/usr/lib/python3/dist-packages/diffoscope/comparators/gzip.py is in diffoscope 93ubuntu1.
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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 55 56 57 58 59 60 61 | # -*- coding: utf-8 -*-
#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2014-2015 Jérémy Bobbio <lunar@debian.org>
#
# diffoscope 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.
#
# diffoscope 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 diffoscope. If not, see <https://www.gnu.org/licenses/>.
import re
import logging
import subprocess
from diffoscope.tools import tool_required
from .utils.file import File
from .utils.archive import Archive
logger = logging.getLogger(__name__)
class GzipContainer(Archive):
def open_archive(self):
return self
def close_archive(self):
pass
def get_member_names(self):
return [self.get_compressed_content_name('.gz')]
@tool_required('gzip')
def extract(self, member_name, dest_dir):
dest_path = self.get_path_name(dest_dir)
logger.debug('gzip extracting to %s', dest_path)
with open(dest_path, 'wb') as fp:
subprocess.check_call(
["gzip", "--decompress", "--stdout", self.source.path],
shell=False, stdout=fp, stderr=None)
return dest_path
class GzipFile(File):
DESCRIPTION = "Gzipped files"
CONTAINER_CLASS = GzipContainer
FILE_TYPE_RE = re.compile(r'^gzip compressed data\b')
# Work around file(1) Debian bug #876316
FALLBACK_FILE_EXTENSION_SUFFIX = ".gz"
FALLBACK_FILE_TYPE_HEADER_PREFIX = b"\x1f\x8b"
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