#!/bin/bash
set -eu
function print_hr() {
	local str cols
	local start line end

	str="${1:-}"
	[[ -n $str ]] && str=" $str "
	cols=$((${COLUMNS:-$(tput cols)} - ${#str} - 3))
	# start=$'\e(0'; end=$'\e(B'; line="qqq"
	start=''; end=''; line="─"
	while ((${#line}<$cols)); do line+=$line; done

	printf "╾"
	printf "%s%s%s" "$start" "${line:0:$((cols/2))}" "$end"
	printf "%s%s%s" "$start" "${line:0:$((cols/2))}" "$end"
	printf "%s" "$str"
	printf "%s%s%s" "$start" "${line:0:1}" "$end"
	printf "╼"
	printf "\n"
}
print_hr "$@"