fix shellcheck in k8s.io/metrics

Author: danielqsj

hack/.shellcheck_failures

@@ -155,8 +155,6 @@
 ./pkg/kubectl/cmd/edit/testdata/record_testcase.sh
 ./pkg/util/verify-util-pkg.sh
 ./plugin/pkg/admission/imagepolicy/gencerts.sh
-./staging/src/k8s.io/metrics/hack/update-codegen.sh
-./staging/src/k8s.io/metrics/hack/verify-codegen.sh
 ./test/cmd/apply.sh
 ./test/cmd/apps.sh
 ./test/cmd/authorization.sh

staging/src/k8s.io/metrics/hack/update-codegen.sh

@@ -18,8 +18,8 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-SCRIPT_ROOT=$(dirname ${BASH_SOURCE})/..
-CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${SCRIPT_ROOT}; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
+SCRIPT_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+CODEGEN_PKG=${CODEGEN_PKG:-$(cd "${SCRIPT_ROOT}"; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
 
 # generate the code with:
 # --output-base    because this script should also be able to run inside the vendor dir of
@@ -28,13 +28,13 @@ CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${SCRIPT_ROOT}; ls -d -1 ./vendor/k8s.io/code-ge
 #
 # we skip informers and listers for metrics, because we don't quite support the requisite operations yet
 # we skip generating the internal clientset as it's not really needed
-${CODEGEN_PKG}/generate-internal-groups.sh deepcopy,conversion \
+"${CODEGEN_PKG}/generate-internal-groups.sh" deepcopy,conversion \
   k8s.io/metrics/pkg/client k8s.io/metrics/pkg/apis k8s.io/metrics/pkg/apis \
   "metrics:v1alpha1,v1beta1 custom_metrics:v1beta1 external_metrics:v1beta1" \
-  --output-base "$(dirname ${BASH_SOURCE})/../../.." \
-  --go-header-file ${SCRIPT_ROOT}/hack/boilerplate.go.txt
-${CODEGEN_PKG}/generate-groups.sh client \
+  --output-base "$(dirname "${BASH_SOURCE[0]}")/../../.." \
+  --go-header-file "${SCRIPT_ROOT}/hack/boilerplate.go.txt"
+"${CODEGEN_PKG}/generate-groups.sh" client \
   k8s.io/metrics/pkg/client k8s.io/metrics/pkg/apis \
   "metrics:v1alpha1,v1beta1" \
-  --output-base "$(dirname ${BASH_SOURCE})/../../.." \
-  --go-header-file ${SCRIPT_ROOT}/hack/boilerplate.go.txt
+  --output-base "$(dirname "${BASH_SOURCE[0]}")/../../.." \
+  --go-header-file "${SCRIPT_ROOT}/hack/boilerplate.go.txt"

staging/src/k8s.io/metrics/hack/verify-codegen.sh

@@ -18,8 +18,7 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-SCRIPT_ROOT=$(dirname "${BASH_SOURCE}")/..
-SCRIPT_BASE=${SCRIPT_ROOT}/../..
+SCRIPT_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
 
 DIFFROOT="${SCRIPT_ROOT}/pkg"
 TMP_DIFFROOT="${SCRIPT_ROOT}/_tmp/pkg"