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# Authors: Cedric Bosdonnat <cbosdonnat@suse.com>
#
# Copyright (C) 2017 SUSE, Inc.
#
# 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, either version 3 of the License, or
# (at your option) any later version.
# 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/>.
"""
FileSource aim is to extract root filesystem from tar archive to destination
directory or qcow2 image.
"""
import os
import logging
from virtBootstrap import utils
# pylint: disable=invalid-name
# Create logger
logger = logging.getLogger(__name__)
class FileSource(object):
"""
Extract root filesystem from file.
"""
def __init__(self, **kwargs):
"""
Bootstrap root filesystem from tarball
@param uri: Path to tar archive file.
@param fmt: Format used to store image [dir, qcow2]
@param progress: Instance of the progress module
"""
self.path = kwargs['uri'].path
self.output_format = kwargs.get('fmt', utils.DEFAULT_OUTPUT_FORMAT)
self.progress = kwargs['progress'].update_progress
def unpack(self, dest):
"""
Safely extract root filesystem from tarball
@param dest: Directory path where the files to be extraced
"""
if not os.path.isfile(self.path):
raise Exception('Invalid file source "%s"' % self.path)
layer = [[self.path, os.path.getsize(self.path)]]
if self.output_format == 'dir':
self.progress("Extracting files into destination directory",
value=0, logger=logger)
utils.untar_layers(layer, dest, self.progress)
elif self.output_format == 'qcow2':
# Remove the old path
file_name = os.path.basename(self.path)
qcow2_file = os.path.realpath('{}/{}.qcow2'.format(dest,
file_name))
self.progress("Extracting files into qcow2 image", value=0,
logger=logger)
utils.create_qcow2(self.path, qcow2_file)
else:
raise Exception("Unknown format:" + self.output_format)
self.progress("Extraction completed successfully!", value=100,
logger=logger)
logger.info("Files are stored in: " + dest)
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