/* 
 * Copyright (c) 2023 YAC
 * SPDX-License-Identifier: FSFAP
 *
 * Copying and distribution of this file, with or without modification, are
 * permitted in any medium without royalty provided the copyright notice and
 * this notice are preserved.  This file is offered as-is, without any warranty.
 */ 

extern crate bindgen;

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

fn main() {
  let mut header = String::new();
  let home = match env::var("HOME") {
    Ok(val) => val,
    Err(error) => {
      eprintln!("{}", error);
      "/home/include/".to_string()
    },
  };
  
  for file in [
    format!("{}/include/sysexits.h", home),
    "/usr/local/include/sysexits.h".to_string(),
    "/usr/include/sysexits.h".to_string()
  ] {
    if Path::new(&file).is_file() {
      header = file;
      break;
    }
  }

  let bindings = bindgen::Builder::default()
    .header(&header)
    .parse_callbacks(Box::new(bindgen::CargoCallbacks))
    .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!");
}