use env_perm; fn main() { // Check if DUMMY is set, if not set it to 1 // export DUMMY=1 env_perm::check_or_set("DUMMY", 1).expect("Failed to find or set DUMMY"); // Append $HOME/some/cool/bin to $PATH // export PATH= "$HOME/some/cool/bin:$PATH" env_perm::append("PATH", "$HOME/some/cool/bin").expect("Couldn't find PATH"); // Sets a variable without checking if it exists. // Note you need to use a raw string literal to include "" // export DUMMY="/something" env_perm::set("DUMMY", r#""/something""#).expect("Failed to set DUMMY"); }