1# Copyright 2023 The Bazel Authors. All rights reserved. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15"""A small library for common arguments when updating files.""" 16 17import pathlib 18 19from python.runfiles import runfiles 20 21 22def path_from_runfiles(input: str) -> pathlib.Path: 23 """A helper to create a path from runfiles. 24 25 Args: 26 input: the string input to construct a path. 27 28 Returns: 29 the pathlib.Path path to a file which is verified to exist. 30 """ 31 path = pathlib.Path(runfiles.Create().Rlocation(input)) 32 if not path.exists(): 33 raise ValueError(f"Path '{path}' does not exist") 34 35 return path 36