settings.rb

# Load application configuration
require 'ostruct'
require 'yaml'

config_path = File.expand_path('config/settings.yml', Rails.root)

begin
  config = YAML.load_file(config_path)
rescue Errno::ENOENT
  raise "Make sure the settings file #{config_path} exists."
end

Settings = OpenStruct.new(config[Rails.env])

# Settings.email['webmaster'] # => [email protected]
# Settings.fb_app_id # => 12334155661

settings.yml

defaults: &defaults
  host: 'localhost'
  fb_app_id: 12334155661
  email:
    webmaster: '[email protected]'
    careers: '[email protected]'

development:
  <<: *defaults
  host: 'bkwld.dev'

staging:
  <<: *defaults
  host: 'staging.bkwld.com'

test:
  <<: *defaults

production:
  <<: *defaults
  host: 'bkwld.com'
  fb_app_id: 12345678910
  email:
    webmaster: '[email protected]'
    careers: '[email protected]'