Makefile.gen.mk

##@ Code generation targets

## Location to install dependencies to
LOCALBIN ?= $(shell pwd)/bin
$(LOCALBIN):
	[ -d $@ ] || mkdir -p $@

CONTROLLER_GEN ?= $(LOCALBIN)/controller-gen

## Tool Versions
CONTROLLER_TOOLS_VERSION ?= v0.19.0

.PHONY: generate
generate: controller-gen code-generator tidy ## Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations.
	$(CONTROLLER_GEN) object:headerFile="/dev/null" paths="./..."
	./hack/update-codegen.sh $(LOCALBIN)
	go generate ./...

# Use same code-generator version as k8s.io/api
CODEGEN_VERSION := $(shell go list -m -f '{{.Version}}' k8s.io/api)
CODEGEN = $(LOCALBIN)/code-generator
CODEGEN_ROOT = $(shell go env GOMODCACHE)/k8s.io/code-generator@$(CODEGEN_VERSION)
.PHONY: code-generator
code-generator:
	@GOBIN=$(LOCALBIN) GO111MODULE=on go install k8s.io/code-generator/cmd/client-gen@$(CODEGEN_VERSION)
	cp -f $(CODEGEN_ROOT)/generate-groups.sh $(LOCALBIN)/
	cp -f $(CODEGEN_ROOT)/generate-internal-groups.sh $(LOCALBIN)/
	cp -f $(CODEGEN_ROOT)/kube_codegen.sh $(LOCALBIN)/

.PHONY: controller-gen
controller-gen: $(CONTROLLER_GEN) ## Download controller-gen locally if necessary.
$(CONTROLLER_GEN): $(LOCALBIN)
	$(call go-install-tool,$(CONTROLLER_GEN),sigs.k8s.io/controller-tools/cmd/controller-gen,$(CONTROLLER_TOOLS_VERSION))

# go-install-tool will 'go install' any package with custom target and name of binary, if it doesn't exist
# $1 - target path with name of binary
# $2 - package url which can be installed
# $3 - specific version of package
define go-install-tool
@[ -f "$(1)-$(3)" ] || { \
set -e; \
package=$(2)@$(3) ;\
echo "Downloading $${package}" ;\
rm -f $(1) || true ;\
GOBIN=$(LOCALBIN) go install $${package} ;\
mv $(1) $(1)-$(3) ;\
} ;\
ln -sf $(1)-$(3) $(1)
endef