#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright held by original author
#    \\/     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 2 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, write to the Free Software Foundation,
#     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
# Script
#     foamExec
#
# Description
#     Usage: foamExec [-v foamVersion] <foamCommand> ...
#
#     Runs the <foamVersion> version of executable <foamCommand>
#     with the rest of the arguments.
#
#     Can also be used for parallel runs e.g.
#     mpirun -np <nProcs> \
#         foamExec -v <foamVersion> <foamCommand> ... -parallel
#
#------------------------------------------------------------------------------
Script=${0##*/}

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

usage: ${0##*/} [OPTION] <application> ...

options:
  -v ver        specify OpenFOAM version
  -help         this usage

* run a particular OpenFOAM version of <application>

USAGE
    exit 1
}


# This script should exist in <foamInstall>/OpenFOAM-<VERSION>/bin/
# extract the <foamInstall> and <version> elements
# using a function preserves the command args
getDefaults() {
    set -- $(echo $0 | sed -e 's@/OpenFOAM-\([^/]*\)/bin/[^/]*$@ \1@')
    foamInstall=$1
    version=$2
}

getDefaults

# parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help)
        usage
        ;;
    -v)
        shift
        version=$1
        shift
        ;;
    --)
        shift
        break
        ;;
    -*)
        usage "invalid option '$1'"
        ;;
    *)
        break
        ;;
    esac
done

if [ "$#" -lt 1 ]
then
    usage "no application specified"
fi

unset foamDotFile

# Check user-specific OpenFOAM bashrc file
foamDotFile="$HOME/.OpenFOAM/$version/bashrc"
if [ -f $foamDotFile ]
then
    . $foamDotFile
    foamDotFile=okay
else
    # Use the FOAM_INST_DIR variable for locating the installed version
    for FOAM_INST_DIR in $foamInstall $WM_PROJECT_INST_DIR
    do
        foamDotFile="$FOAM_INST_DIR/OpenFOAM-$version/etc/bashrc"
        if [ -f $foamDotFile ]
        then
            . $foamDotFile
            foamDotFile=okay
            break
        fi
    done
fi


if [ "$foamDotFile" != okay ]
then
    echo "Error : bashrc file could not be found for OpenFOAM-$version" 1>&2
    exit 1
fi

# Pass on the rest of the arguments
exec $*

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