
1490                         $href .= esc_url($params{'hash_base'});
1491                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1492                                 $href .= ":/".esc_url($params{'file_name'});
1493                                 delete $params{'file_name'};
1494                         }
1495                         delete $params{'hash'};
1496                         delete $params{'hash_base'};
1497                 } elsif (defined $params{'hash'}) {
1498                         $href .= esc_url($params{'hash'});
1499                         delete $params{'hash'};
1500                 }
1501
1502                 # If the action was a snapshot, we can absorb the
1503                 # snapshot_format parameter too
1504                 if ($is_snapshot) {
1505                         my $fmt = $params{'snapshot_format'};
1506                         # snapshot_format should always be defined when href()
1507                         # is called, but just in case some code forgets, we
1508                         # fall back to the default
1509                         $fmt ||= $snapshot_fmts[0];
1510                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1511                         delete $params{'snapshot_format'};
1512                 }
1513         }
1514
1515         # now encode the parameters explicitly
1516         my @result = ();
1517         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1518                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1519                 if (defined $params{$name}) {
1520                         if (ref($params{$name}) eq "ARRAY") {
1521                                 foreach my $par (@{$params{$name}}) {
1522                                         push @result, $symbol . "=" . esc_param($par);
1523                                 }
1524                         } else {
1525                                 push @result, $symbol . "=" . esc_param($params{$name});
1526                         }
1527                 }
1528         }
1529         $href .= "?" . join(';', @result) if scalar @result;
1530
1531         return $href;
1532 }
1533
1534
1535 ## ======================================================================
1536 ## validation, quoting/unquoting and escaping
1537
1538 sub validate_action {
1539         my $input = shift || return undef;
1540         return undef unless exists $actions{$input};
1541         return $input;
1542 }
1543
1544 sub validate_project {
1545         my $input = shift || return undef;
1546         if (!validate_pathname($input) ||
1547                 !(-d "$projectroot/$input") ||
1548                 !check_export_ok("$projectroot/$input") ||
1549                 ($strict_export && !project_in_list($input))) {
1550                 return undef;
1551         } else {
1552                 return $input;
1553         }
1554 }
1555
1556 sub validate_pathname {
1557         my $input = shift || return undef;
1558
1559         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1560         # at the beginning, at the end, and between slashes.
1561         # also this catches doubled slashes
1562         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1563                 return undef;
1564         }
1565         # no null characters
1566         if ($input =~ m!\0!) {
1567                 return undef;
1568         }
1569         return $input;
1570 }
1571
1572 sub validate_refname {
1573         my $input = shift || return undef;
1574
1575         # textual hashes are O.K.
1576         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1577                 return $input;
1578         }
1579         # it must be correct pathname
1580         $input = validate_pathname($input)
1581                 or return undef;
1582         # restrictions on ref name according to git-check-ref-format
1583         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1584                 return undef;
1585         }
1586         return $input;
1587 }
1588
1589 # decode sequences of octets in utf8 into Perl's internal form,
1590 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1591 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1592 sub to_utf8 {
1593         my $str = shift;
1594         return undef unless defined $str;
1595         if (utf8::valid($str)) {
1596                 utf8::decode($str);
1597                 return $str;
1598         } else {
1599                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1600         }
1601 }
1602
1603 # quote unsafe chars, but keep the slash, even when it's not
1604 # correct, but quoted slashes look too horrible in bookmarks
1605 sub esc_param {
1606         my $str = shift;
1607         return undef unless defined $str;
1608         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1609         $str =~ s/ /\+/g;
1610         return $str;
1611 }
1612
1613 # quote unsafe chars in whole URL, so some characters cannot be quoted
1614 sub esc_url {
1615         my $str = shift;
1616         return undef unless defined $str;
1617         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1618         $str =~ s/ /\+/g;
1619         return $str;
1620 }
1621
1622 # replace invalid utf8 character with SUBSTITUTION sequence
1623 sub esc_html {
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:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1635         return $str;
1636 }
1637
1638 # quote control characters and escape filename to HTML
1639 sub esc_path {
1640         my $str = shift;
1641         my %opts = @_;
1642
1643         return undef unless defined $str;
1644
1645         $str = to_utf8($str);
1646         $str = $cgi->escapeHTML($str);
1647         if ($opts{'-nbsp'}) {
1648                 $str =~ s/ /&nbsp;/g;
1649         }
1650         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1651         return $str;
1652 }
1653
1654 # Make control characters "printable", using character escape codes (CEC)
1655 sub quot_cec {
1656         my $cntrl = shift;
1657         my %opts = @_;
1658         my %es = ( # character escape codes, aka escape sequences
1659                 "\t" => '\t',   # tab            (HT)
1660                 "\n" => '\n',   # line feed      (LF)
1661                 "\r" => '\r',   # carrige return (CR)
1662                 "\f" => '\f',   # form feed      (FF)
1663                 "\b" => '\b',   # backspace      (BS)
1664                 "\a" => '\a',   # alarm (bell)   (BEL)
1665                 "\e" => '\e',   # escape         (ESC)
1666                 "\013" => '\v', # vertical tab   (VT)
1667                 "\000" => '\0', # nul character  (NUL)
1668         );
1669         my $chr = ( (exists $es{$cntrl})
1670                     ? $es{$cntrl}
1671                     : sprintf('\%2x', ord($cntrl)) );
1672         if ($opts{-nohtml}) {
1673                 return $chr;
1674         } else {
1675                 return "<span class=\"cntrl\">$chr</span>";
1676         }
1677 }
1678
1679 # Alternatively use unicode control pictures codepoints,
1680 # Unicode "printable representation" (PR)
1681 sub quot_upr {
1682         my $cntrl = shift;
1683         my %opts = @_;
1684
1685         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1686         if ($opts{-nohtml}) {
1687                 return $chr;
1688         } else {
1689                 return "<span class=\"cntrl\">$chr</span>";
1690         }
1691 }
1692
1693 # git may return quoted and escaped filenames
1694 sub unquote {
1695         my $str = shift;
1696
1697         sub unq {
1698                 my $seq = shift;
1699                 my %es = ( # character escape codes, aka escape sequences
1700                         't' => "\t",   # tab            (HT, TAB)
1701                         'n' => "\n",   # newline        (NL)
1702                         'r' => "\r",   # return         (CR)
1703                         'f' => "\f",   # form feed      (FF)
1704                         'b' => "\b",   # backspace      (BS)
1705                         'a' => "\a",   # alarm (bell)   (BEL)
1706                         'e' => "\e",   # escape         (ESC)
1707                         'v' => "\013", # vertical tab   (VT)
1708                 );
1709
1710                 if ($seq =~ m/^[0-7]{1,3}$/) {
1711                         # octal char sequence
1712                         return chr(oct($seq));
1713                 } elsif (exists $es{$seq}) {
1714                         # C escape sequence, aka character escape code
1715                         return $es{$seq};
1716                 }
1717                 # quoted ordinary character
1718                 return $seq;
1719         }
1720
1721         if ($str =~ m/^"(.*)"$/) {
1722                 # needs unquoting
1723                 $str = $1;
1724                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1725         }
1726         return $str;
1727 }
1728
1729 # escape tabs (convert tabs to spaces)
1730 sub untabify {
1731         my $line = shift;
1732
1733         while ((my $pos = index($line, "\t")) != -1) {
1734                 if (my $count = (8 - ($pos % 8))) {
1735                         my $spaces = ' ' x $count;
1736                         $line =~ s/\t/$spaces/;
1737                 }
1738         }
1739
1740         return $line;
1741 }
1742
1743 sub project_in_list {
1744         my $project = shift;
1745         my @list = git_get_projects_list();
1746         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1747 }
1748
1749 ## ----------------------------------------------------------------------
1750 ## HTML aware string manipulation
1751
1752 # Try to chop given string on a word boundary between position
1753 # $len and $len+$add_len. If there is no word boundary there,
1754 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1755 # (marking chopped part) would be longer than given string.
1756 sub chop_str {
1757         my $str = shift;
1758         my $len = shift;
1759         my $add_len = shift || 10;
1760         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1761
1762         # Make sure perl knows it is utf8 encoded so we don't
1763         # cut in the middle of a utf8 multibyte char.
1764         $str = to_utf8($str);
1765
1766         # allow only $len chars, but don't cut a word if it would fit in $add_len
1767         # if it doesn't fit, cut it if it's still longer than the dots we would add
1768         # remove chopped character entities entirely
1769
1770         # when chopping in the middle, distribute $len into left and right part
1771         # return early if chopping wouldn't make string shorter
1772         if ($where eq 'center') {
1773                 return $str if ($len + 5 >= length($str)); # filler is length 5
1774                 $len = int($len/2);
1775         } else {
1776                 return $str if ($len + 4 >= length($str)); # filler is length 4
1777         }
1778
1779         # regexps: ending and beginning with word part up to $add_len
1780         my $endre = qr/.{$len}\w{0,$add_len}/;
1781         my $begre = qr/\w{0,$add_len}.{$len}/;
1782
1783         if ($where eq 'left') {
1784                 $str =~ m/^(.*?)($begre)$/;
1785                 my ($lead, $body) = ($1, $2);
1786                 if (length($lead) > 4) {
1787                         $lead = " ...";
1788                 }
1789                 return "$lead$body";
1790
1791         } elsif ($where eq 'center') {
1792                 $str =~ m/^($endre)(.*)$/;
1793                 my ($left, $str)  = ($1, $2);
1794                 $str =~ m/^(.*?)($begre)$/;
1795                 my ($mid, $right) = ($1, $2);
1796                 if (length($mid) > 5) {
1797                         $mid = " ... ";
1798                 }
1799                 return "$left$mid$right";
1800
1801         } else {
1802                 $str =~ m/^($endre)(.*)$/;
1803                 my $body = $1;
1804                 my $tail = $2;
1805                 if (length($tail) > 4) {
1806                         $tail = "... ";
1807                 }
1808                 return "$body$tail";
1809         }
1810 }
1811
1812 # takes the same arguments as chop_str, but also wraps a <span> around the
1813 # result with a title attribute if it does get chopped. Additionally, the
1814 # string is HTML-escaped.
1815 sub chop_and_escape_str {
1816         my ($str) = @_;
1817
1818         my $chopped = chop_str(@_);
1819         if ($chopped eq $str) {
1820                 return esc_html($chopped);
1821         } else {
1822                 $str =~ s/[[:cntrl:]]/?/g;
1823                 return $cgi->span({-title=>$str}, esc_html($chopped));
1824         }
1825 }
1826
1827 ## ----------------------------------------------------------------------
1828 ## functions returning short strings
1829
1830 # CSS class for given age value (in seconds)
1831 sub age_class {
1832         my $age = shift;
1833
1834         if (!defined $age) {
1835                 return "noage";
1836         } elsif ($age < 60*60*2) {
1837                 return "age0";
1838         } elsif ($age < 60*60*24*2) {
1839                 return "age1";
1840         } else {
1841                 return "age2";
1842         }
1843 }
1844
1845 # convert age in seconds to "nn units ago" string
1846 sub age_string {
1847         my $age = shift;
1848         my $age_str;
1849
1850         if ($age > 60*60*24*365*2) {
1851                 $age_str = (int $age/60/60/24/365);
1852                 $age_str .= " years ago";
1853         } elsif ($age > 60*60*24*(365/12)*2) {
1854                 $age_str = int $age/60/60/24/(365/12);
1855                 $age_str .= " months ago";
1856         } elsif ($age > 60*60*24*7*2) {
1857                 $age_str = int $age/60/60/24/7;
1858                 $age_str .= " weeks ago";
1859         } elsif ($age > 60*60*24*2) {
1860                 $age_str = int $age/60/60/24;
1861                 $age_str .= " days ago";
1862         } elsif ($age > 60*60*2) {
1863                 $age_str = int $age/60/60;
1864                 $age_str .= " hours ago";
1865         } elsif ($age > 60*2) {
1866                 $age_str = int $age/60;
1867                 $age_str .= " min ago";
1868         } elsif ($age > 2) {
1869                 $age_str = int $age;
1870                 $age_str .= " sec ago";
1871         } else {
1872                 $age_str .= " right now";
1873         }
1874         return $age_str;
1875 }
1876
1877 use constant {
1878         S_IFINVALID => 0030000,
1879         S_IFGITLINK => 0160000,
1880 };
1881
1882 # submodule/subproject, a commit object reference
1883 sub S_ISGITLINK {
1884         my $mode = shift;
1885
1886         return (($mode & S_IFMT) == S_IFGITLINK)
1887 }
1888
1889 # convert file mode in octal to symbolic file mode string
1890 sub mode_str {
1891         my $mode = oct shift;
1892
1893         if (S_ISGITLINK($mode)) {
1894                 return 'm---------';
1895         } elsif (S_ISDIR($mode & S_IFMT)) {
1896                 return 'drwxr-xr-x';
1897         } elsif (S_ISLNK($mode)) {
1898                 return 'lrwxrwxrwx';
1899         } elsif (S_ISREG($mode)) {
1900                 # git cares only about the executable bit
1901                 if ($mode & S_IXUSR) {
1902                         return '-rwxr-xr-x';
1903                 } else {
1904                         return '-rw-r--r--';
1905                 };
1906         } else {
1907                 return '----------';
1908         }
1909 }
1910
1911 # convert file mode in octal to file type string
1912 sub file_type {
1913         my $mode = shift;
1914
1915         if ($mode !~ m/^[0-7]+$/) {
1916                 return $mode;
1917         } else {
1918                 $mode = oct $mode;
1919         }
1920
1921         if (S_ISGITLINK($mode)) {
1922                 return "submodule";
1923         } elsif (S_ISDIR($mode & S_IFMT)) {
1924                 return "directory";
1925         } elsif (S_ISLNK($mode)) {
1926                 return "symlink";
1927         } elsif (S_ISREG($mode)) {
1928                 return "file";
1929         } else {
1930                 return "unknown";
1931         }
1932 }
1933
1934 # convert file mode in octal to file type description string
1935 sub file_type_long {
1936         my $mode = shift;
1937
1938         if ($mode !~ m/^[0-7]+$/) {
1939                 return $mode;
1940         } else {
1941                 $mode = oct $mode;
1942         }
1943
1944         if (S_ISGITLINK($mode)) {
1945                 return "submodule";
1946         } elsif (S_ISDIR($mode & S_IFMT)) {
1947                 return "directory";
1948         } elsif (S_ISLNK($mode)) {
1949                 return "symlink";
1950         } elsif (S_ISREG($mode)) {
1951                 if ($mode & S_IXUSR) {
1952                         return "executable";
1953                 } else {
1954                         return "file";
1955                 };
1956         } else {
1957                 return "unknown";
1958         }
1959 }
1960
1961
1962 ## ----------------------------------------------------------------------
1963 ## functions returning short HTML fragments, or transforming HTML fragments
1964 ## which don't belong to other sections
1965
1966 # format line of commit message.
1967 sub format_log_line_html {
1968         my $line = shift;
1969
1970         $line = esc_html($line, -nbsp=>1);
1971         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1972                 $cgi->a({-href => href(action=>"object", hash=>$1),
1973                                         -class => "text"}, $1);
1974         }eg;
1975
1976         return $line;
1977 }
1978
1979 # format marker of refs pointing to given object
1980
1981 # the destination action is chosen based on object type and current context:
1982 # - for annotated tags, we choose the tag view unless it's the current view
1983 #   already, in which case we go to shortlog view
1984 # - for other refs, we keep the current view if we're in history, shortlog or
1985 #   log view, and select shortlog otherwise
1986 sub format_ref_marker {
1987         my ($refs, $id) = @_;
1988         my $markers = '';
1989
1990         if (defined $refs->{$id}) {
1991                 foreach my $ref (@{$refs->{$id}}) {
1992                         # this code exploits the fact that non-lightweight tags are the
1993                         # only indirect objects, and that they are the only objects for which
1994                         # we want to use tag instead of shortlog as action
1995                         my ($type, $name) = qw();
1996                         my $indirect = ($ref =~ s/\^\{\}$//);
1997                         # e.g. tags/v2.6.11 or heads/next
1998                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1999                                 $type = $1;
2000                                 $name = $2;
2001                         } else {
2002                                 $type = "ref";
2003                                 $name = $ref;
2004                         }
2005
2006                         my $class = $type;
2007                         $class .= " indirect" if $indirect;
2008
2009                         my $dest_action = "shortlog";
2010
2011                         if ($indirect) {
2012                                 $dest_action = "tag" unless $action eq "tag";
2013                         } elsif ($action =~ /^(history|(short)?log)$/) {
2014                                 $dest_action = $action;
2015                         }
2016
2017                         my $dest = "";
2018                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2019                         $dest .= $ref;
2020
2021                         my $link = $cgi->a({
2022                                 -href => href(
2023                                         action=>$dest_action,
2024                                         hash=>$dest
2025                                 )}, $name);
2026
2027                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
2028                                 $link . "</span>";
2029                 }
2030         }
2031
2032         if ($markers) {
2033                 return ' <span class="refs">'. $markers . '</span>';
2034         } else {
2035                 return "";
2036         }
2037 }
2038
2039 # format, perhaps shortened and with markers, title line
2040 sub format_subject_html {
2041         my ($long, $short, $href, $extra) = @_;
2042         $extra = '' unless defined($extra);
2043
2044         if (length($short) < length($long)) {
2045                 $long =~ s/[[:cntrl:]]/?/g;
2046                 return $cgi->a({-href => $href, -class => "list subject",
2047                                 -title => to_utf8($long)},
2048                        esc_html($short)) . $extra;
2049         } else {
2050                 return $cgi->a({-href => $href, -class => "list subject"},
2051                        esc_html($long)) . $extra;
2052         }
2053 }
2054
2055 # Rather than recomputing the url for an email multiple times, we cache it
2056 # after the first hit. This gives a visible benefit in views where the avatar
2057 # for the same email is used repeatedly (e.g. shortlog).
2058 # The cache is shared by all avatar engines (currently gravatar only), which
2059 # are free to use it as preferred. Since only one avatar engine is used for any
2060 # given page, there's no risk for cache conflicts.
2061 our %avatar_cache = ();
2062
2063 # Compute the picon url for a given email, by using the picon search service over at
2064 # http://www.cs.indiana.edu/picons/search.html
2065 sub picon_url {
2066         my $email = lc shift;
2067         if (!$avatar_cache{$email}) {
2068                 my ($user, $domain) = split('@', $email);
2069                 $avatar_cache{$email} =
2070                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2071                         "$domain/$user/" .
2072                         "users+domains+unknown/up/single";
2073         }
2074         return $avatar_cache{$email};
2075 }
2076
2077 # Compute the gravatar url for a given email, if it's not in the cache already.
2078 # Gravatar stores only the part of the URL before the size, since that's the
2079 # one computationally more expensive. This also allows reuse of the cache for
2080 # different sizes (for this particular engine).
2081 sub gravatar_url {
2082         my $email = lc shift;
2083         my $size = shift;
2084         $avatar_cache{$email} ||=
2085                 "http://www.gravatar.com/avatar/" .
2086                         Digest::MD5::md5_hex($email) . "?s=";
2087         return $avatar_cache{$email} . $size;
2088 }
2089
2090 # Insert an avatar for the given $email at the given $size if the feature
2091 # is enabled.
2092 sub git_get_avatar {
2093         my ($email, %opts) = @_;
2094         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2095         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2096         $opts{-size} ||= 'default';
2097         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2098         my $url = "";
2099         if ($git_avatar eq 'gravatar') {
2100                 $url = gravatar_url($email, $size);
2101         } elsif ($git_avatar eq 'picon') {
2102                 $url = picon_url($email);
2103         }
2104         # Other providers can be added by extending the if chain, defining $url
2105         # as needed. If no variant puts something in $url, we assume avatars
2106         # are completely disabled/unavailable.
2107         if ($url) {
2108                 return $pre_white .
2109                        "<img width=\"$size\" " .
2110                             "class=\"avatar\" " .
2111                             "src=\"$url\" " .
2112                             "alt=\"\" " .
2113                        "/>" . $post_white;
2114         } else {
2115                 return "";
2116         }
2117 }
2118
2119 sub format_search_author {
2120         my ($author, $searchtype, $displaytext) = @_;
2121         my $have_search = gitweb_check_feature('search');
2122
2123         if ($have_search) {
2124                 my $performed = "";
2125                 if ($searchtype eq 'author') {
2126                         $performed = "authored";
2127                 } elsif ($searchtype eq 'committer') {
2128                         $performed = "committed";
2129                 }
2130
2131                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2132                                 searchtext=>$author,
2133                                 searchtype=>$searchtype), class=>"list",
2134                                 title=>"Search for commits $performed by $author"},
2135                                 $displaytext);
2136
2137         } else {
2138                 return $displaytext;
2139         }
2140 }
2141
2142 # format the author name of the given commit with the given tag
2143 # the author name is chopped and escaped according to the other
2144 # optional parameters (see chop_str).
2145 sub format_author_html {
2146         my $tag = shift;
2147         my $co = shift;
2148         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2149         return "<$tag class=\"author\">" .
2150                format_search_author($co->{'author_name'}, "author",
2151                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2152                        $author) .
2153                "</$tag>";
2154 }
2155
2156 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2157 sub format_git_diff_header_line {
2158         my $line = shift;
2159         my $diffinfo = shift;
2160         my ($from, $to) = @_;
2161
2162         if ($diffinfo->{'nparents'}) {
2163                 # combined diff
2164                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2165                 if ($to->{'href'}) {
2166                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2167                                          esc_path($to->{'file'}));
2168                 } else { # file was deleted (no href)
2169                         $line .= esc_path($to->{'file'});
2170                 }
2171         } else {
2172                 # "ordinary" diff
2173                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2174                 if ($from->{'href'}) {
2175                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2176                                          'a/' . esc_path($from->{'file'}));
2177                 } else { # file was added (no href)
2178                         $line .= 'a/' . esc_path($from->{'file'});
2179                 }
2180                 $line .= ' ';
2181                 if ($to->{'href'}) {
2182                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2183                                          'b/' . esc_path($to->{'file'}));
2184                 } else { # file was deleted
2185                         $line .= 'b/' . esc_path($to->{'file'});
2186                 }
2187         }
2188
2189         return "<div class=\"diff header\">$line</div>\n";
2190 }
2191
2192 # format extended diff header line, before patch itself
2193 sub format_extended_diff_header_line {
2194         my $line = shift;
2195         my $diffinfo = shift;
2196         my ($from, $to) = @_;
2197
2198         # match <path>
2199         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2200                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2201                                        esc_path($from->{'file'}));
2202         }
2203         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2204                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2205                                  esc_path($to->{'file'}));
2206         }
2207         # match single <mode>
2208         if ($line =~ m/\s(\d{6})$/) {
2209                 $line .= '<span class="info"> (' .
2210                          file_type_long($1) .
