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# Licensed to the Apache Software Foundation (ASF) under one or more # contributor license agreements. See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You under the Apache License, Version 2.0 # (the "License"); you may not use this file except in compliance with # the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. """ libcloud provides a unified interface to the cloud computing resources. :var __version__: Current version of libcloud """ import os import codecs import atexit from libcloud.base import DriverType # NOQA from libcloud.base import DriverTypeFactoryMap # NOQA from libcloud.base import get_driver # NOQA try: # TODO: This import is slow and adds overhead in situations when no # requests are made but it's necessary for detecting bad version of # requests import requests # NOQA have_requests = True except ImportError: have_requests = False __all__ = [ '__version__', 'enable_debug' ] __version__ = '3.4.1' def enable_debug(fo): """ Enable library wide debugging to a file-like object. :param fo: Where to append debugging information :type fo: File like object, only write operations are used. """ from libcloud.common.base import Connection from libcloud.utils.loggingconnection import LoggingConnection LoggingConnection.log = fo Connection.conn_class = LoggingConnection # Ensure the file handle is closed on exit def close_file(fd): try: fd.close() except Exception: pass atexit.register(close_file, fo) def _init_once(): """ Utility function that is ran once on Library import. This checks for the LIBCLOUD_DEBUG environment variable, which if it exists is where we will log debug information about the provider transports. This also checks for known environment/dependency incompatibilities. """ path = os.getenv('LIBCLOUD_DEBUG') if path: mode = 'a' # Special case for /dev/stderr and /dev/stdout on Python 3. from libcloud.utils.py3 import PY3 # Opening those files in append mode will throw "illegal seek" # exception there. # Late import to avoid setup.py related side affects if path in ['/dev/stderr', '/dev/stdout'] and PY3: mode = 'w' fo = codecs.open(path, mode, encoding='utf8') enable_debug(fo) # NOTE: We use lazy import to avoid unnecessary import time overhead try: import paramiko # NOQA have_paramiko = True except ImportError: have_paramiko = False if have_paramiko and hasattr(paramiko.util, 'log_to_file'): import logging # paramiko always tries to open file path in append mode which # won't work with /dev/{stdout, stderr} so we just ignore those # errors try: paramiko.util.log_to_file(filename=path, level=logging.DEBUG) except OSError as e: if "illegal seek" not in str(e).lower(): raise e # check for broken `yum install python-requests` if have_requests and requests.__version__ == '2.6.0': chardet_version = requests.packages.chardet.__version__ required_chardet_version = '2.3.0' assert chardet_version == required_chardet_version, ( 'Known bad version of requests detected! This can happen when ' 'requests was installed from a source other than PyPI, e.g. via ' 'a package manager such as yum. Please either install requests ' 'from PyPI or run `pip install chardet==%s` to resolve this ' 'issue.' % required_chardet_version ) _init_once()