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313581e4e9
* Pull runtime dep checks into their own module * Reimplement `check_requirements` using `importlib` I've tried to make this clearer. We start by working out which of Synapse's requirements we need to be installed here and now. I was surprised that there wasn't an easier way to see which packages were installed by a given extra. I've pulled out the error messages into functions that deal with "is this for an extra or not". And I've rearranged the loop over two different sets of requirements into one loop with a "must be instaled" flag. I hope you agree that this is clearer. * Test cases
54 lines
1.8 KiB
Python
54 lines
1.8 KiB
Python
# Copyright 2014-2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may 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,
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# WITHOUT 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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from typing import Container
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from synapse.util import check_dependencies
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logger = logging.getLogger(__name__)
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try:
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check_dependencies.check_requirements()
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except check_dependencies.DependencyException as e:
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sys.stderr.writelines(
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e.message # noqa: B306, DependencyException.message is a property
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)
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sys.exit(1)
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def check_bind_error(
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e: Exception, address: str, bind_addresses: Container[str]
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) -> None:
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"""
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This method checks an exception occurred while binding on 0.0.0.0.
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If :: is specified in the bind addresses a warning is shown.
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The exception is still raised otherwise.
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Binding on both 0.0.0.0 and :: causes an exception on Linux and macOS
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because :: binds on both IPv4 and IPv6 (as per RFC 3493).
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When binding on 0.0.0.0 after :: this can safely be ignored.
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Args:
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e: Exception that was caught.
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address: Address on which binding was attempted.
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bind_addresses: Addresses on which the service listens.
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"""
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if address == "0.0.0.0" and "::" in bind_addresses:
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logger.warning(
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"Failed to listen on 0.0.0.0, continuing because listening on [::]"
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)
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else:
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raise e
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