move cache config for configmaps to a dedicated function

main.go

@@ -180,17 +180,10 @@ func run() error {
 			// The operator handles various resource that are namespace-scoped, and additionally some resources that are cluster-scoped (clusterroles, clusterrolebindings, etc.).
 			// For namespace-scoped resources we want to restrict the operator permissions to only fetch resources from a given namespace.
 			ByObject: map[client.Object]cache.ByObject{
-				&appsv1.Deployment{}: {Field: setNamespaceFieldSelector()},
-				&appsv1.ReplicaSet{}: {Field: setNamespaceFieldSelector()},
-				&appsv1.DaemonSet{}:  {Field: setNamespaceFieldSelector()},
-				&corev1.ConfigMap{}: {
-					Namespaces: map[string]cache.Config{
-						"kube-system": {
-							FieldSelector: fields.SelectorFromSet(fields.Set{"metadata.name": "shoot-info"}),
-						},
-						telemetryNamespace: {},
-					},
-				},
+				&appsv1.Deployment{}:          {Field: setNamespaceFieldSelector()},
+				&appsv1.ReplicaSet{}:          {Field: setNamespaceFieldSelector()},
+				&appsv1.DaemonSet{}:           {Field: setNamespaceFieldSelector()},
+				&corev1.ConfigMap{}:           {Namespaces: setConfigMapNamespaceFieldSelector()},
 				&corev1.ServiceAccount{}:      {Field: setNamespaceFieldSelector()},
 				&corev1.Service{}:             {Field: setNamespaceFieldSelector()},
 				&networkingv1.NetworkPolicy{}: {Field: setNamespaceFieldSelector()},
@@ -463,6 +456,15 @@ func setNamespaceFieldSelector() fields.Selector {
 	return fields.SelectorFromSet(fields.Set{"metadata.namespace": telemetryNamespace})
 }
 
+func setConfigMapNamespaceFieldSelector() map[string]cache.Config {
+	return map[string]cache.Config{
+		"kube-system": {
+			FieldSelector: fields.SelectorFromSet(fields.Set{"metadata.name": "shoot-info"}),
+		},
+		telemetryNamespace: {},
+	}
+}
+
 func createSelfMonitoringConfig() telemetry.SelfMonitorConfig {
 	return telemetry.SelfMonitorConfig{
 		Config: selfmonitor.Config{