Config will return the correct input path given any input.

Exercises will return the correct exercises path given any input.

IsDir determines whether the given path is a valid directory path.

Recalculate sets exercism paths based on Home.

DirExercises is the default name of the directory for active users.

File is the default name of the JSON file where the config written.

Home by default will contact the location of your home directory.

XDGConfigHome will contain $XDG_CONFIG_HOME if it exists.