feat: Expanding Query Types for creating "Query Result" dashboard variables

custom/dashboard/variable.libsonnet

@@ -259,6 +259,15 @@ local d = import 'github.com/jsonnet-libs/docsonnet/doc-util/main.libsonnet';
             if metric == ''
             then var.withQuery('label_values(%s)' % label)
             else var.withQuery('label_values(%s, %s)' % [metric, label]),
+
+          '#withQueryResult':: d.func.new(
+            'Construct a Prometheus template variable using `query_result()`.',
+            args=[
+              d.arg('query', d.T.string),
+            ]
+          ),
+          withQueryResult(query):
+            var.withQuery('query_result(%s)' % query),
         },
 
         // Deliberately undocumented, use `refresh` below

docs/API/dashboard/variable.md

@@ -120,6 +120,7 @@ g.dashboard.new('my dashboard')
       * [`fn withValueOnly()`](#fn-querygeneraloptionsshowondashboardwithvalueonly)
   * [`obj queryTypes`](#obj-queryquerytypes)
     * [`fn withLabelValues(label, metric="")`](#fn-queryquerytypeswithlabelvalues)
+    * [`fn withQueryResult(query)`](#fn-queryquerytypeswithqueryresult)
   * [`obj refresh`](#obj-queryrefresh)
     * [`fn onLoad()`](#fn-queryrefreshonload)
     * [`fn onTime()`](#fn-queryrefreshontime)
@@ -898,6 +899,17 @@ PARAMETERS:
    - default value: `""`
 
 Construct a Prometheus template variable using `label_values()`.
+##### fn query.queryTypes.withQueryResult
+
+```jsonnet
+query.queryTypes.withQueryResult(query)
+```
+
+PARAMETERS:
+
+* **query** (`string`)
+
+Construct a Prometheus template variable using `query_result()`.
 #### obj query.refresh