copy apply and diff commands from kubectl

cmd/kubectl/Makefile

@@ -0,0 +1,36 @@
+# Copyright 2019 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+.PHONY: generate license fix vet fmt test tidy
+
+GOBIN := $(shell go env GOPATH)/bin
+
+all: generate license fix vet fmt test lint tidy
+
+fix:
+	go fix ./...
+
+fmt:
+	go fmt ./...
+
+generate:
+	(which $(GOBIN)/mdtogo || go get sigs.k8s.io/kustomize/cmd/mdtogo)
+	GOBIN=$(GOBIN) go generate ./...
+
+license:
+	(which $(GOBIN)/addlicense || go get github.com/google/addlicense)
+	$(GOBIN)/addlicense  -y 2019 -c "The Kubernetes Authors." -f LICENSE_TEMPLATE .
+
+tidy:
+	go mod tidy
+
+lint:
+	(which $(GOBIN)/golangci-lint || go get github.com/golangci/golangci-lint/cmd/golangci-lint@v1.19.1)
+	$(GOBIN)/golangci-lint run ./...
+
+test:
+	go test -cover ./...
+
+vet:
+	go vet ./...
+