// Create a directory inside of `std::env::temp_dir()`, named with

// the prefix "example".

let tmp_dir = TempDir::new("example").expect("create temp dir");

let file_path = tmp_dir.path().join("my-temporary-note.txt");

let mut tmp_file = File::create(file_path).expect("create temp file");

writeln!(tmp_file, "Brian was here. Briefly.").expect("write temp file");

// By closing the `TempDir` explicitly, we can check that it has

// been deleted successfully. If we don't close it explicitly,

// the directory will still be deleted when `tmp_dir` goes out

// of scope, but we won't know whether deleting the directory

// succeeded.

drop(tmp_file);

tmp_dir.close().expect("delete temp dir");