1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
# Copyright (C) 2012-2023 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 gzip Python module."""
# now gzip refers to the Python standard module, not the local one
import gzip
from .. import fileutil, util
READ_SIZE_BYTES = 1024 * 1024
def extract_gzip(archive, compression, cmd, verbosity, interactive, outdir):
"""Extract a GZIP archive with the gzip Python module."""
targetname = fileutil.get_single_outfile(outdir, archive)
try:
with gzip.GzipFile(archive) as gzipfile:
with open(targetname, 'wb') as targetfile:
data = gzipfile.read(READ_SIZE_BYTES)
while data:
targetfile.write(data)
data = gzipfile.read(READ_SIZE_BYTES)
except Exception as err:
msg = f"error extracting {archive} to {targetname}"
raise util.PatoolError(msg) from err
return
def create_gzip(archive, compression, cmd, verbosity, interactive, filenames):
"""Create a GZIP archive with the gzip Python module."""
if len(filenames) > 1:
raise util.PatoolError('multi-file compression not supported in Python gzip')
try:
with gzip.GzipFile(archive, 'wb') as gzipfile:
filename = filenames[0]
with open(filename, 'rb') as srcfile:
data = srcfile.read(READ_SIZE_BYTES)
while data:
gzipfile.write(data)
data = srcfile.read(READ_SIZE_BYTES)
except Exception as err:
raise util.PatoolError(f"error creating {archive}") from err
return
|
