use cbindgen::Language;

fn main() {
    if std::env::var_os("DOCS_RS").is_some() {
        return;
    }

    let crate_dir = std::env::var("CARGO_MANIFEST_DIR").unwrap();
    let crate_dir = std::path::PathBuf::from(&crate_dir);
    let config = cbindgen::Config::from_file(crate_dir.join("cbindgen.toml")).unwrap();
    let mut c_config = config.clone();
    c_config.language = Language::C;
    let target_dir = std::env::var("OUT_DIR").unwrap();

    let target_dir = match std::env::var("TRACING_FFI_RELATIVE_OUT_DIR") {
        Ok(relative) => std::path::PathBuf::from(&target_dir).join(relative),
        Err(_) => std::path::PathBuf::from(target_dir),
    };

    cbindgen::generate_with_config(&crate_dir, config)
        .expect("Unable to generate bindings")
        .write_to_file(target_dir.join("tracing_ffi.hpp"));

    cbindgen::generate_with_config(&crate_dir, c_config)
        .expect("Unable to generate bindings")
        .write_to_file(target_dir.join("tracing_ffi.h"));
}