gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13
  14 use File::Spec;
  15 # __DIR__ is taken from Dir::Self __DIR__ fragment
  16 sub __DIR__ () {
  17         File::Spec->rel2abs(join '', (File::Spec->splitpath(__FILE__))[0, 1]);
  18 }
  19 use lib __DIR__ . '/lib';
  20
  21 use CGI qw(:standard :escapeHTML -nosticky);
  22 use CGI::Util qw(unescape);
  23 use CGI::Carp qw(fatalsToBrowser set_message);
  24 use Encode;
  25 use Fcntl qw(:mode :flock);
  26 use File::Find qw();
  27 use File::Basename qw(basename);
  28 binmode STDOUT, ':utf8';
  29
  30 our $t0;
  31 if (eval { require Time::HiRes; 1; }) {
  32         $t0 = [Time::HiRes::gettimeofday()];
  33 }
  34 our $number_of_git_cmds = 0;
  35
  36 BEGIN {
  37         CGI->compile() if $ENV{'MOD_PERL'};
  38 }
  39
  40 our $version = "++GIT_VERSION++";
  41
  42 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  43 sub evaluate_uri {
  44         our $cgi;
  45
  46         our $my_url = $cgi->url();
  47         our $my_uri = $cgi->url(-absolute => 1);
  48
  49         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  50         # needed and used only for URLs with nonempty PATH_INFO
  51         our $base_url = $my_url;
  52
  53         # When the script is used as DirectoryIndex, the URL does not contain the name
  54         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  55         # have to do it ourselves. We make $path_info global because it's also used
  56         # later on.
  57         #
  58         # Another issue with the script being the DirectoryIndex is that the resulting
  59         # $my_url data is not the full script URL: this is good, because we want
  60         # generated links to keep implying the script name if it wasn't explicitly
  61         # indicated in the URL we're handling, but it means that $my_url cannot be used
  62         # as base URL.
  63         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  64         # to build the base URL ourselves:
  65         our $path_info = $ENV{"PATH_INFO"};
  66         if ($path_info) {
  67                 if ($my_url =~ s,\Q$path_info\E$,, &&
  68                     $my_uri =~ s,\Q$path_info\E$,, &&
  69                     defined $ENV{'SCRIPT_NAME'}) {
  70                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  71                 }
  72         }
  73
  74         # target of the home link on top of all pages
  75         our $home_link = $my_uri || "/";
  76 }
  77
  78 # core git executable to use
  79 # this can just be "git" if your webserver has a sensible PATH
  80 our $GIT = "++GIT_BINDIR++/git";
  81
  82 # absolute fs-path which will be prepended to the project path
  83 #our $projectroot = "/pub/scm";
  84 our $projectroot = "++GITWEB_PROJECTROOT++";
  85
  86 # fs traversing limit for getting project list
  87 # the number is relative to the projectroot
  88 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  89
  90 # string of the home link on top of all pages
  91 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  92
  93 # name of your site or organization to appear in page titles
  94 # replace this with something more descriptive for clearer bookmarks
  95 our $site_name = "++GITWEB_SITENAME++"
  96                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  97
  98 # filename of html text to include at top of each page
  99 our $site_header = "++GITWEB_SITE_HEADER++";
 100 # html text to include at home page
 101 our $home_text = "++GITWEB_HOMETEXT++";
 102 # filename of html text to include at bottom of each page
 103 our $site_footer = "++GITWEB_SITE_FOOTER++";
 104
 105 # URI of stylesheets
 106 our @stylesheets = ("++GITWEB_CSS++");
 107 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 108 our $stylesheet = undef;
 109 # URI of GIT logo (72x27 size)
 110 our $logo = "++GITWEB_LOGO++";
 111 # URI of GIT favicon, assumed to be image/png type
 112 our $favicon = "++GITWEB_FAVICON++";
 113 # URI of gitweb.js (JavaScript code for gitweb)
 114 our $javascript = "++GITWEB_JS++";
 115
 116 # URI and label (title) of GIT logo link
 117 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 118 #our $logo_label = "git documentation";
 119 our $logo_url = "http://git-scm.com/";
 120 our $logo_label = "git homepage";
 121
 122 # source of projects list
 123 our $projects_list = "++GITWEB_LIST++";
 124
 125 # the width (in characters) of the projects list "Description" column
 126 our $projects_list_description_width = 25;
 127
 128 # default order of projects list
 129 # valid values are none, project, descr, owner, and age
 130 our $default_projects_order = "project";
 131
 132 # show repository only if this file exists
 133 # (only effective if this variable evaluates to true)
 134 our $export_ok = "++GITWEB_EXPORT_OK++";
 135
 136 # show repository only if this subroutine returns true
 137 # when given the path to the project, for example:
 138 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 139 our $export_auth_hook = undef;
 140
 141 # only allow viewing of repositories also shown on the overview page
 142 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 143
 144 # list of git base URLs used for URL to where fetch project from,
 145 # i.e. full URL is "$git_base_url/$project"
 146 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 147
 148 # default blob_plain mimetype and default charset for text/plain blob
 149 our $default_blob_plain_mimetype = 'text/plain';
 150 our $default_text_plain_charset  = undef;
 151
 152 # file to use for guessing MIME types before trying /etc/mime.types
 153 # (relative to the current git repository)
 154 our $mimetypes_file = undef;
 155
 156 # assume this charset if line contains non-UTF-8 characters;
 157 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 158 # for which encoding all byte sequences are valid, for example
 159 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 160 # could be even 'utf-8' for the old behavior)
 161 our $fallback_encoding = 'latin1';
 162
 163 # rename detection options for git-diff and git-diff-tree
 164 # - default is '-M', with the cost proportional to
 165 #   (number of removed files) * (number of new files).
 166 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 167 #   (number of changed files + number of removed files) * (number of new files)
 168 # - even more costly is '-C', '--find-copies-harder' with cost
 169 #   (number of files in the original tree) * (number of new files)
 170 # - one might want to include '-B' option, e.g. '-B', '-M'
 171 our @diff_opts = ('-M'); # taken from git_commit
 172
 173 # Disables features that would allow repository owners to inject script into
 174 # the gitweb domain.
 175 our $prevent_xss = 0;
 176
 177 # Path to the highlight executable to use (must be the one from
 178 # http://www.andre-simon.de due to assumptions about parameters and output).
 179 # Useful if highlight is not installed on your webserver's PATH.
 180 # [Default: highlight]
 181 our $highlight_bin = "++HIGHLIGHT_BIN++";
 182
 183 # information about snapshot formats that gitweb is capable of serving
 184 our %known_snapshot_formats = (
 185         # name => {
 186         #       'display' => display name,
 187         #       'type' => mime type,
 188         #       'suffix' => filename suffix,
 189         #       'format' => --format for git-archive,
 190         #       'compressor' => [compressor command and arguments]
 191         #                       (array reference, optional)
 192         #       'disabled' => boolean (optional)}
 193         #
 194         'tgz' => {
 195                 'display' => 'tar.gz',
 196                 'type' => 'application/x-gzip',
 197                 'suffix' => '.tar.gz',
 198                 'format' => 'tar',
 199                 'compressor' => ['gzip']},
 200
 201         'tbz2' => {
 202                 'display' => 'tar.bz2',
 203                 'type' => 'application/x-bzip2',
 204                 'suffix' => '.tar.bz2',
 205                 'format' => 'tar',
 206                 'compressor' => ['bzip2']},
 207
 208         'txz' => {
 209                 'display' => 'tar.xz',
 210                 'type' => 'application/x-xz',
 211                 'suffix' => '.tar.xz',
 212                 'format' => 'tar',
 213                 'compressor' => ['xz'],
 214                 'disabled' => 1},
 215
 216         'zip' => {
 217                 'display' => 'zip',
 218                 'type' => 'application/x-zip',
 219                 'suffix' => '.zip',
 220                 'format' => 'zip'},
 221 );
 222
 223 # Aliases so we understand old gitweb.snapshot values in repository
 224 # configuration.
 225 our %known_snapshot_format_aliases = (
 226         'gzip'  => 'tgz',
 227         'bzip2' => 'tbz2',
 228         'xz'    => 'txz',
 229
 230         # backward compatibility: legacy gitweb config support
 231         'x-gzip' => undef, 'gz' => undef,
 232         'x-bzip2' => undef, 'bz2' => undef,
 233         'x-zip' => undef, '' => undef,
 234 );
 235
 236 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 237 # are changed, it may be appropriate to change these values too via
 238 # $GITWEB_CONFIG.
 239 our %avatar_size = (
 240         'default' => 16,
 241         'double'  => 32
 242 );
 243
 244 # Used to set the maximum load that we will still respond to gitweb queries.
 245 # If server load exceed this value then return "503 server busy" error.
 246 # If gitweb cannot determined server load, it is taken to be 0.
 247 # Leave it undefined (or set to 'undef') to turn off load checking.
 248 our $maxload = 300;
 249
 250 # configuration for 'highlight' (http://www.andre-simon.de/)
 251 # match by basename
 252 our %highlight_basename = (
 253         #'Program' => 'py',
 254         #'Library' => 'py',
 255         'SConstruct' => 'py', # SCons equivalent of Makefile
 256         'Makefile' => 'make',
 257 );
 258 # match by extension
 259 our %highlight_ext = (
 260         # main extensions, defining name of syntax;
 261         # see files in /usr/share/highlight/langDefs/ directory
 262         map { $_ => $_ }
 263                 qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
 264         # alternate extensions, see /etc/highlight/filetypes.conf
 265         'h' => 'c',
 266         map { $_ => 'cpp' } qw(cxx c++ cc),
 267         map { $_ => 'php' } qw(php3 php4),
 268         map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
 269         'mak' => 'make',
 270         map { $_ => 'xml' } qw(xhtml html htm),
 271 );
 272
 273
 274 # This enables/disables the caching layer in gitweb.  Currently supported
 275 # is only output (response) caching, similar to the one used on git.kernel.org.
 276 our $caching_enabled = 0;
 277 # Set to _initialized_ instance of cache interface implementing (at least)
 278 # get($key) and set($key, $data) methods (Cache::Cache and CHI interfaces),
 279 # or to name of class of cache interface implementing said methods.
 280 # If unset, GitwebCache::FileCacheWithLocking would be used, which is 'dumb'
 281 # (but fast) file based caching layer, currently without any support for
 282 # cache size limiting.  It is therefore recommended that the cache directory
 283 # be periodically completely deleted; this operation is safe to perform.
 284 # Suggested mechanism:
 285 # mv $cachedir $cachedir.flush && mkdir $cachedir && rm -rf $cachedir.flush
 286 our $cache;
 287 # You define site-wide cache options defaults here; override them with
 288 # $GITWEB_CONFIG as necessary.
 289 our %cache_options = (
 290         # The location in the filesystem that will hold the root of the cache.
 291         # This directory will be created as needed (if possible) on the first
 292         # cache set.  Note that either this directory must exists and web server
 293         # has to have write permissions to it, or web server must be able to
 294         # create this directory.
 295         # Possible values:
 296         # * 'cache' (relative to gitweb),
 297         # * File::Spec->catdir(File::Spec->tmpdir(), 'gitweb-cache'),
 298         # * '/var/cache/gitweb' (FHS compliant, requires being set up),
 299         'cache_root' => 'cache',
 300
 301         # The number of subdirectories deep to cache object item.  This should be
 302         # large enough that no cache directory has more than a few hundred
 303         # objects.  Each non-leaf directory contains up to 256 subdirectories
 304         # (00-ff).  Must be larger than 0.
 305         'cache_depth' => 1,
 306
 307         # The (global) minimum expiration time for objects placed in the cache,
 308         # in seconds.  If the dynamic adaptive cache exporation time is lower
 309         # than this number, we set cache timeout to this minimum.
 310         'expires_min' => 20,   # 20 seconds
 311
 312         # The (global) maximum expiration time for dynamic (adaptive) caching
 313         # algorithm, in seconds.  If the adaptive cache lifetime exceeds this
 314         # number, we set cache timeout to this maximum.
 315         # (If 'expires_min' >= 'expires_max', there is no adaptive cache timeout,
 316         # and 'expires_min' is used as expiration time for objects in cache.)
 317         'expires_max' => 1200, # 20 minutes
 318
 319         # Cache lifetime will be increased by applying this factor to the result
 320         # from 'check_load' callback (see below).
 321         'expires_factor' => 60, # expire time in seconds for 1.0 (100% CPU) load
 322
 323         # User supplied callback for deciding the cache policy, usually system
 324         # load.  Multiplied by 'expires_factor' gives adaptive expiration time,
 325         # in seconds, subject to the limits imposed by 'expires_min' and
 326         # 'expires_max' bounds.  Set to undef (or delete) to turn off dynamic
 327         # lifetime control.
 328         # (Compatibile with Cache::Adaptive.)
 329         'check_load' => \&get_loadavg,
 330
 331         # Maximum cache file life, in seconds.  If cache entry lifetime exceeds
 332         # this value, it wouldn't be served as being too stale when waiting for
 333         # cache to be regenerated/refreshed, instead of trying to display
 334         # existing cache date.
 335         # Set it to -1 to always serve existing data if it exists,
 336         # set it to 0 to turn off serving stale data - always wait.
 337         'max_lifetime' => 5*60*60, # 5 hours
 338
 339         # This enables/disables background caching.  If it is set to true value,
 340         # caching engine would return stale data (if it is not older than
 341         # 'max_lifetime' seconds) if it exists, and launch process if regenerating
 342         # (refreshing) cache into the background.  If it is set to false value,
 343         # the process that fills cache must always wait for data to be generated.
 344         # In theory this will make gitweb seem more responsive at the price of
 345         # serving possibly stale data.
 346         'background_cache' => 1,
 347
 348         # Subroutine which would be called when gitweb has to wait for data to
 349         # be generated (it can't serve stale data because there isn't any,
 350         # or if it exists it is older than 'max_lifetime').  The default
 351         # is to use git_generating_data_html(), which creates "Generating..."
 352         # page, which would then redirect or redraw/rewrite the page when
 353         # data is ready.
 354         # Set it to `undef' to disable this feature.
 355         #
 356         # Such subroutine (if invoked from GitwebCache::SimpleFileCache)
 357         # is passed the following parameters: $cache instance, human-readable
 358         # $key to current page, and filehandle $lock_fh to lockfile.
 359         'generating_info' => \&git_generating_data_html,
 360
 361         # This enables/disables using 'generating_info' subroutine by process
 362         # generating data, when not too stale data is not available (data is then
 363         # generated in background).  Because git_generating_data_html() includes
 364         # initial delay (of 1 second by default), and we can assume that die_error
 365         # finishes within this time, then generating error pages should be safe
 366         # from infinite "Generating page..." loop.
 367         'generating_info_is_safe' => 1,
 368 );
 369 # You define site-wide options for "Generating..." page (if enabled) here
 370 # (which means that $cache_options{'generating_info'} is set to coderef);
 371 # override them with $GITWEB_CONFIG as necessary.
 372 our %generating_options = (
 373         # The delay before displaying "Generating..." page, in seconds.  It is
 374         # intended for "Generating..." page to be shown only when really needed.
 375         'startup_delay' => 1,
 376         # The time between generating new piece of output to prevent from
 377         # redirection before data is ready, i.e. time between printing each
 378         # dot in activity indicator / progress info, in seconds.
 379         'print_interval' => 2,
 380         # Maximum time "Generating..." page would be present, waiting for data,
 381         # before unconditional redirect, in seconds.
 382         'timeout' => $cache_options{'expires_min'},
 383 );
 384 # Set to _initialized_ instance of GitwebCache::Capture compatibile capturing
 385 # engine, i.e. one implementing ->new() constructor, and ->capture($code)
 386 # method.  If unset (default), the GitwebCache::Capture::Simple would be used.
 387 our $capture;
 388
 389 # You define site-wide feature defaults here; override them with
 390 # $GITWEB_CONFIG as necessary.
 391 our %feature = (
 392         # feature => {
 393         #       'sub' => feature-sub (subroutine),
 394         #       'override' => allow-override (boolean),
 395         #       'default' => [ default options...] (array reference)}
 396         #
 397         # if feature is overridable (it means that allow-override has true value),
 398         # then feature-sub will be called with default options as parameters;
 399         # return value of feature-sub indicates if to enable specified feature
 400         #
 401         # if there is no 'sub' key (no feature-sub), then feature cannot be
 402         # overridden
 403         #
 404         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 405         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 406         # is enabled
 407
 408         # Enable the 'blame' blob view, showing the last commit that modified
 409         # each line in the file. This can be very CPU-intensive.
 410
 411         # To enable system wide have in $GITWEB_CONFIG
 412         # $feature{'blame'}{'default'} = [1];
 413         # To have project specific config enable override in $GITWEB_CONFIG
 414         # $feature{'blame'}{'override'} = 1;
 415         # and in project config gitweb.blame = 0|1;
 416         'blame' => {
 417                 'sub' => sub { feature_bool('blame', @_) },
 418                 'override' => 0,
 419                 'default' => [0]},
 420
 421         # Enable the 'snapshot' link, providing a compressed archive of any
 422         # tree. This can potentially generate high traffic if you have large
 423         # project.
 424
 425         # Value is a list of formats defined in %known_snapshot_formats that
 426         # you wish to offer.
 427         # To disable system wide have in $GITWEB_CONFIG
 428         # $feature{'snapshot'}{'default'} = [];
 429         # To have project specific config enable override in $GITWEB_CONFIG
 430         # $feature{'snapshot'}{'override'} = 1;
 431         # and in project config, a comma-separated list of formats or "none"
 432         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 433         'snapshot' => {
 434                 'sub' => \&feature_snapshot,
 435                 'override' => 0,
 436                 'default' => ['tgz']},
 437
 438         # Enable text search, which will list the commits which match author,
 439         # committer or commit text to a given string.  Enabled by default.
 440         # Project specific override is not supported.
 441         'search' => {
 442                 'override' => 0,
 443                 'default' => [1]},
 444
 445         # Enable grep search, which will list the files in currently selected
 446         # tree containing the given string. Enabled by default. This can be
 447         # potentially CPU-intensive, of course.
 448
 449         # To enable system wide have in $GITWEB_CONFIG
 450         # $feature{'grep'}{'default'} = [1];
 451         # To have project specific config enable override in $GITWEB_CONFIG
 452         # $feature{'grep'}{'override'} = 1;
 453         # and in project config gitweb.grep = 0|1;
 454         'grep' => {
 455                 'sub' => sub { feature_bool('grep', @_) },
 456                 'override' => 0,
 457                 'default' => [1]},
 458
 459         # Enable the pickaxe search, which will list the commits that modified
 460         # a given string in a file. This can be practical and quite faster
 461         # alternative to 'blame', but still potentially CPU-intensive.
 462
 463         # To enable system wide have in $GITWEB_CONFIG
 464         # $feature{'pickaxe'}{'default'} = [1];
 465         # To have project specific config enable override in $GITWEB_CONFIG
 466         # $feature{'pickaxe'}{'override'} = 1;
 467         # and in project config gitweb.pickaxe = 0|1;
 468         'pickaxe' => {
 469                 'sub' => sub { feature_bool('pickaxe', @_) },
 470                 'override' => 0,
 471                 'default' => [1]},
 472
 473         # Enable showing size of blobs in a 'tree' view, in a separate
 474         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 475
 476         # To disable system wide have in $GITWEB_CONFIG
 477         # $feature{'show-sizes'}{'default'} = [0];
 478         # To have project specific config enable override in $GITWEB_CONFIG
 479         # $feature{'show-sizes'}{'override'} = 1;
 480         # and in project config gitweb.showsizes = 0|1;
 481         'show-sizes' => {
 482                 'sub' => sub { feature_bool('showsizes', @_) },
 483                 'override' => 0,
 484                 'default' => [1]},
 485
 486         # Make gitweb use an alternative format of the URLs which can be
 487         # more readable and natural-looking: project name is embedded
 488         # directly in the path and the query string contains other
 489         # auxiliary information. All gitweb installations recognize
 490         # URL in either format; this configures in which formats gitweb
 491         # generates links.
 492
 493         # To enable system wide have in $GITWEB_CONFIG
 494         # $feature{'pathinfo'}{'default'} = [1];
 495         # Project specific override is not supported.
 496
 497         # Note that you will need to change the default location of CSS,
 498         # favicon, logo and possibly other files to an absolute URL. Also,
 499         # if gitweb.cgi serves as your indexfile, you will need to force
 500         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 501         'pathinfo' => {
 502                 'override' => 0,
 503                 'default' => [0]},
 504
 505         # Make gitweb consider projects in project root subdirectories
 506         # to be forks of existing projects. Given project $projname.git,
 507         # projects matching $projname/*.git will not be shown in the main
 508         # projects list, instead a '+' mark will be added to $projname
 509         # there and a 'forks' view will be enabled for the project, listing
 510         # all the forks. If project list is taken from a file, forks have
 511         # to be listed after the main project.
 512
 513         # To enable system wide have in $GITWEB_CONFIG
 514         # $feature{'forks'}{'default'} = [1];
 515         # Project specific override is not supported.
 516         'forks' => {
 517                 'override' => 0,
 518                 'default' => [0]},
 519
 520         # Insert custom links to the action bar of all project pages.
 521         # This enables you mainly to link to third-party scripts integrating
 522         # into gitweb; e.g. git-browser for graphical history representation
 523         # or custom web-based repository administration interface.
 524
 525         # The 'default' value consists of a list of triplets in the form
 526         # (label, link, position) where position is the label after which
 527         # to insert the link and link is a format string where %n expands
 528         # to the project name, %f to the project path within the filesystem,
 529         # %h to the current hash (h gitweb parameter) and %b to the current
 530         # hash base (hb gitweb parameter); %% expands to %.
 531
 532         # To enable system wide have in $GITWEB_CONFIG e.g.
 533         # $feature{'actions'}{'default'} = [('graphiclog',
 534         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 535         # Project specific override is not supported.
 536         'actions' => {
 537                 'override' => 0,
 538                 'default' => []},
 539
 540         # Allow gitweb scan project content tags described in ctags/
 541         # of project repository, and display the popular Web 2.0-ish
 542         # "tag cloud" near the project list. Note that this is something
 543         # COMPLETELY different from the normal Git tags.
 544
 545         # gitweb by itself can show existing tags, but it does not handle
 546         # tagging itself; you need an external application for that.
 547         # For an example script, check Girocco's cgi/tagproj.cgi.
 548         # You may want to install the HTML::TagCloud Perl module to get
 549         # a pretty tag cloud instead of just a list of tags.
 550
 551         # To enable system wide have in $GITWEB_CONFIG
 552         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 553         # Project specific override is not supported.
 554         'ctags' => {
 555                 'override' => 0,
 556                 'default' => [0]},
 557
 558         # The maximum number of patches in a patchset generated in patch
 559         # view. Set this to 0 or undef to disable patch view, or to a
 560         # negative number to remove any limit.
 561
 562         # To disable system wide have in $GITWEB_CONFIG
 563         # $feature{'patches'}{'default'} = [0];
 564         # To have project specific config enable override in $GITWEB_CONFIG
 565         # $feature{'patches'}{'override'} = 1;
 566         # and in project config gitweb.patches = 0|n;
 567         # where n is the maximum number of patches allowed in a patchset.
 568         'patches' => {
 569                 'sub' => \&feature_patches,
 570                 'override' => 0,
 571                 'default' => [16]},
 572
 573         # Avatar support. When this feature is enabled, views such as
 574         # shortlog or commit will display an avatar associated with
 575         # the email of the committer(s) and/or author(s).
 576
 577         # Currently available providers are gravatar and picon.
 578         # If an unknown provider is specified, the feature is disabled.
 579
 580         # Gravatar depends on Digest::MD5.
 581         # Picon currently relies on the indiana.edu database.
 582
 583         # To enable system wide have in $GITWEB_CONFIG
 584         # $feature{'avatar'}{'default'} = ['<provider>'];
 585         # where <provider> is either gravatar or picon.
 586         # To have project specific config enable override in $GITWEB_CONFIG
 587         # $feature{'avatar'}{'override'} = 1;
 588         # and in project config gitweb.avatar = <provider>;
 589         'avatar' => {
 590                 'sub' => \&feature_avatar,
 591                 'override' => 0,
 592                 'default' => ['']},
 593
 594         # Enable displaying how much time and how many git commands
 595         # it took to generate and display page.  Disabled by default.
 596         # Project specific override is not supported.
 597         'timed' => {
 598                 'override' => 0,
 599                 'default' => [0]},
 600
 601         # Enable turning some links into links to actions which require
 602         # JavaScript to run (like 'blame_incremental').  Not enabled by
 603         # default.  Project specific override is currently not supported.
 604         'javascript-actions' => {
 605                 'override' => 0,
 606                 'default' => [0]},
 607
 608         # Syntax highlighting support. This is based on Daniel Svensson's
 609         # and Sham Chukoury's work in gitweb-xmms2.git.
 610         # It requires the 'highlight' program present in $PATH,
 611         # and therefore is disabled by default.
 612
 613         # To enable system wide have in $GITWEB_CONFIG
 614         # $feature{'highlight'}{'default'} = [1];
 615
 616         'highlight' => {
 617                 'sub' => sub { feature_bool('highlight', @_) },
 618                 'override' => 0,
 619                 'default' => [0]},
 620 );
 621
 622 sub gitweb_get_feature {
 623         my ($name) = @_;
 624         return unless exists $feature{$name};
 625         my ($sub, $override, @defaults) = (
 626                 $feature{$name}{'sub'},
 627                 $feature{$name}{'override'},
 628                 @{$feature{$name}{'default'}});
 629         # project specific override is possible only if we have project
 630         our $git_dir; # global variable, declared later
 631         if (!$override || !defined $git_dir) {
 632                 return @defaults;
 633         }
 634         if (!defined $sub) {
 635                 warn "feature $name is not overridable";
 636                 return @defaults;
 637         }
 638         return $sub->(@defaults);
 639 }
 640
 641 # A wrapper to check if a given feature is enabled.
 642 # With this, you can say
 643 #
 644 #   my $bool_feat = gitweb_check_feature('bool_feat');
 645 #   gitweb_check_feature('bool_feat') or somecode;
 646 #
 647 # instead of
 648 #
 649 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 650 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 651 #
 652 sub gitweb_check_feature {
 653         return (gitweb_get_feature(@_))[0];
 654 }
 655
 656
 657 sub feature_bool {
 658         my $key = shift;
 659         my ($val) = git_get_project_config($key, '--bool');
 660
 661         if (!defined $val) {
 662                 return ($_[0]);
 663         } elsif ($val eq 'true') {
 664                 return (1);
 665         } elsif ($val eq 'false') {
 666                 return (0);
 667         }
 668 }
 669
 670 sub feature_snapshot {
 671         my (@fmts) = @_;
 672
 673         my ($val) = git_get_project_config('snapshot');
 674
 675         if ($val) {
 676                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 677         }
 678
 679         return @fmts;
 680 }
 681
 682 sub feature_patches {
 683         my @val = (git_get_project_config('patches', '--int'));
 684
 685         if (@val) {
 686                 return @val;
 687         }
 688
 689         return ($_[0]);
 690 }
 691
 692 sub feature_avatar {
 693         my @val = (git_get_project_config('avatar'));
 694
 695         return @val ? @val : @_;
 696 }
 697
 698 # checking HEAD file with -e is fragile if the repository was
 699 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 700 # and then pruned.
 701 sub check_head_link {
 702         my ($dir) = @_;
 703         my $headfile = "$dir/HEAD";
 704         return ((-e $headfile) ||
 705                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 706 }
 707
 708 sub check_export_ok {
 709         my ($dir) = @_;
 710         return (check_head_link($dir) &&
 711                 (!$export_ok || -e "$dir/$export_ok") &&
 712                 (!$export_auth_hook || $export_auth_hook->($dir)));
 713 }
 714
 715 # process alternate names for backward compatibility
 716 # filter out unsupported (unknown) snapshot formats
 717 sub filter_snapshot_fmts {
 718         my @fmts = @_;
 719
 720         @fmts = map {
 721                 exists $known_snapshot_format_aliases{$_} ?
 722                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 723         @fmts = grep {
 724                 exists $known_snapshot_formats{$_} &&
 725                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 726 }
 727
 728 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 729 sub evaluate_gitweb_config {
 730         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 731         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 732         # die if there are errors parsing config file
 733         if (-e $GITWEB_CONFIG) {
 734                 do $GITWEB_CONFIG;
 735                 die $@ if $@;
 736         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 737                 do $GITWEB_CONFIG_SYSTEM;
 738                 die $@ if $@;
 739         }
 740 }
 741
 742 # Get loadavg of system, to compare against $maxload.
 743 # Currently it requires '/proc/loadavg' present to get loadavg;
 744 # if it is not present it returns 0, which means no load checking.
 745 sub get_loadavg {
 746         if( -e '/proc/loadavg' ){
 747                 open my $fd, '<', '/proc/loadavg'
 748                         or return 0;
 749                 my @load = split(/\s+/, scalar <$fd>);
 750                 close $fd;
 751
 752                 # The first three columns measure CPU and IO utilization of the last one,
 753                 # five, and 10 minute periods.  The fourth column shows the number of
 754                 # currently running processes and the total number of processes in the m/n
 755                 # format.  The last column displays the last process ID used.
 756                 return $load[0] || 0;
 757         }
 758         # additional checks for load average should go here for things that don't export
 759         # /proc/loadavg
 760
 761         return 0;
 762 }
 763
 764 # version of the core git binary
 765 our $git_version;
 766 sub evaluate_git_version {
 767         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 768         $number_of_git_cmds++;
 769 }
 770
 771 sub check_loadavg {
 772         if (defined $maxload && get_loadavg() > $maxload) {
 773                 die_error(503, "The load average on the server is too high");
 774         }
 775 }
 776
 777 # ======================================================================
 778 # input validation and dispatch
 779
 780 # input parameters can be collected from a variety of sources (presently, CGI
 781 # and PATH_INFO), so we define an %input_params hash that collects them all
 782 # together during validation: this allows subsequent uses (e.g. href()) to be
 783 # agnostic of the parameter origin
 784
 785 our %input_params = ();
 786
 787 # input parameters are stored with the long parameter name as key. This will
 788 # also be used in the href subroutine to convert parameters to their CGI
 789 # equivalent, and since the href() usage is the most frequent one, we store
 790 # the name -> CGI key mapping here, instead of the reverse.
