Parse command line options (parameters) in bash.

process-command-line-options.sh

################################################################################
# Command line processing
################################################################################

# Parse the command line arguments. 
while [ "$#" -gt "0" ]; do
    case "$1" in
     
    #   TODO:    Create some script options. 
    #   EXAMPLE: Uncomment below to assign a 'destination directory', DST_DIR, 
    #            to the arg given after a '-d' or '--dst' on the command line.
    # 
    #   -d|--dst)
    #       shift 1 # eat the '-d' or '--dst'
    #       DST_DIR="$1" # assign the next arg as this variable 
    #       shift 1 # eat the arg you just assigned
    #       ;;
        -r|--remove)
            shift 1
            removePackages
            ;;
        -h|--help)
            outputUsage
            ;;
        -*|--*)
            errorMessage "Unknown option $1"
            ;;
        *)
            errorMessage "Unknown parameter $1"
            ;;
    esac
done