func (c *Config) overwriteRevisionIfEmpty(revision string) {
	// Overwrite the default namespace label (istio-injection=enabled)
	// with istio.io/rev=XXX. If a revision label is already provided,
	// the label will remain as is.
	if c.Revision == "" {
		c.Revision = revision
	}
	// Allow setting revision explicitly to `default` to avoid configuration overwrite
	if c.Revision == "default" {
		c.Revision = ""
	}
}

type GenerateOptions struct {
	// Tag is the name of the revision tag to generate.
	Tag string
	// Revision is the revision to associate the revision tag with.
	Revision string
	// WebhookName is an override for the mutating webhook name.
	WebhookName string
	// ManifestsPath specifies where the manifests to render the mutatingwebhook can be found.

## Upgrade Planning

```yaml
meshConfig:
  accessLogFile: /dev/stdout
```

#### Revisions

Control plane revisions allow deploying multiple versions of the control plane in the same cluster.
This allows safe [canary upgrades](https://istio.io/latest/docs/setup/upgrade/canary/)

```yaml
revision: my-revision-name

	defer logRuntime(time.Now(), "Done getting control plane revisions/versions")

	text := ""
	text += fmt.Sprintf("CLI version:\n%s\n\n", version.Info.LongForm())

	revisions := getIstioRevisions(resources)
	istioVersions, proxyVersions := getIstioVersions(ctx, istioNamespace, revisions)
	text += "The following Istio control plane revisions/versions were found in the cluster:\n"
	for rev, ver := range istioVersions {

apiVersion: release-notes/v2
kind: bug-fix
area: istioctl
issue:
  - 45242
releaseNotes:
  - |

				})
			}
		})
}

func verifyRevision(t framework.TestContext, i istioctl.Instance, podName, podNamespace, revision string) {
	t.Helper()
	pcArgs := []string{"pc", "bootstrap", podName, "-n", podNamespace}
	bootstrapConfig, _ := i.InvokeOrFail(t, pcArgs)
	expected := fmt.Sprintf("\"discoveryAddress\": \"istiod-%s.istio-system.svc:15012\"", revision)

}

func NewTagWatcher(client kube.Client, revision string) TagWatcher {
	p := &tagWatcher{
		revision: revision,
	}
	p.queue = controllers.NewQueue("tag", controllers.WithReconciler(func(key types.NamespacedName) error {
		p.notifyHandlers()
		return nil
	}))
	p.webhooks = kclient.NewFiltered[*admissionregistrationv1.MutatingWebhookConfiguration](client, kubetypes.Filter{

	overrideHelpStr = `If true, allow revision tags to be overwritten, otherwise reject revision tag updates that
overwrite existing revision tags.`
	revisionHelpStr = "Control plane revision to reference from a given revision tag"
	tagCreatedStr   = `Revision tag %q created, referencing control plane revision %q. To enable injection using this
revision tag, use 'kubectl label namespace <NAMESPACE> istio.io/rev=%s'
`

	installRevisionOrFail(t, fromVersion, configs)
	revision := strings.ReplaceAll(fromVersion, ".", "-")
	revisionedNamespace := namespace.NewOrFail(t, t, namespace.Config{
		Prefix:   revision,
		Inject:   true,
		Revision: revision,
	})

	var revisionedInstance echo.Instance
	builder := deployment.New(t)
	builder.With(&revisionedInstance, echo.Config{
		Service:   fmt.Sprintf("svc-%s", revision),
		Namespace: revisionedNamespace,