scripts/build-docker: build both gcr.io and quay.io images

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

scripts/build-docker

@@ -10,21 +10,20 @@ fi
 VERSION=${1}
 ARCH=$(go env GOARCH)
 DOCKERFILE="Dockerfile-release"
-: ${TAG:="quay.io/coreos/etcd"}
 
-if [ -z ${BINARYDIR} ]; then
-	RELEASE="etcd-${1}"-`go env GOOS`-`go env GOARCH`
+if [ -z "${BINARYDIR}" ]; then
+	RELEASE="etcd-${1}"-$(go env GOOS)-$(go env GOARCH)
 	BINARYDIR="${RELEASE}"
 	TARFILE="${RELEASE}.tar.gz"
 	TARURL="https://github.com/coreos/etcd/releases/download/${1}/${TARFILE}"
-	if ! curl -f -L -o ${TARFILE} ${TARURL} ; then
+	if ! curl -f -L -o "${TARFILE}" "${TARURL}" ; then
 		echo "Failed to download ${TARURL}."
 		exit 1
 	fi
-	tar -zvxf ${TARFILE}
+	tar -zvxf "${TARFILE}"
 fi
 
-if [ ${ARCH} != "amd64" ]; then
+if [ "${ARCH}" != "amd64" ]; then
 	DOCKERFILE+=".${ARCH}"
 	VERSION+="-${ARCH}"
 fi
@@ -34,10 +33,15 @@ BUILDDIR=${BUILDDIR:-.}
 
 IMAGEDIR=${BUILDDIR}/image-docker
 
-mkdir -p ${IMAGEDIR}/var/etcd
-mkdir -p ${IMAGEDIR}/var/lib/etcd
-cp ${BINARYDIR}/etcd ${BINARYDIR}/etcdctl ${IMAGEDIR}
+mkdir -p "${IMAGEDIR}"/var/etcd
+mkdir -p "${IMAGEDIR}"/var/lib/etcd
+cp "${BINARYDIR}"/etcd "${BINARYDIR}"/etcdctl "${IMAGEDIR}"
 
-cat ./${DOCKERFILE} > ${IMAGEDIR}/Dockerfile
+cat ./"${DOCKERFILE}" > "${IMAGEDIR}"/Dockerfile
 
-docker build -t ${TAG}:${VERSION} ${IMAGEDIR}
+if [ -z "$TAG" ]; then
+    docker build -t "gcr.io/etcd-development/etcd:${VERSION}" "${IMAGEDIR}"
+    docker build -t "quay.io/coreos/etcd:${VERSION}" "${IMAGEDIR}"
+else
+    docker build -t "${TAG}:${VERSION}" "${IMAGEDIR}"
+fi