#!/bin/bash

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

#

#   tcar_setModuleEnvironmentScripts.sh -- This function standardizes

#   the way specific functionalities are exported to tcar.sh

#   script environment.

#

#   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_setModuleEnvironmentScripts {

    # Define the pattern used to retrieve function names from function

    # files.

    local FUNCTION_PATTERN="^function[[:space:]]+${TCAR_MODULE_NAME}(_[[:alnum:]]+)?[[:space:]]+{[[:space:]]*$"

    # Define the list of files.

    local TCAR_MODULE_SCRIPT=''

    local TCAR_MODULE_SCRIPTS="${TCAR_MODULE_INIT_FILE}"

    if [[ -d ${TCAR_MODULE_DIR} ]];then

        TCAR_MODULE_SCRIPTS="${TCAR_MODULE_SCRIPTS}

            $(tcar_getFilesList ${TCAR_MODULE_DIR} \

            --pattern="${TCAR_MODULE_DIR}/${TCAR_MODULE_NAME}_[[:alnum:]]+\.sh$" --type='f')"

    fi

    # Verify the list of files. If no function file exists for the

    # location specified stop the script execution. Otherwise the

    # script will surely try to execute a function that haven't been

    # exported yet and report an error about it.

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

        tcar_printMessage "${FUNCNAME}: `gettext "No function file was found."`" --as-error-line

    fi

    # Process the list of files.

    for TCAR_MODULE_SCRIPT in ${TCAR_MODULE_SCRIPTS};do

        # Verify the execution rights for function file.

        tcar_checkFiles -ex ${TCAR_MODULE_SCRIPT}

        # Retrieve the function's name from function's file.

        local TCAR_MODULE_SCRIPT_FN=$(egrep "${FUNCTION_PATTERN}" ${TCAR_MODULE_SCRIPT} \

            | gawk '{ print $2 }')

        # Verify function's name. It cannot be an empty value.

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

            tcar_printMessage "`gettext "No function definition found."`" --as-error-line

        fi

        # Verify that function files have not been already exported.

        # If they have been already exported don't export them again.

        # Instead, continue with the next function file in the list.

        declare -F | gawk '{ print $3 }' | egrep "^${TCAR_MODULE_SCRIPT}$" > /dev/null

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

            continue

        fi

        # Initialize the function file.

        . ${TCAR_MODULE_SCRIPT}

        # Export the function names inside the file to current shell

        # script environment.

        export -f ${TCAR_MODULE_SCRIPT_FN}

        tcar_printMessage "export -f : ${TCAR_MODULE_SCRIPT_FN}" --as-debugger-line

    done

}