Description
Motivation
Given one or many proto_library targets with dependencies, one would like to put them all into a single Swift module.
Currently, it is possible only if labels for all proto_library targets and their dependent targets are manually repeated in the protos attribute of the swift_proto_library rule.
However, this creates a maintenance hell, as each time one of the proto_library targets gets modified, the same change needs to be reflected in this swift_proto_library aggregation target, resulting in two sources of truth.
It would be great if this could be done automatically, by only providing the leaf proto_library targets.
Proposed solution
The idea is to create an aspect that collects ProtoInfo transitively and add an attribute that uses it to the swift_proto_library rule.
@AttilaTheFun I'm tagging you as requested :)