[PATCH GSoC 1/3] gitweb: Create Gitweb::Config module

[Pavan Kumar Sunkara <pavan.sss1991@gmail.com>]

Create Gitweb::Config module in 'gitweb/lib/Gitweb/Config.pm'
to store all the configuration variables of the gitweb.perl
script.

Subroutines moved:
	evaluate_gitweb_config
	evaluate_git_version

Subroutines yet to move: (Contains calls to not yet packaged subs)
	gitweb_get_feature
	gitweb_check_feature

Update gitweb/Makefile to install gitweb modules alongside gitweb

Signed-off-by: Pavan Kumar Sunkara <pavan.sss1991@gmail.com>
---

This patch is based on branch 'pu' of alt-git.git

 gitweb/Makefile             |    6 +
 gitweb/gitweb.perl          |  421 +++----------------------------------------
 gitweb/lib/Gitweb/Config.pm |  413 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 447 insertions(+), 393 deletions(-)
 create mode 100644 gitweb/lib/Gitweb/Config.pm

diff --git a/gitweb/Makefile b/gitweb/Makefile
index d2584fe..45e176e 100644
--- a/gitweb/Makefile
+++ b/gitweb/Makefile
@@ -55,6 +55,7 @@ PERL_PATH  ?= /usr/bin/perl
 bindir_SQ = $(subst ','\'',$(bindir))#'
 gitwebdir_SQ = $(subst ','\'',$(gitwebdir))#'
 gitwebstaticdir_SQ = $(subst ','\'',$(gitwebdir)/static)#'
+gitweblibdir_SQ = $(subst ','\'',$(gitwebdir)/lib)#'
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))#'
 PERL_PATH_SQ  = $(subst ','\'',$(PERL_PATH))#'
 DESTDIR_SQ    = $(subst ','\'',$(DESTDIR))#'
@@ -110,6 +111,9 @@ endif
 
 GITWEB_FILES += static/git-logo.png static/git-favicon.png
 
+# Files: gitweb/lib/Gitweb
+GITWEB_LIB_GITWEB += lib/Gitweb/Config.pm
+
 GITWEB_REPLACE = \
 	-e 's|++GIT_VERSION++|$(GIT_VERSION)|g' \
 	-e 's|++GIT_BINDIR++|$(bindir)|g' \
@@ -150,6 +154,8 @@ install: all
 	$(INSTALL) -m 755 $(GITWEB_PROGRAMS) '$(DESTDIR_SQ)$(gitwebdir_SQ)'
 	$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(gitwebstaticdir_SQ)'
 	$(INSTALL) -m 644 $(GITWEB_FILES) '$(DESTDIR_SQ)$(gitwebstaticdir_SQ)'
+	$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(gitweblibdir_SQ)/Gitweb'
+	$(INSTALL) -m 644 $(GITWEB_LIB_GITWEB) '$(DESTDIR_SQ)$(gitweblibdir_SQ)/Gitweb'
 
 ### Cleaning rules
 
diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 673e7a3..ef71656 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -16,19 +16,22 @@ use Encode;
 use Fcntl ':mode';
 use File::Find qw();
 use File::Basename qw(basename);
+use File::Spec;
 binmode STDOUT, ':utf8';
 
-our $t0;
-if (eval { require Time::HiRes; 1; }) {
-	$t0 = [Time::HiRes::gettimeofday()];
+# __DIR__ is taken from Dir::Self __DIR__ fragment
+sub __DIR__ () {
+	File::Spec->rel2abs(join '', (File::Spec->splitpath(__FILE__))[0, 1]);
 }
-our $number_of_git_cmds = 0;
+use lib __DIR__ . "/lib";
+
+use Gitweb::Config;
 
 BEGIN {
 	CGI->compile() if $ENV{'MOD_PERL'};
 }
 
-our $version = "++GIT_VERSION++";
+$version = "++GIT_VERSION++";
 
 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
 sub evaluate_uri {
@@ -68,402 +71,58 @@ sub evaluate_uri {
 
 # core git executable to use
 # this can just be "git" if your webserver has a sensible PATH
-our $GIT = "++GIT_BINDIR++/git";
+$GIT = "++GIT_BINDIR++/git";
 
 # absolute fs-path which will be prepended to the project path
 #our $projectroot = "/pub/scm";
-our $projectroot = "++GITWEB_PROJECTROOT++";
+$projectroot = "++GITWEB_PROJECTROOT++";
 
 # fs traversing limit for getting project list
 # the number is relative to the projectroot
-our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
+$project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
 
 # string of the home link on top of all pages
-our $home_link_str = "++GITWEB_HOME_LINK_STR++";
+$home_link_str = "++GITWEB_HOME_LINK_STR++";
 
 # name of your site or organization to appear in page titles
 # replace this with something more descriptive for clearer bookmarks
-our $site_name = "++GITWEB_SITENAME++"
+$site_name = "++GITWEB_SITENAME++"
                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
 
