fn main() -> Result<()> {

    let mut args = std::env::args();

    let repo_dir = args.nth(1).expect("Missing repo_dir argument");

    let gpg_dir = PathBuf::from(args.next().expect("Missing gpg_dir argument"));

    let certs = load_keys(&gpg_dir)?;

    let repo = git2::Repository::open(repo_dir)?;

    let signatures = get_signatures(&repo)?;

    println!("got {} signatures", signatures.len());

    let r = check_signatures(&certs, signatures)?;

    let json = serde_json::to_string_pretty(&r.valid_signatures)?;

    eprintln!("{}", json);

    Ok(())

}