2211                          ')</span>';
2212         }
2213         # match <hash>
2214         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2215                 # can match only for combined diff
2216                 $line = 'index ';
2217                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2218                         if ($from->{'href'}[$i]) {
2219                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2220                                                   -class=>"hash"},
2221                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2222                         } else {
2223                                 $line .= '0' x 7;
2224                         }
2225                         # separator
2226                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2227                 }
2228                 $line .= '..';
2229                 if ($to->{'href'}) {
2230                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2231                                          substr($diffinfo->{'to_id'},0,7));
2232                 } else {
2233                         $line .= '0' x 7;
2234                 }
2235
2236         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2237                 # can match only for ordinary diff
2238                 my ($from_link, $to_link);
2239                 if ($from->{'href'}) {
2240                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2241                                              substr($diffinfo->{'from_id'},0,7));
2242                 } else {
2243                         $from_link = '0' x 7;
2244                 }
2245                 if ($to->{'href'}) {
2246                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2247                                            substr($diffinfo->{'to_id'},0,7));
2248                 } else {
2249                         $to_link = '0' x 7;
2250                 }
2251                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2252                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2253         }
2254
2255         return $line . "<br/>\n";
2256 }
2257
2258 # format from-file/to-file diff header
2259 sub format_diff_from_to_header {
2260         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2261         my $line;
2262         my $result = '';
2263
2264         $line = $from_line;
2265         #assert($line =~ m/^---/) if DEBUG;
2266         # no extra formatting for "^--- /dev/null"
2267         if (! $diffinfo->{'nparents'}) {
2268                 # ordinary (single parent) diff
2269                 if ($line =~ m!^--- "?a/!) {
2270                         if ($from->{'href'}) {
2271                                 $line = '--- a/' .
2272                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2273                                                 esc_path($from->{'file'}));
2274                         } else {
2275                                 $line = '--- a/' .
2276                                         esc_path($from->{'file'});
2277                         }
2278                 }
2279                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2280
2281         } else {
2282                 # combined diff (merge commit)
2283                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2284                         if ($from->{'href'}[$i]) {
2285                                 $line = '--- ' .
2286                                         $cgi->a({-href=>href(action=>"blobdiff",
2287                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2288                                                              hash_parent_base=>$parents[$i],
2289                                                              file_parent=>$from->{'file'}[$i],
2290                                                              hash=>$diffinfo->{'to_id'},
2291                                                              hash_base=>$hash,
2292                                                              file_name=>$to->{'file'}),
2293                                                  -class=>"path",
2294                                                  -title=>"diff" . ($i+1)},
2295                                                 $i+1) .
2296                                         '/' .
2297                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2298                                                 esc_path($from->{'file'}[$i]));
2299                         } else {
2300                                 $line = '--- /dev/null';
2301                         }
2302                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2303                 }
2304         }
2305
2306         $line = $to_line;
2307         #assert($line =~ m/^\+\+\+/) if DEBUG;
2308         # no extra formatting for "^+++ /dev/null"
2309         if ($line =~ m!^\+\+\+ "?b/!) {
2310                 if ($to->{'href'}) {
2311                         $line = '+++ b/' .
2312                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2313                                         esc_path($to->{'file'}));
2314                 } else {
2315                         $line = '+++ b/' .
2316                                 esc_path($to->{'file'});
2317                 }
2318         }
2319         $result .= qq!<div class="diff to_file">$line</div>\n!;
2320
2321         return $result;
2322 }
2323
2324 # create note for patch simplified by combined diff
2325 sub format_diff_cc_simplified {
2326         my ($diffinfo, @parents) = @_;
2327         my $result = '';
2328
2329         $result .= "<div class=\"diff header\">" .
2330                    "diff --cc ";
2331         if (!is_deleted($diffinfo)) {
2332                 $result .= $cgi->a({-href => href(action=>"blob",
2333                                                   hash_base=>$hash,
2334                                                   hash=>$diffinfo->{'to_id'},
2335                                                   file_name=>$diffinfo->{'to_file'}),
2336                                     -class => "path"},
2337                                    esc_path($diffinfo->{'to_file'}));
2338         } else {
2339                 $result .= esc_path($diffinfo->{'to_file'});
2340         }
2341         $result .= "</div>\n" . # class="diff header"
2342                    "<div class=\"diff nodifferences\">" .
2343                    "Simple merge" .
2344                    "</div>\n"; # class="diff nodifferences"
2345
2346         return $result;
2347 }
2348
2349 # format patch (diff) line (not to be used for diff headers)
2350 sub format_diff_line {
2351         my $line = shift;
2352         my ($from, $to) = @_;
2353         my $diff_class = "";
2354
2355         chomp $line;
2356
2357         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2358                 # combined diff
2359                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2360                 if ($line =~ m/^\@{3}/) {
2361                         $diff_class = " chunk_header";
2362                 } elsif ($line =~ m/^\\/) {
2363                         $diff_class = " incomplete";
2364                 } elsif ($prefix =~ tr/+/+/) {
2365                         $diff_class = " add";
2366                 } elsif ($prefix =~ tr/-/-/) {
2367                         $diff_class = " rem";
2368                 }
2369         } else {
2370                 # assume ordinary diff
2371                 my $char = substr($line, 0, 1);
2372                 if ($char eq '+') {
2373                         $diff_class = " add";
2374                 } elsif ($char eq '-') {
2375                         $diff_class = " rem";
2376                 } elsif ($char eq '@') {
2377                         $diff_class = " chunk_header";
2378                 } elsif ($char eq "\\") {
2379                         $diff_class = " incomplete";
2380                 }
2381         }
2382         $line = untabify($line);
2383         if ($from && $to && $line =~ m/^\@{2} /) {
2384                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2385                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2386
2387                 $from_lines = 0 unless defined $from_lines;
2388                 $to_lines   = 0 unless defined $to_lines;
2389
2390                 if ($from->{'href'}) {
2391                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2392                                              -class=>"list"}, $from_text);
2393                 }
2394                 if ($to->{'href'}) {
2395                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2396                                              -class=>"list"}, $to_text);
2397                 }
2398                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2399                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2400                 return "<div class=\"diff$diff_class\">$line</div>\n";
2401         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2402                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2403                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2404
2405                 @from_text = split(' ', $ranges);
2406                 for (my $i = 0; $i < @from_text; ++$i) {
2407                         ($from_start[$i], $from_nlines[$i]) =
2408                                 (split(',', substr($from_text[$i], 1)), 0);
2409                 }
2410
2411                 $to_text   = pop @from_text;
2412                 $to_start  = pop @from_start;
2413                 $to_nlines = pop @from_nlines;
2414
2415                 $line = "<span class=\"chunk_info\">$prefix ";
2416                 for (my $i = 0; $i < @from_text; ++$i) {
2417                         if ($from->{'href'}[$i]) {
2418                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2419                                                   -class=>"list"}, $from_text[$i]);
2420                         } else {
2421                                 $line .= $from_text[$i];
2422                         }
2423                         $line .= " ";
2424                 }
2425                 if ($to->{'href'}) {
2426                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2427                                           -class=>"list"}, $to_text);
2428                 } else {
2429                         $line .= $to_text;
2430                 }
2431                 $line .= " $prefix</span>" .
2432                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2433                 return "<div class=\"diff$diff_class\">$line</div>\n";
2434         }
2435         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2436 }
2437
2438 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2439 # linked.  Pass the hash of the tree/commit to snapshot.
2440 sub format_snapshot_links {
2441         my ($hash) = @_;
2442         my $num_fmts = @snapshot_fmts;
2443         if ($num_fmts > 1) {
2444                 # A parenthesized list of links bearing format names.
2445                 # e.g. "snapshot (_tar.gz_ _zip_)"
2446                 return "snapshot (" . join(' ', map
2447                         $cgi->a({
2448                                 -href => href(
2449                                         action=>"snapshot",
2450                                         hash=>$hash,
2451                                         snapshot_format=>$_
2452                                 )
2453                         }, $known_snapshot_formats{$_}{'display'})
2454                 , @snapshot_fmts) . ")";
2455         } elsif ($num_fmts == 1) {
2456                 # A single "snapshot" link whose tooltip bears the format name.
2457                 # i.e. "_snapshot_"
2458                 my ($fmt) = @snapshot_fmts;
2459                 return
2460                         $cgi->a({
2461                                 -href => href(
2462                                         action=>"snapshot",
2463                                         hash=>$hash,
2464                                         snapshot_format=>$fmt
2465                                 ),
2466                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2467                         }, "snapshot");
2468         } else { # $num_fmts == 0
2469                 return undef;
2470         }
2471 }
2472
2473 ## ......................................................................
2474 ## functions returning values to be passed, perhaps after some
2475 ## transformation, to other functions; e.g. returning arguments to href()
2476
2477 # returns hash to be passed to href to generate gitweb URL
2478 # in -title key it returns description of link
2479 sub get_feed_info {
2480         my $format = shift || 'Atom';
2481         my %res = (action => lc($format));
2482
2483         # feed links are possible only for project views
2484         return unless (defined $project);
2485         # some views should link to OPML, or to generic project feed,
2486         # or don't have specific feed yet (so they should use generic)
2487         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2488
2489         my $branch;
2490         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2491         # from tag links; this also makes possible to detect branch links
2492         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2493             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2494                 $branch = $1;
2495         }
2496         # find log type for feed description (title)
2497         my $type = 'log';
2498         if (defined $file_name) {
2499                 $type  = "history of $file_name";
2500                 $type .= "/" if ($action eq 'tree');
2501                 $type .= " on '$branch'" if (defined $branch);
2502         } else {
2503                 $type = "log of $branch" if (defined $branch);
2504         }
2505
2506         $res{-title} = $type;
2507         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2508         $res{'file_name'} = $file_name;
2509
2510         return %res;
2511 }
2512
2513 ## ----------------------------------------------------------------------
2514 ## git utility subroutines, invoking git commands
2515
2516 # returns path to the core git executable and the --git-dir parameter as list
2517 sub git_cmd {
2518         $number_of_git_cmds++;
2519         return $GIT, '--git-dir='.$git_dir;
2520 }
2521
2522 # quote the given arguments for passing them to the shell
2523 # quote_command("command", "arg 1", "arg with ' and ! characters")
2524 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2525 # Try to avoid using this function wherever possible.
2526 sub quote_command {
2527         return join(' ',
2528                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2529 }
2530
2531 # get HEAD ref of given project as hash
2532 sub git_get_head_hash {
2533         return git_get_full_hash(shift, 'HEAD');
2534 }
2535
2536 sub git_get_full_hash {
2537         return git_get_hash(@_);
2538 }
2539
2540 sub git_get_short_hash {
2541         return git_get_hash(@_, '--short=7');
2542 }
2543
2544 sub git_get_hash {
2545         my ($project, $hash, @options) = @_;
2546         my $o_git_dir = $git_dir;
2547         my $retval = undef;
2548         $git_dir = "$projectroot/$project";
2549         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2550             '--verify', '-q', @options, $hash) {
2551                 $retval = <$fd>;
2552                 chomp $retval if defined $retval;
2553                 close $fd;
2554         }
2555         if (defined $o_git_dir) {
2556                 $git_dir = $o_git_dir;
2557         }
2558         return $retval;
2559 }
2560
2561 # get type of given object
2562 sub git_get_type {
2563         my $hash = shift;
2564
2565         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2566         my $type = <$fd>;
2567         close $fd or return;
2568         chomp $type;
2569         return $type;
2570 }
2571
2572 # repository configuration
2573 our $config_file = '';
2574 our %config;
2575
2576 # store multiple values for single key as anonymous array reference
2577 # single values stored directly in the hash, not as [ <value> ]
2578 sub hash_set_multi {
2579         my ($hash, $key, $value) = @_;
2580
2581         if (!exists $hash->{$key}) {
2582                 $hash->{$key} = $value;
2583         } elsif (!ref $hash->{$key}) {
2584                 $hash->{$key} = [ $hash->{$key}, $value ];
2585         } else {
2586                 push @{$hash->{$key}}, $value;
2587         }
2588 }
2589
2590 # return hash of git project configuration
2591 # optionally limited to some section, e.g. 'gitweb'
2592 sub git_parse_project_config {
2593         my $section_regexp = shift;
2594         my %config;
2595
2596         local $/ = "\0";
2597
2598         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2599                 or return;
2600
2601         while (my $keyval = <$fh>) {
2602                 chomp $keyval;
2603                 my ($key, $value) = split(/\n/, $keyval, 2);
2604
2605                 hash_set_multi(\%config, $key, $value)
2606                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2607         }
2608         close $fh;
2609
2610         return %config;
2611 }
2612
2613 # convert config value to boolean: 'true' or 'false'
2614 # no value, number > 0, 'true' and 'yes' values are true
2615 # rest of values are treated as false (never as error)
2616 sub config_to_bool {
2617         my $val = shift;
2618
2619         return 1 if !defined $val;             # section.key
2620
2621         # strip leading and trailing whitespace
2622         $val =~ s/^\s+//;
2623         $val =~ s/\s+$//;
2624
2625         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2626                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2627 }
2628
2629 # convert config value to simple decimal number
2630 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2631 # to be multiplied by 1024, 1048576, or 1073741824
2632 sub config_to_int {
2633         my $val = shift;
2634
2635         # strip leading and trailing whitespace
2636         $val =~ s/^\s+//;
2637         $val =~ s/\s+$//;
2638
2639         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2640                 $unit = lc($unit);
2641                 # unknown unit is treated as 1
2642                 return $num * ($unit eq 'g' ? 1073741824 :
2643                                $unit eq 'm' ?    1048576 :
2644                                $unit eq 'k' ?       1024 : 1);
2645         }
2646         return $val;
2647 }
2648
2649 # convert config value to array reference, if needed
2650 sub config_to_multi {
2651         my $val = shift;
2652
2653         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2654 }
2655
2656 sub git_get_project_config {
2657         my ($key, $type) = @_;
2658
2659         return unless defined $git_dir;
2660
2661         # key sanity check
2662         return unless ($key);
2663         $key =~ s/^gitweb\.//;
2664         return if ($key =~ m/\W/);
2665
2666         # type sanity check
2667         if (defined $type) {
2668                 $type =~ s/^--//;
2669                 $type = undef
2670                         unless ($type eq 'bool' || $type eq 'int');
2671         }
2672
2673         # get config
2674         if (!defined $config_file ||
2675             $config_file ne "$git_dir/config") {
2676                 %config = git_parse_project_config('gitweb');
2677                 $config_file = "$git_dir/config";
2678         }
2679
2680         # check if config variable (key) exists
2681         return unless exists $config{"gitweb.$key"};
2682
2683         # ensure given type
2684         if (!defined $type) {
2685                 return $config{"gitweb.$key"};
2686         } elsif ($type eq 'bool') {
2687                 # backward compatibility: 'git config --bool' returns true/false
2688                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2689         } elsif ($type eq 'int') {
2690                 return config_to_int($config{"gitweb.$key"});
2691         }
2692         return $config{"gitweb.$key"};
2693 }
2694
2695 # get hash of given path at given ref
2696 sub git_get_hash_by_path {
2697         my $base = shift;
2698         my $path = shift || return undef;
2699         my $type = shift;
2700
2701         $path =~ s,/+$,,;
2702
2703         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2704                 or die_error(500, "Open git-ls-tree failed");
2705         my $line = <$fd>;
2706         close $fd or return undef;
2707
2708         if (!defined $line) {
2709                 # there is no tree or hash given by $path at $base
2710                 return undef;
2711         }
2712
2713         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2714         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2715         if (defined $type && $type ne $2) {
2716                 # type doesn't match
2717                 return undef;
2718         }
2719         return $3;
2720 }
2721
2722 # get path of entry with given hash at given tree-ish (ref)
2723 # used to get 'from' filename for combined diff (merge commit) for renames
2724 sub git_get_path_by_hash {
2725         my $base = shift || return;
2726         my $hash = shift || return;
2727
2728         local $/ = "\0";
2729
2730         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2731                 or return undef;
2732         while (my $line = <$fd>) {
2733                 chomp $line;
2734
2735                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2736                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2737                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2738                         close $fd;
2739                         return $1;
2740                 }
2741         }
2742         close $fd;
2743         return undef;
2744 }
2745
2746 ## ......................................................................
2747 ## git utility functions, directly accessing git repository
2748
2749 sub git_get_project_description {
2750         my $path = shift;
2751
2752         $git_dir = "$projectroot/$path";
2753         open my $fd, '<', "$git_dir/description"
2754                 or return git_get_project_config('description');
2755         my $descr = <$fd>;
2756         close $fd;
2757         if (defined $descr) {
2758                 chomp $descr;
2759         }
2760         return $descr;
2761 }
2762
2763 sub git_get_project_ctags {
2764         my $path = shift;
2765         my $ctags = {};
2766
2767         $git_dir = "$projectroot/$path";
2768         opendir my $dh, "$git_dir/ctags"
2769                 or return $ctags;
2770         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2771                 open my $ct, '<', $_ or next;
2772                 my $val = <$ct>;
2773                 chomp $val;
2774                 close $ct;
2775                 my $ctag = $_; $ctag =~ s#.*/##;
2776                 $ctags->{$ctag} = $val;
2777         }
2778         closedir $dh;
2779         $ctags;
2780 }
2781
2782 sub git_populate_project_tagcloud {
2783         my $ctags = shift;
2784
2785         # First, merge different-cased tags; tags vote on casing
2786         my %ctags_lc;
2787         foreach (keys %$ctags) {
2788                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2789                 if (not $ctags_lc{lc $_}->{topcount}
2790                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2791                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2792                         $ctags_lc{lc $_}->{topname} = $_;
2793                 }
2794         }
2795
2796         my $cloud;
2797         if (eval { require HTML::TagCloud; 1; }) {
2798                 $cloud = HTML::TagCloud->new;
2799                 foreach (sort keys %ctags_lc) {
2800                         # Pad the title with spaces so that the cloud looks
2801                         # less crammed.
2802                         my $title = $ctags_lc{$_}->{topname};
2803                         $title =~ s/ /&nbsp;/g;
2804                         $title =~ s/^/&nbsp;/g;
2805                         $title =~ s/$/&nbsp;/g;
2806                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2807                 }
2808         } else {
2809                 $cloud = \%ctags_lc;
2810         }
2811         $cloud;
2812 }
2813
2814 sub git_show_project_tagcloud {
2815         my ($cloud, $count) = @_;
2816         print STDERR ref($cloud)."..\n";
2817         if (ref $cloud eq 'HTML::TagCloud') {
2818                 return $cloud->html_and_css($count);
2819         } else {
2820                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2821                 return '<p align="center">' . join (', ', map {
2822                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2823                 } splice(@tags, 0, $count)) . '</p>';
2824         }
2825 }
2826
2827 sub git_get_project_url_list {
2828         my $path = shift;
2829
2830         $git_dir = "$projectroot/$path";
2831         open my $fd, '<', "$git_dir/cloneurl"
2832                 or return wantarray ?
2833                 @{ config_to_multi(git_get_project_config('url')) } :
2834                    config_to_multi(git_get_project_config('url'));
2835         my @git_project_url_list = map { chomp; $_ } <$fd>;
2836         close $fd;
2837
2838         return wantarray ? @git_project_url_list : \@git_project_url_list;
2839 }
2840
2841 sub git_get_projects_list {
2842         my ($filter) = @_;
2843         my @list;
2844
2845         $filter ||= '';
2846         $filter =~ s/\.git$//;
2847
2848         my $check_forks = gitweb_check_feature('forks');
2849
2850         if (-d $projects_list) {
2851                 # search in directory
2852                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2853                 # remove the trailing "/"
2854                 $dir =~ s!/+$!!;
2855                 my $pfxlen = length("$dir");
2856                 my $pfxdepth = ($dir =~ tr!/!!);
2857
2858                 File::Find::find({
2859                         follow_fast => 1, # follow symbolic links
2860                         follow_skip => 2, # ignore duplicates
2861                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2862                         wanted => sub {
2863                                 # global variables
2864                                 our $project_maxdepth;
2865                                 our $projectroot;
2866                                 # skip project-list toplevel, if we get it.
