Migrate some presubmit functionality to Makefile.

Makefile

@@ -1,13 +1,75 @@
-# Warning
+# This Makefile is (and must be) used by
+# travis/pre-commit.sh to qualify pull requests.
 #
-# This makefile is provided only as a convenience to run
-# the travis pre-commit script, which generates all the
-# code that needs to be generated, and runs all the tests.
+# That script generates all the code that needs
+# to be generated, and runs all the tests.
 #
-# This makefile won't be maintained until it replaces
-# (or is used by) the travis/pre-commit.sh script
+# Functionality in that script, expressed in bash, is
+# gradually being moved here.
 
+MYGOBIN := $(shell go env GOPATH)/bin
+
+.PHONY: all
 all:
 	./travis/pre-commit.sh
 
-.PHONY: all
+$(MYGOBIN)/golangci-lint:
+	cd api; go install github.com/golangci/golangci-lint/cmd/golangci-lint
+
+$(MYGOBIN)/mdrip:
+	cd api; go install github.com/monopole/mdrip
+
+# TODO: need a new release of the API, followed by a new pluginator.
+# pluginator v1.1.0 is too old for the code currently needed in the API.
+# Can release a new one at any time, just haven't done so.
+# When one has been released,
+#  - uncomment the pluginator line in './api/internal/tools/tools.go'
+#  - pin the version tag in './api/go.mod' to match the new release
+#  - change the following to 'cd api; go install sigs.k8s.io/kustomize/pluginator'
+$(MYGOBIN)/pluginator:
+	cd pluginator; go install .
+
+$(MYGOBIN)/stringer:
+	cd api; go install golang.org/x/tools/cmd/stringer
+
+# Specific version tags for these utilities are pinned in ./api/go.mod
+# which seems to be as good a place as any to do so.
+# That's the reason for all the occurances of 'cd api;' in the
+# dependencies; 'go install' uses the local 'go.mod' to get the version.
+install-tools: $(MYGOBIN)/golangci-lint \
+	$(MYGOBIN)/mdrip \
+	$(MYGOBIN)/pluginator \
+	$(MYGOBIN)/stringer
+
+.PHONY: lint
+lint: install-tools
+	cd api; $(MYGOBIN)/golangci-lint run ./...
+	cd kustomize; $(MYGOBIN)/golangci-lint run ./...
+	cd pluginator; $(MYGOBIN)/golangci-lint run ./...
+
+.PHONY: unit-tests-api
+unit-tests-api:
+	cd api; go test ./...
+
+.PHONY: unit-tests-kustomize
+unit-tests-kustomize:
+	cd kustomize; go test ./...
+
+.PHONY: unit-tests
+unit-tests: unit-tests-api unit-tests-kustomize
+
+# linux only.
+$(MYGOBIN)/kubeval:
+	d=$(shell mktemp -d); cd $$d; \
+	wget https://github.com/instrumenta/kubeval/releases/latest/download/kubeval-linux-amd64.tar.gz; \
+	tar xf kubeval-linux-amd64.tar.gz; \
+	mv kubeval $(MYGOBIN); \
+	rm -rf $$d
+
+# linux only.
+$(MYGOBIN)/helm:
+	d=$(shell mktemp -d); cd $$d; \
+	wget https://storage.googleapis.com/kubernetes-helm/helm-v2.13.1-linux-amd64.tar.gz; \
+	tar -xvzf helm-v2.13.1-linux-amd64.tar.gz; \
+	mv linux-amd64/helm $(MYGOBIN); \
+	rm -rf $$d