mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-12-27 02:59:25 -05:00
5a709630bf
I don't really remember why this was so complicated; I think it dates back to the time when we had to instantiate the Config classes before we could call `add_arguments` - ie before #5597. In any case, I don't think there's a good reason for it any more, and the impact of it being complicated is that `--help` doesn't work correctly.
717 lines
24 KiB
Python
717 lines
24 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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# Copyright 2017-2018 New Vector Ltd
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# Copyright 2019 The Matrix.org Foundation C.I.C.
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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 argparse
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import errno
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import os
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from collections import OrderedDict
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from textwrap import dedent
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from typing import Any, MutableMapping, Optional
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from six import integer_types
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import yaml
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class ConfigError(Exception):
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pass
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# We split these messages out to allow packages to override with package
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# specific instructions.
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MISSING_REPORT_STATS_CONFIG_INSTRUCTIONS = """\
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Please opt in or out of reporting anonymized homeserver usage statistics, by
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setting the `report_stats` key in your config file to either True or False.
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"""
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MISSING_REPORT_STATS_SPIEL = """\
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We would really appreciate it if you could help our project out by reporting
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anonymized usage statistics from your homeserver. Only very basic aggregate
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data (e.g. number of users) will be reported, but it helps us to track the
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growth of the Matrix community, and helps us to make Matrix a success, as well
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as to convince other networks that they should peer with us.
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Thank you.
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"""
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MISSING_SERVER_NAME = """\
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Missing mandatory `server_name` config option.
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"""
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CONFIG_FILE_HEADER = """\
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# Configuration file for Synapse.
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#
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# This is a YAML file: see [1] for a quick introduction. Note in particular
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# that *indentation is important*: all the elements of a list or dictionary
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# should have the same indentation.
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#
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# [1] https://docs.ansible.com/ansible/latest/reference_appendices/YAMLSyntax.html
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"""
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def path_exists(file_path):
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"""Check if a file exists
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Unlike os.path.exists, this throws an exception if there is an error
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checking if the file exists (for example, if there is a perms error on
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the parent dir).
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Returns:
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bool: True if the file exists; False if not.
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"""
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try:
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os.stat(file_path)
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return True
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except OSError as e:
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if e.errno != errno.ENOENT:
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raise e
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return False
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class Config(object):
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"""
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A configuration section, containing configuration keys and values.
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Attributes:
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section (str): The section title of this config object, such as
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"tls" or "logger". This is used to refer to it on the root
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logger (for example, `config.tls.some_option`). Must be
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defined in subclasses.
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"""
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section = None
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def __init__(self, root_config=None):
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self.root = root_config
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def __getattr__(self, item: str) -> Any:
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"""
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Try and fetch a configuration option that does not exist on this class.
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This is so that existing configs that rely on `self.value`, where value
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is actually from a different config section, continue to work.
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"""
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if item in ["generate_config_section", "read_config"]:
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raise AttributeError(item)
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if self.root is None:
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raise AttributeError(item)
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else:
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return self.root._get_unclassed_config(self.section, item)
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@staticmethod
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def parse_size(value):
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if isinstance(value, integer_types):
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return value
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sizes = {"K": 1024, "M": 1024 * 1024}
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size = 1
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suffix = value[-1]
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if suffix in sizes:
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value = value[:-1]
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size = sizes[suffix]
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return int(value) * size
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@staticmethod
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def parse_duration(value):
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if isinstance(value, integer_types):
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return value
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second = 1000
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minute = 60 * second
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hour = 60 * minute
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day = 24 * hour
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week = 7 * day
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year = 365 * day
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sizes = {"s": second, "m": minute, "h": hour, "d": day, "w": week, "y": year}
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size = 1
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suffix = value[-1]
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if suffix in sizes:
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value = value[:-1]
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size = sizes[suffix]
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return int(value) * size
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@staticmethod
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def abspath(file_path):
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return os.path.abspath(file_path) if file_path else file_path
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@classmethod
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def path_exists(cls, file_path):
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return path_exists(file_path)
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@classmethod
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def check_file(cls, file_path, config_name):
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if file_path is None:
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raise ConfigError("Missing config for %s." % (config_name,))
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try:
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os.stat(file_path)
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except OSError as e:
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raise ConfigError(
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"Error accessing file '%s' (config for %s): %s"
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% (file_path, config_name, e.strerror)
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)
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return cls.abspath(file_path)
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@classmethod
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def ensure_directory(cls, dir_path):
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dir_path = cls.abspath(dir_path)
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try:
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os.makedirs(dir_path)
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except OSError as e:
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if e.errno != errno.EEXIST:
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raise
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if not os.path.isdir(dir_path):
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raise ConfigError("%s is not a directory" % (dir_path,))
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return dir_path
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@classmethod
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def read_file(cls, file_path, config_name):
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cls.check_file(file_path, config_name)
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with open(file_path) as file_stream:
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return file_stream.read()
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class RootConfig(object):
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"""
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Holder of an application's configuration.
