Overriding wrapping routes with a deprecation message.

routes-deprecated.rb

require 'kenji'

module Kenji
  class Controller
    class << self

      def routes_deprecated!(enabled = true)
        if enabled
          puts "Enabling deprecation for the following methods in #{self.name}:"
        else
          puts "Disabling deprecation in #{self.name}."
        end
        @deprecation_enabled = enabled
      end

      old_route = instance_method(:route)

      define_method(:route) do |*args, &block|
        if @deprecation_enabled
          # block -> unbound method
          define_method(:_tmp_route_action, &block)
          block = instance_method(:_tmp_route_action)
          remove_method(:_tmp_route_action)

          wrapped = lambda do |*a|
            warn "[DEPRECATED] route #{args} was called with args: #{a}"
            block.bind(self).call(*a)
          end
          old_route.bind(self).call(*args, &wrapped)

          puts "- route #{args}"
        else
          old_route.bind(self).call(*args, &block)
        end
      end
    end
  end
end