extern crate bindgen;

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

fn main() {
    let zephyr_sdk_install_dir = PathBuf::from(env::var("ZEPHYR_SDK_INSTALL_DIR").unwrap());

    let bindings = bindgen::Builder::default()
        // Only use core, as we are in embedded land
        .use_core()
        // The input header we would like to generate
        // bindings for.
        .header("src/wrapper.h")
        .clang_args(
            env::var("TARGET_CFLAGS")
                .unwrap()
                .split(' ')
                .filter(|&el| el != "-mfp16-format=ieee" && el != "-fno-reorder-functions"),
        )
        .clang_arg(format!(
            "-I{}",
            zephyr_sdk_install_dir
                .join("arm-zephyr-eabi/arm-zephyr-eabi/sys-include")
                .to_str()
                .unwrap()
        ))
        // only allow CONFIG_ defines
        .allowlist_item("^CONFIG_.*")
        // Tell cargo to invalidate the built crate whenever any of the
        // included header files changed.
        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
        // Finish the builder and generate the bindings.
        .generate()
        // Unwrap the Result and panic on failure.
        .expect("Unable to generate bindings");

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