#!/usr/bin/env sh
# YES_ZSH
# YES_BASH
# YES_DASH

trunc() { ### @-
    ### truncate text to fit within your terminal using the unicode character `…`.
    [ $# -le 1 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }
    COLUMNS=${COLUMNS:-$(tput cols)}
    awk -vL=${1:-$COLUMNS} '{e=length>L?"…":"";print substr($0,0,L-(e?1:0)) e}'
}

[ "${SOURCING:-0}" -gt 0 ] || trunc "$@"