 # filename of html text to include at top of each page
-our $site_header = "++GITWEB_SITE_HEADER++";
+$site_header = "++GITWEB_SITE_HEADER++";
 # html text to include at home page
-our $home_text = "++GITWEB_HOMETEXT++";
+$home_text = "++GITWEB_HOMETEXT++";
 # filename of html text to include at bottom of each page
-our $site_footer = "++GITWEB_SITE_FOOTER++";
+$site_footer = "++GITWEB_SITE_FOOTER++";
 
 # URI of stylesheets
-our @stylesheets = ("++GITWEB_CSS++");
+@stylesheets = ("++GITWEB_CSS++");
 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
-our $stylesheet = undef;
+$stylesheet = undef;
 # URI of GIT logo (72x27 size)
-our $logo = "++GITWEB_LOGO++";
+$logo = "++GITWEB_LOGO++";
 # URI of GIT favicon, assumed to be image/png type
-our $favicon = "++GITWEB_FAVICON++";
+$favicon = "++GITWEB_FAVICON++";
 # URI of gitweb.js (JavaScript code for gitweb)
-our $javascript = "++GITWEB_JS++";
-
-# URI and label (title) of GIT logo link
-#our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
-#our $logo_label = "git documentation";
-our $logo_url = "http://git-scm.com/";
-our $logo_label = "git homepage";
+$javascript = "++GITWEB_JS++";
 
 # source of projects list
-our $projects_list = "++GITWEB_LIST++";
-
-# the width (in characters) of the projects list "Description" column
-our $projects_list_description_width = 25;
-
-# default order of projects list
-# valid values are none, project, descr, owner, and age
-our $default_projects_order = "project";
+$projects_list = "++GITWEB_LIST++";
 
 # show repository only if this file exists
 # (only effective if this variable evaluates to true)
-our $export_ok = "++GITWEB_EXPORT_OK++";
-
-# show repository only if this subroutine returns true
-# when given the path to the project, for example:
-#    sub { return -e "$_[0]/git-daemon-export-ok"; }
-our $export_auth_hook = undef;
+$export_ok = "++GITWEB_EXPORT_OK++";
 
 # only allow viewing of repositories also shown on the overview page
-our $strict_export = "++GITWEB_STRICT_EXPORT++";
+$strict_export = "++GITWEB_STRICT_EXPORT++";
 
