Function beforeEmulatorCommand

src/emulator/commandUtils.ts:153–193

(options: any)

 * uses the emulator suite.
 */
export async function beforeEmulatorCommand(options: any): Promise<any> {
  const optionsWithDefaultConfig = {
    ...options,
    config: DEFAULT_CONFIG,
  };
  const optionsWithConfig = options.config ? options : optionsWithDefaultConfig;

  // We want to be able to run most emulators even in the absence of
  // firebase.json. For Functions and Hosting we require the JSON file since the
  // config interactions can become fairly complex.
  const canStartWithoutConfig =
    options.only &&
    !controller.shouldStart(optionsWithConfig, Emulators.FUNCTIONS) &&
    !controller.shouldStart(optionsWithConfig, Emulators.HOSTING);

  // We generally should not check for auth if you are using a demo project since prod calls to a fake project will fail.
  // However, extensions makes 'publishers/*' calls that require auth, so we'll requireAuth if you are using extensions.
  if (
    !Constants.isDemoProject(options.project) ||
    controller.shouldStart(optionsWithConfig, Emulators.EXTENSIONS)
  ) {
    try {
      await requireAuth(options);
    } catch (e: unknown) {
      logger.debug(e as any);
      utils.logLabeledWarning(
        "emulators",
        `You are not currently authenticated so some features may not work correctly. Please run ${clc.bold(
          "firebase login",
        )} to authenticate the CLI.`,
      );
    }
  }

  if (canStartWithoutConfig && !options.config) {
    utils.logWarning("Could not find config (firebase.json) so using defaults.");
    options.config = DEFAULT_CONFIG;
  } else {
    await requireConfig(options);
  }
}

/**
 * Returns a literal port number if specified or true | false if enabled.