Create a new shell script using an older shell script

newscript

#! /bin/bash

if [ "$#" != "1" ]
then
   echo "usage: newscript NAME" 1>&2
   exit 1
fi

script_name=$1

if [ -f "${script_name}" ]
then
   echo "error: ${script_name} already exists." 1>&2
   exit 2
fi

cat <<EOF > ${script_name}
#! /bin/bash
# ${script_name} - description

EOF

chmod u+x ${script_name}

if [ ! -z ${EDITOR} ]
then
    ${EDITOR} ${script_name}
fi