Fix build of csctl (#128)

Signed-off-by: Aniruddha Basak <[email protected]>

Author: Aniruddha Basak

pkg/clusterstack/mode.go

@@ -87,18 +87,18 @@ func HandleHashMode(kubernetesVersion string) (*MetaData, error) {
 }
 
 // HandleCustomMode handles custom mode with version for all components.
-func HandleCustomMode(kubernetesVersion, clusterStackVersion, clusterAddonVersion, nodeImageVersion string) (MetaData, error) {
+func HandleCustomMode(kubernetesVersion, clusterStackVersion, clusterAddonVersion, nodeImageVersion string) (*MetaData, error) {
 	if _, err := version.New(clusterStackVersion); err != nil {
-		return MetaData{}, fmt.Errorf("failed to verify custom version for cluster stack: %q: %w", clusterStackVersion, err)
+		return nil, fmt.Errorf("failed to verify custom version for cluster stack: %q: %w", clusterStackVersion, err)
 	}
 	if _, err := version.New(clusterAddonVersion); err != nil {
-		return MetaData{}, fmt.Errorf("failed to verify custom version for cluster addon: %q: %w", clusterAddonVersion, err)
+		return nil, fmt.Errorf("failed to verify custom version for cluster addon: %q: %w", clusterAddonVersion, err)
 	}
 	if _, err := version.New(nodeImageVersion); err != nil {
-		return MetaData{}, fmt.Errorf("failed to verify custom version for node image: %q: %w", nodeImageVersion, err)
+		return nil, fmt.Errorf("failed to verify custom version for node image: %q: %w", nodeImageVersion, err)
 	}
 
-	return MetaData{
+	return &MetaData{
 		APIVersion: "metadata.clusterstack.x-k8s.io/v1alpha1",
 		Versions: Versions{
 			Kubernetes:   kubernetesVersion,