447 lines
15 KiB
Python
447 lines
15 KiB
Python
# -*- coding: utf-8 -*-
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# 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 argparse
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import errno
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import os
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from textwrap import dedent
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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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class Config(object):
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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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"""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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@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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@staticmethod
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def read_config_file(file_path):
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with open(file_path) as file_stream:
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return yaml.load(file_stream)
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def invoke_all(self, name, *args, **kargs):
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results = []
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for cls in type(self).mro():
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if name in cls.__dict__:
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results.append(getattr(cls, name)(self, *args, **kargs))
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return results
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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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):
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"""Build a default configuration file
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This is used both when the user explicitly asks us to generate a config file
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(eg with --generate_config), and before loading the config at runtime (to give
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a base which the config files override)
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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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Returns:
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str: the yaml config file
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"""
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default_config = "# vim:ft=yaml\n"
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default_config += "\n\n".join(
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dedent(conf)
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for conf in self.invoke_all(
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"default_config",
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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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)
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)
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return default_config
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@classmethod
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def load_config(cls, description, argv):
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config_parser = argparse.ArgumentParser(description=description)
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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 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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config_args = config_parser.parse_args(argv)
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config_files = find_config_files(search_paths=config_args.config_path)
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obj = cls()
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obj.read_config_files(
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config_files, keys_directory=config_args.keys_directory, generate_keys=False
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)
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return obj
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@classmethod
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def load_or_generate_config(cls, description, argv):
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config_parser = argparse.ArgumentParser(add_help=False)
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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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"--generate-config",
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action="store_true",
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help="Generate a config file for the server name",
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)
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config_parser.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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config_parser.add_argument(
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"--generate-keys",
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action="store_true",
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help="Generate any missing key files then exit",
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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="Used with 'generate-*' options to specify where files such as"
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" certs and signing keys should be stored in, unless explicitly"
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" specified in the config.",
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)
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config_parser.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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config_args, remaining_args = config_parser.parse_known_args(argv)
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config_files = find_config_files(search_paths=config_args.config_path)
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generate_keys = config_args.generate_keys
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obj = cls()
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if config_args.generate_config:
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if config_args.report_stats is None:
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config_parser.error(
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"Please specify either --report-stats=yes or --report-stats=no\n\n"
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+ MISSING_REPORT_STATS_SPIEL
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)
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if not config_files:
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config_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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(config_path,) = config_files
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if not cls.path_exists(config_path):
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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_path)
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config_dir_path = os.path.abspath(config_dir_path)
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server_name = config_args.server_name
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if not server_name:
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raise ConfigError(
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"Must specify a server_name to a generate config for."
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" Pass -H server.name."
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)
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if not cls.path_exists(config_dir_path):
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os.makedirs(config_dir_path)
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with open(config_path, "w") as config_file:
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config_str = obj.generate_config(
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config_dir_path=config_dir_path,
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data_dir_path=os.getcwd(),
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server_name=server_name,
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report_stats=(config_args.report_stats == "yes"),
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generate_secrets=True,
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)
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config = yaml.load(config_str)
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obj.invoke_all("generate_files", config)
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config_file.write(config_str)
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print(
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(
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"A config file has been generated in %r for server name"
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" %r with corresponding SSL keys and self-signed"
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" certificates. Please review this file and customise it"
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" to your needs."
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)
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% (config_path, server_name)
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)
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print(
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"If this server name is incorrect, you will need to"
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" regenerate the SSL certificates"
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)
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return
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else:
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print(
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(
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"Config file %r already exists. Generating any missing key"
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" files."
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)
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% (config_path,)
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)
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generate_keys = True
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parser = argparse.ArgumentParser(
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parents=[config_parser],
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description=description,
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formatter_class=argparse.RawDescriptionHelpFormatter,
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)
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obj.invoke_all("add_arguments", parser)
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args = parser.parse_args(remaining_args)
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if not config_files:
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config_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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obj.read_config_files(
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config_files,
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keys_directory=config_args.keys_directory,
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generate_keys=generate_keys,
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)
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if generate_keys:
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return None
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obj.invoke_all("read_arguments", args)
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return obj
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def read_config_files(self, config_files, keys_directory=None, generate_keys=False):
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if not keys_directory:
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keys_directory = os.path.dirname(config_files[-1])
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self.config_dir_path = os.path.abspath(keys_directory)
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specified_config = {}
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for config_file in config_files:
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yaml_config = self.read_config_file(config_file)
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specified_config.update(yaml_config)
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if "server_name" not in specified_config:
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raise ConfigError(MISSING_SERVER_NAME)
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server_name = specified_config["server_name"]
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config_string = self.generate_config(
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config_dir_path=self.config_dir_path,
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data_dir_path=os.getcwd(),
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server_name=server_name,
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generate_secrets=False,
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)
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config = yaml.load(config_string)
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config.pop("log_config")
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config.update(specified_config)
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if "report_stats" not in config:
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raise ConfigError(
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MISSING_REPORT_STATS_CONFIG_INSTRUCTIONS
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+ "\n"
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+ MISSING_REPORT_STATS_SPIEL
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)
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if generate_keys:
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self.invoke_all("generate_files", config)
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return
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self.invoke_all("read_config", config)
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def find_config_files(search_paths):
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"""Finds config files using a list of search paths. If a path is a file
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then that file path is added to the list. If a search path is a directory
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then all the "*.yaml" files in that directory are added to the list in
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sorted order.
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Args:
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search_paths(list(str)): A list of paths to search.
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Returns:
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list(str): A list of file paths.
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"""
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config_files = []
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if search_paths:
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for config_path in search_paths:
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if os.path.isdir(config_path):
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# We accept specifying directories as config paths, we search
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# inside that directory for all files matching *.yaml, and then
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# we apply them in *sorted* order.
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files = []
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for entry in os.listdir(config_path):
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entry_path = os.path.join(config_path, entry)
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if not os.path.isfile(entry_path):
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err = "Found subdirectory in config directory: %r. IGNORING."
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print(err % (entry_path,))
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continue
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if not entry.endswith(".yaml"):
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err = (
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"Found file in config directory that does not end in "
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"'.yaml': %r. IGNORING."
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)
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print(err % (entry_path,))
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continue
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files.append(entry_path)
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config_files.extend(sorted(files))
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else:
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config_files.append(config_path)
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return config_files
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