Bash GetOpt example

getopt.sh

#!/bin/bash
PROGRAM=$(basename $0)
VERSION="0.0.1"

OPT_VERBOSE=0
OPT_FORCE=0
OPT_CLEAN=0
OPT_TEST=0

# Verbose modes
VQUIET=0
VNORM=1
VLOUD=2
VDEBUG=3

version() {
    echo -e "\n$0 $VERSION - Donovan C. Young"
}   

usage() {
    version;
    cat <<EOT

    Usage: $PROGRAM OPTIONS < -b <build> | -s <server> >

        One of the following commands are required:

      * -b|--build <build>   : The 4-digit release printed on the DVD (required)
      * -s|--server <server> : Use <server> for NCOA image (assumes Rsync mode)

        And any combination of the following OPTIONS are optional:

        -c|--clean           : Run the ncoa_clean.sh script prior to install
        -f|--force           : Force the install regardless of current status
                               (use this to restart a bad install)
        -h|--help            : Print this help message.
        -t|--test            : Run tests even if already installed
        --notest             : Do not run tests
        -v|--verbose         : Provide more feedback (may be given more than once)
        -V|--version         : Display the program version and exit

    * Required

EOT
    exit 3
}

OPTIONS=$(getopt -n $0 -o b:cfhs:tvV --long build:,clean,force,help,server:,test,notest,verbose,version -- "$@")
[[ $? -ne 0 ]] && usage

eval set -- "$OPTIONS"

while true ; do
    case $1 in
        -b|--build   ) BUILD_NUM=$2; shift;;
        -c|--clean   ) OPT_CLEAN=1;;
        -f|--force   ) OPT_FORCE=1;;
        -h|--help    ) usage;;
        -s|--server  ) RSERVER=$2; shift;;
        -t|--test    ) OPT_TEST=1;;
        --notest     ) DOTEST=0;;
        -v|--verbose ) ((OPT_VERBOSE++));;
        -V|--version ) version; myexit;;
        --      ) shift; break;;
        *       ) usage;;
    esac
    shift
done