pub fn save_state<T: Serialize>(path: &Path, state: &T) -> Result<()>Expand description
Save state to a JSON file atomically.
Writes to a temporary file in the same directory, then renames it into place. This guarantees that the state file is always either the old version or the new version, never a partially-written mix.
Parent directories are created automatically if they don’t exist.
§Errors
Returns io::Error if serialization, directory creation, writing,
or renaming fails.