#!/bin/bash

#

# cli_getPathComponent.sh -- This function outputs different parts

# from path string. By default the full release information is output.

#

# Copyright (C) 2009-2011 Alain Reguera Delgado

# 

# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307

# USA.

# 

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

# $Id$

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

function cli_getPathComponent {

    local -a PATTERN

    local RELEASE=''

    # Define release pattern.

    PATTERN[0]="(([[:digit:]]+)(\.([[:digit:]]+)){,1})"

    # Define architecture pattern.

    PATTERN[1]='(i386|x86_64)'

    # Identify which part of the release we want to output.

    case "$2" in

        '--arch' )

            RELEASE=$(echo "$1" | sed -r "s!.+/${PATTERN[0]}/${PATTERN[1]}/.+!\5!")

            ;;

        '--major-release' )

            RELEASE=$(echo "$1" | sed -r "s!.+/${PATTERN[0]}/.+!\2!")

            ;;

        '--minor-release' )

            RELEASE=$(echo "$1" | sed -r "s!.+/${PATTERN[0]}/.+!\4!")

            ;;

        '--verify-release' )

            # Verify release value against release pattern.

            if [[ ! $RELEASE =~ "^${PATTERN}$" ]];then

                cli_printMessage "`gettext "The release number \\\`\\\$RELEASE' is not valid."`" 'AsErrorLine'

                cli_printMessage "$(caller)" 'AsToKnowMoreLine'

            fi

            ;;

        '--release-pattern' )

            RELEASE=$(echo ${PATTERN[0]})

            ;;

        '--arch-pattern' )

            RELEASE=$(echo ${PATTERN[1]})

            ;;

        '--full-release' | * )

            # Define absolute path from which relase information is retrived.

            # As convenction, we use the first coincidence that match release

            # pattern.

            RELEASE=$(echo "$1" | sed -r "s!.+/${PATTERN[0]}/.+!\1!" )

            ;;

    esac

    # If no release information is found in the provided absolute

    # path, use zero as default release information.

    if [[ ! "$RELEASE" =~ "$PATTERN" ]];then

        RELEASE='0'

    fi

    # Output release information.

    echo "$RELEASE"

}