#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright (C) 2015-2017 OpenFOAM Foundation
#    \\/     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
#     foamCloneCase
#
# Description
#     Create a new case directory that includes time, system and constant
#     directories from a source case.
#     The time directory is the first time directory by default
#     - requires foamListTimes v2.3.x and newer
#
#------------------------------------------------------------------------------
usage() {
    cat<<USAGE

Usage: ${0##*/} [OPTION] <source case> <target name>
options:
  -latestTime    clone the latest time directory
  -help          print the usage

Create a new <targetCase> case directory that includes time, system and constant
directories of <sourceCase> directory.
The time directory is the first time directory by default.

USAGE
}

error() {
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    usage
    exit 1
}

time_option="head -1"

# parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help)
        usage && exit 0
        ;;
    -l | -latestTime)
        time_option="tail -1"
        shift 1
        ;;
    -*)
        error "unknown option: '$*'"
        ;;
    *)
        break
        ;;
    esac
done

[ $# -eq 2 ] || error "Incorrect arguments specified"
foamListTimes -case "$1" >/dev/null 2>&1 || \
    error "'$1' is not a valid case directory"

! [ -e "$2" ] || error "'$2' file/directory already exists, delete and re-run"

echo "Making $2 case directory"
mkdir "$2"

time_dir="$(foamListTimes -withZero -case "$1" | $time_option)"

echo "Copying case directories from $1 to $2"
cp -r "$1"/system "$1"/constant "$1"/"${time_dir}" "$2"

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