/usr/lib/python3/dist-packages/diffoscope/comparators/git.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 | # -*- 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 re
import os
import struct
import binascii
from diffoscope.difference import Difference
from .utils.file import File
class GitIndexFile(File):
DESCRIPTION = "Git repositories"
FILE_TYPE_RE = re.compile(r'^Git index')
def compare_details(self, other, source=None):
return [Difference.from_text(
describe_index(self.path),
describe_index(other.path),
self.path,
other.path,
)]
def parse_index(f):
_, version = struct.unpack('>LL', f.read(4 * 2))
return {
'version': version,
'entries': list(parse_entries(f)),
}
def parse_entries(f):
num_entries = struct.unpack('>L', f.read(4))[0]
for _ in range(num_entries):
x = {}
pos = f.tell()
x['ctime'], x['ctime_nano'], x['mtime'], x['mtime_nano'], \
x['dev'], x['inode'], x['mode'], x['uid'], x['gid'], \
x['size'], x['sha'], x['flags'] = \
struct.unpack('>LLLLLLLLLL20sH', f.read((4 * 10) + 20 + 2))
x['path'] = f.read(x['flags'] & 0x0fff)
f.read((pos + ((f.tell() - pos + 8) & ~7)) - f.tell())
yield x
def describe_index(filename):
with open(filename, 'rb') as f:
index = parse_index(f)
return """
Version: {version}
Entries:
{entries_fmt}
""".format(
entries_fmt=''.join(describe_entry(x) for x in index['entries']),
**index
)
def describe_entry(x):
return """
Path: {x[path]}
SHA: {hexsha}
Size: {x[size]}
Flags: {x[flags]:#b}
User ID: {x[uid]}
Group ID: {x[gid]}
Created: {x[ctime]}.{x[ctime_nano]}
Modified: {x[mtime]}.{x[mtime_nano]}
Inode: {x[inode]}
Device ID: ({major}, {minor})
""".format(
x=x,
major=os.major(x['dev']),
minor=os.minor(x['dev']),
hexsha=binascii.b2a_hex(x['sha']).decode('utf-8'),
)
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