 # list of git base URLs used for URL to where fetch project from,
 # i.e. full URL is "$git_base_url/$project"
-our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
-
-# default blob_plain mimetype and default charset for text/plain blob
-our $default_blob_plain_mimetype = 'text/plain';
-our $default_text_plain_charset  = undef;
-
-# file to use for guessing MIME types before trying /etc/mime.types
-# (relative to the current git repository)
-our $mimetypes_file = undef;
-
-# assume this charset if line contains non-UTF-8 characters;
-# it should be valid encoding (see Encoding::Supported(3pm) for list),
-# for which encoding all byte sequences are valid, for example
-# 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
-# could be even 'utf-8' for the old behavior)
-our $fallback_encoding = 'latin1';
-
-# rename detection options for git-diff and git-diff-tree
-# - default is '-M', with the cost proportional to
-#   (number of removed files) * (number of new files).
-# - more costly is '-C' (which implies '-M'), with the cost proportional to
-#   (number of changed files + number of removed files) * (number of new files)
-# - even more costly is '-C', '--find-copies-harder' with cost
-#   (number of files in the original tree) * (number of new files)
-# - one might want to include '-B' option, e.g. '-B', '-M'
-our @diff_opts = ('-M'); # taken from git_commit
-
-# Disables features that would allow repository owners to inject script into
-# the gitweb domain.
-our $prevent_xss = 0;
-
-# information about snapshot formats that gitweb is capable of serving
-our %known_snapshot_formats = (
-	# name => {
-	# 	'display' => display name,
-	# 	'type' => mime type,
-	# 	'suffix' => filename suffix,
-	# 	'format' => --format for git-archive,
-	# 	'compressor' => [compressor command and arguments]
-	# 	                (array reference, optional)
-	# 	'disabled' => boolean (optional)}
-	#
-	'tgz' => {
-		'display' => 'tar.gz',
-		'type' => 'application/x-gzip',
-		'suffix' => '.tar.gz',
-		'format' => 'tar',
-		'compressor' => ['gzip']},
-
-	'tbz2' => {
-		'display' => 'tar.bz2',
-		'type' => 'application/x-bzip2',
-		'suffix' => '.tar.bz2',
-		'format' => 'tar',
-		'compressor' => ['bzip2']},
-
-	'txz' => {
-		'display' => 'tar.xz',
-		'type' => 'application/x-xz',
-		'suffix' => '.tar.xz',
-		'format' => 'tar',
-		'compressor' => ['xz'],
-		'disabled' => 1},
-
-	'zip' => {
-		'display' => 'zip',
-		'type' => 'application/x-zip',
-		'suffix' => '.zip',
-		'format' => 'zip'},
-);
+@git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 
-# Aliases so we understand old gitweb.snapshot values in repository
-# configuration.
-our %known_snapshot_format_aliases = (
-	'gzip'  => 'tgz',
-	'bzip2' => 'tbz2',
-	'xz'    => 'txz',
-
-	# backward compatibility: legacy gitweb config support
-	'x-gzip' => undef, 'gz' => undef,
-	'x-bzip2' => undef, 'bz2' => undef,
-	'x-zip' => undef, '' => undef,
-);
-
-# Pixel sizes for icons and avatars. If the default font sizes or lineheights
-# are changed, it may be appropriate to change these values too via
-# $GITWEB_CONFIG.
-our %avatar_size = (
-	'default' => 16,
-	'double'  => 32
-);
-
-# Used to set the maximum load that we will still respond to gitweb queries.
-# If server load exceed this value then return "503 server busy" error.
-# If gitweb cannot determined server load, it is taken to be 0.
-# Leave it undefined (or set to 'undef') to turn off load checking.
-our $maxload = 300;
-
-# You define site-wide feature defaults here; override them with
-# $GITWEB_CONFIG as necessary.
-our %feature = (
-	# feature => {
-	# 	'sub' => feature-sub (subroutine),
-	# 	'override' => allow-override (boolean),
-	# 	'default' => [ default options...] (array reference)}
-	#
-	# if feature is overridable (it means that allow-override has true value),
-	# then feature-sub will be called with default options as parameters;
-	# return value of feature-sub indicates if to enable specified feature
-	#
-	# if there is no 'sub' key (no feature-sub), then feature cannot be
-	# overriden
-	#
-	# use gitweb_get_feature(<feature>) to retrieve the <feature> value
-	# (an array) or gitweb_check_feature(<feature>) to check if <feature>
-	# is enabled
-
-	# Enable the 'blame' blob view, showing the last commit that modified
-	# each line in the file. This can be very CPU-intensive.
