mirror of
https://github.com/python/cpython.git
synced 2025-07-08 03:45:36 +00:00
823a38a960
Remove `self.joinpath('')` call that should have been removed in 6313cdde.
This makes `PathBase.glob('')` yield itself *without* adding a trailing slash. It's hard to say whether this is more or less correct, but at least everything else is faster, and there's no behaviour change in the public classes where empty glob patterns are disallowed.
1064 lines
37 KiB
Python
1064 lines
37 KiB
Python
"""
|
|
Abstract base classes for rich path objects.
|
|
|
|
This module is published as a PyPI package called "pathlib-abc".
|
|
|
|
This module is also a *PRIVATE* part of the Python standard library, where
|
|
it's developed alongside pathlib. If it finds success and maturity as a PyPI
|
|
package, it could become a public part of the standard library.
|
|
|
|
Two base classes are defined here -- PurePathBase and PathBase -- that
|
|
resemble pathlib's PurePath and Path respectively.
|
|
"""
|
|
|
|
import functools
|
|
from errno import ENOENT, ENOTDIR, EBADF, ELOOP, EINVAL
|
|
from stat import S_ISDIR, S_ISLNK, S_ISREG, S_ISSOCK, S_ISBLK, S_ISCHR, S_ISFIFO
|
|
|
|
#
|
|
# Internals
|
|
#
|
|
|
|
_WINERROR_NOT_READY = 21 # drive exists but is not accessible
|
|
_WINERROR_INVALID_NAME = 123 # fix for bpo-35306
|
|
_WINERROR_CANT_RESOLVE_FILENAME = 1921 # broken symlink pointing to itself
|
|
|
|
# EBADF - guard against macOS `stat` throwing EBADF
|
|
_IGNORED_ERRNOS = (ENOENT, ENOTDIR, EBADF, ELOOP)
|
|
|
|
_IGNORED_WINERRORS = (
|
|
_WINERROR_NOT_READY,
|
|
_WINERROR_INVALID_NAME,
|
|
_WINERROR_CANT_RESOLVE_FILENAME)
|
|
|
|
def _ignore_error(exception):
|
|
return (getattr(exception, 'errno', None) in _IGNORED_ERRNOS or
|
|
getattr(exception, 'winerror', None) in _IGNORED_WINERRORS)
|
|
|
|
|
|
@functools.cache
|
|
def _is_case_sensitive(pathmod):
|
|
return pathmod.normcase('Aa') == 'Aa'
|
|
|
|
#
|
|
# Globbing helpers
|
|
#
|
|
|
|
re = glob = None
|
|
|
|
|
|
@functools.lru_cache(maxsize=512)
|
|
def _compile_pattern(pat, sep, case_sensitive, recursive=True):
|
|
"""Compile given glob pattern to a re.Pattern object (observing case
|
|
sensitivity)."""
|
|
global re, glob
|
|
if re is None:
|
|
import re, glob
|
|
|
|
flags = re.NOFLAG if case_sensitive else re.IGNORECASE
|
|
regex = glob.translate(pat, recursive=recursive, include_hidden=True, seps=sep)
|
|
return re.compile(regex, flags=flags).match
|
|
|
|
|
|
def _select_special(paths, part):
|
|
"""Yield special literal children of the given paths."""
|
|
for path in paths:
|
|
yield path._make_child_relpath(part)
|
|
|
|
|
|
def _select_children(parent_paths, dir_only, follow_symlinks, match):
|
|
"""Yield direct children of given paths, filtering by name and type."""
|
|
if follow_symlinks is None:
|
|
follow_symlinks = True
|
|
for parent_path in parent_paths:
|
|
try:
|
|
# We must close the scandir() object before proceeding to
|
|
# avoid exhausting file descriptors when globbing deep trees.
|
|
with parent_path._scandir() as scandir_it:
|
|
entries = list(scandir_it)
|
|
except OSError:
|
|
pass
|
|
else:
|
|
for entry in entries:
|
|
if dir_only:
|
|
try:
|
|
if not entry.is_dir(follow_symlinks=follow_symlinks):
|
|
continue
|
|
except OSError:
|
|
continue
|
|
if match(entry.name):
|
|
yield parent_path._make_child_entry(entry)
|
|
|
|
|
|
def _select_recursive(parent_paths, dir_only, follow_symlinks):
|
|
"""Yield given paths and all their subdirectories, recursively."""
