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rc/sh/trunc

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