Introducing go modules for vendor dependency tracking.

Result of below set of commands:
  go mod init
  go get k8s.io/[email protected]
  go get k8s.io/<k8s-family-projects>@kubernetes-1.16.2
  go mod tidy
  go mod vendor

The way package paths returned by v1.13 'go list' is different from previous
go versions. Made changes to rest_runtime target according to this.

TODO: We can drop Gopkg.lock file, but 'test_vendor_bom' make target uses this
file to retrieve the package list to validate vendor tree. One should replace
this check with go module equivalent.

Makefile

@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+GO=GOOS=linux GO111MODULE=on GOFLAGS=-mod=vendor go
 IMPORT_PATH=github.com/intel/pmem-csi
 CMDS=pmem-csi-driver pmem-vgm pmem-ns-init
 TEST_CMDS=$(addsuffix -test,$(CMDS))
@@ -58,21 +59,21 @@ all: build
 # Build all binaries, including tests.
 # Must use the workaround from https://github.com/golang/go/issues/15513
 build: $(CMDS) $(TEST_CMDS)
-	go test -run none ./pkg/... ./test/e2e
+	$(GO) test -run none ./pkg/... ./test/e2e
 
 # "make test" runs a variety of fast tests, including building all source code.
 # More tests are added elsewhere in this Makefile and test/test.make.
 test: build
 
 # Build production binaries.
 $(CMDS):
-	GOOS=linux go build -ldflags '-X github.com/intel/pmem-csi/pkg/[email protected]=${VERSION}' -a -o ${OUTPUT_DIR}/$@ ./cmd/$@
+	$(GO) build -ldflags '-X github.com/intel/pmem-csi/pkg/[email protected]=${VERSION}' -a -o ${OUTPUT_DIR}/$@ ./cmd/$@
 
 # Build a test binary that can be used instead of the normal one with
 # additional "-run" parameters. In contrast to the normal it then also
 # supports -test.coverprofile.
 $(TEST_CMDS): %-test:
-	GOOS=linux go test --cover -covermode=atomic -c -coverpkg=./pkg/... -ldflags '-X github.com/intel/pmem-csi/pkg/$*.version=${VERSION}' -o ${OUTPUT_DIR}/$@ ./cmd/$*
+	$(GO) test --cover -covermode=atomic -c -coverpkg=./pkg/... -ldflags '-X github.com/intel/pmem-csi/pkg/$*.version=${VERSION}' -o ${OUTPUT_DIR}/$@ ./cmd/$*
 
 # The default is to refresh the base image once a day when building repeatedly.
 # This is achieved by passing a fake variable that changes its value once per day.
@@ -111,7 +112,7 @@ print-image-version:
 	@ echo "$(IMAGE_VERSION)"
 
 clean:
-	go clean -r -x
+	$(GO) clean -r -x ./cmd/...
 	-rm -rf $(OUTPUT_DIR)
 
 .PHONY: all build test clean $(CMDS) $(TEST_CMDS)

