chatmail-core/deltachat-ffi/build.rs

fn main() {
    let crate_dir = std::env::var("CARGO_MANIFEST_DIR").unwrap();

    let cfg = cbindgen::Config::from_root_or_default(std::path::Path::new(&crate_dir));

    let c = cbindgen::Builder::new()
        .with_config(cfg)
        .with_crate(crate_dir)
        .with_language(cbindgen::Language::C)
        .generate();

    // This is needed to ensure we don't panic if there are errors in the crates code
    // but rather just tell the rest of the system we can't proceed.
    match c {
        Ok(res) => {
            res.write_to_file("deltachat.h");
        }
        Err(err) => {
            eprintln!("unable to generate bindings: {:#?}", err);
            std::process::exit(1);
        }
    }
}