-
-	# To enable system wide have in $GITWEB_CONFIG
-	# $feature{'blame'}{'default'} = [1];
-	# To have project specific config enable override in $GITWEB_CONFIG
-	# $feature{'blame'}{'override'} = 1;
-	# and in project config gitweb.blame = 0|1;
-	'blame' => {
-		'sub' => sub { feature_bool('blame', @_) },
-		'override' => 0,
-		'default' => [0]},
-
-	# Enable the 'snapshot' link, providing a compressed archive of any
-	# tree. This can potentially generate high traffic if you have large
-	# project.
-
-	# Value is a list of formats defined in %known_snapshot_formats that
-	# you wish to offer.
-	# To disable system wide have in $GITWEB_CONFIG
-	# $feature{'snapshot'}{'default'} = [];
-	# To have project specific config enable override in $GITWEB_CONFIG
-	# $feature{'snapshot'}{'override'} = 1;
-	# and in project config, a comma-separated list of formats or "none"
-	# to disable.  Example: gitweb.snapshot = tbz2,zip;
-	'snapshot' => {
-		'sub' => \&feature_snapshot,
-		'override' => 0,
-		'default' => ['tgz']},
-
-	# Enable text search, which will list the commits which match author,
-	# committer or commit text to a given string.  Enabled by default.
-	# Project specific override is not supported.
-	'search' => {
-		'override' => 0,
-		'default' => [1]},
-
-	# Enable grep search, which will list the files in currently selected
-	# tree containing the given string. Enabled by default. This can be
-	# potentially CPU-intensive, of course.
-
-	# To enable system wide have in $GITWEB_CONFIG
-	# $feature{'grep'}{'default'} = [1];
-	# To have project specific config enable override in $GITWEB_CONFIG
-	# $feature{'grep'}{'override'} = 1;
-	# and in project config gitweb.grep = 0|1;
-	'grep' => {
-		'sub' => sub { feature_bool('grep', @_) },
-		'override' => 0,
-		'default' => [1]},
-
-	# Enable the pickaxe search, which will list the commits that modified
-	# a given string in a file. This can be practical and quite faster
-	# alternative to 'blame', but still potentially CPU-intensive.
-
-	# To enable system wide have in $GITWEB_CONFIG
-	# $feature{'pickaxe'}{'default'} = [1];
-	# To have project specific config enable override in $GITWEB_CONFIG
-	# $feature{'pickaxe'}{'override'} = 1;
-	# and in project config gitweb.pickaxe = 0|1;
-	'pickaxe' => {
-		'sub' => sub { feature_bool('pickaxe', @_) },
-		'override' => 0,
-		'default' => [1]},
-
-	# Enable showing size of blobs in a 'tree' view, in a separate
-	# column, similar to what 'ls -l' does.  This cost a bit of IO.
-
-	# To disable system wide have in $GITWEB_CONFIG
-	# $feature{'show-sizes'}{'default'} = [0];
-	# To have project specific config enable override in $GITWEB_CONFIG
-	# $feature{'show-sizes'}{'override'} = 1;
-	# and in project config gitweb.showsizes = 0|1;
-	'show-sizes' => {
-		'sub' => sub { feature_bool('showsizes', @_) },
-		'override' => 0,
-		'default' => [1]},
-
-	# Make gitweb use an alternative format of the URLs which can be
-	# more readable and natural-looking: project name is embedded
-	# directly in the path and the query string contains other
-	# auxiliary information. All gitweb installations recognize
-	# URL in either format; this configures in which formats gitweb
-	# generates links.
-
-	# To enable system wide have in $GITWEB_CONFIG
-	# $feature{'pathinfo'}{'default'} = [1];
-	# Project specific override is not supported.
-
-	# Note that you will need to change the default location of CSS,
-	# favicon, logo and possibly other files to an absolute URL. Also,
-	# if gitweb.cgi serves as your indexfile, you will need to force
-	# $my_uri to contain the script name in your $GITWEB_CONFIG.
-	'pathinfo' => {
-		'override' => 0,
-		'default' => [0]},
-
-	# Make gitweb consider projects in project root subdirectories
-	# to be forks of existing projects. Given project $projname.git,
-	# projects matching $projname/*.git will not be shown in the main
-	# projects list, instead a '+' mark will be added to $projname
-	# there and a 'forks' view will be enabled for the project, listing
-	# all the forks. If project list is taken from a file, forks have
-	# to be listed after the main project.
-
-	# To enable system wide have in $GITWEB_CONFIG
-	# $feature{'forks'}{'default'} = [1];
-	# Project specific override is not supported.
-	'forks' => {
-		'override' => 0,
