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# -*- Mode: Python; coding: utf-8; indent-tabs-mode: nil; tab-width: 4 -*-
# Copyright (C) 2013 Canonical Ltd.
# Author: Sergio Schvezov <sergio.schvezov@canonical.com>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import atexit
import contextlib
import logging
import lzma
import os.path
import shutil
import tarfile
import tempfile
log = logging.getLogger()
def cleanup(directory):
if os.path.exists(directory) and os.path.isdir(directory):
print('Removing directory %s' % directory)
shutil.rmtree(directory)
def create_temp_dir():
directory = tempfile.mkdtemp()
atexit.register(cleanup, directory)
return directory
def create_path(directory, subdir):
directory = os.path.join(directory, subdir)
if not os.path.exists(directory):
log.debug('Creating directory %s' % directory)
try:
os.makedirs(directory)
except OSError as e:
if e.errno == 17:
pass
else:
raise e
return directory
def lzma_extract_file(lzma_tarfile, file_name):
log.info('Decompressing %s from %s' % (file_name, lzma_tarfile))
temp_dir = create_temp_dir()
with contextlib.closing(lzma.LZMAFile(lzma_tarfile)) as xz:
with tarfile.open(fileobj=xz) as tar:
tar.extract(member=file_name, path=temp_dir)
return os.path.join(temp_dir, file_name)
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