ScotRuby tutorial exercise 2

configuration.rb

class Configuration
  attr_accessor :tail_logs, :max_connections, :admin_password
  
  def app_server(&block)
    @app_server_config ||= AppServer.new
    block.call @app_server_config if block_given?
    @app_server_config
  end

end

class AppServer
  attr_accessor :port, :admin_password
end

def self.configure
  config = Configuration.new
  yield config
  config
end

configuration = configure do |config|  
  config.tail_logs = true  
  config.max_connections = 55  
  config.admin_password = 'secret'  
  config.app_server do |app_server_config|
    app_server_config.port = 8808  
    app_server_config.admin_password = config.admin_password  
  end  
end  
  
puts configuration.class # => Configuration  
puts configuration.tail_logs # => true  
puts configuration.app_server.admin_password # => 'secret'