Support objectSelector in webhook's code markers

[pmalek]

What do you want to happen?

Webhook code markers already support several aspects of webhook configuration https://book.kubebuilder.io/reference/markers/webhook.

This issue tracks the effort of adding support for objectSelector.

Extra Labels

No response

[camilamacedo86]

This one need to be moved to controller-tools
The markers are implemented there.

@sbueringer could you please move this one?

[pmalek]

@camilamacedo86 Thanks for the pointer! Indeed that's meant to land in controller-tools and I've missed the issue that was already created for this feature:

kubernetes-sigs/controller-tools#553

I guess we can close this one and reopen that one.

To me it looks like it would boil down to extending the config: https://github.com/kubernetes-sigs/controller-tools/blob/76b24b2709ba146f7794941ac0cdcb437144f64a/pkg/webhook/parser.go#L61-L136 but we'd need to agree on the API (since the nested structure of objectSelector makes it a bit more nuanced to "get right" than other fields.