-		'default' => [0]},
-
-	# Insert custom links to the action bar of all project pages.
-	# This enables you mainly to link to third-party scripts integrating
-	# into gitweb; e.g. git-browser for graphical history representation
-	# or custom web-based repository administration interface.
-
-	# The 'default' value consists of a list of triplets in the form
-	# (label, link, position) where position is the label after which
-	# to insert the link and link is a format string where %n expands
-	# to the project name, %f to the project path within the filesystem,
-	# %h to the current hash (h gitweb parameter) and %b to the current
-	# hash base (hb gitweb parameter); %% expands to %.
-
-	# To enable system wide have in $GITWEB_CONFIG e.g.
-	# $feature{'actions'}{'default'} = [('graphiclog',
-	# 	'/git-browser/by-commit.html?r=%n', 'summary')];
-	# Project specific override is not supported.
-	'actions' => {
-		'override' => 0,
-		'default' => []},
-
-	# Allow gitweb scan project content tags described in ctags/
-	# of project repository, and display the popular Web 2.0-ish
-	# "tag cloud" near the project list. Note that this is something
-	# COMPLETELY different from the normal Git tags.
-
-	# gitweb by itself can show existing tags, but it does not handle
-	# tagging itself; you need an external application for that.
-	# For an example script, check Girocco's cgi/tagproj.cgi.
-	# You may want to install the HTML::TagCloud Perl module to get
-	# a pretty tag cloud instead of just a list of tags.
-
-	# To enable system wide have in $GITWEB_CONFIG
-	# $feature{'ctags'}{'default'} = ['path_to_tag_script'];
-	# Project specific override is not supported.
-	'ctags' => {
-		'override' => 0,
-		'default' => [0]},
-
-	# The maximum number of patches in a patchset generated in patch
-	# view. Set this to 0 or undef to disable patch view, or to a
-	# negative number to remove any limit.
-
-	# To disable system wide have in $GITWEB_CONFIG
-	# $feature{'patches'}{'default'} = [0];
-	# To have project specific config enable override in $GITWEB_CONFIG
-	# $feature{'patches'}{'override'} = 1;
-	# and in project config gitweb.patches = 0|n;
-	# where n is the maximum number of patches allowed in a patchset.
-	'patches' => {
-		'sub' => \&feature_patches,
-		'override' => 0,
-		'default' => [16]},
-
-	# Avatar support. When this feature is enabled, views such as
-	# shortlog or commit will display an avatar associated with
-	# the email of the committer(s) and/or author(s).
-
-	# Currently available providers are gravatar and picon.
-	# If an unknown provider is specified, the feature is disabled.
-
-	# Gravatar depends on Digest::MD5.
-	# Picon currently relies on the indiana.edu database.
-
-	# To enable system wide have in $GITWEB_CONFIG
-	# $feature{'avatar'}{'default'} = ['<provider>'];
-	# where <provider> is either gravatar or picon.
-	# To have project specific config enable override in $GITWEB_CONFIG
-	# $feature{'avatar'}{'override'} = 1;
-	# and in project config gitweb.avatar = <provider>;
-	'avatar' => {
-		'sub' => \&feature_avatar,
-		'override' => 0,
-		'default' => ['']},
-
-	# Enable displaying how much time and how many git commands
-	# it took to generate and display page.  Disabled by default.
-	# Project specific override is not supported.
-	'timed' => {
-		'override' => 0,
-		'default' => [0]},
-
-	# Enable turning some links into links to actions which require
-	# JavaScript to run (like 'blame_incremental').  Not enabled by
-	# default.  Project specific override is currently not supported.
-	'javascript-actions' => {
-		'override' => 0,
-		'default' => [0]},
-
-	# Syntax highlighting support. This is based on Daniel Svensson's
-	# and Sham Chukoury's work in gitweb-xmms2.git.
-	# It requires the 'highlight' program present in $PATH,
-	# and therefore is disabled by default.
-
-	# To enable system wide have in $GITWEB_CONFIG
-	# $feature{'highlight'}{'default'} = [1];
-
-	'highlight' => {
-		'sub' => sub { feature_bool('highlight', @_) },
-		'override' => 0,
-		'default' => [0]},
-);
+$GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
+$GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 
 sub gitweb_get_feature {
 	my ($name) = @_;
@@ -571,20 +230,6 @@ sub filter_snapshot_fmts {
 		!$known_snapshot_formats{$_}{'disabled'}} @fmts;
 }
 
