Generate clients

[vaikas]

This closes #

Note to reviewers: remember to look at the commits in this PR and consider if they can be squashed

Summary Of Changes

Add codegen generated clients so that these can be used from things like github.com/knative-sandbox/eventing-rabbitmq. While it seems like a lot of new code, it's all code generated. Also had to fix couple of tags / add methods in the api/v1alpha2 so the code-gen behaves properly.

Start of the usage can be seen here (by no means complete, just starting that work over there):

knative-extensions/eventing-rabbitmq#267

Additional Context

[MirahImage]

Does the script hack/update-codegen.sh need to be added to the make generate target?

[n3wscott]

Does the script hack/update-codegen.sh need to be added to the make generate target?

Does kubebuilder now encourage a Makefile? This has been seen as an anti-pattern in many projects, including Knative.

[vaikas]

@MirahImage Thanks, PTAL. Added update-codegen.sh to make generate, and re-ran it to make sure it worked.

vaikas@villes-mbp messaging-topology-operator % make generate
go mod download
grep _ tools/tools.go | awk -F '"' '{print $2}' | xargs -t go install
go install github.com/elastic/crd-ref-docs github.com/onsi/ginkgo/ginkgo sigs.k8s.io/controller-tools/cmd/controller-gen sigs.k8s.io/kustomize/kustomize/v3
crd-ref-docs \
		--source-path ./api/v1alpha2 \
		--config ./docs/api/autogen/config.yaml \
		--templates-dir ./docs/api/autogen/templates \
		--output-path ./docs/api/rabbitmq.com.ref.asciidoc \
		--max-depth 30
2021-03-30T08:33:04.609-0700	INFO	crd-ref-docs	Loading configuration	{"path": "./docs/api/autogen/config.yaml"}
2021-03-30T08:33:04.609-0700	INFO	crd-ref-docs	Processing source directory	{"directory": "./api/v1alpha2", "depth": 30}
2021-03-30T08:33:05.149-0700	INFO	crd-ref-docs	Rendering output	{"path": "./docs/api/rabbitmq.com.ref.asciidoc"}
2021-03-30T08:33:05.153-0700	INFO	crd-ref-docs	CRD reference documentation generated
2021-03-30T08:33:05.153-0700	INFO	crd-ref-docs	Execution time: 543.754625ms
controller-gen object:headerFile="hack/NOTICE.go.txt" paths="./..."
./hack/update-codegen.sh
Generating clientset for rabbitmq.com:v1alpha2 at github.com/rabbitmq/messaging-topology-operator/pkg/generated/clientset
Generating listers for rabbitmq.com:v1alpha2 at github.com/rabbitmq/messaging-topology-operator/pkg/generated/listers
Generating informers for rabbitmq.com:v1alpha2 at github.com/rabbitmq/messaging-topology-operator/pkg/generated/informers