Specs

option(Keyword.t(), any(), any()) :: any()

Attempts to return a value from a given options list, using the application configs as a back-up. The application (used in Application.get_env/3) is assumed to be :waffle.

This assumes that the application environment is set using waffle as the application name.

If the value is not found in any of those location, an optional default value can be returned.

Specs

prepend_slash(String.t()) :: String.t()

If the given string does not already start with a forward slash, this function will prepend one and return the result.

Examples

> prepend_slash("some/path")
"/some/path"

> prepend_slash("/im/good")
"/im/good"

Specs

var(any()) :: any()

Accepts four forms of variables:

1. The tuple {:system, key}, which uses System.get_env/1.
2. The tuple {:app, key}, which uses Application.get_env/2.
3. The tuple {:app, app, key}, which usees Application.get_env/2.
4. Anything else which is returned as-is.

In the second form ({:app, key}), the application is assumed to be :waffle although this can be overriden using the third form ({:app, app, key}).