asset-data-url sass helper

sass_asset_data_url_helper.rb

# `asset-data-url` sass helper
# quick fix for: https://github.com/rails/sass-rails/pull/46
unless Sass::Script::Functions.method_defined?(:asset_data_url)
  module Sass
    module Extra
      module Helpers

        def asset_data_url(path)
          data = context_asset_data_uri(path.value)
          Sass::Script::String.new(%Q{url(#{data})})
        end

      protected
        def context_asset_data_uri(path)
          options[:custom][:resolver].context.asset_data_uri(path)
        end
      end
    end
  end

  module Sass
    module Script
      module Functions
        include Sass::Extra::Helpers
      end
    end
  end
else
  Rails.logger.warn "THIS FILE IS NO LONGER NECESSARY: #{__FILE__}"
end