use std::path::Path;
fn main() -> Result<(), Box<dyn std::error::Error>> {
let proto_path: &Path = "proto/main.proto".as_ref();
let target = std::env::var("TARGET").unwrap();
let proto_dir = proto_path
.parent()
.expect("proto file should reside in a directory");
tonic_build::configure()
.build_transport(target != "wasm32-unknown-unknown")
.compile_protos(&[proto_path], &[proto_dir])?;
Ok(())
}