# -*- mode: shell-script; indent-tabs-mode: nil; -*-
#:
#: :Author:    Franz Glasner
#: :Copyright: (c) 2017-2024 Franz Glasner.
#:             All rights reserved.
#: :License:   BSD 3-Clause "New" or "Revised" License.
#:             See LICENSE for details.
#:             If you cannot find LICENSE see
#:             <https://opensource.org/licenses/BSD-3-Clause>
#: :ID:        @(#)@@SIMPLEVERSIONTAG@@
#:


#:
#: Ensure that no command line options are given
#:
#: Args:
#:   $@:
#:
#: Exit:
#:   2: If formally `getopts` finds options in "$@"
#:
#: Return:
#:   - 0
#:
_ensure_no_options() {
    local _opt

    while getopts ":" _opt ; do
        [ "${_opt}" = '?' ] && { echo "ERROR: no option allowed" 1>&2; exit 2; }
    done
    return 0
}


#:
#: Determine some important dataset properties that are set locally
#:
#: Args:
#:   $1: the dataset
#:   $2 ...: the properties to check for
#:
#: Output (stdout):
#:   An option string suited for use in "zfs create"
#:
_get_local_zfs_properties_for_create() {
    local ds

    local _res _prop _value _source

    ds="${1}"
    shift

    _res=""

    for _prop in "$@" ; do
        IFS=$'\t' read -r _value _source <<EOF73GHASGJKKJ354
$(zfs get -H -p -o value,source "${_prop}" "${ds}")
EOF73GHASGJKKJ354
        case "${_source}" in
            local)
                if [ -z "${_res}" ]; then
                    _res="-o ${_prop}=${_value}"
                else
                    _res="${_res} -o ${_prop}=${_value}"
                fi
                ;;
            *)
                # VOID
                ;;
        esac
    done
    echo "${_res}"
}