Bash get script directory

getDir.bash

SOURCE="$0"
while [ -h "$SOURCE" ]; do 
  # resolve $SOURCE until the file is no longer a symlink
  DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
  SOURCE="$(readlink "$SOURCE")"
  # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
  [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" 
done
DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
cd "$DIR"