Use Lambda Version to point to new deployed Version

LambdaTest.js

@@ -5,5 +5,5 @@ exports.handler = function(event, context) {
     console.log('Who = ' + event.key1);
     console.log('is = ' + event.key2);
     console.log('awesome = ' + event.key3);
-    context.done(null, 'Hello World');  // SUCCESS with message
+    context.done(null, 'Hello World - DATE');  // SUCCESS with message
 };

deploy_to_lambda.sh

@@ -2,8 +2,27 @@
 
 set -e
 
-cd /deploy
+function lambda_invoke {
+  aws lambda invoke --function-name LambdaTest --payload "`cat data.json`" --qualifier PROD lambdaoutput.txt
+  cat lambdaoutput.txt
+  echo -e "\n"
+}
+
+echo "Output before deployment"
+lambda_invoke
+
+# Change Printed Date in LambdaTest to show the difference between the deployed functions
+sed -i.bu s/DATE/$RANDOM/ LambdaTest.js
+
+# Preparing and deploying Function to Lambda
 zip -r LambdaTest.zip LambdaTest.js
 aws lambda update-function-code --function-name LambdaTest --zip-file fileb://LambdaTest.zip
-aws lambda invoke --function-name LambdaTest --payload "`cat data.json`" lambdaoutput.txt
-cat lambdaoutput.txt
+
+# Publishing a new Version of the Lambda function
+version=`aws lambda publish-version --function-name LambdaTest | jq -r .Version`
+
+# Updating the PROD Lambda Alias so it points to the new function
+aws lambda update-alias --function-name LambdaTest --function-version $version --name PROD
+
+echo "Output after deployment"
+lambda_invoke