 791 #
 792 # XXX: Warning: If you touch this, check the search form for updating,
 793 # too.
 794
 795 our @cgi_param_mapping = (
 796         project => "p",
 797         action => "a",
 798         file_name => "f",
 799         file_parent => "fp",
 800         hash => "h",
 801         hash_parent => "hp",
 802         hash_base => "hb",
 803         hash_parent_base => "hpb",
 804         page => "pg",
 805         order => "o",
 806         searchtext => "s",
 807         searchtype => "st",
 808         snapshot_format => "sf",
 809         extra_options => "opt",
 810         search_use_regexp => "sr",
 811         # this must be last entry (for manipulation from JavaScript)
 812         javascript => "js"
 813 );
 814 our %cgi_param_mapping = @cgi_param_mapping;
 815
 816 # we will also need to know the possible actions, for validation
 817 our %actions = (
 818         "blame" => \&git_blame,
 819         "blame_incremental" => \&git_blame_incremental,
 820         "blame_data" => \&git_blame_data,
 821         "blobdiff" => \&git_blobdiff,
 822         "blobdiff_plain" => \&git_blobdiff_plain,
 823         "blob" => \&git_blob,
 824         "blob_plain" => \&git_blob_plain,
 825         "commitdiff" => \&git_commitdiff,
 826         "commitdiff_plain" => \&git_commitdiff_plain,
 827         "commit" => \&git_commit,
 828         "forks" => \&git_forks,
 829         "heads" => \&git_heads,
 830         "history" => \&git_history,
 831         "log" => \&git_log,
 832         "patch" => \&git_patch,
 833         "patches" => \&git_patches,
 834         "rss" => \&git_rss,
 835         "atom" => \&git_atom,
 836         "search" => \&git_search,
 837         "search_help" => \&git_search_help,
 838         "shortlog" => \&git_shortlog,
 839         "summary" => \&git_summary,
 840         "tag" => \&git_tag,
 841         "tags" => \&git_tags,
 842         "tree" => \&git_tree,
 843         "snapshot" => \&git_snapshot,
 844         "object" => \&git_object,
 845         # those below don't need $project
 846         "opml" => \&git_opml,
 847         "project_list" => \&git_project_list,
 848         "project_index" => \&git_project_index,
 849 );
 850
 851 # finally, we have the hash of allowed extra_options for the commands that
 852 # allow them
 853 our %allowed_options = (
 854         "--no-merges" => [ qw(rss atom log shortlog history) ],
 855 );
 856
 857 our %actions_info = ();
 858 sub evaluate_actions_info {
 859         our %actions_info;
 860         our (%actions);
 861
 862         # unless explicitely stated otherwise, default output format is html
 863         foreach my $action (keys %actions) {
 864                 $actions_info{$action}{'output_format'} = 'html';
 865         }
 866         # list all exceptions; undef means variable (no definite format)
 867         map { $actions_info{$_}{'output_format'} = 'text' }
 868                 qw(commitdiff_plain patch patches project_index blame_data);
 869         map { $actions_info{$_}{'output_format'} = 'xml' }
 870                 qw(rss atom opml); # there are different types (document formats) of XML
 871         map { $actions_info{$_}{'output_format'} = undef }
 872                 qw(blob_plain object);
 873         $actions_info{'snapshot'}{'output_format'} = 'binary';
 874 }
 875
 876 sub action_outputs_html {
 877         my $action = shift;
 878         return $actions_info{$action}{'output_format'} eq 'html';
 879 }
 880
 881 sub browser_is_robot {
 882         return 1 if !exists $ENV{'HTTP_USER_AGENT'}; # gitweb run as script
 883         if (eval { require HTTP::BrowserDetect; }) {
 884                 my $browser = HTTP::BrowserDetect->new();
 885                 return $browser->robot();
 886         }
 887         # fallback on detecting known web browsers
 888         return 0 if ($ENV{'HTTP_USER_AGENT'} =~ /\b(?:Mozilla|Opera|Safari|IE)\b/);
 889         # be conservative; if not sure, assume non-interactive
 890         return 1;
 891 }
 892
 893 # fill %input_params with the CGI parameters. All values except for 'opt'
 894 # should be single values, but opt can be an array. We should probably
 895 # build an array of parameters that can be multi-valued, but since for the time
 896 # being it's only this one, we just single it out
 897 sub evaluate_query_params {
 898         our $cgi;
 899
 900         while (my ($name, $symbol) = each %cgi_param_mapping) {
 901                 if ($symbol eq 'opt') {
 902                         $input_params{$name} = [ $cgi->param($symbol) ];
 903                 } else {
 904                         $input_params{$name} = $cgi->param($symbol);
 905                 }
 906         }
 907 }
 908
 909 # now read PATH_INFO and update the parameter list for missing parameters
 910 sub evaluate_path_info {
 911         return if defined $input_params{'project'};
 912         return if !$path_info;
 913         $path_info =~ s,^/+,,;
 914         return if !$path_info;
 915
 916         # find which part of PATH_INFO is project
 917         my $project = $path_info;
 918         $project =~ s,/+$,,;
 919         while ($project && !check_head_link("$projectroot/$project")) {
 920                 $project =~ s,/*[^/]*$,,;
 921         }
 922         return unless $project;
 923         $input_params{'project'} = $project;
 924
 925         # do not change any parameters if an action is given using the query string
 926         return if $input_params{'action'};
 927         $path_info =~ s,^\Q$project\E/*,,;
 928
 929         # next, check if we have an action
 930         my $action = $path_info;
 931         $action =~ s,/.*$,,;
 932         if (exists $actions{$action}) {
 933                 $path_info =~ s,^$action/*,,;
 934                 $input_params{'action'} = $action;
 935         }
 936
 937         # list of actions that want hash_base instead of hash, but can have no
 938         # pathname (f) parameter
 939         my @wants_base = (
 940                 'tree',
 941                 'history',
 942         );
 943
 944         # we want to catch, among others
 945         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 946         my ($parentrefname, $parentpathname, $refname, $pathname) =
 947                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 948
 949         # first, analyze the 'current' part
 950         if (defined $pathname) {
 951                 # we got "branch:filename" or "branch:dir/"
 952                 # we could use git_get_type(branch:pathname), but:
 953                 # - it needs $git_dir
 954                 # - it does a git() call
 955                 # - the convention of terminating directories with a slash
 956                 #   makes it superfluous
 957                 # - embedding the action in the PATH_INFO would make it even
 958                 #   more superfluous
 959                 $pathname =~ s,^/+,,;
 960                 if (!$pathname || substr($pathname, -1) eq "/") {
 961                         $input_params{'action'} ||= "tree";
 962                         $pathname =~ s,/$,,;
 963                 } else {
 964                         # the default action depends on whether we had parent info
 965                         # or not
 966                         if ($parentrefname) {
 967                                 $input_params{'action'} ||= "blobdiff_plain";
 968                         } else {
 969                                 $input_params{'action'} ||= "blob_plain";
 970                         }
 971                 }
 972                 $input_params{'hash_base'} ||= $refname;
 973                 $input_params{'file_name'} ||= $pathname;
 974         } elsif (defined $refname) {
 975                 # we got "branch". In this case we have to choose if we have to
 976                 # set hash or hash_base.
 977                 #
 978                 # Most of the actions without a pathname only want hash to be
 979                 # set, except for the ones specified in @wants_base that want
 980                 # hash_base instead. It should also be noted that hand-crafted
 981                 # links having 'history' as an action and no pathname or hash
 982                 # set will fail, but that happens regardless of PATH_INFO.
 983                 if (defined $parentrefname) {
 984                         # if there is parent let the default be 'shortlog' action
 985                         # (for http://git.example.com/repo.git/A..B links); if there
 986                         # is no parent, dispatch will detect type of object and set
 987                         # action appropriately if required (if action is not set)
 988                         $input_params{'action'} ||= "shortlog";
 989                 }
 990                 if ($input_params{'action'} &&
 991                     grep { $_ eq $input_params{'action'} } @wants_base) {
 992                         $input_params{'hash_base'} ||= $refname;
 993                 } else {
 994                         $input_params{'hash'} ||= $refname;
 995                 }
 996         }
 997
 998         # next, handle the 'parent' part, if present
 999         if (defined $parentrefname) {
1000                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
1001                 # someproject/blobdiff/oldrev..newrev:/filename
1002                 if ($parentpathname) {
1003                         $parentpathname =~ s,^/+,,;
1004                         $parentpathname =~ s,/$,,;
1005                         $input_params{'file_parent'} ||= $parentpathname;
1006                 } else {
1007                         $input_params{'file_parent'} ||= $input_params{'file_name'};
1008                 }
1009                 # we assume that hash_parent_base is wanted if a path was specified,
1010                 # or if the action wants hash_base instead of hash
1011                 if (defined $input_params{'file_parent'} ||
1012                         grep { $_ eq $input_params{'action'} } @wants_base) {
1013                         $input_params{'hash_parent_base'} ||= $parentrefname;
1014                 } else {
1015                         $input_params{'hash_parent'} ||= $parentrefname;
1016                 }
1017         }
1018
1019         # for the snapshot action, we allow URLs in the form
1020         # $project/snapshot/$hash.ext
1021         # where .ext determines the snapshot and gets removed from the
1022         # passed $refname to provide the $hash.
1023         #
1024         # To be able to tell that $refname includes the format extension, we
1025         # require the following two conditions to be satisfied:
1026         # - the hash input parameter MUST have been set from the $refname part
1027         #   of the URL (i.e. they must be equal)
1028         # - the snapshot format MUST NOT have been defined already (e.g. from
1029         #   CGI parameter sf)
1030         # It's also useless to try any matching unless $refname has a dot,
1031         # so we check for that too
1032         if (defined $input_params{'action'} &&
1033                 $input_params{'action'} eq 'snapshot' &&
1034                 defined $refname && index($refname, '.') != -1 &&
1035                 $refname eq $input_params{'hash'} &&
1036                 !defined $input_params{'snapshot_format'}) {
1037                 # We loop over the known snapshot formats, checking for
1038                 # extensions. Allowed extensions are both the defined suffix
1039                 # (which includes the initial dot already) and the snapshot
1040                 # format key itself, with a prepended dot
1041                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1042                         my $hash = $refname;
1043                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1044                                 next;
1045                         }
1046                         my $sfx = $1;
1047                         # a valid suffix was found, so set the snapshot format
1048                         # and reset the hash parameter
1049                         $input_params{'snapshot_format'} = $fmt;
1050                         $input_params{'hash'} = $hash;
1051                         # we also set the format suffix to the one requested
1052                         # in the URL: this way a request for e.g. .tgz returns
1053                         # a .tgz instead of a .tar.gz
1054                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1055                         last;
1056                 }
1057         }
1058 }
1059
1060 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1061      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1062      $searchtext, $search_regexp);
1063 sub evaluate_and_validate_params {
1064         our $action = $input_params{'action'};
1065         if (defined $action) {
1066                 if (!validate_action($action)) {
1067                         die_error(400, "Invalid action parameter");
1068                 }
1069         }
1070
1071         # parameters which are pathnames
1072         our $project = $input_params{'project'};
1073         if (defined $project) {
1074                 if (!validate_project($project)) {
1075                         undef $project;
1076                         die_error(404, "No such project");
1077                 }
1078         }
1079
1080         our $file_name = $input_params{'file_name'};
1081         if (defined $file_name) {
1082                 if (!validate_pathname($file_name)) {
1083                         die_error(400, "Invalid file parameter");
1084                 }
1085         }
1086
1087         our $file_parent = $input_params{'file_parent'};
1088         if (defined $file_parent) {
1089                 if (!validate_pathname($file_parent)) {
1090                         die_error(400, "Invalid file parent parameter");
1091                 }
1092         }
1093
1094         # parameters which are refnames
1095         our $hash = $input_params{'hash'};
1096         if (defined $hash) {
1097                 if (!validate_refname($hash)) {
1098                         die_error(400, "Invalid hash parameter");
1099                 }
1100         }
1101
1102         our $hash_parent = $input_params{'hash_parent'};
1103         if (defined $hash_parent) {
1104                 if (!validate_refname($hash_parent)) {
1105                         die_error(400, "Invalid hash parent parameter");
1106                 }
1107         }
1108
1109         our $hash_base = $input_params{'hash_base'};
1110         if (defined $hash_base) {
1111                 if (!validate_refname($hash_base)) {
1112                         die_error(400, "Invalid hash base parameter");
1113                 }
1114         }
1115
1116         our @extra_options = @{$input_params{'extra_options'}};
1117         # @extra_options is always defined, since it can only be (currently) set from
1118         # CGI, and $cgi->param() returns the empty array in array context if the param
1119         # is not set
1120         foreach my $opt (@extra_options) {
1121                 if (not exists $allowed_options{$opt}) {
1122                         die_error(400, "Invalid option parameter");
1123                 }
1124                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1125                         die_error(400, "Invalid option parameter for this action");
1126                 }
1127         }
1128
1129         our $hash_parent_base = $input_params{'hash_parent_base'};
1130         if (defined $hash_parent_base) {
1131                 if (!validate_refname($hash_parent_base)) {
1132                         die_error(400, "Invalid hash parent base parameter");
1133                 }
1134         }
1135
1136         # other parameters
1137         our $page = $input_params{'page'};
1138         if (defined $page) {
1139                 if ($page =~ m/[^0-9]/) {
1140                         die_error(400, "Invalid page parameter");
1141                 }
1142         }
1143
1144         our $searchtype = $input_params{'searchtype'};
1145         if (defined $searchtype) {
1146                 if ($searchtype =~ m/[^a-z]/) {
1147                         die_error(400, "Invalid searchtype parameter");
1148                 }
1149         }
1150
1151         our $search_use_regexp = $input_params{'search_use_regexp'};
1152
1153         our $searchtext = $input_params{'searchtext'};
1154         our $search_regexp;
1155         if (defined $searchtext) {
1156                 if (length($searchtext) < 2) {
1157                         die_error(403, "At least two characters are required for search parameter");
1158                 }
1159                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
1160         }
1161 }
1162
1163 # path to the current git repository
1164 our $git_dir;
1165 sub evaluate_git_dir {
1166         our $git_dir = "$projectroot/$project" if $project;
1167 }
1168
1169 our (@snapshot_fmts, $git_avatar);
1170 sub configure_gitweb_features {
1171         # list of supported snapshot formats
1172         our @snapshot_fmts = gitweb_get_feature('snapshot');
1173         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1174
1175         # check that the avatar feature is set to a known provider name,
1176         # and for each provider check if the dependencies are satisfied.
1177         # if the provider name is invalid or the dependencies are not met,
1178         # reset $git_avatar to the empty string.
1179         our ($git_avatar) = gitweb_get_feature('avatar');
1180         if ($git_avatar eq 'gravatar') {
1181                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1182         } elsif ($git_avatar eq 'picon') {
1183                 # no dependencies
1184         } else {
1185                 $git_avatar = '';
1186         }
1187 }
1188
1189 # custom error handler: 'die <message>' is Internal Server Error
1190 sub handle_errors_html {
1191         my $msg = shift; # it is already HTML escaped
1192
1193         # to avoid infinite loop where error occurs in die_error,
1194         # change handler to default handler, disabling handle_errors_html
1195         set_message("Error occured when inside die_error:\n$msg");
1196
1197         # you cannot jump out of die_error when called as error handler;
1198         # the subroutine set via CGI::Carp::set_message is called _after_
1199         # HTTP headers are already written, so it cannot write them itself
1200         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1201 }
1202 set_message(\&handle_errors_html);
1203
1204 # dispatch
1205 sub dispatch {
1206         if (!defined $action) {
1207                 if (defined $hash) {
1208                         $action = git_get_type($hash);
1209                 } elsif (defined $hash_base && defined $file_name) {
1210                         $action = git_get_type("$hash_base:$file_name");
1211                 } elsif (defined $project) {
1212                         $action = 'summary';
1213                 } else {
1214                         $action = 'project_list';
1215                 }
1216         }
1217         if (!defined($actions{$action})) {
1218                 die_error(400, "Unknown action");
1219         }
1220         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1221             !$project) {
1222                 die_error(400, "Project needed");
1223         }
1224
1225         if ($caching_enabled) {
1226                 # human readable key identifying gitweb output
1227                 my $output_key = href(-replay => 1, -full => 1, -path_info => 0);
1228
1229                 cache_output($cache, $capture, $output_key, $actions{$action});
1230         } else {
1231                 $actions{$action}->();
1232         }
1233 }
1234
1235 sub reset_timer {
1236         our $t0 = [Time::HiRes::gettimeofday()]
1237                 if defined $t0;
1238         our $number_of_git_cmds = 0;
1239 }
1240
1241 sub run_request {
1242         reset_timer();
1243
1244         evaluate_uri();
1245         evaluate_gitweb_config();
1246         evaluate_git_version();
1247         check_loadavg();
1248         configure_caching()
1249                 if ($caching_enabled);
1250
1251         # $projectroot and $projects_list might be set in gitweb config file
1252         $projects_list ||= $projectroot;
1253
1254         evaluate_query_params();
1255         evaluate_path_info();
1256         evaluate_and_validate_params();
1257         evaluate_git_dir();
1258
1259         configure_gitweb_features();
1260
1261         dispatch();
1262 }
1263
1264 our $is_last_request = sub { 1 };
1265 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1266 our $CGI = 'CGI';
1267 our $cgi;
1268 sub configure_as_fcgi {
1269         require CGI::Fast;
1270         our $CGI = 'CGI::Fast';
1271
1272         my $request_number = 0;
1273         # let each child service 100 requests
1274         our $is_last_request = sub { ++$request_number > 100 };
1275 }
1276 sub evaluate_argv {
1277         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1278         configure_as_fcgi()
1279                 if $script_name =~ /\.fcgi$/;
1280
1281         return unless (@ARGV);
1282
1283         require Getopt::Long;
1284         Getopt::Long::GetOptions(
1285                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1286                 'nproc|n=i' => sub {
1287                         my ($arg, $val) = @_;
1288                         return unless eval { require FCGI::ProcManager; 1; };
1289                         my $proc_manager = FCGI::ProcManager->new({
1290                                 n_processes => $val,
1291                         });
1292                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1293                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1294                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1295                 },
1296         );
1297 }
1298
1299 sub run {
1300         evaluate_argv();
1301         evaluate_actions_info();
1302
1303         $pre_listen_hook->()
1304                 if $pre_listen_hook;
1305
1306  REQUEST:
1307         while ($cgi = $CGI->new()) {
1308                 $pre_dispatch_hook->()
1309                         if $pre_dispatch_hook;
1310
1311                 run_request();
1312
1313                 $post_dispatch_hook->()
1314                         if $post_dispatch_hook;
1315
1316                 last REQUEST if ($is_last_request->());
1317         }
1318
1319  DONE_GITWEB:
1320         1;
1321 }
1322
1323 sub configure_caching {
1324         if (!eval { require GitwebCache::CacheOutput; 1; }) {
1325                 # cache is configured _before_ handling request, so $cgi is not defined,
1326                 # so we can't just "die" with sending error message to web browser
1327                 #die_error(500, "Caching enabled and GitwebCache::CacheOutput not found");
1328
1329                 # turn off caching and warn instead
1330                 $caching_enabled = 0;
1331                 warn "Caching enabled and GitwebCache::CacheOutput not found";
1332         }
1333         GitwebCache::CacheOutput->import();
1334
1335         # $cache might be initialized (instantiated) cache, i.e. cache object,
1336         # or it might be name of class, or it might be undefined
1337         unless (defined $cache && ref($cache)) {
1338                 $cache ||= 'GitwebCache::FileCacheWithLocking';
1339                 eval "require $cache";
1340                 die $@ if $@;
1341                 $cache = $cache->new({
1342                         %cache_options,
1343                         #'cache_root' => '/tmp/cache',
1344                         #'cache_depth' => 2,
1345                         #'expires_in' => 20, # in seconds (CHI compatibile)
1346                         # (Cache::Cache compatibile initialization)
1347                         'default_expires_in' => $cache_options{'expires_in'},
1348                         # (CHI compatibile initialization)
1349                         'root_dir' => $cache_options{'cache_root'},
1350                         'depth' => $cache_options{'cache_depth'},
1351                 });
1352         }
1353         unless (defined $capture && ref($capture)) {
1354                 require GitwebCache::Capture::Simple;
1355                 $capture = GitwebCache::Capture::Simple->new();
1356         }
1357 }
1358
1359 run();
1360
1361 if (defined caller) {
1362         # wrapped in a subroutine processing requests,
1363         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1364         return;
1365 } else {
1366         # pure CGI script, serving single request
1367         exit;
1368 }
1369
1370 ## ======================================================================
1371 ## action links
1372
1373 # possible values of extra options
1374 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1375 # -replay => 1      - start from a current view (replay with modifications)
1376 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1377 sub href {
1378         my %params = @_;
1379         # default is to use -absolute url() i.e. $my_uri
1380         my $href = $params{-full} ? $my_url : $my_uri;
1381
1382         $params{'project'} = $project unless exists $params{'project'};
1383
1384         if ($params{-replay}) {
1385                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1386                         if (!exists $params{$name}) {
1387                                 $params{$name} = $input_params{$name};
1388                         }
1389                 }
1390         }
1391
1392         my $use_pathinfo = gitweb_check_feature('pathinfo');
1393         if (defined $params{'project'} &&
1394             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1395                 # try to put as many parameters as possible in PATH_INFO:
1396                 #   - project name
1397                 #   - action
1398                 #   - hash_parent or hash_parent_base:/file_parent
1399                 #   - hash or hash_base:/filename
1400                 #   - the snapshot_format as an appropriate suffix
1401
1402                 # When the script is the root DirectoryIndex for the domain,
1403                 # $href here would be something like http://gitweb.example.com/
1404                 # Thus, we strip any trailing / from $href, to spare us double
1405                 # slashes in the final URL
1406                 $href =~ s,/$,,;
1407
1408                 # Then add the project name, if present
1409                 $href .= "/".esc_url($params{'project'});
1410                 delete $params{'project'};
1411
1412                 # since we destructively absorb parameters, we keep this
1413                 # boolean that remembers if we're handling a snapshot
1414                 my $is_snapshot = $params{'action'} eq 'snapshot';
1415
1416                 # Summary just uses the project path URL, any other action is
1417                 # added to the URL
1418                 if (defined $params{'action'}) {
1419                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1420                         delete $params{'action'};
1421                 }
1422
1423                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1424                 # stripping nonexistent or useless pieces
1425                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1426                         || $params{'hash_parent'} || $params{'hash'});
1427                 if (defined $params{'hash_base'}) {
1428                         if (defined $params{'hash_parent_base'}) {
1429                                 $href .= esc_url($params{'hash_parent_base'});
1430                                 # skip the file_parent if it's the same as the file_name
1431                                 if (defined $params{'file_parent'}) {
1432                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1433                                                 delete $params{'file_parent'};
1434                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1435                                                 $href .= ":/".esc_url($params{'file_parent'});
1436                                                 delete $params{'file_parent'};
1437                                         }
1438                                 }
1439                                 $href .= "..";
1440                                 delete $params{'hash_parent'};
1441                                 delete $params{'hash_parent_base'};
1442                         } elsif (defined $params{'hash_parent'}) {
1443                                 $href .= esc_url($params{'hash_parent'}). "..";
1444                                 delete $params{'hash_parent'};
1445                         }
1446
1447                         $href .= esc_url($params{'hash_base'});
1448                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1449                                 $href .= ":/".esc_url($params{'file_name'});
1450                                 delete $params{'file_name'};
1451                         }
1452                         delete $params{'hash'};
1453                         delete $params{'hash_base'};
1454                 } elsif (defined $params{'hash'}) {
1455                         $href .= esc_url($params{'hash'});
1456                         delete $params{'hash'};
1457                 }
1458
1459                 # If the action was a snapshot, we can absorb the
1460                 # snapshot_format parameter too
1461                 if ($is_snapshot) {
1462                         my $fmt = $params{'snapshot_format'};
1463                         # snapshot_format should always be defined when href()
1464                         # is called, but just in case some code forgets, we
1465                         # fall back to the default
1466                         $fmt ||= $snapshot_fmts[0];
1467                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1468                         delete $params{'snapshot_format'};
1469                 }
1470         }
1471
1472         # now encode the parameters explicitly
1473         my @result = ();
1474         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1475                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1476                 if (defined $params{$name}) {
1477                         if (ref($params{$name}) eq "ARRAY") {
1478                                 foreach my $par (@{$params{$name}}) {
1479                                         push @result, $symbol . "=" . esc_param($par);
1480                                 }
1481                         } else {
1482                                 push @result, $symbol . "=" . esc_param($params{$name});
1483                         }
1484                 }
1485         }
1486         $href .= "?" . join(';', @result) if scalar @result;
1487
1488         return $href;
1489 }
1490
1491
1492 ## ======================================================================
1493 ## validation, quoting/unquoting and escaping
1494
1495 sub validate_action {
1496         my $input = shift || return undef;
1497         return undef unless exists $actions{$input};
1498         return $input;
1499 }
1500
1501 sub validate_project {
1502         my $input = shift || return undef;
1503         if (!validate_pathname($input) ||
1504                 !(-d "$projectroot/$input") ||
1505                 !check_export_ok("$projectroot/$input") ||
1506                 ($strict_export && !project_in_list($input))) {
1507                 return undef;
1508         } else {
1509                 return $input;
1510         }
1511 }
1512
1513 sub validate_pathname {
1514         my $input = shift || return undef;
1515
1516         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1517         # at the beginning, at the end, and between slashes.
1518         # also this catches doubled slashes
1519         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1520                 return undef;
1521         }
1522         # no null characters
1523         if ($input =~ m!\0!) {
1524                 return undef;
1525         }
1526         return $input;
1527 }
1528
1529 sub validate_refname {
1530         my $input = shift || return undef;
1531
1532         # textual hashes are O.K.
1533         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1534                 return $input;
1535         }
1536         # it must be correct pathname
1537         $input = validate_pathname($input)
1538                 or return undef;
1539         # restrictions on ref name according to git-check-ref-format
1540         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1541                 return undef;
1542         }
1543         return $input;
1544 }
1545
1546 # decode sequences of octets in utf8 into Perl's internal form,
1547 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1548 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1549 sub to_utf8 {
1550         my $str = shift;
1551         return undef unless defined $str;
1552         if (utf8::valid($str)) {
1553                 utf8::decode($str);
1554                 return $str;
1555         } else {
1556                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1557         }
1558 }
1559
1560 # quote unsafe chars, but keep the slash, even when it's not
1561 # correct, but quoted slashes look too horrible in bookmarks
1562 sub esc_param {
1563         my $str = shift;
1564         return undef unless defined $str;
1565         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1566         $str =~ s/ /\+/g;
1567         return $str;
1568 }
1569
1570 # quote unsafe chars in whole URL, so some characters cannot be quoted
1571 sub esc_url {
1572         my $str = shift;
1573         return undef unless defined $str;
1574         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1575         $str =~ s/ /\+/g;
1576         return $str;
1577 }
1578
1579 # replace invalid utf8 character with SUBSTITUTION sequence
1580 sub esc_html {
1581         my $str = shift;
1582         my %opts = @_;
1583
1584         return undef unless defined $str;
1585
1586         $str = to_utf8($str);
1587         $str = $cgi->escapeHTML($str);
1588         if ($opts{'-nbsp'}) {
1589                 $str =~ s/ /&nbsp;/g;
1590         }
1591         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1592         return $str;
1593 }
1594
1595 # quote control characters and escape filename to HTML
1596 sub esc_path {
1597         my $str = shift;
1598         my %opts = @_;
1599
1600         return undef unless defined $str;
1601
1602         $str = to_utf8($str);
1603         $str = $cgi->escapeHTML($str);
1604         if ($opts{'-nbsp'}) {
1605                 $str =~ s/ /&nbsp;/g;
1606         }
1607         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1608         return $str;
1609 }
1610
1611 # Make control characters "printable", using character escape codes (CEC)
1612 sub quot_cec {
1613         my $cntrl = shift;
1614         my %opts = @_;
1615         my %es = ( # character escape codes, aka escape sequences
1616                 "\t" => '\t',   # tab            (HT)
1617                 "\n" => '\n',   # line feed      (LF)
1618                 "\r" => '\r',   # carrige return (CR)
1619                 "\f" => '\f',   # form feed      (FF)
1620                 "\b" => '\b',   # backspace      (BS)
1621                 "\a" => '\a',   # alarm (bell)   (BEL)
1622                 "\e" => '\e',   # escape         (ESC)
1623                 "\013" => '\v', # vertical tab   (VT)
1624                 "\000" => '\0', # nul character  (NUL)
1625         );
1626         my $chr = ( (exists $es{$cntrl})
1627                     ? $es{$cntrl}
1628                     : sprintf('\%2x', ord($cntrl)) );
1629         if ($opts{-nohtml}) {
1630                 return $chr;
1631         } else {
1632                 return "<span class=\"cntrl\">$chr</span>";
1633         }
1634 }
1635
1636 # Alternatively use unicode control pictures codepoints,
1637 # Unicode "printable representation" (PR)
1638 sub quot_upr {
1639         my $cntrl = shift;
1640         my %opts = @_;
1641
1642         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1643         if ($opts{-nohtml}) {
1644                 return $chr;
1645         } else {
1646                 return "<span class=\"cntrl\">$chr</span>";
1647         }
1648 }
1649
1650 # git may return quoted and escaped filenames
1651 sub unquote {
1652         my $str = shift;
1653
1654         sub unq {
1655                 my $seq = shift;
1656                 my %es = ( # character escape codes, aka escape sequences
1657                         't' => "\t",   # tab            (HT, TAB)
1658                         'n' => "\n",   # newline        (NL)
1659                         'r' => "\r",   # return         (CR)
1660                         'f' => "\f",   # form feed      (FF)
1661                         'b' => "\b",   # backspace      (BS)
1662                         'a' => "\a",   # alarm (bell)   (BEL)
1663                         'e' => "\e",   # escape         (ESC)
1664                         'v' => "\013", # vertical tab   (VT)
1665                 );
1666
1667                 if ($seq =~ m/^[0-7]{1,3}$/) {
1668                         # octal char sequence
1669                         return chr(oct($seq));
1670                 } elsif (exists $es{$seq}) {
1671                         # C escape sequence, aka character escape code
1672                         return $es{$seq};
1673                 }
1674                 # quoted ordinary character
1675                 return $seq;
1676         }
1677
1678         if ($str =~ m/^"(.*)"$/) {
1679                 # needs unquoting
1680                 $str = $1;
1681                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1682         }
1683         return $str;
1684 }
1685
1686 # escape tabs (convert tabs to spaces)
1687 sub untabify {
1688         my $line = shift;
1689
1690         while ((my $pos = index($line, "\t")) != -1) {
1691                 if (my $count = (8 - ($pos % 8))) {
1692                         my $spaces = ' ' x $count;
1693                         $line =~ s/\t/$spaces/;
1694                 }
1695         }
1696
1697         return $line;
1698 }
1699
1700 sub project_in_list {
1701         my $project = shift;
1702         my @list = git_get_projects_list();
1703         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1704 }
1705
1706 ## ----------------------------------------------------------------------
1707 ## HTML aware string manipulation
1708
1709 # Try to chop given string on a word boundary between position
1710 # $len and $len+$add_len. If there is no word boundary there,
1711 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1712 # (marking chopped part) would be longer than given string.
