Idea: capture all paths used when parsing Dockerfile. Then proactively find all

PackageFieldSet

(your new code) and inspect their `output_path`s to determine what file paths can be created. Compare those `output_path`s with the parsed paths, and if any are a match, infer a dep on the binary target I think that will both handle

go_binary

and handle when you override

output_path

on a

pex_binary

target. Wdyt?