#!/usr/bin/python3
# -*- coding: utf-8 -*-
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""Utility tasks for the local filesystem
"""
import luigi
import luigi.contrib.hdfs


class EnsureExistsOnLocalFilesystemTask(luigi.ExternalTask):

    description = "Ensure a file/dir exists on the local filesystem"

    path = luigi.Parameter()

    def output(self):
        return luigi.LocalTarget(self.path)

    def run(self):
        raise FileNotFoundError("{path}: does not exist on the local filesystem (it should).".format(path=self.path))