1713 sub chop_str {
1714         my $str = shift;
1715         my $len = shift;
1716         my $add_len = shift || 10;
1717         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1718
1719         # Make sure perl knows it is utf8 encoded so we don't
1720         # cut in the middle of a utf8 multibyte char.
1721         $str = to_utf8($str);
1722
1723         # allow only $len chars, but don't cut a word if it would fit in $add_len
1724         # if it doesn't fit, cut it if it's still longer than the dots we would add
1725         # remove chopped character entities entirely
1726
1727         # when chopping in the middle, distribute $len into left and right part
1728         # return early if chopping wouldn't make string shorter
1729         if ($where eq 'center') {
1730                 return $str if ($len + 5 >= length($str)); # filler is length 5
1731                 $len = int($len/2);
1732         } else {
1733                 return $str if ($len + 4 >= length($str)); # filler is length 4
1734         }
1735
1736         # regexps: ending and beginning with word part up to $add_len
1737         my $endre = qr/.{$len}\w{0,$add_len}/;
1738         my $begre = qr/\w{0,$add_len}.{$len}/;
1739
1740         if ($where eq 'left') {
1741                 $str =~ m/^(.*?)($begre)$/;
1742                 my ($lead, $body) = ($1, $2);
1743                 if (length($lead) > 4) {
1744                         $lead = " ...";
1745                 }
1746                 return "$lead$body";
1747
1748         } elsif ($where eq 'center') {
1749                 $str =~ m/^($endre)(.*)$/;
1750                 my ($left, $str)  = ($1, $2);
1751                 $str =~ m/^(.*?)($begre)$/;
1752                 my ($mid, $right) = ($1, $2);
1753                 if (length($mid) > 5) {
1754                         $mid = " ... ";
1755                 }
1756                 return "$left$mid$right";
1757
1758         } else {
1759                 $str =~ m/^($endre)(.*)$/;
1760                 my $body = $1;
1761                 my $tail = $2;
1762                 if (length($tail) > 4) {
1763                         $tail = "... ";
1764                 }
1765                 return "$body$tail";
1766         }
1767 }
1768
1769 # takes the same arguments as chop_str, but also wraps a <span> around the
1770 # result with a title attribute if it does get chopped. Additionally, the
1771 # string is HTML-escaped.
1772 sub chop_and_escape_str {
1773         my ($str) = @_;
1774
1775         my $chopped = chop_str(@_);
1776         if ($chopped eq $str) {
1777                 return esc_html($chopped);
1778         } else {
1779                 $str =~ s/[[:cntrl:]]/?/g;
1780                 return $cgi->span({-title=>$str}, esc_html($chopped));
1781         }
1782 }
1783
1784 ## ----------------------------------------------------------------------
1785 ## functions returning short strings
1786
1787 # CSS class for given age value (in seconds)
1788 sub age_class {
1789         my $age = shift;
1790
1791         if (!defined $age) {
1792                 return "noage";
1793         } elsif ($age < 60*60*2) {
1794                 return "age0";
1795         } elsif ($age < 60*60*24*2) {
1796                 return "age1";
1797         } else {
1798                 return "age2";
1799         }
1800 }
1801
1802 # convert age in seconds to "nn units ago" string
1803 sub age_string {
1804         my $age = shift;
1805         my $age_str;
1806
1807         if ($age > 60*60*24*365*2) {
1808                 $age_str = (int $age/60/60/24/365);
1809                 $age_str .= " years ago";
1810         } elsif ($age > 60*60*24*(365/12)*2) {
1811                 $age_str = int $age/60/60/24/(365/12);
1812                 $age_str .= " months ago";
1813         } elsif ($age > 60*60*24*7*2) {
1814                 $age_str = int $age/60/60/24/7;
1815                 $age_str .= " weeks ago";
1816         } elsif ($age > 60*60*24*2) {
1817                 $age_str = int $age/60/60/24;
1818                 $age_str .= " days ago";
1819         } elsif ($age > 60*60*2) {
1820                 $age_str = int $age/60/60;
1821                 $age_str .= " hours ago";
1822         } elsif ($age > 60*2) {
1823                 $age_str = int $age/60;
1824                 $age_str .= " min ago";
1825         } elsif ($age > 2) {
1826                 $age_str = int $age;
1827                 $age_str .= " sec ago";
1828         } else {
1829                 $age_str .= " right now";
1830         }
1831         return $age_str;
1832 }
1833
1834 use constant {
1835         S_IFINVALID => 0030000,
1836         S_IFGITLINK => 0160000,
1837 };
1838
1839 # submodule/subproject, a commit object reference
1840 sub S_ISGITLINK {
1841         my $mode = shift;
1842
1843         return (($mode & S_IFMT) == S_IFGITLINK)
1844 }
1845
1846 # convert file mode in octal to symbolic file mode string
1847 sub mode_str {
1848         my $mode = oct shift;
1849
1850         if (S_ISGITLINK($mode)) {
1851                 return 'm---------';
1852         } elsif (S_ISDIR($mode & S_IFMT)) {
1853                 return 'drwxr-xr-x';
1854         } elsif (S_ISLNK($mode)) {
1855                 return 'lrwxrwxrwx';
1856         } elsif (S_ISREG($mode)) {
1857                 # git cares only about the executable bit
1858                 if ($mode & S_IXUSR) {
1859                         return '-rwxr-xr-x';
1860                 } else {
1861                         return '-rw-r--r--';
1862                 };
1863         } else {
1864                 return '----------';
1865         }
1866 }
1867
1868 # convert file mode in octal to file type string
1869 sub file_type {
1870         my $mode = shift;
1871
1872         if ($mode !~ m/^[0-7]+$/) {
1873                 return $mode;
1874         } else {
1875                 $mode = oct $mode;
1876         }
1877
1878         if (S_ISGITLINK($mode)) {
1879                 return "submodule";
1880         } elsif (S_ISDIR($mode & S_IFMT)) {
1881                 return "directory";
1882         } elsif (S_ISLNK($mode)) {
1883                 return "symlink";
1884         } elsif (S_ISREG($mode)) {
1885                 return "file";
1886         } else {
1887                 return "unknown";
1888         }
1889 }
1890
1891 # convert file mode in octal to file type description string
1892 sub file_type_long {
1893         my $mode = shift;
1894
1895         if ($mode !~ m/^[0-7]+$/) {
1896                 return $mode;
1897         } else {
1898                 $mode = oct $mode;
1899         }
1900
1901         if (S_ISGITLINK($mode)) {
1902                 return "submodule";
1903         } elsif (S_ISDIR($mode & S_IFMT)) {
1904                 return "directory";
1905         } elsif (S_ISLNK($mode)) {
1906                 return "symlink";
1907         } elsif (S_ISREG($mode)) {
1908                 if ($mode & S_IXUSR) {
1909                         return "executable";
1910                 } else {
1911                         return "file";
1912                 };
1913         } else {
1914                 return "unknown";
1915         }
1916 }
1917
1918
1919 ## ----------------------------------------------------------------------
1920 ## functions returning short HTML fragments, or transforming HTML fragments
1921 ## which don't belong to other sections
1922
1923 # format line of commit message.
1924 sub format_log_line_html {
1925         my $line = shift;
1926
1927         $line = esc_html($line, -nbsp=>1);
1928         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1929                 $cgi->a({-href => href(action=>"object", hash=>$1),
1930                                         -class => "text"}, $1);
1931         }eg;
1932
1933         return $line;
1934 }
1935
1936 # format marker of refs pointing to given object
1937
1938 # the destination action is chosen based on object type and current context:
1939 # - for annotated tags, we choose the tag view unless it's the current view
1940 #   already, in which case we go to shortlog view
1941 # - for other refs, we keep the current view if we're in history, shortlog or
1942 #   log view, and select shortlog otherwise
1943 sub format_ref_marker {
1944         my ($refs, $id) = @_;
1945         my $markers = '';
1946
1947         if (defined $refs->{$id}) {
1948                 foreach my $ref (@{$refs->{$id}}) {
1949                         # this code exploits the fact that non-lightweight tags are the
1950                         # only indirect objects, and that they are the only objects for which
1951                         # we want to use tag instead of shortlog as action
1952                         my ($type, $name) = qw();
1953                         my $indirect = ($ref =~ s/\^\{\}$//);
1954                         # e.g. tags/v2.6.11 or heads/next
1955                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1956                                 $type = $1;
1957                                 $name = $2;
1958                         } else {
1959                                 $type = "ref";
1960                                 $name = $ref;
1961                         }
1962
1963                         my $class = $type;
1964                         $class .= " indirect" if $indirect;
1965
1966                         my $dest_action = "shortlog";
1967
1968                         if ($indirect) {
1969                                 $dest_action = "tag" unless $action eq "tag";
1970                         } elsif ($action =~ /^(history|(short)?log)$/) {
1971                                 $dest_action = $action;
1972                         }
1973
1974                         my $dest = "";
1975                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1976                         $dest .= $ref;
1977
1978                         my $link = $cgi->a({
1979                                 -href => href(
1980                                         action=>$dest_action,
1981                                         hash=>$dest
1982                                 )}, $name);
1983
1984                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1985                                 $link . "</span>";
1986                 }
1987         }
1988
1989         if ($markers) {
1990                 return ' <span class="refs">'. $markers . '</span>';
1991         } else {
1992                 return "";
1993         }
1994 }
1995
1996 # format, perhaps shortened and with markers, title line
1997 sub format_subject_html {
1998         my ($long, $short, $href, $extra) = @_;
1999         $extra = '' unless defined($extra);
2000
2001         if (length($short) < length($long)) {
2002                 $long =~ s/[[:cntrl:]]/?/g;
2003                 return $cgi->a({-href => $href, -class => "list subject",
2004                                 -title => to_utf8($long)},
2005                        esc_html($short)) . $extra;
2006         } else {
2007                 return $cgi->a({-href => $href, -class => "list subject"},
2008                        esc_html($long)) . $extra;
2009         }
2010 }
2011
2012 # Rather than recomputing the url for an email multiple times, we cache it
2013 # after the first hit. This gives a visible benefit in views where the avatar
2014 # for the same email is used repeatedly (e.g. shortlog).
2015 # The cache is shared by all avatar engines (currently gravatar only), which
2016 # are free to use it as preferred. Since only one avatar engine is used for any
2017 # given page, there's no risk for cache conflicts.
2018 our %avatar_cache = ();
2019
2020 # Compute the picon url for a given email, by using the picon search service over at
2021 # http://www.cs.indiana.edu/picons/search.html
2022 sub picon_url {
2023         my $email = lc shift;
2024         if (!$avatar_cache{$email}) {
2025                 my ($user, $domain) = split('@', $email);
2026                 $avatar_cache{$email} =
2027                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2028                         "$domain/$user/" .
2029                         "users+domains+unknown/up/single";
2030         }
2031         return $avatar_cache{$email};
2032 }
2033
2034 # Compute the gravatar url for a given email, if it's not in the cache already.
2035 # Gravatar stores only the part of the URL before the size, since that's the
2036 # one computationally more expensive. This also allows reuse of the cache for
2037 # different sizes (for this particular engine).
2038 sub gravatar_url {
2039         my $email = lc shift;
2040         my $size = shift;
2041         $avatar_cache{$email} ||=
2042                 "http://www.gravatar.com/avatar/" .
2043                         Digest::MD5::md5_hex($email) . "?s=";
2044         return $avatar_cache{$email} . $size;
2045 }
2046
2047 # Insert an avatar for the given $email at the given $size if the feature
2048 # is enabled.
2049 sub git_get_avatar {
2050         my ($email, %opts) = @_;
2051         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2052         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2053         $opts{-size} ||= 'default';
2054         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2055         my $url = "";
2056         if ($git_avatar eq 'gravatar') {
2057                 $url = gravatar_url($email, $size);
2058         } elsif ($git_avatar eq 'picon') {
2059                 $url = picon_url($email);
2060         }
2061         # Other providers can be added by extending the if chain, defining $url
2062         # as needed. If no variant puts something in $url, we assume avatars
2063         # are completely disabled/unavailable.
2064         if ($url) {
2065                 return $pre_white .
2066                        "<img width=\"$size\" " .
2067                             "class=\"avatar\" " .
2068                             "src=\"$url\" " .
2069                             "alt=\"\" " .
2070                        "/>" . $post_white;
2071         } else {
2072                 return "";
2073         }
2074 }
2075
2076 sub format_search_author {
2077         my ($author, $searchtype, $displaytext) = @_;
2078         my $have_search = gitweb_check_feature('search');
2079
2080         if ($have_search) {
2081                 my $performed = "";
2082                 if ($searchtype eq 'author') {
2083                         $performed = "authored";
2084                 } elsif ($searchtype eq 'committer') {
2085                         $performed = "committed";
2086                 }
2087
2088                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2089                                 searchtext=>$author,
2090                                 searchtype=>$searchtype), class=>"list",
2091                                 title=>"Search for commits $performed by $author"},
2092                                 $displaytext);
2093
2094         } else {
2095                 return $displaytext;
2096         }
2097 }
2098
2099 # format the author name of the given commit with the given tag
2100 # the author name is chopped and escaped according to the other
2101 # optional parameters (see chop_str).
2102 sub format_author_html {
2103         my $tag = shift;
2104         my $co = shift;
2105         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2106         return "<$tag class=\"author\">" .
2107                format_search_author($co->{'author_name'}, "author",
2108                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2109                        $author) .
2110                "</$tag>";
2111 }
2112
2113 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2114 sub format_git_diff_header_line {
2115         my $line = shift;
2116         my $diffinfo = shift;
2117         my ($from, $to) = @_;
2118
2119         if ($diffinfo->{'nparents'}) {
2120                 # combined diff
2121                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2122                 if ($to->{'href'}) {
2123                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2124                                          esc_path($to->{'file'}));
2125                 } else { # file was deleted (no href)
2126                         $line .= esc_path($to->{'file'});
2127                 }
2128         } else {
2129                 # "ordinary" diff
2130                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2131                 if ($from->{'href'}) {
2132                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2133                                          'a/' . esc_path($from->{'file'}));
2134                 } else { # file was added (no href)
2135                         $line .= 'a/' . esc_path($from->{'file'});
2136                 }
2137                 $line .= ' ';
2138                 if ($to->{'href'}) {
2139                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2140                                          'b/' . esc_path($to->{'file'}));
2141                 } else { # file was deleted
2142                         $line .= 'b/' . esc_path($to->{'file'});
2143                 }
2144         }
2145
2146         return "<div class=\"diff header\">$line</div>\n";
2147 }
2148
2149 # format extended diff header line, before patch itself
2150 sub format_extended_diff_header_line {
2151         my $line = shift;
2152         my $diffinfo = shift;
2153         my ($from, $to) = @_;
2154
2155         # match <path>
2156         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2157                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2158                                        esc_path($from->{'file'}));
2159         }
2160         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2161                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2162                                  esc_path($to->{'file'}));
2163         }
2164         # match single <mode>
2165         if ($line =~ m/\s(\d{6})$/) {
2166                 $line .= '<span class="info"> (' .
2167                          file_type_long($1) .
2168                          ')</span>';
2169         }
2170         # match <hash>
2171         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2172                 # can match only for combined diff
2173                 $line = 'index ';
2174                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2175                         if ($from->{'href'}[$i]) {
2176                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2177                                                   -class=>"hash"},
2178                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2179                         } else {
2180                                 $line .= '0' x 7;
2181                         }
2182                         # separator
2183                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2184                 }
2185                 $line .= '..';
2186                 if ($to->{'href'}) {
2187                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2188                                          substr($diffinfo->{'to_id'},0,7));
2189                 } else {
2190                         $line .= '0' x 7;
2191                 }
2192
2193         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2194                 # can match only for ordinary diff
2195                 my ($from_link, $to_link);
2196                 if ($from->{'href'}) {
2197                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2198                                              substr($diffinfo->{'from_id'},0,7));
2199                 } else {
2200                         $from_link = '0' x 7;
2201                 }
2202                 if ($to->{'href'}) {
2203                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2204                                            substr($diffinfo->{'to_id'},0,7));
2205                 } else {
2206                         $to_link = '0' x 7;
2207                 }
2208                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2209                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2210         }
2211
2212         return $line . "<br/>\n";
2213 }
2214
2215 # format from-file/to-file diff header
2216 sub format_diff_from_to_header {
2217         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2218         my $line;
2219         my $result = '';
2220
2221         $line = $from_line;
2222         #assert($line =~ m/^---/) if DEBUG;
2223         # no extra formatting for "^--- /dev/null"
2224         if (! $diffinfo->{'nparents'}) {
2225                 # ordinary (single parent) diff
2226                 if ($line =~ m!^--- "?a/!) {
2227                         if ($from->{'href'}) {
2228                                 $line = '--- a/' .
2229                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2230                                                 esc_path($from->{'file'}));
2231                         } else {
2232                                 $line = '--- a/' .
2233                                         esc_path($from->{'file'});
2234                         }
2235                 }
2236                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2237
2238         } else {
2239                 # combined diff (merge commit)
2240                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2241                         if ($from->{'href'}[$i]) {
2242                                 $line = '--- ' .
2243                                         $cgi->a({-href=>href(action=>"blobdiff",
2244                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2245                                                              hash_parent_base=>$parents[$i],
2246                                                              file_parent=>$from->{'file'}[$i],
2247                                                              hash=>$diffinfo->{'to_id'},
2248                                                              hash_base=>$hash,
2249                                                              file_name=>$to->{'file'}),
2250                                                  -class=>"path",
2251                                                  -title=>"diff" . ($i+1)},
2252                                                 $i+1) .
2253                                         '/' .
2254                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2255                                                 esc_path($from->{'file'}[$i]));
2256                         } else {
2257                                 $line = '--- /dev/null';
2258                         }
2259                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2260                 }
2261         }
2262
2263         $line = $to_line;
2264         #assert($line =~ m/^\+\+\+/) if DEBUG;
2265         # no extra formatting for "^+++ /dev/null"
2266         if ($line =~ m!^\+\+\+ "?b/!) {
2267                 if ($to->{'href'}) {
2268                         $line = '+++ b/' .
2269                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2270                                         esc_path($to->{'file'}));
2271                 } else {
2272                         $line = '+++ b/' .
2273                                 esc_path($to->{'file'});
2274                 }
2275         }
2276         $result .= qq!<div class="diff to_file">$line</div>\n!;
2277
2278         return $result;
2279 }
2280
2281 # create note for patch simplified by combined diff
2282 sub format_diff_cc_simplified {
2283         my ($diffinfo, @parents) = @_;
2284         my $result = '';
2285
2286         $result .= "<div class=\"diff header\">" .
2287                    "diff --cc ";
2288         if (!is_deleted($diffinfo)) {
2289                 $result .= $cgi->a({-href => href(action=>"blob",
2290                                                   hash_base=>$hash,
2291                                                   hash=>$diffinfo->{'to_id'},
2292                                                   file_name=>$diffinfo->{'to_file'}),
2293                                     -class => "path"},
2294                                    esc_path($diffinfo->{'to_file'}));
2295         } else {
2296                 $result .= esc_path($diffinfo->{'to_file'});
2297         }
2298         $result .= "</div>\n" . # class="diff header"
2299                    "<div class=\"diff nodifferences\">" .
2300                    "Simple merge" .
2301                    "</div>\n"; # class="diff nodifferences"
2302
2303         return $result;
2304 }
2305
2306 # format patch (diff) line (not to be used for diff headers)
2307 sub format_diff_line {
2308         my $line = shift;
2309         my ($from, $to) = @_;
2310         my $diff_class = "";
2311
2312         chomp $line;
2313
2314         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2315                 # combined diff
2316                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2317                 if ($line =~ m/^\@{3}/) {
2318                         $diff_class = " chunk_header";
2319                 } elsif ($line =~ m/^\\/) {
2320                         $diff_class = " incomplete";
2321                 } elsif ($prefix =~ tr/+/+/) {
2322                         $diff_class = " add";
2323                 } elsif ($prefix =~ tr/-/-/) {
2324                         $diff_class = " rem";
2325                 }
2326         } else {
2327                 # assume ordinary diff
2328                 my $char = substr($line, 0, 1);
2329                 if ($char eq '+') {
2330                         $diff_class = " add";
2331                 } elsif ($char eq '-') {
2332                         $diff_class = " rem";
2333                 } elsif ($char eq '@') {
2334                         $diff_class = " chunk_header";
2335                 } elsif ($char eq "\\") {
2336                         $diff_class = " incomplete";
2337                 }
2338         }
2339         $line = untabify($line);
2340         if ($from && $to && $line =~ m/^\@{2} /) {
2341                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2342                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2343
2344                 $from_lines = 0 unless defined $from_lines;
2345                 $to_lines   = 0 unless defined $to_lines;
2346
2347                 if ($from->{'href'}) {
2348                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2349                                              -class=>"list"}, $from_text);
2350                 }
2351                 if ($to->{'href'}) {
2352                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2353                                              -class=>"list"}, $to_text);
2354                 }
2355                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2356                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2357                 return "<div class=\"diff$diff_class\">$line</div>\n";
2358         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2359                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2360                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2361
2362                 @from_text = split(' ', $ranges);
2363                 for (my $i = 0; $i < @from_text; ++$i) {
2364                         ($from_start[$i], $from_nlines[$i]) =
2365                                 (split(',', substr($from_text[$i], 1)), 0);
2366                 }
2367
2368                 $to_text   = pop @from_text;
2369                 $to_start  = pop @from_start;
2370                 $to_nlines = pop @from_nlines;
2371
2372                 $line = "<span class=\"chunk_info\">$prefix ";
2373                 for (my $i = 0; $i < @from_text; ++$i) {
2374                         if ($from->{'href'}[$i]) {
2375                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2376                                                   -class=>"list"}, $from_text[$i]);
2377                         } else {
2378                                 $line .= $from_text[$i];
2379                         }
2380                         $line .= " ";
2381                 }
2382                 if ($to->{'href'}) {
2383                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2384                                           -class=>"list"}, $to_text);
2385                 } else {
2386                         $line .= $to_text;
2387                 }
2388                 $line .= " $prefix</span>" .
2389                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2390                 return "<div class=\"diff$diff_class\">$line</div>\n";
2391         }
2392         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2393 }
2394
2395 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2396 # linked.  Pass the hash of the tree/commit to snapshot.
2397 sub format_snapshot_links {
2398         my ($hash) = @_;
2399         my $num_fmts = @snapshot_fmts;
2400         if ($num_fmts > 1) {
2401                 # A parenthesized list of links bearing format names.
2402                 # e.g. "snapshot (_tar.gz_ _zip_)"
2403                 return "snapshot (" . join(' ', map
2404                         $cgi->a({
2405                                 -href => href(
2406                                         action=>"snapshot",
2407                                         hash=>$hash,
2408                                         snapshot_format=>$_
2409                                 )
2410                         }, $known_snapshot_formats{$_}{'display'})
2411                 , @snapshot_fmts) . ")";
2412         } elsif ($num_fmts == 1) {
2413                 # A single "snapshot" link whose tooltip bears the format name.
2414                 # i.e. "_snapshot_"
2415                 my ($fmt) = @snapshot_fmts;
2416                 return
2417                         $cgi->a({
2418                                 -href => href(
2419                                         action=>"snapshot",
2420                                         hash=>$hash,
2421                                         snapshot_format=>$fmt
2422                                 ),
2423                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2424                         }, "snapshot");
2425         } else { # $num_fmts == 0
2426                 return undef;
2427         }
2428 }
2429
2430 ## ......................................................................
2431 ## functions returning values to be passed, perhaps after some
2432 ## transformation, to other functions; e.g. returning arguments to href()
2433
2434 # returns hash to be passed to href to generate gitweb URL
2435 # in -title key it returns description of link
2436 sub get_feed_info {
2437         my $format = shift || 'Atom';
2438         my %res = (action => lc($format));
2439
2440         # feed links are possible only for project views
2441         return unless (defined $project);
2442         # some views should link to OPML, or to generic project feed,
2443         # or don't have specific feed yet (so they should use generic)
2444         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2445
2446         my $branch;
2447         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2448         # from tag links; this also makes possible to detect branch links
2449         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2450             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2451                 $branch = $1;
2452         }
2453         # find log type for feed description (title)
2454         my $type = 'log';
2455         if (defined $file_name) {
2456                 $type  = "history of $file_name";
2457                 $type .= "/" if ($action eq 'tree');
2458                 $type .= " on '$branch'" if (defined $branch);
2459         } else {
2460                 $type = "log of $branch" if (defined $branch);
2461         }
2462
2463         $res{-title} = $type;
2464         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2465         $res{'file_name'} = $file_name;
2466
2467         return %res;
2468 }
2469
2470 ## ----------------------------------------------------------------------
2471 ## git utility subroutines, invoking git commands
2472
2473 # returns path to the core git executable and the --git-dir parameter as list
2474 sub git_cmd {
2475         $number_of_git_cmds++;
2476         return $GIT, '--git-dir='.$git_dir;
2477 }
2478
2479 # quote the given arguments for passing them to the shell
2480 # quote_command("command", "arg 1", "arg with ' and ! characters")
2481 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2482 # Try to avoid using this function wherever possible.
2483 sub quote_command {
2484         return join(' ',
2485                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2486 }
2487
2488 # get HEAD ref of given project as hash
2489 sub git_get_head_hash {
2490         return git_get_full_hash(shift, 'HEAD');
2491 }
2492
2493 sub git_get_full_hash {
2494         return git_get_hash(@_);
2495 }
2496
2497 sub git_get_short_hash {
2498         return git_get_hash(@_, '--short=7');
2499 }
2500
2501 sub git_get_hash {
2502         my ($project, $hash, @options) = @_;
2503         my $o_git_dir = $git_dir;
2504         my $retval = undef;
2505         $git_dir = "$projectroot/$project";
2506         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2507             '--verify', '-q', @options, $hash) {
2508                 $retval = <$fd>;
2509                 chomp $retval if defined $retval;
2510                 close $fd;
2511         }
2512         if (defined $o_git_dir) {
2513                 $git_dir = $o_git_dir;
2514         }
2515         return $retval;
2516 }
2517
2518 # get type of given object
2519 sub git_get_type {
2520         my $hash = shift;
2521
2522         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2523         my $type = <$fd>;
2524         close $fd or return;
2525         chomp $type;
2526         return $type;
2527 }
2528
2529 # repository configuration
2530 our $config_file = '';
2531 our %config;
2532
2533 # store multiple values for single key as anonymous array reference
2534 # single values stored directly in the hash, not as [ <value> ]
2535 sub hash_set_multi {
2536         my ($hash, $key, $value) = @_;
2537
2538         if (!exists $hash->{$key}) {
2539                 $hash->{$key} = $value;
2540         } elsif (!ref $hash->{$key}) {
2541                 $hash->{$key} = [ $hash->{$key}, $value ];
2542         } else {
2543                 push @{$hash->{$key}}, $value;
2544         }
2545 }
2546
2547 # return hash of git project configuration
2548 # optionally limited to some section, e.g. 'gitweb'
2549 sub git_parse_project_config {
2550         my $section_regexp = shift;
2551         my %config;
2552
2553         local $/ = "\0";
2554
2555         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2556                 or return;
2557
2558         while (my $keyval = <$fh>) {
2559                 chomp $keyval;
2560                 my ($key, $value) = split(/\n/, $keyval, 2);
2561
2562                 hash_set_multi(\%config, $key, $value)
2563                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2564         }
2565         close $fh;
2566
2567         return %config;
2568 }
2569
2570 # convert config value to boolean: 'true' or 'false'
2571 # no value, number > 0, 'true' and 'yes' values are true
2572 # rest of values are treated as false (never as error)
2573 sub config_to_bool {
2574         my $val = shift;
2575
2576         return 1 if !defined $val;             # section.key
2577
2578         # strip leading and trailing whitespace
2579         $val =~ s/^\s+//;
2580         $val =~ s/\s+$//;
2581
2582         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2583                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2584 }
2585
2586 # convert config value to simple decimal number
2587 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2588 # to be multiplied by 1024, 1048576, or 1073741824
2589 sub config_to_int {
2590         my $val = shift;
2591
2592         # strip leading and trailing whitespace
2593         $val =~ s/^\s+//;
2594         $val =~ s/\s+$//;
2595
2596         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2597                 $unit = lc($unit);
2598                 # unknown unit is treated as 1
2599                 return $num * ($unit eq 'g' ? 1073741824 :
2600                                $unit eq 'm' ?    1048576 :
2601                                $unit eq 'k' ?       1024 : 1);
2602         }
2603         return $val;
2604 }
2605
2606 # convert config value to array reference, if needed
2607 sub config_to_multi {
2608         my $val = shift;
2609
2610         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2611 }
2612
2613 sub git_get_project_config {
2614         my ($key, $type) = @_;
2615
2616         return unless defined $git_dir;
2617
2618         # key sanity check
2619         return unless ($key);
2620         $key =~ s/^gitweb\.//;
2621         return if ($key =~ m/\W/);
2622
2623         # type sanity check
2624         if (defined $type) {
2625                 $type =~ s/^--//;
2626                 $type = undef
2627                         unless ($type eq 'bool' || $type eq 'int');
2628         }
2629
2630         # get config
2631         if (!defined $config_file ||
2632             $config_file ne "$git_dir/config") {
2633                 %config = git_parse_project_config('gitweb');
2634                 $config_file = "$git_dir/config";
2635         }
2636
2637         # check if config variable (key) exists
2638         return unless exists $config{"gitweb.$key"};
2639
2640         # ensure given type
2641         if (!defined $type) {
2642                 return $config{"gitweb.$key"};
2643         } elsif ($type eq 'bool') {
2644                 # backward compatibility: 'git config --bool' returns true/false
2645                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2646         } elsif ($type eq 'int') {
2647                 return config_to_int($config{"gitweb.$key"});
2648         }
2649         return $config{"gitweb.$key"};
2650 }
2651
2652 # get hash of given path at given ref
2653 sub git_get_hash_by_path {
2654         my $base = shift;
2655         my $path = shift || return undef;
2656         my $type = shift;
2657
2658         $path =~ s,/+$,,;
2659
2660         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2661                 or die_error(500, "Open git-ls-tree failed");
2662         my $line = <$fd>;
2663         close $fd or return undef;
2664
2665         if (!defined $line) {
2666                 # there is no tree or hash given by $path at $base
2667                 return undef;
2668         }
2669
2670         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2671         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2672         if (defined $type && $type ne $2) {
2673                 # type doesn't match
2674                 return undef;
2675         }
2676         return $3;
2677 }
2678
2679 # get path of entry with given hash at given tree-ish (ref)
2680 # used to get 'from' filename for combined diff (merge commit) for renames
2681 sub git_get_path_by_hash {
2682         my $base = shift || return;
2683         my $hash = shift || return;
2684
2685         local $/ = "\0";
2686
2687         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2688                 or return undef;
2689         while (my $line = <$fd>) {
2690                 chomp $line;
2691
2692                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2693                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2694                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2695                         close $fd;
2696                         return $1;
2697                 }
2698         }
2699         close $fd;
2700         return undef;
2701 }
2702
2703 ## ......................................................................
