#!/bin/bash

#

# cli_exportFunctions.sh -- This function standardizes the way

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

# environment.

#

# Copyright (C) 2009, 2010, 2011, 2012 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.

#

# ----------------------------------------------------------------------

# $Id$

# ----------------------------------------------------------------------

function cli_exportFunctions {

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

    local EXPORTID="$1"

    # Verify the export identification existence. This argument must

    # be passed as first argument and match a relative path format.

    if [[ ! $EXPORTID ]] || [[ $EXPORTID == '' ]];then

        cli_printMessage "`gettext "The export id must be passed as first argument."`" --as-error-line

    elif [[ ! $EXPORTID =~ '^[A-Z][[:alpha:]]+(/[[:alpha:]_]+)+$' ]];then

        cli_printMessage "`gettext "The export id doesn't match its pattern."`" --as-error-line

    fi

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

    local LOCATION=${CLI_BASEDIR}/Functions/$(dirname ${EXPORTID})

    # Define suffix used to retrieve function files.

    local SUFFIX=$(basename "$EXPORTID")

    # Verify the suffix value used to retrieve function files.

    # Assuming no suffix value is passed as second argument to this

    # function, use the function name value (CLI_FUNCNAME) as default

    # value.

    if [[ $SUFFIX == '' ]];then

        SUFFIX="${CLI_FUNCNAME}"

    fi

    # Redefine suffix to match all related function files inside the

    # related function directory.

    SUFFIX=${SUFFIX}'[[:alpha:]_]*'

    # Define the pattern used to retrieve function names from function

    # files.

    local PATTERN="^function[[:space:]]+${SUFFIX}[[:space:]]+{[[:space:]]*$"

    # Define the list of files.

    local FUNCFILE=''

    local FUNCFILES=$(cli_getFilesList ${LOCATION} --pattern="${SUFFIX}\.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 [[ $FUNCFILES == '' ]];then

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

    fi

    # Process the list of files.

    for FUNCFILE in $FUNCFILES;do

        # Verify the execution rights for function file.

        cli_checkFiles -x ${FUNCFILE}

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

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

            continue

        fi

        # Initialize the function file.

        . ${FUNCFILE}

        # Export the function names inside the file to current shell

        # script environment.

        export -f $(egrep "${PATTERN}" ${FUNCFILE} | gawk '{ print $2 }')

    done

}