A small example on Bash getopts. #bash #getopt #getopts

getopt-example.sh

#!/bin/bash

#
# Example using getopt (vs builtin getopts) that can also handle long options.
# Another clean example can be found at:
# http://www.bahmanm.com/blogs/command-line-options-how-to-parse-in-bash-using-getopt
#

aflag=n
bflag=n
cargument=

# Parse options. Note that options may be followed by one colon to indicate 
# they have a required argument
if ! options=$(getopt -o abc: -l along,blong,clong: -- "$@")
then
    # Error, getopt will put out a message for us
    exit 1
fi

set -- $options

while [ $# -gt 0 ]
do
    # Consume next (1st) argument
    case $1 in
    -a|--along) 
      aflag="y" ;;
    -b|--blong) 
      bflag="y" ;;
    # Options with required arguments, an additional shift is required
    -c|--clong) 
      cargument="$2" ; shift;;
    (--) 
      shift; break;;
    (-*) 
      echo "$0: error - unrecognized option $1" 1>&2; exit 1;;
    (*) 
      break;;
    esac
    # Fetch next argument as 1st
    shift
done

getopts-example.sh

#!/bin/bash

while getopts ":da:" opt; do
    case $opt in
        d)
            echo "Entering DEBUG mode"
            ;;
        a)
            echo "Got option 'a' with argurment ${OPTARG}"
            ;;
        :)
            echo "Error: option ${OPTARG} requires an argument" 
            ;;
        ?)
            echo "Invalid option: ${OPTARG}"
            ;;
    esac
done

shift $((OPTIND-1))

echo "Remaining args are: <${@}>"

This: ${@} is useful as hell! Thanks for sharing 😄

Very useful! 😄 Thank you so much