fn main() -> Result<(), Box> { println!("cargo:rerun-if-changed=src/proto/payment_processor.proto"); tonic_build::configure() .protoc_arg("--experimental_allow_proto3_optional") .type_attribute(".", "#[allow(missing_docs)]") .field_attribute(".", "#[allow(missing_docs)]") .compile_protos(&["src/proto/payment_processor.proto"], &["src/proto"])?; Ok(()) }