For CFNMain, the update command exits with 0 even if the update fails

[adanaja]

In execute_for_stack we do the following to update an existing stack:

if self.args.apply_changeset:
    ask = input("Apply change (y/N): ")
    if ask[0] in "Yy":
        stack.execute_change_set(
            changeset_name=changeset_name,
            wait=self.args.wait_stack_creation,
        )
return 0

execute_change_set is a function that logs the new stack status logging.info(f"Done (status: {self.wait()})") but doesn't indicate a failure, so the update command exits with 0 even if the stack has not been updated because of errors.

The update command should exit with an error code if the stack could not be updated