CloudFormation supports YAML templates out of the box: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/gettingstarted.templatebasics.html https:/

CloudFormation supports YAML templates out of the box: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/gettingstarted.templatebasics.html https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGui... It's way nicer than JSON, especially w.r.t. functions. It's also compatible, so you can load JSON templates into e.g. a Python script and serialize them to YAML. I did this to all our templates pretty much as soon as it came out. I have used cfndsl and loath it. If I need more complex variables than CloudFormation supports, I rather use a simple templating engine like Jinja2 or ERB than a Ruby-based DSL.