# -*- coding: utf-8 -*- # Copyright (C) 2012-2015 Bastian Kleineidam # # 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/>. """Archive commands for the bz2 Python module.""" from .. import util try: # try external bz2file module with multi-stream support import bz2file as bz2 except ImportError: import bz2 # read in 1MB chunks READ_SIZE_BYTES = 1024*1024 def extract_bzip2 (archive, compression, cmd, verbosity, interactive, outdir): """Extract a BZIP2 archive with the bz2 Python module.""" targetname = util.get_single_outfile(outdir, archive) try: with bz2.BZ2File(archive) as bz2file: with open(targetname, 'wb') as targetfile: data = bz2file.read(READ_SIZE_BYTES) while data: targetfile.write(data) data = bz2file.read(READ_SIZE_BYTES) except Exception as err: msg = "error extracting %s to %s: %s" % (archive, targetname, err) raise util.PatoolError(msg) return None def create_bzip2 (archive, compression, cmd, verbosity, interactive, filenames): """Create a BZIP2 archive with the bz2 Python module.""" if len(filenames) > 1: raise util.PatoolError('multi-file compression not supported in Python bz2') try: with bz2.BZ2File(archive, 'wb') as bz2file: filename = filenames[0] with open(filename, 'rb') as srcfile: data = srcfile.read(READ_SIZE_BYTES) while data: bz2file.write(data) data = srcfile.read(READ_SIZE_BYTES) except Exception as err: msg = "error creating %s: %s" % (archive, err) raise util.PatoolError(msg) return None