[cloudformation-include] Add support for YAML templates

[comcalvi]

Adding support for YAML templates, since cloudformation accepts both JSON and YAML.

Use Case

Cloudformation supports both YAML and JSON templates, so the CDK should as well.

Proposed Solution

I will be opening a PR to address this.

• 👋 I may be able to implement this feature request
• ⚠️ This feature might incur a breaking change

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This is a 🚀 Feature Request

[asterikx]

Just came across this tool https://github.com/awslabs/aws-cfn-template-flip for converting CloudFormation templates between JSON and YAML (seen in this comment here, credits to @rrrix). That might be helpful.

Btw, what's the motivation for this? Since the synthesized templates are "internal" to CDK, shouldn't you care too much about their format?

[skinny85]

Btw, what's the motivation for this? Since the synthesized templates are "internal" to CDK, shouldn't you care too much about their format?

This is for the cloudformation-includemodule - this adds support for ingesting a CloudFormation template in YAML format, in addition to JSON. So it's not changing anything in CDK internals, it's about accepting another format as input.

[asterikx]

Sorry, missed the module prefix in the title. Please ignore my comment ;-)