-our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
-sub evaluate_gitweb_config {
-	our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
-	our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
-	# die if there are errors parsing config file
-	if (-e $GITWEB_CONFIG) {
-		do $GITWEB_CONFIG;
-		die $@ if $@;
-	} elsif (-e $GITWEB_CONFIG_SYSTEM) {
-		do $GITWEB_CONFIG_SYSTEM;
-		die $@ if $@;
-	}
-}
-
 # Get loadavg of system, to compare against $maxload.
 # Currently it requires '/proc/loadavg' present to get loadavg;
 # if it is not present it returns 0, which means no load checking.
@@ -607,13 +252,6 @@ sub get_loadavg {
 	return 0;
 }
 
-# version of the core git binary
-our $git_version;
-sub evaluate_git_version {
-	our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
-	$number_of_git_cmds++;
-}
-
 sub check_loadavg {
 	if (defined $maxload && get_loadavg() > $maxload) {
 		die_error(503, "The load average on the server is too high");
@@ -1028,7 +666,7 @@ sub dispatch {
 }
 
 sub run_request {
-	our $t0 = [Time::HiRes::gettimeofday()]
+	$t0 = [Time::HiRes::gettimeofday()]
 		if defined $t0;
 
 	evaluate_uri();
@@ -2555,9 +2193,6 @@ sub git_get_projects_list {
 			follow_skip => 2, # ignore duplicates
 			dangling_symlinks => 0, # ignore dangling symlinks, silently
 			wanted => sub {
-				# global variables
-				our $project_maxdepth;
-				our $projectroot;
 				# skip project-list toplevel, if we get it.
 				return if (m!^[/.]$!);
 				# only directories can be git repositories
diff --git a/gitweb/lib/Gitweb/Config.pm b/gitweb/lib/Gitweb/Config.pm
new file mode 100644
index 0000000..cb8efa5
--- /dev/null
+++ b/gitweb/lib/Gitweb/Config.pm
@@ -0,0 +1,413 @@
+#!/usr/bin/perl
+#
+# Gitweb::Config -- gitweb configuration package
+#
+# This program is licensed under the GPLv2
+
+package Gitweb::Config;
+
+use strict;
+use warnings;
+use Exporter qw(import);
+
+our @ISA = qw(Exporter);
+our @EXPORT = qw($t0 $number_of_git_cmds $GIT $version $git_version $projectroot $project_maxdepth
+                 $projects_list @git_base_url_list $export_ok $strict_export $home_link_str $site_name
+                 $site_header $site_footer $home_text @stylesheets $stylesheet $logo $favicon $javascript
+                 $GITWEB_CONFIG $GITWEB_CONFIG_SYSTEM $logo_url $logo_label $default_projects_order
+                 $projects_list_description_width $export_auth_hook $default_blob_plain_mimetype $mimetypes_file
+                 $default_text_plain_charset $fallback_encoding @diff_opts $prevent_xss $maxload %avatar_size
+                 %known_snapshot_formats %known_snapshot_format_aliases %feature &evaluate_gitweb_config
+                 &evaluate_git_version);
+
+# Runtime variables
+our $t0;
+if (eval { require Time::HiRes; 1; }) {
+	$t0 = [Time::HiRes::gettimeofday()];
+}
+our $number_of_git_cmds = 0;
+
+# The following variables are affected by build-time configuration
+# and hence their initialisation is put in gitweb.perl script
+
+# core git executable path and versions
+our ($GIT, $version, $git_version);
+
+# fs-path, fs traversing limit, source of projects list and git base URL
+our ($projectroot, $project_maxdepth, $projects_list, @git_base_url_list);
+
+our ($export_ok, $strict_export);
+
+# Site configurations
+our ($home_link_str, $site_name, $site_header, $site_footer, $home_text);
+
+# Stylesheet, logo and javascript
+our (@stylesheets, $stylesheet, $logo, $favicon, $javascript);
+
+# gitweb config
+our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
+
+# URI and label (title) of GIT logo link
+#our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
+#our $logo_label = "git documentation";
+our $logo_url = "http://git-scm.com/";
+our $logo_label = "git homepage";
+
+# the width (in characters) of the projects list "Description" column
+our $projects_list_description_width = 25;
+
+# default order of projects list
+# valid values are none, project, descr, owner, and age
+our $default_projects_order = "project";
+
+# show repository only if this subroutine returns true
+# when given the path to the project, for example:
+#    sub { return -e "$_[0]/git-daemon-export-ok"; }
+our $export_auth_hook = undef;
+
+# default blob_plain mimetype and default charset for text/plain blob
+our $default_blob_plain_mimetype = 'text/plain';
+our $default_text_plain_charset  = undef;
+
+# file to use for guessing MIME types before trying /etc/mime.types
+# (relative to the current git repository)
+our $mimetypes_file = undef;
+
+# assume this charset if line contains non-UTF-8 characters;
+# it should be valid encoding (see Encoding::Supported(3pm) for list),
+# for which encoding all byte sequences are valid, for example
+# 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
+# could be even 'utf-8' for the old behavior)
+our $fallback_encoding = 'latin1';
+
+# rename detection options for git-diff and git-diff-tree
+# - default is '-M', with the cost proportional to
+#   (number of removed files) * (number of new files).
+# - more costly is '-C' (which implies '-M'), with the cost proportional to
+#   (number of changed files + number of removed files) * (number of new files)
+# - even more costly is '-C', '--find-copies-harder' with cost
+#   (number of files in the original tree) * (number of new files)
+# - one might want to include '-B' option, e.g. '-B', '-M'
+our @diff_opts = ('-M'); # taken from git_commit
+
+# Disables features that would allow repository owners to inject script into
+# the gitweb domain.
+our $prevent_xss = 0;
+
+# information about snapshot formats that gitweb is capable of serving
+our %known_snapshot_formats = (
+	# name => {