2704 ## git utility functions, directly accessing git repository
2705
2706 sub git_get_project_description {
2707         my $path = shift;
2708
2709         $git_dir = "$projectroot/$path";
2710         open my $fd, '<', "$git_dir/description"
2711                 or return git_get_project_config('description');
2712         my $descr = <$fd>;
2713         close $fd;
2714         if (defined $descr) {
2715                 chomp $descr;
2716         }
2717         return $descr;
2718 }
2719
2720 sub git_get_project_ctags {
2721         my $path = shift;
2722         my $ctags = {};
2723
2724         $git_dir = "$projectroot/$path";
2725         opendir my $dh, "$git_dir/ctags"
2726                 or return $ctags;
2727         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2728                 open my $ct, '<', $_ or next;
2729                 my $val = <$ct>;
2730                 chomp $val;
2731                 close $ct;
2732                 my $ctag = $_; $ctag =~ s#.*/##;
2733                 $ctags->{$ctag} = $val;
2734         }
2735         closedir $dh;
2736         $ctags;
2737 }
2738
2739 sub git_populate_project_tagcloud {
2740         my $ctags = shift;
2741
2742         # First, merge different-cased tags; tags vote on casing
2743         my %ctags_lc;
2744         foreach (keys %$ctags) {
2745                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2746                 if (not $ctags_lc{lc $_}->{topcount}
2747                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2748                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2749                         $ctags_lc{lc $_}->{topname} = $_;
2750                 }
2751         }
2752
2753         my $cloud;
2754         if (eval { require HTML::TagCloud; 1; }) {
2755                 $cloud = HTML::TagCloud->new;
2756                 foreach (sort keys %ctags_lc) {
2757                         # Pad the title with spaces so that the cloud looks
2758                         # less crammed.
2759                         my $title = $ctags_lc{$_}->{topname};
2760                         $title =~ s/ /&nbsp;/g;
2761                         $title =~ s/^/&nbsp;/g;
2762                         $title =~ s/$/&nbsp;/g;
2763                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2764                 }
2765         } else {
2766                 $cloud = \%ctags_lc;
2767         }
2768         $cloud;
2769 }
2770
2771 sub git_show_project_tagcloud {
2772         my ($cloud, $count) = @_;
2773         print STDERR ref($cloud)."..\n";
2774         if (ref $cloud eq 'HTML::TagCloud') {
2775                 return $cloud->html_and_css($count);
2776         } else {
2777                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2778                 return '<p align="center">' . join (', ', map {
2779                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2780                 } splice(@tags, 0, $count)) . '</p>';
2781         }
2782 }
2783
2784 sub git_get_project_url_list {
2785         my $path = shift;
2786
2787         $git_dir = "$projectroot/$path";
2788         open my $fd, '<', "$git_dir/cloneurl"
2789                 or return wantarray ?
2790                 @{ config_to_multi(git_get_project_config('url')) } :
2791                    config_to_multi(git_get_project_config('url'));
2792         my @git_project_url_list = map { chomp; $_ } <$fd>;
2793         close $fd;
2794
2795         return wantarray ? @git_project_url_list : \@git_project_url_list;
2796 }
2797
2798 sub git_get_projects_list {
2799         my ($filter) = @_;
2800         my @list;
2801
2802         $filter ||= '';
2803         $filter =~ s/\.git$//;
2804
2805         my $check_forks = gitweb_check_feature('forks');
2806
2807         if (-d $projects_list) {
2808                 # search in directory
2809                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2810                 # remove the trailing "/"
2811                 $dir =~ s!/+$!!;
2812                 my $pfxlen = length("$dir");
2813                 my $pfxdepth = ($dir =~ tr!/!!);
2814
2815                 File::Find::find({
2816                         follow_fast => 1, # follow symbolic links
2817                         follow_skip => 2, # ignore duplicates
2818                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2819                         wanted => sub {
2820                                 # global variables
2821                                 our $project_maxdepth;
2822                                 our $projectroot;
2823                                 # skip project-list toplevel, if we get it.
2824                                 return if (m!^[/.]$!);
2825                                 # only directories can be git repositories
2826                                 return unless (-d $_);
2827                                 # don't traverse too deep (Find is super slow on os x)
2828                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2829                                         $File::Find::prune = 1;
2830                                         return;
2831                                 }
2832
2833                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2834                                 # we check related file in $projectroot
2835                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2836                                 if (check_export_ok("$projectroot/$path")) {
2837                                         push @list, { path => $path };
2838                                         $File::Find::prune = 1;
2839                                 }
2840                         },
2841                 }, "$dir");
2842
2843         } elsif (-f $projects_list) {
2844                 # read from file(url-encoded):
2845                 # 'git%2Fgit.git Linus+Torvalds'
2846                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2847                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2848                 my %paths;
2849                 open my $fd, '<', $projects_list or return;
2850         PROJECT:
2851                 while (my $line = <$fd>) {
2852                         chomp $line;
2853                         my ($path, $owner) = split ' ', $line;
2854                         $path = unescape($path);
2855                         $owner = unescape($owner);
2856                         if (!defined $path) {
2857                                 next;
2858                         }
2859                         if ($filter ne '') {
2860                                 # looking for forks;
2861                                 my $pfx = substr($path, 0, length($filter));
2862                                 if ($pfx ne $filter) {
2863                                         next PROJECT;
2864                                 }
2865                                 my $sfx = substr($path, length($filter));
2866                                 if ($sfx !~ /^\/.*\.git$/) {
2867                                         next PROJECT;
2868                                 }
2869                         } elsif ($check_forks) {
2870                         PATH:
2871                                 foreach my $filter (keys %paths) {
2872                                         # looking for forks;
2873                                         my $pfx = substr($path, 0, length($filter));
2874                                         if ($pfx ne $filter) {
2875                                                 next PATH;
2876                                         }
2877                                         my $sfx = substr($path, length($filter));
2878                                         if ($sfx !~ /^\/.*\.git$/) {
2879                                                 next PATH;
2880                                         }
2881                                         # is a fork, don't include it in
2882                                         # the list
2883                                         next PROJECT;
2884                                 }
2885                         }
2886                         if (check_export_ok("$projectroot/$path")) {
2887                                 my $pr = {
2888                                         path => $path,
2889                                         owner => to_utf8($owner),
2890                                 };
2891                                 push @list, $pr;
2892                                 (my $forks_path = $path) =~ s/\.git$//;
2893                                 $paths{$forks_path}++;
2894                         }
2895                 }
2896                 close $fd;
2897         }
2898         return @list;
2899 }
2900
2901 our $gitweb_project_owner = undef;
2902 sub git_get_project_list_from_file {
2903
2904         return if (defined $gitweb_project_owner);
2905
2906         $gitweb_project_owner = {};
2907         # read from file (url-encoded):
2908         # 'git%2Fgit.git Linus+Torvalds'
2909         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2910         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2911         if (-f $projects_list) {
2912                 open(my $fd, '<', $projects_list);
2913                 while (my $line = <$fd>) {
2914                         chomp $line;
2915                         my ($pr, $ow) = split ' ', $line;
2916                         $pr = unescape($pr);
2917                         $ow = unescape($ow);
2918                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2919                 }
2920                 close $fd;
2921         }
2922 }
2923
2924 sub git_get_project_owner {
2925         my $project = shift;
2926         my $owner;
2927
2928         return undef unless $project;
2929         $git_dir = "$projectroot/$project";
2930
2931         if (!defined $gitweb_project_owner) {
2932                 git_get_project_list_from_file();
2933         }
2934
2935         if (exists $gitweb_project_owner->{$project}) {
2936                 $owner = $gitweb_project_owner->{$project};
2937         }
2938         if (!defined $owner){
2939                 $owner = git_get_project_config('owner');
2940         }
2941         if (!defined $owner) {
2942                 $owner = get_file_owner("$git_dir");
2943         }
2944
2945         return $owner;
2946 }
2947
2948 sub git_get_last_activity {
2949         my ($path) = @_;
2950         my $fd;
2951
2952         $git_dir = "$projectroot/$path";
2953         open($fd, "-|", git_cmd(), 'for-each-ref',
2954              '--format=%(committer)',
2955              '--sort=-committerdate',
2956              '--count=1',
2957              'refs/heads') or return;
2958         my $most_recent = <$fd>;
2959         close $fd or return;
2960         if (defined $most_recent &&
2961             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2962                 my $timestamp = $1;
2963                 my $age = time - $timestamp;
2964                 return ($age, age_string($age));
2965         }
2966         return (undef, undef);
2967 }
2968
2969 sub git_get_references {
2970         my $type = shift || "";
2971         my %refs;
2972         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2973         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2974         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2975                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2976                 or return;
2977
2978         while (my $line = <$fd>) {
2979                 chomp $line;
2980                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2981                         if (defined $refs{$1}) {
2982                                 push @{$refs{$1}}, $2;
2983                         } else {
2984                                 $refs{$1} = [ $2 ];
2985                         }
2986                 }
2987         }
2988         close $fd or return;
2989         return \%refs;
2990 }
2991
2992 sub git_get_rev_name_tags {
2993         my $hash = shift || return undef;
2994
2995         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2996                 or return;
2997         my $name_rev = <$fd>;
2998         close $fd;
2999
3000         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3001                 return $1;
3002         } else {
3003                 # catches also '$hash undefined' output
3004                 return undef;
3005         }
3006 }
3007
3008 ## ----------------------------------------------------------------------
3009 ## parse to hash functions
3010
3011 sub parse_date {
3012         my $epoch = shift;
3013         my $tz = shift || "-0000";
3014
3015         my %date;
3016         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3017         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3018         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3019         $date{'hour'} = $hour;
3020         $date{'minute'} = $min;
3021         $date{'mday'} = $mday;
3022         $date{'day'} = $days[$wday];
3023         $date{'month'} = $months[$mon];
3024         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3025                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3026         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3027                              $mday, $months[$mon], $hour ,$min;
3028         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3029                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3030
3031         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
3032         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
3033         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3034         $date{'hour_local'} = $hour;
3035         $date{'minute_local'} = $min;
3036         $date{'tz_local'} = $tz;
3037         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3038                                   1900+$year, $mon+1, $mday,
3039                                   $hour, $min, $sec, $tz);
3040         return %date;
3041 }
3042
3043 sub parse_tag {
3044         my $tag_id = shift;
3045         my %tag;
3046         my @comment;
3047
3048         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3049         $tag{'id'} = $tag_id;
3050         while (my $line = <$fd>) {
3051                 chomp $line;
3052                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3053                         $tag{'object'} = $1;
3054                 } elsif ($line =~ m/^type (.+)$/) {
3055                         $tag{'type'} = $1;
3056                 } elsif ($line =~ m/^tag (.+)$/) {
3057                         $tag{'name'} = $1;
3058                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3059                         $tag{'author'} = $1;
3060                         $tag{'author_epoch'} = $2;
3061                         $tag{'author_tz'} = $3;
3062                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3063                                 $tag{'author_name'}  = $1;
3064                                 $tag{'author_email'} = $2;
3065                         } else {
3066                                 $tag{'author_name'} = $tag{'author'};
3067                         }
3068                 } elsif ($line =~ m/--BEGIN/) {
3069                         push @comment, $line;
3070                         last;
3071                 } elsif ($line eq "") {
3072                         last;
3073                 }
3074         }
3075         push @comment, <$fd>;
3076         $tag{'comment'} = \@comment;
3077         close $fd or return;
3078         if (!defined $tag{'name'}) {
3079                 return
3080         };
3081         return %tag
3082 }
3083
3084 sub parse_commit_text {
3085         my ($commit_text, $withparents) = @_;
3086         my @commit_lines = split '\n', $commit_text;
3087         my %co;
3088
3089         pop @commit_lines; # Remove '\0'
3090
3091         if (! @commit_lines) {
3092                 return;
3093         }
3094
3095         my $header = shift @commit_lines;
3096         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3097                 return;
3098         }
3099         ($co{'id'}, my @parents) = split ' ', $header;
3100         while (my $line = shift @commit_lines) {
3101                 last if $line eq "\n";
3102                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3103                         $co{'tree'} = $1;
3104                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3105                         push @parents, $1;
3106                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3107                         $co{'author'} = to_utf8($1);
3108                         $co{'author_epoch'} = $2;
3109                         $co{'author_tz'} = $3;
3110                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3111                                 $co{'author_name'}  = $1;
3112                                 $co{'author_email'} = $2;
3113                         } else {
3114                                 $co{'author_name'} = $co{'author'};
3115                         }
3116                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3117                         $co{'committer'} = to_utf8($1);
3118                         $co{'committer_epoch'} = $2;
3119                         $co{'committer_tz'} = $3;
3120                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3121                                 $co{'committer_name'}  = $1;
3122                                 $co{'committer_email'} = $2;
3123                         } else {
3124                                 $co{'committer_name'} = $co{'committer'};
3125                         }
3126                 }
3127         }
3128         if (!defined $co{'tree'}) {
3129                 return;
3130         };
3131         $co{'parents'} = \@parents;
3132         $co{'parent'} = $parents[0];
3133
3134         foreach my $title (@commit_lines) {
3135                 $title =~ s/^    //;
3136                 if ($title ne "") {
3137                         $co{'title'} = chop_str($title, 80, 5);
3138                         # remove leading stuff of merges to make the interesting part visible
3139                         if (length($title) > 50) {
3140                                 $title =~ s/^Automatic //;
3141                                 $title =~ s/^merge (of|with) /Merge ... /i;
3142                                 if (length($title) > 50) {
3143                                         $title =~ s/(http|rsync):\/\///;
3144                                 }
3145                                 if (length($title) > 50) {
3146                                         $title =~ s/(master|www|rsync)\.//;
3147                                 }
3148                                 if (length($title) > 50) {
3149                                         $title =~ s/kernel.org:?//;
3150                                 }
3151                                 if (length($title) > 50) {
3152                                         $title =~ s/\/pub\/scm//;
3153                                 }
3154                         }
3155                         $co{'title_short'} = chop_str($title, 50, 5);
3156                         last;
3157                 }
3158         }
3159         if (! defined $co{'title'} || $co{'title'} eq "") {
3160                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3161         }
3162         # remove added spaces
3163         foreach my $line (@commit_lines) {
3164                 $line =~ s/^    //;
3165         }
3166         $co{'comment'} = \@commit_lines;
3167
3168         my $age = time - $co{'committer_epoch'};
3169         $co{'age'} = $age;
3170         $co{'age_string'} = age_string($age);
3171         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3172         if ($age > 60*60*24*7*2) {
3173                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3174                 $co{'age_string_age'} = $co{'age_string'};
3175         } else {
3176                 $co{'age_string_date'} = $co{'age_string'};
3177                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3178         }
3179         return %co;
3180 }
3181
3182 sub parse_commit {
3183         my ($commit_id) = @_;
3184         my %co;
3185
3186         local $/ = "\0";
3187
3188         open my $fd, "-|", git_cmd(), "rev-list",
3189                 "--parents",
3190                 "--header",
3191                 "--max-count=1",
3192                 $commit_id,
3193                 "--",
3194                 or die_error(500, "Open git-rev-list failed");
3195         %co = parse_commit_text(<$fd>, 1);
3196         close $fd;
3197
3198         return %co;
3199 }
3200
3201 sub parse_commits {
3202         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3203         my @cos;
3204
3205         $maxcount ||= 1;
3206         $skip ||= 0;
3207
3208         local $/ = "\0";
3209
3210         open my $fd, "-|", git_cmd(), "rev-list",
3211                 "--header",
3212                 @args,
3213                 ("--max-count=" . $maxcount),
3214                 ("--skip=" . $skip),
3215                 @extra_options,
3216                 $commit_id,
3217                 "--",
3218                 ($filename ? ($filename) : ())
3219                 or die_error(500, "Open git-rev-list failed");
3220         while (my $line = <$fd>) {
3221                 my %co = parse_commit_text($line);
3222                 push @cos, \%co;
3223         }
3224         close $fd;
3225
3226         return wantarray ? @cos : \@cos;
3227 }
3228
3229 # parse line of git-diff-tree "raw" output
3230 sub parse_difftree_raw_line {
3231         my $line = shift;
3232         my %res;
3233
3234         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3235         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3236         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3237                 $res{'from_mode'} = $1;
3238                 $res{'to_mode'} = $2;
3239                 $res{'from_id'} = $3;
3240                 $res{'to_id'} = $4;
3241                 $res{'status'} = $5;
3242                 $res{'similarity'} = $6;
3243                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3244                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3245                 } else {
3246                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3247                 }
3248         }
3249         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3250         # combined diff (for merge commit)
3251         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3252                 $res{'nparents'}  = length($1);
3253                 $res{'from_mode'} = [ split(' ', $2) ];
3254                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3255                 $res{'from_id'} = [ split(' ', $3) ];
3256                 $res{'to_id'} = pop @{$res{'from_id'}};
3257                 $res{'status'} = [ split('', $4) ];
3258                 $res{'to_file'} = unquote($5);
3259         }
3260         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3261         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3262                 $res{'commit'} = $1;
3263         }
3264
3265         return wantarray ? %res : \%res;
3266 }
3267
3268 # wrapper: return parsed line of git-diff-tree "raw" output
3269 # (the argument might be raw line, or parsed info)
3270 sub parsed_difftree_line {
3271         my $line_or_ref = shift;
3272
3273         if (ref($line_or_ref) eq "HASH") {
3274                 # pre-parsed (or generated by hand)
3275                 return $line_or_ref;
3276         } else {
3277                 return parse_difftree_raw_line($line_or_ref);
3278         }
3279 }
3280
3281 # parse line of git-ls-tree output
3282 sub parse_ls_tree_line {
3283         my $line = shift;
3284         my %opts = @_;
3285         my %res;
3286
3287         if ($opts{'-l'}) {
3288                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3289                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3290
3291                 $res{'mode'} = $1;
3292                 $res{'type'} = $2;
3293                 $res{'hash'} = $3;
3294                 $res{'size'} = $4;
3295                 if ($opts{'-z'}) {
3296                         $res{'name'} = $5;
3297                 } else {
3298                         $res{'name'} = unquote($5);
3299                 }
3300         } else {
3301                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3302                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3303
3304                 $res{'mode'} = $1;
3305                 $res{'type'} = $2;
3306                 $res{'hash'} = $3;
3307                 if ($opts{'-z'}) {
3308                         $res{'name'} = $4;
3309                 } else {
3310                         $res{'name'} = unquote($4);
3311                 }
3312         }
3313
3314         return wantarray ? %res : \%res;
3315 }
3316
3317 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3318 sub parse_from_to_diffinfo {
3319         my ($diffinfo, $from, $to, @parents) = @_;
3320
3321         if ($diffinfo->{'nparents'}) {
3322                 # combined diff
3323                 $from->{'file'} = [];
3324                 $from->{'href'} = [];
3325                 fill_from_file_info($diffinfo, @parents)
3326                         unless exists $diffinfo->{'from_file'};
3327                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3328                         $from->{'file'}[$i] =
3329                                 defined $diffinfo->{'from_file'}[$i] ?
3330                                         $diffinfo->{'from_file'}[$i] :
3331                                         $diffinfo->{'to_file'};
3332                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3333                                 $from->{'href'}[$i] = href(action=>"blob",
3334                                                            hash_base=>$parents[$i],
3335                                                            hash=>$diffinfo->{'from_id'}[$i],
3336                                                            file_name=>$from->{'file'}[$i]);
3337                         } else {
3338                                 $from->{'href'}[$i] = undef;
3339                         }
3340                 }
3341         } else {
3342                 # ordinary (not combined) diff
3343                 $from->{'file'} = $diffinfo->{'from_file'};
3344                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3345                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3346                                                hash=>$diffinfo->{'from_id'},
3347                                                file_name=>$from->{'file'});
3348                 } else {
3349                         delete $from->{'href'};
3350                 }
3351         }
3352
3353         $to->{'file'} = $diffinfo->{'to_file'};
3354         if (!is_deleted($diffinfo)) { # file exists in result
3355                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3356                                      hash=>$diffinfo->{'to_id'},
3357                                      file_name=>$to->{'file'});
3358         } else {
3359                 delete $to->{'href'};
3360         }
3361 }
3362
3363 ## ......................................................................
3364 ## parse to array of hashes functions
3365
3366 sub git_get_heads_list {
3367         my $limit = shift;
3368         my @headslist;
3369
3370         open my $fd, '-|', git_cmd(), 'for-each-ref',
3371                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3372                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3373                 'refs/heads'
3374                 or return;
3375         while (my $line = <$fd>) {
3376                 my %ref_item;
3377
3378                 chomp $line;
3379                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3380                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3381                 my ($committer, $epoch, $tz) =
3382                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3383                 $ref_item{'fullname'}  = $name;
3384                 $name =~ s!^refs/heads/!!;
3385
3386                 $ref_item{'name'}  = $name;
3387                 $ref_item{'id'}    = $hash;
3388                 $ref_item{'title'} = $title || '(no commit message)';
3389                 $ref_item{'epoch'} = $epoch;
3390                 if ($epoch) {
3391                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3392                 } else {
3393                         $ref_item{'age'} = "unknown";
3394                 }
3395
3396                 push @headslist, \%ref_item;
3397         }
3398         close $fd;
3399
3400         return wantarray ? @headslist : \@headslist;
3401 }
3402
3403 sub git_get_tags_list {
3404         my $limit = shift;
3405         my @tagslist;
3406
3407         open my $fd, '-|', git_cmd(), 'for-each-ref',
3408                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3409                 '--format=%(objectname) %(objecttype) %(refname) '.
3410                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3411                 'refs/tags'
3412                 or return;
3413         while (my $line = <$fd>) {
3414                 my %ref_item;
3415
3416                 chomp $line;
3417                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3418                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3419                 my ($creator, $epoch, $tz) =
3420                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3421                 $ref_item{'fullname'} = $name;
3422                 $name =~ s!^refs/tags/!!;
3423
3424                 $ref_item{'type'} = $type;
3425                 $ref_item{'id'} = $id;
3426                 $ref_item{'name'} = $name;
3427                 if ($type eq "tag") {
3428                         $ref_item{'subject'} = $title;
3429                         $ref_item{'reftype'} = $reftype;
3430                         $ref_item{'refid'}   = $refid;
3431                 } else {
3432                         $ref_item{'reftype'} = $type;
3433                         $ref_item{'refid'}   = $id;
3434                 }
3435
3436                 if ($type eq "tag" || $type eq "commit") {
3437                         $ref_item{'epoch'} = $epoch;
3438                         if ($epoch) {
3439                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3440                         } else {
3441                                 $ref_item{'age'} = "unknown";
3442                         }
3443                 }
3444
3445                 push @tagslist, \%ref_item;
3446         }
3447         close $fd;
3448
3449         return wantarray ? @tagslist : \@tagslist;
3450 }
3451
3452 ## ----------------------------------------------------------------------
3453 ## filesystem-related functions
3454
3455 sub get_file_owner {
3456         my $path = shift;
3457
3458         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3459         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3460         if (!defined $gcos) {
3461                 return undef;
3462         }
3463         my $owner = $gcos;
3464         $owner =~ s/[,;].*$//;
3465         return to_utf8($owner);
3466 }
3467
3468 # assume that file exists
3469 sub insert_file {
3470         my $filename = shift;
3471
3472         open my $fd, '<', $filename;
3473         print map { to_utf8($_) } <$fd>;
3474         close $fd;
3475 }
3476
3477 ## ......................................................................
3478 ## mimetype related functions
3479
3480 sub mimetype_guess_file {
3481         my $filename = shift;
3482         my $mimemap = shift;
3483         -r $mimemap or return undef;
3484
3485         my %mimemap;
3486         open(my $mh, '<', $mimemap) or return undef;
3487         while (<$mh>) {
3488                 next if m/^#/; # skip comments
3489                 my ($mimetype, $exts) = split(/\t+/);
3490                 if (defined $exts) {
3491                         my @exts = split(/\s+/, $exts);
3492                         foreach my $ext (@exts) {
3493                                 $mimemap{$ext} = $mimetype;
3494                         }
3495                 }
3496         }
3497         close($mh);
3498
3499         $filename =~ /\.([^.]*)$/;
3500         return $mimemap{$1};
3501 }
3502
3503 sub mimetype_guess {
3504         my $filename = shift;
3505         my $mime;
3506         $filename =~ /\./ or return undef;
3507
3508         if ($mimetypes_file) {
3509                 my $file = $mimetypes_file;
3510                 if ($file !~ m!^/!) { # if it is relative path
3511                         # it is relative to project
3512                         $file = "$projectroot/$project/$file";
3513                 }
3514                 $mime = mimetype_guess_file($filename, $file);
3515         }
3516         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3517         return $mime;
3518 }
3519
3520 sub blob_mimetype {
3521         my $fd = shift;
3522         my $filename = shift;
3523
3524         if ($filename) {
3525                 my $mime = mimetype_guess($filename);
3526                 $mime and return $mime;
3527         }
3528
3529         # just in case
3530         return $default_blob_plain_mimetype unless $fd;
3531
3532         if (-T $fd) {
3533                 return 'text/plain';
3534         } elsif (! $filename) {
3535                 return 'application/octet-stream';
3536         } elsif ($filename =~ m/\.png$/i) {
3537                 return 'image/png';
3538         } elsif ($filename =~ m/\.gif$/i) {
3539                 return 'image/gif';
3540         } elsif ($filename =~ m/\.jpe?g$/i) {
3541                 return 'image/jpeg';
3542         } else {
3543                 return 'application/octet-stream';
3544         }
3545 }
3546
3547 sub blob_contenttype {
3548         my ($fd, $file_name, $type) = @_;
3549
3550         $type ||= blob_mimetype($fd, $file_name);
3551         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3552                 $type .= "; charset=$default_text_plain_charset";
3553         }
3554
3555         return $type;
3556 }
3557
3558 # guess file syntax for syntax highlighting; return undef if no highlighting
3559 # the name of syntax can (in the future) depend on syntax highlighter used
3560 sub guess_file_syntax {
3561         my ($highlight, $mimetype, $file_name) = @_;
3562         return undef unless ($highlight && defined $file_name);
3563         my $basename = basename($file_name, '.in');
3564         return $highlight_basename{$basename}
3565                 if exists $highlight_basename{$basename};
3566
3567         $basename =~ /\.([^.]*)$/;
3568         my $ext = $1 or return undef;
3569         return $highlight_ext{$ext}
3570                 if exists $highlight_ext{$ext};
3571
3572         return undef;
3573 }
3574
3575 # run highlighter and return FD of its output,
3576 # or return original FD if no highlighting
3577 sub run_highlighter {
3578         my ($fd, $highlight, $syntax) = @_;
3579         return $fd unless ($highlight && defined $syntax);
3580
3581         close $fd
3582                 or die_error(404, "Reading blob failed");
3583         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3584                   quote_command($highlight_bin).
