use std::path::PathBuf;

fn main() {
    println!("cargo:rerun-if-changed=main.rs");

    let proto_dir = PathBuf::from(std::env!("CARGO_MANIFEST_DIR"))
        .join("schemas")
        .join("proto");

    let proto_files = proto_dir
        .read_dir()
        .unwrap()
        .flatten()
        .map(|e| (e.path(), e.metadata()))
        .filter_map(|(path, file_type)| {
            file_type
                .ok()
                .filter(|file_type| file_type.is_file())
                .map(|_| path)
        })
        .collect::<Vec<_>>();

    if proto_files.is_empty() {
        panic!("failed to find any proto files in {}", proto_dir.display());
    }

    tonic_build::compile_protos(proto_files.first().unwrap()).unwrap();
}