/usr/lib/python3/dist-packages/diffoscope/comparators/ar.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 | # -*- coding: utf-8 -*-
#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2014-2015 Jérémy Bobbio <lunar@debian.org>
# Copyright © 2016 Ximin Luo <infinity0@pwned.gg>
#
# 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
from diffoscope.tools import tool_required
from diffoscope.difference import Difference
from .utils.file import File
from .utils.command import Command
from .utils.libarchive import LibarchiveContainer, list_libarchive
logger = logging.getLogger(__name__)
# TODO: this would also be useful for Go archives. Currently those are handled
# by StaticLibFile, but then readelf complains with "Error: Not an ELF file".
# ArFile gives slightly more reasonable output, e.g. a readable plain diff of
# the __.PKGDEF member which is just a text file containing the Go interface.
class ArContainer(LibarchiveContainer):
def get_adjusted_members(self):
members = list(super().get_adjusted_members())
known_ignores = {
"/": "this is the symbol table, already accounted for in other output",
"//": "this is the table for GNU long names, already accounted for in the archive filelist",
}
filtered_out = [p for p in members if p[0] in known_ignores]
if filtered_out:
for k, v in filtered_out:
logger.debug("ignored ar member '%s' because %s", k, known_ignores[k])
return [p for p in members if p[0] not in known_ignores]
class ArSymbolTableDumper(Command):
@tool_required('nm')
def cmdline(self):
return ['nm', '-s', self.path]
class ArFile(File):
DESCRIPTION = "ar(1) archives"
CONTAINER_CLASS = ArContainer
FILE_TYPE_RE = re.compile(r'\bar archive\b')
def compare_details(self, other, source=None):
return [Difference.from_command(ArSymbolTableDumper, self.path, other.path),
Difference.from_text_readers(list_libarchive(self.path),
list_libarchive(other.path),
self.path, other.path, source="file list")]
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