Support new SassImporter method signature

Fixes #195

Author: danielpclark

.gitignore

@@ -1,6 +1,7 @@
 *.gem
 *.rbc
 .bundle
+.idea
 .config
 .yardoc
 gemfiles/*.gemfile.lock

lib/compass-rails/patches/sass_importer.rb

@@ -7,9 +7,10 @@
 klass.class_eval do
   def evaluate(context, locals, &block)
     # Use custom importer that knows about Sprockets Caching
-    cache_store = Sprockets::SassCacheStore.new(context.environment)
+    cache_store = begin Sprockets::SassCacheStore.new(context.environment); rescue; nil; end ||
+        Sprockets::SassCacheStore.new(context.environment, "1")
     paths  = context.environment.paths.map { |path| CompassRails::SpriteImporter.new(context, path) }
-    paths += context.environment.paths.map { |path| self.class.parent::SassImporter.new(context, path) }
+    paths += context.environment.paths.map { |path| sass_importer(context, path) }
     paths += ::Rails.application.config.sass.load_paths
 
 
@@ -18,7 +19,7 @@ def evaluate(context, locals, &block)
       :line => line,
       :syntax => syntax,
       :cache_store => cache_store,
-      :importer => self.class.parent::SassImporter.new(context, context.pathname),
+      :importer => sass_importer(context, context.pathname),
       :load_paths => paths,
       :sprockets => {
         :context => context,
@@ -32,5 +33,11 @@ def evaluate(context, locals, &block)
     context.__LINE__ = e.sass_backtrace.first[:line]
     raise e
   end
+
+  private
+  def sass_importer(context, path)
+    begin self.class.parent::SassImporter.new(context, path); rescue; nil; end ||
+        self.class.parent::SassImporter.new(path)
+  end
 end