/usr/lib/python3/dist-packages/diffoscope/comparators/directory.py is in diffoscope 93ubuntu1.
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#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 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 os
import re
import logging
import subprocess
import collections
import itertools
from diffoscope.exc import RequiredToolNotFound
from diffoscope.tools import tool_required
from diffoscope.config import Config
from diffoscope.progress import Progress
from diffoscope.difference import Difference
from .binary import FilesystemFile
from .utils.command import Command
from .utils.container import Container
logger = logging.getLogger(__name__)
def list_files(path):
path = os.path.realpath(path)
all_files = []
for root, dirs, names in os.walk(path):
all_files.extend([os.path.join(root[len(path) + 1:], dir) for dir in dirs])
all_files.extend([os.path.join(root[len(path) + 1:], name) for name in names])
all_files.sort()
return all_files
if os.uname()[0] == 'FreeBSD':
class Stat(Command):
@tool_required('stat')
def cmdline(self):
return [
'stat',
'-t', '%Y-%m-%d %H:%M:%S',
'-f', '%Sp %l %Su %Sg %z %Sm %k %b %#Xf',
self.path,
]
else:
class Stat(Command):
@tool_required('stat')
def cmdline(self):
return ['stat', self.path]
FILE_RE = re.compile(r'^\s*File:.*$')
DEVICE_RE = re.compile(r'Device: [0-9a-f]+h/[0-9]+d\s+')
INODE_RE = re.compile(r'Inode: [0-9]+\s+')
ACCESS_TIME_RE = re.compile(r'^Access: [0-9]{4}-[0-9]{2}-[0-9]{2}.*$')
CHANGE_TIME_RE = re.compile(r'^Change: [0-9]{4}-[0-9]{2}-[0-9]{2}.*$')
def filter(self, line):
line = line.decode('utf-8')
line = Stat.FILE_RE.sub('', line)
line = Stat.DEVICE_RE.sub('', line)
line = Stat.INODE_RE.sub('', line)
line = Stat.ACCESS_TIME_RE.sub('', line)
line = Stat.CHANGE_TIME_RE.sub('', line)
return line.encode('utf-8')
@tool_required('lsattr')
def lsattr(path):
"""
NB. Difficult to replace with in-Python version. See
<https://stackoverflow.com/questions/35501249/python-get-linux-file-immutable-attribute/38092961#38092961>
"""
try:
output = subprocess.check_output(
['lsattr', '-d', path],
shell=False,
stderr=subprocess.STDOUT,
).decode('utf-8')
return output.split()[0]
except subprocess.CalledProcessError as e:
if e.returncode == 1:
# filesystem doesn't support xattrs
return ''
class Getfacl(Command):
@tool_required('getfacl')
def cmdline(self):
osname = os.uname()[0]
if osname == 'FreeBSD':
return ['getfacl', '-q', '-h', self.path]
return ['getfacl', '-p', '-c', self.path]
def xattr(path1, path2):
try:
import xattr as xattr_
except ImportError:
return None
# Support the case where the python3-xattr package is installed but
# python3-pyxattr is not; python3-xattr has an xattr class that can be used
# like a dict.
try:
get_all = xattr_.get_all
except AttributeError:
get_all = lambda x: xattr_.xattr(x).items()
def fn(x):
return '\n'.join('{}: {}'.format(
k.decode('utf-8', 'ignore'),
v.decode('utf-8', 'ignore'),
) for k, v in get_all(x))
return Difference.from_text(
fn(path1), fn(path2), path1, path2, source='extended file attributes',
)
def compare_meta(path1, path2):
if Config().exclude_directory_metadata:
logger.debug("Excluding directory metadata for paths (%s, %s)", path1, path2)
return []
logger.debug('compare_meta(%s, %s)', path1, path2)
differences = []
# Don't run any commands if any of the paths do not exist
if not os.path.exists(path1) or not os.path.exists(path2):
return differences
try:
differences.append(Difference.from_command(Stat, path1, path2))
except RequiredToolNotFound:
logger.error("Unable to find 'stat'! Is PATH wrong?")
if os.path.islink(path1) or os.path.islink(path2):
return [d for d in differences if d is not None]
try:
differences.append(Difference.from_command(Getfacl, path1, path2))
except RequiredToolNotFound:
logger.warning("Unable to find 'getfacl', some directory metadata differences might not be noticed.")
try:
lsattr1 = lsattr(path1)
lsattr2 = lsattr(path2)
differences.append(Difference.from_text(
lsattr1,
lsattr2,
path1,
path2,
source='lsattr',
))
except RequiredToolNotFound:
logger.info("Unable to find 'lsattr', some directory metadata differences might not be noticed.")
differences.append(xattr(path1, path2))
return [d for d in differences if d is not None]
def compare_directories(path1, path2, source=None):
return FilesystemDirectory(path1).compare(FilesystemDirectory(path2))
class Directory(object):
DESCRIPTION = "directories"
@classmethod
def recognizes(cls, file):
return file.is_directory()
@classmethod
def fallback_recognizes(cls, file):
return False
class FilesystemDirectory(Directory):
def __init__(self, path):
self._path = path
@property
def path(self):
return self._path
@property
def name(self):
return self._path
@property
def as_container(self):
if not hasattr(self, '_as_container'):
self._as_container = DirectoryContainer(self)
return self._as_container
def is_directory(self):
return True
def has_same_content_as(self, other):
# no shortcut
return False
def compare(self, other, source=None):
differences = []
listing_diff = Difference.from_text(
'\n'.join(list_files(self.path)),
'\n'.join(list_files(other.path)),
self.path,
other.path,
source='file list',
)
if listing_diff:
differences.append(listing_diff)
differences.extend(compare_meta(self.name, other.name))
my_container = DirectoryContainer(self)
other_container = DirectoryContainer(other)
differences.extend(my_container.compare(other_container))
if not differences:
return None
difference = Difference(None, self.path, other.path, source)
difference.add_details(differences)
return difference
class DirectoryContainer(Container):
def get_member_names(self):
return sorted(os.listdir(self.source.path or '.'))
def get_member(self, member_name):
member_path = os.path.join(self.source.path, member_name)
if not os.path.islink(member_path) and os.path.isdir(member_path):
return FilesystemDirectory(member_path)
return FilesystemFile(
os.path.join(self.source.path, member_name),
container=self,
)
def comparisons(self, other):
my_members = collections.OrderedDict(self.get_adjusted_members_sizes())
other_members = collections.OrderedDict(other.get_adjusted_members_sizes())
total_size = sum(x[1] for x in my_members.values()) + sum(x[1] for x in other_members.values())
to_compare = set(my_members.keys()).intersection(other_members.keys())
with Progress(total_size) as p:
for name in sorted(to_compare):
my_file, my_size = my_members[name]
other_file, other_size = other_members[name]
p.begin_step(my_size + other_size, msg=name)
yield my_file, other_file, name
def compare(self, other, source=None):
from .utils.compare import compare_files
def compare_pair(file1, file2, source):
inner_difference = compare_files(file1, file2, source=source)
meta_differences = compare_meta(file1.name, file2.name)
if meta_differences and not inner_difference:
inner_difference = Difference(None, file1.path, file2.path)
if inner_difference:
inner_difference.add_details(meta_differences)
return inner_difference
return filter(
None,
itertools.starmap(compare_pair, self.comparisons(other)),
)
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