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![Richard van der Hoff](/assets/img/avatar_default.png)
For the record, the reason we need this is as follows: each RDATA command comes down the redis pipe as a subscription message. txredisapi as written needs at least three reactor ticks to read each subscription message from the tcp buffer. Hence, once the process gets loaded, it starts getting behind, and eventually redis knifes the connection. it then takes ages for the master to work its way through the backlog, before it reconnects again, during which any commands from any workers are dropped.
218 lines
7.1 KiB
Python
218 lines
7.1 KiB
Python
# Copyright 2015, 2016 OpenMarket Ltd
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# Copyright 2017 Vector Creations Ltd
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# Copyright 2018 New Vector Ltd
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# Copyright 2020 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 logging
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from typing import List, Set
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from pkg_resources import (
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DistributionNotFound,
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Requirement,
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VersionConflict,
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get_provider,
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)
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logger = logging.getLogger(__name__)
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# REQUIREMENTS is a simple list of requirement specifiers[1], and must be
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# installed. It is passed to setup() as install_requires in setup.py.
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#
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# CONDITIONAL_REQUIREMENTS is the optional dependencies, represented as a dict
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# of lists. The dict key is the optional dependency name and can be passed to
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# pip when installing. The list is a series of requirement specifiers[1] to be
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# installed when that optional dependency requirement is specified. It is passed
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# to setup() as extras_require in setup.py
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#
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# [1] https://pip.pypa.io/en/stable/reference/pip_install/#requirement-specifiers.
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REQUIREMENTS = [
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"jsonschema>=2.5.1",
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"frozendict>=1",
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"unpaddedbase64>=1.1.0",
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"canonicaljson>=1.1.3",
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# we use the type definitions added in signedjson 1.1.
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"signedjson>=1.1.0",
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"pynacl>=1.2.1",
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"idna>=2.5",
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# validating SSL certs for IP addresses requires service_identity 18.1.
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"service_identity>=18.1.0",
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# Twisted 18.9 introduces some logger improvements that the structured
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# logger utilises
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"Twisted>=18.9.0",
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"treq>=15.1",
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# Twisted has required pyopenssl 16.0 since about Twisted 16.6.
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"pyopenssl>=16.0.0",
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"pyyaml>=3.11",
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"pyasn1>=0.1.9",
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"pyasn1-modules>=0.0.7",
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"daemonize>=2.3.1",
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"bcrypt>=3.1.0",
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"pillow>=4.3.0",
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"sortedcontainers>=1.4.4",
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"pymacaroons>=0.13.0",
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"msgpack>=0.5.2",
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"phonenumbers>=8.2.0",
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"six>=1.10",
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"prometheus_client>=0.0.18,<0.8.0",
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# we use attr.s(slots), which arrived in 16.0.0
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# Twisted 18.7.0 requires attrs>=17.4.0
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"attrs>=17.4.0",
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"netaddr>=0.7.18",
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"Jinja2>=2.9",
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"bleach>=1.4.3",
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"typing-extensions>=3.7.4",
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]
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CONDITIONAL_REQUIREMENTS = {
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"matrix-synapse-ldap3": ["matrix-synapse-ldap3>=0.1"],
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# we use execute_batch, which arrived in psycopg 2.7.
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"postgres": ["psycopg2>=2.7"],
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# ConsentResource uses select_autoescape, which arrived in jinja 2.9
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"resources.consent": ["Jinja2>=2.9"],
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# ACME support is required to provision TLS certificates from authorities
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# that use the protocol, such as Let's Encrypt.
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"acme": [
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"txacme>=0.9.2",
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# txacme depends on eliot. Eliot 1.8.0 is incompatible with
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# python 3.5.2, as per https://github.com/itamarst/eliot/issues/418
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'eliot<1.8.0;python_version<"3.5.3"',
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],
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"saml2": ["pysaml2>=4.5.0"],
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"systemd": ["systemd-python>=231"],
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"url_preview": ["lxml>=3.5.0"],
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"test": ["mock>=2.0", "parameterized"],
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"sentry": ["sentry-sdk>=0.7.2"],
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"opentracing": ["jaeger-client>=4.0.0", "opentracing>=2.2.0"],
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"jwt": ["pyjwt>=1.6.4"],
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# hiredis is not a *strict* dependency, but it makes things much faster.
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# (if it is not installed, we fall back to slow code.)
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"redis": ["txredisapi>=1.4.7", "hiredis"],
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}
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ALL_OPTIONAL_REQUIREMENTS = set() # type: Set[str]
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for name, optional_deps in CONDITIONAL_REQUIREMENTS.items():
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# Exclude systemd as it's a system-based requirement.
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if name not in ["systemd"]:
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ALL_OPTIONAL_REQUIREMENTS = set(optional_deps) | ALL_OPTIONAL_REQUIREMENTS
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def list_requirements():
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return list(set(REQUIREMENTS) | ALL_OPTIONAL_REQUIREMENTS)
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class DependencyException(Exception):
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@property
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def message(self):
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return "\n".join(
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[
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"Missing Requirements: %s" % (", ".join(self.dependencies),),
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"To install run:",
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" pip install --upgrade --force %s" % (" ".join(self.dependencies),),
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"",
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]
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)
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@property
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def dependencies(self):
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for i in self.args[0]:
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yield "'" + i + "'"
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def check_requirements(for_feature=None):
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deps_needed = []
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errors = []
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if for_feature:
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reqs = CONDITIONAL_REQUIREMENTS[for_feature]
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else:
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reqs = REQUIREMENTS
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for dependency in reqs:
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try:
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_check_requirement(dependency)
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except VersionConflict as e:
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deps_needed.append(dependency)
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errors.append(
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"Needed %s, got %s==%s"
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% (
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dependency,
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e.dist.project_name, # type: ignore[attr-defined] # noqa
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e.dist.version, # type: ignore[attr-defined] # noqa
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)
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)
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except DistributionNotFound:
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deps_needed.append(dependency)
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if for_feature:
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errors.append(
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"Needed %s for the '%s' feature but it was not installed"
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% (dependency, for_feature)
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)
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else:
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errors.append("Needed %s but it was not installed" % (dependency,))
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if not for_feature:
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# Check the optional dependencies are up to date. We allow them to not be
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# installed.
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OPTS = sum(CONDITIONAL_REQUIREMENTS.values(), []) # type: List[str]
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for dependency in OPTS:
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try:
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_check_requirement(dependency)
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except VersionConflict as e:
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deps_needed.append(dependency)
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errors.append(
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"Needed optional %s, got %s==%s"
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% (
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dependency,
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e.dist.project_name, # type: ignore[attr-defined] # noqa
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e.dist.version, # type: ignore[attr-defined] # noqa
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)
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)
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except DistributionNotFound:
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# If it's not found, we don't care
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pass
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if deps_needed:
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for err in errors:
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logging.error(err)
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raise DependencyException(deps_needed)
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def _check_requirement(dependency_string):
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"""Parses a dependency string, and checks if the specified requirement is installed
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Raises:
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VersionConflict if the requirement is installed, but with the the wrong version
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DistributionNotFound if nothing is found to provide the requirement
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"""
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req = Requirement.parse(dependency_string)
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# first check if the markers specify that this requirement needs installing
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if req.marker is not None and not req.marker.evaluate():
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# not required for this environment
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return
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get_provider(req)
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if __name__ == "__main__":
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import sys
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sys.stdout.writelines(req + "\n" for req in list_requirements())
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