Simple tree -d reproduction using bash

list-tree.sh

#!/bin/bash
if [ $# -lt 1 ] ; then
        $1="~/";
fi
# print the header
echo ".";
echo "|-- $1";
parent="$1";
padding="";
recurse() {
for i in "$1"/*; do
        if [ -d "$i" ]; then
                cur_dir=$(echo "$i" | sed "s/$parent\///g");
                this=$(echo "$cur_dir" | sed "s/$2\///g");
                if [ "$2" == "" ]; then
                        padding=" ";
                else
                        padding="    |";
                fi
                echo "$padding   |-- $this";
                #echo "$i"
                recurse "$i" "$this";
        fi
done
}
recurse $1