Use volumes as build source

[nicolaferraro]

/kind feature
/kind question
/area API

I'd like to start a build from a set of files on a Kubernetes volume, but I see there's no oob support for that. It's possible to start a build from a Container, but containers don't allow to specify volumes to mount (only mount points for volumes declared in the pod).

Is this a valid addition for Knative build?

I have a use case that needs a feature like this. I'm trying to fully integrate Camel K in Knative and I need a staging area where to deliver files to a build.

[imjasonh]

If you already have source in a volume on the cluster, it should already be possible to mount that volume into your steps, to somewhere other than /workspace, and build from there.

If that doesn't work for some reason it might be a bug (I've never tried it). It probably makes sense to have a VolumeResource which can be specified and reused across a Pipeline.