build

# File actionpack/lib/action_controller/routing/builder.rb, line 157
      def build(path, options)
        # Wrap the path with slashes
        path = "/#{path}" unless path[0] == ?/
        path = "#{path}/" unless path[-1] == ?/

        prefix = options[:path_prefix].to_s.gsub(/^\//,'')
        path = "/#{prefix}#{path}" unless prefix.blank?

        segments = segments_for_route_path(path)
        defaults, requirements, conditions = divide_route_options(segments, options)
        requirements = assign_route_options(segments, defaults, requirements)

        # TODO: Segments should be frozen on initialize
        segments.each { |segment| segment.freeze }

        route = Route.new(segments, requirements, conditions)

        if !route.significant_keys.include?(:controller)
          raise ArgumentError, "Illegal route: the :controller must be specified!"
        end

        route.freeze
      end