#!/bin/bash

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

#

#   tcar - The CentOS Artwork Repository automation tool.

#   Copyright © 2014 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.

#

#   Alain Reguera Delgado <al@centos.org.cu>

#   39 Street No. 4426 Cienfuegos, Cuba.

#

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

declare -xr TCAR_SCRIPT_NAME="tcar"

declare -xr TCAR_SCRIPT_VERSION="0.9"

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

# Script Internationalization

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

# Set the script language information using the LC format. This format

# shows both language and country information (e.g., `es_ES').

declare -xr TCAR_SCRIPT_LANG_LC=$(echo ${LANG} | cut -d'.' -f1)

# Set the script language information using the LL format. This format

# shows only the language information (e.g., `es').

declare -xr TCAR_SCRIPT_LANG_LL=$(echo ${TCAR_SCRIPT_LANG_LC} | cut -d'_' -f1)

# Set the script language information using the CC format. This format

# shows only the country information (e.g., `ES').

declare -xr TCAR_SCRIPT_LANG_CC=$(echo ${TCAR_SCRIPT_LANG_LC} | cut -d'_' -f2)

# Set function environments required by GNU gettext system.

. gettext.sh

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

# Script Configuration Files (redefine global variables)

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

declare -xr TCAR_SCRIPT_CONFIGS="/etc/tcar/tcar.conf ${HOME}/.tcar.conf"

for TCAR_SCRIPT_CONFIG in ${TCAR_SCRIPT_CONFIGS};do

    if [[ -f ${TCAR_SCRIPT_CONFIG} ]];then

        . ${TCAR_SCRIPT_CONFIG}

    fi

done

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

# Script Global Functions

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

# Export script's environment functions.

for SCRIPT_FILE in $(ls ${TCAR_SCRIPT_BASEDIR}/tcar_*.sh);do

    if [[ -x ${SCRIPT_FILE} ]];then

        . ${SCRIPT_FILE}

        export -f $(grep '^function ' ${SCRIPT_FILE} | cut -d' ' -f2)

    else

        echo "${SCRIPT_FILE} `gettext "has not execution rights."`"

        exit 1

    fi

done

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

# Signals

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

# Trap signals in order to terminate the script execution correctly

# (e.g., removing all temporal files before leaving).  Trapping the

# exit signal seems to be enough by now, since it is always present as

# part of the script execution flow. Each time the tcar.sh

# script is executed it will inevitably end with an EXIT signal at

# some point of its execution, even if it is interrupted in the middle

# of its execution (e.g., through `Ctrl+C').

trap tcar_terminateScriptExecution 0

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

# Default Action

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

if [[ $# -eq 0 ]];then

    tcar_printUsage

fi

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

# Parse Command-line Arguments

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

declare -x TCAR_MODULE_NAME=''

declare -x TCAR_MODULE_ARGUMENT=''

declare -x TCAR_SCRIPT_ARGUMENT=''

# Retrieve module's name using the first argument of tcar.sh

# script as reference.

if [[ ! ${1} =~ '^-' ]];then

    TCAR_MODULE_NAME="${1}"; shift 1

else

    TCAR_MODULE_NAME=""

fi

# Initialize tcar.sh script specific options. The way tcar.sh script

# retrieves its options isn't as sophisticated (e.g., it doesn't

# provide valid-option verifications) as it is provided by getopt

# command. I cannot use getopt here because it is used already when

# loading module-specific options. Using more than one invocation of

# getopt in the same script is not possible (e.g., one of the

# invocations may enter in conflict with the other one when different

# option definitions are expected in the command-line.)

while true; do

    # Store non-option arguments passed to tcar.sh script.

    if [[ ! ${1} =~ '^-' ]];then

        TCAR_SCRIPT_ARGUMENT="${1} ${TCAR_SCRIPT_ARGUMENT}"

        shift 1

        if [[ $# -gt 0 ]];then

            continue

        else

            break

        fi

    fi

    case "${1}" in

        --help )

            if [[ -z ${TCAR_MODULE_NAME} ]];then

                tcar_printHelp

            else

                # Store the argument for further processing inside the

                # module environment that will be executed later.

                TCAR_MODULE_ARGUMENT="-g ${1} ${TCAR_MODULE_ARGUMENT}"

                shift 1

            fi

            ;;

        --version )

            if [[ -z ${TCAR_MODULE_NAME} ]];then

                tcar_printVersion

            else

                TCAR_MODULE_ARGUMENT="-g ${1} ${TCAR_MODULE_ARGUMENT}"

                shift 1

            fi

            ;;

        --quiet )

            TCAR_FLAG_QUIET='true'

            shift 1

            ;;

        --yes )

            TCAR_FLAG_YES='true'

            shift 1

            ;;

        --debug )

            TCAR_FLAG_DEBUG='true'

            shift 1

            ;;

        * ) 

            # Store module-specific option arguments. This is, all

            # arguments not considered part of tcar.sh script

            # itself. The module-specific option arguments are passed,

            # later, to getopt for option processing, inside the

            # module-specific environments.

            TCAR_MODULE_ARGUMENT="-g ${1} ${TCAR_MODULE_ARGUMENT}"

            shift 1

            if [[ $# -gt 0 ]];then

                continue

            else

                break

            fi

            ;;

    esac

done

# Initiate module-specific environment.

tcar_setModuleEnvironment -m "${TCAR_MODULE_NAME}" ${TCAR_MODULE_ARGUMENT} ${TCAR_SCRIPT_ARGUMENT}

# At this point everything has been done without errors. So, exit

# tcar.sh script successfully.

exit 0