extern crate cbindgen;

use cbindgen::Config;

use std::env;

use std::path::PathBuf;

fn main() {

    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();

    let package_name = env::var("CARGO_PKG_NAME").unwrap();

    let output_file = target_dir()

        .join(format!("{}.hpp", package_name))

        .display()

        .to_string();

    let config = Config {

        namespace: Some(String::from("hwengine")),

        ..Default::default()

    };

    cbindgen::generate_with_config(&crate_dir, config)

        .unwrap()

        .write_to_file(&output_file);

}

fn target_dir() -> PathBuf {

    if let Ok(target) = env::var("CARGO_TARGET_DIR") {

        PathBuf::from(target)

    } else {

        PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap()).join("target")

    }

}