cln-nip47/build.rs

fn main() {
    let protoc = protoc_bin_vendored::protoc_bin_path().unwrap();
    unsafe { std::env::set_var("PROTOC", protoc) };
    tonic_prost_build::configure()
        .protoc_arg("--experimental_allow_proto3_optional")
        .compile_protos(&["protos/hold.proto"], &["protos"])
        .unwrap_or_else(|e| panic!("Could not build protos: {e}"));
}