Blame Automation/Scripts/tcar_setArguments.sh

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#!/bin/bash
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######################################################################
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#
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#   tcar_setArguments.sh -- This function uses getopt to process
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#   arguments passed to centos-art.sh script.
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#
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#   This function works with the following three variables:
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#
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#       ARGSS
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#           Stores getopt short arguments definition.
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#
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#       ARGSL
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#           Stores getopt long arguments definition.  
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#
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#       TCAR_ARGUMENTS
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#           Stores arguments passed to functions or command-line
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#           interface depending the context it is defined.
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#
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#   These three variables are not defined in this function but the
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#   function environment you want to provide option parsing for,
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#   through getopt command. Using local definition for these three
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#   variables let you to nest option parsing inside different
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#   function-environment levels.
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#
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#   Written by: 
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#   * Alain Reguera Delgado <al@centos.org.cu>, 2009-2013
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#     Key fingerprint = D67D 0F82 4CBD 90BC 6421  DF28 7CCE 757C 17CA 3951
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#
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# Copyright (C) 2009-2013 The CentOS Project
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or (at
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# your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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#
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######################################################################
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function tcar_setArguments {
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    # Verify existence of arguments that will be processed. If there
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    # is none, return to caller.
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    if [[ -z "${@}" ]];then
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        return
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    fi
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    local ARGUMENT=''
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    # Fill up arguments global variable with current positional
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    # parameter  information. To avoid interpretation problems, use
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    # single quotes to enclose each argument (TCAR_ARGUMENTS) from
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    # command-line individually.
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    for ARGUMENT in "${@}"; do
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        # Remove any single quote from arguments passed to
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        # centos-art.sh script. We will use single quotes for grouping
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        # option values so white space can be passed through them.
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        ARGUMENT=$(echo "${ARGUMENT}" | tr -d "'")
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        # Concatenate arguments and enclose them to let getopt to
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        # process them when they have spaces inside.
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        TCAR_ARGUMENTS="${TCAR_ARGUMENTS} '${ARGUMENT}'"
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    done
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    # Verify non-option arguments passed to command-line. If there
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    # isn't any or dot is provided, redefine the TCAR_ARGUMENTS
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    # variable to use the current location the centos-art.sh script
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    # was called from.
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    if [[ -z "${TCAR_ARGUMENTS}" ]];then
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        TCAR_ARGUMENTS=${PWD}
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    fi
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    # Verify presence of either short or long options in the
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    # environment. If they are present apply option validation through
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    # getopt.
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    if [[ ! -z ${ARGSS} ]] || [[ ! -z ${ARGSL} ]];then
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        # Redefine positional parameters using TCAR_ARGUMENTS variable.
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        eval set -- "${TCAR_ARGUMENTS}"
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        # Process positional parameters using getopt's option validation.
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        TCAR_ARGUMENTS=$(getopt -o "${ARGSS}" -l "${ARGSL}" \
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            -n "${TCAR_SCRIPT_COMMAND} (${MODULE_NAME})" -- "${@}")
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        # Verify getopt's exit status and finish the script execution
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        # with an error message, if it failed.
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        if [[ $? -ne 0 ]];then
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            tcar_printMessage "`gettext "The argument verification failed."`" --as-error-line
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        fi
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    fi
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}