Support download of single CRD manifest for each project / version, for import into tools like cdk8s

[prasek]

See related https://github.com/crossplane/crossplane/issues/1961

What problem are you facing?

Tool like cdk8s can import CRDs for a given release by pulling all CRD definitions from a single file:

• cdk8s import https://github.com/knative/serving/releases/download/v0.19.0/serving-crds.yaml
  • imports all CRDs defined in the serving-crds.yaml from the release assets: https://github.com/knative/serving/releases
• cdk8s import k8s@1.15.0 (src)
  • pulls from https://github.com/instrumenta/kubernetes-json-schema
  • is generated from the k8s swagger.json (src)
• using cdk8s.yaml
  • https://github.com/awslabs/cdk8s/blob/master/examples/typescript/crd/cdk8s.yaml
  • list of imports

To get the Crossplane CRDs you have to find and import each CRD:

• Crossplane core:
  • https://github.com/crossplane/crossplane/tree/v0.14.0/cluster/charts/crossplane/crds
  • https://github.com/crossplane/crossplane/tree/v0.14.0/docs/api-docs/crds
• Crossplane provider-aws: https://github.com/crossplane/provider-aws/tree/v0.14.0/package/crds

Also available CRDs can vary from release to release, so bumping versions in your cdk8s.yaml imports you have to:

• figure out which CRDs were added / removed, update the list
• update the version in each CRD url you want to import

What could we do to help?

Support download of single CRD manifest for each project / version, so cdk8s can import all available types using a single import statement.