def iter_filtered_dir_entry(dir_entries, match_patterns, on_skip):
"""
Filter a list of DirEntryPath instances with the given pattern
:param dir_entries: list of DirEntryPath instances
:param match_patterns: used with Path.match()
e.g.: "__pycache__/*", "*.tmp", "*.cache"
:param on_skip: function that will be called if 'match_patterns' hits.
e.g.:
def on_skip(entry, pattern):
log.error("Skip pattern %r hit: %s" % (pattern, entry.path))
:return: yields None or DirEntryPath instances
"""
def match(dir_entry_path, match_patterns, on_skip):
for match_pattern in match_patterns:
if dir_entry_path.path_instance.match(match_pattern):
on_skip(dir_entry_path, match_pattern)
return True
return False
for entry in dir_entries:
try:
dir_entry_path = DirEntryPath(entry)
except FileNotFoundError as err:
# e.g.: A file was deleted after the first filesystem scan
# Will be obsolete if we use shadow-copy / snapshot function from filesystem
# see: https://github.com/jedie/PyHardLinkBackup/issues/6
log.error("Can't make DirEntryPath() instance: %s" % err)
continue
if match(dir_entry_path, match_patterns, on_skip):
yield None
else:
yield dir_entry_path
def test_symlink(self):
src_file = Path2("source_file.txt")
src_file.touch()
dst_file = Path2("destination.txt")
dst_file.symlink_to(src_file)
scan_result = list(Path2(".").scandir())
scan_result.sort(key=lambda x: x.path)
self.assertEqual([f.path for f in scan_result], ['./destination.txt', './source_file.txt'])
for dir_entry in scan_result:
dir_entry_path = DirEntryPath(dir_entry)
info = dir_entry_path.pformat()
# print(info)
if dir_entry_path.path == "./source_file.txt":
self.assertFalse(dir_entry_path.is_symlink)
self.assertTrue(dir_entry_path.is_file)
elif dir_entry_path.path == "./destination.txt":
self.assertTrue(dir_entry_path.is_symlink)
self.assertFalse(dir_entry_path.is_file)
else:
self.fail()
self.assertEqual(dir_entry_path.resolved_path, Path2(self.temp_root_path, "source_file.txt"))
# Create a broken symlink, by deleting the source file:
src_file.unlink()
scan_result = list(Path2(".").scandir())
self.assertEqual([f.path for f in scan_result], ['./destination.txt'])
dir_entry_path = DirEntryPath(scan_result[0])
info = dir_entry_path.pformat()
print(info)
self.assertEqual(dir_entry_path.path, "./destination.txt")
self.assertEqual(dir_entry_path.resolved_path, None) # <- broken, so can't be resolve
self.assertIsInstance(dir_entry_path.resolve_error, FileNotFoundError) # <- the error instance
self.assertTrue(dir_entry_path.is_symlink)
self.assertFalse(dir_entry_path.is_file)
def test_normal_file(self):
f = Path2("normal_file.txt")
f.touch()
self.assertTrue(f.is_file())
p = Path2(self.temp_root_path)
dir_entries = tuple(p.scandir())
print(dir_entries)
self.assertEqual(len(dir_entries), 1)
dir_entry = dir_entries[0]
dir_entry_path = DirEntryPath(dir_entry)
print(dir_entry_path.pformat())
self.assertEqual(dir_entry_path.is_symlink, False)
self.assertEqual(dir_entry_path.different_path, False)
self.assertEqual(
dir_entry_path.resolved_path,
Path2(Path2(p, f).extended_path)
)
self.assertEqual(dir_entry_path.resolve_error, None)
def test_directory_junction(self):
os.mkdir("dir1")
dir1 = Path2("dir1").resolve()
dir2 = Path2(self.temp_root_path, "dir2")
print(dir1.path)
print(dir2.path)
# mklink /d /j <destination> <source>
# Strange that first is destination and second is the source path !
txt = self.mklink("/d", "/j", "dir2", "dir1")
print(txt)
self.assertIn("dir2 <<===>> dir1", txt)
p = Path2(self.temp_root_path)
dir_entries = list(p.scandir())
dir_entries.sort(key=lambda x: x.name)
print(dir_entries)
self.assertEqual(repr(dir_entries), "[<DirEntry 'dir1'>, <DirEntry 'dir2'>]")
dir_entry1, dir_entry2 = dir_entries
self.assertEqual(dir_entry1.name, "dir1")
self.assertEqual(dir_entry2.name, "dir2")
dir_entry_path1 = DirEntryPath(dir_entry1)
print(dir_entry_path1.pformat())
self.assertEqual(dir_entry_path1.is_symlink, False)
self.assertEqual(dir_entry_path1.different_path, False)
self.assertEqual(
dir_entry_path1.resolved_path,
Path2(Path2(self.temp_root_path, "dir1").extended_path)
)
self.assertEqual(dir_entry_path1.resolve_error, None)
dir_entry_path2 = DirEntryPath(dir_entry2)
print(dir_entry_path2.pformat())
self.assertEqual(dir_entry_path2.is_symlink, False)
self.assertEqual(dir_entry_path2.different_path, True) # <<--- because of junction
self.assertEqual( # pointed to dir1 !
dir_entry_path2.resolved_path,
Path2(Path2(self.temp_root_path, "dir1").extended_path)
)
self.assertEqual(dir_entry_path2.resolve_error, None)
# remove junction source and try again
# dir1.unlink() # Will not work: PermissionError: [WinError 5] Zugriff verweigert
dir1.rename("new_name") # Will also break the junction ;)
# check again:
dir_entry_path2 = DirEntryPath(
dir_entry2,
onerror=print # will be called, because resolve can't be done.
