#!/bin/bash

set -eu
usage='Delete all but the newest N files given.'
eval "$(args keep-at-most n -r -u "$usage" -- "$@")"

[ "$n" -ge 1 ] || {
    echo "at-most: bad number of files to keep: $n" >&2
    exit 1
}

rm -f $(ls -t "$@" | sed -e "1,${n}d")