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What configuration this object holds is defined by `config_classes`, a list
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of Config classes that will be instantiated and given the contents of a
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configuration file to read. They can then be accessed on this class by their
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section name, defined in the Config or dynamically set to be the name of the
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class, lower-cased and with "Config" removed.
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"""
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config_classes = []
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def __init__(self):
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self._configs = OrderedDict()
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for config_class in self.config_classes:
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if config_class.section is None:
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raise ValueError("%r requires a section name" % (config_class,))
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try:
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conf = config_class(self)
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except Exception as e:
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raise Exception("Failed making %s: %r" % (config_class.section, e))
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self._configs[config_class.section] = conf
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def __getattr__(self, item: str) -> Any:
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"""
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Redirect lookups on this object either to config objects, or values on
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config objects, so that `config.tls.blah` works, as well as legacy uses
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of things like `config.server_name`. It will first look up the config
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section name, and then values on those config classes.
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"""
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if item in self._configs.keys():
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return self._configs[item]
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return self._get_unclassed_config(None, item)
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def _get_unclassed_config(self, asking_section: Optional[str], item: str):
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"""
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Fetch a config value from one of the instantiated config classes that
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has not been fetched directly.
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Args:
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asking_section: If this check is coming from a Config child, which
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one? This section will not be asked if it has the value.
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item: The configuration value key.
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Raises:
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AttributeError if no config classes have the config key. The body
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will contain what sections were checked.
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"""
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for key, val in self._configs.items():
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if key == asking_section:
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continue
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if item in dir(val):
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return getattr(val, item)
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raise AttributeError(item, "not found in %s" % (list(self._configs.keys()),))
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def invoke_all(self, func_name: str, *args, **kwargs) -> MutableMapping[str, Any]:
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"""
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Invoke a function on all instantiated config objects this RootConfig is
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configured to use.
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Args:
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func_name: Name of function to invoke
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*args
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**kwargs
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Returns:
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ordered dictionary of config section name and the result of the
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function from it.
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"""
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res = OrderedDict()
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for name, config in self._configs.items():
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if hasattr(config, func_name):
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res[name] = getattr(config, func_name)(*args, **kwargs)
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return res
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@classmethod
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def invoke_all_static(cls, func_name: str, *args, **kwargs):
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"""
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Invoke a static function on config objects this RootConfig is
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configured to use.
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Args:
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func_name: Name of function to invoke
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*args
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**kwargs
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Returns:
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ordered dictionary of config section name and the result of the
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function from it.
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"""
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for config in cls.config_classes:
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if hasattr(config, func_name):
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getattr(config, func_name)(*args, **kwargs)
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def generate_config(
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self,
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config_dir_path,
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data_dir_path,
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server_name,
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generate_secrets=False,
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report_stats=None,
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open_private_ports=False,
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listeners=None,
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tls_certificate_path=None,
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tls_private_key_path=None,
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acme_domain=None,
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):
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"""
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Build a default configuration file
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This is used when the user explicitly asks us to generate a config file
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(eg with --generate_config).
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Args:
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config_dir_path (str): The path where the config files are kept. Used to
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create filenames for things like the log config and the signing key.
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data_dir_path (str): The path where the data files are kept. Used to create
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filenames for things like the database and media store.
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server_name (str): The server name. Used to initialise the server_name
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config param, but also used in the names of some of the config files.
