| # Copyright 2022 gRPC authors. |
| # |
| # 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. |
| """The module contains helpers to initialize and configure logging.""" |
| import functools |
| import pathlib |
| |
| from absl import flags |
| from absl import logging |
| |
| |
| def _ensure_flags_parsed() -> None: |
| if not flags.FLAGS.is_parsed(): |
| raise flags.UnparsedFlagAccessError('Must initialize absl flags first.') |
| |
| |
| @functools.lru_cache(None) |
| def log_get_root_dir() -> pathlib.Path: |
| _ensure_flags_parsed() |
| log_root = pathlib.Path(logging.find_log_dir()).absolute() |
| logging.info("Log root dir: %s", log_root) |
| return log_root |
| |
| |
| def log_dir_mkdir(name: str) -> pathlib.Path: |
| """Creates and returns a subdir with the given name in the log folder.""" |
| if len(pathlib.Path(name).parts) != 1: |
| raise ValueError(f'Dir name must be a single component; got: {name}') |
| if ".." in name: |
| raise ValueError(f'Dir name must not be above the log root.') |
| log_subdir = log_get_root_dir() / name |
| if log_subdir.exists() and log_subdir.is_dir(): |
| logging.debug("Using existing log subdir: %s", log_subdir) |
| else: |
| log_subdir.mkdir() |
| logging.debug("Created log subdir: %s", log_subdir) |
| |
| return log_subdir |