layeredyamlconfig

https://github.com/jf647/LayeredYAMLConfig

LayeredYAMLConfig provides a simple config file that supports multiple layers. Values in the right or uppermost layers override values in lower layers. This makes it easy to share configuration without duplication while still allowing what needs to be different to vary. For example: program.default.conf program.server_foo.conf program.site_bar.conf program.conf Optionally, leaf nodes can be evaluated using as ERB templates, feeding the configuration into itself.