Unclear on k8s.io/code-generator utils vs controller-gen tool #661
Description
I am a newcomer to the ecosystem and I cannot tell when to use
https://github.com/kubernetes/code-generator/blob/master/generate-groups.sh,
https://github.com/kubernetes/code-generator/blob/master/hack/update-codegen.sh or
https://github.com/kubernetes-sigs/controller-tools/tree/master/cmd/controller-gen
For example controller-gen can do deepcopy generation, and so can https://github.com/kubernetes/code-generator/tree/master/cmd/deepcopy-gen.
Similarly, controller-gen can do OpenAPI v3 schema generation, and so can https://github.com/kubernetes/code-generator/blob/master/cmd/openapi-gen/main.go
Is controller-gen a one-stop shop?
I hope this piece of feedback is somewhat useful.