config pattern

config.rb

MyGem.configure do |config|
  # Description of the setting here...
  config.setting1 = :value
end

module MyGem
  class Configuration
    attr_accessor :setting1, :setting2
  end
  
  class << self
    attr_reader :config

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