Implement namespace overriding

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

@@ -165,7 +165,8 @@ spec:
                   Defaults to false.
                 type: boolean
               targetNamespace:
-                description: TargetNamespace sets or overrides the kustomization namespace.
+                description: TargetNamespace sets or overrides the namespace in the
+                  kustomization.yaml file.
                 maxLength: 63
                 minLength: 1
                 type: string

controllers/kustomization_generator.go

@@ -76,6 +76,10 @@ func (kg *KustomizeGenerator) WriteFile(dirPath string) (string, error) {
 		}
 	}
 
+	if kg.kustomization.Spec.TargetNamespace != "" {
+		kus.Namespace = kg.kustomization.Spec.TargetNamespace
+	}
+
 	kd, err := yaml.Marshal(kus)
 	if err != nil {
 		return "", err

docs/api/kustomize.md

@@ -196,7 +196,8 @@ string
 </td>
 <td>
 <em>(Optional)</em>
-<p>TargetNamespace sets or overrides the kustomization namespace.</p>
+<p>TargetNamespace sets or overrides the namespace in the
+kustomization.yaml file.</p>
 </td>
 </tr>
 <tr>
@@ -657,7 +658,8 @@ string
 </td>
 <td>
 <em>(Optional)</em>
-<p>TargetNamespace sets or overrides the kustomization namespace.</p>
+<p>TargetNamespace sets or overrides the namespace in the
+kustomization.yaml file.</p>
 </td>
 </tr>
 <tr>