3585                   " --xhtml --fragment --syntax $syntax |"
3586                 or die_error(500, "Couldn't open file or run syntax highlighter");
3587         return $fd;
3588 }
3589
3590 ## ======================================================================
3591 ## functions printing HTML: header, footer, error page
3592
3593 sub get_page_title {
3594         my $title = to_utf8($site_name);
3595
3596         return $title unless (defined $project);
3597         $title .= " - " . to_utf8($project);
3598
3599         return $title unless (defined $action);
3600         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3601
3602         return $title unless (defined $file_name);
3603         $title .= " - " . esc_path($file_name);
3604         if ($action eq "tree" && $file_name !~ m|/$|) {
3605                 $title .= "/";
3606         }
3607
3608         return $title;
3609 }
3610
3611 # creates "Generating..." page when caching enabled and not in cache
3612 sub git_generating_data_html {
3613         my ($cache, $key, $lock_fh) = @_;
3614
3615         # whitelist of actions that should get "Generating..." page
3616         if (!action_outputs_html($action) ||
3617             browser_is_robot()) {
3618                 return;
3619         }
3620
3621         # Initial delay
3622         if ($generating_options{'startup_delay'} > 0) {
3623                 eval {
3624                         local $SIG{ALRM} = sub { die "alarm clock restart\n" }; # NB: \n required
3625                         alarm $generating_options{'startup_delay'};
3626                         flock($lock_fh, LOCK_SH); # blocking readers lock
3627                         alarm 0;
3628                 };
3629                 if ($@) {
3630                         # propagate unexpected errors
3631                         die $@ if $@ !~ /alarm clock restart/;
3632                 } else {
3633                         # we got response within 'startup_delay' timeout
3634                         return;
3635                 }
3636         }
3637
3638         my $title = "[Generating...] " . get_page_title();
3639         # TODO: the following line of code duplicates the one
3640         # in git_header_html, and it should probably be refactored.
3641         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3642
3643         # Use the trick that 'refresh' HTTP header equivalent (set via http-equiv)
3644         # with timeout of 0 seconds would redirect as soon as page is finished.
3645         # It assumes that browser would display partially received page.
3646         # This "Generating..." redirect page should not be cached (externally).
3647         my %no_cache = (
3648                 # HTTP/1.0
3649                 -Pragma => 'no-cache',
3650                 # HTTP/1.1
3651                 -Cache_Control => join(', ', qw(private no-cache no-store must-revalidate
3652                                                 max-age=0 pre-check=0 post-check=0)),
3653         );
3654         print STDOUT $cgi->header(-type => 'text/html', -charset => 'utf-8',
3655                                   -status=> '200 OK', -expires => 'now',
3656                                   %no_cache);
3657         print STDOUT <<"EOF";
3658 <?xml version="1.0" encoding="utf-8"?>
3659 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
3660                       "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3661 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3662 <!-- git web interface version $version -->
3663 <!-- git core binaries version $git_version -->
3664 <head>
3665 <meta http-equiv="content-type" content="text/html; charset=utf-8" />
3666 <meta http-equiv="refresh" content="0" />
3667 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version" />
3668 <meta name="robots" content="noindex, nofollow" />
3669 <title>$title</title>
3670 </head>
3671 <body>
3672 EOF
3673
3674         local $| = 1; # autoflush
3675         print STDOUT 'Generating...';
3676
3677         my $total_time = 0;
3678         my $interval = $generating_options{'print_interval'} || 1;
3679         my $timeout  = $generating_options{'timeout'};
3680         my $alarm_handler = sub {
3681                 local $! = 1;
3682                 print STDOUT '.';
3683                 $total_time += $interval;
3684                 if ($total_time > $timeout) {
3685                         die "timeout\n";
3686                 }
3687         };
3688         eval {
3689                 local $SIG{ALRM} = $alarm_handler;
3690                 Time::HiRes::alarm($interval, $interval);
3691                 my $lock_acquired;
3692                 do {
3693                         # loop is needed here because SIGALRM (from 'alarm')
3694                         # can interrupt process of acquiring lock
3695                         $lock_acquired = flock($lock_fh, LOCK_SH); # blocking readers lock
3696                 } until ($lock_acquired);
3697                 alarm 0;
3698         };
3699         # It doesn't really matter if we got lock, or timed-out
3700         # but we should re-throw unknown (unexpected) errors
3701         die $@ if ($@ and $@ !~ /timeout/);
3702
3703         print STDOUT <<"EOF";
3704
3705 </body>
3706 </html>
3707 EOF
3708
3709         # after refresh web browser would reload page and send new request
3710         goto DONE_GITWEB;
3711         #exit 0;
3712         #return;
3713 }
3714
3715 sub git_header_html {
3716         my $status = shift || "200 OK";
3717         my $expires = shift;
3718         my %opts = @_;
3719
3720         my $title = get_page_title();
3721         my $content_type;
3722         # require explicit support from the UA if we are to send the page as
3723         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3724         # we have to do this because MSIE sometimes globs '*/*', pretending to
3725         # support xhtml+xml but choking when it gets what it asked for.
3726         # Disable content-type negotiation when caching (use mimetype good for all).
3727         if (!$caching_enabled &&
3728             defined $cgi->http('HTTP_ACCEPT') &&
3729             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3730             $cgi->Accept('application/xhtml+xml') != 0) {
3731                 $content_type = 'application/xhtml+xml';
3732         } else {
3733                 $content_type = 'text/html';
3734         }
3735         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3736                            -status=> $status, -expires => $expires)
3737                 unless ($opts{'-no_http_header'});
3738         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3739         print <<EOF;
3740 <?xml version="1.0" encoding="utf-8"?>
3741 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3742 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3743 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3744 <!-- git core binaries version $git_version -->
3745 <head>
3746 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3747 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3748 <meta name="robots" content="index, nofollow"/>
3749 <title>$title</title>
3750 EOF
3751         # the stylesheet, favicon etc urls won't work correctly with path_info
3752         # unless we set the appropriate base URL
3753         # if caching is enabled we can get it from cache for path_info when it
3754         # is generated without path_info
3755         if ($ENV{'PATH_INFO'} || $caching_enabled) {
3756                 print "<base href=\"".esc_url($base_url)."\" />\n";
3757         }
3758         # print out each stylesheet that exist, providing backwards capability
3759         # for those people who defined $stylesheet in a config file
3760         if (defined $stylesheet) {
3761                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3762         } else {
3763                 foreach my $stylesheet (@stylesheets) {
3764                         next unless $stylesheet;
3765                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3766                 }
3767         }
3768         if (defined $project) {
3769                 my %href_params = get_feed_info();
3770                 if (!exists $href_params{'-title'}) {
3771                         $href_params{'-title'} = 'log';
3772                 }
3773
3774                 foreach my $format qw(RSS Atom) {
3775                         my $type = lc($format);
3776                         my %link_attr = (
3777                                 '-rel' => 'alternate',
3778                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3779                                 '-type' => "application/$type+xml"
3780                         );
3781
3782                         $href_params{'action'} = $type;
3783                         $link_attr{'-href'} = href(%href_params);
3784                         print "<link ".
3785                               "rel=\"$link_attr{'-rel'}\" ".
3786                               "title=\"$link_attr{'-title'}\" ".
3787                               "href=\"$link_attr{'-href'}\" ".
3788                               "type=\"$link_attr{'-type'}\" ".
3789                               "/>\n";
3790
3791                         $href_params{'extra_options'} = '--no-merges';
3792                         $link_attr{'-href'} = href(%href_params);
3793                         $link_attr{'-title'} .= ' (no merges)';
3794                         print "<link ".
3795                               "rel=\"$link_attr{'-rel'}\" ".
3796                               "title=\"$link_attr{'-title'}\" ".
3797                               "href=\"$link_attr{'-href'}\" ".
3798                               "type=\"$link_attr{'-type'}\" ".
3799                               "/>\n";
3800                 }
3801
3802         } else {
3803                 printf('<link rel="alternate" title="%s projects list" '.
3804                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3805                        $site_name, href(project=>undef, action=>"project_index"));
3806                 printf('<link rel="alternate" title="%s projects feeds" '.
3807                        'href="%s" type="text/x-opml" />'."\n",
3808                        $site_name, href(project=>undef, action=>"opml"));
3809         }
3810         if (defined $favicon) {
3811                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3812         }
3813
3814         print "</head>\n" .
3815               "<body>\n";
3816
3817         if (defined $site_header && -f $site_header) {
3818                 insert_file($site_header);
3819         }
3820
3821         print "<div class=\"page_header\">\n" .
3822               $cgi->a({-href => esc_url($logo_url),
3823                        -title => $logo_label},
3824                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3825         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3826         if (defined $project) {
3827                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3828                 if (defined $action) {
3829                         print " / $action";
3830                 }
3831                 print "\n";
3832         }
3833         print "</div>\n";
3834
3835         my $have_search = gitweb_check_feature('search');
3836         if (defined $project && $have_search) {
3837                 if (!defined $searchtext) {
3838                         $searchtext = "";
3839                 }
3840                 my $search_hash;
3841                 if (defined $hash_base) {
3842                         $search_hash = $hash_base;
3843                 } elsif (defined $hash) {
3844                         $search_hash = $hash;
3845                 } else {
3846                         $search_hash = "HEAD";
3847                 }
3848                 my $action = $my_uri;
3849                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3850                 if ($use_pathinfo) {
3851                         $action .= "/".esc_url($project);
3852                 }
3853                 print $cgi->startform(-method => "get", -action => $action) .
3854                       "<div class=\"search\">\n" .
3855                       (!$use_pathinfo &&
3856                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3857                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3858                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3859                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3860                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3861                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3862                       " search:\n",
3863                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3864                       "<span title=\"Extended regular expression\">" .
3865                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3866                                      -checked => $search_use_regexp) .
3867                       "</span>" .
3868                       "</div>" .
3869                       $cgi->end_form() . "\n";
3870         }
3871 }
3872
3873 sub git_footer_html {
3874         my $feed_class = 'rss_logo';
3875
3876         print "<div class=\"page_footer\">\n";
3877         if (defined $project) {
3878                 my $descr = git_get_project_description($project);
3879                 if (defined $descr) {
3880                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3881                 }
3882
3883                 my %href_params = get_feed_info();
3884                 if (!%href_params) {
3885                         $feed_class .= ' generic';
3886                 }
3887                 $href_params{'-title'} ||= 'log';
3888
3889                 foreach my $format qw(RSS Atom) {
3890                         $href_params{'action'} = lc($format);
3891                         print $cgi->a({-href => href(%href_params),
3892                                       -title => "$href_params{'-title'} $format feed",
3893                                       -class => $feed_class}, $format)."\n";
3894                 }
3895
3896         } else {
3897                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3898                               -class => $feed_class}, "OPML") . " ";
3899                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3900                               -class => $feed_class}, "TXT") . "\n";
3901         }
3902         print "</div>\n"; # class="page_footer"
3903
3904         # timing info doesn't make much sense with output (response) caching,
3905         # so when caching is enabled gitweb prints the time of page generation
3906         if ((defined $t0 || $caching_enabled) &&
3907             gitweb_check_feature('timed')) {
3908                 print "<div id=\"generating_info\">\n";
3909                 if ($caching_enabled) {
3910                         print 'This page was generated at '.
3911                               gmtime( time() )." GMT\n";
3912                 } else {
3913                         print 'This page took '.
3914                               '<span id="generating_time" class="time_span">'.
3915                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3916                               ' seconds </span>'.
3917                               ' and '.
3918                               '<span id="generating_cmd">'.
3919                               $number_of_git_cmds.
3920                               '</span> git commands '.
3921                               " to generate.\n";
3922                 }
3923                 print "</div>\n"; # class="page_footer"
3924         }
3925
3926         if (defined $site_footer && -f $site_footer) {
3927                 insert_file($site_footer);
3928         }
3929
3930         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3931         if (!$caching_enabled &&
3932             defined $action && $action eq 'blame_incremental') {
3933                 print qq!<script type="text/javascript">\n!.
3934                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3935                       qq!           "!. href() .qq!");\n!.
3936                       qq!</script>\n!;
3937         } elsif (gitweb_check_feature('javascript-actions')) {
3938                 print qq!<script type="text/javascript">\n!.
3939                       qq!window.onload = fixLinks;\n!.
3940                       qq!</script>\n!;
3941         }
3942
3943         print "</body>\n" .
3944               "</html>";
3945 }
3946
3947 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3948 # Example: die_error(404, 'Hash not found')
3949 # By convention, use the following status codes (as defined in RFC 2616):
3950 # 400: Invalid or missing CGI parameters, or
3951 #      requested object exists but has wrong type.
3952 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3953 #      this server or project.
3954 # 404: Requested object/revision/project doesn't exist.
3955 # 500: The server isn't configured properly, or
3956 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3957 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3958 # 503: The server is currently unavailable (because it is overloaded,
3959 #      or down for maintenance).  Generally, this is a temporary state.
3960 sub die_error {
3961         my $status = shift || 500;
3962         my $error = esc_html(shift) || "Internal Server Error";
3963         my $extra = shift;
3964         my %opts = @_;
3965
3966         my %http_responses = (
3967                 400 => '400 Bad Request',
3968                 403 => '403 Forbidden',
3969                 404 => '404 Not Found',
3970                 500 => '500 Internal Server Error',
3971                 503 => '503 Service Unavailable',
3972         );
3973
3974         # Do not cache error pages
3975         capture_stop($cache, $capture) if ($capture && $caching_enabled);
3976
3977         git_header_html($http_responses{$status}, undef, %opts);
3978         print <<EOF;
3979 <div class="page_body">
3980 <br /><br />
3981 $status - $error
3982 <br />
3983 EOF
3984         if (defined $extra) {
3985                 print "<hr />\n" .
3986                       "$extra\n";
3987         }
3988         print "</div>\n";
3989
3990         git_footer_html();
3991         goto DONE_GITWEB
3992                 unless ($opts{'-error_handler'});
3993 }
3994
3995 ## ----------------------------------------------------------------------
3996 ## functions printing or outputting HTML: navigation
3997
3998 sub git_print_page_nav {
3999         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4000         $extra = '' if !defined $extra; # pager or formats
4001
4002         my @navs = qw(summary shortlog log commit commitdiff tree);
4003         if ($suppress) {
4004                 @navs = grep { $_ ne $suppress } @navs;
4005         }
4006
4007         my %arg = map { $_ => {action=>$_} } @navs;
4008         if (defined $head) {
4009                 for (qw(commit commitdiff)) {
4010                         $arg{$_}{'hash'} = $head;
4011                 }
4012                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4013                         for (qw(shortlog log)) {
4014                                 $arg{$_}{'hash'} = $head;
4015                         }
4016                 }
4017         }
4018
4019         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4020         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4021
4022         my @actions = gitweb_get_feature('actions');
4023         my %repl = (
4024                 '%' => '%',
4025                 'n' => $project,         # project name
4026                 'f' => $git_dir,         # project path within filesystem
4027                 'h' => $treehead || '',  # current hash ('h' parameter)
4028                 'b' => $treebase || '',  # hash base ('hb' parameter)
4029         );
4030         while (@actions) {
4031                 my ($label, $link, $pos) = splice(@actions,0,3);
4032                 # insert
4033                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4034                 # munch munch
4035                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4036                 $arg{$label}{'_href'} = $link;
4037         }
4038
4039         print "<div class=\"page_nav\">\n" .
4040                 (join " | ",
4041                  map { $_ eq $current ?
4042                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4043                  } @navs);
4044         print "<br/>\n$extra<br/>\n" .
4045               "</div>\n";
4046 }
4047
4048 sub format_paging_nav {
4049         my ($action, $page, $has_next_link) = @_;
4050         my $paging_nav;
4051
4052
4053         if ($page > 0) {
4054                 $paging_nav .=
4055                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4056                         " &sdot; " .
4057                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4058                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4059         } else {
4060                 $paging_nav .= "first &sdot; prev";
4061         }
4062
4063         if ($has_next_link) {
4064                 $paging_nav .= " &sdot; " .
4065                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4066                                  -accesskey => "n", -title => "Alt-n"}, "next");
4067         } else {
4068                 $paging_nav .= " &sdot; next";
4069         }
4070
4071         return $paging_nav;
4072 }
4073
4074 ## ......................................................................
4075 ## functions printing or outputting HTML: div
4076
4077 sub git_print_header_div {
4078         my ($action, $title, $hash, $hash_base) = @_;
4079         my %args = ();
4080
4081         $args{'action'} = $action;
4082         $args{'hash'} = $hash if $hash;
4083         $args{'hash_base'} = $hash_base if $hash_base;
4084
4085         print "<div class=\"header\">\n" .
4086               $cgi->a({-href => href(%args), -class => "title"},
4087               $title ? $title : $action) .
4088               "\n</div>\n";
4089 }
4090
4091 sub print_local_time {
4092         print format_local_time(@_);
4093 }
4094
4095 sub format_local_time {
4096         my $localtime = '';
4097         my %date = @_;
4098         if ($date{'hour_local'} < 6) {
4099                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
4100                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4101         } else {
4102                 $localtime .= sprintf(" (%02d:%02d %s)",
4103                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
4104         }
4105
4106         return $localtime;
4107 }
4108
4109 # Outputs the author name and date in long form
4110 sub git_print_authorship {
4111         my $co = shift;
4112         my %opts = @_;
4113         my $tag = $opts{-tag} || 'div';
4114         my $author = $co->{'author_name'};
4115
4116         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4117         print "<$tag class=\"author_date\">" .
4118               format_search_author($author, "author", esc_html($author)) .
4119               " [$ad{'rfc2822'}";
4120         print_local_time(%ad) if ($opts{-localtime});
4121         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
4122                   . "</$tag>\n";
4123 }
4124
4125 # Outputs table rows containing the full author or committer information,
4126 # in the format expected for 'commit' view (& similar).
4127 # Parameters are a commit hash reference, followed by the list of people
4128 # to output information for. If the list is empty it defaults to both
4129 # author and committer.
4130 sub git_print_authorship_rows {
4131         my $co = shift;
4132         # too bad we can't use @people = @_ || ('author', 'committer')
4133         my @people = @_;
4134         @people = ('author', 'committer') unless @people;
4135         foreach my $who (@people) {
4136                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4137                 print "<tr><td>$who</td><td>" .
4138                       format_search_author($co->{"${who}_name"}, $who,
4139                                esc_html($co->{"${who}_name"})) . " " .
4140                       format_search_author($co->{"${who}_email"}, $who,
4141                                esc_html("<" . $co->{"${who}_email"} . ">")) .
4142                       "</td><td rowspan=\"2\">" .
4143                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4144                       "</td></tr>\n" .
4145                       "<tr>" .
4146                       "<td></td><td> $wd{'rfc2822'}";
4147                 print_local_time(%wd);
4148                 print "</td>" .
4149                       "</tr>\n";
4150         }
4151 }
4152
4153 sub git_print_page_path {
4154         my $name = shift;
4155         my $type = shift;
4156         my $hb = shift;
4157
4158
4159         print "<div class=\"page_path\">";
4160         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4161                       -title => 'tree root'}, to_utf8("[$project]"));
4162         print " / ";
4163         if (defined $name) {
4164                 my @dirname = split '/', $name;
4165                 my $basename = pop @dirname;
4166                 my $fullname = '';
4167
4168                 foreach my $dir (@dirname) {
4169                         $fullname .= ($fullname ? '/' : '') . $dir;
4170                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4171                                                      hash_base=>$hb),
4172                                       -title => $fullname}, esc_path($dir));
4173                         print " / ";
4174                 }
4175                 if (defined $type && $type eq 'blob') {
4176                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4177                                                      hash_base=>$hb),
4178                                       -title => $name}, esc_path($basename));
4179                 } elsif (defined $type && $type eq 'tree') {
4180                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4181                                                      hash_base=>$hb),
4182                                       -title => $name}, esc_path($basename));
4183                         print " / ";
4184                 } else {
4185                         print esc_path($basename);
4186                 }
4187         }
4188         print "<br/></div>\n";
4189 }
4190
4191 sub git_print_log {
4192         my $log = shift;
4193         my %opts = @_;
4194
4195         if ($opts{'-remove_title'}) {
4196                 # remove title, i.e. first line of log
4197                 shift @$log;
4198         }
4199         # remove leading empty lines
4200         while (defined $log->[0] && $log->[0] eq "") {
4201                 shift @$log;
4202         }
4203
4204         # print log
4205         my $signoff = 0;
4206         my $empty = 0;
4207         foreach my $line (@$log) {
4208                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
4209                         $signoff = 1;
4210                         $empty = 0;
4211                         if (! $opts{'-remove_signoff'}) {
4212                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4213                                 next;
4214                         } else {
4215                                 # remove signoff lines
4216                                 next;
4217                         }
4218                 } else {
4219                         $signoff = 0;
4220                 }
4221
4222                 # print only one empty line
4223                 # do not print empty line after signoff
4224                 if ($line eq "") {
4225                         next if ($empty || $signoff);
4226                         $empty = 1;
4227                 } else {
4228                         $empty = 0;
4229                 }
4230
4231                 print format_log_line_html($line) . "<br/>\n";
4232         }
4233
4234         if ($opts{'-final_empty_line'}) {
4235                 # end with single empty line
4236                 print "<br/>\n" unless $empty;
4237         }
4238 }
4239
4240 # return link target (what link points to)
4241 sub git_get_link_target {
4242         my $hash = shift;
4243         my $link_target;
4244
4245         # read link
4246         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4247                 or return;
4248         {
4249                 local $/ = undef;
4250                 $link_target = <$fd>;
4251         }
4252         close $fd
4253                 or return;
4254
4255         return $link_target;
4256 }
4257
4258 # given link target, and the directory (basedir) the link is in,
4259 # return target of link relative to top directory (top tree);
4260 # return undef if it is not possible (including absolute links).
4261 sub normalize_link_target {
4262         my ($link_target, $basedir) = @_;
4263
4264         # absolute symlinks (beginning with '/') cannot be normalized
4265         return if (substr($link_target, 0, 1) eq '/');
4266
4267         # normalize link target to path from top (root) tree (dir)
4268         my $path;
4269         if ($basedir) {
4270                 $path = $basedir . '/' . $link_target;
4271         } else {
4272                 # we are in top (root) tree (dir)
4273                 $path = $link_target;
4274         }
4275
4276         # remove //, /./, and /../
4277         my @path_parts;
4278         foreach my $part (split('/', $path)) {
4279                 # discard '.' and ''
4280                 next if (!$part || $part eq '.');
4281                 # handle '..'
4282                 if ($part eq '..') {
4283                         if (@path_parts) {
4284                                 pop @path_parts;
4285                         } else {
4286                                 # link leads outside repository (outside top dir)
4287                                 return;
4288                         }
4289                 } else {
4290                         push @path_parts, $part;
4291                 }
4292         }
4293         $path = join('/', @path_parts);
4294
4295         return $path;
4296 }
4297
4298 # print tree entry (row of git_tree), but without encompassing <tr> element
4299 sub git_print_tree_entry {
4300         my ($t, $basedir, $hash_base, $have_blame) = @_;
4301
4302         my %base_key = ();
4303         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4304
4305         # The format of a table row is: mode list link.  Where mode is
4306         # the mode of the entry, list is the name of the entry, an href,
4307         # and link is the action links of the entry.
4308
4309         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4310         if (exists $t->{'size'}) {
4311                 print "<td class=\"size\">$t->{'size'}</td>\n";
4312         }
4313         if ($t->{'type'} eq "blob") {
4314                 print "<td class=\"list\">" .
4315                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4316                                                file_name=>"$basedir$t->{'name'}", %base_key),
4317                                 -class => "list"}, esc_path($t->{'name'}));
4318                 if (S_ISLNK(oct $t->{'mode'})) {
4319                         my $link_target = git_get_link_target($t->{'hash'});
4320                         if ($link_target) {
4321                                 my $norm_target = normalize_link_target($link_target, $basedir);
4322                                 if (defined $norm_target) {
4323                                         print " -> " .
4324                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4325                                                                      file_name=>$norm_target),
4326                                                        -title => $norm_target}, esc_path($link_target));
4327                                 } else {
4328                                         print " -> " . esc_path($link_target);
4329                                 }
4330                         }
4331                 }
4332                 print "</td>\n";
4333                 print "<td class=\"link\">";
4334                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4335                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4336                               "blob");
4337                 if ($have_blame) {
4338                         print " | " .
4339                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4340                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4341                                       "blame");
4342                 }
4343                 if (defined $hash_base) {
4344                         print " | " .
4345                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4346                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4347                                       "history");
4348                 }
4349                 print " | " .
4350                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4351                                                file_name=>"$basedir$t->{'name'}")},
4352                                 "raw");
4353                 print "</td>\n";
4354
4355         } elsif ($t->{'type'} eq "tree") {
4356                 print "<td class=\"list\">";
4357                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4358                                              file_name=>"$basedir$t->{'name'}",
4359                                              %base_key)},
4360                               esc_path($t->{'name'}));
4361                 print "</td>\n";
4362                 print "<td class=\"link\">";
4363                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4364                                              file_name=>"$basedir$t->{'name'}",
4365                                              %base_key)},
4366                               "tree");
4367                 if (defined $hash_base) {
4368                         print " | " .
4369                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4370                                                      file_name=>"$basedir$t->{'name'}")},
4371                                       "history");
4372                 }
4373                 print "</td>\n";
4374         } else {
4375                 # unknown object: we can only present history for it
4376                 # (this includes 'commit' object, i.e. submodule support)
4377                 print "<td class=\"list\">" .
4378                       esc_path($t->{'name'}) .
4379                       "</td>\n";
4380                 print "<td class=\"link\">";
4381                 if (defined $hash_base) {
4382                         print $cgi->a({-href => href(action=>"history",
4383                                                      hash_base=>$hash_base,
4384                                                      file_name=>"$basedir$t->{'name'}")},
4385                                       "history");
4386                 }
4387                 print "</td>\n";
4388         }
4389 }
4390
4391 ## ......................................................................
4392 ## functions printing large fragments of HTML
4393
4394 # get pre-image filenames for merge (combined) diff
4395 sub fill_from_file_info {
4396         my ($diff, @parents) = @_;
4397
4398         $diff->{'from_file'} = [ ];
4399         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4400         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4401                 if ($diff->{'status'}[$i] eq 'R' ||
4402                     $diff->{'status'}[$i] eq 'C') {
4403                         $diff->{'from_file'}[$i] =
4404                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4405                 }
4406         }
4407
4408         return $diff;
4409 }
4410
4411 # is current raw difftree line of file deletion
4412 sub is_deleted {
4413         my $diffinfo = shift;
4414
4415         return $diffinfo->{'to_id'} eq ('0' x 40);
4416 }
4417
4418 # does patch correspond to [previous] difftree raw line
4419 # $diffinfo  - hashref of parsed raw diff format
4420 # $patchinfo - hashref of parsed patch diff format
4421 #              (the same keys as in $diffinfo)
4422 sub is_patch_split {
4423         my ($diffinfo, $patchinfo) = @_;
4424
4425         return defined $diffinfo && defined $patchinfo
4426                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4427 }
4428
4429
4430 sub git_difftree_body {
4431         my ($difftree, $hash, @parents) = @_;
4432         my ($parent) = $parents[0];
4433         my $have_blame = gitweb_check_feature('blame');
4434         print "<div class=\"list_head\">\n";
4435         if ($#{$difftree} > 10) {
4436                 print(($#{$difftree} + 1) . " files changed:\n");
4437         }
4438         print "</div>\n";
4439
4440         print "<table class=\"" .
4441               (@parents > 1 ? "combined " : "") .
4442               "diff_tree\">\n";
4443
4444         # header only for combined diff in 'commitdiff' view
4445         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4446         if ($has_header) {
4447                 # table header
4448                 print "<thead><tr>\n" .
4449                        "<th></th><th></th>\n"; # filename, patchN link
4450                 for (my $i = 0; $i < @parents; $i++) {
4451                         my $par = $parents[$i];
4452                         print "<th>" .
4453                               $cgi->a({-href => href(action=>"commitdiff",
4454                                                      hash=>$hash, hash_parent=>$par),
4455                                        -title => 'commitdiff to parent number ' .
4456                                                   ($i+1) . ': ' . substr($par,0,7)},
4457                                       $i+1) .
4458                               "&nbsp;</th>\n";
4459                 }
4460                 print "</tr></thead>\n<tbody>\n";
4461         }
4462
4463         my $alternate = 1;
4464         my $patchno = 0;
4465         foreach my $line (@{$difftree}) {
4466                 my $diff = parsed_difftree_line($line);
4467
4468                 if ($alternate) {
4469                         print "<tr class=\"dark\">\n";
4470                 } else {
4471                         print "<tr class=\"light\">\n";
4472                 }
4473                 $alternate ^= 1;
4474
4475                 if (exists $diff->{'nparents'}) { # combined diff
4476
4477                         fill_from_file_info($diff, @parents)
4478                                 unless exists $diff->{'from_file'};
4479
4480                         if (!is_deleted($diff)) {
4481                                 # file exists in the result (child) commit
4482                                 print "<td>" .
4483                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4484                                                              file_name=>$diff->{'to_file'},
4485                                                              hash_base=>$hash),
4486                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4487                                       "</td>\n";
4488                         } else {
4489                                 print "<td>" .
4490                                       esc_path($diff->{'to_file'}) .
4491                                       "</td>\n";
4492                         }
4493
4494                         if ($action eq 'commitdiff') {
4495                                 # link to patch
4496                                 $patchno++;
4497                                 print "<td class=\"link\">" .
4498                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4499                                       " | " .
4500                                       "</td>\n";
4501                         }
4502
4503                         my $has_history = 0;
4504                         my $not_deleted = 0;
4505                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4506                                 my $hash_parent = $parents[$i];
4507                                 my $from_hash = $diff->{'from_id'}[$i];
4508                                 my $from_path = $diff->{'from_file'}[$i];
4509                                 my $status = $diff->{'status'}[$i];
4510
4511                                 $has_history ||= ($status ne 'A');
4512                                 $not_deleted ||= ($status ne 'D');
4513
4514                                 if ($status eq 'A') {
4515                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4516                                 } elsif ($status eq 'D') {
4517                                         print "<td class=\"link\">" .
