Utilize go generate

Use 'go generate' for auto-generating code. Drop the old 'mock' and
'apigen' makefile targets. Those are replaced with a single
  make generate

which (re-)generates everything.

Makefile

@@ -98,15 +98,10 @@ templates:
 	    -e "}; /$$end/p; d }" -i deployment/helm/node-feature-discovery/values.yaml
 	@rm nfd-worker.conf.tmp
 
-mock:
+generate:
-	mockery --name=LabelSource --dir=source --inpkg --note="Re-generate by running 'make mock'"
+	go mod vendor
-	mockery --name=APIHelpers --dir=pkg/apihelper --inpkg --note="Re-generate by running 'make mock'"
+	go generate ./cmd/... ./pkg/... ./source/...
-	mockery --name=LabelerClient --dir=pkg/labeler --inpkg --note="Re-generate by running 'make mock'"
+	rm -rf vendor/
-	mockery --name=NodeTopologyClient --dir=pkg/topologyupdater --inpkg --note="Re-generate by running 'make mock'"
-
-apigen:
-	protoc --go_opt=paths=source_relative --go_out=plugins=grpc:.  pkg/labeler/labeler.proto
-	protoc --go_opt=paths=source_relative  --go_out=plugins=grpc:. pkg/topologyupdater/topology-updater.proto
 
 gofmt:
 	@$(GO_FMT) -w -l $$(find . -name '*.go')

pkg/apihelper/apihelpers.go

@@ -16,6 +16,8 @@ limitations under the License.
 
 package apihelper
 
+//go:generate mockery --name=APIHelpers --inpkg
+
 import (
 	topologyclientset "github.com/k8stopologyawareschedwg/noderesourcetopology-api/pkg/generated/clientset/versioned"
 	api "k8s.io/api/core/v1"

pkg/labeler/doc.go

@@ -0,0 +1,20 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package labeler
+
+//go:generate protoc --go_opt=paths=source_relative --go_out=plugins=grpc:.  labeler.proto
+//go:generate mockery --name=LabelerClient --inpkg

pkg/topologyupdater/doc.go

@@ -0,0 +1,20 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package topologyupdater
+
+//go:generate protoc --go_opt=paths=source_relative --go_out=plugins=grpc:. -I . -I ../../vendor/ topology-updater.proto
+//go:generate mockery --name=NodeTopologyClient --inpkg

source/source.go

@@ -16,6 +16,8 @@ limitations under the License.
 
 package source
 
+//go:generate mockery --name=LabelSource --inpkg
+
 import (
 	"fmt"
 )