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#!/usr/bin/python
# Copyright 2016 Google Inc. All Rights Reserved.
#
# Licensed 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.
"""A module for resolving compatibility issues between Python 2 and Python 3."""
import logging
import subprocess
import sys
if sys.version_info >= (3, 7):
import distro
else:
import platform as distro
if 'freebsd' in sys.platform:
# Note: Do not use .version() method which is from either platform or distro.
# platform.version() and distro.version() return different values.
# platform.version() returns 'FreeBSD 11.2-RELEASE-p9.....'.
# distro.version() returns '11.2'.
distro_name = 'freebsd'
# distro_version is not used for FreeBSD later in this code.
distro_version = None
else:
distribution = distro.linux_distribution()
distro_name = distribution[0].lower()
distro_version = distribution[1].split('.')[0]
distro_utils = None
if 'centos' in distro_name and distro_version == '6':
import google_compute_engine.distro_lib.el_6.utils as distro_utils
elif 'centos' in distro_name:
import google_compute_engine.distro_lib.el_7.utils as distro_utils
elif 'red hat enterprise linux' in distro_name and distro_version == '6':
import google_compute_engine.distro_lib.el_6.utils as distro_utils
elif 'red hat enterprise linux' in distro_name:
import google_compute_engine.distro_lib.el_7.utils as distro_utils
elif 'fedora' in distro_name:
import google_compute_engine.distro_lib.el_7.utils as distro_utils
elif 'debian' in distro_name and distro_version == '8':
import google_compute_engine.distro_lib.debian_8.utils as distro_utils
elif 'debian' in distro_name:
import google_compute_engine.distro_lib.debian_9.utils as distro_utils
elif 'suse' in distro_name and distro_version == '11':
import google_compute_engine.distro_lib.sles_11.utils as distro_utils
elif 'suse' in distro_name:
import google_compute_engine.distro_lib.sles_12.utils as distro_utils
elif 'freebsd' in distro_name:
import google_compute_engine.distro_lib.freebsd_11.utils as distro_utils
else:
# Default to Debian 9.
import google_compute_engine.distro_lib.debian_9.utils as distro_utils
RETRY_LIMIT = 3
TIMEOUT = 10
if sys.version_info >= (3, 0):
# Python 3 imports.
import configparser as parser
import http.client as httpclient
import io as stringio
import urllib.error as urlerror
import urllib.parse as urlparse
import urllib.request as urlrequest
import urllib.request as urlretrieve
else:
# Python 2 imports.
import ConfigParser as parser
import httplib as httpclient
import StringIO as stringio
import urllib as urlparse
import urllib as urlretrieve
import urllib2 as urlrequest
import urllib2 as urlerror
if sys.version_info < (2, 7):
class NullHandler(logging.Handler):
def emit(self, record):
pass
def handle(self, record):
pass
def createLock(self):
pass
logging.NullHandler = NullHandler
if sys.version_info < (2, 7, 9):
# Native Python libraries do not check SSL certificates.
def curlretrieve(url, filename=None, *args, **kwargs):
command = ['curl', '--max-time', str(TIMEOUT), '--retry', str(RETRY_LIMIT)]
if filename:
command += ['-o', filename]
command += ['--', url]
subprocess.check_call(command)
urlretrieve.urlretrieve = curlretrieve
if sys.version_info < (3, 2):
parser.SafeConfigParser.read_file = parser.SafeConfigParser.readfp
parser.Parser = parser.SafeConfigParser
else:
parser.Parser = parser.ConfigParser
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