gcloud app deploy, flag to automate prompting? : <p>Is it possible to do silent deployment when using <code>gcloud app deploy</code></p>

<p>When I run the command <code>gcloud app deploy ./deployment/app.yaml --version v1</code> its always prompting for </p>

<p><code>Do you want to continue (Y/n)?  Y</code></p>

<p>how to automate this? 
is there any flag that we can pass in to mute this?  </p>
