feat: set default observedGeneration to -1 on Kustomizations

This is a follow-up to
https://github.com/fluxcd/helm-controller/pull/294, porting the same
code to the kustomize-controller so that all Flux 2 controllers work
the same way in this regard.

Signed-off-by: Max Jonas Werner <mail@makk.es>

.github/workflows/e2e.yaml

@@ -55,6 +55,17 @@ jobs:
           KUBEBUILDER_ASSETS: ${{ github.workspace }}/kubebuilder/bin
       - name: Load test image
         run: kind load docker-image test/kustomize-controller:latest
+      - name: Install CRDs
+        run: make install
+      - name: Run default status test
+        run: |
+          kubectl apply -f config/testdata/status-defaults
+          RESULT=$(kubectl get kustomization status-defaults -o go-template={{.status}})
+          EXPECTED='map[observedGeneration:-1]'
+          if [ "${RESULT}" != "${EXPECTED}" ] ; then
+            echo -e "${RESULT}\n\ndoes not equal\n\n${EXPECTED}"
+            exit 1
+          fi
       - name: Deploy controllers
         run: |
           make dev-deploy IMG=test/kustomize-controller:latest

api/v1beta1/kustomization_types.go

@@ -340,7 +340,8 @@ type Kustomization struct {
 	metav1.TypeMeta   `json:",inline"`
 	metav1.ObjectMeta `json:"metadata,omitempty"`
 
-	Spec   KustomizationSpec   `json:"spec,omitempty"`
+	Spec KustomizationSpec `json:"spec,omitempty"`
+	// +kubebuilder:default:={"observedGeneration":-1}
 	Status KustomizationStatus `json:"status,omitempty"`
 }
 

config/crd/bases/kustomize.toolkit.fluxcd.io_kustomizations.yaml

@@ -330,6 +330,8 @@ spec:
             - sourceRef
             type: object
           status:
+            default:
+              observedGeneration: -1
             description: KustomizationStatus defines the observed state of a kustomization.
             properties:
               conditions:

config/testdata/status-defaults/empty-kustomization.yaml

@@ -0,0 +1,4 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1beta1
+kind: Kustomization
+metadata:
+  name: status-defaults