and it's gotten ridiculously easy to inject either resources or code into the build for a target... https://github.com/pantsbuild/pants/blob/master/src/python/pants/backend/jvm/tasks/prepare_services.py is an example for resources, and for https://github.com/pantsbuild/pants/blob/master/src/python/pants/backend/codegen/tasks/ragel_gen.py generating code