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Diffstat (limited to 'synapse/python_dependencies.py')
-rw-r--r-- | synapse/python_dependencies.py | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/synapse/python_dependencies.py b/synapse/python_dependencies.py new file mode 100644 index 0000000000..826a36f203 --- /dev/null +++ b/synapse/python_dependencies.py @@ -0,0 +1,80 @@ +import logging +from distutils.version import LooseVersion + +logger = logging.getLogger(__name__) + +REQUIREMENTS = { + "syutil==0.0.2": ["syutil"], + "matrix_angular_sdk==0.6.0": ["syweb>=0.6.0"], + "Twisted==14.0.2": ["twisted==14.0.2"], + "service_identity>=1.0.0": ["service_identity>=1.0.0"], + "pyopenssl>=0.14": ["OpenSSL>=0.14"], + "pyyaml": ["yaml"], + "pyasn1": ["pyasn1"], + "pynacl": ["nacl"], + "daemonize": ["daemonize"], + "py-bcrypt": ["bcrypt"], + "frozendict>=0.4": ["frozendict"], + "pillow": ["PIL"], +} + + +class MissingRequirementError(Exception): + pass + + +def check_requirements(): + """Checks that all the modules needed by synapse have been correctly + installed and are at the correct version""" + for dependency, module_requirements in REQUIREMENTS.items(): + for module_requirement in module_requirements: + if ">=" in module_requirement: + module_name, required_version = module_requirement.split(">=") + version_test = ">=" + elif "==" in module_requirement: + module_name, required_version = module_requirement.split("==") + version_test = "==" + else: + module_name = module_requirement + version_test = None + + try: + module = __import__(module_name) + except ImportError: + logging.exception( + "Can't import %r which is part of %r", + module_name, dependency + ) + raise MissingRequirementError( + "Can't import %r which is part of %r" + % (module_name, dependency) + ) + version = getattr(module, "__version__", None) + file_path = getattr(module, "__file__", None) + logger.info( + "Using %r version %r from %r to satisfy %r", + module_name, version, file_path, dependency + ) + + if version_test == ">=": + if version is None: + raise MissingRequirementError( + "Version of %r isn't set as __version__ of module %r" + % (dependency, module_name) + ) + if LooseVersion(version) < LooseVersion(required_version): + raise MissingRequirementError( + "Version of %r in %r is too old. %r < %r" + % (dependency, file_path, version, required_version) + ) + elif version_test == "==": + if version is None: + raise MissingRequirementError( + "Version of %r isn't set as __version__ of module %r" + % (dependency, module_name) + ) + if LooseVersion(version) != LooseVersion(required_version): + raise MissingRequirementError( + "Unexpected version of %r in %r. %r != %r" + % (dependency, file_path, version, required_version) + ) |