#!/usr/bin/env bash
is_empty() {
    while read -r; do
        [ ! -d "$REPLY" ] && [ -s "$REPLY" ] && return 1
    done < <(find ${1:-.})
    # TODO: done < <(find ${1:-.} -type f -print -quit)
    # this needs to skip empty files as well.
    return 0
}
is_empty "$@"