cfn.getTemplate may return YAML instead of JSON

[rreusser]

It appears that cfn.getTemplate may return JSON or YAML, but L126 in lookup.js presumes that it is necessarily JSON. I am trying to deploy a particular stack, but the content is YAML and so it throws an error when parsed as JSON. I'm not sure what dictates which the content is, or if there's a way to determine which it is, except to try one and then try the other if that fails.

cfn-config/lib/lookup.js

Line 126 in 2c6b4b0

callback(null, JSON.parse(data.TemplateBody));

See: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/template-anatomy.html

[rreusser]

Oh, this is addressed by #184. Perhaps the real issue is that even though YAML should correctly be forbidden, somehow YAML made its way into a template in the first place and now cannot directly be updated.