+	# 	'display' => display name,
+	# 	'type' => mime type,
+	# 	'suffix' => filename suffix,
+	# 	'format' => --format for git-archive,
+	# 	'compressor' => [compressor command and arguments]
+	# 	                (array reference, optional)
+	# 	'disabled' => boolean (optional)}
+	#
+	'tgz' => {
+		'display' => 'tar.gz',
+		'type' => 'application/x-gzip',
+		'suffix' => '.tar.gz',
+		'format' => 'tar',
+		'compressor' => ['gzip']},
+
+	'tbz2' => {
+		'display' => 'tar.bz2',
+		'type' => 'application/x-bzip2',
+		'suffix' => '.tar.bz2',
+		'format' => 'tar',
+		'compressor' => ['bzip2']},
+
+	'txz' => {
+		'display' => 'tar.xz',
+		'type' => 'application/x-xz',
+		'suffix' => '.tar.xz',
+		'format' => 'tar',
+		'compressor' => ['xz'],
+		'disabled' => 1},
+
+	'zip' => {
+		'display' => 'zip',
+		'type' => 'application/x-zip',
+		'suffix' => '.zip',
+		'format' => 'zip'},
+);
+
+# Aliases so we understand old gitweb.snapshot values in repository
+# configuration.
+our %known_snapshot_format_aliases = (
+	'gzip'  => 'tgz',
+	'bzip2' => 'tbz2',
+	'xz'    => 'txz',
+
+	# backward compatibility: legacy gitweb config support
+	'x-gzip' => undef, 'gz' => undef,
+	'x-bzip2' => undef, 'bz2' => undef,
+	'x-zip' => undef, '' => undef,
+);
+
+# Pixel sizes for icons and avatars. If the default font sizes or lineheights
+# are changed, it may be appropriate to change these values too via
+# $GITWEB_CONFIG.
+our %avatar_size = (
+	'default' => 16,
+	'double'  => 32
+);
+
+# Used to set the maximum load that we will still respond to gitweb queries.
+# If server load exceed this value then return "503 server busy" error.
+# If gitweb cannot determined server load, it is taken to be 0.
+# Leave it undefined (or set to 'undef') to turn off load checking.
+our $maxload = 300;
+
+# You define site-wide feature defaults here; override them with
+# $GITWEB_CONFIG as necessary.
+our %feature = (
+	# feature => {
+	# 	'sub' => feature-sub (subroutine),
+	# 	'override' => allow-override (boolean),
+	# 	'default' => [ default options...] (array reference)}
+	#
+	# if feature is overridable (it means that allow-override has true value),
+	# then feature-sub will be called with default options as parameters;
+	# return value of feature-sub indicates if to enable specified feature
+	#
+	# if there is no 'sub' key (no feature-sub), then feature cannot be
+	# overriden
+	#
+	# use gitweb_get_feature(<feature>) to retrieve the <feature> value
+	# (an array) or gitweb_check_feature(<feature>) to check if <feature>
+	# is enabled
+
+	# Enable the 'blame' blob view, showing the last commit that modified
+	# each line in the file. This can be very CPU-intensive.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'blame'}{'default'} = [1];
+	# To have project specific config enable override in $GITWEB_CONFIG
+	# $feature{'blame'}{'override'} = 1;
+	# and in project config gitweb.blame = 0|1;
+	'blame' => {
+		'sub' => sub { feature_bool('blame', @_) },
+		'override' => 0,
+		'default' => [0]},
+
+	# Enable the 'snapshot' link, providing a compressed archive of any
+	# tree. This can potentially generate high traffic if you have large
+	# project.
+
+	# Value is a list of formats defined in %Gitweb::Config::known_snapshot_formats that
+	# you wish to offer.
+	# To disable system wide have in $GITWEB_CONFIG
+	# $feature{'snapshot'}{'default'} = [];
+	# To have project specific config enable override in $GITWEB_CONFIG
+	# $feature{'snapshot'}{'override'} = 1;
+	# and in project config, a comma-separated list of formats or "none"
+	# to disable.  Example: gitweb.snapshot = tbz2,zip;
+	'snapshot' => {
+		'sub' => \&feature_snapshot,
+		'override' => 0,
+		'default' => ['tgz']},
+
+	# Enable text search, which will list the commits which match author,
+	# committer or commit text to a given string.  Enabled by default.
+	# Project specific override is not supported.
+	'search' => {
+		'override' => 0,
+		'default' => [1]},
+
+	# Enable grep search, which will list the files in currently selected
+	# tree containing the given string. Enabled by default. This can be
+	# potentially CPU-intensive, of course.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'grep'}{'default'} = [1];
+	# To have project specific config enable override in $GITWEB_CONFIG
+	# $feature{'grep'}{'override'} = 1;
+	# and in project config gitweb.grep = 0|1;
+	'grep' => {
+		'sub' => sub { feature_bool('grep', @_) },
+		'override' => 0,
+		'default' => [1]},
+
+	# Enable the pickaxe search, which will list the commits that modified
+	# a given string in a file. This can be practical and quite faster
+	# alternative to 'blame', but still potentially CPU-intensive.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'pickaxe'}{'default'} = [1];
+	# To have project specific config enable override in $GITWEB_CONFIG
+	# $feature{'pickaxe'}{'override'} = 1;
+	# and in project config gitweb.pickaxe = 0|1;
+	'pickaxe' => {
+		'sub' => sub { feature_bool('pickaxe', @_) },
+		'override' => 0,
+		'default' => [1]},
+
+	# Enable showing size of blobs in a 'tree' view, in a separate
+	# column, similar to what 'ls -l' does.  This cost a bit of IO.
+
+	# To disable system wide have in $GITWEB_CONFIG
+	# $feature{'show-sizes'}{'default'} = [0];
+	# To have project specific config enable override in $GITWEB_CONFIG
+	# $feature{'show-sizes'}{'override'} = 1;
+	# and in project config gitweb.showsizes = 0|1;
+	'show-sizes' => {
+		'sub' => sub { feature_bool('showsizes', @_) },
+		'override' => 0,
+		'default' => [1]},
+
+	# Make gitweb use an alternative format of the URLs which can be
+	# more readable and natural-looking: project name is embedded
