Okay, cool. So

cython_library

might include both

.pyx

and

setup.py

, right? Your subclass of

GenerateSourcesRequest

will have a property called

protocol_sources: Snapshot

, which will include the

sources

files associated with your

cython_library

. To find the

setup.py

file within it, you can iterate over

generate_sources_request.snapshot.files

You would only need to call

await Get(SourceFiles, SourceFilesRequest)

if you are also getting the sources for dependencies of your

cython_library