getopt for long flag reads

gistfile1.txt

#!/bin/bash

if ! options=$(getopt -o abc: -l along,blong,clong: -- "$@")
then
    exit 1
fi

while [ $# -gt 0 ]
do
    case $1 in
    -a|--along) echo "a or along" ;;
    -b|--blong) echo "b or blong" ;;
    (--) shift; break;;
    (-*) echo "$0: error - unrecognized option $1" 1>&2; exit 1;;
    (*) break;;
    esac
    shift
done