2867                                 return if (m!^[/.]$!);
2868                                 # only directories can be git repositories
2869                                 return unless (-d $_);
2870                                 # don't traverse too deep (Find is super slow on os x)
2871                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2872                                         $File::Find::prune = 1;
2873                                         return;
2874                                 }
2875
2876                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2877                                 # we check related file in $projectroot
2878                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2879                                 if (check_export_ok("$projectroot/$path")) {
2880                                         push @list, { path => $path };
2881                                         $File::Find::prune = 1;
2882                                 }
2883                         },
2884                 }, "$dir");
2885
2886         } elsif (-f $projects_list) {
2887                 # read from file(url-encoded):
2888                 # 'git%2Fgit.git Linus+Torvalds'
2889                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2890                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2891                 my %paths;
2892                 open my $fd, '<', $projects_list or return;
2893         PROJECT:
2894                 while (my $line = <$fd>) {
2895                         chomp $line;
2896                         my ($path, $owner) = split ' ', $line;
2897                         $path = unescape($path);
2898                         $owner = unescape($owner);
2899                         if (!defined $path) {
2900                                 next;
2901                         }
2902                         if ($filter ne '') {
2903                                 # looking for forks;
2904                                 my $pfx = substr($path, 0, length($filter));
2905                                 if ($pfx ne $filter) {
2906                                         next PROJECT;
2907                                 }
2908                                 my $sfx = substr($path, length($filter));
2909                                 if ($sfx !~ /^\/.*\.git$/) {
2910                                         next PROJECT;
2911                                 }
2912                         } elsif ($check_forks) {
2913                         PATH:
2914                                 foreach my $filter (keys %paths) {
2915                                         # looking for forks;
2916                                         my $pfx = substr($path, 0, length($filter));
2917                                         if ($pfx ne $filter) {
2918                                                 next PATH;
2919                                         }
2920                                         my $sfx = substr($path, length($filter));
2921                                         if ($sfx !~ /^\/.*\.git$/) {
2922                                                 next PATH;
2923                                         }
2924                                         # is a fork, don't include it in
2925                                         # the list
2926                                         next PROJECT;
2927                                 }
2928                         }
2929                         if (check_export_ok("$projectroot/$path")) {
2930                                 my $pr = {
2931                                         path => $path,
2932                                         owner => to_utf8($owner),
2933                                 };
2934                                 push @list, $pr;
2935                                 (my $forks_path = $path) =~ s/\.git$//;
2936                                 $paths{$forks_path}++;
2937                         }
2938                 }
2939                 close $fd;
2940         }
2941         return @list;
2942 }
2943
2944 our $gitweb_project_owner = undef;
2945 sub git_get_project_list_from_file {
2946
2947         return if (defined $gitweb_project_owner);
2948
2949         $gitweb_project_owner = {};
2950         # read from file (url-encoded):
2951         # 'git%2Fgit.git Linus+Torvalds'
2952         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2953         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2954         if (-f $projects_list) {
2955                 open(my $fd, '<', $projects_list);
2956                 while (my $line = <$fd>) {
2957                         chomp $line;
2958                         my ($pr, $ow) = split ' ', $line;
2959                         $pr = unescape($pr);
2960                         $ow = unescape($ow);
2961                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2962                 }
2963                 close $fd;
2964         }
2965 }
2966
2967 sub git_get_project_owner {
2968         my $project = shift;
2969         my $owner;
2970
2971         return undef unless $project;
2972         $git_dir = "$projectroot/$project";
2973
2974         if (!defined $gitweb_project_owner) {
2975                 git_get_project_list_from_file();
2976         }
2977
2978         if (exists $gitweb_project_owner->{$project}) {
2979                 $owner = $gitweb_project_owner->{$project};
2980         }
2981         if (!defined $owner){
2982                 $owner = git_get_project_config('owner');
2983         }
2984         if (!defined $owner) {
2985                 $owner = get_file_owner("$git_dir");
2986         }
2987
2988         return $owner;
2989 }
2990
2991 sub git_get_last_activity {
2992         my ($path) = @_;
2993         my $fd;
2994
2995         $git_dir = "$projectroot/$path";
2996         open($fd, "-|", git_cmd(), 'for-each-ref',
2997              '--format=%(committer)',
2998              '--sort=-committerdate',
2999              '--count=1',
3000              'refs/heads') or return;
3001         my $most_recent = <$fd>;
3002         close $fd or return;
3003         if (defined $most_recent &&
3004             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3005                 my $timestamp = $1;
3006                 my $age = time - $timestamp;
3007                 return ($age, age_string($age));
3008         }
3009         return (undef, undef);
3010 }
3011
3012 sub git_get_references {
3013         my $type = shift || "";
3014         my %refs;
3015         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3016         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3017         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3018                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3019                 or return;
3020
3021         while (my $line = <$fd>) {
3022                 chomp $line;
3023                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3024                         if (defined $refs{$1}) {
3025                                 push @{$refs{$1}}, $2;
3026                         } else {
3027                                 $refs{$1} = [ $2 ];
3028                         }
3029                 }
3030         }
3031         close $fd or return;
3032         return \%refs;
3033 }
3034
3035 sub git_get_rev_name_tags {
3036         my $hash = shift || return undef;
3037
3038         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3039                 or return;
3040         my $name_rev = <$fd>;
3041         close $fd;
3042
3043         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3044                 return $1;
3045         } else {
3046                 # catches also '$hash undefined' output
3047                 return undef;
3048         }
3049 }
3050
3051 ## ----------------------------------------------------------------------
3052 ## parse to hash functions
3053
3054 sub parse_date {
3055         my $epoch = shift;
3056         my $tz = shift || "-0000";
3057
3058         my %date;
3059         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3060         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3061         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3062         $date{'hour'} = $hour;
3063         $date{'minute'} = $min;
3064         $date{'mday'} = $mday;
3065         $date{'day'} = $days[$wday];
3066         $date{'month'} = $months[$mon];
3067         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3068                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3069         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3070                              $mday, $months[$mon], $hour ,$min;
3071         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3072                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3073
3074         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
3075         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
3076         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3077         $date{'hour_local'} = $hour;
3078         $date{'minute_local'} = $min;
3079         $date{'tz_local'} = $tz;
3080         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3081                                   1900+$year, $mon+1, $mday,
3082                                   $hour, $min, $sec, $tz);
3083         return %date;
3084 }
3085
3086 sub parse_tag {
3087         my $tag_id = shift;
3088         my %tag;
3089         my @comment;
3090
3091         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3092         $tag{'id'} = $tag_id;
3093         while (my $line = <$fd>) {
3094                 chomp $line;
3095                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3096                         $tag{'object'} = $1;
3097                 } elsif ($line =~ m/^type (.+)$/) {
3098                         $tag{'type'} = $1;
3099                 } elsif ($line =~ m/^tag (.+)$/) {
3100                         $tag{'name'} = $1;
3101                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3102                         $tag{'author'} = $1;
3103                         $tag{'author_epoch'} = $2;
3104                         $tag{'author_tz'} = $3;
3105                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3106                                 $tag{'author_name'}  = $1;
3107                                 $tag{'author_email'} = $2;
3108                         } else {
3109                                 $tag{'author_name'} = $tag{'author'};
3110                         }
3111                 } elsif ($line =~ m/--BEGIN/) {
3112                         push @comment, $line;
3113                         last;
3114                 } elsif ($line eq "") {
3115                         last;
3116                 }
3117         }
3118         push @comment, <$fd>;
3119         $tag{'comment'} = \@comment;
3120         close $fd or return;
3121         if (!defined $tag{'name'}) {
3122                 return
3123         };
3124         return %tag
3125 }
3126
3127 sub parse_commit_text {
3128         my ($commit_text, $withparents) = @_;
3129         my @commit_lines = split '\n', $commit_text;
3130         my %co;
3131
3132         pop @commit_lines; # Remove '\0'
3133
3134         if (! @commit_lines) {
3135                 return;
3136         }
3137
3138         my $header = shift @commit_lines;
3139         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3140                 return;
3141         }
3142         ($co{'id'}, my @parents) = split ' ', $header;
3143         while (my $line = shift @commit_lines) {
3144                 last if $line eq "\n";
3145                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3146                         $co{'tree'} = $1;
3147                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3148                         push @parents, $1;
3149                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3150                         $co{'author'} = to_utf8($1);
3151                         $co{'author_epoch'} = $2;
3152                         $co{'author_tz'} = $3;
3153                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3154                                 $co{'author_name'}  = $1;
3155                                 $co{'author_email'} = $2;
3156                         } else {
3157                                 $co{'author_name'} = $co{'author'};
3158                         }
3159                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3160                         $co{'committer'} = to_utf8($1);
3161                         $co{'committer_epoch'} = $2;
3162                         $co{'committer_tz'} = $3;
3163                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3164                                 $co{'committer_name'}  = $1;
3165                                 $co{'committer_email'} = $2;
3166                         } else {
3167                                 $co{'committer_name'} = $co{'committer'};
3168                         }
3169                 }
3170         }
3171         if (!defined $co{'tree'}) {
3172                 return;
3173         };
3174         $co{'parents'} = \@parents;
3175         $co{'parent'} = $parents[0];
3176
3177         foreach my $title (@commit_lines) {
3178                 $title =~ s/^    //;
3179                 if ($title ne "") {
3180                         $co{'title'} = chop_str($title, 80, 5);
3181                         # remove leading stuff of merges to make the interesting part visible
3182                         if (length($title) > 50) {
3183                                 $title =~ s/^Automatic //;
3184                                 $title =~ s/^merge (of|with) /Merge ... /i;
3185                                 if (length($title) > 50) {
3186                                         $title =~ s/(http|rsync):\/\///;
3187                                 }
3188                                 if (length($title) > 50) {
3189                                         $title =~ s/(master|www|rsync)\.//;
3190                                 }
3191                                 if (length($title) > 50) {
3192                                         $title =~ s/kernel.org:?//;
3193                                 }
3194                                 if (length($title) > 50) {
3195                                         $title =~ s/\/pub\/scm//;
3196                                 }
3197                         }
3198                         $co{'title_short'} = chop_str($title, 50, 5);
3199                         last;
3200                 }
3201         }
3202         if (! defined $co{'title'} || $co{'title'} eq "") {
3203                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3204         }
3205         # remove added spaces
3206         foreach my $line (@commit_lines) {
3207                 $line =~ s/^    //;
3208         }
3209         $co{'comment'} = \@commit_lines;
3210
3211         my $age = time - $co{'committer_epoch'};
3212         $co{'age'} = $age;
3213         $co{'age_string'} = age_string($age);
3214         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3215         if ($age > 60*60*24*7*2) {
3216                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3217                 $co{'age_string_age'} = $co{'age_string'};
3218         } else {
3219                 $co{'age_string_date'} = $co{'age_string'};
3220                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3221         }
3222         return %co;
3223 }
3224
3225 sub parse_commit {
3226         my ($commit_id) = @_;
3227         my %co;
3228
3229         local $/ = "\0";
3230
3231         open my $fd, "-|", git_cmd(), "rev-list",
3232                 "--parents",
3233                 "--header",
3234                 "--max-count=1",
3235                 $commit_id,
3236                 "--",
3237                 or die_error(500, "Open git-rev-list failed");
3238         %co = parse_commit_text(<$fd>, 1);
3239         close $fd;
3240
3241         return %co;
3242 }
3243
3244 sub parse_commits {
3245         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3246         my @cos;
3247
3248         $maxcount ||= 1;
3249         $skip ||= 0;
3250
3251         local $/ = "\0";
3252
3253         open my $fd, "-|", git_cmd(), "rev-list",
3254                 "--header",
3255                 @args,
3256                 ("--max-count=" . $maxcount),
3257                 ("--skip=" . $skip),
3258                 @extra_options,
3259                 $commit_id,
3260                 "--",
3261                 ($filename ? ($filename) : ())
3262                 or die_error(500, "Open git-rev-list failed");
3263         while (my $line = <$fd>) {
3264                 my %co = parse_commit_text($line);
3265                 push @cos, \%co;
3266         }
3267         close $fd;
3268
3269         return wantarray ? @cos : \@cos;
3270 }
3271
3272 # parse line of git-diff-tree "raw" output
3273 sub parse_difftree_raw_line {
3274         my $line = shift;
3275         my %res;
3276
3277         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3278         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3279         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3280                 $res{'from_mode'} = $1;
3281                 $res{'to_mode'} = $2;
3282                 $res{'from_id'} = $3;
3283                 $res{'to_id'} = $4;
3284                 $res{'status'} = $5;
3285                 $res{'similarity'} = $6;
3286                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3287                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3288                 } else {
3289                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3290                 }
3291         }
3292         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3293         # combined diff (for merge commit)
3294         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3295                 $res{'nparents'}  = length($1);
3296                 $res{'from_mode'} = [ split(' ', $2) ];
3297                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3298                 $res{'from_id'} = [ split(' ', $3) ];
3299                 $res{'to_id'} = pop @{$res{'from_id'}};
3300                 $res{'status'} = [ split('', $4) ];
3301                 $res{'to_file'} = unquote($5);
3302         }
3303         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3304         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3305                 $res{'commit'} = $1;
3306         }
3307
3308         return wantarray ? %res : \%res;
3309 }
3310
3311 # wrapper: return parsed line of git-diff-tree "raw" output
3312 # (the argument might be raw line, or parsed info)
3313 sub parsed_difftree_line {
3314         my $line_or_ref = shift;
3315
3316         if (ref($line_or_ref) eq "HASH") {
3317                 # pre-parsed (or generated by hand)
3318                 return $line_or_ref;
3319         } else {
3320                 return parse_difftree_raw_line($line_or_ref);
3321         }
3322 }
3323
3324 # parse line of git-ls-tree output
3325 sub parse_ls_tree_line {
3326         my $line = shift;
3327         my %opts = @_;
3328         my %res;
3329
3330         if ($opts{'-l'}) {
3331                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3332                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3333
3334                 $res{'mode'} = $1;
3335                 $res{'type'} = $2;
3336                 $res{'hash'} = $3;
3337                 $res{'size'} = $4;
3338                 if ($opts{'-z'}) {
3339                         $res{'name'} = $5;
3340                 } else {
3341                         $res{'name'} = unquote($5);
3342                 }
3343         } else {
3344                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3345                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3346
3347                 $res{'mode'} = $1;
3348                 $res{'type'} = $2;
3349                 $res{'hash'} = $3;
3350                 if ($opts{'-z'}) {
3351                         $res{'name'} = $4;
3352                 } else {
3353                         $res{'name'} = unquote($4);
3354                 }
3355         }
3356
3357         return wantarray ? %res : \%res;
3358 }
3359
3360 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3361 sub parse_from_to_diffinfo {
3362         my ($diffinfo, $from, $to, @parents) = @_;
3363
3364         if ($diffinfo->{'nparents'}) {
3365                 # combined diff
3366                 $from->{'file'} = [];
3367                 $from->{'href'} = [];
3368                 fill_from_file_info($diffinfo, @parents)
3369                         unless exists $diffinfo->{'from_file'};
3370                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3371                         $from->{'file'}[$i] =
3372                                 defined $diffinfo->{'from_file'}[$i] ?
3373                                         $diffinfo->{'from_file'}[$i] :
3374                                         $diffinfo->{'to_file'};
3375                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3376                                 $from->{'href'}[$i] = href(action=>"blob",
3377                                                            hash_base=>$parents[$i],
3378                                                            hash=>$diffinfo->{'from_id'}[$i],
3379                                                            file_name=>$from->{'file'}[$i]);
3380                         } else {
3381                                 $from->{'href'}[$i] = undef;
3382                         }
3383                 }
3384         } else {
3385                 # ordinary (not combined) diff
3386                 $from->{'file'} = $diffinfo->{'from_file'};
3387                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3388                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3389                                                hash=>$diffinfo->{'from_id'},
3390                                                file_name=>$from->{'file'});
3391                 } else {
3392                         delete $from->{'href'};
3393                 }
3394         }
3395
3396         $to->{'file'} = $diffinfo->{'to_file'};
3397         if (!is_deleted($diffinfo)) { # file exists in result
3398                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3399                                      hash=>$diffinfo->{'to_id'},
3400                                      file_name=>$to->{'file'});
3401         } else {
3402                 delete $to->{'href'};
3403         }
3404 }
3405
3406 ## ......................................................................
3407 ## parse to array of hashes functions
3408
3409 sub git_get_heads_list {
3410         my $limit = shift;
3411         my @headslist;
3412
3413         open my $fd, '-|', git_cmd(), 'for-each-ref',
3414                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3415                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3416                 'refs/heads'
3417                 or return;
3418         while (my $line = <$fd>) {
3419                 my %ref_item;
3420
3421                 chomp $line;
3422                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3423                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3424                 my ($committer, $epoch, $tz) =
3425                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3426                 $ref_item{'fullname'}  = $name;
3427                 $name =~ s!^refs/heads/!!;
3428
3429                 $ref_item{'name'}  = $name;
3430                 $ref_item{'id'}    = $hash;
3431                 $ref_item{'title'} = $title || '(no commit message)';
3432                 $ref_item{'epoch'} = $epoch;
3433                 if ($epoch) {
3434                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3435                 } else {
3436                         $ref_item{'age'} = "unknown";
3437                 }
3438
3439                 push @headslist, \%ref_item;
3440         }
3441         close $fd;
3442
3443         return wantarray ? @headslist : \@headslist;
3444 }
3445
3446 sub git_get_tags_list {
3447         my $limit = shift;
3448         my @tagslist;
3449
3450         open my $fd, '-|', git_cmd(), 'for-each-ref',
3451                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3452                 '--format=%(objectname) %(objecttype) %(refname) '.
3453                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3454                 'refs/tags'
3455                 or return;
3456         while (my $line = <$fd>) {
3457                 my %ref_item;
3458
3459                 chomp $line;
3460                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3461                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3462                 my ($creator, $epoch, $tz) =
3463                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3464                 $ref_item{'fullname'} = $name;
3465                 $name =~ s!^refs/tags/!!;
3466
3467                 $ref_item{'type'} = $type;
3468                 $ref_item{'id'} = $id;
3469                 $ref_item{'name'} = $name;
3470                 if ($type eq "tag") {
3471                         $ref_item{'subject'} = $title;
3472                         $ref_item{'reftype'} = $reftype;
3473                         $ref_item{'refid'}   = $refid;
3474                 } else {
3475                         $ref_item{'reftype'} = $type;
3476                         $ref_item{'refid'}   = $id;
3477                 }
3478
3479                 if ($type eq "tag" || $type eq "commit") {
3480                         $ref_item{'epoch'} = $epoch;
3481                         if ($epoch) {
3482                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3483                         } else {
3484                                 $ref_item{'age'} = "unknown";
3485                         }
3486                 }
3487
3488                 push @tagslist, \%ref_item;
3489         }
3490         close $fd;
3491
3492         return wantarray ? @tagslist : \@tagslist;
3493 }
3494
3495 ## ----------------------------------------------------------------------
3496 ## filesystem-related functions
3497
3498 sub get_file_owner {
3499         my $path = shift;
3500
3501         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3502         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3503         if (!defined $gcos) {
3504                 return undef;
3505         }
3506         my $owner = $gcos;
3507         $owner =~ s/[,;].*$//;
3508         return to_utf8($owner);
3509 }
3510
3511 # assume that file exists
3512 sub insert_file {
3513         my $filename = shift;
3514
3515         open my $fd, '<', $filename;
3516         print map { to_utf8($_) } <$fd>;
3517         close $fd;
3518 }
3519
3520 ## ......................................................................
3521 ## mimetype related functions
3522
3523 sub mimetype_guess_file {
3524         my $filename = shift;
3525         my $mimemap = shift;
3526         -r $mimemap or return undef;
3527
3528         my %mimemap;
3529         open(my $mh, '<', $mimemap) or return undef;
3530         while (<$mh>) {
3531                 next if m/^#/; # skip comments
3532                 my ($mimetype, $exts) = split(/\t+/);
3533                 if (defined $exts) {
3534                         my @exts = split(/\s+/, $exts);
3535                         foreach my $ext (@exts) {
3536                                 $mimemap{$ext} = $mimetype;
3537                         }
3538                 }
3539         }
3540         close($mh);
3541
3542         $filename =~ /\.([^.]*)$/;
3543         return $mimemap{$1};
3544 }
3545
3546 sub mimetype_guess {
3547         my $filename = shift;
3548         my $mime;
3549         $filename =~ /\./ or return undef;
3550
3551         if ($mimetypes_file) {
3552                 my $file = $mimetypes_file;
3553                 if ($file !~ m!^/!) { # if it is relative path
3554                         # it is relative to project
3555                         $file = "$projectroot/$project/$file";
3556                 }
3557                 $mime = mimetype_guess_file($filename, $file);
3558         }
3559         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3560         return $mime;
3561 }
3562
3563 sub blob_mimetype {
3564         my $fd = shift;
3565         my $filename = shift;
3566
3567         if ($filename) {
3568                 my $mime = mimetype_guess($filename);
3569                 $mime and return $mime;
3570         }
3571
3572         # just in case
3573         return $default_blob_plain_mimetype unless $fd;
3574
3575         if (-T $fd) {
3576                 return 'text/plain';
3577         } elsif (! $filename) {
3578                 return 'application/octet-stream';
3579         } elsif ($filename =~ m/\.png$/i) {
3580                 return 'image/png';
3581         } elsif ($filename =~ m/\.gif$/i) {
3582                 return 'image/gif';
3583         } elsif ($filename =~ m/\.jpe?g$/i) {
3584                 return 'image/jpeg';
3585         } else {
3586                 return 'application/octet-stream';
3587         }
3588 }
3589
3590 sub blob_contenttype {
3591         my ($fd, $file_name, $type) = @_;
3592
3593         $type ||= blob_mimetype($fd, $file_name);
3594         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3595                 $type .= "; charset=$default_text_plain_charset";
3596         }
3597
3598         return $type;
3599 }
3600
3601 # guess file syntax for syntax highlighting; return undef if no highlighting
3602 # the name of syntax can (in the future) depend on syntax highlighter used
3603 sub guess_file_syntax {
3604         my ($highlight, $mimetype, $file_name) = @_;
3605         return undef unless ($highlight && defined $file_name);
3606         my $basename = basename($file_name, '.in');
3607         return $highlight_basename{$basename}
3608                 if exists $highlight_basename{$basename};
3609
3610         $basename =~ /\.([^.]*)$/;
3611         my $ext = $1 or return undef;
3612         return $highlight_ext{$ext}
3613                 if exists $highlight_ext{$ext};
3614
3615         return undef;
3616 }
3617
3618 # run highlighter and return FD of its output,
3619 # or return original FD if no highlighting
3620 sub run_highlighter {
3621         my ($fd, $highlight, $syntax) = @_;
3622         return $fd unless ($highlight && defined $syntax);
3623
3624         close $fd
3625                 or die_error(404, "Reading blob failed");
3626         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3627                   quote_command($highlight_bin).
3628                   " --xhtml --fragment --syntax $syntax |"
3629                 or die_error(500, "Couldn't open file or run syntax highlighter");
3630         return $fd;
3631 }
3632
3633 ## ======================================================================
3634 ## functions printing HTML: header, footer, error page
3635
3636 sub get_page_title {
3637         my $title = to_utf8($site_name);
3638
3639         return $title unless (defined $project);
3640         $title .= " - " . to_utf8($project);
3641
3642         return $title unless (defined $action);
3643         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3644
3645         return $title unless (defined $file_name);
3646         $title .= " - " . esc_path($file_name);
3647         if ($action eq "tree" && $file_name !~ m|/$|) {
3648                 $title .= "/";
3649         }
3650
3651         return $title;
3652 }
3653
3654 # creates "Generating..." page when caching enabled and not in cache
3655 sub git_generating_data_html {
3656         my ($cache, $key, $lock_fh) = @_;
3657
3658         # whitelist of actions that should get "Generating..." page
3659         if (!action_outputs_html($action) ||
3660             browser_is_robot()) {
3661                 return;
3662         }
3663
3664         # Initial delay
3665         if ($generating_options{'startup_delay'} > 0) {
3666                 eval {
3667                         local $SIG{ALRM} = sub { die "alarm clock restart\n" }; # NB: \n required
3668                         alarm $generating_options{'startup_delay'};
3669                         flock($lock_fh, LOCK_SH); # blocking readers lock
3670                         alarm 0;
3671                 };
3672                 if ($@) {
3673                         # propagate unexpected errors
3674                         die $@ if $@ !~ /alarm clock restart/;
3675                 } else {
3676                         # we got response within 'startup_delay' timeout
3677                         return;
3678                 }
3679         }
3680
3681         my $title = "[Generating...] " . get_page_title();
3682         # TODO: the following line of code duplicates the one
3683         # in git_header_html, and it should probably be refactored.
3684         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3685
3686         # Use the trick that 'refresh' HTTP header equivalent (set via http-equiv)
3687         # with timeout of 0 seconds would redirect as soon as page is finished.
3688         # It assumes that browser would display partially received page.
3689         # This "Generating..." redirect page should not be cached (externally).
3690         my %no_cache = (
3691                 # HTTP/1.0
3692                 -Pragma => 'no-cache',
3693                 # HTTP/1.1
3694                 -Cache_Control => join(', ', qw(private no-cache no-store must-revalidate
3695                                                 max-age=0 pre-check=0 post-check=0)),
3696         );
3697         print STDOUT $cgi->header(-type => 'text/html', -charset => 'utf-8',
3698                                   -status=> '200 OK', -expires => 'now',
3699                                   %no_cache);
3700         print STDOUT <<"EOF";
3701 <?xml version="1.0" encoding="utf-8"?>
3702 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
3703                       "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3704 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3705 <!-- git web interface version $version -->
3706 <!-- git core binaries version $git_version -->
3707 <head>
3708 <meta http-equiv="content-type" content="text/html; charset=utf-8" />
3709 <meta http-equiv="refresh" content="0" />
3710 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version" />
3711 <meta name="robots" content="noindex, nofollow" />
3712 <title>$title</title>
3713 </head>
3714 <body>
3715 EOF
3716
3717         local $| = 1; # autoflush
3718         print STDOUT 'Generating...';
3719
3720         my $total_time = 0;
3721         my $interval = $generating_options{'print_interval'} || 1;
3722         my $timeout  = $generating_options{'timeout'};
3723         my $alarm_handler = sub {
3724                 local $! = 1;
3725                 print STDOUT '.';
3726                 $total_time += $interval;
3727                 if ($total_time > $timeout) {
3728                         die "timeout\n";
3729                 }
3730         };
3731         eval {
3732                 local $SIG{ALRM} = $alarm_handler;
3733                 Time::HiRes::alarm($interval, $interval);
3734                 my $lock_acquired;
3735                 do {
3736                         # loop is needed here because SIGALRM (from 'alarm')
3737                         # can interrupt process of acquiring lock
3738                         $lock_acquired = flock($lock_fh, LOCK_SH); # blocking readers lock
3739                 } until ($lock_acquired);
3740                 alarm 0;
3741         };
3742         # It doesn't really matter if we got lock, or timed-out
3743         # but we should re-throw unknown (unexpected) errors
3744         die $@ if ($@ and $@ !~ /timeout/);
3745
3746         print STDOUT <<"EOF";
3747
3748 </body>
3749 </html>
3750 EOF
3751
3752         # after refresh web browser would reload page and send new request
3753         goto DONE_GITWEB;
3754         #exit 0;
3755         #return;
3756 }
3757
3758 sub git_header_html {
3759         my $status = shift || "200 OK";
3760         my $expires = shift;
3761         my %opts = @_;
3762
3763         my $title = get_page_title();
3764         my $content_type;
3765         # require explicit support from the UA if we are to send the page as
3766         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3767         # we have to do this because MSIE sometimes globs '*/*', pretending to
3768         # support xhtml+xml but choking when it gets what it asked for.
