#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright (C) 2019 OpenCFD Ltd.
#    \\/     M anipulation  |
#-------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM.
#
#     OpenFOAM 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.
#
#     OpenFOAM 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 OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
#
# Script
#     wmakeRoot
#
# Description
#     Locate the root directory that has a Make/ directory.
#
# See Also
#     wmake
#
#------------------------------------------------------------------------------
Script="${0##*/}"           # Use 'Script' for error messages in wmakeFunctions
. "${0%/*}/scripts/wmakeFunctions"              # Source wmake functions

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

Usage: $Script [OPTION] [dir]

options:
  -h | -help        Print the usage

Locate the root directory that has a Make/ directory.

USAGE
    exit 1
}

#------------------------------------------------------------------------------
# Parse arguments and options
#------------------------------------------------------------------------------

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

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

unset dir

if [ $# -ge 1 ]
then
    if [ -d "$1" ]
    then
        dir="${1%/}"
    elif [ -f "$1" ]
    then
        dir="${1%/*}"
        : "${dir:=.}"
    else
        echo "$Script error: not a file or directory" 1>&2
        exit 1
    fi

    cd "$dir" 2>/dev/null || {
        echo "$Script error: could not change to directory '$dir'" 1>&2
        exit 1
    }
fi


# Locate target with Make/ directory

if dir="$(findTarget .)"
then
    (cd "$dir" && pwd -L)
else
    exit 2
fi


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