Backhead

The "backhead" was where the the gauges and controls sat on the old steam engines. This gem removes the tedium of defining rails engine configuration options

Include backhead into class. You can now define configuration options for your engine.

class MyEngine < Rails::Engine
  include Backhead

  configuration :my_engine do
    option :fast
    option :efficient
  end

  # standard engine stuff
  initializer 'my_engine.setup' do |app|
    MyEngine.enable_nitrus_mode() if app.config.my_engine.fast
    MyEngine.decrease_fuel_consumption() if app.config.my_engine.efficient
  end
end

This will create two new configuration options that users can set in their environment files: config.my_engine.fast and config.my_engine.efficient.

As a bonus, it will also allow users to set these configuration parameters via the environment variables MY_ENGINE_FAST and MY_ENGINE_EFFICIENT if they so choose. This gives more baked in flexibility to control the app and runtime rather than via source control.

Configuration options that are explicitly set during initialization will take precedence over those specified by environment variables