see https://github.com/pantsbuild/pants/compare/master...twitter:stuhood/dep-inference-demo#diff-6b820dc47841e9d57d6a561061939f11R66 for an example of what i'm expecting most process execution to look like. the primary faux-pas there is that it takes a

Snapshot

as input, which is not specific enough... should probably be a ScalaSources wrapper or something.