#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | foam-extend: Open Source CFD
#  \\    /   O peration     | Version:     4.1
#   \\  /    A nd           | Web:         http://www.foam-extend.org
#    \\/     M anipulation  | For copyright notice see file Copyright
#------------------------------------------------------------------------------
# License
#     This file is part of foam-extend.
#
#     foam-extend 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 3 of the License, or (at your
#     option) any later version.
#
#     foam-extend 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 foam-extend.  If not, see <http://www.gnu.org/licenses/>.
#
# Script
#     wmakeCheckPwd
#
# Description
#     Check that the current working directory is equal to a particular
#     target directory, resolving the absolute path as required
#
#------------------------------------------------------------------------------
unset quietOpt

usage() {
    [ "$quietOpt" = true ] && exit 1
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE

usage: ${0##*/} [OPTION] dirName

options:
  -q | -quiet   suppress all normal output

  Check that the current working directory is equal to a particular
  target directory, resolving the absolute path as required

  Exit status 0 when the directories are identical
  Exit status 1 on error

USAGE
    exit 1
}


# parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help)
        usage
        ;;
    -q | -quiet)
        quietOpt=true
        shift
        ;;
    -*)
        usage "unknown option: '$*'"
        ;;
    *)
        break
        ;;
    esac
done


[ "$#" -eq 1 ] || usage
dirName="$1"


# trivial checks first
[ "$PWD" = "$dirName" ] && exit 0

[ -d "$dirName" ] || {
    [ "$quietOpt" = true ] || echo "Error: Directory does not exist $dirName"
    exit 1
}


# use /bin/pwd to get the absolute path (could be linked)
thisDir=$(/bin/pwd)
target=$(cd $dirName 2>/dev/null && /bin/pwd)

# okay
[ "$thisDir" = "$target" ] && exit 0

# some other error
[ "$quietOpt" = true ] || echo "Error: Current directory is not $dirName"
exit 1

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