#!/bin bash # Argument handling support# Usage:# - declare parameters with default values:#      declare -A ARGS=( ["<arg-name>"]=<default-value> , ... )# - source this file# - refer to argument values directly via#      ${ARGS["<arg-name>"]} if [ "${BASH_SOURCE[0]}" -ef "$0" ]then    echo "This script should not be directly executed!"    exit 1fi function print_usage {    echo "$0 usage:"    echo "All arguments are optional, below defaults are in effect for omitted ones."    echo "Syntax: --<arg-name>=<arg-value>; value defaults to \"yes\" if omitted."    for arg in ${!ARGS[@]} ; do        printf "   --%-16s %-32s\n" "$arg" "${ARGS[$arg]}"    done | sort} while [[ $# -gt 0 ]] ; do    key="$1"; shift    found=0    for arg in ${!ARGS[@]} ; do        case $key in            --$arg)                ARGS["$arg"]="yes"                found=1                break                ;;            --$arg=*)                pos=$(($(echo $arg | wc -c) + 3))                ARGS["$arg"]="$(echo $key | cut -c $pos-)"                found=1                break                ;;        esac    done    if [ $found -eq 0 ] ; then        echo "Unrecognized argument: $key"        print_usage        exit 1    fidone