4518                                               $cgi->a({-href => href(action=>"blob",
4519                                                                      hash_base=>$hash,
4520                                                                      hash=>$from_hash,
4521                                                                      file_name=>$from_path)},
4522                                                       "blob" . ($i+1)) .
4523                                               " | </td>\n";
4524                                 } else {
4525                                         if ($diff->{'to_id'} eq $from_hash) {
4526                                                 print "<td class=\"link nochange\">";
4527                                         } else {
4528                                                 print "<td class=\"link\">";
4529                                         }
4530                                         print $cgi->a({-href => href(action=>"blobdiff",
4531                                                                      hash=>$diff->{'to_id'},
4532                                                                      hash_parent=>$from_hash,
4533                                                                      hash_base=>$hash,
4534                                                                      hash_parent_base=>$hash_parent,
4535                                                                      file_name=>$diff->{'to_file'},
4536                                                                      file_parent=>$from_path)},
4537                                                       "diff" . ($i+1)) .
4538                                               " | </td>\n";
4539                                 }
4540                         }
4541
4542                         print "<td class=\"link\">";
4543                         if ($not_deleted) {
4544                                 print $cgi->a({-href => href(action=>"blob",
4545                                                              hash=>$diff->{'to_id'},
4546                                                              file_name=>$diff->{'to_file'},
4547                                                              hash_base=>$hash)},
4548                                               "blob");
4549                                 print " | " if ($has_history);
4550                         }
4551                         if ($has_history) {
4552                                 print $cgi->a({-href => href(action=>"history",
4553                                                              file_name=>$diff->{'to_file'},
4554                                                              hash_base=>$hash)},
4555                                               "history");
4556                         }
4557                         print "</td>\n";
4558
4559                         print "</tr>\n";
4560                         next; # instead of 'else' clause, to avoid extra indent
4561                 }
4562                 # else ordinary diff
4563
4564                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4565                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4566                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4567                         $to_mode_oct = oct $diff->{'to_mode'};
4568                         if (S_ISREG($to_mode_oct)) { # only for regular file
4569                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4570                         }
4571                         $to_file_type = file_type($diff->{'to_mode'});
4572                 }
4573                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4574                         $from_mode_oct = oct $diff->{'from_mode'};
4575                         if (S_ISREG($to_mode_oct)) { # only for regular file
4576                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4577                         }
4578                         $from_file_type = file_type($diff->{'from_mode'});
4579                 }
4580
4581                 if ($diff->{'status'} eq "A") { # created
4582                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4583                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4584                         $mode_chng   .= "]</span>";
4585                         print "<td>";
4586                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4587                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4588                                       -class => "list"}, esc_path($diff->{'file'}));
4589                         print "</td>\n";
4590                         print "<td>$mode_chng</td>\n";
4591                         print "<td class=\"link\">";
4592                         if ($action eq 'commitdiff') {
4593                                 # link to patch
4594                                 $patchno++;
4595                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4596                                 print " | ";
4597                         }
4598                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4599                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4600                                       "blob");
4601                         print "</td>\n";
4602
4603                 } elsif ($diff->{'status'} eq "D") { # deleted
4604                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4605                         print "<td>";
4606                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4607                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4608                                        -class => "list"}, esc_path($diff->{'file'}));
4609                         print "</td>\n";
4610                         print "<td>$mode_chng</td>\n";
4611                         print "<td class=\"link\">";
4612                         if ($action eq 'commitdiff') {
4613                                 # link to patch
4614                                 $patchno++;
4615                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4616                                 print " | ";
4617                         }
4618                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4619                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4620                                       "blob") . " | ";
4621                         if ($have_blame) {
4622                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4623                                                              file_name=>$diff->{'file'})},
4624                                               "blame") . " | ";
4625                         }
4626                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4627                                                      file_name=>$diff->{'file'})},
4628                                       "history");
4629                         print "</td>\n";
4630
4631                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4632                         my $mode_chnge = "";
4633                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4634                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4635                                 if ($from_file_type ne $to_file_type) {
4636                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4637                                 }
4638                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4639                                         if ($from_mode_str && $to_mode_str) {
4640                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4641                                         } elsif ($to_mode_str) {
4642                                                 $mode_chnge .= " mode: $to_mode_str";
4643                                         }
4644                                 }
4645                                 $mode_chnge .= "]</span>\n";
4646                         }
4647                         print "<td>";
4648                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4649                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4650                                       -class => "list"}, esc_path($diff->{'file'}));
4651                         print "</td>\n";
4652                         print "<td>$mode_chnge</td>\n";
4653                         print "<td class=\"link\">";
4654                         if ($action eq 'commitdiff') {
4655                                 # link to patch
4656                                 $patchno++;
4657                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4658                                       " | ";
4659                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4660                                 # "commit" view and modified file (not onlu mode changed)
4661                                 print $cgi->a({-href => href(action=>"blobdiff",
4662                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4663                                                              hash_base=>$hash, hash_parent_base=>$parent,
4664                                                              file_name=>$diff->{'file'})},
4665                                               "diff") .
4666                                       " | ";
4667                         }
4668                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4669                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4670                                        "blob") . " | ";
4671                         if ($have_blame) {
4672                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4673                                                              file_name=>$diff->{'file'})},
4674                                               "blame") . " | ";
4675                         }
4676                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4677                                                      file_name=>$diff->{'file'})},
4678                                       "history");
4679                         print "</td>\n";
4680
4681                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4682                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4683                         my $nstatus = $status_name{$diff->{'status'}};
4684                         my $mode_chng = "";
4685                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4686                                 # mode also for directories, so we cannot use $to_mode_str
4687                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4688                         }
4689                         print "<td>" .
4690                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4691                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4692                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4693                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4694                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4695                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4696                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4697                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4698                               "<td class=\"link\">";
4699                         if ($action eq 'commitdiff') {
4700                                 # link to patch
4701                                 $patchno++;
4702                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4703                                       " | ";
4704                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4705                                 # "commit" view and modified file (not only pure rename or copy)
4706                                 print $cgi->a({-href => href(action=>"blobdiff",
4707                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4708                                                              hash_base=>$hash, hash_parent_base=>$parent,
4709                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4710                                               "diff") .
4711                                       " | ";
4712                         }
4713                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4714                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4715                                       "blob") . " | ";
4716                         if ($have_blame) {
4717                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4718                                                              file_name=>$diff->{'to_file'})},
4719                                               "blame") . " | ";
4720                         }
4721                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4722                                                     file_name=>$diff->{'to_file'})},
4723                                       "history");
4724                         print "</td>\n";
4725
4726                 } # we should not encounter Unmerged (U) or Unknown (X) status
4727                 print "</tr>\n";
4728         }
4729         print "</tbody>" if $has_header;
4730         print "</table>\n";
4731 }
4732
4733 sub git_patchset_body {
4734         my ($fd, $difftree, $hash, @hash_parents) = @_;
4735         my ($hash_parent) = $hash_parents[0];
4736
4737         my $is_combined = (@hash_parents > 1);
4738         my $patch_idx = 0;
4739         my $patch_number = 0;
4740         my $patch_line;
4741         my $diffinfo;
4742         my $to_name;
4743         my (%from, %to);
4744
4745         print "<div class=\"patchset\">\n";
4746
4747         # skip to first patch
4748         while ($patch_line = <$fd>) {
4749                 chomp $patch_line;
4750
4751                 last if ($patch_line =~ m/^diff /);
4752         }
4753
4754  PATCH:
4755         while ($patch_line) {
4756
4757                 # parse "git diff" header line
4758                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4759                         # $1 is from_name, which we do not use
4760                         $to_name = unquote($2);
4761                         $to_name =~ s!^b/!!;
4762                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4763                         # $1 is 'cc' or 'combined', which we do not use
4764                         $to_name = unquote($2);
4765                 } else {
4766                         $to_name = undef;
4767                 }
4768
4769                 # check if current patch belong to current raw line
4770                 # and parse raw git-diff line if needed
4771                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4772                         # this is continuation of a split patch
4773                         print "<div class=\"patch cont\">\n";
4774                 } else {
4775                         # advance raw git-diff output if needed
4776                         $patch_idx++ if defined $diffinfo;
4777
4778                         # read and prepare patch information
4779                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4780
4781                         # compact combined diff output can have some patches skipped
4782                         # find which patch (using pathname of result) we are at now;
4783                         if ($is_combined) {
4784                                 while ($to_name ne $diffinfo->{'to_file'}) {
4785                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4786                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4787                                               "</div>\n";  # class="patch"
4788
4789                                         $patch_idx++;
4790                                         $patch_number++;
4791
4792                                         last if $patch_idx > $#$difftree;
4793                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4794                                 }
4795                         }
4796
4797                         # modifies %from, %to hashes
4798                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4799
4800                         # this is first patch for raw difftree line with $patch_idx index
4801                         # we index @$difftree array from 0, but number patches from 1
4802                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4803                 }
4804
4805                 # git diff header
4806                 #assert($patch_line =~ m/^diff /) if DEBUG;
4807                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4808                 $patch_number++;
4809                 # print "git diff" header
4810                 print format_git_diff_header_line($patch_line, $diffinfo,
4811                                                   \%from, \%to);
4812
4813                 # print extended diff header
4814                 print "<div class=\"diff extended_header\">\n";
4815         EXTENDED_HEADER:
4816                 while ($patch_line = <$fd>) {
4817                         chomp $patch_line;
4818
4819                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4820
4821                         print format_extended_diff_header_line($patch_line, $diffinfo,
4822                                                                \%from, \%to);
4823                 }
4824                 print "</div>\n"; # class="diff extended_header"
4825
4826                 # from-file/to-file diff header
4827                 if (! $patch_line) {
4828                         print "</div>\n"; # class="patch"
4829                         last PATCH;
4830                 }
4831                 next PATCH if ($patch_line =~ m/^diff /);
4832                 #assert($patch_line =~ m/^---/) if DEBUG;
4833
4834                 my $last_patch_line = $patch_line;
4835                 $patch_line = <$fd>;
4836                 chomp $patch_line;
4837                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4838
4839                 print format_diff_from_to_header($last_patch_line, $patch_line,
4840                                                  $diffinfo, \%from, \%to,
4841                                                  @hash_parents);
4842
4843                 # the patch itself
4844         LINE:
4845                 while ($patch_line = <$fd>) {
4846                         chomp $patch_line;
4847
4848                         next PATCH if ($patch_line =~ m/^diff /);
4849
4850                         print format_diff_line($patch_line, \%from, \%to);
4851                 }
4852
4853         } continue {
4854                 print "</div>\n"; # class="patch"
4855         }
4856
4857         # for compact combined (--cc) format, with chunk and patch simplification
4858         # the patchset might be empty, but there might be unprocessed raw lines
4859         for (++$patch_idx if $patch_number > 0;
4860              $patch_idx < @$difftree;
4861              ++$patch_idx) {
4862                 # read and prepare patch information
4863                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4864
4865                 # generate anchor for "patch" links in difftree / whatchanged part
4866                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4867                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4868                       "</div>\n";  # class="patch"
4869
4870                 $patch_number++;
4871         }
4872
4873         if ($patch_number == 0) {
4874                 if (@hash_parents > 1) {
4875                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4876                 } else {
4877                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4878                 }
4879         }
4880
4881         print "</div>\n"; # class="patchset"
4882 }
4883
4884 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4885
4886 # fills project list info (age, description, owner, forks) for each
4887 # project in the list, removing invalid projects from returned list
4888 # NOTE: modifies $projlist, but does not remove entries from it
4889 sub fill_project_list_info {
4890         my ($projlist, $check_forks) = @_;
4891         my @projects;
4892
4893         my $show_ctags = gitweb_check_feature('ctags');
4894  PROJECT:
4895         foreach my $pr (@$projlist) {
4896                 my (@activity) = git_get_last_activity($pr->{'path'});
4897                 unless (@activity) {
4898                         next PROJECT;
4899                 }
4900                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4901                 if (!defined $pr->{'descr'}) {
4902                         my $descr = git_get_project_description($pr->{'path'}) || "";
4903                         $descr = to_utf8($descr);
4904                         $pr->{'descr_long'} = $descr;
4905                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4906                 }
4907                 if (!defined $pr->{'owner'}) {
4908                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4909                 }
4910                 if ($check_forks) {
4911                         my $pname = $pr->{'path'};
4912                         if (($pname =~ s/\.git$//) &&
4913                             ($pname !~ /\/$/) &&
4914                             (-d "$projectroot/$pname")) {
4915                                 $pr->{'forks'} = "-d $projectroot/$pname";
4916                         } else {
4917                                 $pr->{'forks'} = 0;
4918                         }
4919                 }
4920                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4921                 push @projects, $pr;
4922         }
4923
4924         return @projects;
4925 }
4926
4927 # print 'sort by' <th> element, generating 'sort by $name' replay link
4928 # if that order is not selected
4929 sub print_sort_th {
4930         print format_sort_th(@_);
4931 }
4932
4933 sub format_sort_th {
4934         my ($name, $order, $header) = @_;
4935         my $sort_th = "";
4936         $header ||= ucfirst($name);
4937
4938         if ($order eq $name) {
4939                 $sort_th .= "<th>$header</th>\n";
4940         } else {
4941                 $sort_th .= "<th>" .
4942                             $cgi->a({-href => href(-replay=>1, order=>$name),
4943                                      -class => "header"}, $header) .
4944                             "</th>\n";
4945         }
4946
4947         return $sort_th;
4948 }
4949
4950 sub git_project_list_body {
4951         # actually uses global variable $project
4952         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4953
4954         my $check_forks = gitweb_check_feature('forks');
4955         my @projects = fill_project_list_info($projlist, $check_forks);
4956
4957         $order ||= $default_projects_order;
4958         $from = 0 unless defined $from;
4959         $to = $#projects if (!defined $to || $#projects < $to);
4960
4961         my %order_info = (
4962                 project => { key => 'path', type => 'str' },
4963                 descr => { key => 'descr_long', type => 'str' },
4964                 owner => { key => 'owner', type => 'str' },
4965                 age => { key => 'age', type => 'num' }
4966         );
4967         my $oi = $order_info{$order};
4968         if ($oi->{'type'} eq 'str') {
4969                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4970         } else {
4971                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4972         }
4973
4974         my $show_ctags = gitweb_check_feature('ctags');
4975         if ($show_ctags) {
4976                 my %ctags;
4977                 foreach my $p (@projects) {
4978                         foreach my $ct (keys %{$p->{'ctags'}}) {
4979                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4980                         }
4981                 }
4982                 my $cloud = git_populate_project_tagcloud(\%ctags);
4983                 print git_show_project_tagcloud($cloud, 64);
4984         }
4985
4986         print "<table class=\"project_list\">\n";
4987         unless ($no_header) {
4988                 print "<tr>\n";
4989                 if ($check_forks) {
4990                         print "<th></th>\n";
4991                 }
4992                 print_sort_th('project', $order, 'Project');
4993                 print_sort_th('descr', $order, 'Description');
4994                 print_sort_th('owner', $order, 'Owner');
4995                 print_sort_th('age', $order, 'Last Change');
4996                 print "<th></th>\n" . # for links
4997                       "</tr>\n";
4998         }
4999         my $alternate = 1;
5000         my $tagfilter = $cgi->param('by_tag');
5001         for (my $i = $from; $i <= $to; $i++) {
5002                 my $pr = $projects[$i];
5003
5004                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
5005                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
5006                         and not $pr->{'descr_long'} =~ /$searchtext/;
5007                 # Weed out forks or non-matching entries of search
5008                 if ($check_forks) {
5009                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
5010                         $forkbase="^$forkbase" if $forkbase;
5011                         next if not $searchtext and not $tagfilter and $show_ctags
5012                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
5013                 }
5014
5015                 if ($alternate) {
5016                         print "<tr class=\"dark\">\n";
5017                 } else {
5018                         print "<tr class=\"light\">\n";
5019                 }
5020                 $alternate ^= 1;
5021                 if ($check_forks) {
5022                         print "<td>";
5023                         if ($pr->{'forks'}) {
5024                                 print "<!-- $pr->{'forks'} -->\n";
5025                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
5026                         }
5027                         print "</td>\n";
5028                 }
5029                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5030                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
5031                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5032                                         -class => "list", -title => $pr->{'descr_long'}},
5033                                         esc_html($pr->{'descr'})) . "</td>\n" .
5034                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5035                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5036                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
5037                       "<td class=\"link\">" .
5038                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5039                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5040                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5041                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5042                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5043                       "</td>\n" .
5044                       "</tr>\n";
5045         }
5046         if (defined $extra) {
5047                 print "<tr>\n";
5048                 if ($check_forks) {
5049                         print "<td></td>\n";
5050                 }
5051                 print "<td colspan=\"5\">$extra</td>\n" .
5052                       "</tr>\n";
5053         }
5054         print "</table>\n";
5055 }
5056
5057 sub git_log_body {
5058         # uses global variable $project
5059         my ($commitlist, $from, $to, $refs, $extra) = @_;
5060
5061         $from = 0 unless defined $from;
5062         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5063
5064         for (my $i = 0; $i <= $to; $i++) {
5065                 my %co = %{$commitlist->[$i]};
5066                 next if !%co;
5067                 my $commit = $co{'id'};
5068                 my $ref = format_ref_marker($refs, $commit);
5069                 my %ad = parse_date($co{'author_epoch'});
5070                 git_print_header_div('commit',
5071                                "<span class=\"age\">$co{'age_string'}</span>" .
5072                                esc_html($co{'title'}) . $ref,
5073                                $commit);
5074                 print "<div class=\"title_text\">\n" .
5075                       "<div class=\"log_link\">\n" .
5076                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5077                       " | " .
5078                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5079                       " | " .
5080                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5081                       "<br/>\n" .
5082                       "</div>\n";
5083                       git_print_authorship(\%co, -tag => 'span');
5084                       print "<br/>\n</div>\n";
5085
5086                 print "<div class=\"log_body\">\n";
5087                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5088                 print "</div>\n";
5089         }
5090         if ($extra) {
5091                 print "<div class=\"page_nav\">\n";
5092                 print "$extra\n";
5093                 print "</div>\n";
5094         }
5095 }
5096
5097 sub git_shortlog_body {
5098         # uses global variable $project
5099         my ($commitlist, $from, $to, $refs, $extra) = @_;
5100
5101         $from = 0 unless defined $from;
5102         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5103
5104         print "<table class=\"shortlog\">\n";
5105         my $alternate = 1;
5106         for (my $i = $from; $i <= $to; $i++) {
5107                 my %co = %{$commitlist->[$i]};
5108                 my $commit = $co{'id'};
5109                 my $ref = format_ref_marker($refs, $commit);
5110                 if ($alternate) {
5111                         print "<tr class=\"dark\">\n";
5112                 } else {
5113                         print "<tr class=\"light\">\n";
5114                 }
5115                 $alternate ^= 1;
5116                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5117                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5118                       format_author_html('td', \%co, 10) . "<td>";
5119                 print format_subject_html($co{'title'}, $co{'title_short'},
5120                                           href(action=>"commit", hash=>$commit), $ref);
5121                 print "</td>\n" .
5122                       "<td class=\"link\">" .
5123                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5124                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5125                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5126                 my $snapshot_links = format_snapshot_links($commit);
5127                 if (defined $snapshot_links) {
5128                         print " | " . $snapshot_links;
5129                 }
5130                 print "</td>\n" .
5131                       "</tr>\n";
5132         }
5133         if (defined $extra) {
5134                 print "<tr>\n" .
5135                       "<td colspan=\"4\">$extra</td>\n" .
5136                       "</tr>\n";
5137         }
5138         print "</table>\n";
5139 }
5140
5141 sub git_history_body {
5142         # Warning: assumes constant type (blob or tree) during history
5143         my ($commitlist, $from, $to, $refs, $extra,
5144             $file_name, $file_hash, $ftype) = @_;
5145
5146         $from = 0 unless defined $from;
5147         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5148
5149         print "<table class=\"history\">\n";
5150         my $alternate = 1;
5151         for (my $i = $from; $i <= $to; $i++) {
5152                 my %co = %{$commitlist->[$i]};
5153                 if (!%co) {
5154                         next;
5155                 }
5156                 my $commit = $co{'id'};
5157
5158                 my $ref = format_ref_marker($refs, $commit);
5159
5160                 if ($alternate) {
5161                         print "<tr class=\"dark\">\n";
5162                 } else {
5163                         print "<tr class=\"light\">\n";
5164                 }
5165                 $alternate ^= 1;
5166                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5167         # shortlog:   format_author_html('td', \%co, 10)
5168                       format_author_html('td', \%co, 15, 3) . "<td>";
5169                 # originally git_history used chop_str($co{'title'}, 50)
5170                 print format_subject_html($co{'title'}, $co{'title_short'},
5171                                           href(action=>"commit", hash=>$commit), $ref);
5172                 print "</td>\n" .
5173                       "<td class=\"link\">" .
5174                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5175                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5176
5177                 if ($ftype eq 'blob') {
5178                         my $blob_current = $file_hash;
5179                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5180                         if (defined $blob_current && defined $blob_parent &&
5181                                         $blob_current ne $blob_parent) {
5182                                 print " | " .
5183                                         $cgi->a({-href => href(action=>"blobdiff",
5184                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5185                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5186                                                                file_name=>$file_name)},
5187                                                 "diff to current");
5188                         }
5189                 }
5190                 print "</td>\n" .
5191                       "</tr>\n";
5192         }
5193         if (defined $extra) {
5194                 print "<tr>\n" .
5195                       "<td colspan=\"4\">$extra</td>\n" .
5196                       "</tr>\n";
5197         }
5198         print "</table>\n";
5199 }
5200
5201 sub git_tags_body {
5202         # uses global variable $project
5203         my ($taglist, $from, $to, $extra) = @_;
5204         $from = 0 unless defined $from;
5205         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
5206
5207         print "<table class=\"tags\">\n";
5208         my $alternate = 1;
5209         for (my $i = $from; $i <= $to; $i++) {
5210                 my $entry = $taglist->[$i];
5211                 my %tag = %$entry;
5212                 my $comment = $tag{'subject'};
5213                 my $comment_short;
5214                 if (defined $comment) {
5215                         $comment_short = chop_str($comment, 30, 5);
5216                 }
5217                 if ($alternate) {
5218                         print "<tr class=\"dark\">\n";
5219                 } else {
5220                         print "<tr class=\"light\">\n";
5221                 }
5222                 $alternate ^= 1;
5223                 if (defined $tag{'age'}) {
5224                         print "<td><i>$tag{'age'}</i></td>\n";
5225                 } else {
5226                         print "<td></td>\n";
5227                 }
5228                 print "<td>" .
5229                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
5230                                -class => "list name"}, esc_html($tag{'name'})) .
5231                       "</td>\n" .
5232                       "<td>";
5233                 if (defined $comment) {
5234                         print format_subject_html($comment, $comment_short,
5235                                                   href(action=>"tag", hash=>$tag{'id'}));
5236                 }
5237                 print "</td>\n" .
5238                       "<td class=\"selflink\">";
5239                 if ($tag{'type'} eq "tag") {
5240                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
5241                 } else {
5242                         print "&nbsp;";
5243                 }
5244                 print "</td>\n" .
5245                       "<td class=\"link\">" . " | " .
5246                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
5247                 if ($tag{'reftype'} eq "commit") {
5248                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
5249                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
5250                 } elsif ($tag{'reftype'} eq "blob") {
5251                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
5252                 }
5253                 print "</td>\n" .
5254                       "</tr>";
5255         }
5256         if (defined $extra) {
5257                 print "<tr>\n" .
5258                       "<td colspan=\"5\">$extra</td>\n" .
5259                       "</tr>\n";
5260         }
5261         print "</table>\n";
5262 }
5263
5264 sub git_heads_body {
5265         # uses global variable $project
5266         my ($headlist, $head, $from, $to, $extra) = @_;
5267         $from = 0 unless defined $from;
5268         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
5269
5270         print "<table class=\"heads\">\n";
5271         my $alternate = 1;
5272         for (my $i = $from; $i <= $to; $i++) {
5273                 my $entry = $headlist->[$i];
5274                 my %ref = %$entry;
5275                 my $curr = $ref{'id'} eq $head;
5276                 if ($alternate) {
5277                         print "<tr class=\"dark\">\n";
5278                 } else {
5279                         print "<tr class=\"light\">\n";
5280                 }
5281                 $alternate ^= 1;
5282                 print "<td><i>$ref{'age'}</i></td>\n" .
5283                       ($curr ? "<td class=\"current_head\">" : "<td>") .
5284                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
5285                                -class => "list name"},esc_html($ref{'name'})) .
5286                       "</td>\n" .
5287                       "<td class=\"link\">" .
5288                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
5289                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
5290                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
5291                       "</td>\n" .
5292                       "</tr>";
5293         }
5294         if (defined $extra) {
5295                 print "<tr>\n" .
5296                       "<td colspan=\"3\">$extra</td>\n" .
5297                       "</tr>\n";
5298         }
5299         print "</table>\n";
5300 }
5301
5302 sub git_search_grep_body {
5303         my ($commitlist, $from, $to, $extra) = @_;
5304         $from = 0 unless defined $from;
5305         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5306
5307         print "<table class=\"commit_search\">\n";
5308         my $alternate = 1;
5309         for (my $i = $from; $i <= $to; $i++) {
5310                 my %co = %{$commitlist->[$i]};
5311                 if (!%co) {
5312                         next;
5313                 }
5314                 my $commit = $co{'id'};
5315                 if ($alternate) {
5316                         print "<tr class=\"dark\">\n";
5317                 } else {
5318                         print "<tr class=\"light\">\n";
5319                 }
5320                 $alternate ^= 1;
5321                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5322                       format_author_html('td', \%co, 15, 5) .
5323                       "<td>" .
5324                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5325                                -class => "list subject"},
5326                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5327                 my $comment = $co{'comment'};
5328                 foreach my $line (@$comment) {
5329                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5330                                 my ($lead, $match, $trail) = ($1, $2, $3);
5331                                 $match = chop_str($match, 70, 5, 'center');
5332                                 my $contextlen = int((80 - length($match))/2);
5333                                 $contextlen = 30 if ($contextlen > 30);
5334                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5335                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5336
5337                                 $lead  = esc_html($lead);
5338                                 $match = esc_html($match);
5339                                 $trail = esc_html($trail);
5340
5341                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5342                         }
5343                 }
5344                 print "</td>\n" .
5345                       "<td class=\"link\">" .
5346                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5347                       " | " .
5348                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5349                       " | " .
5350                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5351                 print "</td>\n" .
5352                       "</tr>\n";
5353         }
5354         if (defined $extra) {
5355                 print "<tr>\n" .
5356                       "<td colspan=\"3\">$extra</td>\n" .
5357                       "</tr>\n";
5358         }
5359         print "</table>\n";
5360 }
5361
5362 ## ======================================================================
5363 ## ======================================================================
5364 ## actions
5365
5366 sub git_project_list {
5367         my $order = $input_params{'order'};
5368         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5369                 die_error(400, "Unknown order parameter");
5370         }
5371
5372         my @list = git_get_projects_list();
5373         if (!@list) {
5374                 die_error(404, "No projects found");
5375         }
5376
5377         git_header_html();
5378         if (defined $home_text && -f $home_text) {
5379                 print "<div class=\"index_include\">\n";
5380                 insert_file($home_text);
5381                 print "</div>\n";
5382         }
5383         print $cgi->startform(-method => "get") .
5384               "<p class=\"projsearch\">Search:\n" .
5385               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5386               "</p>" .
5387               $cgi->end_form() . "\n";
5388         git_project_list_body(\@list, $order);
5389         git_footer_html();
5390 }
5391
5392 sub git_forks {
5393         my $order = $input_params{'order'};
5394         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5395                 die_error(400, "Unknown order parameter");
5396         }
5397
5398         my @list = git_get_projects_list($project);
5399         if (!@list) {
5400                 die_error(404, "No forks found");
5401         }
5402
5403         git_header_html();
5404         git_print_page_nav('','');
5405         git_print_header_div('summary', "$project forks");
5406         git_project_list_body(\@list, $order);
5407         git_footer_html();
5408 }
5409
5410 sub git_project_index {
5411         my @projects = git_get_projects_list($project);
5412
5413         print $cgi->header(
5414                 -type => 'text/plain',
5415                 -charset => 'utf-8',
5416                 -content_disposition => 'inline; filename="index.aux"');
5417
5418         foreach my $pr (@projects) {
5419                 if (!exists $pr->{'owner'}) {
5420                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5421                 }
5422
5423                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5424                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5425                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5426                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5427                 $path  =~ s/ /\+/g;
5428                 $owner =~ s/ /\+/g;
5429
5430                 print "$path $owner\n";
5431         }
5432 }
5433
5434 sub git_summary {
5435         my $descr = git_get_project_description($project) || "none";
5436         my %co = parse_commit("HEAD");
5437         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5438         my $head = $co{'id'};
5439
5440         my $owner = git_get_project_owner($project);
5441
5442         my $refs = git_get_references();
5443         # These get_*_list functions return one more to allow us to see if
5444         # there are more ...
5445         my @taglist  = git_get_tags_list(16);
5446         my @headlist = git_get_heads_list(16);
5447         my @forklist;
5448         my $check_forks = gitweb_check_feature('forks');
5449
5450         if ($check_forks) {
5451                 @forklist = git_get_projects_list($project);
5452         }
5453
5454         git_header_html();
5455         git_print_page_nav('summary','', $head);
5456
5457         print "<div class=\"title\">&nbsp;</div>\n";
5458         print "<table class=\"projects_list\">\n" .
