let mut latest_touch = 0;
                let mut latest_change = 0;
                for c in txn.iter_touched(output_item.pos)? {
                    let (inode, change) = c?;
                    if inode < output_item.pos {
                        continue;
                    } else if inode > output_item.pos {
                        break;
                    }
                    if let Some(t) = txn.get_changeset(T::changes(&channel), change)? {
                        if t > latest_change || latest_touch == 0 {
                            latest_change = t;
                            let ext = txn.get_external(change)?.unwrap();
                            let c = changes.get_header(&ext).map_err(ArchiveError::P)?;
                            latest_touch = c.timestamp.timestamp() as u64
                        }
                    }
                }

                let latest_touch = get_latest_touch(changes, txn, &channel, output_item.pos)?;

fn get_latest_touch<
    'a,
    T: ChannelTxnT + DepsTxnT<DepsError = <T as GraphTxnT>::GraphError>,
    P: ChangeStore,
    A: std::error::Error + 'static,
>(
    changes: &P,
    txn: &T,
    channel: &T::Channel,
    pos: Position<ChangeId>,
) -> Result<u64, ArchiveError<P::Error, T::GraphError, A>> {
    let mut latest_touch = 0;
    let mut latest_change = 0;
    let mut touch_iter = Some(txn.iter_touched(pos)?);
    let mut log_iter = changeid_rev_log(txn, &channel, None)?;
    let mut continue_ = true;
    while continue_ {
        continue_ = false;
        if let Some(ref mut it) = touch_iter {
            if let Some(c) = it.next() {
                debug!("inode, change = {:?}", c);
                let (inode, change) = c?;
                if inode > pos {
                    touch_iter = None;
                } else if inode == pos {
                    if let Some(t) = txn.get_changeset(T::changes(&channel), change)? {
                        if t > latest_change || latest_touch == 0 {
                            latest_change = t;
                            let ext = txn.get_external(change)?.unwrap();
                            let c = changes.get_header(&ext).map_err(ArchiveError::P)?;
                            latest_touch = c.timestamp.timestamp() as u64
                        }
                    }
                    continue_ = true;
                }
            }
        }
        if let Some(l) = log_iter.next() {
            debug!("int = {:?}", l);
            let (_, (int, _)) = l?;
            if txn.get_touched_files(pos, Some(int))?.is_some() {
                let ext = txn.get_external(int)?.unwrap();
                let c = changes.get_header(&ext).map_err(ArchiveError::P)?;
                latest_touch = c.timestamp.timestamp() as u64;
                break;
            }
            continue_ = true;
        }
    }
    Ok(latest_touch)
}