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