# -*- coding: utf-8 -*- # Copyright (C) 2010-2013 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 GNU tar program.""" import os def extract_tar (archive, compression, cmd, **kwargs): """Extract a TAR archive.""" cmdlist = [cmd, '--extract'] add_tar_opts(cmdlist, compression, kwargs['verbose']) cmdlist.extend(["--file", archive, '--directory', kwargs['outdir']]) return cmdlist def list_tar (archive, compression, cmd, **kwargs): """List a TAR archive.""" cmdlist = [cmd, '--list'] add_tar_opts(cmdlist, compression, kwargs['verbose']) cmdlist.extend(["--file", archive]) return cmdlist test_tar = list_tar def create_tar (archive, compression, cmd, *args, **kwargs): """Create a TAR archive.""" cmdlist = [cmd, '--create'] add_tar_opts(cmdlist, compression, kwargs['verbose']) cmdlist.extend(["--file", archive, '--']) cmdlist.extend(args) return cmdlist def add_tar_opts (cmdlist, compression, verbose): """Add tar options to cmdlist.""" progname = os.path.basename(cmdlist[0]) if compression == 'gzip': cmdlist.append('-z') elif compression == 'compress': cmdlist.append('-Z') elif compression == 'bzip2': cmdlist.append('-j') elif compression in ('lzma', 'xz') and progname == 'bsdtar': cmdlist.append('--%s' % compression) elif compression in ('lzma', 'xz', 'lzip'): # use the compression name as program name since # tar is picky which programs it can use program = compression # set compression program cmdlist.extend(['--use-compress-program', program]) if verbose: cmdlist.append('--verbose')