init static method
Implementation
static Future<void> init() async {
_configureFromEnv();
if (_initialized) return;
_initialized = true;
if (!fileLogging) {
return;
}
if (!await _logDir.exists()) await _logDir.create(recursive: true);
final fileName = _getLogFileName();
_logFile = File('${_logDir.path}/$fileName');
if (!await _logFile!.exists()) await _logFile!.create();
}