go.mod

@@ -0,0 +1,75 @@
+module github.com/intel/pmem-csi
+
+go 1.13
+
+require (
+	github.com/Microsoft/go-winio v0.4.14 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/container-storage-interface/spec v1.2.0
+	github.com/docker/go-units v0.4.0
+	github.com/docker/spdystream v0.0.0-20181023171402-6480d4af844c // indirect
+	github.com/evanphx/json-patch v4.5.0+incompatible // indirect
+	github.com/gogo/protobuf v1.3.1 // indirect
+	github.com/golang/groupcache v0.0.0-20191027212112-611e8accdfc9 // indirect
+	github.com/golang/protobuf v1.3.2
+	github.com/google/go-cmp v0.3.1 // indirect
+	github.com/google/uuid v1.1.1
+	github.com/googleapis/gnostic v0.3.1 // indirect
+	github.com/hashicorp/golang-lru v0.5.3 // indirect
+	github.com/imdario/mergo v0.3.8 // indirect
+	github.com/json-iterator/go v1.1.8-0.20191012130704-03217c3e9766 // indirect
+	github.com/kubernetes-csi/csi-lib-utils v0.6.1
+	github.com/kubernetes-csi/csi-test v1.1.2-0.20191016154743-6931aedb3df0
+	github.com/onsi/ginkgo v1.10.2
+	github.com/onsi/gomega v1.7.0
+	github.com/pkg/errors v0.8.1
+	github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 // indirect
+	github.com/prometheus/common v0.4.1 // indirect
+	github.com/prometheus/procfs v0.0.5 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/stretchr/testify v1.4.0 // indirect
+	go.uber.org/atomic v1.4.0 // indirect
+	go.uber.org/multierr v1.2.0 // indirect
+	go.uber.org/zap v1.11.0 // indirect
+	golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 // indirect
+	golang.org/x/net v0.0.0-20191027233614-53de4c7853b5
+	golang.org/x/sys v0.0.0-20191105231009-c1f44814a5cd // indirect
+	golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect
+	google.golang.org/appengine v1.6.5 // indirect
+	google.golang.org/genproto v0.0.0-20191009194640-548a555dbc03 // indirect
+	google.golang.org/grpc v1.24.0
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/square/go-jose.v2 v2.4.0 // indirect
+	k8s.io/api v0.0.0
+	k8s.io/apimachinery v0.0.0
+	k8s.io/client-go v0.0.0
+	k8s.io/component-base v0.0.0
+	k8s.io/klog v1.0.0
+	k8s.io/kube-openapi v0.0.0-20190918143330-0270cf2f1c1d // indirect
+	k8s.io/kubernetes v1.17.0-alpha.0.0.20191109043140-c3f2a6524ed8
+	k8s.io/utils v0.0.0-20190801114015-581e00157fb1
+)
+
+replace (
+	k8s.io/api => k8s.io/api v0.0.0-20191016110408-35e52d86657a
+	k8s.io/apiextensions-apiserver => k8s.io/apiextensions-apiserver v0.0.0-20191016113550-5357c4baaf65
+	k8s.io/apimachinery => k8s.io/apimachinery v0.0.0-20191004115801-a2eda9f80ab8
+	k8s.io/apiserver => k8s.io/apiserver v0.0.0-20191016112112-5190913f932d
+	k8s.io/cli-runtime => k8s.io/cli-runtime v0.0.0-20191016114015-74ad18325ed5
+	k8s.io/client-go => k8s.io/client-go v0.0.0-20191016111102-bec269661e48
+	k8s.io/cloud-provider => k8s.io/cloud-provider v0.0.0-20191016115326-20453efc2458
+	k8s.io/cluster-bootstrap => k8s.io/cluster-bootstrap v0.0.0-20191016115129-c07a134afb42
+	k8s.io/code-generator => k8s.io/code-generator v0.0.0-20191004115455-8e001e5d1894
+	k8s.io/component-base => k8s.io/component-base v0.0.0-20191016111319-039242c015a9
+	k8s.io/cri-api => k8s.io/cri-api v0.0.0-20190828162817-608eb1dad4ac
+	k8s.io/csi-translation-lib => k8s.io/csi-translation-lib v0.0.0-20191016115521-756ffa5af0bd
+	k8s.io/kube-aggregator => k8s.io/kube-aggregator v0.0.0-20191016112429-9587704a8ad4
+	k8s.io/kube-controller-manager => k8s.io/kube-controller-manager v0.0.0-20191016114939-2b2b218dc1df
+	k8s.io/kube-proxy => k8s.io/kube-proxy v0.0.0-20191016114407-2e83b6f20229
+	k8s.io/kube-scheduler => k8s.io/kube-scheduler v0.0.0-20191016114748-65049c67a58b
+	k8s.io/kubectl => k8s.io/kubectl v0.0.0-20191016120415-2ed914427d51
+	k8s.io/kubelet => k8s.io/kubelet v0.0.0-20191016114556-7841ed97f1b2
+	k8s.io/legacy-cloud-providers => k8s.io/legacy-cloud-providers v0.0.0-20191016115753-cf0698c3a16b
+	k8s.io/metrics => k8s.io/metrics v0.0.0-20191016113814-3b1a734dba6e
+	k8s.io/sample-apiserver => k8s.io/sample-apiserver v0.0.0-20191016112829-06bb3c9d77c9
+)