#!/bin/bash
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | www.openfoam.com
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
#     Copyright (C) 2019-2020 OpenCFD Ltd.
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
#
# Script
#     foamExec <application> ...
#
# Description
#     Runs an application (with arguments) after first sourcing the OpenFOAM
#     etc/bashrc file from the project directory
#
#     Can useful for parallel runs. For example,
#
#     mpirun -n <nProcs> \
#         projectDir/bin/tools/foamExec <simpleFoam> ... -parallel
#
# Note
#     This script normally exists in the project 'bin/tools' directory.
#     Do not copy/move/link to other locations unless you also edit it!
#
#------------------------------------------------------------------------------
toolsDir="${0%/*}"                                  # The bin/tools dir
projectDir="${toolsDir%/bin/tools}"                 # Project dir

printHelp() {
    cat<<USAGE

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

options:
  -help             Print the usage

Run an application (with arguments) after first sourcing
the OpenFOAM etc/bashrc file from the project directory:
($projectDir)

USAGE
    exit 0 # A clean exit
}

# 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
}

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

# Parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help*)
        printHelp
        ;;
    --)
        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 "$@"

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