#!/bin/bash
#
# scrip - generate a script and run it
#
# Usage: mksh {-x} [script_name]
#

USAGE="Usage: mksh {-x} [script_name]"

fpath=""
exec=""

case $# in
        0 ) echo -e $USAGE; exit 0 ;;
        1 ) fpath="$1" ;;
        2 ) if [ $1 = "-x" ]
            then
                exec="Y"
                fpath="$2"
            else
                echo -e $USAGE
                exit 0
            fi ;;
esac

if [ -e $fpath ]
then
        echo "File exists, please choose another filename."
        exit 0
else #proceed

# Get the filename from the full path.
fname=`echo "${fpath}" |sed 's/.*\///'`

# Add #!/bin/bash and a header line.
echo -e "#!/bin/bash\n#\n# ${fname} - ">>$fpath

# Get the length of the filename, add 6 to get the length of line 3.
fname_length=6
let fname_length+="${#fname}"

# Open in nano with cursor at the end of line 3.
nano -c +3,$fname_length $fpath

wait $!

if [ -e $fpath ]
then
        chmod +x "${fpath}"
        if [ "$exec" = "Y" ]
        then
                ./$fpath
        fi
elif [ "$exec" = "Y" ]
then
        echo "File was not written; execution cancelled."
fi

fi