I think it would be useful to have a function that would return the path of the current dotenv file, if one is currently being used. My use case is to pass the currently loaded dotenv file to docker run --env-file <dotenv path>. This seems nicer than specifying the dotenv path as an argument to the target, because it will load the expected dotenv file by default, and allow you to override it with just --dotenv-filename or just --dotenv-path, and the use of docker would be fully abstracted from the just user.