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generate_secrets (bool): True if we should generate new secrets for things
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like the macaroon_secret_key. If False, these parameters will be left
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unset.
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report_stats (bool|None): Initial setting for the report_stats setting.
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If None, report_stats will be left unset.
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open_private_ports (bool): True to leave private ports (such as the non-TLS
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HTTP listener) open to the internet.
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listeners (list(dict)|None): A list of descriptions of the listeners
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synapse should start with each of which specifies a port (str), a list of
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resources (list(str)), tls (bool) and type (str). For example:
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[{
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"port": 8448,
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"resources": [{"names": ["federation"]}],
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"tls": True,
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"type": "http",
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},
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{
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"port": 443,
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"resources": [{"names": ["client"]}],
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"tls": False,
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"type": "http",
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}],
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database (str|None): The database type to configure, either `psycog2`
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or `sqlite3`.
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tls_certificate_path (str|None): The path to the tls certificate.
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tls_private_key_path (str|None): The path to the tls private key.
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acme_domain (str|None): The domain acme will try to validate. If
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specified acme will be enabled.
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Returns:
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str: the yaml config file
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"""
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return CONFIG_FILE_HEADER + "\n\n".join(
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dedent(conf)
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for conf in self.invoke_all(
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"generate_config_section",
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config_dir_path=config_dir_path,
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data_dir_path=data_dir_path,
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server_name=server_name,
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generate_secrets=generate_secrets,
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report_stats=report_stats,
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open_private_ports=open_private_ports,
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listeners=listeners,
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tls_certificate_path=tls_certificate_path,
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tls_private_key_path=tls_private_key_path,
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acme_domain=acme_domain,
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).values()
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)
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@classmethod
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def load_config(cls, description, argv):
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"""Parse the commandline and config files
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Doesn't support config-file-generation: used by the worker apps.
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Returns: Config object.
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"""
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config_parser = argparse.ArgumentParser(description=description)
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cls.add_arguments_to_parser(config_parser)
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obj, _ = cls.load_config_with_parser(config_parser, argv)
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return obj
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@classmethod
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def add_arguments_to_parser(cls, config_parser):
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"""Adds all the config flags to an ArgumentParser.
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Doesn't support config-file-generation: used by the worker apps.
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Used for workers where we want to add extra flags/subcommands.
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Args:
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config_parser (ArgumentParser): App description
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"""
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config_parser.add_argument(
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"-c",
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"--config-path",
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action="append",
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metavar="CONFIG_FILE",
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help="Specify config file. Can be given multiple times and"
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" may specify directories containing *.yaml files.",
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)
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config_parser.add_argument(
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"--keys-directory",
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metavar="DIRECTORY",
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help="Where files such as certs and signing keys are stored when"
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" their location is not given explicitly in the config."
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" Defaults to the directory containing the last config file",
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)
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cls.invoke_all_static("add_arguments", config_parser)
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@classmethod
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def load_config_with_parser(cls, parser, argv):
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"""Parse the commandline and config files with the given parser
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Doesn't support config-file-generation: used by the worker apps.
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Used for workers where we want to add extra flags/subcommands.
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Args:
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parser (ArgumentParser)
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argv (list[str])
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Returns:
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tuple[HomeServerConfig, argparse.Namespace]: Returns the parsed
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config object and the parsed argparse.Namespace object from
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`parser.parse_args(..)`
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"""
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obj = cls()
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config_args = parser.parse_args(argv)
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config_files = find_config_files(search_paths=config_args.config_path)
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if not config_files:
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parser.error("Must supply a config file.")
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if config_args.keys_directory:
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config_dir_path = config_args.keys_directory
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else:
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config_dir_path = os.path.dirname(config_files[-1])
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config_dir_path = os.path.abspath(config_dir_path)
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data_dir_path = os.getcwd()
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config_dict = read_config_files(config_files)
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obj.parse_config_dict(
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config_dict, config_dir_path=config_dir_path, data_dir_path=data_dir_path
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)
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obj.invoke_all("read_arguments", config_args)
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return obj, config_args
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@classmethod
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def load_or_generate_config(cls, description, argv):
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"""Parse the commandline and config files
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Supports generation of config files, so is used for the main homeserver app.