)
print(dir_entry_path2.pformat())
self.assertEqual(dir_entry_path2.is_symlink, False)
self.assertEqual(dir_entry_path2.different_path, True) # <<--- because of junction
# can't be resole, because source was renamed:
self.assertEqual(dir_entry_path2.resolved_path, None)
self.assertIsInstance(dir_entry_path2.resolve_error, FileNotFoundError)
def test_normal_file(tmp_path):
"""
Test DirEntryPath() on all platforms
"""
f = Path2(tmp_path, "normal_file.txt")
f.touch()
assert f.is_file() is True
p = Path2(tmp_path)
dir_entries = tuple(p.scandir())
print(dir_entries)
assert len(dir_entries) == 1
dir_entry = dir_entries[0]
dir_entry_path = DirEntryPath(dir_entry)
print(dir_entry_path.pformat())
assert dir_entry_path.is_symlink is False
assert dir_entry_path.different_path is False
assert dir_entry_path.resolved_path == Path2(Path2(p, f).extended_path)
assert dir_entry_path.resolve_error is None
def test_symlink(self, tmp_path):
os.chdir(tmp_path)
src_file = Path2("source_file.txt")
src_file.touch()
dst_file = Path2("destination.txt")
dst_file.symlink_to(src_file)
scan_result = list(Path2(".").scandir())
scan_result.sort(key=lambda x: x.path)
self.assertEqual([f.path for f in scan_result],
['./destination.txt', './source_file.txt'])
for dir_entry in scan_result:
dir_entry_path = DirEntryPath(dir_entry)
info = dir_entry_path.pformat()
# print(info)
if dir_entry_path.path == "./source_file.txt":
self.assertFalse(dir_entry_path.is_symlink)
self.assertTrue(dir_entry_path.is_file)
elif dir_entry_path.path == "./destination.txt":
self.assertTrue(dir_entry_path.is_symlink)
self.assertFalse(dir_entry_path.is_file)
else:
self.fail()
self.assertEqual(dir_entry_path.resolved_path,
Path2(self.temp_root_path, "source_file.txt"))
# Create a broken symlink, by deleting the source file:
src_file.unlink()
scan_result = list(Path2(".").scandir())
self.assertEqual([f.path for f in scan_result], ['./destination.txt'])
dir_entry_path = DirEntryPath(scan_result[0])
info = dir_entry_path.pformat()
print(info)
self.assertEqual(dir_entry_path.path, "./destination.txt")
self.assertEqual(dir_entry_path.resolved_path,
None) # <- broken, so can't be resolve
self.assertIsInstance(dir_entry_path.resolve_error,
FileNotFoundError) # <- the error instance
self.assertTrue(dir_entry_path.is_symlink)
self.assertFalse(dir_entry_path.is_file)
def test_directory_junction(self, tmp_path):
os.chdir(tmp_path)
os.mkdir("dir1")
dir1 = Path2("dir1").resolve()
dir2 = Path2(self.temp_root_path, "dir2")
print(dir1.path)
print(dir2.path)
# mklink /d /j <destination> <source>
# Strange that first is destination and second is the source path !
txt = self.mklink("/d", "/j", "dir2", "dir1")
print(txt)
self.assertIn("dir2 <<===>> dir1", txt)
p = Path2(self.temp_root_path)
dir_entries = list(p.scandir())
dir_entries.sort(key=lambda x: x.name)
print(dir_entries)
self.assertEqual(repr(dir_entries),
"[<DirEntry 'dir1'>, <DirEntry 'dir2'>]")
dir_entry1, dir_entry2 = dir_entries
self.assertEqual(dir_entry1.name, "dir1")
self.assertEqual(dir_entry2.name, "dir2")
dir_entry_path1 = DirEntryPath(dir_entry1)
print(dir_entry_path1.pformat())
self.assertEqual(dir_entry_path1.is_symlink, False)
self.assertEqual(dir_entry_path1.different_path, False)
self.assertEqual(
dir_entry_path1.resolved_path,
Path2(Path2(self.temp_root_path, "dir1").extended_path))
self.assertEqual(dir_entry_path1.resolve_error, None)
dir_entry_path2 = DirEntryPath(dir_entry2)
print(dir_entry_path2.pformat())
self.assertEqual(dir_entry_path2.is_symlink, False)
self.assertEqual(dir_entry_path2.different_path,
True) # <<--- because of junction
self.assertEqual( # pointed to dir1 !
dir_entry_path2.resolved_path,
Path2(Path2(self.temp_root_path, "dir1").extended_path))
self.assertEqual(dir_entry_path2.resolve_error, None)
# remove junction source and try again
# dir1.unlink() # Will not work: PermissionError: [WinError 5] Zugriff verweigert
dir1.rename("new_name") # Will also break the junction ;)
# check again:
dir_entry_path2 = DirEntryPath(
dir_entry2,
onerror=print # will be called, because resolve can't be done.
)
print(dir_entry_path2.pformat())
self.assertEqual(dir_entry_path2.is_symlink, False)
self.assertEqual(dir_entry_path2.different_path,
True) # <<--- because of junction
# can't be resole, because source was renamed:
self.assertEqual(dir_entry_path2.resolved_path, None)
self.assertIsInstance(dir_entry_path2.resolve_error, FileNotFoundError)