5459               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5460               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5461         if (defined $cd{'rfc2822'}) {
5462                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5463         }
5464
5465         # use per project git URL list in $projectroot/$project/cloneurl
5466         # or make project git URL from git base URL and project name
5467         my $url_tag = "URL";
5468         my @url_list = git_get_project_url_list($project);
5469         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5470         foreach my $git_url (@url_list) {
5471                 next unless $git_url;
5472                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5473                 $url_tag = "";
5474         }
5475
5476         # Tag cloud
5477         my $show_ctags = gitweb_check_feature('ctags');
5478         if ($show_ctags) {
5479                 my $ctags = git_get_project_ctags($project);
5480                 my $cloud = git_populate_project_tagcloud($ctags);
5481                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5482                 print "</td>\n<td>" unless %$ctags;
5483                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5484                 print "</td>\n<td>" if %$ctags;
5485                 print git_show_project_tagcloud($cloud, 48);
5486                 print "</td></tr>";
5487         }
5488
5489         print "</table>\n";
5490
5491         # If XSS prevention is on, we don't include README.html.
5492         # TODO: Allow a readme in some safe format.
5493         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5494                 print "<div class=\"title\">readme</div>\n" .
5495                       "<div class=\"readme\">\n";
5496                 insert_file("$projectroot/$project/README.html");
5497                 print "\n</div>\n"; # class="readme"
5498         }
5499
5500         # we need to request one more than 16 (0..15) to check if
5501         # those 16 are all
5502         my @commitlist = $head ? parse_commits($head, 17) : ();
5503         if (@commitlist) {
5504                 git_print_header_div('shortlog');
5505                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5506                                   $#commitlist <=  15 ? undef :
5507                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5508         }
5509
5510         if (@taglist) {
5511                 git_print_header_div('tags');
5512                 git_tags_body(\@taglist, 0, 15,
5513                               $#taglist <=  15 ? undef :
5514                               $cgi->a({-href => href(action=>"tags")}, "..."));
5515         }
5516
5517         if (@headlist) {
5518                 git_print_header_div('heads');
5519                 git_heads_body(\@headlist, $head, 0, 15,
5520                                $#headlist <= 15 ? undef :
5521                                $cgi->a({-href => href(action=>"heads")}, "..."));
5522         }
5523
5524         if (@forklist) {
5525                 git_print_header_div('forks');
5526                 git_project_list_body(\@forklist, 'age', 0, 15,
5527                                       $#forklist <= 15 ? undef :
5528                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5529                                       'no_header');
5530         }
5531
5532         git_footer_html();
5533 }
5534
5535 sub git_tag {
5536         my %tag = parse_tag($hash);
5537
5538         if (! %tag) {
5539                 die_error(404, "Unknown tag object");
5540         }
5541
5542         my $head = git_get_head_hash($project);
5543         git_header_html();
5544         git_print_page_nav('','', $head,undef,$head);
5545         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5546         print "<div class=\"title_text\">\n" .
5547               "<table class=\"object_header\">\n" .
5548               "<tr>\n" .
5549               "<td>object</td>\n" .
5550               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5551                                $tag{'object'}) . "</td>\n" .
5552               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5553                                               $tag{'type'}) . "</td>\n" .
5554               "</tr>\n";
5555         if (defined($tag{'author'})) {
5556                 git_print_authorship_rows(\%tag, 'author');
5557         }
5558         print "</table>\n\n" .
5559               "</div>\n";
5560         print "<div class=\"page_body\">";
5561         my $comment = $tag{'comment'};
5562         foreach my $line (@$comment) {
5563                 chomp $line;
5564                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5565         }
5566         print "</div>\n";
5567         git_footer_html();
5568 }
5569
5570 sub git_blame_common {
5571         my $format = shift || 'porcelain';
5572         if ($format eq 'porcelain' && $cgi->param('js') &&
5573             !$caching_enabled) {
5574                 $format = 'incremental';
5575                 $action = 'blame_incremental'; # for page title etc
5576         }
5577
5578         # permissions
5579         gitweb_check_feature('blame')
5580                 or die_error(403, "Blame view not allowed");
5581
5582         # error checking
5583         die_error(400, "No file name given") unless $file_name;
5584         $hash_base ||= git_get_head_hash($project);
5585         die_error(404, "Couldn't find base commit") unless $hash_base;
5586         my %co = parse_commit($hash_base)
5587                 or die_error(404, "Commit not found");
5588         my $ftype = "blob";
5589         if (!defined $hash) {
5590                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5591                         or die_error(404, "Error looking up file");
5592         } else {
5593                 $ftype = git_get_type($hash);
5594                 if ($ftype !~ "blob") {
5595                         die_error(400, "Object is not a blob");
5596                 }
5597         }
5598
5599         my $fd;
5600         if ($format eq 'incremental') {
5601                 # get file contents (as base)
5602                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5603                         or die_error(500, "Open git-cat-file failed");
5604         } elsif ($format eq 'data') {
5605                 # run git-blame --incremental
5606                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5607                         $hash_base, "--", $file_name
5608                         or die_error(500, "Open git-blame --incremental failed");
5609         } else {
5610                 # run git-blame --porcelain
5611                 open $fd, "-|", git_cmd(), "blame", '-p',
5612                         $hash_base, '--', $file_name
5613                         or die_error(500, "Open git-blame --porcelain failed");
5614         }
5615
5616         # incremental blame data returns early
5617         if ($format eq 'data') {
5618                 print $cgi->header(
5619                         -type=>"text/plain", -charset => "utf-8",
5620                         -status=> "200 OK");
5621                 local $| = 1; # output autoflush
5622                 print while <$fd>;
5623                 close $fd
5624                         or print "ERROR $!\n";
5625
5626                 print 'END';
5627                 if (!$caching_enabled &&
5628                     defined $t0 && gitweb_check_feature('timed')) {
5629                         print ' '.
5630                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5631                               ' '.$number_of_git_cmds;
5632                 }
5633                 print "\n";
5634
5635                 return;
5636         }
5637
5638         # page header
5639         git_header_html();
5640         my $formats_nav =
5641                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5642                         "blob") .
5643                 " | ";
5644         if ($format eq 'incremental') {
5645                 $formats_nav .=
5646                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5647                                 "blame") . " (non-incremental)";
5648         } elsif (!$caching_enabled) {
5649                 $formats_nav .=
5650                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5651                                 "blame") . " (incremental)";
5652         }
5653         $formats_nav .=
5654                 " | " .
5655                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5656                         "history") .
5657                 " | " .
5658                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5659                         "HEAD");
5660         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5661         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5662         git_print_page_path($file_name, $ftype, $hash_base);
5663
5664         # page body
5665         if ($format eq 'incremental') {
5666                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5667                       "This page requires JavaScript to run.\n Use ".
5668                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5669                               'this page').
5670                       " instead.\n".
5671                       "</b></center></div>\n</noscript>\n";
5672
5673                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5674         }
5675
5676         print qq!<div class="page_body">\n!;
5677         print qq!<div id="progress_info">... / ...</div>\n!
5678                 if ($format eq 'incremental');
5679         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5680               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5681               qq!<thead>\n!.
5682               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5683               qq!</thead>\n!.
5684               qq!<tbody>\n!;
5685
5686         my @rev_color = qw(light dark);
5687         my $num_colors = scalar(@rev_color);
5688         my $current_color = 0;
5689
5690         if ($format eq 'incremental') {
5691                 my $color_class = $rev_color[$current_color];
5692
5693                 #contents of a file
5694                 my $linenr = 0;
5695         LINE:
5696                 while (my $line = <$fd>) {
5697                         chomp $line;
5698                         $linenr++;
5699
5700                         print qq!<tr id="l$linenr" class="$color_class">!.
5701                               qq!<td class="sha1"><a href=""> </a></td>!.
5702                               qq!<td class="linenr">!.
5703                               qq!<a class="linenr" href="">$linenr</a></td>!;
5704                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5705                         print qq!</tr>\n!;
5706                 }
5707
5708         } else { # porcelain, i.e. ordinary blame
5709                 my %metainfo = (); # saves information about commits
5710
5711                 # blame data
5712         LINE:
5713                 while (my $line = <$fd>) {
5714                         chomp $line;
5715                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5716                         # no <lines in group> for subsequent lines in group of lines
5717                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5718                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5719                         if (!exists $metainfo{$full_rev}) {
5720                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5721                         }
5722                         my $meta = $metainfo{$full_rev};
5723                         my $data;
5724                         while ($data = <$fd>) {
5725                                 chomp $data;
5726                                 last if ($data =~ s/^\t//); # contents of line
5727                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5728                                         $meta->{$1} = $2 unless exists $meta->{$1};
5729                                 }
5730                                 if ($data =~ /^previous /) {
5731                                         $meta->{'nprevious'}++;
5732                                 }
5733                         }
5734                         my $short_rev = substr($full_rev, 0, 8);
5735                         my $author = $meta->{'author'};
5736                         my %date =
5737                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5738                         my $date = $date{'iso-tz'};
5739                         if ($group_size) {
5740                                 $current_color = ($current_color + 1) % $num_colors;
5741                         }
5742                         my $tr_class = $rev_color[$current_color];
5743                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5744                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5745                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5746                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5747                         if ($group_size) {
5748                                 print "<td class=\"sha1\"";
5749                                 print " title=\"". esc_html($author) . ", $date\"";
5750                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5751                                 print ">";
5752                                 print $cgi->a({-href => href(action=>"commit",
5753                                                              hash=>$full_rev,
5754                                                              file_name=>$file_name)},
5755                                               esc_html($short_rev));
5756                                 if ($group_size >= 2) {
5757                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5758                                         if (@author_initials) {
5759                                                 print "<br />" .
5760                                                       esc_html(join('', @author_initials));
5761                                                 #           or join('.', ...)
5762                                         }
5763                                 }
5764                                 print "</td>\n";
5765                         }
5766                         # 'previous' <sha1 of parent commit> <filename at commit>
5767                         if (exists $meta->{'previous'} &&
5768                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5769                                 $meta->{'parent'} = $1;
5770                                 $meta->{'file_parent'} = unquote($2);
5771                         }
5772                         my $linenr_commit =
5773                                 exists($meta->{'parent'}) ?
5774                                 $meta->{'parent'} : $full_rev;
5775                         my $linenr_filename =
5776                                 exists($meta->{'file_parent'}) ?
5777                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5778                         my $blamed = href(action => 'blame',
5779                                           file_name => $linenr_filename,
5780                                           hash_base => $linenr_commit);
5781                         print "<td class=\"linenr\">";
5782                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5783                                         -class => "linenr" },
5784                                       esc_html($lineno));
5785                         print "</td>";
5786                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5787                         print "</tr>\n";
5788                 } # end while
5789
5790         }
5791
5792         # footer
5793         print "</tbody>\n".
5794               "</table>\n"; # class="blame"
5795         print "</div>\n";   # class="blame_body"
5796         close $fd
5797                 or print "Reading blob failed\n";
5798
5799         git_footer_html();
5800 }
5801
5802 sub git_blame {
5803         git_blame_common();
5804 }
5805
5806 sub git_blame_incremental {
5807         git_blame_common(!$caching_enabled ? 'incremental' : undef);
5808 }
5809
5810 sub git_blame_data {
5811         git_blame_common('data');
5812 }
5813
5814 sub git_tags {
5815         my $head = git_get_head_hash($project);
5816         git_header_html();
5817         git_print_page_nav('','', $head,undef,$head);
5818         git_print_header_div('summary', $project);
5819
5820         my @tagslist = git_get_tags_list();
5821         if (@tagslist) {
5822                 git_tags_body(\@tagslist);
5823         }
5824         git_footer_html();
5825 }
5826
5827 sub git_heads {
5828         my $head = git_get_head_hash($project);
5829         git_header_html();
5830         git_print_page_nav('','', $head,undef,$head);
5831         git_print_header_div('summary', $project);
5832
5833         my @headslist = git_get_heads_list();
5834         if (@headslist) {
5835                 git_heads_body(\@headslist, $head);
5836         }
5837         git_footer_html();
5838 }
5839
5840 sub git_blob_plain {
5841         my $type = shift;
5842         my $expires;
5843
5844         if (!defined $hash) {
5845                 if (defined $file_name) {
5846                         my $base = $hash_base || git_get_head_hash($project);
5847                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5848                                 or die_error(404, "Cannot find file");
5849                 } else {
5850                         die_error(400, "No file name defined");
5851                 }
5852         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5853                 # blobs defined by non-textual hash id's can be cached
5854                 $expires = "+1d";
5855         }
5856
5857         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5858                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5859
5860         # content-type (can include charset)
5861         $type = blob_contenttype($fd, $file_name, $type);
5862
5863         # "save as" filename, even when no $file_name is given
5864         my $save_as = "$hash";
5865         if (defined $file_name) {
5866                 $save_as = $file_name;
5867         } elsif ($type =~ m/^text\//) {
5868                 $save_as .= '.txt';
5869         }
5870
5871         # With XSS prevention on, blobs of all types except a few known safe
5872         # ones are served with "Content-Disposition: attachment" to make sure
5873         # they don't run in our security domain.  For certain image types,
5874         # blob view writes an <img> tag referring to blob_plain view, and we
5875         # want to be sure not to break that by serving the image as an
5876         # attachment (though Firefox 3 doesn't seem to care).
5877         my $sandbox = $prevent_xss &&
5878                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5879
5880         print $cgi->header(
5881                 -type => $type,
5882                 -expires => $expires,
5883                 -content_disposition =>
5884                         ($sandbox ? 'attachment' : 'inline')
5885                         . '; filename="' . $save_as . '"');
5886         local $/ = undef;
5887         binmode STDOUT, ':raw';
5888         print <$fd>;
5889         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5890         close $fd;
5891 }
5892
5893 sub git_blob {
5894         my $expires;
5895
5896         if (!defined $hash) {
5897                 if (defined $file_name) {
5898                         my $base = $hash_base || git_get_head_hash($project);
5899                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5900                                 or die_error(404, "Cannot find file");
5901                 } else {
5902                         die_error(400, "No file name defined");
5903                 }
5904         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5905                 # blobs defined by non-textual hash id's can be cached
5906                 $expires = "+1d";
5907         }
5908
5909         my $have_blame = gitweb_check_feature('blame');
5910         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5911                 or die_error(500, "Couldn't cat $file_name, $hash");
5912         my $mimetype = blob_mimetype($fd, $file_name);
5913         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5914         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5915                 close $fd;
5916                 return git_blob_plain($mimetype);
5917         }
5918         # we can have blame only for text/* mimetype
5919         $have_blame &&= ($mimetype =~ m!^text/!);
5920
5921         my $highlight = gitweb_check_feature('highlight');
5922         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5923         $fd = run_highlighter($fd, $highlight, $syntax)
5924                 if $syntax;
5925
5926         git_header_html(undef, $expires);
5927         my $formats_nav = '';
5928         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5929                 if (defined $file_name) {
5930                         if ($have_blame) {
5931                                 $formats_nav .=
5932                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5933                                                 "blame") .
5934                                         " | ";
5935                         }
5936                         $formats_nav .=
5937                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5938                                         "history") .
5939                                 " | " .
5940                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5941                                         "raw") .
5942                                 " | " .
5943                                 $cgi->a({-href => href(action=>"blob",
5944                                                        hash_base=>"HEAD", file_name=>$file_name)},
5945                                         "HEAD");
5946                 } else {
5947                         $formats_nav .=
5948                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5949                                         "raw");
5950                 }
5951                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5952                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5953         } else {
5954                 print "<div class=\"page_nav\">\n" .
5955                       "<br/><br/></div>\n" .
5956                       "<div class=\"title\">$hash</div>\n";
5957         }
5958         git_print_page_path($file_name, "blob", $hash_base);
5959         print "<div class=\"page_body\">\n";
5960         if ($mimetype =~ m!^image/!) {
5961                 print qq!<img type="$mimetype"!;
5962                 if ($file_name) {
5963                         print qq! alt="$file_name" title="$file_name"!;
5964                 }
5965                 print qq! src="! .
5966                       href(action=>"blob_plain", hash=>$hash,
5967                            hash_base=>$hash_base, file_name=>$file_name) .
5968                       qq!" />\n!;
5969         } else {
5970                 my $nr;
5971                 while (my $line = <$fd>) {
5972                         chomp $line;
5973                         $nr++;
5974                         $line = untabify($line);
5975                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5976                                $nr, href(-replay => 1), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5977                 }
5978         }
5979         close $fd
5980                 or print "Reading blob failed.\n";
5981         print "</div>";
5982         git_footer_html();
5983 }
5984
5985 sub git_tree {
5986         if (!defined $hash_base) {
5987                 $hash_base = "HEAD";
5988         }
5989         if (!defined $hash) {
5990                 if (defined $file_name) {
5991                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5992                 } else {
5993                         $hash = $hash_base;
5994                 }
5995         }
5996         die_error(404, "No such tree") unless defined($hash);
5997
5998         my $show_sizes = gitweb_check_feature('show-sizes');
5999         my $have_blame = gitweb_check_feature('blame');
6000
6001         my @entries = ();
6002         {
6003                 local $/ = "\0";
6004                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
6005                         ($show_sizes ? '-l' : ()), @extra_options, $hash
6006                         or die_error(500, "Open git-ls-tree failed");
6007                 @entries = map { chomp; $_ } <$fd>;
6008                 close $fd
6009                         or die_error(404, "Reading tree failed");
6010         }
6011
6012         my $refs = git_get_references();
6013         my $ref = format_ref_marker($refs, $hash_base);
6014         git_header_html();
6015         my $basedir = '';
6016         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6017                 my @views_nav = ();
6018                 if (defined $file_name) {
6019                         push @views_nav,
6020                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6021                                         "history"),
6022                                 $cgi->a({-href => href(action=>"tree",
6023                                                        hash_base=>"HEAD", file_name=>$file_name)},
6024                                         "HEAD"),
6025                 }
6026                 my $snapshot_links = format_snapshot_links($hash);
6027                 if (defined $snapshot_links) {
6028                         # FIXME: Should be available when we have no hash base as well.
6029                         push @views_nav, $snapshot_links;
6030                 }
6031                 git_print_page_nav('tree','', $hash_base, undef, undef,
6032                                    join(' | ', @views_nav));
6033                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
6034         } else {
6035                 undef $hash_base;
6036                 print "<div class=\"page_nav\">\n";
6037                 print "<br/><br/></div>\n";
6038                 print "<div class=\"title\">$hash</div>\n";
6039         }
6040         if (defined $file_name) {
6041                 $basedir = $file_name;
6042                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
6043                         $basedir .= '/';
6044                 }
6045                 git_print_page_path($file_name, 'tree', $hash_base);
6046         }
6047         print "<div class=\"page_body\">\n";
6048         print "<table class=\"tree\">\n";
6049         my $alternate = 1;
6050         # '..' (top directory) link if possible
6051         if (defined $hash_base &&
6052             defined $file_name && $file_name =~ m![^/]+$!) {
6053                 if ($alternate) {
6054                         print "<tr class=\"dark\">\n";
6055                 } else {
6056                         print "<tr class=\"light\">\n";
6057                 }
6058                 $alternate ^= 1;
6059
6060                 my $up = $file_name;
6061                 $up =~ s!/?[^/]+$!!;
6062                 undef $up unless $up;
6063                 # based on git_print_tree_entry
6064                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
6065                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
6066                 print '<td class="list">';
6067                 print $cgi->a({-href => href(action=>"tree",
6068                                              hash_base=>$hash_base,
6069                                              file_name=>$up)},
6070                               "..");
6071                 print "</td>\n";
6072                 print "<td class=\"link\"></td>\n";
6073
6074                 print "</tr>\n";
6075         }
6076         foreach my $line (@entries) {
6077                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
6078
6079                 if ($alternate) {
6080                         print "<tr class=\"dark\">\n";
6081                 } else {
6082                         print "<tr class=\"light\">\n";
6083                 }
6084                 $alternate ^= 1;
6085
6086                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
6087
6088                 print "</tr>\n";
6089         }
6090         print "</table>\n" .
6091               "</div>";
6092         git_footer_html();
6093 }
6094
6095 sub snapshot_name {
6096         my ($project, $hash) = @_;
6097
6098         # path/to/project.git  -> project
6099         # path/to/project/.git -> project
6100         my $name = to_utf8($project);
6101         $name =~ s,([^/])/*\.git$,$1,;
6102         $name = basename($name);
6103         # sanitize name
6104         $name =~ s/[[:cntrl:]]/?/g;
6105
6106         my $ver = $hash;
6107         if ($hash =~ /^[0-9a-fA-F]+$/) {
6108                 # shorten SHA-1 hash
6109                 my $full_hash = git_get_full_hash($project, $hash);
6110                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
6111                         $ver = git_get_short_hash($project, $hash);
6112                 }
6113         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
6114                 # tags don't need shortened SHA-1 hash
6115                 $ver = $1;
6116         } else {
6117                 # branches and other need shortened SHA-1 hash
6118                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
6119                         $ver = $1;
6120                 }
6121                 $ver .= '-' . git_get_short_hash($project, $hash);
6122         }
6123         # in case of hierarchical branch names
6124         $ver =~ s!/!.!g;
6125
6126         # name = project-version_string
6127         $name = "$name-$ver";
6128
6129         return wantarray ? ($name, $name) : $name;
6130 }
6131
6132 sub git_snapshot {
6133         my $format = $input_params{'snapshot_format'};
6134         if (!@snapshot_fmts) {
6135                 die_error(403, "Snapshots not allowed");
6136         }
6137         # default to first supported snapshot format
6138         $format ||= $snapshot_fmts[0];
6139         if ($format !~ m/^[a-z0-9]+$/) {
6140                 die_error(400, "Invalid snapshot format parameter");
6141         } elsif (!exists($known_snapshot_formats{$format})) {
6142                 die_error(400, "Unknown snapshot format");
6143         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
6144                 die_error(403, "Snapshot format not allowed");
6145         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
6146                 die_error(403, "Unsupported snapshot format");
6147         }
6148
6149         my $type = git_get_type("$hash^{}");
6150         if (!$type) {
6151                 die_error(404, 'Object does not exist');
6152         }  elsif ($type eq 'blob') {
6153                 die_error(400, 'Object is not a tree-ish');
6154         }
6155
6156         my ($name, $prefix) = snapshot_name($project, $hash);
6157         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
6158         my $cmd = quote_command(
6159                 git_cmd(), 'archive',
6160                 "--format=$known_snapshot_formats{$format}{'format'}",
6161                 "--prefix=$prefix/", $hash);
6162         if (exists $known_snapshot_formats{$format}{'compressor'}) {
6163                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
6164         }
6165
6166         $filename =~ s/(["\\])/\\$1/g;
6167         print $cgi->header(
6168                 -type => $known_snapshot_formats{$format}{'type'},
6169                 -content_disposition => 'inline; filename="' . $filename . '"',
6170                 -status => '200 OK');
6171
6172         open my $fd, "-|", $cmd
6173                 or die_error(500, "Execute git-archive failed");
6174         binmode STDOUT, ':raw';
6175         print <$fd>;
6176         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
6177         close $fd;
6178 }
6179
6180 sub git_log_generic {
6181         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
6182
6183         my $head = git_get_head_hash($project);
6184         if (!defined $base) {
6185                 $base = $head;
6186         }
6187         if (!defined $page) {
6188                 $page = 0;
6189         }
6190         my $refs = git_get_references();
6191
6192         my $commit_hash = $base;
6193         if (defined $parent) {
6194                 $commit_hash = "$parent..$base";
6195         }
6196         my @commitlist =
6197                 parse_commits($commit_hash, 101, (100 * $page),
6198                               defined $file_name ? ($file_name, "--full-history") : ());
6199
6200         my $ftype;
6201         if (!defined $file_hash && defined $file_name) {
6202                 # some commits could have deleted file in question,
6203                 # and not have it in tree, but one of them has to have it
6204                 for (my $i = 0; $i < @commitlist; $i++) {
6205                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6206                         last if defined $file_hash;
6207                 }
6208         }
6209         if (defined $file_hash) {
6210                 $ftype = git_get_type($file_hash);
6211         }
6212         if (defined $file_name && !defined $ftype) {
6213                 die_error(500, "Unknown type of object");
6214         }
6215         my %co;
6216         if (defined $file_name) {
6217                 %co = parse_commit($base)
6218                         or die_error(404, "Unknown commit object");
6219         }
6220
6221
6222         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
6223         my $next_link = '';
6224         if ($#commitlist >= 100) {
6225                 $next_link =
6226                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6227                                  -accesskey => "n", -title => "Alt-n"}, "next");
6228         }
6229         my $patch_max = gitweb_get_feature('patches');
6230         if ($patch_max && !defined $file_name) {
6231                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6232                         $paging_nav .= " &sdot; " .
6233                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6234                                         "patches");
6235                 }
6236         }
6237
6238         git_header_html();
6239         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
6240         if (defined $file_name) {
6241                 git_print_header_div('commit', esc_html($co{'title'}), $base);
6242         } else {
6243                 git_print_header_div('summary', $project)
6244         }
6245         git_print_page_path($file_name, $ftype, $hash_base)
6246                 if (defined $file_name);
6247
6248         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
6249                      $file_name, $file_hash, $ftype);
6250
6251         git_footer_html();
6252 }
6253
6254 sub git_log {
6255         git_log_generic('log', \&git_log_body,
6256                         $hash, $hash_parent);
6257 }
6258
6259 sub git_commit {
6260         $hash ||= $hash_base || "HEAD";
6261         my %co = parse_commit($hash)
6262             or die_error(404, "Unknown commit object");
6263
6264         my $parent  = $co{'parent'};
6265         my $parents = $co{'parents'}; # listref
6266
6267         # we need to prepare $formats_nav before any parameter munging
6268         my $formats_nav;
6269         if (!defined $parent) {
6270                 # --root commitdiff
6271                 $formats_nav .= '(initial)';
6272         } elsif (@$parents == 1) {
6273                 # single parent commit
6274                 $formats_nav .=
6275                         '(parent: ' .
6276                         $cgi->a({-href => href(action=>"commit",
6277                                                hash=>$parent)},
6278                                 esc_html(substr($parent, 0, 7))) .
6279                         ')';
6280         } else {
6281                 # merge commit
6282                 $formats_nav .=
6283                         '(merge: ' .
6284                         join(' ', map {
6285                                 $cgi->a({-href => href(action=>"commit",
6286                                                        hash=>$_)},
6287                                         esc_html(substr($_, 0, 7)));
6288                         } @$parents ) .
6289                         ')';
6290         }
6291         if (gitweb_check_feature('patches') && @$parents <= 1) {
6292                 $formats_nav .= " | " .
6293                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
6294                                 "patch");
6295         }
6296
6297         if (!defined $parent) {
6298                 $parent = "--root";
6299         }
6300         my @difftree;
6301         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6302                 @diff_opts,
6303                 (@$parents <= 1 ? $parent : '-c'),
6304                 $hash, "--"
6305                 or die_error(500, "Open git-diff-tree failed");
6306         @difftree = map { chomp; $_ } <$fd>;
6307         close $fd or die_error(404, "Reading git-diff-tree failed");
6308
6309         # non-textual hash id's can be cached
6310         my $expires;
6311         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6312                 $expires = "+1d";
6313         }
6314         my $refs = git_get_references();
6315         my $ref = format_ref_marker($refs, $co{'id'});
6316
6317         git_header_html(undef, $expires);
6318         git_print_page_nav('commit', '',
6319                            $hash, $co{'tree'}, $hash,
6320                            $formats_nav);
6321
6322         if (defined $co{'parent'}) {
6323                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6324         } else {
6325                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6326         }
6327         print "<div class=\"title_text\">\n" .
6328               "<table class=\"object_header\">\n";
6329         git_print_authorship_rows(\%co);
6330         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6331         print "<tr>" .
6332               "<td>tree</td>" .
6333               "<td class=\"sha1\">" .
6334               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6335                        class => "list"}, $co{'tree'}) .
6336               "</td>" .
6337               "<td class=\"link\">" .
6338               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6339                       "tree");
6340         my $snapshot_links = format_snapshot_links($hash);
6341         if (defined $snapshot_links) {
6342                 print " | " . $snapshot_links;
6343         }
6344         print "</td>" .
6345               "</tr>\n";
6346
6347         foreach my $par (@$parents) {
6348                 print "<tr>" .
6349                       "<td>parent</td>" .
6350                       "<td class=\"sha1\">" .
6351                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6352                                class => "list"}, $par) .
6353                       "</td>" .
6354                       "<td class=\"link\">" .
6355                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6356                       " | " .
6357                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6358                       "</td>" .
6359                       "</tr>\n";
6360         }
6361         print "</table>".
