Atom snippet - Ruby gem configuration template

snippets.cson

'.source.ruby':
  'Insert gem configuration block':
    'prefix': 'gconfig'
    'body':
      '''
      def self.configuration
        @configuration ||= Configuration.new
      end

      def self.config
        configuration
      end

      def self.configure
        yield(configuration) if block_given?
        configuration
      end

      class Configuration
        attr_accessor :${1}

        def initialize
          @${1}
        end
      end
      '''