Method fromEnvironment

lib/util.js:1366–1421

* Populate a LoadConfig entirely from environment variables. * * This is the way a base config is normally accomplished, but not for independent loads. * * This function exists in part to reduce the circular dependency of variable initializations * in the config.js file * @param {s

(environments)

   * @returns {Load}
   */
  static fromEnvironment(environments) {
    let env = new Env();

    if (environments !== undefined) {
      environments = environments.split(',');
      env.setEnv('nodeEnv', environments.join(','));
    } else {
      let nodeConfigEnv = env.initParam('NODE_CONFIG_ENV');
      let nodeEnv = env.initParam('NODE_ENV');

      if (nodeConfigEnv) {
        env.setEnv('nodeEnv', 'NODE_CONFIG_ENV');
        nodeEnv = nodeConfigEnv;
      } else if (nodeEnv) {
        env.setEnv('nodeEnv', 'NODE_ENV');
        env.setEnv('NODE_CONFIG_ENV', nodeEnv); //TODO: This is a bug asserted in the tests
      } else {
        nodeEnv = 'development';
        env.setEnv('nodeEnv', 'default');
        env.setEnv('NODE_ENV', nodeEnv);
        env.setEnv('NODE_CONFIG_ENV', nodeEnv); //TODO: This is a bug asserted in the tests
      }

      environments = nodeEnv.split(',');
    }

    let configDir = env.initParam('NODE_CONFIG_DIR');
    let appInstance = env.initParam('NODE_APP_INSTANCE');
    let gitCrypt = !env.initParam('CONFIG_SKIP_GITCRYPT');
    let parser = _loadParser(env.initParam('NODE_CONFIG_PARSER'), configDir);
    let hostName = env.initParam('HOST') || env.initParam('HOSTNAME');

    // Determine the host name from the OS module, $HOST, or $HOSTNAME
    // Remove any . appendages, and default to null if not set
    try {
      if (!hostName) {
        hostName = OS.hostname();
      }
    } catch (e) {
      hostName = '';
    }

    env.setEnv('HOSTNAME', hostName);

    /** @type {LoadOptions} */
    let options = {
      configDir: configDir ?? DEFAULT_CONFIG_DIR,
      nodeEnv: environments,
      hostName,
      parser,
      appInstance,
      gitCrypt
    };

    return new Load(options, env);
  }
}