3769         # Disable content-type negotiation when caching (use mimetype good for all).
3770         if (!$caching_enabled &&
3771             defined $cgi->http('HTTP_ACCEPT') &&
3772             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3773             $cgi->Accept('application/xhtml+xml') != 0) {
3774                 $content_type = 'application/xhtml+xml';
3775         } else {
3776                 $content_type = 'text/html';
3777         }
3778         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3779                            -status=> $status, -expires => $expires)
3780                 unless ($opts{'-no_http_header'});
3781         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3782         print <<EOF;
3783 <?xml version="1.0" encoding="utf-8"?>
3784 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3785 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3786 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3787 <!-- git core binaries version $git_version -->
3788 <head>
3789 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3790 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3791 <meta name="robots" content="index, nofollow"/>
3792 <title>$title</title>
3793 EOF
3794         # the stylesheet, favicon etc urls won't work correctly with path_info
3795         # unless we set the appropriate base URL
3796         # if caching is enabled we can get it from cache for path_info when it
3797         # is generated without path_info
3798         if ($ENV{'PATH_INFO'} || $caching_enabled) {
3799                 print "<base href=\"".esc_url($base_url)."\" />\n";
3800         }
3801         # print out each stylesheet that exist, providing backwards capability
3802         # for those people who defined $stylesheet in a config file
3803         if (defined $stylesheet) {
3804                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3805         } else {
3806                 foreach my $stylesheet (@stylesheets) {
3807                         next unless $stylesheet;
3808                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3809                 }
3810         }
3811         if (defined $project) {
3812                 my %href_params = get_feed_info();
3813                 if (!exists $href_params{'-title'}) {
3814                         $href_params{'-title'} = 'log';
3815                 }
3816
3817                 foreach my $format qw(RSS Atom) {
3818                         my $type = lc($format);
3819                         my %link_attr = (
3820                                 '-rel' => 'alternate',
3821                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3822                                 '-type' => "application/$type+xml"
3823                         );
3824
3825                         $href_params{'action'} = $type;
3826                         $link_attr{'-href'} = href(%href_params);
3827                         print "<link ".
3828                               "rel=\"$link_attr{'-rel'}\" ".
3829                               "title=\"$link_attr{'-title'}\" ".
3830                               "href=\"$link_attr{'-href'}\" ".
3831                               "type=\"$link_attr{'-type'}\" ".
3832                               "/>\n";
3833
3834                         $href_params{'extra_options'} = '--no-merges';
3835                         $link_attr{'-href'} = href(%href_params);
3836                         $link_attr{'-title'} .= ' (no merges)';
3837                         print "<link ".
3838                               "rel=\"$link_attr{'-rel'}\" ".
3839                               "title=\"$link_attr{'-title'}\" ".
3840                               "href=\"$link_attr{'-href'}\" ".
3841                               "type=\"$link_attr{'-type'}\" ".
3842                               "/>\n";
3843                 }
3844
3845         } else {
3846                 printf('<link rel="alternate" title="%s projects list" '.
3847                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3848                        $site_name, href(project=>undef, action=>"project_index"));
3849                 printf('<link rel="alternate" title="%s projects feeds" '.
3850                        'href="%s" type="text/x-opml" />'."\n",
3851                        $site_name, href(project=>undef, action=>"opml"));
3852         }
3853         if (defined $favicon) {
3854                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3855         }
3856
3857         print "</head>\n" .
3858               "<body>\n";
3859
3860         if (defined $site_header && -f $site_header) {
3861                 insert_file($site_header);
3862         }
3863
3864         print "<div class=\"page_header\">\n" .
3865               $cgi->a({-href => esc_url($logo_url),
3866                        -title => $logo_label},
3867                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3868         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3869         if (defined $project) {
3870                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3871                 if (defined $action) {
3872                         print " / $action";
3873                 }
3874                 print "\n";
3875         }
3876         print "</div>\n";
3877
3878         my $have_search = gitweb_check_feature('search');
3879         if (defined $project && $have_search) {
3880                 if (!defined $searchtext) {
3881                         $searchtext = "";
3882                 }
3883                 my $search_hash;
3884                 if (defined $hash_base) {
3885                         $search_hash = $hash_base;
3886                 } elsif (defined $hash) {
3887                         $search_hash = $hash;
3888                 } else {
3889                         $search_hash = "HEAD";
3890                 }
3891                 my $action = $my_uri;
3892                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3893                 if ($use_pathinfo) {
3894                         $action .= "/".esc_url($project);
3895                 }
3896                 print $cgi->startform(-method => "get", -action => $action) .
3897                       "<div class=\"search\">\n" .
3898                       (!$use_pathinfo &&
3899                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3900                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3901                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3902                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3903                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3904                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3905                       " search:\n",
3906                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3907                       "<span title=\"Extended regular expression\">" .
3908                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3909                                      -checked => $search_use_regexp) .
3910                       "</span>" .
3911                       "</div>" .
3912                       $cgi->end_form() . "\n";
3913         }
3914 }
3915
3916 sub git_footer_html {
3917         my $feed_class = 'rss_logo';
3918
3919         print "<div class=\"page_footer\">\n";
3920         if (defined $project) {
3921                 my $descr = git_get_project_description($project);
3922                 if (defined $descr) {
3923                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3924                 }
3925
3926                 my %href_params = get_feed_info();
3927                 if (!%href_params) {
3928                         $feed_class .= ' generic';
3929                 }
3930                 $href_params{'-title'} ||= 'log';
3931
3932                 foreach my $format qw(RSS Atom) {
3933                         $href_params{'action'} = lc($format);
3934                         print $cgi->a({-href => href(%href_params),
3935                                       -title => "$href_params{'-title'} $format feed",
3936                                       -class => $feed_class}, $format)."\n";
3937                 }
3938
3939         } else {
3940                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3941                               -class => $feed_class}, "OPML") . " ";
3942                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3943                               -class => $feed_class}, "TXT") . "\n";
3944         }
3945         print "</div>\n"; # class="page_footer"
3946
3947         # timing info doesn't make much sense with output (response) caching,
3948         # so when caching is enabled gitweb prints the time of page generation
3949         if ((defined $t0 || $caching_enabled) &&
3950             gitweb_check_feature('timed')) {
3951                 print "<div id=\"generating_info\">\n";
3952                 if ($caching_enabled) {
3953                         print 'This page was generated at '.
3954                               gmtime( time() )." GMT\n";
3955                 } else {
3956                         print 'This page took '.
3957                               '<span id="generating_time" class="time_span">'.
3958                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3959                               ' seconds </span>'.
3960                               ' and '.
3961                               '<span id="generating_cmd">'.
3962                               $number_of_git_cmds.
3963                               '</span> git commands '.
3964                               " to generate.\n";
3965                 }
3966                 print "</div>\n"; # class="page_footer"
3967         }
3968
3969         if (defined $site_footer && -f $site_footer) {
3970                 insert_file($site_footer);
3971         }
3972
3973         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3974         if (!$caching_enabled &&
3975             defined $action && $action eq 'blame_incremental') {
3976                 print qq!<script type="text/javascript">\n!.
3977                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3978                       qq!           "!. href() .qq!");\n!.
3979                       qq!</script>\n!;
3980         } elsif (gitweb_check_feature('javascript-actions')) {
3981                 print qq!<script type="text/javascript">\n!.
3982                       qq!window.onload = fixLinks;\n!.
3983                       qq!</script>\n!;
3984         }
3985
3986         print "</body>\n" .
3987               "</html>";
3988 }
3989
3990 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3991 # Example: die_error(404, 'Hash not found')
3992 # By convention, use the following status codes (as defined in RFC 2616):
3993 # 400: Invalid or missing CGI parameters, or
3994 #      requested object exists but has wrong type.
3995 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3996 #      this server or project.
3997 # 404: Requested object/revision/project doesn't exist.
3998 # 500: The server isn't configured properly, or
3999 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4000 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4001 # 503: The server is currently unavailable (because it is overloaded,
4002 #      or down for maintenance).  Generally, this is a temporary state.
4003 sub die_error {
4004         my $status = shift || 500;
4005         my $error = esc_html(shift) || "Internal Server Error";
4006         my $extra = shift;
4007         my %opts = @_;
4008
4009         my %http_responses = (
4010                 400 => '400 Bad Request',
4011                 403 => '403 Forbidden',
4012                 404 => '404 Not Found',
4013                 500 => '500 Internal Server Error',
4014                 503 => '503 Service Unavailable',
4015         );
4016
4017         # Do not cache error pages
4018         capture_stop($cache, $capture) if ($capture && $caching_enabled);
4019
4020         git_header_html($http_responses{$status}, undef, %opts);
4021         print <<EOF;
4022 <div class="page_body">
4023 <br /><br />
4024 $status - $error
4025 <br />
4026 EOF
4027         if (defined $extra) {
4028                 print "<hr />\n" .
4029                       "$extra\n";
4030         }
4031         print "</div>\n";
4032
4033         git_footer_html();
4034         goto DONE_GITWEB
4035                 unless ($opts{'-error_handler'});
4036 }
4037
4038 ## ----------------------------------------------------------------------
4039 ## functions printing or outputting HTML: navigation
4040
4041 sub git_print_page_nav {
4042         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4043         $extra = '' if !defined $extra; # pager or formats
4044
4045         my @navs = qw(summary shortlog log commit commitdiff tree);
4046         if ($suppress) {
4047                 @navs = grep { $_ ne $suppress } @navs;
4048         }
4049
4050         my %arg = map { $_ => {action=>$_} } @navs;
4051         if (defined $head) {
4052                 for (qw(commit commitdiff)) {
4053                         $arg{$_}{'hash'} = $head;
4054                 }
4055                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4056                         for (qw(shortlog log)) {
4057                                 $arg{$_}{'hash'} = $head;
4058                         }
4059                 }
4060         }
4061
4062         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4063         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4064
4065         my @actions = gitweb_get_feature('actions');
4066         my %repl = (
4067                 '%' => '%',
4068                 'n' => $project,         # project name
4069                 'f' => $git_dir,         # project path within filesystem
4070                 'h' => $treehead || '',  # current hash ('h' parameter)
4071                 'b' => $treebase || '',  # hash base ('hb' parameter)
4072         );
4073         while (@actions) {
4074                 my ($label, $link, $pos) = splice(@actions,0,3);
4075                 # insert
4076                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4077                 # munch munch
4078                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4079                 $arg{$label}{'_href'} = $link;
4080         }
4081
4082         print "<div class=\"page_nav\">\n" .
4083                 (join " | ",
4084                  map { $_ eq $current ?
4085                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4086                  } @navs);
4087         print "<br/>\n$extra<br/>\n" .
4088               "</div>\n";
4089 }
4090
4091 sub format_paging_nav {
4092         my ($action, $page, $has_next_link) = @_;
4093         my $paging_nav;
4094
4095
4096         if ($page > 0) {
4097                 $paging_nav .=
4098                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4099                         " &sdot; " .
4100                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4101                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4102         } else {
4103                 $paging_nav .= "first &sdot; prev";
4104         }
4105
4106         if ($has_next_link) {
4107                 $paging_nav .= " &sdot; " .
4108                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4109                                  -accesskey => "n", -title => "Alt-n"}, "next");
4110         } else {
4111                 $paging_nav .= " &sdot; next";
4112         }
4113
4114         return $paging_nav;
4115 }
4116
4117 ## ......................................................................
4118 ## functions printing or outputting HTML: div
4119
4120 sub git_print_header_div {
4121         my ($action, $title, $hash, $hash_base) = @_;
4122         my %args = ();
4123
4124         $args{'action'} = $action;
4125         $args{'hash'} = $hash if $hash;
4126         $args{'hash_base'} = $hash_base if $hash_base;
4127
4128         print "<div class=\"header\">\n" .
4129               $cgi->a({-href => href(%args), -class => "title"},
4130               $title ? $title : $action) .
4131               "\n</div>\n";
4132 }
4133
4134 sub print_local_time {
4135         print format_local_time(@_);
4136 }
4137
4138 sub format_local_time {
4139         my $localtime = '';
4140         my %date = @_;
4141         if ($date{'hour_local'} < 6) {
4142                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4143                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4144         } else {
4145                 $localtime .= sprintf(" (%02d:%02d %s)",
4146                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4147         }
4148
4149         return $localtime;
4150 }
4151
4152 # Outputs the author name and date in long form
4153 sub git_print_authorship {
4154         my $co = shift;
4155         my %opts = @_;
4156         my $tag = $opts{-tag} || 'div';
4157         my $author = $co->{'author_name'};
4158
4159         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4160         print "<$tag class=\"author_date\">" .
4161               format_search_author($author, "author", esc_html($author)) .
4162               " [$ad{'rfc2822'}";
4163         print_local_time(%ad) if ($opts{-localtime});
4164         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
4165                   . "</$tag>\n";
4166 }
4167
4168 # Outputs table rows containing the full author or committer information,
4169 # in the format expected for 'commit' view (& similar).
4170 # Parameters are a commit hash reference, followed by the list of people
4171 # to output information for. If the list is empty it defaults to both
4172 # author and committer.
4173 sub git_print_authorship_rows {
4174         my $co = shift;
4175         # too bad we can't use @people = @_ || ('author', 'committer')
4176         my @people = @_;
4177         @people = ('author', 'committer') unless @people;
4178         foreach my $who (@people) {
4179                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4180                 print "<tr><td>$who</td><td>" .
4181                       format_search_author($co->{"${who}_name"}, $who,
4182                                esc_html($co->{"${who}_name"})) . " " .
4183                       format_search_author($co->{"${who}_email"}, $who,
4184                                esc_html("<" . $co->{"${who}_email"} . ">")) .
4185                       "</td><td rowspan=\"2\">" .
4186                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4187                       "</td></tr>\n" .
4188                       "<tr>" .
4189                       "<td></td><td> $wd{'rfc2822'}";
4190                 print_local_time(%wd);
4191                 print "</td>" .
4192                       "</tr>\n";
4193         }
4194 }
4195
4196 sub git_print_page_path {
4197         my $name = shift;
4198         my $type = shift;
4199         my $hb = shift;
4200
4201
4202         print "<div class=\"page_path\">";
4203         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4204                       -title => 'tree root'}, to_utf8("[$project]"));
4205         print " / ";
4206         if (defined $name) {
4207                 my @dirname = split '/', $name;
4208                 my $basename = pop @dirname;
4209                 my $fullname = '';
4210
4211                 foreach my $dir (@dirname) {
4212                         $fullname .= ($fullname ? '/' : '') . $dir;
4213                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4214                                                      hash_base=>$hb),
4215                                       -title => $fullname}, esc_path($dir));
4216                         print " / ";
4217                 }
4218                 if (defined $type && $type eq 'blob') {
4219                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4220                                                      hash_base=>$hb),
4221                                       -title => $name}, esc_path($basename));
4222                 } elsif (defined $type && $type eq 'tree') {
4223                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4224                                                      hash_base=>$hb),
4225                                       -title => $name}, esc_path($basename));
4226                         print " / ";
4227                 } else {
4228                         print esc_path($basename);
4229                 }
4230         }
4231         print "<br/></div>\n";
4232 }
4233
4234 sub git_print_log {
4235         my $log = shift;
4236         my %opts = @_;
4237
4238         if ($opts{'-remove_title'}) {
4239                 # remove title, i.e. first line of log
4240                 shift @$log;
4241         }
4242         # remove leading empty lines
4243         while (defined $log->[0] && $log->[0] eq "") {
4244                 shift @$log;
4245         }
4246
4247         # print log
4248         my $signoff = 0;
4249         my $empty = 0;
4250         foreach my $line (@$log) {
4251                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4252                         $signoff = 1;
4253                         $empty = 0;
4254                         if (! $opts{'-remove_signoff'}) {
4255                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4256                                 next;
4257                         } else {
4258                                 # remove signoff lines
4259                                 next;
4260                         }
4261                 } else {
4262                         $signoff = 0;
4263                 }
4264
4265                 # print only one empty line
4266                 # do not print empty line after signoff
4267                 if ($line eq "") {
4268                         next if ($empty || $signoff);
4269                         $empty = 1;
4270                 } else {
4271                         $empty = 0;
4272                 }
4273
4274                 print format_log_line_html($line) . "<br/>\n";
4275         }
4276
4277         if ($opts{'-final_empty_line'}) {
4278                 # end with single empty line
4279                 print "<br/>\n" unless $empty;
4280         }
4281 }
4282
4283 # return link target (what link points to)
4284 sub git_get_link_target {
4285         my $hash = shift;
4286         my $link_target;
4287
4288         # read link
4289         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4290                 or return;
4291         {
4292                 local $/ = undef;
4293                 $link_target = <$fd>;
4294         }
4295         close $fd
4296                 or return;
4297
4298         return $link_target;
4299 }
4300
4301 # given link target, and the directory (basedir) the link is in,
4302 # return target of link relative to top directory (top tree);
4303 # return undef if it is not possible (including absolute links).
4304 sub normalize_link_target {
4305         my ($link_target, $basedir) = @_;
4306
4307         # absolute symlinks (beginning with '/') cannot be normalized
4308         return if (substr($link_target, 0, 1) eq '/');
4309
4310         # normalize link target to path from top (root) tree (dir)
4311         my $path;
4312         if ($basedir) {
4313                 $path = $basedir . '/' . $link_target;
4314         } else {
4315                 # we are in top (root) tree (dir)
4316                 $path = $link_target;
4317         }
4318
4319         # remove //, /./, and /../
4320         my @path_parts;
4321         foreach my $part (split('/', $path)) {
4322                 # discard '.' and ''
4323                 next if (!$part || $part eq '.');
4324                 # handle '..'
4325                 if ($part eq '..') {
4326                         if (@path_parts) {
4327                                 pop @path_parts;
4328                         } else {
4329                                 # link leads outside repository (outside top dir)
4330                                 return;
4331                         }
4332                 } else {
4333                         push @path_parts, $part;
4334                 }
4335         }
4336         $path = join('/', @path_parts);
4337
4338         return $path;
4339 }
4340
4341 # print tree entry (row of git_tree), but without encompassing <tr> element
4342 sub git_print_tree_entry {
4343         my ($t, $basedir, $hash_base, $have_blame) = @_;
4344
4345         my %base_key = ();
4346         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4347
4348         # The format of a table row is: mode list link.  Where mode is
4349         # the mode of the entry, list is the name of the entry, an href,
4350         # and link is the action links of the entry.
4351
4352         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4353         if (exists $t->{'size'}) {
4354                 print "<td class=\"size\">$t->{'size'}</td>\n";
4355         }
4356         if ($t->{'type'} eq "blob") {
4357                 print "<td class=\"list\">" .
4358                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4359                                                file_name=>"$basedir$t->{'name'}", %base_key),
4360                                 -class => "list"}, esc_path($t->{'name'}));
4361                 if (S_ISLNK(oct $t->{'mode'})) {
4362                         my $link_target = git_get_link_target($t->{'hash'});
4363                         if ($link_target) {
4364                                 my $norm_target = normalize_link_target($link_target, $basedir);
4365                                 if (defined $norm_target) {
4366                                         print " -> " .
4367                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4368                                                                      file_name=>$norm_target),
4369                                                        -title => $norm_target}, esc_path($link_target));
4370                                 } else {
4371                                         print " -> " . esc_path($link_target);
4372                                 }
4373                         }
4374                 }
4375                 print "</td>\n";
4376                 print "<td class=\"link\">";
4377                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4378                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4379                               "blob");
4380                 if ($have_blame) {
4381                         print " | " .
4382                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4383                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4384                                       "blame");
4385                 }
4386                 if (defined $hash_base) {
4387                         print " | " .
4388                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4389                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4390                                       "history");
4391                 }
4392                 print " | " .
4393                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4394                                                file_name=>"$basedir$t->{'name'}")},
4395                                 "raw");
4396                 print "</td>\n";
4397
4398         } elsif ($t->{'type'} eq "tree") {
4399                 print "<td class=\"list\">";
4400                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4401                                              file_name=>"$basedir$t->{'name'}",
4402                                              %base_key)},
4403                               esc_path($t->{'name'}));
4404                 print "</td>\n";
4405                 print "<td class=\"link\">";
4406                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4407                                              file_name=>"$basedir$t->{'name'}",
4408                                              %base_key)},
4409                               "tree");
4410                 if (defined $hash_base) {
4411                         print " | " .
4412                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4413                                                      file_name=>"$basedir$t->{'name'}")},
4414                                       "history");
4415                 }
4416                 print "</td>\n";
4417         } else {
4418                 # unknown object: we can only present history for it
4419                 # (this includes 'commit' object, i.e. submodule support)
4420                 print "<td class=\"list\">" .
4421                       esc_path($t->{'name'}) .
4422                       "</td>\n";
4423                 print "<td class=\"link\">";
4424                 if (defined $hash_base) {
4425                         print $cgi->a({-href => href(action=>"history",
4426                                                      hash_base=>$hash_base,
4427                                                      file_name=>"$basedir$t->{'name'}")},
4428                                       "history");
4429                 }
4430                 print "</td>\n";
4431         }
4432 }
4433
4434 ## ......................................................................
4435 ## functions printing large fragments of HTML
4436
4437 # get pre-image filenames for merge (combined) diff
4438 sub fill_from_file_info {
4439         my ($diff, @parents) = @_;
4440
4441         $diff->{'from_file'} = [ ];
4442         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4443         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4444                 if ($diff->{'status'}[$i] eq 'R' ||
4445                     $diff->{'status'}[$i] eq 'C') {
4446                         $diff->{'from_file'}[$i] =
4447                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4448                 }
4449         }
4450
4451         return $diff;
4452 }
4453
4454 # is current raw difftree line of file deletion
4455 sub is_deleted {
4456         my $diffinfo = shift;
4457
4458         return $diffinfo->{'to_id'} eq ('0' x 40);
4459 }
4460
4461 # does patch correspond to [previous] difftree raw line
4462 # $diffinfo  - hashref of parsed raw diff format
4463 # $patchinfo - hashref of parsed patch diff format
4464 #              (the same keys as in $diffinfo)
4465 sub is_patch_split {
4466         my ($diffinfo, $patchinfo) = @_;
4467
4468         return defined $diffinfo && defined $patchinfo
4469                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4470 }
4471
4472
4473 sub git_difftree_body {
4474         my ($difftree, $hash, @parents) = @_;
4475         my ($parent) = $parents[0];
4476         my $have_blame = gitweb_check_feature('blame');
4477         print "<div class=\"list_head\">\n";
4478         if ($#{$difftree} > 10) {
4479                 print(($#{$difftree} + 1) . " files changed:\n");
4480         }
4481         print "</div>\n";
4482
4483         print "<table class=\"" .
