kubectl apply prune support

[mxey]

David Gageot on Slack asked me to file this is as a feature request.

I'd like Skaffold to support the prune feature of kubectl, in both the kubectl and kustomize deployer.

[dlorenc]

Do you think this should be on always, or available as a flag?

[r2d4]

Always on won't let multiple users use skaffold on the same cluster (unless we prune on a user-specific label)

[mxey]

@dlorenc I think it should be a flag, because not everybody might want it, and having it on by default could be a bad surprise.

@r2d4 it definitely would have to be a user-specified label selector, so people could use it with multiple Skaffold-ed applications. It should be a label selector, not just a single label. For example, I might have a combination of app=myapp,environment=featurebranchXYZ.

Maybe just allow for arbitrary options to kubectl? Would also be useful for --force.

[nkubala]

This should be fixed through #807