Modified code for patches and patchJson6902 which will throw error is…

… target is not found

removed changes for patch

modified plugin and removed changes from generated file

added test case for patchesJson6902

modified test and generated data

api/krusty/extendedpatch_test.go

@@ -1213,3 +1213,45 @@ spec:
     app: busybox
 `)
 }
+
+func TestTargetMissingPatchError(t *testing.T) {
+	th := kusttest_test.MakeHarness(t)
+	makeCommonFileForExtendedPatchTest(th)
+	th.WriteK("base", `
+resources:
+- servicemonitor.yaml
+patchesJson6902:
+- target:
+    group: monitoring.coreos.com
+    kind: ServiceMonitor
+    name: starboard-exporter
+    namespace: starboard
+    version: v2
+
+  path: patch.0.yaml
+`)
+	th.WriteF("base/servicemonitor.yaml", `
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  labels:
+    app: starboard-exporter
+  name: starboard-exporter
+  namespace: starboard
+spec:
+  endpoints:
+  - path: /metrics
+    port: metrics
+  selector:
+    matchLabels:
+      app.kubernetes.io/instance: starboard-exporter
+      app.kubernetes.io/name: starboard-exporter
+`)
+	th.WriteF("base/patch.0.yaml", `
+- op: add
+  path: /metadata/labels/release
+  value: kube-prometheus-stack
+`)
+	err := th.RunWithErr("base", th.MakeDefaultOptions())
+	assert.Contains(t, err.Error(), "patchesJson6902 target not found for ServiceMonitor.v2.monitoring.coreos.com/starboard-exporter.starboard:a=:l= Bailing out.")
+}

plugin/builtin/patchjson6902transformer/PatchJson6902Transformer.go

@@ -82,6 +82,11 @@ func (p *plugin) Transform(m resmap.ResMap) error {
 	if err != nil {
 		return err
 	}
+
+	if resources == nil {
+		return fmt.Errorf("patchesJson6902 target not found for %s Bailing out.", p.Target)
+	}
+
 	for _, res := range resources {
 		internalAnnotations := kioutil.GetInternalAnnotations(&res.RNode)