Do not prompt for user feedback (#1043)

* Do not prompt for feedback
* Rename script to self-describe

Author: stephen-soltesz

cloudbuild.yaml

@@ -144,5 +144,5 @@ steps:
 - name: gcr.io/google.com/cloudsdktool/cloud-sdk
   id: "Delete non-serving appengine versions"
   args: [
-    'bash', '-c', './delete-appengine.sh'
+    'bash', '-c', './delete-appengine-services.sh'
   ]

delete-appengine.sh delete-appengine-services.shdelete-appengine.sh renamed to delete-appengine-services.sh

@@ -1,10 +1,10 @@
 #!/bin/bash
 #
-# delete-appengine.sh deletes all service versions after the 9 most recently
-# deployed versions with zero traffic split. This script is meant to run as a
-# late step of the cloudbuild deployment. Running this regularly will keep the
-# number of versions around 10 per service (for rollbacks) and below 210
-# globally (the hard limit imposed by AppEngine).
+# delete-appengine-services.sh deletes all service versions after the 9 most
+# recently deployed versions with zero traffic split. This script is meant to
+# run as a late step of the cloudbuild deployment. Running this regularly will
+# keep the number of versions around 10 per service (for rollbacks) and below
+# 210 globally (the hard limit imposed by AppEngine).
 
 # Example: Below is example output from `gcloud app versions list`. The
 # 'TRAFFIC_SPLIT' determines whether any traffic is directed to this service.
@@ -32,6 +32,9 @@
 # default                 20210420t174553  0.00           2021-04-20T13:46:37-04:00  SERVING
 # default                 20210409t180654  0.00           2021-04-09T14:07:38-04:00  SERVING
 
+# Do not prompt user for feedback.
+gcloud config set core/disable_prompts true
+
 # Delete service versions after the most recent 9 with a zero traffic split.
 # NOTE: any service version with a non-zero traffic split is never deleted.
 gcloud --project=${PROJECT_ID} \