"In a dynamic language, and where you trust the person doing the configuration, there's no reason why your configuration shouldn't be in a source file. Both Dja

"In a dynamic language, and where you trust the person doing the configuration, there's no reason why your configuration shouldn't be in a source file. Both Django and Rails do it this way." Not true. In Rails, sensitive information like database passwords or AWS keys are not stored in the source, you store them in configuration files, YAML files by default. It's also widely recommended that these not be checked into version control.