Make the Configuration class a singleton + added some access helpers to

the Compass module.

lib/compass/configuration.rb

@@ -1,6 +1,9 @@
+require 'singleton'
+
 module Compass
   class Configuration
-    attr_accessor :css_dir, :sass_dir, :images_dir, :javascripts_dir
+    include Singleton
+    attr_accessor :project_path, :css_dir, :sass_dir, :images_dir, :javascripts_dir
 
     # parses a manifest file which is a ruby script
     # evaluated in a Manifest instance context
@@ -14,4 +17,30 @@ module Compass
       binding
     end
   end
+
+  module ConfigHelpers
+    def configuration
+      if block_given?
+        yield Configuration.instance
+      end
+      Configuration.instance
+    end
+
+    def sass_plugin_configuration
+      proj_sass_path = File.join(configuration.project_path, configuration.sass_dir)
+      proj_css_path = File.join(configuration.project_path, configuration.css_dir)
+      locations = {proj_sass_path => proj_css_path}
+      Compass::Frameworks::ALL.each do |framework|
+        locations[framework.stylesheets_directory] = proj_css_path
+      end
+      {:template_location => locations}
+    end
+
+    def configure_sass_plugin!
+      Sass::Plugin.options.merge!(sass_plugin_configuration)
+    end
+  end
+
+  extend ConfigHelpers
+
 end

lib/compass/installers/stand_alone.rb

@@ -4,11 +4,10 @@ module Compass
     class StandAloneInstaller < Base
 
       def configure
-        @config = Compass::Configuration.new
         if File.exists?(config_file)
-          @config.parse(config_file) 
+          Compass.configuration.parse(config_file)
         elsif File.exists?(old_config_file)
-          @config.parse(old_config_file) 
+          Compass.configuration.parse(old_config_file)
         end
         super
       end
@@ -22,19 +21,19 @@ module Compass
       end
 
       def default_css_dir
-        @config.css_dir || "stylesheets"
+        Compass.configuration.css_dir || "stylesheets"
       end
 
       def default_sass_dir
-        @config.sass_dir ||"src"
+        Compass.configuration.sass_dir ||"src"
       end
 
       def default_images_dir
-        @config.images_dir || "images"
+        Compass.configuration.images_dir || "images"
       end
 
       def default_javascripts_dir
-        @config.javascripts_dir || "javascripts"
+        Compass.configuration.javascripts_dir || "javascripts"
       end
 
       # Read the configuration file for this project