SimpleConfigurable 
Simple configuration module for specifying the configuration attributes of a class using a very simple syntax.
Installation
Add this line to your application's Gemfile:
gem 'simple_configurable'And then execute:
$ bundle
Or install it yourself as:
$ gem install simple_configurable
Usage
class Test
include SimpleConfigurable.with :enabled, :email
end
Test.configure do |config|
config.enabled = true
config.email = 'test@example.com'
end
Test.config
=> #<#<Class:0x00000001c80590>:0x00000001c5c870 @enabled=true, @email="test@example.com">License
The gem is available as open source under the terms of the MIT License.