/usr/lib/python3/dist-packages/diffoscope/comparators/utils/archive.py is in diffoscope 93ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | # -*- coding: utf-8 -*-
#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2016 Chris Lamb <lamby@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 os
import abc
import logging
from diffoscope.profiling import profile
from diffoscope.tempfiles import get_temporary_directory
from ..missing_file import MissingFile
from .file import File
from .container import Container
logger = logging.getLogger(__name__)
class Archive(Container, metaclass=abc.ABCMeta):
def __new__(cls, source, *args, **kwargs):
if isinstance(source, MissingFile):
return super(Container, MissingArchive).__new__(MissingArchive)
else:
return super(Container, cls).__new__(cls)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
with profile('open_archive', self):
self._archive = self.open_archive()
def __del__(self):
with profile('close_archive', self):
self.close_archive()
@property
def archive(self):
return self._archive
@abc.abstractmethod
def open_archive(self):
raise NotImplementedError()
@abc.abstractmethod
def close_archive(self):
raise NotImplementedError()
@abc.abstractmethod
def get_member_names(self):
raise NotImplementedError()
@abc.abstractmethod
def extract(self, member_name, dest_dir):
raise NotImplementedError()
def get_member(self, member_name):
return ArchiveMember(self, member_name)
def get_compressed_content_name(self, expected_extension):
basename = os.path.basename(self.source.name)
if not basename.endswith(expected_extension):
return "%s-content" % basename
return basename[:-len(expected_extension)]
class ArchiveMember(File):
def __init__(self, container, member_name):
super().__init__(container=container)
self._name = member_name
self._temp_dir = None
self._path = None
@property
def path(self):
if self._path is None:
logger.debug("Unpacking %s from %s", self._name, self.container.source.name)
assert self._temp_dir is None
self._temp_dir = get_temporary_directory()
with profile('container_extract', self.container):
self._path = self.container.extract(self._name, self._temp_dir.name)
return self._path
def cleanup(self):
if self._path is not None:
self._path = None
if self._temp_dir is not None:
try:
self._temp_dir.cleanup()
except FileNotFoundError:
pass
self._temp_dir = None
super().cleanup()
def is_directory(self):
return False
def is_symlink(self):
return False
def is_device(self):
return False
class MissingArchiveLikeObject(object):
def getnames(self):
return []
def list(self, *args, **kwargs):
return ''
def close(self):
pass
class MissingArchive(Archive):
@property
def source(self):
return None
def open_archive(self):
return MissingArchiveLikeObject()
def close_archive(self):
pass
def get_member_names(self):
return []
def extract(self, member_name, dest_dir):
# should never be called
raise NotImplementedError()
def get_member(self, member_name):
return MissingFile('/dev/null')
# Be nice to gzip and the likes
@property
def path(self):
return '/dev/null'
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