63 lines
2.2 KiB
Python
63 lines
2.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
# Copyright (C) 2012-2013 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 lzma Python module."""
|
|
from .. import util
|
|
import lzma
|
|
|
|
READ_SIZE_BYTES = 1024*1024
|
|
|
|
def extract_lzma(archive, compression, cmd, **kwargs):
|
|
"""Extract a LZMA archive with the lzma Python module."""
|
|
verbose = kwargs['verbose']
|
|
outdir = kwargs['outdir']
|
|
if verbose:
|
|
util.log_info('extracting %s...' % archive)
|
|
targetname = util.get_single_outfile(outdir, archive)
|
|
lzmafile = lzma.LZMAFile(archive)
|
|
try:
|
|
with open(targetname, 'wb') as targetfile:
|
|
data = lzmafile.read(READ_SIZE_BYTES)
|
|
while data:
|
|
targetfile.write(data)
|
|
data = lzmafile.read(READ_SIZE_BYTES)
|
|
finally:
|
|
lzmafile.close()
|
|
if verbose:
|
|
util.log_info('... extracted to %s' % targetname)
|
|
return None
|
|
|
|
|
|
def create_lzma(archive, compression, cmd, *args, **kwargs):
|
|
"""Create a LZMA archive with the lzma Python module."""
|
|
verbose = kwargs['verbose']
|
|
if verbose:
|
|
util.log_info('creating %s...' % archive)
|
|
if len(args) > 1:
|
|
util.log_error('multi-file compression not supported in Python lzma')
|
|
lzmafile = lzma.LZMAFile(archive, 'wb')
|
|
try:
|
|
filename = args[0]
|
|
with open(filename) as srcfile:
|
|
data = srcfile.read(READ_SIZE_BYTES)
|
|
while data:
|
|
lzmafile.write(data)
|
|
data = srcfile.read(READ_SIZE_BYTES)
|
|
if verbose:
|
|
util.log_info('... added %s' % filename)
|
|
finally:
|
|
lzmafile.close()
|
|
return None
|