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# Copyright (C) 2012-2013 Codethink Limited
#
# 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 2 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import cliapp
import gzip
import logging
import os
import tempfile
import shutil
import morphlib
class ExtractedTarball(object): # pragma: no cover
'''Tarball extracted in a temporary directory.
This can be used e.g. to inspect the contents of a rootfs tarball.
'''
def __init__(self, app, tarball):
self.app = app
self.tarball = tarball
def setup(self):
self.app.status(msg='Preparing tarball %(tarball)s',
tarball=os.path.basename(self.tarball), chatty=True)
self.app.status(msg=' Extracting...', chatty=True)
self.tempdir = tempfile.mkdtemp(dir=self.app.settings['tempdir'])
try:
morphlib.bins.unpack_binary(self.tarball, self.tempdir)
except BaseException, e:
logging.error('Caught exception: %s' % str(e))
logging.debug('Removing temporary directory %s' % self.tempdir)
shutil.rmtree(self.tempdir)
raise
return self.tempdir
def cleanup(self):
self.app.status(msg='Cleanup extracted tarball %(tarball)s',
tarball=os.path.basename(self.tarball), chatty=True)
try:
shutil.rmtree(self.tempdir)
except BaseException, e:
logging.warning(
'Error when removing temporary directory %s: %s' %
(self.tempdir, str(e)))
def __enter__(self):
return self.setup()
def __exit__(self, exctype, excvalue, exctraceback):
self.cleanup()
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