Environment variable overrides in Rails

gistfile1.rb

# Add config/overrides/*.yml to .gitignore
# and this near the top of application.rb
%w(defaults overrides).each do |type|
  path = File.expand_path("../#{type}/#{Rails.env}.yml", __FILE__)
  ENV.update(YAML.load_file(path)) if File.exist?(path)
end

# For things that are sensitive or developer dependent:
#   config/overrides/{development,test}.yml
# For everything else:
#   config/defaults/{development,test}.yml