Function xdg::get_data_dirs_from_env

pub fn get_data_dirs_from_env<'a, F>(get_env_var: &'a F) -> Vec<PathBuf> where F: Fn(&'a str) -> Option<OsString>

Get the default data directories given a closure that returns the the value of an environment variable. This method allows having a custom environment.

If $XDG_DATA_DIRS is not set, it returns [/usr/local/share, /usr/share].