Testing OpenStack upgrades
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tobiko/tobiko/openstack/glance/_lzma.py

47 lines
1.2 KiB

# Copyright 2019 Red Hat
#
# 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.
from __future__ import absolute_import
import sys
import tobiko
def import_lzma():
try:
import lzma
except ImportError:
from backports import lzma
return lzma
def has_lzma():
try:
return import_lzma()
except ImportError:
return None
def open_file(filename, mode):
try:
lzma = import_lzma()
except ImportError:
tobiko.skip_test(
"Package lzma or backports.lzma is required to decompress "
f"{filename!r} (mode={mode!r}) XZ image file "
f"({sys.version!r}).")
return lzma.LZMAFile(filename=filename, mode=mode)