|
|
if follow_symlinks is None:
|
|
follow_symlinks = False
|
|
for parent_path in parent_paths:
|
|
paths = [parent_path]
|
|
while paths:
|
|
path = paths.pop()
|
|
yield path
|
|
try:
|
|
# We must close the scandir() object before proceeding to
|
|
# avoid exhausting file descriptors when globbing deep trees.
|
|
with path._scandir() as scandir_it:
|
|
entries = list(scandir_it)
|
|
except OSError:
|
|
pass
|
|
else:
|
|
for entry in entries:
|
|
try:
|
|
if entry.is_dir(follow_symlinks=follow_symlinks):
|
|
paths.append(path._make_child_entry(entry))
|
|
continue
|
|
except OSError:
|
|
pass
|
|
if not dir_only:
|
|
yield path._make_child_entry(entry)
|
|
|
|
|
|
def _select_unique(paths):
|
|
"""Yields the given paths, filtering out duplicates."""
|
|
yielded = set()
|
|
try:
|
|
for path in paths:
|
|
path_str = str(path)
|
|
if path_str not in yielded:
|
|
yield path
|
|
yielded.add(path_str)
|
|
finally:
|
|
yielded.clear()
|
|
|
|
|
|
class UnsupportedOperation(NotImplementedError):
|
|
"""An exception that is raised when an unsupported operation is called on
|
|
a path object.
|
|
"""
|
|
pass
|
|
|
|
|
|
class PathModuleBase:
|
|
"""Base class for path modules, which do low-level path manipulation.
|
|
|
|
Path modules provide a subset of the os.path API, specifically those
|
|
functions needed to provide PurePathBase functionality. Each PurePathBase
|
|
subclass references its path module via a 'pathmod' class attribute.
|
|
|
|
Every method in this base class raises an UnsupportedOperation exception.
|
|
"""
|
|
|
|
@classmethod
|
|
def _unsupported(cls, attr):
|
|
raise UnsupportedOperation(f"{cls.__name__}.{attr} is unsupported")
|
|
|
|
@property
|
|
def sep(self):
|
|
"""The character used to separate path components."""
|
|
self._unsupported('sep')
|
|
|
|
def join(self, path, *paths):
|
|
"""Join path segments."""
|
|
self._unsupported('join()')
|
|
|
|
def split(self, path):
|
|
"""Split the path into a pair (head, tail), where *head* is everything
|
|
before the final path separator, and *tail* is everything after.
|
|
Either part may be empty.
|
|
"""
|
|
self._unsupported('split()')
|
|
|
|
def splitdrive(self, path):
|
|
"""Split the path into a 2-item tuple (drive, tail), where *drive* is
|
|
a device name or mount point, and *tail* is everything after the
|
|
drive. Either part may be empty."""
|
|
self._unsupported('splitdrive()')
|
|
|
|
def normcase(self, path):
|
|
"""Normalize the case of the path."""
|
|
self._unsupported('normcase()')
|
|
|
|
def isabs(self, path):
|
|
"""Returns whether the path is absolute, i.e. unaffected by the
|
|
current directory or drive."""
|
|
self._unsupported('isabs()')
|
|
|
|
|
|
class PurePathBase:
|
|
"""Base class for pure path objects.
|
|
|
|
This class *does not* provide several magic methods that are defined in
|
|
its subclass PurePath. They are: __fspath__, __bytes__, __reduce__,
|
|
__hash__, __eq__, __lt__, __le__, __gt__, __ge__. Its initializer and path
|
|
joining methods accept only strings, not os.PathLike objects more broadly.
|
|
"""
|
|
|
|
__slots__ = (
|
|
# The `_raw_path` slot store a joined string path. This is set in the
|
|
# `__init__()` method.
|
|
'_raw_path',
|
|
|
|
# The '_resolving' slot stores a boolean indicating whether the path
|
|
# is being processed by `PathBase.resolve()`. This prevents duplicate
|
|
# work from occurring when `resolve()` calls `stat()` or `readlink()`.
|
|
'_resolving',
|
|
)
|
|
pathmod = PathModuleBase()
|
|
|
|
def __init__(self, path, *paths):
|
|
self._raw_path = self.pathmod.join(path, *paths) if paths else path
|
|
self._resolving = False
|
|
|
|
def with_segments(self, *pathsegments):
|
|
"""Construct a new path object from any number of path-like objects.
|
|
Subclasses may override this method to customize how new path objects
|
|
are created from methods like `iterdir()`.
|
|
"""
|
|
return type(self)(*pathsegments)
|
|
|
|
def __str__(self):
|
|
"""Return the string representation of the path, suitable for
|
|
passing to system calls."""
|
|
return self._raw_path
|
|
|
|
def as_posix(self):
|
|
"""Return the string representation of the path with forward (/)
|
|
slashes."""
|
|
return str(self).replace(self.pathmod.sep, '/')
|
|
|
|
@property
|
|
def drive(self):
|
|
"""The drive prefix (letter or UNC path), if any."""
|
|
return self.pathmod.splitdrive(self.anchor)[0]
|
|
|
|
@property
|
|
def root(self):
|
|
"""The root of the path, if any."""
