feat(plugins) Add helm diff to status (#858)

charts/manager/crds/greenhouse.sap_plugins.yaml

@@ -185,6 +185,10 @@ spec:
                   HelmReleaseStatus reflects the status of the latest HelmChart release.
                   This is only configured if the pluginDefinition is backed by HelmChart.
                 properties:
+                  diff:
+                    description: Diff contains the difference between the deployed
+                      helm chart and the helm chart in the last reconciliation
+                    type: string
                   firstDeployed:
                     description: FirstDeployed is the timestamp of the first deployment
                       of the release.

e2e/plugin/e2e_test.go

@@ -140,6 +140,14 @@ var _ = Describe("Plugin E2E", Ordered, func() {
 			g.Expect(err).NotTo(HaveOccurred())
 		}).Should(Succeed())
 
+		By("Check the diff status")
+		Eventually(func(g Gomega) {
+			err = adminClient.Get(ctx, client.ObjectKey{Name: testPlugin.Name, Namespace: env.TestNamespace}, testPlugin)
+			g.Expect(err).NotTo(HaveOccurred())
+			g.Expect(testPlugin.Status.HelmReleaseStatus).ToNot(BeNil())
+			g.Expect(len(testPlugin.Status.HelmReleaseStatus.Diff) > 0).To(BeTrue())
+		}).Should(Succeed())
+
 		By("Check replicas in deployment list")
 		Eventually(func(g Gomega) {
 			err = remoteClient.List(ctx, deploymentList, client.InNamespace(env.TestNamespace))

pkg/apis/greenhouse/v1alpha1/plugin_types.go

@@ -128,6 +128,8 @@ type HelmReleaseStatus struct {
 	LastDeployed metav1.Time `json:"lastDeployed,omitempty"`
 	// PluginOptionChecksum is the checksum of plugin option values.
 	PluginOptionChecksum string `json:"pluginOptionChecksum,omitempty"`
+	// Diff contains the difference between the deployed helm chart and the helm chart in the last reconciliation
+	Diff string `json:"diff,omitempty"`
 }
 
 //+kubebuilder:object:root=true

pkg/controllers/plugin/plugin_controller.go

@@ -301,6 +301,7 @@ func (r *PluginReconciler) reconcileStatus(ctx context.Context,
 			Status:        "unknown",
 			FirstDeployed: metav1.Time{},
 			LastDeployed:  metav1.Time{},
+			Diff:          pluginStatus.HelmReleaseStatus.Diff,
 		}
 	)