6362               "</div>\n";
6363
6364         print "<div class=\"page_body\">\n";
6365         git_print_log($co{'comment'});
6366         print "</div>\n";
6367
6368         git_difftree_body(\@difftree, $hash, @$parents);
6369
6370         git_footer_html();
6371 }
6372
6373 sub git_object {
6374         # object is defined by:
6375         # - hash or hash_base alone
6376         # - hash_base and file_name
6377         my $type;
6378
6379         # - hash or hash_base alone
6380         if ($hash || ($hash_base && !defined $file_name)) {
6381                 my $object_id = $hash || $hash_base;
6382
6383                 open my $fd, "-|", quote_command(
6384                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6385                         or die_error(404, "Object does not exist");
6386                 $type = <$fd>;
6387                 chomp $type;
6388                 close $fd
6389                         or die_error(404, "Object does not exist");
6390
6391         # - hash_base and file_name
6392         } elsif ($hash_base && defined $file_name) {
6393                 $file_name =~ s,/+$,,;
6394
6395                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6396                         or die_error(404, "Base object does not exist");
6397
6398                 # here errors should not hapen
6399                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6400                         or die_error(500, "Open git-ls-tree failed");
6401                 my $line = <$fd>;
6402                 close $fd;
6403
6404                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6405                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6406                         die_error(404, "File or directory for given base does not exist");
6407                 }
6408                 $type = $2;
6409                 $hash = $3;
6410         } else {
6411                 die_error(400, "Not enough information to find object");
6412         }
6413
6414         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6415                                           hash=>$hash, hash_base=>$hash_base,
6416                                           file_name=>$file_name),
6417                              -status => '302 Found');
6418 }
6419
6420 sub git_blobdiff {
6421         my $format = shift || 'html';
6422
6423         my $fd;
6424         my @difftree;
6425         my %diffinfo;
6426         my $expires;
6427
6428         # preparing $fd and %diffinfo for git_patchset_body
6429         # new style URI
6430         if (defined $hash_base && defined $hash_parent_base) {
6431                 if (defined $file_name) {
6432                         # read raw output
6433                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6434                                 $hash_parent_base, $hash_base,
6435                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6436                                 or die_error(500, "Open git-diff-tree failed");
6437                         @difftree = map { chomp; $_ } <$fd>;
6438                         close $fd
6439                                 or die_error(404, "Reading git-diff-tree failed");
6440                         @difftree
6441                                 or die_error(404, "Blob diff not found");
6442
6443                 } elsif (defined $hash &&
6444                          $hash =~ /[0-9a-fA-F]{40}/) {
6445                         # try to find filename from $hash
6446
6447                         # read filtered raw output
6448                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6449                                 $hash_parent_base, $hash_base, "--"
6450                                 or die_error(500, "Open git-diff-tree failed");
6451                         @difftree =
6452                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6453                                 # $hash == to_id
6454                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6455                                 map { chomp; $_ } <$fd>;
6456                         close $fd
6457                                 or die_error(404, "Reading git-diff-tree failed");
6458                         @difftree
6459                                 or die_error(404, "Blob diff not found");
6460
6461                 } else {
6462                         die_error(400, "Missing one of the blob diff parameters");
6463                 }
6464
6465                 if (@difftree > 1) {
6466                         die_error(400, "Ambiguous blob diff specification");
6467                 }
6468
6469                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6470                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6471                 $file_name   ||= $diffinfo{'to_file'};
6472
6473                 $hash_parent ||= $diffinfo{'from_id'};
6474                 $hash        ||= $diffinfo{'to_id'};
6475
6476                 # non-textual hash id's can be cached
6477                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6478                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6479                         $expires = '+1d';
6480                 }
6481
6482                 # open patch output
6483                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6484                         '-p', ($format eq 'html' ? "--full-index" : ()),
6485                         $hash_parent_base, $hash_base,
6486                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6487                         or die_error(500, "Open git-diff-tree failed");
6488         }
6489
6490         # old/legacy style URI -- not generated anymore since 1.4.3.
6491         if (!%diffinfo) {
6492                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6493         }
6494
6495         # header
6496         if ($format eq 'html') {
6497                 my $formats_nav =
6498                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6499                                 "raw");
6500                 git_header_html(undef, $expires);
6501                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6502                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6503                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6504                 } else {
6505                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6506                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
6507                 }
6508                 if (defined $file_name) {
6509                         git_print_page_path($file_name, "blob", $hash_base);
6510                 } else {
6511                         print "<div class=\"page_path\"></div>\n";
6512                 }
6513
6514         } elsif ($format eq 'plain') {
6515                 print $cgi->header(
6516                         -type => 'text/plain',
6517                         -charset => 'utf-8',
6518                         -expires => $expires,
6519                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6520
6521                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6522
6523         } else {
6524                 die_error(400, "Unknown blobdiff format");
6525         }
6526
6527         # patch
6528         if ($format eq 'html') {
6529                 print "<div class=\"page_body\">\n";
6530
6531                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6532                 close $fd;
6533
6534                 print "</div>\n"; # class="page_body"
6535                 git_footer_html();
6536
6537         } else {
6538                 while (my $line = <$fd>) {
6539                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6540                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6541
6542                         print $line;
6543
6544                         last if $line =~ m!^\+\+\+!;
6545                 }
6546                 local $/ = undef;
6547                 print <$fd>;
6548                 close $fd;
6549         }
6550 }
6551
6552 sub git_blobdiff_plain {
6553         git_blobdiff('plain');
6554 }
6555
6556 sub git_commitdiff {
6557         my %params = @_;
6558         my $format = $params{-format} || 'html';
6559
6560         my ($patch_max) = gitweb_get_feature('patches');
6561         if ($format eq 'patch') {
6562                 die_error(403, "Patch view not allowed") unless $patch_max;
6563         }
6564
6565         $hash ||= $hash_base || "HEAD";
6566         my %co = parse_commit($hash)
6567             or die_error(404, "Unknown commit object");
6568
6569         # choose format for commitdiff for merge
6570         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6571                 $hash_parent = '--cc';
6572         }
6573         # we need to prepare $formats_nav before almost any parameter munging
6574         my $formats_nav;
6575         if ($format eq 'html') {
6576                 $formats_nav =
6577                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6578                                 "raw");
6579                 if ($patch_max && @{$co{'parents'}} <= 1) {
6580                         $formats_nav .= " | " .
6581                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6582                                         "patch");
6583                 }
6584
6585                 if (defined $hash_parent &&
6586                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6587                         # commitdiff with two commits given
6588                         my $hash_parent_short = $hash_parent;
6589                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6590                                 $hash_parent_short = substr($hash_parent, 0, 7);
6591                         }
6592                         $formats_nav .=
6593                                 ' (from';
6594                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6595                                 if ($co{'parents'}[$i] eq $hash_parent) {
6596                                         $formats_nav .= ' parent ' . ($i+1);
6597                                         last;
6598                                 }
6599                         }
6600                         $formats_nav .= ': ' .
6601                                 $cgi->a({-href => href(action=>"commitdiff",
6602                                                        hash=>$hash_parent)},
6603                                         esc_html($hash_parent_short)) .
6604                                 ')';
6605                 } elsif (!$co{'parent'}) {
6606                         # --root commitdiff
6607                         $formats_nav .= ' (initial)';
6608                 } elsif (scalar @{$co{'parents'}} == 1) {
6609                         # single parent commit
6610                         $formats_nav .=
6611                                 ' (parent: ' .
6612                                 $cgi->a({-href => href(action=>"commitdiff",
6613                                                        hash=>$co{'parent'})},
6614                                         esc_html(substr($co{'parent'}, 0, 7))) .
6615                                 ')';
6616                 } else {
6617                         # merge commit
6618                         if ($hash_parent eq '--cc') {
6619                                 $formats_nav .= ' | ' .
6620                                         $cgi->a({-href => href(action=>"commitdiff",
6621                                                                hash=>$hash, hash_parent=>'-c')},
6622                                                 'combined');
6623                         } else { # $hash_parent eq '-c'
6624                                 $formats_nav .= ' | ' .
6625                                         $cgi->a({-href => href(action=>"commitdiff",
6626                                                                hash=>$hash, hash_parent=>'--cc')},
6627                                                 'compact');
6628                         }
6629                         $formats_nav .=
6630                                 ' (merge: ' .
6631                                 join(' ', map {
6632                                         $cgi->a({-href => href(action=>"commitdiff",
6633                                                                hash=>$_)},
6634                                                 esc_html(substr($_, 0, 7)));
6635                                 } @{$co{'parents'}} ) .
6636                                 ')';
6637                 }
6638         }
6639
6640         my $hash_parent_param = $hash_parent;
6641         if (!defined $hash_parent_param) {
6642                 # --cc for multiple parents, --root for parentless
6643                 $hash_parent_param =
6644                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6645         }
6646
6647         # read commitdiff
6648         my $fd;
6649         my @difftree;
6650         if ($format eq 'html') {
6651                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6652                         "--no-commit-id", "--patch-with-raw", "--full-index",
6653                         $hash_parent_param, $hash, "--"
6654                         or die_error(500, "Open git-diff-tree failed");
6655
6656                 while (my $line = <$fd>) {
6657                         chomp $line;
6658                         # empty line ends raw part of diff-tree output
6659                         last unless $line;
6660                         push @difftree, scalar parse_difftree_raw_line($line);
6661                 }
6662
6663         } elsif ($format eq 'plain') {
6664                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6665                         '-p', $hash_parent_param, $hash, "--"
6666                         or die_error(500, "Open git-diff-tree failed");
6667         } elsif ($format eq 'patch') {
6668                 # For commit ranges, we limit the output to the number of
6669                 # patches specified in the 'patches' feature.
6670                 # For single commits, we limit the output to a single patch,
6671                 # diverging from the git-format-patch default.
6672                 my @commit_spec = ();
6673                 if ($hash_parent) {
6674                         if ($patch_max > 0) {
6675                                 push @commit_spec, "-$patch_max";
6676                         }
6677                         push @commit_spec, '-n', "$hash_parent..$hash";
6678                 } else {
6679                         if ($params{-single}) {
6680                                 push @commit_spec, '-1';
6681                         } else {
6682                                 if ($patch_max > 0) {
6683                                         push @commit_spec, "-$patch_max";
6684                                 }
6685                                 push @commit_spec, "-n";
6686                         }
6687                         push @commit_spec, '--root', $hash;
6688                 }
6689                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6690                         '--encoding=utf8', '--stdout', @commit_spec
6691                         or die_error(500, "Open git-format-patch failed");
6692         } else {
6693                 die_error(400, "Unknown commitdiff format");
6694         }
6695
6696         # non-textual hash id's can be cached
6697         my $expires;
6698         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6699                 $expires = "+1d";
6700         }
6701
6702         # write commit message
6703         if ($format eq 'html') {
6704                 my $refs = git_get_references();
6705                 my $ref = format_ref_marker($refs, $co{'id'});
6706
6707                 git_header_html(undef, $expires);
6708                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6709                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6710                 print "<div class=\"title_text\">\n" .
6711                       "<table class=\"object_header\">\n";
6712                 git_print_authorship_rows(\%co);
6713                 print "</table>".
6714                       "</div>\n";
6715                 print "<div class=\"page_body\">\n";
6716                 if (@{$co{'comment'}} > 1) {
6717                         print "<div class=\"log\">\n";
6718                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6719                         print "</div>\n"; # class="log"
6720                 }
6721
6722         } elsif ($format eq 'plain') {
6723                 my $refs = git_get_references("tags");
6724                 my $tagname = git_get_rev_name_tags($hash);
6725                 my $filename = basename($project) . "-$hash.patch";
6726
6727                 print $cgi->header(
6728                         -type => 'text/plain',
6729                         -charset => 'utf-8',
6730                         -expires => $expires,
6731                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6732                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6733                 print "From: " . to_utf8($co{'author'}) . "\n";
6734                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6735                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6736
6737                 print "X-Git-Tag: $tagname\n" if $tagname;
6738                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6739
6740                 foreach my $line (@{$co{'comment'}}) {
6741                         print to_utf8($line) . "\n";
6742                 }
6743                 print "---\n\n";
6744         } elsif ($format eq 'patch') {
6745                 my $filename = basename($project) . "-$hash.patch";
6746
6747                 print $cgi->header(
6748                         -type => 'text/plain',
6749                         -charset => 'utf-8',
6750                         -expires => $expires,
6751                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6752         }
6753
6754         # write patch
6755         if ($format eq 'html') {
6756                 my $use_parents = !defined $hash_parent ||
6757                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6758                 git_difftree_body(\@difftree, $hash,
6759                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6760                 print "<br/>\n";
6761
6762                 git_patchset_body($fd, \@difftree, $hash,
6763                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6764                 close $fd;
6765                 print "</div>\n"; # class="page_body"
6766                 git_footer_html();
6767
6768         } elsif ($format eq 'plain') {
6769                 local $/ = undef;
6770                 print <$fd>;
6771                 close $fd
6772                         or print "Reading git-diff-tree failed\n";
6773         } elsif ($format eq 'patch') {
6774                 local $/ = undef;
6775                 print <$fd>;
6776                 close $fd
6777                         or print "Reading git-format-patch failed\n";
6778         }
6779 }
6780
6781 sub git_commitdiff_plain {
6782         git_commitdiff(-format => 'plain');
6783 }
6784
6785 # format-patch-style patches
6786 sub git_patch {
6787         git_commitdiff(-format => 'patch', -single => 1);
6788 }
6789
6790 sub git_patches {
6791         git_commitdiff(-format => 'patch');
6792 }
6793
6794 sub git_history {
6795         git_log_generic('history', \&git_history_body,
6796                         $hash_base, $hash_parent_base,
6797                         $file_name, $hash);
6798 }
6799
6800 sub git_search {
6801         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6802         if (!defined $searchtext) {
6803                 die_error(400, "Text field is empty");
6804         }
6805         if (!defined $hash) {
6806                 $hash = git_get_head_hash($project);
6807         }
6808         my %co = parse_commit($hash);
6809         if (!%co) {
6810                 die_error(404, "Unknown commit object");
6811         }
6812         if (!defined $page) {
6813                 $page = 0;
6814         }
6815
6816         $searchtype ||= 'commit';
6817         if ($searchtype eq 'pickaxe') {
6818                 # pickaxe may take all resources of your box and run for several minutes
6819                 # with every query - so decide by yourself how public you make this feature
6820                 gitweb_check_feature('pickaxe')
6821                     or die_error(403, "Pickaxe is disabled");
6822         }
6823         if ($searchtype eq 'grep') {
6824                 gitweb_check_feature('grep')
6825                     or die_error(403, "Grep is disabled");
6826         }
6827
6828         git_header_html();
6829
6830         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6831                 my $greptype;
6832                 if ($searchtype eq 'commit') {
6833                         $greptype = "--grep=";
6834                 } elsif ($searchtype eq 'author') {
6835                         $greptype = "--author=";
6836                 } elsif ($searchtype eq 'committer') {
6837                         $greptype = "--committer=";
6838                 }
6839                 $greptype .= $searchtext;
6840                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6841                                                $greptype, '--regexp-ignore-case',
6842                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6843
6844                 my $paging_nav = '';
6845                 if ($page > 0) {
6846                         $paging_nav .=
6847                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6848                                                        searchtext=>$searchtext,
6849                                                        searchtype=>$searchtype)},
6850                                         "first");
6851                         $paging_nav .= " &sdot; " .
6852                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6853                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6854                 } else {
6855                         $paging_nav .= "first";
6856                         $paging_nav .= " &sdot; prev";
6857                 }
6858                 my $next_link = '';
6859                 if ($#commitlist >= 100) {
6860                         $next_link =
6861                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6862                                          -accesskey => "n", -title => "Alt-n"}, "next");
6863                         $paging_nav .= " &sdot; $next_link";
6864                 } else {
6865                         $paging_nav .= " &sdot; next";
6866                 }
6867
6868                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6869                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6870                 if ($page == 0 && !@commitlist) {
6871                         print "<p>No match.</p>\n";
6872                 } else {
6873                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6874                 }
6875         }
6876
6877         if ($searchtype eq 'pickaxe') {
6878                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6879                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6880
6881                 print "<table class=\"pickaxe search\">\n";
6882                 my $alternate = 1;
6883                 local $/ = "\n";
6884                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6885                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6886                         ($search_use_regexp ? '--pickaxe-regex' : ());
6887                 undef %co;
6888                 my @files;
6889                 while (my $line = <$fd>) {
6890                         chomp $line;
6891                         next unless $line;
6892
6893                         my %set = parse_difftree_raw_line($line);
6894                         if (defined $set{'commit'}) {
6895                                 # finish previous commit
6896                                 if (%co) {
6897                                         print "</td>\n" .
6898                                               "<td class=\"link\">" .
6899                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6900                                               " | " .
6901                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6902                                         print "</td>\n" .
6903                                               "</tr>\n";
6904                                 }
6905
6906                                 if ($alternate) {
6907                                         print "<tr class=\"dark\">\n";
6908                                 } else {
6909                                         print "<tr class=\"light\">\n";
6910                                 }
6911                                 $alternate ^= 1;
6912                                 %co = parse_commit($set{'commit'});
6913                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6914                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6915                                       "<td><i>$author</i></td>\n" .
6916                                       "<td>" .
6917                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6918                                               -class => "list subject"},
6919                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6920                         } elsif (defined $set{'to_id'}) {
6921                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6922
6923                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6924                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6925                                               -class => "list"},
6926                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6927                                       "<br/>\n";
6928                         }
6929                 }
6930                 close $fd;
6931
6932                 # finish last commit (warning: repetition!)
6933                 if (%co) {
6934                         print "</td>\n" .
6935                               "<td class=\"link\">" .
6936                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6937                               " | " .
6938                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6939                         print "</td>\n" .
6940                               "</tr>\n";
6941                 }
6942
6943                 print "</table>\n";
6944         }
6945
6946         if ($searchtype eq 'grep') {
6947                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6948                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6949
6950                 print "<table class=\"grep_search\">\n";
6951                 my $alternate = 1;
6952                 my $matches = 0;
6953                 local $/ = "\n";
6954                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6955                         $search_use_regexp ? ('-E', '-i') : '-F',
6956                         $searchtext, $co{'tree'};
6957                 my $lastfile = '';
6958                 while (my $line = <$fd>) {
6959                         chomp $line;
6960                         my ($file, $lno, $ltext, $binary);
6961                         last if ($matches++ > 1000);
6962                         if ($line =~ /^Binary file (.+) matches$/) {
6963                                 $file = $1;
6964                                 $binary = 1;
6965                         } else {
6966                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6967                         }
6968                         if ($file ne $lastfile) {
6969                                 $lastfile and print "</td></tr>\n";
6970                                 if ($alternate++) {
6971                                         print "<tr class=\"dark\">\n";
6972                                 } else {
6973                                         print "<tr class=\"light\">\n";
6974                                 }
6975                                 print "<td class=\"list\">".
6976                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6977                                                                file_name=>"$file"),
6978                                                 -class => "list"}, esc_path($file));
6979                                 print "</td><td>\n";
6980                                 $lastfile = $file;
6981                         }
6982                         if ($binary) {
6983                                 print "<div class=\"binary\">Binary file</div>\n";
6984                         } else {
6985                                 $ltext = untabify($ltext);
6986                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6987                                         $ltext = esc_html($1, -nbsp=>1);
6988                                         $ltext .= '<span class="match">';
6989                                         $ltext .= esc_html($2, -nbsp=>1);
6990                                         $ltext .= '</span>';
6991                                         $ltext .= esc_html($3, -nbsp=>1);
6992                                 } else {
6993                                         $ltext = esc_html($ltext, -nbsp=>1);
6994                                 }
6995                                 print "<div class=\"pre\">" .
6996                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6997                                                                file_name=>"$file").'#l'.$lno,
6998                                                 -class => "linenr"}, sprintf('%4i', $lno))
6999                                         . ' ' .  $ltext . "</div>\n";
7000                         }
7001                 }
7002                 if ($lastfile) {
7003                         print "</td></tr>\n";
7004                         if ($matches > 1000) {
7005                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
7006                         }
7007                 } else {
7008                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
7009                 }
7010                 close $fd;
7011
7012                 print "</table>\n";
7013         }
7014         git_footer_html();
7015 }
7016
7017 sub git_search_help {
7018         git_header_html();
7019         git_print_page_nav('','', $hash,$hash,$hash);
7020         print <<EOT;
7021 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
7022 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
7023 the pattern entered is recognized as the POSIX extended
7024 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
7025 insensitive).</p>
7026 <dl>
7027 <dt><b>commit</b></dt>
7028 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
7029 EOT
7030         my $have_grep = gitweb_check_feature('grep');
7031         if ($have_grep) {
7032                 print <<EOT;
7033 <dt><b>grep</b></dt>
7034 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
7035     a different one) are searched for the given pattern. On large trees, this search can take
7036 a while and put some strain on the server, so please use it with some consideration. Note that
7037 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
7038 case-sensitive.</dd>
7039 EOT
7040         }
7041         print <<EOT;
7042 <dt><b>author</b></dt>
7043 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
7044 <dt><b>committer</b></dt>
7045 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
7046 EOT
7047         my $have_pickaxe = gitweb_check_feature('pickaxe');
7048         if ($have_pickaxe) {
7049                 print <<EOT;
7050 <dt><b>pickaxe</b></dt>
7051 <dd>All commits that caused the string to appear or disappear from any file (changes that
7052 added, removed or "modified" the string) will be listed. This search can take a while and
7053 takes a lot of strain on the server, so please use it wisely. Note that since you may be
7054 interested even in changes just changing the case as well, this search is case sensitive.</dd>
7055 EOT
7056         }
7057         print "</dl>\n";
7058         git_footer_html();
7059 }
7060
7061 sub git_shortlog {
7062         git_log_generic('shortlog', \&git_shortlog_body,
7063                         $hash, $hash_parent);
7064 }
7065
7066 ## ......................................................................
7067 ## feeds (RSS, Atom; OPML)
7068
7069 sub git_feed {
7070         my $format = shift || 'atom';
7071         my $have_blame = gitweb_check_feature('blame');
7072
7073         # Atom: http://www.atomenabled.org/developers/syndication/
7074         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
7075         if ($format ne 'rss' && $format ne 'atom') {
7076                 die_error(400, "Unknown web feed format");
7077         }
7078
7079         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
7080         my $head = $hash || 'HEAD';
7081         my @commitlist = parse_commits($head, 150, 0, $file_name);
7082
7083         my %latest_commit;
7084         my %latest_date;
7085         my $content_type = "application/$format+xml";
7086         if (defined $cgi->http('HTTP_ACCEPT') &&
7087                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
7088                 # browser (feed reader) prefers text/xml
7089                 $content_type = 'text/xml';
7090         }
7091         if (defined($commitlist[0])) {
7092                 %latest_commit = %{$commitlist[0]};
7093                 my $latest_epoch = $latest_commit{'committer_epoch'};
7094                 %latest_date   = parse_date($latest_epoch);
7095                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7096                 if (defined $if_modified) {
7097                         my $since;
7098                         if (eval { require HTTP::Date; 1; }) {
7099                                 $since = HTTP::Date::str2time($if_modified);
7100                         } elsif (eval { require Time::ParseDate; 1; }) {
7101                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7102                         }
7103                         if (defined $since && $latest_epoch <= $since) {
7104                                 print $cgi->header(
7105                                         -type => $content_type,
7106                                         -charset => 'utf-8',
7107                                         -last_modified => $latest_date{'rfc2822'},
7108                                         -status => '304 Not Modified');
7109                                 return;
7110                         }
7111                 }
7112                 print $cgi->header(
7113                         -type => $content_type,
7114                         -charset => 'utf-8',
7115                         -last_modified => $latest_date{'rfc2822'});
7116         } else {
7117                 print $cgi->header(
7118                         -type => $content_type,
7119                         -charset => 'utf-8');
7120         }
7121
7122         # Optimization: skip generating the body if client asks only
7123         # for Last-Modified date.
7124         return if ($cgi->request_method() eq 'HEAD');
7125
7126         # header variables
7127         my $title = "$site_name - $project/$action";
7128         my $feed_type = 'log';
7129         if (defined $hash) {
7130                 $title .= " - '$hash'";
7131                 $feed_type = 'branch log';
7132                 if (defined $file_name) {
7133                         $title .= " :: $file_name";
7134                         $feed_type = 'history';
7135                 }
7136         } elsif (defined $file_name) {
7137                 $title .= " - $file_name";
7138                 $feed_type = 'history';
7139         }
7140         $title .= " $feed_type";
7141         my $descr = git_get_project_description($project);
7142         if (defined $descr) {
7143                 $descr = esc_html($descr);
7144         } else {
7145                 $descr = "$project " .
7146                          ($format eq 'rss' ? 'RSS' : 'Atom') .
7147                          " feed";
7148         }
7149         my $owner = git_get_project_owner($project);
7150         $owner = esc_html($owner);
7151
7152         #header
7153         my $alt_url;
7154         if (defined $file_name) {
7155                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
7156         } elsif (defined $hash) {
7157                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
7158         } else {
7159                 $alt_url = href(-full=>1, action=>"summary");
7160         }
7161         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
7162         if ($format eq 'rss') {
7163                 print <<XML;
7164 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
7165 <channel>
7166 XML
7167                 print "<title>$title</title>\n" .
7168                       "<link>$alt_url</link>\n" .
7169                       "<description>$descr</description>\n" .
7170                       "<language>en</language>\n" .
7171                       # project owner is responsible for 'editorial' content
7172                       "<managingEditor>$owner</managingEditor>\n";
7173                 if (defined $logo || defined $favicon) {
7174                         # prefer the logo to the favicon, since RSS
7175                         # doesn't allow both
7176                         my $img = esc_url($logo || $favicon);
7177                         print "<image>\n" .
7178                               "<url>$img</url>\n" .
7179                               "<title>$title</title>\n" .
7180                               "<link>$alt_url</link>\n" .
7181                               "</image>\n";
7182                 }
7183                 if (%latest_date) {
7184                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
7185                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
7186                 }
7187                 print "<generator>gitweb v.$version/$git_version</generator>\n";
7188         } elsif ($format eq 'atom') {
7189                 print <<XML;
7190 <feed xmlns="http://www.w3.org/2005/Atom">
7191 XML
7192                 print "<title>$title</title>\n" .
7193                       "<subtitle>$descr</subtitle>\n" .
7194                       '<link rel="alternate" type="text/html" href="' .
7195                       $alt_url . '" />' . "\n" .
7196                       '<link rel="self" type="' . $content_type . '" href="' .
7197                       $cgi->self_url() . '" />' . "\n" .
7198                       "<id>" . href(-full=>1) . "</id>\n" .
7199                       # use project owner for feed author
7200                       "<author><name>$owner</name></author>\n";
7201                 if (defined $favicon) {
7202                         print "<icon>" . esc_url($favicon) . "</icon>\n";
7203                 }
7204                 if (defined $logo_url) {
7205                         # not twice as wide as tall: 72 x 27 pixels
7206                         print "<logo>" . esc_url($logo) . "</logo>\n";
7207                 }
7208                 if (! %latest_date) {
7209                         # dummy date to keep the feed valid until commits trickle in:
7210                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
7211                 } else {
7212                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
7213                 }
7214                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
7215         }
7216
7217         # contents
7218         for (my $i = 0; $i <= $#commitlist; $i++) {
7219                 my %co = %{$commitlist[$i]};
7220                 my $commit = $co{'id'};
7221                 # we read 150, we always show 30 and the ones more recent than 48 hours
7222                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
7223                         last;
7224                 }
7225                 my %cd = parse_date($co{'author_epoch'});
7226
7227                 # get list of changed files
7228                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7229                         $co{'parent'} || "--root",
7230                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
7231                         or next;
7232                 my @difftree = map { chomp; $_ } <$fd>;
7233                 close $fd
7234                         or next;
7235
7236                 # print element (entry, item)
7237                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
7238                 if ($format eq 'rss') {
7239                         print "<item>\n" .
7240                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
7241                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
7242                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
7243                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
7244                               "<link>$co_url</link>\n" .
7245                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
7246                               "<content:encoded>" .
7247                               "<![CDATA[\n";
7248                 } elsif ($format eq 'atom') {
7249                         print "<entry>\n" .
7250                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
7251                               "<updated>$cd{'iso-8601'}</updated>\n" .
7252                               "<author>\n" .
7253                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
7254                         if ($co{'author_email'}) {
7255                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
7256                         }
7257                         print "</author>\n" .
7258                               # use committer for contributor
7259                               "<contributor>\n" .
7260                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
7261                         if ($co{'committer_email'}) {
7262                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
7263                         }
7264                         print "</contributor>\n" .
7265                               "<published>$cd{'iso-8601'}</published>\n" .
7266                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
7267                               "<id>$co_url</id>\n" .
7268                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
7269                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
7270                 }
7271                 my $comment = $co{'comment'};
7272                 print "<pre>\n";
7273                 foreach my $line (@$comment) {
7274                         $line = esc_html($line);
7275                         print "$line\n";
7276                 }
7277                 print "</pre><ul>\n";
7278                 foreach my $difftree_line (@difftree) {
7279                         my %difftree = parse_difftree_raw_line($difftree_line);
7280                         next if !$difftree{'from_id'};
7281
7282                         my $file = $difftree{'file'} || $difftree{'to_file'};
7283
7284                         print "<li>" .
7285                               "[" .
7286                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
7287                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
7288                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
7289                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
7290                                       -title => "diff"}, 'D');
7291                         if ($have_blame) {
7292                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
7293                                                              file_name=>$file, hash_base=>$commit),
7294                                               -title => "blame"}, 'B');
7295                         }
7296                         # if this is not a feed of a file history
7297                         if (!defined $file_name || $file_name ne $file) {
7298                                 print $cgi->a({-href => href(-full=>1, action=>"history",
7299                                                              file_name=>$file, hash=>$commit),
7300                                               -title => "history"}, 'H');
7301                         }
7302                         $file = esc_path($file);
7303                         print "] ".
7304                               "$file</li>\n";
7305                 }
7306                 if ($format eq 'rss') {
7307                         print "</ul>]]>\n" .
7308                               "</content:encoded>\n" .
7309                               "</item>\n";
7310                 } elsif ($format eq 'atom') {
7311                         print "</ul>\n</div>\n" .
7312                               "</content>\n" .
7313                               "</entry>\n";
7314                 }
7315         }
7316
7317         # end of feed
7318         if ($format eq 'rss') {
7319                 print "</channel>\n</rss>\n";
7320         } elsif ($format eq 'atom') {
7321                 print "</feed>\n";
7322         }
7323 }
7324
7325 sub git_rss {
7326         git_feed('rss');
7327 }
7328
7329 sub git_atom {
7330         git_feed('atom');
7331 }
7332
7333 sub git_opml {
7334         my @list = git_get_projects_list();
7335
7336         print $cgi->header(
7337                 -type => 'text/xml',
7338                 -charset => 'utf-8',
7339                 -content_disposition => 'inline; filename="opml.xml"');
7340
7341         print <<XML;
7342 <?xml version="1.0" encoding="utf-8"?>
7343 <opml version="1.0">
7344 <head>
7345   <title>$site_name OPML Export</title>
7346 </head>
7347 <body>
7348 <outline text="git RSS feeds">
7349 XML
7350
7351         foreach my $pr (@list) {
7352                 my %proj = %$pr;
7353                 my $head = git_get_head_hash($proj{'path'});
7354                 if (!defined $head) {
7355                         next;
7356                 }
7357                 $git_dir = "$projectroot/$proj{'path'}";
7358                 my %co = parse_commit($head);
7359                 if (!%co) {
7360                         next;
7361                 }
7362
7363                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7364                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7365                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7366                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7367         }
7368         print <<XML;
7369 </outline>
7370 </body>
7371 </opml>
7372 XML
7373 }