|
|
return self.pathmod.splitdrive(self.anchor)[1]
|
|
|
|
@property
|
|
def anchor(self):
|
|
"""The concatenation of the drive and root, or ''."""
|
|
return self._stack[0]
|
|
|
|
@property
|
|
def name(self):
|
|
"""The final path component, if any."""
|
|
return self.pathmod.split(self._raw_path)[1]
|
|
|
|
@property
|
|
def suffix(self):
|
|
"""
|
|
The final component's last suffix, if any.
|
|
|
|
This includes the leading period. For example: '.txt'
|
|
"""
|
|
name = self.name
|
|
i = name.rfind('.')
|
|
if 0 < i < len(name) - 1:
|
|
return name[i:]
|
|
else:
|
|
return ''
|
|
|
|
@property
|
|
def suffixes(self):
|
|
"""
|
|
A list of the final component's suffixes, if any.
|
|
|
|
These include the leading periods. For example: ['.tar', '.gz']
|
|
"""
|
|
name = self.name
|
|
if name.endswith('.'):
|
|
return []
|
|
name = name.lstrip('.')
|
|
return ['.' + suffix for suffix in name.split('.')[1:]]
|
|
|
|
@property
|
|
def stem(self):
|
|
"""The final path component, minus its last suffix."""
|
|
name = self.name
|
|
i = name.rfind('.')
|
|
if 0 < i < len(name) - 1:
|
|
return name[:i]
|
|
else:
|
|
return name
|
|
|
|
def with_name(self, name):
|
|
"""Return a new path with the file name changed."""
|
|
split = self.pathmod.split
|
|
if split(name)[0]:
|
|
raise ValueError(f"Invalid name {name!r}")
|
|
return self.with_segments(split(self._raw_path)[0], name)
|
|
|
|
def with_stem(self, stem):
|
|
"""Return a new path with the stem changed."""
|
|
return self.with_name(stem + self.suffix)
|
|
|
|
def with_suffix(self, suffix):
|
|
"""Return a new path with the file suffix changed. If the path
|
|
has no suffix, add given suffix. If the given suffix is an empty
|
|
string, remove the suffix from the path.
|
|
"""
|
|
if not suffix:
|
|
return self.with_name(self.stem)
|
|
elif suffix.startswith('.') and len(suffix) > 1:
|
|
return self.with_name(self.stem + suffix)
|
|
else:
|
|
raise ValueError(f"Invalid suffix {suffix!r}")
|
|
|
|
def relative_to(self, other, *, walk_up=False):
|
|
"""Return the relative path to another path identified by the passed
|
|
arguments. If the operation is not possible (because this is not
|
|
related to the other path), raise ValueError.
|
|
|
|
The *walk_up* parameter controls whether `..` may be used to resolve
|
|
the path.
|
|
"""
|
|
if not isinstance(other, PurePathBase):
|
|
other = self.with_segments(other)
|
|
anchor0, parts0 = self._stack
|
|
anchor1, parts1 = other._stack
|
|
if isinstance(anchor0, str) != isinstance(anchor1, str):
|
|
raise TypeError(f"{self._raw_path!r} and {other._raw_path!r} have different types")
|
|
if anchor0 != anchor1:
|
|
raise ValueError(f"{self._raw_path!r} and {other._raw_path!r} have different anchors")
|
|
while parts0 and parts1 and parts0[-1] == parts1[-1]:
|
|
parts0.pop()
|
|
parts1.pop()
|
|
for part in parts1:
|
|
if not part or part == '.':
|
|
pass
|
|
elif not walk_up:
|
|
raise ValueError(f"{self._raw_path!r} is not in the subpath of {other._raw_path!r}")
|
|
elif part == '..':
|
|
raise ValueError(f"'..' segment in {other._raw_path!r} cannot be walked")
|
|
else:
|
|
parts0.append('..')
|
|
return self.with_segments('', *reversed(parts0))
|
|
|
|
def is_relative_to(self, other):
|
|
"""Return True if the path is relative to another path or False.
|
|
"""
|
|
if not isinstance(other, PurePathBase):
|
|
other = self.with_segments(other)
|
|
anchor0, parts0 = self._stack
|
|
anchor1, parts1 = other._stack
|
|
if isinstance(anchor0, str) != isinstance(anchor1, str):
|
|
raise TypeError(f"{self._raw_path!r} and {other._raw_path!r} have different types")
|
|
if anchor0 != anchor1:
|
|
return False
|
|
while parts0 and parts1 and parts0[-1] == parts1[-1]:
|
|
parts0.pop()
|
|
parts1.pop()
|
|
for part in parts1:
|
|
if part and part != '.':
|
|
return False
|
|
return True
|
|
|
|
@property
|
|
def parts(self):
|
|
"""An object providing sequence-like access to the
|
|
components in the filesystem path."""
