Generic way to build first stage

[vonbox]

With buildah bud --target=layer0 . I can build the first stage of a multistage containerfile. Is there a way to specify the first layer without me needing to name it, or without needing to know the name? Something like buildah bud --target=0 .?
I am trying to create a kinda generic script that should be able to build the first stage of any containerfile.

[nalind]

That's not something it currently supports, but it would be a fairly simple addition to https://github.com/openshift/imagebuilder/, which we use as a library inside of buildah bud to handle the --target flag. I'll create an issue and transfer it there.

[nalind]

Opened openshift/imagebuilder#274.