let example generate

examples/alertmanager-config-template-external.jsonnet

@@ -1,28 +1,35 @@
 local configmap(name, namespace, data) = {
-    apiVersion: "v1",
+  apiVersion: 'v1',
-    kind: "ConfigMap",
+  kind: 'ConfigMap',
-    metadata : {
+  metadata: {
     name: name,
     namespace: namespace,
   },
   data: data,
- };
+};
 
 local kp =
   // different libsonnet imported
   {
+    values+:: {
+      common+: {
+        namespace: 'monitoring',
+      },
+    },
+    alertmanager+:: {
+      alertmanager+: {
+        spec+: {
+          // the important field configmaps:
+          configMaps: ['alert-templates'],  // goes to etc/alermanager/configmaps
+        },
+      },
+    },
     configmap+:: {
       'alert-templates': configmap(
         'alertmanager-alert-template.tmpl',
-          $._config.namespace,
+        $.values.common.namespace,  // could be $._config.namespace to assign namespace once
-          {"data": importstr 'alertmanager-alert-template.tmpl'},
+        { data: importstr 'alertmanager-alert-template.tmpl' },
-          )
+      ),
     },
-      alertmanager+:{
+  };
-            spec+:{
-                # the important field configmaps:
-                configMaps: ['alert-templates',], # goes to etc/alermanager/configmaps
-            },
-      },
-};
 { [name + '-configmap']: kp.configmap[name] for name in std.objectFields(kp.configmap) }