chore (samples) Warn user about fails on user_environment_setup.sh. (#490)

* Added error message on user setup.

* Divided sh script into steps for error handling.

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: dfirova

java-retail/samples/interactive-tutorials/user_environment_setup.sh

@@ -15,39 +15,60 @@
 # limitations under the License.
 
 # set the Google Cloud Project ID
-project_id=$1
-echo "Project ID: $project_id"
-gcloud config set project "$project_id"
+{
+  project_id=$1
+  echo "Project ID: $project_id"
+  gcloud config set project "$project_id"
 
-timestamp=$(date +%s)
+} && {
 
-service_account_id="service-acc-$timestamp"
-echo "Service Account: $service_account_id"
+  timestamp=$(date +%s)
 
-# create service account (your service-acc-$timestamp)
-gcloud iam service-accounts create "$service_account_id"
+  service_account_id="service-acc-$timestamp"
+  echo "Service Account: $service_account_id"
 
-# assign necessary roles to your new service account
-for role in {retail.admin,editor,bigquery.admin}
-  do
-    gcloud projects add-iam-policy-binding "$project_id" --member="serviceAccount:$service_account_id@$project_id.iam.gserviceaccount.com" --role=roles/"${role}"
-done
+  # create service account (your service-acc-$timestamp)
+  gcloud iam service-accounts create "$service_account_id"
 
-echo "Wait ~60 seconds to be sure the appropriate roles have been assigned to your service account"
-sleep 60
+} && {
 
-# upload your service account key file
-service_acc_email="$service_account_id@$project_id.iam.gserviceaccount.com"
-gcloud iam service-accounts keys create ~/key.json --iam-account "$service_acc_email"
+  # assign necessary roles to your new service account
+  for role in {retail.admin,editor,bigquery.admin}
+    do
+      gcloud projects add-iam-policy-binding "$project_id" --member="serviceAccount:$service_account_id@$project_id.iam.gserviceaccount.com" --role=roles/"${role}"
+  done
 
-# activate the service account using the key
-gcloud auth activate-service-account --key-file ~/key.json
+} && {
 
-# install needed Google client libraries
-cd ~/cloudshell_open/java-retail/samples/interactive-tutorials || exit
-mvn clean install -DskipTests
+  echo "Wait ~60 seconds to be sure the appropriate roles have been assigned to your service account"
+  sleep 60
 
-echo "========================================"
-echo "The Google Cloud setup is completed."
-echo "Please proceed with the Tutorial steps"
-echo "========================================"
+  # upload your service account key file
+  service_acc_email="$service_account_id@$project_id.iam.gserviceaccount.com"
+  gcloud iam service-accounts keys create ~/key.json --iam-account "$service_acc_email"
+
+  # activate the service account using the key
+  gcloud auth activate-service-account --key-file ~/key.json
+
+} && {
+
+  # install needed Google client libraries
+  cd ~/cloudshell_open/java-retail/samples/interactive-tutorials || exit
+  mvn clean install -DskipTests
+
+} && {
+
+  # Print success message
+  echo "========================================"
+  echo "The Google Cloud setup is completed."
+  echo "Please proceed with the Tutorial steps"
+  echo "========================================"
+
+} || {
+
+  # Print error message
+  echo "========================================"
+  echo "The Google Cloud setup was not completed."
+  echo "Please fix the errors above!"
+  echo "========================================"
+}