fn main() {
    let p = std::env::args().nth(1).unwrap();
    let t = std::time::Instant::now();
    let m = jet::images::scan_file(std::path::Path::new(&p), None, |_, _| Ok(())).unwrap();
    let zeros: u64 = m.chunks.iter().filter(|c| c.is_zeros()).map(|c| c.1 as u64).sum();
    let need = m.needed();
    let need_bytes: u64 = need.iter().map(|h| m.chunks.iter().find(|c| c.hash() == *h).unwrap().1 as u64).sum();
    let json = serde_json::to_vec(&m).unwrap();
    println!(
        "hash {}… size {} MiB, {} chunks, zeros {} MiB, distinct non-zero {} ({} MiB), manifest {} KiB, {:.1} s",
        &m.hash[..12],
        m.size >> 20,
        m.chunks.len(),
        zeros >> 20,
        need.len(),
        need_bytes >> 20,
        json.len() >> 10,
        t.elapsed().as_secs_f64()
    );
}