72 lines
2.4 KiB
Python
72 lines
2.4 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2012-2015 Bastian Kleineidam
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""Archive commands for the tarfile Python module."""
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from .. import util, py_lzma
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import tarfile
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READ_SIZE_BYTES = 1024*1024
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def list_tar (archive, compression, cmd, verbosity, interactive):
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"""List a TAR archive with the tarfile Python module."""
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try:
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with tarfile.open(archive) as tfile:
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tfile.list(verbose=verbosity>1)
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except Exception as err:
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msg = "error listing %s: %s" % (archive, err)
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raise util.PatoolError(msg)
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return None
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test_tar = list_tar
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def extract_tar (archive, compression, cmd, verbosity, interactive, outdir):
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"""Extract a TAR archive with the tarfile Python module."""
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try:
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with tarfile.open(archive) as tfile:
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tfile.extractall(path=outdir)
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except Exception as err:
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msg = "error extracting %s: %s" % (archive, err)
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raise util.PatoolError(msg)
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return None
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def create_tar (archive, compression, cmd, verbosity, interactive, filenames):
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"""Create a TAR archive with the tarfile Python module."""
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mode = get_tar_mode(compression)
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try:
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with tarfile.open(archive, mode) as tfile:
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for filename in filenames:
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tfile.add(filename)
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except Exception as err:
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msg = "error creating %s: %s" % (archive, err)
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raise util.PatoolError(msg)
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return None
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def get_tar_mode (compression):
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"""Determine tarfile open mode according to the given compression."""
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if compression == 'gzip':
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return 'w:gz'
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if compression == 'bzip2':
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return 'w:bz2'
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if compression == 'lzma' and py_lzma:
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return 'w:xz'
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if compression:
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msg = 'pytarfile does not support %s for tar compression'
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raise util.PatoolError(msg % compression)
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# no compression
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return 'w'
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