// SPDX-FileCopyrightText: 2022 Matteo Settenvini <matteo.settenvini@montecristosoftware.eu>
// SPDX-License-Identifier: GPL-3.0-or-later

extern crate bindgen;

use {std::env, std::path::PathBuf};

fn main() {
    let out_dir = std::env::var("OUT_DIR").unwrap();

    println!("cargo:rerun-if-changed=wrapper.h");

    // Required by NSS 2
    println!("cargo:rustc-cdylib-link-arg=-Wl,-soname,libnss_malcontent.so.2");

    // Enable dynamic loading of NSS module from OUT_DIR
    // (see https://doc.rust-lang.org/cargo/reference/environment-variables.html#dynamic-library-paths)
    println!("cargo:rustc-link-search={}", &out_dir);

    let bindings = bindgen::Builder::default()
        .header("wrapper.h")
        .parse_callbacks(Box::new(bindgen::CargoCallbacks))
        .newtype_enum("nss_status")
        .allowlist_type("nss_status")
        .allowlist_type("gaih_addrtuple")
        .allowlist_function("__nss_configure_lookup")
        .generate()
        .expect("Unable to generate bindings");

    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
    bindings
        .write_to_file(out_path.join("bindings.rs"))
        .expect("Couldn't write bindings!");
}