Function resolveLogPath

src/mongo_logger.ts:266–289

* resolves the MONGODB_LOG_PATH and mongodbLogPath options from the environment and the * mongo client options respectively. The mongodbLogPath can be either 'stdout', 'stderr', a NodeJS * Writable or an object which has a `write` method with the signature: * ```ts * write(log: Log): void * ```

(
  { MONGODB_LOG_PATH }: MongoLoggerEnvOptions,
  { mongodbLogPath }: MongoLoggerMongoClientOptions
)

 * @returns the MongoDBLogWritable object to write logs to
 */
function resolveLogPath(
  { MONGODB_LOG_PATH }: MongoLoggerEnvOptions,
  { mongodbLogPath }: MongoLoggerMongoClientOptions
): { mongodbLogPath: MongoDBLogWritable; mongodbLogPathIsStdErr: boolean } {
  if (typeof mongodbLogPath === 'string' && /^stderr$/i.test(mongodbLogPath)) {
    return { mongodbLogPath: createStdioLogger(process.stderr), mongodbLogPathIsStdErr: true };
  }
  if (typeof mongodbLogPath === 'string' && /^stdout$/i.test(mongodbLogPath)) {
    return { mongodbLogPath: createStdioLogger(process.stdout), mongodbLogPathIsStdErr: false };
  }

  if (typeof mongodbLogPath === 'object' && typeof mongodbLogPath?.write === 'function') {
    return { mongodbLogPath: mongodbLogPath, mongodbLogPathIsStdErr: false };
  }

  if (MONGODB_LOG_PATH && /^stderr$/i.test(MONGODB_LOG_PATH)) {
    return { mongodbLogPath: createStdioLogger(process.stderr), mongodbLogPathIsStdErr: true };
  }
  if (MONGODB_LOG_PATH && /^stdout$/i.test(MONGODB_LOG_PATH)) {
    return { mongodbLogPath: createStdioLogger(process.stdout), mongodbLogPathIsStdErr: false };
  }

  return { mongodbLogPath: createStdioLogger(process.stderr), mongodbLogPathIsStdErr: true };
}

function resolveSeverityConfiguration(
  clientOption: string | undefined,