4484               (@parents > 1 ? "combined " : "") .
4485               "diff_tree\">\n";
4486
4487         # header only for combined diff in 'commitdiff' view
4488         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4489         if ($has_header) {
4490                 # table header
4491                 print "<thead><tr>\n" .
4492                        "<th></th><th></th>\n"; # filename, patchN link
4493                 for (my $i = 0; $i < @parents; $i++) {
4494                         my $par = $parents[$i];
4495                         print "<th>" .
4496                               $cgi->a({-href => href(action=>"commitdiff",
4497                                                      hash=>$hash, hash_parent=>$par),
4498                                        -title => 'commitdiff to parent number ' .
4499                                                   ($i+1) . ': ' . substr($par,0,7)},
4500                                       $i+1) .
4501                               "&nbsp;</th>\n";
4502                 }
4503                 print "</tr></thead>\n<tbody>\n";
4504         }
4505
4506         my $alternate = 1;
4507         my $patchno = 0;
4508         foreach my $line (@{$difftree}) {
4509                 my $diff = parsed_difftree_line($line);
4510
4511                 if ($alternate) {
4512                         print "<tr class=\"dark\">\n";
4513                 } else {
4514                         print "<tr class=\"light\">\n";
4515                 }
4516                 $alternate ^= 1;
4517
4518                 if (exists $diff->{'nparents'}) { # combined diff
4519
4520                         fill_from_file_info($diff, @parents)
4521                                 unless exists $diff->{'from_file'};
4522
4523                         if (!is_deleted($diff)) {
4524                                 # file exists in the result (child) commit
4525                                 print "<td>" .
4526                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4527                                                              file_name=>$diff->{'to_file'},
4528                                                              hash_base=>$hash),
4529                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4530                                       "</td>\n";
4531                         } else {
4532                                 print "<td>" .
4533                                       esc_path($diff->{'to_file'}) .
4534                                       "</td>\n";
4535                         }
4536
4537                         if ($action eq 'commitdiff') {
4538                                 # link to patch
4539                                 $patchno++;
4540                                 print "<td class=\"link\">" .
4541                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4542                                       " | " .
4543                                       "</td>\n";
4544                         }
4545
4546                         my $has_history = 0;
4547                         my $not_deleted = 0;
4548                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4549                                 my $hash_parent = $parents[$i];
4550                                 my $from_hash = $diff->{'from_id'}[$i];
4551                                 my $from_path = $diff->{'from_file'}[$i];
4552                                 my $status = $diff->{'status'}[$i];
4553
4554                                 $has_history ||= ($status ne 'A');
4555                                 $not_deleted ||= ($status ne 'D');
4556
4557                                 if ($status eq 'A') {
4558                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4559                                 } elsif ($status eq 'D') {
4560                                         print "<td class=\"link\">" .
4561                                               $cgi->a({-href => href(action=>"blob",
4562                                                                      hash_base=>$hash,
4563                                                                      hash=>$from_hash,
4564                                                                      file_name=>$from_path)},
4565                                                       "blob" . ($i+1)) .
4566                                               " | </td>\n";
4567                                 } else {
4568                                         if ($diff->{'to_id'} eq $from_hash) {
4569                                                 print "<td class=\"link nochange\">";
4570                                         } else {
4571                                                 print "<td class=\"link\">";
4572                                         }
4573                                         print $cgi->a({-href => href(action=>"blobdiff",
4574                                                                      hash=>$diff->{'to_id'},
4575                                                                      hash_parent=>$from_hash,
4576                                                                      hash_base=>$hash,
4577                                                                      hash_parent_base=>$hash_parent,
4578                                                                      file_name=>$diff->{'to_file'},
4579                                                                      file_parent=>$from_path)},
4580                                                       "diff" . ($i+1)) .
4581                                               " | </td>\n";
4582                                 }
4583                         }
4584
4585                         print "<td class=\"link\">";
4586                         if ($not_deleted) {
4587                                 print $cgi->a({-href => href(action=>"blob",
4588                                                              hash=>$diff->{'to_id'},
4589                                                              file_name=>$diff->{'to_file'},
4590                                                              hash_base=>$hash)},
4591                                               "blob");
4592                                 print " | " if ($has_history);
4593                         }
4594                         if ($has_history) {
4595                                 print $cgi->a({-href => href(action=>"history",
4596                                                              file_name=>$diff->{'to_file'},
4597                                                              hash_base=>$hash)},
4598                                               "history");
4599                         }
4600                         print "</td>\n";
4601
4602                         print "</tr>\n";
4603                         next; # instead of 'else' clause, to avoid extra indent
4604                 }
4605                 # else ordinary diff
4606
4607                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4608                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4609                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4610                         $to_mode_oct = oct $diff->{'to_mode'};
4611                         if (S_ISREG($to_mode_oct)) { # only for regular file
4612                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4613                         }
4614                         $to_file_type = file_type($diff->{'to_mode'});
4615                 }
4616                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4617                         $from_mode_oct = oct $diff->{'from_mode'};
4618                         if (S_ISREG($to_mode_oct)) { # only for regular file
4619                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4620                         }
4621                         $from_file_type = file_type($diff->{'from_mode'});
4622                 }
4623
4624                 if ($diff->{'status'} eq "A") { # created
4625                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4626                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4627                         $mode_chng   .= "]</span>";
4628                         print "<td>";
4629                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4630                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4631                                       -class => "list"}, esc_path($diff->{'file'}));
4632                         print "</td>\n";
4633                         print "<td>$mode_chng</td>\n";
4634                         print "<td class=\"link\">";
4635                         if ($action eq 'commitdiff') {
4636                                 # link to patch
4637                                 $patchno++;
4638                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4639                                 print " | ";
4640                         }
4641                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4642                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4643                                       "blob");
4644                         print "</td>\n";
4645
4646                 } elsif ($diff->{'status'} eq "D") { # deleted
4647                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4648                         print "<td>";
4649                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4650                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4651                                        -class => "list"}, esc_path($diff->{'file'}));
4652                         print "</td>\n";
4653                         print "<td>$mode_chng</td>\n";
4654                         print "<td class=\"link\">";
4655                         if ($action eq 'commitdiff') {
4656                                 # link to patch
4657                                 $patchno++;
4658                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4659                                 print " | ";
4660                         }
4661                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4662                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4663                                       "blob") . " | ";
4664                         if ($have_blame) {
4665                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4666                                                              file_name=>$diff->{'file'})},
4667                                               "blame") . " | ";
4668                         }
4669                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4670                                                      file_name=>$diff->{'file'})},
4671                                       "history");
4672                         print "</td>\n";
4673
4674                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4675                         my $mode_chnge = "";
4676                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4677                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4678                                 if ($from_file_type ne $to_file_type) {
4679                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4680                                 }
4681                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4682                                         if ($from_mode_str && $to_mode_str) {
4683                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4684                                         } elsif ($to_mode_str) {
4685                                                 $mode_chnge .= " mode: $to_mode_str";
4686                                         }
4687                                 }
4688                                 $mode_chnge .= "]</span>\n";
4689                         }
4690                         print "<td>";
4691                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4692                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4693                                       -class => "list"}, esc_path($diff->{'file'}));
4694                         print "</td>\n";
4695                         print "<td>$mode_chnge</td>\n";
4696                         print "<td class=\"link\">";
4697                         if ($action eq 'commitdiff') {
4698                                 # link to patch
4699                                 $patchno++;
4700                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4701                                       " | ";
4702                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4703                                 # "commit" view and modified file (not onlu mode changed)
4704                                 print $cgi->a({-href => href(action=>"blobdiff",
4705                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4706                                                              hash_base=>$hash, hash_parent_base=>$parent,
4707                                                              file_name=>$diff->{'file'})},
4708                                               "diff") .
4709                                       " | ";
4710                         }
4711                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4712                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4713                                        "blob") . " | ";
4714                         if ($have_blame) {
4715                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4716                                                              file_name=>$diff->{'file'})},
4717                                               "blame") . " | ";
4718                         }
4719                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4720                                                      file_name=>$diff->{'file'})},
4721                                       "history");
4722                         print "</td>\n";
4723
4724                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4725                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4726                         my $nstatus = $status_name{$diff->{'status'}};
4727                         my $mode_chng = "";
4728                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4729                                 # mode also for directories, so we cannot use $to_mode_str
4730                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4731                         }
4732                         print "<td>" .
4733                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4734                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4735                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4736                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4737                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4738                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4739                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4740                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4741                               "<td class=\"link\">";
4742                         if ($action eq 'commitdiff') {
4743                                 # link to patch
4744                                 $patchno++;
4745                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4746                                       " | ";
4747                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4748                                 # "commit" view and modified file (not only pure rename or copy)
4749                                 print $cgi->a({-href => href(action=>"blobdiff",
4750                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4751                                                              hash_base=>$hash, hash_parent_base=>$parent,
4752                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4753                                               "diff") .
4754                                       " | ";
4755                         }
4756                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4757                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4758                                       "blob") . " | ";
4759                         if ($have_blame) {
4760                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4761                                                              file_name=>$diff->{'to_file'})},
4762                                               "blame") . " | ";
4763                         }
4764                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4765                                                     file_name=>$diff->{'to_file'})},
4766                                       "history");
4767                         print "</td>\n";
4768
4769                 } # we should not encounter Unmerged (U) or Unknown (X) status
4770                 print "</tr>\n";
4771         }
4772         print "</tbody>" if $has_header;
4773         print "</table>\n";
4774 }
4775
4776 sub git_patchset_body {
4777         my ($fd, $difftree, $hash, @hash_parents) = @_;
4778         my ($hash_parent) = $hash_parents[0];
4779
4780         my $is_combined = (@hash_parents > 1);
4781         my $patch_idx = 0;
4782         my $patch_number = 0;
4783         my $patch_line;
4784         my $diffinfo;
4785         my $to_name;
4786         my (%from, %to);
4787
4788         print "<div class=\"patchset\">\n";
4789
4790         # skip to first patch
4791         while ($patch_line = <$fd>) {
4792                 chomp $patch_line;
4793
4794                 last if ($patch_line =~ m/^diff /);
4795         }
4796
4797  PATCH:
4798         while ($patch_line) {
4799
4800                 # parse "git diff" header line
4801                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4802                         # $1 is from_name, which we do not use
4803                         $to_name = unquote($2);
4804                         $to_name =~ s!^b/!!;
4805                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4806                         # $1 is 'cc' or 'combined', which we do not use
4807                         $to_name = unquote($2);
4808                 } else {
4809                         $to_name = undef;
4810                 }
4811
4812                 # check if current patch belong to current raw line
4813                 # and parse raw git-diff line if needed
4814                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4815                         # this is continuation of a split patch
4816                         print "<div class=\"patch cont\">\n";
4817                 } else {
4818                         # advance raw git-diff output if needed
4819                         $patch_idx++ if defined $diffinfo;
4820
4821                         # read and prepare patch information
4822                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4823
4824                         # compact combined diff output can have some patches skipped
4825                         # find which patch (using pathname of result) we are at now;
4826                         if ($is_combined) {
4827                                 while ($to_name ne $diffinfo->{'to_file'}) {
4828                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4829                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4830                                               "</div>\n";  # class="patch"
4831
4832                                         $patch_idx++;
4833                                         $patch_number++;
4834
4835                                         last if $patch_idx > $#$difftree;
4836                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4837                                 }
4838                         }
4839
4840                         # modifies %from, %to hashes
4841                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4842
4843                         # this is first patch for raw difftree line with $patch_idx index
4844                         # we index @$difftree array from 0, but number patches from 1
4845                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4846                 }
4847
4848                 # git diff header
4849                 #assert($patch_line =~ m/^diff /) if DEBUG;
4850                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4851                 $patch_number++;
4852                 # print "git diff" header
4853                 print format_git_diff_header_line($patch_line, $diffinfo,
4854                                                   \%from, \%to);
4855
4856                 # print extended diff header
4857                 print "<div class=\"diff extended_header\">\n";
4858         EXTENDED_HEADER:
4859                 while ($patch_line = <$fd>) {
4860                         chomp $patch_line;
4861
4862                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4863
4864                         print format_extended_diff_header_line($patch_line, $diffinfo,
4865                                                                \%from, \%to);
4866                 }
4867                 print "</div>\n"; # class="diff extended_header"
4868
4869                 # from-file/to-file diff header
4870                 if (! $patch_line) {
4871                         print "</div>\n"; # class="patch"
4872                         last PATCH;
4873                 }
4874                 next PATCH if ($patch_line =~ m/^diff /);
4875                 #assert($patch_line =~ m/^---/) if DEBUG;
4876
4877                 my $last_patch_line = $patch_line;
4878                 $patch_line = <$fd>;
4879                 chomp $patch_line;
4880                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4881
4882                 print format_diff_from_to_header($last_patch_line, $patch_line,
4883                                                  $diffinfo, \%from, \%to,
4884                                                  @hash_parents);
4885
4886                 # the patch itself
4887         LINE:
4888                 while ($patch_line = <$fd>) {
4889                         chomp $patch_line;
4890
4891                         next PATCH if ($patch_line =~ m/^diff /);
4892
4893                         print format_diff_line($patch_line, \%from, \%to);
4894                 }
4895
4896         } continue {
4897                 print "</div>\n"; # class="patch"
4898         }
4899
4900         # for compact combined (--cc) format, with chunk and patch simplification
4901         # the patchset might be empty, but there might be unprocessed raw lines
4902         for (++$patch_idx if $patch_number > 0;
4903              $patch_idx < @$difftree;
4904              ++$patch_idx) {
4905                 # read and prepare patch information
4906                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4907
4908                 # generate anchor for "patch" links in difftree / whatchanged part
4909                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4910                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4911                       "</div>\n";  # class="patch"
4912
4913                 $patch_number++;
4914         }
4915
4916         if ($patch_number == 0) {
4917                 if (@hash_parents > 1) {
4918                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4919                 } else {
4920                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4921                 }
4922         }
4923
4924         print "</div>\n"; # class="patchset"
4925 }
4926
4927 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4928
4929 # fills project list info (age, description, owner, forks) for each
4930 # project in the list, removing invalid projects from returned list
4931 # NOTE: modifies $projlist, but does not remove entries from it
4932 sub fill_project_list_info {
4933         my ($projlist, $check_forks) = @_;
4934         my @projects;
4935
4936         my $show_ctags = gitweb_check_feature('ctags');
4937  PROJECT:
4938         foreach my $pr (@$projlist) {
4939                 my (@activity) = git_get_last_activity($pr->{'path'});
4940                 unless (@activity) {
4941                         next PROJECT;
4942                 }
4943                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4944                 if (!defined $pr->{'descr'}) {
4945                         my $descr = git_get_project_description($pr->{'path'}) || "";
4946                         $descr = to_utf8($descr);
4947                         $pr->{'descr_long'} = $descr;
4948                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4949                 }
4950                 if (!defined $pr->{'owner'}) {
4951                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4952                 }
4953                 if ($check_forks) {
4954                         my $pname = $pr->{'path'};
4955                         if (($pname =~ s/\.git$//) &&
4956                             ($pname !~ /\/$/) &&
4957                             (-d "$projectroot/$pname")) {
4958                                 $pr->{'forks'} = "-d $projectroot/$pname";
4959                         } else {
4960                                 $pr->{'forks'} = 0;
4961                         }
4962                 }
4963                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4964                 push @projects, $pr;
4965         }
4966
4967         return @projects;
4968 }
4969
4970 # print 'sort by' <th> element, generating 'sort by $name' replay link
4971 # if that order is not selected
4972 sub print_sort_th {
4973         print format_sort_th(@_);
4974 }
4975
4976 sub format_sort_th {
4977         my ($name, $order, $header) = @_;
4978         my $sort_th = "";
4979         $header ||= ucfirst($name);
4980
4981         if ($order eq $name) {
4982                 $sort_th .= "<th>$header</th>\n";
4983         } else {
4984                 $sort_th .= "<th>" .
4985                             $cgi->a({-href => href(-replay=>1, order=>$name),
4986                                      -class => "header"}, $header) .
4987                             "</th>\n";
4988         }
4989
4990         return $sort_th;
4991 }
4992
4993 sub git_project_list_body {
4994         # actually uses global variable $project
4995         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4996
4997         my $check_forks = gitweb_check_feature('forks');
4998         my @projects = fill_project_list_info($projlist, $check_forks);
4999
5000         $order ||= $default_projects_order;
5001         $from = 0 unless defined $from;
5002         $to = $#projects if (!defined $to || $#projects < $to);
5003
5004         my %order_info = (
5005                 project => { key => 'path', type => 'str' },
5006                 descr => { key => 'descr_long', type => 'str' },
5007                 owner => { key => 'owner', type => 'str' },
5008                 age => { key => 'age', type => 'num' }
5009         );
5010         my $oi = $order_info{$order};
5011         if ($oi->{'type'} eq 'str') {
5012                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
5013         } else {
5014                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
5015         }
5016
5017         my $show_ctags = gitweb_check_feature('ctags');
5018         if ($show_ctags) {
5019                 my %ctags;
5020                 foreach my $p (@projects) {
5021                         foreach my $ct (keys %{$p->{'ctags'}}) {
5022                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
5023                         }
5024                 }
5025                 my $cloud = git_populate_project_tagcloud(\%ctags);
5026                 print git_show_project_tagcloud($cloud, 64);
5027         }
5028
5029         print "<table class=\"project_list\">\n";
5030         unless ($no_header) {
5031                 print "<tr>\n";
5032                 if ($check_forks) {
5033                         print "<th></th>\n";
5034                 }
5035                 print_sort_th('project', $order, 'Project');
5036                 print_sort_th('descr', $order, 'Description');
5037                 print_sort_th('owner', $order, 'Owner');
5038                 print_sort_th('age', $order, 'Last Change');
5039                 print "<th></th>\n" . # for links
5040                       "</tr>\n";
5041         }
5042         my $alternate = 1;
5043         my $tagfilter = $cgi->param('by_tag');
5044         for (my $i = $from; $i <= $to; $i++) {
5045                 my $pr = $projects[$i];
5046
5047                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
5048                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
5049                         and not $pr->{'descr_long'} =~ /$searchtext/;
5050                 # Weed out forks or non-matching entries of search
5051                 if ($check_forks) {
5052                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
5053                         $forkbase="^$forkbase" if $forkbase;
5054                         next if not $searchtext and not $tagfilter and $show_ctags
5055                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
5056                 }
5057
5058                 if ($alternate) {
5059                         print "<tr class=\"dark\">\n";
5060                 } else {
5061                         print "<tr class=\"light\">\n";
5062                 }
5063                 $alternate ^= 1;
5064                 if ($check_forks) {
5065                         print "<td>";
5066                         if ($pr->{'forks'}) {
5067                                 print "<!-- $pr->{'forks'} -->\n";
5068                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
5069                         }
5070                         print "</td>\n";
5071                 }
5072                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5073                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5074                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5075                                         -class => "list", -title => $pr->{'descr_long'}},
5076                                         esc_html($pr->{'descr'})) . "</td>\n" .
5077                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5078                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5079                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5080                       "<td class=\"link\">" .
5081                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5082                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5083                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5084                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5085                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5086                       "</td>\n" .
5087                       "</tr>\n";
5088         }
5089         if (defined $extra) {
5090                 print "<tr>\n";
5091                 if ($check_forks) {
5092                         print "<td></td>\n";
5093                 }
5094                 print "<td colspan=\"5\">$extra</td>\n" .
5095                       "</tr>\n";
5096         }
5097         print "</table>\n";
5098 }
5099
5100 sub git_log_body {
5101         # uses global variable $project
5102         my ($commitlist, $from, $to, $refs, $extra) = @_;
5103
5104         $from = 0 unless defined $from;
5105         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5106
5107         for (my $i = 0; $i <= $to; $i++) {
5108                 my %co = %{$commitlist->[$i]};
5109                 next if !%co;
5110                 my $commit = $co{'id'};
5111                 my $ref = format_ref_marker($refs, $commit);
5112                 my %ad = parse_date($co{'author_epoch'});
5113                 git_print_header_div('commit',
5114                                "<span class=\"age\">$co{'age_string'}</span>" .
5115                                esc_html($co{'title'}) . $ref,
5116                                $commit);
5117                 print "<div class=\"title_text\">\n" .
5118                       "<div class=\"log_link\">\n" .
5119                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5120                       " | " .
5121                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5122                       " | " .
5123                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5124                       "<br/>\n" .
5125                       "</div>\n";
5126                       git_print_authorship(\%co, -tag => 'span');
5127                       print "<br/>\n</div>\n";
5128
5129                 print "<div class=\"log_body\">\n";
5130                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5131                 print "</div>\n";
5132         }
5133         if ($extra) {
5134                 print "<div class=\"page_nav\">\n";
5135                 print "$extra\n";
5136                 print "</div>\n";
5137         }
5138 }
5139
5140 sub git_shortlog_body {
5141         # uses global variable $project
5142         my ($commitlist, $from, $to, $refs, $extra) = @_;
5143
5144         $from = 0 unless defined $from;
5145         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5146
5147         print "<table class=\"shortlog\">\n";
5148         my $alternate = 1;
5149         for (my $i = $from; $i <= $to; $i++) {
5150                 my %co = %{$commitlist->[$i]};
5151                 my $commit = $co{'id'};
5152                 my $ref = format_ref_marker($refs, $commit);
5153                 if ($alternate) {
5154                         print "<tr class=\"dark\">\n";
5155                 } else {
5156                         print "<tr class=\"light\">\n";
5157                 }
5158                 $alternate ^= 1;
5159                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5160                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5161                       format_author_html('td', \%co, 10) . "<td>";
5162                 print format_subject_html($co{'title'}, $co{'title_short'},
5163                                           href(action=>"commit", hash=>$commit), $ref);
5164                 print "</td>\n" .
5165                       "<td class=\"link\">" .
5166                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5167                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5168                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5169                 my $snapshot_links = format_snapshot_links($commit);
5170                 if (defined $snapshot_links) {
5171                         print " | " . $snapshot_links;
5172                 }
5173                 print "</td>\n" .
5174                       "</tr>\n";
5175         }
5176         if (defined $extra) {
5177                 print "<tr>\n" .
5178                       "<td colspan=\"4\">$extra</td>\n" .
