#!/bin/bash

depth=0
declare -a last

function node {
	local item dir i=0
	((depth++))
	pushd "$1" >/dev/null
	set -- *
	last[$depth]=''
	for item
	do
		((i++))
		[ "$i" -eq $# ] && last[depth]=X	
		for ((dir=1; dir<depth; dir++))
		do
			if [ "${last[dir]}" = X ]
			then printf "   "
			else printf "|  "
			fi
		done
		if [ "${last[depth]}" = X ]
		then printf -- "\`--- %s\n" "$item"
		else printf -- "+--- %s\n" "$item"
		fi
		[ -d "$item" -a ! -h "$item" ] && node "$item"
	done
	popd >/dev/null
	unset last[depth]
	((depth--))
}


shopt -s nullglob
for item
do
	printf "%s\n" "$item"
	node "$item"
done