#!/bin/bash

######################################################################

#

#   tcar_setArguments.sh -- This function uses getopt to process

#   arguments passed to centos-art.sh script.

#

#   This function works with the following three variables:

#

#       ARGSS

#           Stores getopt short arguments definition.

#

#       ARGSL

#           Stores getopt long arguments definition.  

#

#       TCAR_ARGUMENTS

#           Stores arguments passed to functions or command-line

#           interface depending the context it is defined.

#

#   These three variables are not defined in this function but the

#   function environment you want to provide option parsing for,

#   through getopt command. Using local definition for these three

#   variables let you to nest option parsing inside different

#   function-environment levels.

#

#   Written by:

#   * Alain Reguera Delgado <al@centos.org.cu>, 2009-2013

#

# Copyright (C) 2009-2013 The CentOS Artwork SIG

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or (at

# your option) any later version.

#

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

#

######################################################################

function tcar_setArguments {

    local ARGUMENT=''

    # Fill up arguments global variable with current positional

    # parameter  information. To avoid interpretation problems, use

    # single quotes to enclose each argument (TCAR_ARGUMENTS) from

    # command-line individually.

    for ARGUMENT in "${@}"; do

        # Remove any single quote from arguments passed to

        # centos-art.sh script. We will use single quotes for grouping

        # option values so white space can be passed through them.

        ARGUMENT=$(printf %s "${ARGUMENT}" | tr -d "'")

        # Concatenate arguments and enclose them to let getopt to

        # process them when they have spaces inside.

        TCAR_ARGUMENTS="${TCAR_ARGUMENTS} '${ARGUMENT}'"

    done

    # Verify non-option arguments passed to command-line. If there

    # isn't any or dot is provided, redefine the TCAR_ARGUMENTS

    # variable to use the current location the centos-art.sh script

    # was called from.

    if [[ -z "${TCAR_ARGUMENTS}" ]];then

        TCAR_ARGUMENTS=${PWD}

    fi

    # Verify presence of either short or long options in the

    # environment. If they are present apply option validation through

    # getopt.

    if [[ ! -z ${ARGSS} ]] || [[ ! -z ${ARGSL} ]];then

        # Redefine positional parameters using TCAR_ARGUMENTS variable.

        eval set -- "${TCAR_ARGUMENTS}"

        # Process positional parameters using getopt's option validation.

        TCAR_ARGUMENTS=$(getopt -o "${ARGSS}" -l "${ARGSL}" \

            -n "${TCAR_SCRIPT_COMMAND} (${MODULE_NAME})" -- "${@}")

        # Verify getopt's exit status and finish the script execution

        # with an error message, if it failed.

        if [[ $? -ne 0 ]];then

            tcar_printMessage "`gettext "The argument verification failed."`" --as-error-line

        fi

    fi

}