#!/bin/bash

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

#

#   tcar_printHelp.sh -- This function standardizes the way

#   centos-art.sh script prints help about itself.

#

#   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_printHelp {

    # Retrieve the man page name. This is the file name you want to retrieve

    # documentation for. This value is optional. When it is not passed, the

    # module name is used. 

    local TCAR_MANPAGE_NAME="${1:-${TCAR_MODULE_NAME}}"

    # When the module name has not been set and the tcar_printHelp

    # function is called from centos-art.sh file, the page name come

    # with with --help as opening string and probably as

    # --help=filename.sh. In the first case it prints the script

    # documentation. In the second case it prints documentation for

    # the file specified.

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

        if [[ ${TCAR_MANPAGE_NAME} =~ '^--help=[[:alnum:]_-.]+' ]];then

            TCAR_MANPAGE_NAME=$(echo ${TCAR_MANPAGE_NAME} | cut -d'=' -f2)

        else

            TCAR_MANPAGE_NAME=${TCAR_SCRIPT_NAME}

        fi

    fi

    # Print requested documentation. 

    /usr/bin/man -M ${TCAR_SCRIPT_DIR_MANUALS}:${TCAR_MODULE_DIR_MANUALS} "${TCAR_MANPAGE_NAME}"

    # Finish script execution successfully.

    exit 0

}