gistfile1.txt

fn parse_hex_hash(s: &str) -> nom::IResult<&str, apt::Hash> {
    let (s, bytes) = many0(parse_hex_byte)(s)?;
    let hash = match bytes.len() {
        16 => {
               let mut md5 = [0u8; 16];
               md5.copy_from_slice(&bytes[..16]);
               apt::Hash::md5(md5)
              }
        20 => {
               let mut sha1 = [0u8; 20];
               sha1.copy_from_slice(&bytes[..20]);
               apt::Hash::sha1(sha1)
              }
        32 => {
               let mut sha256 = [0u8; 32];
               sha256.copy_from_slice(&bytes[..32]);
               apt::Hash::sha256(sha256)
              }
        64 => {
               let mut sha512 = [0u8; 64];
               sha512.copy_from_slice(&bytes[..64]);
               apt::Hash::sha512(sha512)
              }
        _  => panic!(),
    };
    Ok((s, hash))
}

gistfile2.txt

//pub mod package;
pub mod release;

#[allow(non_camel_case_types)]
#[derive(PartialEq)]
pub enum Compression {
    none(usize),
    bz2(usize),
    gz(usize),
    xz(usize),
}

#[allow(non_camel_case_types)]
#[derive(PartialEq)]
pub enum Arch {
    aarch64,
    amd64,
    arm64,
    armhf,
    i386,
    ppc64el,
    riscv64,
    s390x,
}

#[allow(non_camel_case_types)]
#[derive(PartialEq)]
pub enum Hash {
    md5([u8; 16]),
    sha1([u8; 20]),
    sha256([u8; 32]),
    sha512([u8; 64]),
}