rails--rails/railties/lib/rails/dev_caching.rb

require "fileutils"

module Rails
  module DevCaching # :nodoc:
    class << self
      FILE = "tmp/caching-dev.txt"

      def enable_by_file
        FileUtils.mkdir_p("tmp")

        if File.exist?(FILE)
          delete_cache_file
          puts "Development mode is no longer being cached."
        else
          create_cache_file
          puts "Development mode is now being cached."
        end

        FileUtils.touch "tmp/restart.txt"
        FileUtils.rm_f("tmp/pids/server.pid")
      end

      def enable_by_argument(caching)
        FileUtils.mkdir_p("tmp")

        if caching
          create_cache_file
        elsif caching == false && File.exist?(FILE)
          delete_cache_file
        end
      end

      private
        def create_cache_file
          FileUtils.touch FILE
        end

        def delete_cache_file
          File.delete FILE
        end
    end
  end
end