# File lib/nanoc/base/compilation/compiler_dsl.rb, line 173
    def passthrough(identifier, params={})
      # Require no block
      raise ArgumentError.new("#passthrough does not require a block") if block_given?

      # Get rep name
      rep_name = params[:rep] || :default

      # Create compilation rule
      compilation_block = proc { }
      compilation_rule = Rule.new(identifier_to_regex(identifier), rep_name, compilation_block)
      @rules_collection.add_item_compilation_rule(compilation_rule)

      # Create routing rule
      routing_block = proc do
        item[:extension].nil? ? item.identifier.chop : item.identifier.chop + '.' + item[:extension]
      end
      routing_rule = Rule.new(identifier_to_regex(identifier), rep_name, routing_block, :snapshot_name => :last)
      @rules_collection.add_item_routing_rule(routing_rule)
    end