#!/bin/bash

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

#

#   tcar_exportFunctions.sh -- This function standardizes the way

#   specific functionalities are exported to centos-art.sh script

#   environment.

#

#   Written by: 

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

#     Key fingerprint = D67D 0F82 4CBD 90BC 6421  DF28 7CCE 757C 17CA 3951

#

# Copyright (C) 2009-2013 The CentOS Project

#

# 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_exportFunctions {

    # Retrieve export identifier for the function we want to export.

    local MODULE_INIT_FILE="${1}"

    # Verify the export identification existence.

    tcar_checkFiles -x ${MODULE_INIT_FILE}

    # Define the source location where function files are placed in.

    local MODULE_SCRIPTS_DIR=$(dirname ${MODULE_INIT_FILE})/Scripts

    # Define suffix used to retrieve function files.

    local MODULE_INIT_FILENAME=$(basename "${MODULE_INIT_FILE}" | sed -r 's/\.sh$//')

    # Define the pattern used to retrieve function names from function

    # files.

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

    # Define the list of files.

    local MODULE_SCRIPTS="${MODULE_INIT_FILE}

        $(tcar_getFilesList ${MODULE_SCRIPTS_DIR} \

        --pattern="${MODULE_DIR}/.+\.sh$" --maxdepth='1' \

        --mindepth='1' --type='f')"

    # 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 ${MODULE_SCRIPTS} ]];then

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

    fi

    # Process the list of files.

    for MODULE_SCRIPT in ${MODULE_SCRIPTS};do

        # Verify the execution rights for function file.

        tcar_checkFiles -x ${MODULE_SCRIPT}

        # 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 $3 }' | egrep "^${MODULE_SCRIPT}$" > /dev/null

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

            continue

        fi

        # Initialize the function file.

        . ${MODULE_SCRIPT}

        # Export the function names inside the file to current shell

        # script environment.

        export -f $(egrep "${FUNCTION_PATTERN}" ${MODULE_SCRIPT} | gawk '{ print $2 }')

    done

}