Add build rule for Windows container

Add build rule for windows container. Here we try to enable buildx for
buiding windows container image on a linux VM

Author: jingxu97

Makefile

@@ -19,6 +19,7 @@ STAGINGIMAGE=${GCE_PD_CSI_STAGING_IMAGE}
 STAGINGVERSION=${GCE_PD_CSI_STAGING_VERSION}
 DRIVERBINARY=gce-pd-csi-driver
 DRIVERWINDOWSBINARY=${DRIVERBINARY}.exe
+REV=$(shell git describe --long --tags --match='v*' --dirty 2>/dev/null || git rev-list -n1 HEAD)
 
 all: gce-pd-driver
 gce-pd-driver:
@@ -28,12 +29,9 @@ ifndef GCE_PD_CSI_STAGING_VERSION
 endif
 	go build -ldflags "-X main.vendorVersion=${STAGINGVERSION}" -o bin/${DRIVERBINARY} ./cmd/
 
-build-windows:
+gce-pd-driver-windows:
 	mkdir -p bin
-ifndef GCE_PD_CSI_STAGING_VERSION
-	$(error "Must set environment variable GCE_PD_CSI_STAGING_VERSION to staging version")
-endif
-	GOOS=windows go build -ldflags "-X main.vendorVersion=${STAGINGVERSION}" -o bin/${DRIVERWINDOWSBINARY} ./cmd/
+	GOOS=windows go build -ldflags -X=main.vendorVersion=$(REV) -o bin/${DRIVERWINDOWSBINARY} ./cmd/
 
 build-container:
 ifndef GCE_PD_CSI_STAGING_IMAGE
@@ -44,6 +42,16 @@ ifndef GCE_PD_CSI_STAGING_VERSION
 endif
 	docker build --build-arg TAG=$(STAGINGVERSION) -t $(STAGINGIMAGE):$(STAGINGVERSION) .
 
+build-push-windows-container:
+ifndef GCE_PD_CSI_STAGING_IMAGE
+	$(error "Must set enviroment variable GCE_PD_CSI_STAGING_IMAGE to staging image repository")
+endif
+ifndef GCE_PD_CSI_STAGING_VERSION
+	$(error "Must set enviroment variable GCE_PD_CSI_STAGING_VERSION to staging version")
+endif
+	@sh init-buildx.sh; \
+	DOCKER_CLI_EXPERIMENTAL=enabled docker buildx build -f Dockerfile.Windows --platform=windows -t $(STAGINGIMAGE):$(STAGINGVERSION) --push .
+
 push-container: build-container
 	gcloud docker -- push $(STAGINGIMAGE):$(STAGINGVERSION)
 
@@ -52,3 +60,4 @@ test-sanity: gce-pd-driver
 
 test-k8s-integration:
 	go build -o bin/k8s-integration-test ./test/k8s-integration
+

init-buildx.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+#!/usr/bin/env bash
+# Copyright 2020 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.
+
+set -o errexit -o nounset -o pipefail
+
+export DOCKER_CLI_EXPERIMENTAL=enabled
+
+# Ensure we use a builder that can leverage it (the default on linux will not)
+docker buildx rm windows-builder || true
+docker buildx create --use --name=windows-builder