Schema is a seed of a CLI tool that a downstream can use to use reflection and go file inspection to generate a base version of OpenAPI for a CRD. The resulting schema will be used by Kubernetes to provide results from kubectl explain <type> calls, and type validation.

Knative does not currently support full CRD generation via tools like controller-gen, this tool is to be used to support managing CRD manifests manually.

Register the type you wish to expose in the CLI,

registry.Register(&example.LoremIpsum{})

Run the schema dump command for the you wish to have schema for,

cd ./schema
go run ./ dump LoremIpsum | pbcopy

Paste this inside the CRD for LoremIpsum,

...
      schema:
        openAPIV3Schema:
          <**paste**>
      additionalPrinterColumns:
...

Start with example.go, copy this into the downstream and modify which kinds are registered via registry.Register. You can register more than one kind at a time. (TODO: support versions in the CLI.)