5179                       "</tr>\n";
5180         }
5181         print "</table>\n";
5182 }
5183
5184 sub git_history_body {
5185         # Warning: assumes constant type (blob or tree) during history
5186         my ($commitlist, $from, $to, $refs, $extra,
5187             $file_name, $file_hash, $ftype) = @_;
5188
5189         $from = 0 unless defined $from;
5190         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5191
5192         print "<table class=\"history\">\n";
5193         my $alternate = 1;
5194         for (my $i = $from; $i <= $to; $i++) {
5195                 my %co = %{$commitlist->[$i]};
5196                 if (!%co) {
5197                         next;
5198                 }
5199                 my $commit = $co{'id'};
5200
5201                 my $ref = format_ref_marker($refs, $commit);
5202
5203                 if ($alternate) {
5204                         print "<tr class=\"dark\">\n";
5205                 } else {
5206                         print "<tr class=\"light\">\n";
5207                 }
5208                 $alternate ^= 1;
5209                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5210         # shortlog:   format_author_html('td', \%co, 10)
5211                       format_author_html('td', \%co, 15, 3) . "<td>";
5212                 # originally git_history used chop_str($co{'title'}, 50)
5213                 print format_subject_html($co{'title'}, $co{'title_short'},
5214                                           href(action=>"commit", hash=>$commit), $ref);
5215                 print "</td>\n" .
5216                       "<td class=\"link\">" .
5217                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5218                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5219
5220                 if ($ftype eq 'blob') {
5221                         my $blob_current = $file_hash;
5222                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5223                         if (defined $blob_current && defined $blob_parent &&
5224                                         $blob_current ne $blob_parent) {
5225                                 print " | " .
5226                                         $cgi->a({-href => href(action=>"blobdiff",
5227                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5228                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5229                                                                file_name=>$file_name)},
5230                                                 "diff to current");
5231                         }
5232                 }
5233                 print "</td>\n" .
5234                       "</tr>\n";
5235         }
5236         if (defined $extra) {
5237                 print "<tr>\n" .
5238                       "<td colspan=\"4\">$extra</td>\n" .
5239                       "</tr>\n";
5240         }
5241         print "</table>\n";
5242 }
5243
5244 sub git_tags_body {
5245         # uses global variable $project
5246         my ($taglist, $from, $to, $extra) = @_;
5247         $from = 0 unless defined $from;
5248         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5249
5250         print "<table class=\"tags\">\n";
5251         my $alternate = 1;
5252         for (my $i = $from; $i <= $to; $i++) {
5253                 my $entry = $taglist->[$i];
5254                 my %tag = %$entry;
5255                 my $comment = $tag{'subject'};
5256                 my $comment_short;
5257                 if (defined $comment) {
5258                         $comment_short = chop_str($comment, 30, 5);
5259                 }
5260                 if ($alternate) {
5261                         print "<tr class=\"dark\">\n";
5262                 } else {
5263                         print "<tr class=\"light\">\n";
5264                 }
5265                 $alternate ^= 1;
5266                 if (defined $tag{'age'}) {
5267                         print "<td><i>$tag{'age'}</i></td>\n";
5268                 } else {
5269                         print "<td></td>\n";
5270                 }
5271                 print "<td>" .
5272                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5273                                -class => "list name"}, esc_html($tag{'name'})) .
5274                       "</td>\n" .
5275                       "<td>";
5276                 if (defined $comment) {
5277                         print format_subject_html($comment, $comment_short,
5278                                                   href(action=>"tag", hash=>$tag{'id'}));
5279                 }
5280                 print "</td>\n" .
5281                       "<td class=\"selflink\">";
5282                 if ($tag{'type'} eq "tag") {
5283                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5284                 } else {
5285                         print "&nbsp;";
5286                 }
5287                 print "</td>\n" .
5288                       "<td class=\"link\">" . " | " .
5289                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5290                 if ($tag{'reftype'} eq "commit") {
5291                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5292                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5293                 } elsif ($tag{'reftype'} eq "blob") {
5294                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5295                 }
5296                 print "</td>\n" .
5297                       "</tr>";
5298         }
5299         if (defined $extra) {
5300                 print "<tr>\n" .
5301                       "<td colspan=\"5\">$extra</td>\n" .
5302                       "</tr>\n";
5303         }
5304         print "</table>\n";
5305 }
5306
5307 sub git_heads_body {
5308         # uses global variable $project
5309         my ($headlist, $head, $from, $to, $extra) = @_;
5310         $from = 0 unless defined $from;
5311         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5312
5313         print "<table class=\"heads\">\n";
5314         my $alternate = 1;
5315         for (my $i = $from; $i <= $to; $i++) {
5316                 my $entry = $headlist->[$i];
5317                 my %ref = %$entry;
5318                 my $curr = $ref{'id'} eq $head;
5319                 if ($alternate) {
5320                         print "<tr class=\"dark\">\n";
5321                 } else {
5322                         print "<tr class=\"light\">\n";
5323                 }
5324                 $alternate ^= 1;
5325                 print "<td><i>$ref{'age'}</i></td>\n" .
5326                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5327                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5328                                -class => "list name"},esc_html($ref{'name'})) .
5329                       "</td>\n" .
5330                       "<td class=\"link\">" .
5331                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5332                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5333                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
5334                       "</td>\n" .
5335                       "</tr>";
5336         }
5337         if (defined $extra) {
5338                 print "<tr>\n" .
5339                       "<td colspan=\"3\">$extra</td>\n" .
5340                       "</tr>\n";
5341         }
5342         print "</table>\n";
5343 }
5344
5345 sub git_search_grep_body {
5346         my ($commitlist, $from, $to, $extra) = @_;
5347         $from = 0 unless defined $from;
5348         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5349
5350         print "<table class=\"commit_search\">\n";
5351         my $alternate = 1;
5352         for (my $i = $from; $i <= $to; $i++) {
5353                 my %co = %{$commitlist->[$i]};
5354                 if (!%co) {
5355                         next;
5356                 }
5357                 my $commit = $co{'id'};
5358                 if ($alternate) {
5359                         print "<tr class=\"dark\">\n";
5360                 } else {
5361                         print "<tr class=\"light\">\n";
5362                 }
5363                 $alternate ^= 1;
5364                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5365                       format_author_html('td', \%co, 15, 5) .
5366                       "<td>" .
5367                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5368                                -class => "list subject"},
5369                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5370                 my $comment = $co{'comment'};
5371                 foreach my $line (@$comment) {
5372                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5373                                 my ($lead, $match, $trail) = ($1, $2, $3);
5374                                 $match = chop_str($match, 70, 5, 'center');
5375                                 my $contextlen = int((80 - length($match))/2);
5376                                 $contextlen = 30 if ($contextlen > 30);
5377                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5378                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5379
5380                                 $lead  = esc_html($lead);
5381                                 $match = esc_html($match);
5382                                 $trail = esc_html($trail);
5383
5384                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5385                         }
5386                 }
5387                 print "</td>\n" .
5388                       "<td class=\"link\">" .
5389                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5390                       " | " .
5391                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5392                       " | " .
5393                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5394                 print "</td>\n" .
5395                       "</tr>\n";
5396         }
5397         if (defined $extra) {
5398                 print "<tr>\n" .
5399                       "<td colspan=\"3\">$extra</td>\n" .
5400                       "</tr>\n";
5401         }
5402         print "</table>\n";
5403 }
5404
5405 ## ======================================================================
5406 ## ======================================================================
5407 ## actions
5408
5409 sub git_project_list {
5410         my $order = $input_params{'order'};
5411         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5412                 die_error(400, "Unknown order parameter");
5413         }
5414
5415         my @list = git_get_projects_list();
5416         if (!@list) {
5417                 die_error(404, "No projects found");
5418         }
5419
5420         git_header_html();
5421         if (defined $home_text && -f $home_text) {
5422                 print "<div class=\"index_include\">\n";
5423                 insert_file($home_text);
5424                 print "</div>\n";
5425         }
5426         print $cgi->startform(-method => "get") .
5427               "<p class=\"projsearch\">Search:\n" .
5428               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5429               "</p>" .
5430               $cgi->end_form() . "\n";
5431         git_project_list_body(\@list, $order);
5432         git_footer_html();
5433 }
5434
5435 sub git_forks {
5436         my $order = $input_params{'order'};
5437         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5438                 die_error(400, "Unknown order parameter");
5439         }
5440
5441         my @list = git_get_projects_list($project);
5442         if (!@list) {
5443                 die_error(404, "No forks found");
5444         }
5445
5446         git_header_html();
5447         git_print_page_nav('','');
5448         git_print_header_div('summary', "$project forks");
5449         git_project_list_body(\@list, $order);
5450         git_footer_html();
5451 }
5452
5453 sub git_project_index {
5454         my @projects = git_get_projects_list($project);
5455
5456         print $cgi->header(
5457                 -type => 'text/plain',
5458                 -charset => 'utf-8',
5459                 -content_disposition => 'inline; filename="index.aux"');
5460
5461         foreach my $pr (@projects) {
5462                 if (!exists $pr->{'owner'}) {
5463                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5464                 }
5465
5466                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5467                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5468                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5469                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5470                 $path  =~ s/ /\+/g;
5471                 $owner =~ s/ /\+/g;
5472
5473                 print "$path $owner\n";
5474         }
5475 }
5476
5477 sub git_summary {
5478         my $descr = git_get_project_description($project) || "none";
5479         my %co = parse_commit("HEAD");
5480         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5481         my $head = $co{'id'};
5482
5483         my $owner = git_get_project_owner($project);
5484
5485         my $refs = git_get_references();
5486         # These get_*_list functions return one more to allow us to see if
5487         # there are more ...
5488         my @taglist  = git_get_tags_list(16);
5489         my @headlist = git_get_heads_list(16);
5490         my @forklist;
5491         my $check_forks = gitweb_check_feature('forks');
5492
5493         if ($check_forks) {
5494                 @forklist = git_get_projects_list($project);
5495         }
5496
5497         git_header_html();
5498         git_print_page_nav('summary','', $head);
5499
5500         print "<div class=\"title\">&nbsp;</div>\n";
5501         print "<table class=\"projects_list\">\n" .
5502               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5503               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5504         if (defined $cd{'rfc2822'}) {
5505                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5506         }
5507
5508         # use per project git URL list in $projectroot/$project/cloneurl
5509         # or make project git URL from git base URL and project name
5510         my $url_tag = "URL";
5511         my @url_list = git_get_project_url_list($project);
5512         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5513         foreach my $git_url (@url_list) {
5514                 next unless $git_url;
5515                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5516                 $url_tag = "";
5517         }
5518
5519         # Tag cloud
5520         my $show_ctags = gitweb_check_feature('ctags');
5521         if ($show_ctags) {
5522                 my $ctags = git_get_project_ctags($project);
5523                 my $cloud = git_populate_project_tagcloud($ctags);
5524                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5525                 print "</td>\n<td>" unless %$ctags;
5526                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5527                 print "</td>\n<td>" if %$ctags;
5528                 print git_show_project_tagcloud($cloud, 48);
5529                 print "</td></tr>";
5530         }
5531
5532         print "</table>\n";
5533
5534         # If XSS prevention is on, we don't include README.html.
5535         # TODO: Allow a readme in some safe format.
5536         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5537                 print "<div class=\"title\">readme</div>\n" .
5538                       "<div class=\"readme\">\n";
5539                 insert_file("$projectroot/$project/README.html");
5540                 print "\n</div>\n"; # class="readme"
5541         }
5542
5543         # we need to request one more than 16 (0..15) to check if
5544         # those 16 are all
5545         my @commitlist = $head ? parse_commits($head, 17) : ();
5546         if (@commitlist) {
5547                 git_print_header_div('shortlog');
5548                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5549                                   $#commitlist <=  15 ? undef :
5550                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5551         }
5552
5553         if (@taglist) {
5554                 git_print_header_div('tags');
5555                 git_tags_body(\@taglist, 0, 15,
5556                               $#taglist <=  15 ? undef :
5557                               $cgi->a({-href => href(action=>"tags")}, "..."));
5558         }
5559
5560         if (@headlist) {
5561                 git_print_header_div('heads');
5562                 git_heads_body(\@headlist, $head, 0, 15,
5563                                $#headlist <= 15 ? undef :
5564                                $cgi->a({-href => href(action=>"heads")}, "..."));
5565         }
5566
5567         if (@forklist) {
5568                 git_print_header_div('forks');
5569                 git_project_list_body(\@forklist, 'age', 0, 15,
5570                                       $#forklist <= 15 ? undef :
5571                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5572                                       'no_header');
5573         }
5574
5575         git_footer_html();
5576 }
5577
5578 sub git_tag {
5579         my %tag = parse_tag($hash);
5580
5581         if (! %tag) {
5582                 die_error(404, "Unknown tag object");
5583         }
5584
5585         my $head = git_get_head_hash($project);
5586         git_header_html();
5587         git_print_page_nav('','', $head,undef,$head);
5588         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5589         print "<div class=\"title_text\">\n" .
5590               "<table class=\"object_header\">\n" .
5591               "<tr>\n" .
5592               "<td>object</td>\n" .
5593               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5594                                $tag{'object'}) . "</td>\n" .
5595               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5596                                               $tag{'type'}) . "</td>\n" .
5597               "</tr>\n";
5598         if (defined($tag{'author'})) {
5599                 git_print_authorship_rows(\%tag, 'author');
5600         }
5601         print "</table>\n\n" .
5602               "</div>\n";
5603         print "<div class=\"page_body\">";
5604         my $comment = $tag{'comment'};
5605         foreach my $line (@$comment) {
5606                 chomp $line;
5607                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5608         }
5609         print "</div>\n";
5610         git_footer_html();
5611 }
5612
5613 sub git_blame_common {
5614         my $format = shift || 'porcelain';
5615         if ($format eq 'porcelain' && $cgi->param('js') &&
5616             !$caching_enabled) {
5617                 $format = 'incremental';
5618                 $action = 'blame_incremental'; # for page title etc
5619         }
5620
5621         # permissions
5622         gitweb_check_feature('blame')
5623                 or die_error(403, "Blame view not allowed");
5624
5625         # error checking
5626         die_error(400, "No file name given") unless $file_name;
5627         $hash_base ||= git_get_head_hash($project);
5628         die_error(404, "Couldn't find base commit") unless $hash_base;
5629         my %co = parse_commit($hash_base)
5630                 or die_error(404, "Commit not found");
5631         my $ftype = "blob";
5632         if (!defined $hash) {
5633                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5634                         or die_error(404, "Error looking up file");
5635         } else {
5636                 $ftype = git_get_type($hash);
5637                 if ($ftype !~ "blob") {
5638                         die_error(400, "Object is not a blob");
5639                 }
5640         }
5641
5642         my $fd;
5643         if ($format eq 'incremental') {
5644                 # get file contents (as base)
5645                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5646                         or die_error(500, "Open git-cat-file failed");
5647         } elsif ($format eq 'data') {
5648                 # run git-blame --incremental
5649                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5650                         $hash_base, "--", $file_name
5651                         or die_error(500, "Open git-blame --incremental failed");
5652         } else {
5653                 # run git-blame --porcelain
5654                 open $fd, "-|", git_cmd(), "blame", '-p',
5655                         $hash_base, '--', $file_name
5656                         or die_error(500, "Open git-blame --porcelain failed");
5657         }
5658
5659         # incremental blame data returns early
5660         if ($format eq 'data') {
5661                 print $cgi->header(
5662                         -type=>"text/plain", -charset => "utf-8",
5663                         -status=> "200 OK");
5664                 local $| = 1; # output autoflush
5665                 print while <$fd>;
5666                 close $fd
5667                         or print "ERROR $!\n";
5668
5669                 print 'END';
5670                 if (!$caching_enabled &&
5671                     defined $t0 && gitweb_check_feature('timed')) {
5672                         print ' '.
5673                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5674                               ' '.$number_of_git_cmds;
5675                 }
5676                 print "\n";
5677
5678                 return;
5679         }
5680
5681         # page header
5682         git_header_html();
5683         my $formats_nav =
5684                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5685                         "blob") .
5686                 " | ";
5687         if ($format eq 'incremental') {
5688                 $formats_nav .=
5689                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5690                                 "blame") . " (non-incremental)";
5691         } elsif (!$caching_enabled) {
5692                 $formats_nav .=
5693                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5694                                 "blame") . " (incremental)";
5695         }
5696         $formats_nav .=
5697                 " | " .
5698                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5699                         "history") .
5700                 " | " .
5701                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5702                         "HEAD");
5703         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5704         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5705         git_print_page_path($file_name, $ftype, $hash_base);
5706
5707         # page body
5708         if ($format eq 'incremental') {
5709                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5710                       "This page requires JavaScript to run.\n Use ".
5711                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5712                               'this page').
5713                       " instead.\n".
5714                       "</b></center></div>\n</noscript>\n";
5715
5716                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5717         }
5718
5719         print qq!<div class="page_body">\n!;
5720         print qq!<div id="progress_info">... / ...</div>\n!
5721                 if ($format eq 'incremental');
5722         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5723               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5724               qq!<thead>\n!.
5725               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5726               qq!</thead>\n!.
5727               qq!<tbody>\n!;
5728
5729         my @rev_color = qw(light dark);
5730         my $num_colors = scalar(@rev_color);
5731         my $current_color = 0;
5732
5733         if ($format eq 'incremental') {
5734                 my $color_class = $rev_color[$current_color];
5735
5736                 #contents of a file
5737                 my $linenr = 0;
5738         LINE:
5739                 while (my $line = <$fd>) {
5740                         chomp $line;
5741                         $linenr++;
5742
5743                         print qq!<tr id="l$linenr" class="$color_class">!.
5744                               qq!<td class="sha1"><a href=""> </a></td>!.
5745                               qq!<td class="linenr">!.
5746                               qq!<a class="linenr" href="">$linenr</a></td>!;
5747                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5748                         print qq!</tr>\n!;
5749                 }
5750
5751         } else { # porcelain, i.e. ordinary blame
5752                 my %metainfo = (); # saves information about commits
5753
5754                 # blame data
5755         LINE:
5756                 while (my $line = <$fd>) {
5757                         chomp $line;
5758                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5759                         # no <lines in group> for subsequent lines in group of lines
5760                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5761                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5762                         if (!exists $metainfo{$full_rev}) {
5763                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5764                         }
5765                         my $meta = $metainfo{$full_rev};
5766                         my $data;
5767                         while ($data = <$fd>) {
5768                                 chomp $data;
5769                                 last if ($data =~ s/^\t//); # contents of line
5770                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5771                                         $meta->{$1} = $2 unless exists $meta->{$1};
5772                                 }
5773                                 if ($data =~ /^previous /) {
5774                                         $meta->{'nprevious'}++;
5775                                 }
5776                         }
5777                         my $short_rev = substr($full_rev, 0, 8);
5778                         my $author = $meta->{'author'};
5779                         my %date =
5780                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5781                         my $date = $date{'iso-tz'};
5782                         if ($group_size) {
5783                                 $current_color = ($current_color + 1) % $num_colors;
5784                         }
5785                         my $tr_class = $rev_color[$current_color];
5786                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5787                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5788                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5789                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5790                         if ($group_size) {
5791                                 print "<td class=\"sha1\"";
5792                                 print " title=\"". esc_html($author) . ", $date\"";
5793                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5794                                 print ">";
5795                                 print $cgi->a({-href => href(action=>"commit",
5796                                                              hash=>$full_rev,
5797                                                              file_name=>$file_name)},
5798                                               esc_html($short_rev));
5799                                 if ($group_size >= 2) {
5800                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5801                                         if (@author_initials) {
5802                                                 print "<br />" .
5803                                                       esc_html(join('', @author_initials));
5804                                                 #           or join('.', ...)
5805                                         }
5806                                 }
5807                                 print "</td>\n";
5808                         }
5809                         # 'previous' <sha1 of parent commit> <filename at commit>
5810                         if (exists $meta->{'previous'} &&
5811                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5812                                 $meta->{'parent'} = $1;
5813                                 $meta->{'file_parent'} = unquote($2);
5814                         }
5815                         my $linenr_commit =
5816                                 exists($meta->{'parent'}) ?
5817                                 $meta->{'parent'} : $full_rev;
5818                         my $linenr_filename =
5819                                 exists($meta->{'file_parent'}) ?
5820                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5821                         my $blamed = href(action => 'blame',
5822                                           file_name => $linenr_filename,
5823                                           hash_base => $linenr_commit);
5824                         print "<td class=\"linenr\">";
5825                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5826                                         -class => "linenr" },
5827                                       esc_html($lineno));
5828                         print "</td>";
5829                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5830                         print "</tr>\n";
5831                 } # end while
5832
5833         }
5834
5835         # footer
5836         print "</tbody>\n".
5837               "</table>\n"; # class="blame"
5838         print "</div>\n";   # class="blame_body"
5839         close $fd
5840                 or print "Reading blob failed\n";
5841
5842         git_footer_html();
5843 }
5844
5845 sub git_blame {
5846         git_blame_common();
5847 }
5848
5849 sub git_blame_incremental {
5850         git_blame_common(!$caching_enabled ? 'incremental' : undef);
5851 }
5852
5853 sub git_blame_data {
5854         git_blame_common('data');
5855 }
5856
5857 sub git_tags {
5858         my $head = git_get_head_hash($project);
5859         git_header_html();
5860         git_print_page_nav('','', $head,undef,$head);
5861         git_print_header_div('summary', $project);
5862
5863         my @tagslist = git_get_tags_list();
5864         if (@tagslist) {
5865                 git_tags_body(\@tagslist);
5866         }
5867         git_footer_html();
5868 }
5869
5870 sub git_heads {
5871         my $head = git_get_head_hash($project);
5872         git_header_html();
5873         git_print_page_nav('','', $head,undef,$head);
5874         git_print_header_div('summary', $project);
5875
5876         my @headslist = git_get_heads_list();
5877         if (@headslist) {
5878                 git_heads_body(\@headslist, $head);
5879         }
5880         git_footer_html();
5881 }
5882
5883 sub git_blob_plain {
5884         my $type = shift;
5885         my $expires;
5886
5887         if (!defined $hash) {
5888                 if (defined $file_name) {
5889                         my $base = $hash_base || git_get_head_hash($project);
5890                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5891                                 or die_error(404, "Cannot find file");
5892                 } else {
5893                         die_error(400, "No file name defined");
5894                 }
5895         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5896                 # blobs defined by non-textual hash id's can be cached
5897                 $expires = "+1d";
5898         }
5899
5900         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5901                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5902
5903         # content-type (can include charset)
5904         $type = blob_contenttype($fd, $file_name, $type);
5905
5906         # "save as" filename, even when no $file_name is given
5907         my $save_as = "$hash";
5908         if (defined $file_name) {
5909                 $save_as = $file_name;
5910         } elsif ($type =~ m/^text\//) {
5911                 $save_as .= '.txt';
5912         }
5913
5914         # With XSS prevention on, blobs of all types except a few known safe
5915         # ones are served with "Content-Disposition: attachment" to make sure
5916         # they don't run in our security domain.  For certain image types,
5917         # blob view writes an <img> tag referring to blob_plain view, and we
5918         # want to be sure not to break that by serving the image as an
5919         # attachment (though Firefox 3 doesn't seem to care).
