Is there a good way to disable cbindgen while running tests so I can get decent error messages from cargo instead the very generic CbindgenErrors?

hm, not that i know of. this is the "edit both externs.rs/lib.rs and native.py at the same time" case

i just comment out stuff in

<http://cffi_build.rs|cffi_build.rs>

whenever the cargo build isn't quite working

I have been meaning to pull out engine/src/lib.rs into its own crate which depends on the implementation details of the engine crate, so that we’re only cbindgen-ing the ffi interface, and syntax errors elsewhere in the crate don’t get swallowed into generic cbindgen issues. But that sounds like it won’t actually help you here 🙂