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Returns: Config object, or None if --generate-config or --generate-keys was set
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"""
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parser = argparse.ArgumentParser(description=description)
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parser.add_argument(
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"-c",
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"--config-path",
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action="append",
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metavar="CONFIG_FILE",
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help="Specify config file. Can be given multiple times and"
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" may specify directories containing *.yaml files.",
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)
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generate_group = parser.add_argument_group("Config generation")
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generate_group.add_argument(
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"--generate-config",
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action="store_true",
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help="Generate a config file, then exit.",
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)
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generate_group.add_argument(
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"--generate-missing-configs",
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"--generate-keys",
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action="store_true",
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help="Generate any missing additional config files, then exit.",
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)
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generate_group.add_argument(
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"-H", "--server-name", help="The server name to generate a config file for."
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)
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generate_group.add_argument(
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"--report-stats",
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action="store",
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help="Whether the generated config reports anonymized usage statistics.",
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choices=["yes", "no"],
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)
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generate_group.add_argument(
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"--config-directory",
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"--keys-directory",
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metavar="DIRECTORY",
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help=(
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"Specify where additional config files such as signing keys and log"
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" config should be stored. Defaults to the same directory as the last"
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" config file."
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),
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)
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generate_group.add_argument(
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"--data-directory",
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metavar="DIRECTORY",
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help=(
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"Specify where data such as the media store and database file should be"
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" stored. Defaults to the current working directory."
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),
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)
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generate_group.add_argument(
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"--open-private-ports",
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action="store_true",
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help=(
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"Leave private ports (such as the non-TLS HTTP listener) open to the"
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" internet. Do not use this unless you know what you are doing."
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),
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)
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cls.invoke_all_static("add_arguments", parser)
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config_args = parser.parse_args(argv)
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config_files = find_config_files(search_paths=config_args.config_path)
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if not config_files:
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parser.error(
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"Must supply a config file.\nA config file can be automatically"
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' generated using "--generate-config -H SERVER_NAME'
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' -c CONFIG-FILE"'
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)
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if config_args.config_directory:
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config_dir_path = config_args.config_directory
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else:
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config_dir_path = os.path.dirname(config_files[-1])
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config_dir_path = os.path.abspath(config_dir_path)
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data_dir_path = os.getcwd()
|
|
|
|
generate_missing_configs = config_args.generate_missing_configs
|
|
|
|
obj = cls()
|
|
|
|
if config_args.generate_config:
|
|
if config_args.report_stats is None:
|
|
parser.error(
|
|
"Please specify either --report-stats=yes or --report-stats=no\n\n"
|
|
+ MISSING_REPORT_STATS_SPIEL
|
|
)
|
|
|
|
(config_path,) = config_files
|
|
if not path_exists(config_path):
|
|
print("Generating config file %s" % (config_path,))
|
|
|
|
if config_args.data_directory:
|
|
data_dir_path = config_args.data_directory
|
|
else:
|
|
data_dir_path = os.getcwd()
|
|
data_dir_path = os.path.abspath(data_dir_path)
|
|
|
|
server_name = config_args.server_name
|
|
if not server_name:
|
|
raise ConfigError(
|
|
"Must specify a server_name to a generate config for."
|
|
" Pass -H server.name."
|
|
)
|
|
|
|
config_str = obj.generate_config(
|
|
config_dir_path=config_dir_path,
|
|
data_dir_path=data_dir_path,
|
|
server_name=server_name,
|
|
report_stats=(config_args.report_stats == "yes"),
|
|
generate_secrets=True,
|
|
open_private_ports=config_args.open_private_ports,
|
|
)
|
|
|
|
if not path_exists(config_dir_path):
|
|
os.makedirs(config_dir_path)
|
|
with open(config_path, "w") as config_file:
|
|
config_file.write(config_str)
|
|
config_file.write("\n\n# vim:ft=yaml")
|
|
|
|
config_dict = yaml.safe_load(config_str)
|
|
obj.generate_missing_files(config_dict, config_dir_path)
|
|
|
|
print(
|
|
(
|
|
"A config file has been generated in %r for server name"
|
|
" %r. Please review this file and customise it"
|
|
" to your needs."
