app_config_for

https://github.com/ChapterHouse/app_config_for

Rails::Application#config_for style capabilities for non-rails applications, gems, and rails engines. Observes RAILS_ENV, RACK_ENV, and custom env variables. For gems and engines, it supports default configs in engine/gem config directory that can be overridden by the consumer of your engine/gem by placing a configuration file in a top level config directory.