#!/bin/bash
#------------------------------------------------------------------------------
# =========                 |
# \\      /  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
#     foamExec <application> ...
#
# Description
#     Runs an application (with arguments) after first sourcing the OpenFOAM
#     etc/bashrc file from the project directory
#
#     This script must exist in $WM_PROJECT_DIR/bin/tools
#
#     Can useful for parallel runs. For example,
#
#     mpirun -n <nProcs> \
#         projectDir/bin/tools/foamExec <simpleFoam> ... -parallel
#
#------------------------------------------------------------------------------
usage() {
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE

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

options:
  -help             Print the usage

Runs an application (with arguments) after first sourcing the OpenFOAM
etc/bashrc file from the project directory

USAGE
    exit 1
}

# Report error and exit
die()
{
    exec 1>&2
    echo
    echo "Error encountered:"
    while [ "$#" -ge 1 ]; do echo "    $1"; shift; done
    echo
    echo "See '$0 -help' for usage"
    echo
    exit 1
}

#-------------------------------------------------------------------------------
toolsDir="${0%/*}"                                  # The bin/tools dir
projectDir="${toolsDir%/bin/tools}"                 # Project dir

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

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

[ "$#" -ge 1 ] || die "No application specified"

[ -d "$projectDir" ] || {
    echo "Error: no project dir: $projectDir" 1>&2
    exit 2
}

[ -f "$projectDir/etc/bashrc" ] || {
    echo "Error: file not found: $projectDir/etc/bashrc" 1>&2
    exit 2
}


# Source bashrc within a function to preserve command-line arguments
# - this will not have aliases, but working non-interactively anyhow
sourceBashrc()
{
    . "$projectDir/etc/bashrc" $FOAM_SETTINGS
}

sourceBashrc
exec "$@"

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