|
|
)
|
|
% (config_path, server_name)
|
|
)
|
|
return
|
|
else:
|
|
print(
|
|
(
|
|
"Config file %r already exists. Generating any missing config"
|
|
" files."
|
|
)
|
|
% (config_path,)
|
|
)
|
|
generate_missing_configs = True
|
|
|
|
config_dict = read_config_files(config_files)
|
|
if generate_missing_configs:
|
|
obj.generate_missing_files(config_dict, config_dir_path)
|
|
return None
|
|
|
|
obj.parse_config_dict(
|
|
config_dict, config_dir_path=config_dir_path, data_dir_path=data_dir_path
|
|
)
|
|
obj.invoke_all("read_arguments", config_args)
|
|
|
|
return obj
|
|
|
|
def parse_config_dict(self, config_dict, config_dir_path=None, data_dir_path=None):
|
|
"""Read the information from the config dict into this Config object.
|
|
|
|
Args:
|
|
config_dict (dict): Configuration data, as read from the yaml
|
|
|
|
config_dir_path (str): The path where the config files are kept. Used to
|
|
create filenames for things like the log config and the signing key.
|
|
|
|
data_dir_path (str): The path where the data files are kept. Used to create
|
|
filenames for things like the database and media store.
|
|
"""
|
|
self.invoke_all(
|
|
"read_config",
|
|
config_dict,
|
|
config_dir_path=config_dir_path,
|
|
data_dir_path=data_dir_path,
|
|
)
|
|
|
|
def generate_missing_files(self, config_dict, config_dir_path):
|
|
self.invoke_all("generate_files", config_dict, config_dir_path)
|
|
|
|
|
|
def read_config_files(config_files):
|
|
"""Read the config files into a dict
|
|
|
|
Args:
|
|
config_files (iterable[str]): A list of the config files to read
|
|
|
|
Returns: dict
|
|
"""
|
|
specified_config = {}
|
|
for config_file in config_files:
|
|
with open(config_file) as file_stream:
|
|
yaml_config = yaml.safe_load(file_stream)
|
|
specified_config.update(yaml_config)
|
|
|
|
if "server_name" not in specified_config:
|
|
raise ConfigError(MISSING_SERVER_NAME)
|
|
|
|
if "report_stats" not in specified_config:
|
|
raise ConfigError(
|
|
MISSING_REPORT_STATS_CONFIG_INSTRUCTIONS + "\n" + MISSING_REPORT_STATS_SPIEL
|
|
)
|
|
return specified_config
|
|
|
|
|
|
def find_config_files(search_paths):
|
|
"""Finds config files using a list of search paths. If a path is a file
|
|
then that file path is added to the list. If a search path is a directory
|
|
then all the "*.yaml" files in that directory are added to the list in
|
|
sorted order.
|
|
|
|
Args:
|
|
search_paths(list(str)): A list of paths to search.
|
|
|
|
Returns:
|
|
list(str): A list of file paths.
|
|
"""
|
|
|
|
config_files = []
|
|
if search_paths:
|
|
for config_path in search_paths:
|
|
if os.path.isdir(config_path):
|
|
# We accept specifying directories as config paths, we search
|
|
# inside that directory for all files matching *.yaml, and then
|
|
# we apply them in *sorted* order.
|
|
files = []
|
|
for entry in os.listdir(config_path):
|
|
entry_path = os.path.join(config_path, entry)
|
|
if not os.path.isfile(entry_path):
|
|
err = "Found subdirectory in config directory: %r. IGNORING."
|
|
print(err % (entry_path,))
|
|
continue
|
|
|
|
if not entry.endswith(".yaml"):
|
|
err = (
|
|
"Found file in config directory that does not end in "
|
|
"'.yaml': %r. IGNORING."
|
|
)
|
|
print(err % (entry_path,))
|
|
continue
|
|
|
|
files.append(entry_path)
|
|
|
|
config_files.extend(sorted(files))
|
|
else:
|
|
config_files.append(config_path)
|
|
return config_files
|
|
|
|
|
|
__all__ = ["Config", "RootConfig"]
|