fix makefile

Signed-off-by: Zbynek Roubalik <[email protected]>

Makefile

@@ -148,9 +148,9 @@ clientset-verify: ## Verify that generated client-go clientset, listers and info
 clientset-generate: ## Generate client-go clientset, listers and informers.
 	./hack/update-codegen.sh
 
-proto-gen: ## Generate Liiklus, ExternalScaler and MetricsService proto
-	protoc -I vendor --proto_path=hack LiiklusService.proto --go_out=pkg/scalers/liiklus --go-grpc_out=pkg/scalers/liiklus
-	protoc -I vendor --proto_path=pkg/scalers/externalscaler externalscaler.proto --go_out=pkg/scalers/externalscaler --go-grpc_out=pkg/scalers/externalscaler
+proto-gen: protoc-gen ## Generate Liiklus, ExternalScaler and MetricsService proto
+	GOBIN=$(LOCALBIN) protoc -I vendor --proto_path=hack LiiklusService.proto --go_out=pkg/scalers/liiklus --go-grpc_out=pkg/scalers/liiklus
+	GOBIN=$(LOCALBIN) protoc -I vendor --proto_path=pkg/scalers/externalscaler externalscaler.proto --go_out=pkg/scalers/externalscaler --go-grpc_out=pkg/scalers/externalscaler
 
 .PHONY: mockgen-gen
 mockgen-gen: mockgen pkg/mock/mock_scaling/mock_interface.go pkg/mock/mock_scaler/mock_scaler.go pkg/mock/mock_scale/mock_interfaces.go pkg/mock/mock_client/mock_interfaces.go pkg/scalers/liiklus/mocks/mock_liiklus.go
@@ -264,6 +264,8 @@ KUSTOMIZE ?= $(LOCALBIN)/kustomize
 CONTROLLER_GEN ?= $(LOCALBIN)/controller-gen
 ENVTEST ?= $(LOCALBIN)/setup-envtest
 MOCKGEN ?= $(LOCALBIN)/mockgen
+PROTOCGEN ?= $(LOCALBIN)/protoc-gen-go
+PROTOCGEN_GRPC ?= $(LOCALBIN)/protoc-gen-go-grpc
 
 .PHONY: controller-gen
 controller-gen: $(CONTROLLER_GEN) ## Install controller-gen from vendor dir if necessary.
@@ -285,6 +287,13 @@ mockgen: $(MOCKGEN) ## Install mockgen from vendor dir if necessary.
 $(MOCKGEN): $(LOCALBIN)
 	test -s $(LOCALBIN)/mockgen || GOBIN=$(LOCALBIN) go install github.com/golang/mock/mockgen
 
+.PHONY: protoc-gen
+protoc-gen: $(PROTOCGEN) $(PROTOCGEN_GRPC) ## Install protoc-gen from vendor dir if necessary.
+$(PROTOCGEN): $(LOCALBIN)
+	GOBIN=$(LOCALBIN) go install google.golang.org/protobuf/cmd/protoc-gen-go
+$(PROTOCGEN_GRPC): $(LOCALBIN)
+	GOBIN=$(LOCALBIN) go install google.golang.org/grpc/cmd/protoc-gen-go-grpc
+
 
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 # General                                        #