src/cli_plugin/lib/log_warnings.js

/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the "Elastic License
 * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
 * Public License v 1"; you may not use this file except in compliance with, at
 * your election, the "Elastic License 2.0", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

export function logWarnings(logger) {
  process.on('warning', (warning) => {
    // deprecation warnings do no reflect a current problem for
    // the user and therefor should be filtered out.
    if (warning.name === 'DeprecationWarning') {
      return;
    }

    logger.error(warning);
  });
}