transfer.py

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# This file is part of daf_butler.
#
# Developed for the LSST Data Management System.
# This product includes software developed by the LSST Project
# (http://www.lsst.org).
# See the COPYRIGHT file at the top-level directory of this distribution
# for details of code ownership.
#
# This program 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.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
import click
 
allowed_types = ["auto", "link", "symlink", "hardlink", "copy", "move", "relsymlink"]
 
 
class transfer_option:  # noqa: N801
    def __init__(self, required=False, help=None):
        self.required = required
        self.help = "The external data transfer mode." if help is None else help
 
    def __call__(self, f):
        return click.option("-t", "--transfer",
                            default="auto",
                            type=click.Choice(allowed_types),
                            required=self.required,
                            help=self.help)(f)