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Previously we set loglevel >= WARNING printed to stderr and loglevel < WARNING printed to stdout. To be more flexible, we replace this `WARNING` value with an argument: split_level and leave `WARNING` as default split_level if not set. Signed-off-by: Yanray Wang <yanray.wang@arm.com>
58 lines
2.0 KiB
Python
58 lines
2.0 KiB
Python
"""Auxiliary functions used for logging module.
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"""
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# Copyright The Mbed TLS Contributors
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# SPDX-License-Identifier: Apache-2.0
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import sys
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def configure_logger(
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logger: logging.Logger,
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log_format="[%(levelname)s]: %(message)s",
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split_level=logging.WARNING
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) -> None:
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"""
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Configure the logging.Logger instance so that:
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- Format is set to any log_format.
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Default: "[%(levelname)s]: %(message)s"
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- loglevel >= split_level are printed to stderr.
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- loglevel < split_level are printed to stdout.
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Default: logging.WARNING
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"""
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class MaxLevelFilter(logging.Filter):
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# pylint: disable=too-few-public-methods
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def __init__(self, max_level, name=''):
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super().__init__(name)
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self.max_level = max_level
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def filter(self, record: logging.LogRecord) -> bool:
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return record.levelno <= self.max_level
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log_formatter = logging.Formatter(log_format)
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# set loglevel >= split_level to be printed to stderr
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stderr_hdlr = logging.StreamHandler(sys.stderr)
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stderr_hdlr.setLevel(split_level)
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stderr_hdlr.setFormatter(log_formatter)
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# set loglevel < split_level to be printed to stdout
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stdout_hdlr = logging.StreamHandler(sys.stdout)
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stdout_hdlr.addFilter(MaxLevelFilter(split_level - 1))
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stdout_hdlr.setFormatter(log_formatter)
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logger.addHandler(stderr_hdlr)
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logger.addHandler(stdout_hdlr)
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