Method versionFailed

packages/service-worker/worker/src/driver.ts:975–1006

(appVersion: AppVersion, err: Error)

  }

  private async versionFailed(appVersion: AppVersion, err: Error): Promise<void> {
    // This particular AppVersion is broken. First, find the manifest hash.
    const broken = Array.from(this.versions.entries()).find(
      ([hash, version]) => version === appVersion,
    );

    if (broken === undefined) {
      // This version is no longer in use anyway, so nobody cares.
      return;
    }

    const brokenHash = broken[0];

    // The specified version is broken and new clients should not be served from it. However, it is
    // deemed even riskier to switch the existing clients to a different version or to the network.
    // Therefore, we keep clients on their current version (even if broken) and ensure that no new
    // clients will be assigned to it.

    // TODO: notify affected apps.

    // The action taken depends on whether the broken manifest is the active (latest) or not.
    // - If the broken version is not the latest, no further action is necessary, since new clients
    //   will be assigned to the latest version anyway.
    // - If the broken version is the latest, the SW cannot accept new clients (but can continue to
    //   service old ones).
    if (this.latestHash === brokenHash) {
      // The latest manifest is broken. This means that new clients are at the mercy of the network,
      // but caches continue to be valid for previous versions. This is unfortunate but unavoidable.
      this.state = DriverReadyState.EXISTING_CLIENTS_ONLY;
      this.stateMessage = `Degraded due to: ${errorToString(err)}`;
    }
  }

  private async setupUpdate(manifest: Manifest, hash: string): Promise<void> {
    try {