5920         my $sandbox = $prevent_xss &&
5921                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5922
5923         print $cgi->header(
5924                 -type => $type,
5925                 -expires => $expires,
5926                 -content_disposition =>
5927                         ($sandbox ? 'attachment' : 'inline')
5928                         . '; filename="' . $save_as . '"');
5929         local $/ = undef;
5930         binmode STDOUT, ':raw';
5931         print <$fd>;
5932         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5933         close $fd;
5934 }
5935
5936 sub git_blob {
5937         my $expires;
5938
5939         if (!defined $hash) {
5940                 if (defined $file_name) {
5941                         my $base = $hash_base || git_get_head_hash($project);
5942                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5943                                 or die_error(404, "Cannot find file");
5944                 } else {
5945                         die_error(400, "No file name defined");
5946                 }
5947         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5948                 # blobs defined by non-textual hash id's can be cached
5949                 $expires = "+1d";
5950         }
5951
5952         my $have_blame = gitweb_check_feature('blame');
5953         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5954                 or die_error(500, "Couldn't cat $file_name, $hash");
5955         my $mimetype = blob_mimetype($fd, $file_name);
5956         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5957         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5958                 close $fd;
5959                 return git_blob_plain($mimetype);
5960         }
5961         # we can have blame only for text/* mimetype
5962         $have_blame &&= ($mimetype =~ m!^text/!);
5963
5964         my $highlight = gitweb_check_feature('highlight');
5965         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5966         $fd = run_highlighter($fd, $highlight, $syntax)
5967                 if $syntax;
5968
5969         git_header_html(undef, $expires);
5970         my $formats_nav = '';
5971         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5972                 if (defined $file_name) {
5973                         if ($have_blame) {
5974                                 $formats_nav .=
5975                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5976                                                 "blame") .
5977                                         " | ";
5978                         }
5979                         $formats_nav .=
5980                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5981                                         "history") .
5982                                 " | " .
5983                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5984                                         "raw") .
5985                                 " | " .
5986                                 $cgi->a({-href => href(action=>"blob",
5987                                                        hash_base=>"HEAD", file_name=>$file_name)},
5988                                         "HEAD");
5989                 } else {
5990                         $formats_nav .=
5991                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5992                                         "raw");
5993                 }
5994                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5995                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5996         } else {
5997                 print "<div class=\"page_nav\">\n" .
5998                       "<br/><br/></div>\n" .
5999                       "<div class=\"title\">$hash</div>\n";
6000         }
6001         git_print_page_path($file_name, "blob", $hash_base);
6002         print "<div class=\"page_body\">\n";
6003         if ($mimetype =~ m!^image/!) {
6004                 print qq!<img type="$mimetype"!;
6005                 if ($file_name) {
6006                         print qq! alt="$file_name" title="$file_name"!;
6007                 }
6008                 print qq! src="! .
6009                       href(action=>"blob_plain", hash=>$hash,
6010                            hash_base=>$hash_base, file_name=>$file_name) .
6011                       qq!" />\n!;
6012         } else {
6013                 my $nr;
6014                 while (my $line = <$fd>) {
6015                         chomp $line;
6016                         $nr++;
6017                         $line = untabify($line);
6018                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
6019                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
6020                 }
6021         }
6022         close $fd
6023                 or print "Reading blob failed.\n";
6024         print "</div>";
6025         git_footer_html();
6026 }
6027
6028 sub git_tree {
6029         if (!defined $hash_base) {
6030                 $hash_base = "HEAD";
6031         }
6032         if (!defined $hash) {
6033                 if (defined $file_name) {
6034                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
6035                 } else {
6036                         $hash = $hash_base;
6037                 }
6038         }
6039         die_error(404, "No such tree") unless defined($hash);
6040
6041         my $show_sizes = gitweb_check_feature('show-sizes');
6042         my $have_blame = gitweb_check_feature('blame');
6043
6044         my @entries = ();
6045         {
6046                 local $/ = "\0";
6047                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6048                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6049                         or die_error(500, "Open git-ls-tree failed");
6050                 @entries = map { chomp; $_ } <$fd>;
6051                 close $fd
6052                         or die_error(404, "Reading tree failed");
6053         }
6054
6055         my $refs = git_get_references();
6056         my $ref = format_ref_marker($refs, $hash_base);
6057         git_header_html();
6058         my $basedir = '';
6059         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6060                 my @views_nav = ();
6061                 if (defined $file_name) {
6062                         push @views_nav,
6063                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6064                                         "history"),
6065                                 $cgi->a({-href => href(action=>"tree",
6066                                                        hash_base=>"HEAD", file_name=>$file_name)},
6067                                         "HEAD"),
6068                 }
6069                 my $snapshot_links = format_snapshot_links($hash);
6070                 if (defined $snapshot_links) {
6071                         # FIXME: Should be available when we have no hash base as well.
6072                         push @views_nav, $snapshot_links;
6073                 }
6074                 git_print_page_nav('tree','', $hash_base, undef, undef,
6075                                    join(' | ', @views_nav));
6076                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6077         } else {
6078                 undef $hash_base;
6079                 print "<div class=\"page_nav\">\n";
6080                 print "<br/><br/></div>\n";
6081                 print "<div class=\"title\">$hash</div>\n";
6082         }
6083         if (defined $file_name) {
6084                 $basedir = $file_name;
6085                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6086                         $basedir .= '/';
6087                 }
6088                 git_print_page_path($file_name, 'tree', $hash_base);
6089         }
6090         print "<div class=\"page_body\">\n";
6091         print "<table class=\"tree\">\n";
6092         my $alternate = 1;
6093         # '..' (top directory) link if possible
6094         if (defined $hash_base &&
6095             defined $file_name && $file_name =~ m![^/]+$!) {
6096                 if ($alternate) {
6097                         print "<tr class=\"dark\">\n";
6098                 } else {
6099                         print "<tr class=\"light\">\n";
6100                 }
6101                 $alternate ^= 1;
6102
6103                 my $up = $file_name;
6104                 $up =~ s!/?[^/]+$!!;
6105                 undef $up unless $up;
6106                 # based on git_print_tree_entry
6107                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6108                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6109                 print '<td class="list">';
6110                 print $cgi->a({-href => href(action=>"tree",
6111                                              hash_base=>$hash_base,
6112                                              file_name=>$up)},
6113                               "..");
6114                 print "</td>\n";
6115                 print "<td class=\"link\"></td>\n";
6116
6117                 print "</tr>\n";
6118         }
6119         foreach my $line (@entries) {
6120                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6121
6122                 if ($alternate) {
6123                         print "<tr class=\"dark\">\n";
6124                 } else {
6125                         print "<tr class=\"light\">\n";
6126                 }
6127                 $alternate ^= 1;
6128
6129                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6130
6131                 print "</tr>\n";
6132         }
6133         print "</table>\n" .
6134               "</div>";
6135         git_footer_html();
6136 }
6137
6138 sub snapshot_name {
6139         my ($project, $hash) = @_;
6140
6141         # path/to/project.git  -> project
6142         # path/to/project/.git -> project
6143         my $name = to_utf8($project);
6144         $name =~ s,([^/])/*\.git$,$1,;
6145         $name = basename($name);
6146         # sanitize name
6147         $name =~ s/[[:cntrl:]]/?/g;
6148
6149         my $ver = $hash;
6150         if ($hash =~ /^[0-9a-fA-F]+$/) {
6151                 # shorten SHA-1 hash
6152                 my $full_hash = git_get_full_hash($project, $hash);
6153                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6154                         $ver = git_get_short_hash($project, $hash);
6155                 }
6156         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6157                 # tags don't need shortened SHA-1 hash
6158                 $ver = $1;
6159         } else {
6160                 # branches and other need shortened SHA-1 hash
6161                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6162                         $ver = $1;
6163                 }
6164                 $ver .= '-' . git_get_short_hash($project, $hash);
6165         }
6166         # in case of hierarchical branch names
6167         $ver =~ s!/!.!g;
6168
6169         # name = project-version_string
6170         $name = "$name-$ver";
6171
6172         return wantarray ? ($name, $name) : $name;
6173 }
6174
6175 sub git_snapshot {
6176         my $format = $input_params{'snapshot_format'};
6177         if (!@snapshot_fmts) {
6178                 die_error(403, "Snapshots not allowed");
6179         }
6180         # default to first supported snapshot format
6181         $format ||= $snapshot_fmts[0];
6182         if ($format !~ m/^[a-z0-9]+$/) {
6183                 die_error(400, "Invalid snapshot format parameter");
6184         } elsif (!exists($known_snapshot_formats{$format})) {
6185                 die_error(400, "Unknown snapshot format");
6186         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6187                 die_error(403, "Snapshot format not allowed");
6188         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6189                 die_error(403, "Unsupported snapshot format");
6190         }
6191
6192         my $type = git_get_type("$hash^{}");
6193         if (!$type) {
6194                 die_error(404, 'Object does not exist');
6195         }  elsif ($type eq 'blob') {
6196                 die_error(400, 'Object is not a tree-ish');
6197         }
6198
6199         my ($name, $prefix) = snapshot_name($project, $hash);
6200         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6201         my $cmd = quote_command(
6202                 git_cmd(), 'archive',
6203                 "--format=$known_snapshot_formats{$format}{'format'}",
6204                 "--prefix=$prefix/", $hash);
6205         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6206                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6207         }
6208
6209         $filename =~ s/(["\\])/\\$1/g;
6210         print $cgi->header(
6211                 -type => $known_snapshot_formats{$format}{'type'},
6212                 -content_disposition => 'inline; filename="' . $filename . '"',
6213                 -status => '200 OK');
6214
6215         open my $fd, "-|", $cmd
6216                 or die_error(500, "Execute git-archive failed");
6217         binmode STDOUT, ':raw';
6218         print <$fd>;
6219         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6220         close $fd;
6221 }
6222
6223 sub git_log_generic {
6224         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6225
6226         my $head = git_get_head_hash($project);
6227         if (!defined $base) {
6228                 $base = $head;
6229         }
6230         if (!defined $page) {
6231                 $page = 0;
6232         }
6233         my $refs = git_get_references();
6234
6235         my $commit_hash = $base;
6236         if (defined $parent) {
6237                 $commit_hash = "$parent..$base";
6238         }
6239         my @commitlist =
6240                 parse_commits($commit_hash, 101, (100 * $page),
6241                               defined $file_name ? ($file_name, "--full-history") : ());
6242
6243         my $ftype;
6244         if (!defined $file_hash && defined $file_name) {
6245                 # some commits could have deleted file in question,
6246                 # and not have it in tree, but one of them has to have it
6247                 for (my $i = 0; $i < @commitlist; $i++) {
6248                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6249                         last if defined $file_hash;
6250                 }
6251         }
6252         if (defined $file_hash) {
6253                 $ftype = git_get_type($file_hash);
6254         }
6255         if (defined $file_name && !defined $ftype) {
6256                 die_error(500, "Unknown type of object");
6257         }
6258         my %co;
6259         if (defined $file_name) {
6260                 %co = parse_commit($base)
6261                         or die_error(404, "Unknown commit object");
6262         }
6263
6264
6265         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6266         my $next_link = '';
6267         if ($#commitlist >= 100) {
6268                 $next_link =
6269                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6270                                  -accesskey => "n", -title => "Alt-n"}, "next");
6271         }
6272         my $patch_max = gitweb_get_feature('patches');
6273         if ($patch_max && !defined $file_name) {
6274                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6275                         $paging_nav .= " &sdot; " .
6276                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6277                                         "patches");
6278                 }
6279         }
6280
6281         git_header_html();
6282         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6283         if (defined $file_name) {
6284                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6285         } else {
6286                 git_print_header_div('summary', $project)
6287         }
6288         git_print_page_path($file_name, $ftype, $hash_base)
6289                 if (defined $file_name);
6290
6291         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6292                      $file_name, $file_hash, $ftype);
6293
6294         git_footer_html();
6295 }
6296
6297 sub git_log {
6298         git_log_generic('log', \&git_log_body,
6299                         $hash, $hash_parent);
6300 }
6301
6302 sub git_commit {
6303         $hash ||= $hash_base || "HEAD";
6304         my %co = parse_commit($hash)
6305             or die_error(404, "Unknown commit object");
6306
6307         my $parent  = $co{'parent'};
6308         my $parents = $co{'parents'}; # listref
6309
6310         # we need to prepare $formats_nav before any parameter munging
6311         my $formats_nav;
6312         if (!defined $parent) {
6313                 # --root commitdiff
6314                 $formats_nav .= '(initial)';
6315         } elsif (@$parents == 1) {
6316                 # single parent commit
6317                 $formats_nav .=
6318                         '(parent: ' .
6319                         $cgi->a({-href => href(action=>"commit",
6320                                                hash=>$parent)},
6321                                 esc_html(substr($parent, 0, 7))) .
6322                         ')';
6323         } else {
6324                 # merge commit
6325                 $formats_nav .=
6326                         '(merge: ' .
6327                         join(' ', map {
6328                                 $cgi->a({-href => href(action=>"commit",
6329                                                        hash=>$_)},
6330                                         esc_html(substr($_, 0, 7)));
6331                         } @$parents ) .
6332                         ')';
6333         }
6334         if (gitweb_check_feature('patches') && @$parents <= 1) {
6335                 $formats_nav .= " | " .
6336                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6337                                 "patch");
6338         }
6339
6340         if (!defined $parent) {
6341                 $parent = "--root";
6342         }
6343         my @difftree;
6344         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6345                 @diff_opts,
6346                 (@$parents <= 1 ? $parent : '-c'),
6347                 $hash, "--"
6348                 or die_error(500, "Open git-diff-tree failed");
6349         @difftree = map { chomp; $_ } <$fd>;
6350         close $fd or die_error(404, "Reading git-diff-tree failed");
6351
6352         # non-textual hash id's can be cached
6353         my $expires;
6354         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6355                 $expires = "+1d";
6356         }
6357         my $refs = git_get_references();
6358         my $ref = format_ref_marker($refs, $co{'id'});
6359
6360         git_header_html(undef, $expires);
6361         git_print_page_nav('commit', '',
6362                            $hash, $co{'tree'}, $hash,
6363                            $formats_nav);
6364
6365         if (defined $co{'parent'}) {
6366                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6367         } else {
6368                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6369         }
6370         print "<div class=\"title_text\">\n" .
6371               "<table class=\"object_header\">\n";
6372         git_print_authorship_rows(\%co);
6373         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6374         print "<tr>" .
6375               "<td>tree</td>" .
6376               "<td class=\"sha1\">" .
6377               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6378                        class => "list"}, $co{'tree'}) .
6379               "</td>" .
6380               "<td class=\"link\">" .
6381               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6382                       "tree");
6383         my $snapshot_links = format_snapshot_links($hash);
6384         if (defined $snapshot_links) {
6385                 print " | " . $snapshot_links;
6386         }
6387         print "</td>" .
6388               "</tr>\n";
6389
6390         foreach my $par (@$parents) {
6391                 print "<tr>" .
6392                       "<td>parent</td>" .
6393                       "<td class=\"sha1\">" .
6394                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6395                                class => "list"}, $par) .
6396                       "</td>" .
6397                       "<td class=\"link\">" .
6398                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6399                       " | " .
6400                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6401                       "</td>" .
6402                       "</tr>\n";
6403         }
6404         print "</table>".
6405               "</div>\n";
6406
6407         print "<div class=\"page_body\">\n";
6408         git_print_log($co{'comment'});
6409         print "</div>\n";
6410
6411         git_difftree_body(\@difftree, $hash, @$parents);
6412
6413         git_footer_html();
6414 }
6415
6416 sub git_object {
6417         # object is defined by:
6418         # - hash or hash_base alone
6419         # - hash_base and file_name
6420         my $type;
6421
6422         # - hash or hash_base alone
6423         if ($hash || ($hash_base && !defined $file_name)) {
6424                 my $object_id = $hash || $hash_base;
6425
6426                 open my $fd, "-|", quote_command(
6427                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6428                         or die_error(404, "Object does not exist");
6429                 $type = <$fd>;
6430                 chomp $type;
6431                 close $fd
6432                         or die_error(404, "Object does not exist");
6433
6434         # - hash_base and file_name
6435         } elsif ($hash_base && defined $file_name) {
6436                 $file_name =~ s,/+$,,;
6437
6438                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6439                         or die_error(404, "Base object does not exist");
6440
6441                 # here errors should not hapen
6442                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6443                         or die_error(500, "Open git-ls-tree failed");
6444                 my $line = <$fd>;
6445                 close $fd;
6446
6447                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6448                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6449                         die_error(404, "File or directory for given base does not exist");
6450                 }
6451                 $type = $2;
6452                 $hash = $3;
6453         } else {
6454                 die_error(400, "Not enough information to find object");
6455         }
6456
6457         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6458                                           hash=>$hash, hash_base=>$hash_base,
6459                                           file_name=>$file_name),
6460                              -status => '302 Found');
6461 }
6462
6463 sub git_blobdiff {
6464         my $format = shift || 'html';
6465
6466         my $fd;
6467         my @difftree;
6468         my %diffinfo;
6469         my $expires;
6470
6471         # preparing $fd and %diffinfo for git_patchset_body
6472         # new style URI
6473         if (defined $hash_base && defined $hash_parent_base) {
6474                 if (defined $file_name) {
6475                         # read raw output
6476                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6477                                 $hash_parent_base, $hash_base,
6478                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6479                                 or die_error(500, "Open git-diff-tree failed");
6480                         @difftree = map { chomp; $_ } <$fd>;
6481                         close $fd
6482                                 or die_error(404, "Reading git-diff-tree failed");
6483                         @difftree
6484                                 or die_error(404, "Blob diff not found");
6485
6486                 } elsif (defined $hash &&
6487                          $hash =~ /[0-9a-fA-F]{40}/) {
6488                         # try to find filename from $hash
6489
6490                         # read filtered raw output
6491                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6492                                 $hash_parent_base, $hash_base, "--"
6493                                 or die_error(500, "Open git-diff-tree failed");
6494                         @difftree =
6495                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6496                                 # $hash == to_id
6497                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6498                                 map { chomp; $_ } <$fd>;
6499                         close $fd
6500                                 or die_error(404, "Reading git-diff-tree failed");
6501                         @difftree
6502                                 or die_error(404, "Blob diff not found");
6503
6504                 } else {
6505                         die_error(400, "Missing one of the blob diff parameters");
6506                 }
6507
6508                 if (@difftree > 1) {
6509                         die_error(400, "Ambiguous blob diff specification");
6510                 }
6511
6512                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6513                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6514                 $file_name   ||= $diffinfo{'to_file'};
6515
6516                 $hash_parent ||= $diffinfo{'from_id'};
6517                 $hash        ||= $diffinfo{'to_id'};
6518
6519                 # non-textual hash id's can be cached
6520                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6521                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6522                         $expires = '+1d';
6523                 }
6524
6525                 # open patch output
6526                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6527                         '-p', ($format eq 'html' ? "--full-index" : ()),
6528                         $hash_parent_base, $hash_base,
6529                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6530                         or die_error(500, "Open git-diff-tree failed");
6531         }
6532
6533         # old/legacy style URI -- not generated anymore since 1.4.3.
6534         if (!%diffinfo) {
6535                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6536         }
6537
6538         # header
6539         if ($format eq 'html') {
6540                 my $formats_nav =
6541                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6542                                 "raw");
6543                 git_header_html(undef, $expires);
6544                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6545                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6546                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6547                 } else {
6548                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6549                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6550                 }
6551                 if (defined $file_name) {
6552                         git_print_page_path($file_name, "blob", $hash_base);
6553                 } else {
6554                         print "<div class=\"page_path\"></div>\n";
6555                 }
6556
6557         } elsif ($format eq 'plain') {
6558                 print $cgi->header(
6559                         -type => 'text/plain',
6560                         -charset => 'utf-8',
6561                         -expires => $expires,
6562                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6563
6564                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6565
6566         } else {
6567                 die_error(400, "Unknown blobdiff format");
6568         }
6569
6570         # patch
6571         if ($format eq 'html') {
6572                 print "<div class=\"page_body\">\n";
6573
6574                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6575                 close $fd;
6576
6577                 print "</div>\n"; # class="page_body"
6578                 git_footer_html();
6579
6580         } else {
6581                 while (my $line = <$fd>) {
6582                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6583                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6584
6585                         print $line;
6586
6587                         last if $line =~ m!^\+\+\+!;
6588                 }
6589                 local $/ = undef;
6590                 print <$fd>;
6591                 close $fd;
6592         }
6593 }
6594
6595 sub git_blobdiff_plain {
6596         git_blobdiff('plain');
6597 }
6598
6599 sub git_commitdiff {
6600         my %params = @_;
6601         my $format = $params{-format} || 'html';
6602
6603         my ($patch_max) = gitweb_get_feature('patches');
6604         if ($format eq 'patch') {
6605                 die_error(403, "Patch view not allowed") unless $patch_max;
6606         }
6607
6608         $hash ||= $hash_base || "HEAD";
6609         my %co = parse_commit($hash)
6610             or die_error(404, "Unknown commit object");
6611
6612         # choose format for commitdiff for merge
6613         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6614                 $hash_parent = '--cc';
6615         }
6616         # we need to prepare $formats_nav before almost any parameter munging
6617         my $formats_nav;
6618         if ($format eq 'html') {
6619                 $formats_nav =
6620                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6621                                 "raw");
6622                 if ($patch_max && @{$co{'parents'}} <= 1) {
6623                         $formats_nav .= " | " .
6624                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6625                                         "patch");
6626                 }
6627
6628                 if (defined $hash_parent &&
6629                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6630                         # commitdiff with two commits given
6631                         my $hash_parent_short = $hash_parent;
6632                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6633                                 $hash_parent_short = substr($hash_parent, 0, 7);
6634                         }
6635                         $formats_nav .=
6636                                 ' (from';
6637                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6638                                 if ($co{'parents'}[$i] eq $hash_parent) {
6639                                         $formats_nav .= ' parent ' . ($i+1);
6640                                         last;
6641                                 }
6642                         }
6643                         $formats_nav .= ': ' .
6644                                 $cgi->a({-href => href(action=>"commitdiff",
6645                                                        hash=>$hash_parent)},
6646                                         esc_html($hash_parent_short)) .
6647                                 ')';
6648                 } elsif (!$co{'parent'}) {
6649                         # --root commitdiff
6650                         $formats_nav .= ' (initial)';
6651                 } elsif (scalar @{$co{'parents'}} == 1) {
6652                         # single parent commit
6653                         $formats_nav .=
6654                                 ' (parent: ' .
6655                                 $cgi->a({-href => href(action=>"commitdiff",
6656                                                        hash=>$co{'parent'})},
6657                                         esc_html(substr($co{'parent'}, 0, 7))) .
6658                                 ')';
6659                 } else {
6660                         # merge commit
6661                         if ($hash_parent eq '--cc') {
6662                                 $formats_nav .= ' | ' .
6663                                         $cgi->a({-href => href(action=>"commitdiff",
6664                                                                hash=>$hash, hash_parent=>'-c')},
6665                                                 'combined');
6666                         } else { # $hash_parent eq '-c'
6667                                 $formats_nav .= ' | ' .
6668                                         $cgi->a({-href => href(action=>"commitdiff",
6669                                                                hash=>$hash, hash_parent=>'--cc')},
6670                                                 'compact');
6671                         }
6672                         $formats_nav .=
6673                                 ' (merge: ' .
