use std::env;
use std::io;
use std::path::PathBuf;

use lazy_static::lazy_static;

use bindgen;

lazy_static! {
    static ref OUT_DIR: PathBuf = {
        let out_dir = env::var("OUT_DIR").unwrap();
        PathBuf::from(out_dir)
    };
    static ref ROOT_DIR: PathBuf = {
        let root_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
        PathBuf::from(root_dir)
    };
}

fn main() -> io::Result<()> {
    const SECCOMP_HEADER: &str = "/usr/include/seccomp.h";
    println!("cargo:rustc-link-lib=dylib=seccomp");
    println!("cargo:rerun-if-changed={}", SECCOMP_HEADER);

    bindgen::builder()
        .header_contents("seccomp.h", "#include<seccomp.h>")
        .generate()
        .expect("Failed to generate libseccomp bindings")
        .write_to_file(OUT_DIR.join("libseccomp.rs"))?;

    Ok(())
}