#!/usr/bin/env bash

set -e

usage() {
	echo 'Usage: command | surround <STRING...>

Add STRING to the front and end of every line from command'
	exit "${1:-0}"
}

havecmd -v perl || exit $?

main() {
	if [[ "$1" == "-h" ]]; then
		usage 0
	fi
	if [[ -z "$1" ]]; then
		echo 'Must provide STRING to surround lines with' >&2
		usage 1
	fi
	export SURROUND="$*"
	exec perl -pe 's/^/$ENV{SURROUND}/; s/$/$ENV{SURROUND}/'
}

main "$@" || exit $?