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>=14.0.0": ["twisted>=14.0.0"], "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) )