Merge pull request kubernetes#128134 from siyuanfoundation/script

add instructions into verify-featuregates script.

Author: k8s-ci-robot

hack/verify-featuregates.sh

@@ -28,4 +28,7 @@ source "${KUBE_ROOT}/hack/lib/init.sh"
 
 cd "${KUBE_ROOT}"
 
-go run test/featuregates_linter/main.go feature-gates verify
+if ! go run test/featuregates_linter/main.go feature-gates verify; then
+  echo "Please run 'hack/update-featuregates.sh' to update the feature list."
+  exit 1
+fi

test/featuregates_linter/cmd/feature_gates.go

@@ -96,19 +96,23 @@ func NewUpdateFeatureListCommand() *cobra.Command {
 
 func verifyFeatureListFunc(cmd *cobra.Command, args []string) {
 	if err := verifyOrUpdateFeatureList(k8RootPath, unversionedFeatureListFile, false, false); err != nil {
-		panic(err)
+		fmt.Fprintf(os.Stderr, "Failed to verify feature list: \n%s", err)
+		os.Exit(1)
 	}
 	if err := verifyOrUpdateFeatureList(k8RootPath, versionedFeatureListFile, false, true); err != nil {
-		panic(err)
+		fmt.Fprintf(os.Stderr, "Failed to verify versioned feature list: \n%s", err)
+		os.Exit(1)
 	}
 }
 
 func updateFeatureListFunc(cmd *cobra.Command, args []string) {
 	if err := verifyOrUpdateFeatureList(k8RootPath, unversionedFeatureListFile, true, false); err != nil {
-		panic(err)
+		fmt.Fprintf(os.Stderr, "Failed to update feature list: \n%s", err)
+		os.Exit(1)
 	}
 	if err := verifyOrUpdateFeatureList(k8RootPath, versionedFeatureListFile, true, true); err != nil {
-		panic(err)
+		fmt.Fprintf(os.Stderr, "Failed to update versioned feature list: \n%s", err)
+		os.Exit(1)
 	}
 }