+	# directly in the path and the query string contains other
+	# auxiliary information. All gitweb installations recognize
+	# URL in either format; this configures in which formats gitweb
+	# generates links.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'pathinfo'}{'default'} = [1];
+	# Project specific override is not supported.
+
+	# Note that you will need to change the default location of CSS,
+	# favicon, logo and possibly other files to an absolute URL. Also,
+	# if gitweb.cgi serves as your indexfile, you will need to force
+	# $my_uri to contain the script name in your $GITWEB_CONFIG.
+	'pathinfo' => {
+		'override' => 0,
+		'default' => [0]},
+
+	# Make gitweb consider projects in project root subdirectories
+	# to be forks of existing projects. Given project $projname.git,
+	# projects matching $projname/*.git will not be shown in the main
+	# projects list, instead a '+' mark will be added to $projname
+	# there and a 'forks' view will be enabled for the project, listing
+	# all the forks. If project list is taken from a file, forks have
+	# to be listed after the main project.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'forks'}{'default'} = [1];
+	# Project specific override is not supported.
+	'forks' => {
+		'override' => 0,
+		'default' => [0]},
+
+	# Insert custom links to the action bar of all project pages.
+	# This enables you mainly to link to third-party scripts integrating
+	# into gitweb; e.g. git-browser for graphical history representation
+	# or custom web-based repository administration interface.
+
+	# The 'default' value consists of a list of triplets in the form
+	# (label, link, position) where position is the label after which
+	# to insert the link and link is a format string where %n expands
+	# to the project name, %f to the project path within the filesystem,
+	# %h to the current hash (h gitweb parameter) and %b to the current
+	# hash base (hb gitweb parameter); %% expands to %.
+
+	# To enable system wide have in $GITWEB_CONFIG e.g.
+	# $feature{'actions'}{'default'} = [('graphiclog',
+	# 	'/git-browser/by-commit.html?r=%n', 'summary')];
+	# Project specific override is not supported.
+	'actions' => {
+		'override' => 0,
+		'default' => []},
+
+	# Allow gitweb scan project content tags described in ctags/
+	# of project repository, and display the popular Web 2.0-ish
+	# "tag cloud" near the project list. Note that this is something
+	# COMPLETELY different from the normal Git tags.
+
+	# gitweb by itself can show existing tags, but it does not handle
+	# tagging itself; you need an external application for that.
+	# For an example script, check Girocco's cgi/tagproj.cgi.
+	# You may want to install the HTML::TagCloud Perl module to get
+	# a pretty tag cloud instead of just a list of tags.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'ctags'}{'default'} = ['path_to_tag_script'];
+	# Project specific override is not supported.
+	'ctags' => {
+		'override' => 0,
+		'default' => [0]},
+
+	# The maximum number of patches in a patchset generated in patch
+	# view. Set this to 0 or undef to disable patch view, or to a
+	# negative number to remove any limit.
+
+	# To disable system wide have in $GITWEB_CONFIG
+	# $feature{'patches'}{'default'} = [0];
+	# To have project specific config enable override in $GITWEB_CONFIG
+	# $feature{'patches'}{'override'} = 1;
+	# and in project config gitweb.patches = 0|n;
+	# where n is the maximum number of patches allowed in a patchset.
+	'patches' => {
+		'sub' => \&feature_patches,
+		'override' => 0,
+		'default' => [16]},
+
+	# Avatar support. When this feature is enabled, views such as
+	# shortlog or commit will display an avatar associated with
+	# the email of the committer(s) and/or author(s).
+
+	# Currently available providers are gravatar and picon.
+	# If an unknown provider is specified, the feature is disabled.
+
+	# Gravatar depends on Digest::MD5.
+	# Picon currently relies on the indiana.edu database.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'avatar'}{'default'} = ['<provider>'];
+	# where <provider> is either gravatar or picon.
+	# To have project specific config enable override in $GITWEB_CONFIG
+	# $feature{'avatar'}{'override'} = 1;
+	# and in project config gitweb.avatar = <provider>;
+	'avatar' => {
+		'sub' => \&feature_avatar,
+		'override' => 0,
+		'default' => ['']},
+
+	# Enable displaying how much time and how many git commands
+	# it took to generate and display page.  Disabled by default.
+	# Project specific override is not supported.
+	'timed' => {
+		'override' => 0,
+		'default' => [0]},
+
+	# Enable turning some links into links to actions which require
+	# JavaScript to run (like 'blame_incremental').  Not enabled by
+	# default.  Project specific override is currently not supported.
+	'javascript-actions' => {
+		'override' => 0,
+		'default' => [0]},
+
+	# Syntax highlighting support. This is based on Daniel Svensson's
+	# and Sham Chukoury's work in gitweb-xmms2.git.
+	# It requires the 'highlight' program present in $PATH,
+	# and therefore is disabled by default.
+
+	# To enable system wide have in $GITWEB_CONFIG
+	# $feature{'highlight'}{'default'} = [1];
+
+	'highlight' => {
+		'sub' => sub { feature_bool('highlight', @_) },
+		'override' => 0,
+		'default' => [0]},
+);
+
+sub evaluate_gitweb_config {
+	# die if there are errors parsing config file
+	if (-e $GITWEB_CONFIG) {
+		do $GITWEB_CONFIG;
+		die $@ if $@;
+	} elsif (-e $GITWEB_CONFIG_SYSTEM) {
+		do $GITWEB_CONFIG_SYSTEM;
+		die $@ if $@;
+	}
+}
+
+sub evaluate_git_version {
+	$git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
+	$number_of_git_cmds++;
+}
+
+1;
-- 
1.7.1.447.gfddfb