6674                                 join(' ', map {
6675                                         $cgi->a({-href => href(action=>"commitdiff",
6676                                                                hash=>$_)},
6677                                                 esc_html(substr($_, 0, 7)));
6678                                 } @{$co{'parents'}} ) .
6679                                 ')';
6680                 }
6681         }
6682
6683         my $hash_parent_param = $hash_parent;
6684         if (!defined $hash_parent_param) {
6685                 # --cc for multiple parents, --root for parentless
6686                 $hash_parent_param =
6687                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6688         }
6689
6690         # read commitdiff
6691         my $fd;
6692         my @difftree;
6693         if ($format eq 'html') {
6694                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6695                         "--no-commit-id", "--patch-with-raw", "--full-index",
6696                         $hash_parent_param, $hash, "--"
6697                         or die_error(500, "Open git-diff-tree failed");
6698
6699                 while (my $line = <$fd>) {
6700                         chomp $line;
6701                         # empty line ends raw part of diff-tree output
6702                         last unless $line;
6703                         push @difftree, scalar parse_difftree_raw_line($line);
6704                 }
6705
6706         } elsif ($format eq 'plain') {
6707                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6708                         '-p', $hash_parent_param, $hash, "--"
6709                         or die_error(500, "Open git-diff-tree failed");
6710         } elsif ($format eq 'patch') {
6711                 # For commit ranges, we limit the output to the number of
6712                 # patches specified in the 'patches' feature.
6713                 # For single commits, we limit the output to a single patch,
6714                 # diverging from the git-format-patch default.
6715                 my @commit_spec = ();
6716                 if ($hash_parent) {
6717                         if ($patch_max > 0) {
6718                                 push @commit_spec, "-$patch_max";
6719                         }
6720                         push @commit_spec, '-n', "$hash_parent..$hash";
6721                 } else {
6722                         if ($params{-single}) {
6723                                 push @commit_spec, '-1';
6724                         } else {
6725                                 if ($patch_max > 0) {
6726                                         push @commit_spec, "-$patch_max";
6727                                 }
6728                                 push @commit_spec, "-n";
6729                         }
6730                         push @commit_spec, '--root', $hash;
6731                 }
6732                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6733                         '--encoding=utf8', '--stdout', @commit_spec
6734                         or die_error(500, "Open git-format-patch failed");
6735         } else {
6736                 die_error(400, "Unknown commitdiff format");
6737         }
6738
6739         # non-textual hash id's can be cached
6740         my $expires;
6741         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6742                 $expires = "+1d";
6743         }
6744
6745         # write commit message
6746         if ($format eq 'html') {
6747                 my $refs = git_get_references();
6748                 my $ref = format_ref_marker($refs, $co{'id'});
6749
6750                 git_header_html(undef, $expires);
6751                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6752                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6753                 print "<div class=\"title_text\">\n" .
6754                       "<table class=\"object_header\">\n";
6755                 git_print_authorship_rows(\%co);
6756                 print "</table>".
6757                       "</div>\n";
6758                 print "<div class=\"page_body\">\n";
6759                 if (@{$co{'comment'}} > 1) {
6760                         print "<div class=\"log\">\n";
6761                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6762                         print "</div>\n"; # class="log"
6763                 }
6764
6765         } elsif ($format eq 'plain') {
6766                 my $refs = git_get_references("tags");
6767                 my $tagname = git_get_rev_name_tags($hash);
6768                 my $filename = basename($project) . "-$hash.patch";
6769
6770                 print $cgi->header(
6771                         -type => 'text/plain',
6772                         -charset => 'utf-8',
6773                         -expires => $expires,
6774                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6775                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6776                 print "From: " . to_utf8($co{'author'}) . "\n";
6777                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6778                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6779
6780                 print "X-Git-Tag: $tagname\n" if $tagname;
6781                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6782
6783                 foreach my $line (@{$co{'comment'}}) {
6784                         print to_utf8($line) . "\n";
6785                 }
6786                 print "---\n\n";
6787         } elsif ($format eq 'patch') {
6788                 my $filename = basename($project) . "-$hash.patch";
6789
6790                 print $cgi->header(
6791                         -type => 'text/plain',
6792                         -charset => 'utf-8',
6793                         -expires => $expires,
6794                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6795         }
6796
6797         # write patch
6798         if ($format eq 'html') {
6799                 my $use_parents = !defined $hash_parent ||
6800                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6801                 git_difftree_body(\@difftree, $hash,
6802                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6803                 print "<br/>\n";
6804
6805                 git_patchset_body($fd, \@difftree, $hash,
6806                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6807                 close $fd;
6808                 print "</div>\n"; # class="page_body"
6809                 git_footer_html();
6810
6811         } elsif ($format eq 'plain') {
6812                 local $/ = undef;
6813                 print <$fd>;
6814                 close $fd
6815                         or print "Reading git-diff-tree failed\n";
6816         } elsif ($format eq 'patch') {
6817                 local $/ = undef;
6818                 print <$fd>;
6819                 close $fd
6820                         or print "Reading git-format-patch failed\n";
6821         }
6822 }
6823
6824 sub git_commitdiff_plain {
6825         git_commitdiff(-format => 'plain');
6826 }
6827
6828 # format-patch-style patches
6829 sub git_patch {
6830         git_commitdiff(-format => 'patch', -single => 1);
6831 }
6832
6833 sub git_patches {
6834         git_commitdiff(-format => 'patch');
6835 }
6836
6837 sub git_history {
6838         git_log_generic('history', \&git_history_body,
6839                         $hash_base, $hash_parent_base,
6840                         $file_name, $hash);
6841 }
6842
6843 sub git_search {
6844         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6845         if (!defined $searchtext) {
6846                 die_error(400, "Text field is empty");
6847         }
6848         if (!defined $hash) {
6849                 $hash = git_get_head_hash($project);
6850         }
6851         my %co = parse_commit($hash);
6852         if (!%co) {
6853                 die_error(404, "Unknown commit object");
6854         }
6855         if (!defined $page) {
6856                 $page = 0;
6857         }
6858
6859         $searchtype ||= 'commit';
6860         if ($searchtype eq 'pickaxe') {
6861                 # pickaxe may take all resources of your box and run for several minutes
6862                 # with every query - so decide by yourself how public you make this feature
6863                 gitweb_check_feature('pickaxe')
6864                     or die_error(403, "Pickaxe is disabled");
6865         }
6866         if ($searchtype eq 'grep') {
6867                 gitweb_check_feature('grep')
6868                     or die_error(403, "Grep is disabled");
6869         }
6870
6871         git_header_html();
6872
6873         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6874                 my $greptype;
6875                 if ($searchtype eq 'commit') {
6876                         $greptype = "--grep=";
6877                 } elsif ($searchtype eq 'author') {
6878                         $greptype = "--author=";
6879                 } elsif ($searchtype eq 'committer') {
6880                         $greptype = "--committer=";
6881                 }
6882                 $greptype .= $searchtext;
6883                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6884                                                $greptype, '--regexp-ignore-case',
6885                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6886
6887                 my $paging_nav = '';
6888                 if ($page > 0) {
6889                         $paging_nav .=
6890                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6891                                                        searchtext=>$searchtext,
6892                                                        searchtype=>$searchtype)},
6893                                         "first");
6894                         $paging_nav .= " &sdot; " .
6895                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6896                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6897                 } else {
6898                         $paging_nav .= "first";
6899                         $paging_nav .= " &sdot; prev";
6900                 }
6901                 my $next_link = '';
6902                 if ($#commitlist >= 100) {
6903                         $next_link =
6904                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6905                                          -accesskey => "n", -title => "Alt-n"}, "next");
6906                         $paging_nav .= " &sdot; $next_link";
6907                 } else {
6908                         $paging_nav .= " &sdot; next";
6909                 }
6910
6911                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6912                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6913                 if ($page == 0 && !@commitlist) {
6914                         print "<p>No match.</p>\n";
6915                 } else {
6916                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6917                 }
6918         }
6919
6920         if ($searchtype eq 'pickaxe') {
6921                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6922                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6923
6924                 print "<table class=\"pickaxe search\">\n";
6925                 my $alternate = 1;
6926                 local $/ = "\n";
6927                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6928                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6929                         ($search_use_regexp ? '--pickaxe-regex' : ());
6930                 undef %co;
6931                 my @files;
6932                 while (my $line = <$fd>) {
6933                         chomp $line;
6934                         next unless $line;
6935
6936                         my %set = parse_difftree_raw_line($line);
6937                         if (defined $set{'commit'}) {
6938                                 # finish previous commit
6939                                 if (%co) {
6940                                         print "</td>\n" .
6941                                               "<td class=\"link\">" .
6942                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6943                                               " | " .
6944                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6945                                         print "</td>\n" .
6946                                               "</tr>\n";
6947                                 }
6948
6949                                 if ($alternate) {
6950                                         print "<tr class=\"dark\">\n";
6951                                 } else {
6952                                         print "<tr class=\"light\">\n";
6953                                 }
6954                                 $alternate ^= 1;
6955                                 %co = parse_commit($set{'commit'});
6956                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6957                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6958                                       "<td><i>$author</i></td>\n" .
6959                                       "<td>" .
6960                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6961                                               -class => "list subject"},
6962                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6963                         } elsif (defined $set{'to_id'}) {
6964                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6965
6966                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6967                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6968                                               -class => "list"},
6969                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6970                                       "<br/>\n";
6971                         }
6972                 }
6973                 close $fd;
6974
6975                 # finish last commit (warning: repetition!)
6976                 if (%co) {
6977                         print "</td>\n" .
6978                               "<td class=\"link\">" .
6979                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6980                               " | " .
6981                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6982                         print "</td>\n" .
6983                               "</tr>\n";
6984                 }
6985
6986                 print "</table>\n";
6987         }
6988
6989         if ($searchtype eq 'grep') {
6990                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6991                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6992
6993                 print "<table class=\"grep_search\">\n";
6994                 my $alternate = 1;
6995                 my $matches = 0;
6996                 local $/ = "\n";
6997                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6998                         $search_use_regexp ? ('-E', '-i') : '-F',
6999                         $searchtext, $co{'tree'};
7000                 my $lastfile = '';
7001                 while (my $line = <$fd>) {
7002                         chomp $line;
7003                         my ($file, $lno, $ltext, $binary);
7004                         last if ($matches++ > 1000);
7005                         if ($line =~ /^Binary file (.+) matches$/) {
7006                                 $file = $1;
7007                                 $binary = 1;
7008                         } else {
7009                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
7010                         }
7011                         if ($file ne $lastfile) {
7012                                 $lastfile and print "</td></tr>\n";
7013                                 if ($alternate++) {
7014                                         print "<tr class=\"dark\">\n";
7015                                 } else {
7016                                         print "<tr class=\"light\">\n";
7017                                 }
7018                                 print "<td class=\"list\">".
7019                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7020                                                                file_name=>"$file"),
7021                                                 -class => "list"}, esc_path($file));
7022                                 print "</td><td>\n";
7023                                 $lastfile = $file;
7024                         }
7025                         if ($binary) {
7026                                 print "<div class=\"binary\">Binary file</div>\n";
7027                         } else {
7028                                 $ltext = untabify($ltext);
7029                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
7030                                         $ltext = esc_html($1, -nbsp=>1);
7031                                         $ltext .= '<span class="match">';
7032                                         $ltext .= esc_html($2, -nbsp=>1);
7033                                         $ltext .= '</span>';
7034                                         $ltext .= esc_html($3, -nbsp=>1);
7035                                 } else {
7036                                         $ltext = esc_html($ltext, -nbsp=>1);
7037                                 }
7038                                 print "<div class=\"pre\">" .
7039                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
7040                                                                file_name=>"$file").'#l'.$lno,
7041                                                 -class => "linenr"}, sprintf('%4i', $lno))
7042                                         . ' ' .  $ltext . "</div>\n";
7043                         }
7044                 }
7045                 if ($lastfile) {
7046                         print "</td></tr>\n";
7047                         if ($matches > 1000) {
7048                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7049                         }
7050                 } else {
7051                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7052                 }
7053                 close $fd;
7054
7055                 print "</table>\n";
7056         }
7057         git_footer_html();
7058 }
7059
7060 sub git_search_help {
7061         git_header_html();
7062         git_print_page_nav('','', $hash,$hash,$hash);
7063         print <<EOT;
7064 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7065 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7066 the pattern entered is recognized as the POSIX extended
7067 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7068 insensitive).</p>
7069 <dl>
7070 <dt><b>commit</b></dt>
7071 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7072 EOT
7073         my $have_grep = gitweb_check_feature('grep');
7074         if ($have_grep) {
7075                 print <<EOT;
7076 <dt><b>grep</b></dt>
7077 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7078     a different one) are searched for the given pattern. On large trees, this search can take
7079 a while and put some strain on the server, so please use it with some consideration. Note that
7080 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7081 case-sensitive.</dd>
7082 EOT
7083         }
7084         print <<EOT;
7085 <dt><b>author</b></dt>
7086 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7087 <dt><b>committer</b></dt>
7088 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7089 EOT
7090         my $have_pickaxe = gitweb_check_feature('pickaxe');
7091         if ($have_pickaxe) {
7092                 print <<EOT;
7093 <dt><b>pickaxe</b></dt>
7094 <dd>All commits that caused the string to appear or disappear from any file (changes that
7095 added, removed or "modified" the string) will be listed. This search can take a while and
7096 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7097 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7098 EOT
7099         }
7100         print "</dl>\n";
7101         git_footer_html();
7102 }
7103
7104 sub git_shortlog {
7105         git_log_generic('shortlog', \&git_shortlog_body,
7106                         $hash, $hash_parent);
7107 }
7108
7109 ## ......................................................................
7110 ## feeds (RSS, Atom; OPML)
7111
7112 sub git_feed {
7113         my $format = shift || 'atom';
7114         my $have_blame = gitweb_check_feature('blame');
7115
7116         # Atom: http://www.atomenabled.org/developers/syndication/
7117         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7118         if ($format ne 'rss' && $format ne 'atom') {
7119                 die_error(400, "Unknown web feed format");
7120         }
7121
7122         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7123         my $head = $hash || 'HEAD';
7124         my @commitlist = parse_commits($head, 150, 0, $file_name);
7125
7126         my %latest_commit;
7127         my %latest_date;
7128         my $content_type = "application/$format+xml";
7129         if (defined $cgi->http('HTTP_ACCEPT') &&
7130                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7131                 # browser (feed reader) prefers text/xml
7132                 $content_type = 'text/xml';
7133         }
7134         if (defined($commitlist[0])) {
7135                 %latest_commit = %{$commitlist[0]};
7136                 my $latest_epoch = $latest_commit{'committer_epoch'};
7137                 %latest_date   = parse_date($latest_epoch);
7138                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7139                 if (defined $if_modified) {
7140                         my $since;
7141                         if (eval { require HTTP::Date; 1; }) {
7142                                 $since = HTTP::Date::str2time($if_modified);
7143                         } elsif (eval { require Time::ParseDate; 1; }) {
7144                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7145                         }
7146                         if (defined $since && $latest_epoch <= $since) {
7147                                 print $cgi->header(
7148                                         -type => $content_type,
7149                                         -charset => 'utf-8',
7150                                         -last_modified => $latest_date{'rfc2822'},
7151                                         -status => '304 Not Modified');
7152                                 return;
7153                         }
7154                 }
7155                 print $cgi->header(
7156                         -type => $content_type,
7157                         -charset => 'utf-8',
7158                         -last_modified => $latest_date{'rfc2822'});
7159         } else {
7160                 print $cgi->header(
7161                         -type => $content_type,
7162                         -charset => 'utf-8');
7163         }
7164
7165         # Optimization: skip generating the body if client asks only
7166         # for Last-Modified date.
7167         return if ($cgi->request_method() eq 'HEAD');
7168
7169         # header variables
7170         my $title = "$site_name - $project/$action";
7171         my $feed_type = 'log';
7172         if (defined $hash) {
7173                 $title .= " - '$hash'";
7174                 $feed_type = 'branch log';
7175                 if (defined $file_name) {
7176                         $title .= " :: $file_name";
7177                         $feed_type = 'history';
7178                 }
7179         } elsif (defined $file_name) {
7180                 $title .= " - $file_name";
7181                 $feed_type = 'history';
7182         }
7183         $title .= " $feed_type";
7184         my $descr = git_get_project_description($project);
7185         if (defined $descr) {
7186                 $descr = esc_html($descr);
7187         } else {
7188                 $descr = "$project " .
7189                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7190                          " feed";
7191         }
7192         my $owner = git_get_project_owner($project);
7193         $owner = esc_html($owner);
7194
7195         #header
7196         my $alt_url;
7197         if (defined $file_name) {
7198                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7199         } elsif (defined $hash) {
7200                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7201         } else {
7202                 $alt_url = href(-full=>1, action=>"summary");
7203         }
7204         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7205         if ($format eq 'rss') {
7206                 print <<XML;
7207 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7208 <channel>
7209 XML
7210                 print "<title>$title</title>\n" .
7211                       "<link>$alt_url</link>\n" .
7212                       "<description>$descr</description>\n" .
7213                       "<language>en</language>\n" .
7214                       # project owner is responsible for 'editorial' content
7215                       "<managingEditor>$owner</managingEditor>\n";
7216                 if (defined $logo || defined $favicon) {
7217                         # prefer the logo to the favicon, since RSS
7218                         # doesn't allow both
7219                         my $img = esc_url($logo || $favicon);
7220                         print "<image>\n" .
7221                               "<url>$img</url>\n" .
7222                               "<title>$title</title>\n" .
7223                               "<link>$alt_url</link>\n" .
7224                               "</image>\n";
7225                 }
7226                 if (%latest_date) {
7227                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7228                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7229                 }
7230                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7231         } elsif ($format eq 'atom') {
7232                 print <<XML;
7233 <feed xmlns="http://www.w3.org/2005/Atom">
7234 XML
7235                 print "<title>$title</title>\n" .
7236                       "<subtitle>$descr</subtitle>\n" .
7237                       '<link rel="alternate" type="text/html" href="' .
7238                       $alt_url . '" />' . "\n" .
7239                       '<link rel="self" type="' . $content_type . '" href="' .
7240                       $cgi->self_url() . '" />' . "\n" .
7241                       "<id>" . href(-full=>1) . "</id>\n" .
7242                       # use project owner for feed author
7243                       "<author><name>$owner</name></author>\n";
7244                 if (defined $favicon) {
7245                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7246                 }
7247                 if (defined $logo_url) {
7248                         # not twice as wide as tall: 72 x 27 pixels
7249                         print "<logo>" . esc_url($logo) . "</logo>\n";
7250                 }
7251                 if (! %latest_date) {
7252                         # dummy date to keep the feed valid until commits trickle in:
7253                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7254                 } else {
7255                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7256                 }
7257                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7258         }
7259
7260         # contents
7261         for (my $i = 0; $i <= $#commitlist; $i++) {
7262                 my %co = %{$commitlist[$i]};
7263                 my $commit = $co{'id'};
7264                 # we read 150, we always show 30 and the ones more recent than 48 hours
7265                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7266                         last;
7267                 }
7268                 my %cd = parse_date($co{'author_epoch'});
7269
7270                 # get list of changed files
7271                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7272                         $co{'parent'} || "--root",
7273                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7274                         or next;
7275                 my @difftree = map { chomp; $_ } <$fd>;
7276                 close $fd
7277                         or next;
7278
7279                 # print element (entry, item)
7280                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7281                 if ($format eq 'rss') {
7282                         print "<item>\n" .
7283                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7284                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7285                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7286                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7287                               "<link>$co_url</link>\n" .
7288                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7289                               "<content:encoded>" .
7290                               "<![CDATA[\n";
7291                 } elsif ($format eq 'atom') {
7292                         print "<entry>\n" .
7293                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7294                               "<updated>$cd{'iso-8601'}</updated>\n" .
7295                               "<author>\n" .
7296                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7297                         if ($co{'author_email'}) {
7298                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7299                         }
7300                         print "</author>\n" .
7301                               # use committer for contributor
7302                               "<contributor>\n" .
7303                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7304                         if ($co{'committer_email'}) {
7305                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7306                         }
7307                         print "</contributor>\n" .
7308                               "<published>$cd{'iso-8601'}</published>\n" .
7309                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7310                               "<id>$co_url</id>\n" .
7311                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7312                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7313                 }
7314                 my $comment = $co{'comment'};
7315                 print "<pre>\n";
7316                 foreach my $line (@$comment) {
7317                         $line = esc_html($line);
7318                         print "$line\n";
7319                 }
7320                 print "</pre><ul>\n";
7321                 foreach my $difftree_line (@difftree) {
7322                         my %difftree = parse_difftree_raw_line($difftree_line);
7323                         next if !$difftree{'from_id'};
7324
7325                         my $file = $difftree{'file'} || $difftree{'to_file'};
7326
7327                         print "<li>" .
7328                               "[" .
7329                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7330                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7331                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7332                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7333                                       -title => "diff"}, 'D');
7334                         if ($have_blame) {
7335                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7336                                                              file_name=>$file, hash_base=>$commit),
7337                                               -title => "blame"}, 'B');
7338                         }
7339                         # if this is not a feed of a file history
7340                         if (!defined $file_name || $file_name ne $file) {
7341                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7342                                                              file_name=>$file, hash=>$commit),
7343                                               -title => "history"}, 'H');
7344                         }
7345                         $file = esc_path($file);
7346                         print "] ".
7347                               "$file</li>\n";
7348                 }
7349                 if ($format eq 'rss') {
7350                         print "</ul>]]>\n" .
7351                               "</content:encoded>\n" .
7352                               "</item>\n";
7353                 } elsif ($format eq 'atom') {
7354                         print "</ul>\n</div>\n" .
7355                               "</content>\n" .
7356                               "</entry>\n";
7357                 }
7358         }
7359
7360         # end of feed
7361         if ($format eq 'rss') {
7362                 print "</channel>\n</rss>\n";
7363         } elsif ($format eq 'atom') {
7364                 print "</feed>\n";
7365         }
7366 }
7367
7368 sub git_rss {
7369         git_feed('rss');
7370 }
7371
7372 sub git_atom {
7373         git_feed('atom');
7374 }
7375
7376 sub git_opml {
7377         my @list = git_get_projects_list();
7378
7379         print $cgi->header(
7380                 -type => 'text/xml',
7381                 -charset => 'utf-8',
7382                 -content_disposition => 'inline; filename="opml.xml"');
7383
7384         print <<XML;
7385 <?xml version="1.0" encoding="utf-8"?>
7386 <opml version="1.0">
7387 <head>
7388   <title>$site_name OPML Export</title>
7389 </head>
7390 <body>
7391 <outline text="git RSS feeds">
7392 XML
7393
7394         foreach my $pr (@list) {
7395                 my %proj = %$pr;
7396                 my $head = git_get_head_hash($proj{'path'});
7397                 if (!defined $head) {
7398                         next;
7399                 }
7400                 $git_dir = "$projectroot/$proj{'path'}";
7401                 my %co = parse_commit($head);
7402                 if (!%co) {
7403                         next;
7404                 }
7405
7406                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7407                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7408                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7409                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7410         }
7411         print <<XML;
7412 </outline>
7413 </body>
7414 </opml>
7415 XML
7416 }