cloudformation delete-stack to return error when Stack does not exist

[mssokal]

Is your feature request related to a problem? Please describe.
At the moment when running aws cloudformation delete-stack --stack-name xxxx returns no screen output and only returns exit code = 0 if the stack does not exist

Describe the solution you'd like
The CLI should return error and return code different than 0 if stack does not exist

Describe alternatives you've considered
At the moment I need to confirm the existence of the stack with describe-stacks before sending the delete-stack

Additional context

[kdaily]

Hi @mssokal,

Unfortunately there isn't anything that we can do here. The CloudFormation service is returning a 200 HTTP response indicating that the request was successful. We don't modify the output from the request after that, and since it was successful the CLI returns an exit code of 0 as well. This was previously requested with no change being made from CloudFormation, as it would likely be a breaking change for many other customers who expect this to be a no-op.

#3569

Here's an example you can see in the debug logs of the response:

2021-07-29 15:15:35,930 - MainThread - urllib3.connectionpool - DEBUG - Starting new HTTPS connection (1): cloudformation.us-west-2.amazonaws.com:443
2021-07-29 15:15:36,068 - MainThread - urllib3.connectionpool - DEBUG - https://cloudformation.us-west-2.amazonaws.com:443 "POST / HTTP/1.1" 200 212
2021-07-29 15:15:36,069 - MainThread - botocore.parsers - DEBUG - Response headers: {'x-amzn-RequestId': '49334796-f9c7-4640-bbcc-4160b0cbd3e6', 'Content-Type': 'text/xml', 'Content-Length': '212', 'Date': 'Thu, 29 Jul 2021 22:15:35 GMT'}
2021-07-29 15:15:36,069 - MainThread - botocore.parsers - DEBUG - Response body:
b'<DeleteStackResponse xmlns="http://cloudformation.amazonaws.com/doc/2010-05-15/">\n  <ResponseMetadata>\n    <RequestId>49334796-f9c7-4640-bbcc-4160b0cbd3e6</RequestId>\n  </ResponseMetadata>\n</DeleteStackResponse>\n'
2021-07-29 15:15:36,070 - MainThread - botocore.hooks - DEBUG - Event needs-retry.cloudformation.DeleteStack: calling handler <botocore.retryhandler.RetryHandler object at 0x10dfc1c10>
2021-07-29 15:15:36,070 - MainThread - botocore.retryhandler - DEBUG - No retry needed.
2021-07-29 15:15:36,070 - MainThread - awscli.formatter - DEBUG - RequestId: 49334796-f9c7-4640-bbcc-4160b0cbd3e6

The documentation indicates you should use describe-stacks to get the status, including if it has been deleted.

https://docs.aws.amazon.com/cli/latest/reference/cloudformation/describe-stacks.html

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