Basic treesize bash script with du & better defaults

treesize.sh

#/bin/sh
#set -x #echo on

if [ "$1" == "-h" ]; then 
        echo "usage: treesize [depth (0)] [sizelimit (1MB)]"
        echo ""
        echo "example: treesize 3 20G"
        echo ""
        echo "Show all folders larger than 20GBs & only scan 3 directories in deep"
        echo "defaults are 0 depth, 1MB limit equiv to treesize 0 1MB"
        exit
fi

if [ "$1" == "" ]; then
        DEPTH="-d0"
else
        DEPTH="-d$1"
fi

if [ "$2" == "" ]; then
        SIZE="-t1MB"
else
        SIZE="-t$2"
fi

du -hx $SIZE $DEPTH * | sort -h;