fix some shellcheck failures of test/images/image-util.sh

test/images/image-util.sh

@@ -21,7 +21,7 @@ set -o pipefail
 TASK=$1
 IMAGE=$2
 
-KUBE_ROOT="$(cd "$(dirname "${BASH_SOURCE}")/../.." && pwd -P)"
+KUBE_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd -P)"
 source "${KUBE_ROOT}/hack/lib/util.sh"
 
 # Mapping of go ARCH to actual architectures shipped part of multiarch/qemu-user-static project
@@ -29,7 +29,7 @@ declare -A QEMUARCHS=( ["amd64"]="x86_64" ["arm"]="arm" ["arm64"]="aarch64" ["pp
 
 # Returns list of all supported architectures from BASEIMAGE file
 listArchs() {
-  cut -d "=" -f 1 ${IMAGE}/BASEIMAGE
+  cut -d "=" -f 1 "${IMAGE}"/BASEIMAGE
 }
 
 # Returns baseimage need to used in Dockerfile for any given architecture
@@ -56,22 +56,22 @@ build() {
 
     # Create a temporary directory for every architecture and copy the image content
     # and build the image from temporary directory
-    mkdir -p ${KUBE_ROOT}/_tmp
-    temp_dir=$(mktemp -d ${KUBE_ROOT}/_tmp/test-images-build.XXXXXX)
+    mkdir -p "${KUBE_ROOT}"/_tmp
+    temp_dir=$(mktemp -d "${KUBE_ROOT}"/_tmp/test-images-build.XXXXXX)
     kube::util::trap_add "rm -rf ${temp_dir}" EXIT
 
-    cp -r ${IMAGE}/* ${temp_dir}
+    cp -r "${IMAGE}"/* "${temp_dir}"
     if [[ -f ${IMAGE}/Makefile ]]; then
       # make bin will take care of all the prerequisites needed
       # for building the docker image
-      make -C ${IMAGE} bin ARCH=${arch} TARGET=${temp_dir}
+      make -C "${IMAGE}" bin ARCH="${arch}" TARGET="${temp_dir}"
     fi
-    pushd ${temp_dir}
+    pushd "${temp_dir}"
     # image tag
     TAG=$(<VERSION)
 
     if [[ -f BASEIMAGE ]]; then
-      BASEIMAGE=$(getBaseImage ${arch})
+      BASEIMAGE=$(getBaseImage "${arch}")
       ${SED} -i "s|BASEIMAGE|${BASEIMAGE}|g" Dockerfile
       ${SED} -i "s|BASEARCH|${arch}|g" Dockerfile
     fi
@@ -89,14 +89,14 @@ build() {
           sudo=sudo
         fi
         "${sudo}" "${KUBE_ROOT}/third_party/multiarch/qemu-user-static/register/register.sh" --reset
-        curl -sSL https://github.com/multiarch/qemu-user-static/releases/download/${QEMUVERSION}/x86_64_qemu-${QEMUARCHS[$arch]}-static.tar.gz | tar -xz -C ${temp_dir}
+        curl -sSL https://github.com/multiarch/qemu-user-static/releases/download/"${QEMUVERSION}"/x86_64_qemu-"${QEMUARCHS[$arch]}"-static.tar.gz | tar -xz -C "${temp_dir}"
         # Ensure we don't get surprised by umask settings
         chmod 0755 "${temp_dir}/qemu-${QEMUARCHS[$arch]}-static"
         ${SED} -i "s/CROSS_BUILD_//g" Dockerfile
       fi
     fi
 
-    docker build --pull -t ${REGISTRY}/${IMAGE}-${arch}:${TAG} .
+    docker build --pull -t "${REGISTRY}/${IMAGE}-${arch}:${TAG}" .
 
     popd
   done
@@ -115,14 +115,14 @@ docker_version_check() {
 # This function will push the docker images
 push() {
   docker_version_check
-  TAG=$(<${IMAGE}/VERSION)
+  TAG=$(<"${IMAGE}"/VERSION)
   if [[ -f ${IMAGE}/BASEIMAGE ]]; then
     archs=$(listArchs)
   else
     archs=${!QEMUARCHS[@]}
   fi
   for arch in ${archs}; do
-    docker push ${REGISTRY}/${IMAGE}-${arch}:${TAG}
+    docker push "${REGISTRY}/${IMAGE}-${arch}:${TAG}"
   done
 
   kube::util::ensure-gnu-sed
@@ -130,26 +130,26 @@ push() {
   # The manifest command is still experimental as of Docker 18.09.2
   export DOCKER_CLI_EXPERIMENTAL="enabled"
   # Make archs list into image manifest. Eg: 'amd64 ppc64le' to '${REGISTRY}/${IMAGE}-amd64:${TAG} ${REGISTRY}/${IMAGE}-ppc64le:${TAG}'
-  manifest=$(echo $archs | ${SED} -e "s~[^ ]*~$REGISTRY\/$IMAGE\-&:$TAG~g")
-  docker manifest create --amend ${REGISTRY}/${IMAGE}:${TAG} ${manifest}
+  manifest=$(echo "$archs" | ${SED} -e "s~[^ ]*~$REGISTRY\/$IMAGE\-&:$TAG~g")
+  docker manifest create --amend "${REGISTRY}/${IMAGE}:${TAG}" "${manifest}"
   for arch in ${archs}; do
-    docker manifest annotate --arch ${arch} ${REGISTRY}/${IMAGE}:${TAG} ${REGISTRY}/${IMAGE}-${arch}:${TAG}
+    docker manifest annotate --arch "${arch}" "${REGISTRY}/${IMAGE}:${TAG}" "${REGISTRY}/${IMAGE}-${arch}:${TAG}"
   done
-  docker manifest push --purge ${REGISTRY}/${IMAGE}:${TAG}
+  docker manifest push --purge "${REGISTRY}/${IMAGE}:${TAG}"
 }
 
 # This function is for building the go code
 bin() {
   for SRC in $@;
   do
-  docker run --rm -it -v ${TARGET}:${TARGET}:Z -v ${KUBE_ROOT}:/go/src/k8s.io/kubernetes:Z \
-        golang:${GOLANG_VERSION} \
+  docker run --rm -it -v "${TARGET}:${TARGET}:Z" -v "${KUBE_ROOT}":/go/src/k8s.io/kubernetes:Z \
+        golang:"${GOLANG_VERSION}" \
         /bin/bash -c "\
                 cd /go/src/k8s.io/kubernetes/test/images/${SRC_DIR} && \
-                CGO_ENABLED=0 GOARM=${GOARM} GOARCH=${ARCH} go build -a -installsuffix cgo --ldflags '-w' -o ${TARGET}/${SRC} ./$(dirname ${SRC})"
+                CGO_ENABLED=0 GOARM=${GOARM} GOARCH=${ARCH} go build -a -installsuffix cgo --ldflags '-w' -o ${TARGET}/${SRC} ./$(dirname "${SRC}")"
   done
 }
 
 shift
 
-eval ${TASK} "$@"
+eval "${TASK}" "$@"