#!/bin/bash
#
# texinfo.sh -- This function initilializes the Texinfo documentation
# backend used by centos-art.sh script to produce and maintain Texinfo
# documentation manuals inside the working copy of The CentOS Artwork
# Repository.
#
# Copyright (C) 2009, 2010, 2011 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.
#
# ----------------------------------------------------------------------
# $Id$
# ----------------------------------------------------------------------
    
function texinfo {

    # Define file extension used by source files inside manuals.
    MANUAL_EXTENSION='texinfo'

    # Verify existence of action names. When no action name is
    # provided to centos-art.sh script, read manual's output in info
    # format in order to provide a way for people to get oriented
    # about The CentOS Artwork Repository and its automation tool, the
    # centos-art.sh script. Be sure the manual's output file does
    # exist and terminate the script execution once the reading is
    # done.
    if [[ $ACTIONNAM == '' ]];then

        # Verify existence of manual's output in info format.
        cli_checkFiles ${MANUAL_BASEFILE}.info.bz2

        # Read Top node from manual's output in info format.
        /usr/bin/info --node="Top" --file=${MANUAL_BASEFILE}.info.bz2

        # Terminate script execution right here.
        exit

    fi

    # Define absolute path to chapter's directory. This is the place
    # where chapter-specific files are stored in.
    MANUAL_CHAPTER_DIR=${MANUAL_BASEDIR_L10N}/$(cli_getRepoName \
        "${MANUAL_CHAPTER_NAME}" -d | tr -d ' ' | sed -r 's!/$!!')

    # Define absolute path to template directory. This is the place
    # where we store locale directories (e.g., en_US, es_ES, etc.)
    # used to build manuals in texinfo format.
    MANUAL_TEMPLATE=${FUNCDIR}/${FUNCDIRNAM}/$(cli_getRepoName \
        ${FLAG_BACKEND} -d)/Templates

    # Define absolute path to language-specific template directory.
    # This is the place where we store locale-specific files used to
    # build manuals in texinfo format.
    MANUAL_TEMPLATE_L10N=${MANUAL_TEMPLATE}/${MANUAL_L10N}

    # Verify absolute path to language-speicific template directory.
    # If it doesn't exist, use English language as default location to
    # retrive template files.
    if [[ ! -d $MANUAL_TEMPLATE_L10N ]];then
        MANUAL_TEMPLATE_L10N=${MANUAL_TEMPLATE}/en_US
    fi

    # Initialize document structure of new manuals.
    ${FLAG_BACKEND}_createStructure

    # Execute action names. Notice that we've separated action name
    # execution in order to control and save the differences among
    # them. For example, there are action names that need a fixed
    # amount of non-option arguments (e.g., when we rename or copy
    # documentation entries); but there are other action names that
    # have no restriction in the amount of non-option arguments that
    # can be provided to it (e.g., when we edit, read or delete
    # documentation entries).
    if [[ $ACTIONNAM =~ "^(copy|rename)Entry$" ]];then

        # Execute backend action names that may need to use more than
        # one action value.
        ${FLAG_BACKEND}_${ACTIONNAM}

        # Rebuild output files to propagate recent changes.
        ${FLAG_BACKEND}_updateOutputFiles

        # Commit changes from working copy to central repository only.
        # At this point, changes in the repository are not merged in
        # the working copy, but chages in the working copy do are
        # committed up to repository.
        cli_commitRepoChanges ${MANUAL_BASEDIR}

        # Terminate script execution right here.
        exit

    elif [[ $ACTIONNAM =~ "^(searchIndex|updateOutputFiles)$" ]];then

        # Execute backend action names which don't require non-option
        # arguments to be passed at all, in order for them to do their
        # work.
        ${FLAG_BACKEND}_${ACTIONNAM}

        # Terminate script execution right here.
        exit

    else

        # Define documentation entry. To build the documentation
        # entry, we combine the manual's name, the chapter's name and
        # the section name retrived from the command-line.
        if [[ $MANUAL_CHAPTER_NAME == '' ]];then

            # When chapter option is not provided, discard the section
            # name and define documentation entry based on manual's
            # main definition file.
            MANUAL_ENTRY="${MANUAL_BASEFILE}.${MANUAL_EXTENSION}"

        elif [[ $MANUAL_CHAPTER_NAME != '' ]] && [[ $MANUAL_SECTION_NAME == '' ]];then

            # When chapter option is provided whith out a section
            # name, verify chapter's directory inside the manual,
            ${FLAG_BACKEND}_createChapter

            # and define documentation entry based on chapter's main
            # definition file.
            MANUAL_ENTRY="${MANUAL_BASEDIR_L10N}/${MANUAL_CHAPTER_NAME}/chapter.${MANUAL_EXTENSION}"

        elif [[ $MANUAL_CHAPTER_NAME != '' ]] && [[ $MANUAL_SECTION_NAME != '' ]];then

            # When both the chapter option and non-option arguments
            # are provided, define documentation entries based on
            # manual, chapter and non-option arguments.
            MANUAL_ENTRY="$(${FLAG_BACKEND}_getEntry "$MANUAL_SECTION_NAME")"

        else
            cli_printMessage "`gettext "The parameters you provided are not supported."`" --as-error-line
        fi

        # Execute action name on documentation entry.
        ${FLAG_BACKEND}_$ACTIONNAM

    fi

}