k8s.io/metrics: use standard code-gen scripts

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

@@ -18,25 +18,23 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-SCRIPT_ROOT=$(dirname "${BASH_SOURCE}")/..
-SCRIPT_BASE=${SCRIPT_ROOT}/../..
-CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${SCRIPT_ROOT}; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo k8s.io/code-generator)}
-
-# Register function to be called on EXIT to remove generated binary.
-function cleanup {
-  rm -f "${CLIENTGEN:-}"
-}
-trap cleanup EXIT
-
-echo "Building client-gen"
-CLIENTGEN="${PWD}/client-gen"
-go build -o "${CLIENTGEN}" ${CODEGEN_PKG}/cmd/client-gen
-
-PREFIX=k8s.io/metrics/pkg/apis
-INPUT_BASE="--input-base ${PREFIX}"
-CLIENTSET_PATH="--output-package k8s.io/metrics/pkg/client/clientset_generated"
-
-${CLIENTGEN} --clientset-name="clientset" ${INPUT_BASE} --input metrics/v1alpha1 --input metrics/v1beta1 ${CLIENTSET_PATH} --output-base ${SCRIPT_BASE} --go-header-file ${SCRIPT_ROOT}/hack/boilerplate.go.txt
+SCRIPT_ROOT=$(dirname ${BASH_SOURCE})/..
+CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${SCRIPT_ROOT}; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
 
+# generate the code with:
+# --output-base    because this script should also be able to run inside the vendor dir of
+#                  k8s.io/kubernetes. The output-base is needed for the generators to output into the vendor dir
+#                  instead of the $GOPATH directly. For normal projects this can be dropped.
+#
 # we skip informers and listers for metrics, because we don't quite support the requisite operations yet
 # we skip generating the internal clientset as it's not really needed
+${CODEGEN_PKG}/generate-internal-groups.sh deepcopy,conversion \
+  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 \
+  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
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