|
|
anchor, parts = self._stack
|
|
if anchor:
|
|
parts.append(anchor)
|
|
return tuple(reversed(parts))
|
|
|
|
def joinpath(self, *pathsegments):
|
|
"""Combine this path with one or several arguments, and return a
|
|
new path representing either a subpath (if all arguments are relative
|
|
paths) or a totally different path (if one of the arguments is
|
|
anchored).
|
|
"""
|
|
return self.with_segments(self._raw_path, *pathsegments)
|
|
|
|
def __truediv__(self, key):
|
|
try:
|
|
return self.with_segments(self._raw_path, key)
|
|
except TypeError:
|
|
return NotImplemented
|
|
|
|
def __rtruediv__(self, key):
|
|
try:
|
|
return self.with_segments(key, self._raw_path)
|
|
except TypeError:
|
|
return NotImplemented
|
|
|
|
@property
|
|
def _stack(self):
|
|
"""
|
|
Split the path into a 2-tuple (anchor, parts), where *anchor* is the
|
|
uppermost parent of the path (equivalent to path.parents[-1]), and
|
|
*parts* is a reversed list of parts following the anchor.
|
|
"""
|
|
split = self.pathmod.split
|
|
path = self._raw_path
|
|
parent, name = split(path)
|
|
names = []
|
|
while path != parent:
|
|
names.append(name)
|
|
path = parent
|
|
parent, name = split(path)
|
|
return path, names
|
|
|
|
@property
|
|
def parent(self):
|
|
"""The logical parent of the path."""
|
|
path = self._raw_path
|
|
parent = self.pathmod.split(path)[0]
|
|
if path != parent:
|
|
parent = self.with_segments(parent)
|
|
parent._resolving = self._resolving
|
|
return parent
|
|
return self
|
|
|
|
@property
|
|
def parents(self):
|
|
"""A sequence of this path's logical parents."""
|
|
split = self.pathmod.split
|
|
path = self._raw_path
|
|
parent = split(path)[0]
|
|
parents = []
|
|
while path != parent:
|
|
parents.append(self.with_segments(parent))
|
|
path = parent
|
|
parent = split(path)[0]
|
|
return tuple(parents)
|
|
|
|
def is_absolute(self):
|
|
"""True if the path is absolute (has both a root and, if applicable,
|
|
a drive)."""
|
|
return self.pathmod.isabs(self._raw_path)
|
|
|
|
@property
|
|
def _pattern_stack(self):
|
|
"""Stack of path components, to be used with patterns in glob()."""
|
|
anchor, parts = self._stack
|
|
if anchor:
|
|
raise NotImplementedError("Non-relative patterns are unsupported")
|
|
return parts
|
|
|
|
@property
|
|
def _pattern_str(self):
|
|
"""The path expressed as a string, for use in pattern-matching."""
|
|
return str(self)
|
|
|
|
def match(self, path_pattern, *, case_sensitive=None):
|
|
"""
|
|
Return True if this path matches the given pattern. If the pattern is
|
|
relative, matching is done from the right; otherwise, the entire path
|
|
is matched. The recursive wildcard '**' is *not* supported by this
|
|
method.
|
|
"""
|
|
if not isinstance(path_pattern, PurePathBase):
|
|
path_pattern = self.with_segments(path_pattern)
|
|
if case_sensitive is None:
|
|
case_sensitive = _is_case_sensitive(self.pathmod)
|
|
sep = path_pattern.pathmod.sep
|
|
path_parts = self.parts[::-1]
|
|
pattern_parts = path_pattern.parts[::-1]
|
|
if not pattern_parts:
|
|
raise ValueError("empty pattern")
|
|
if len(path_parts) < len(pattern_parts):
|
|
return False
|
|
if len(path_parts) > len(pattern_parts) and path_pattern.anchor:
|
|
return False
|
|
for path_part, pattern_part in zip(path_parts, pattern_parts):
|
|
match = _compile_pattern(pattern_part, sep, case_sensitive, recursive=False)
|
|
if match(path_part) is None:
|
|
return False
|
|
return True
|
|
|
|
def full_match(self, pattern, *, case_sensitive=None):
|
|
"""
|
|
Return True if this path matches the given glob-style pattern. The
|
|
pattern is matched against the entire path.
|
|
"""
|
|
if not isinstance(pattern, PurePathBase):
|
|
pattern = self.with_segments(pattern)
|
|
if case_sensitive is None:
|
|
case_sensitive = _is_case_sensitive(self.pathmod)
|
|
match = _compile_pattern(pattern._pattern_str, pattern.pathmod.sep, case_sensitive)
|
|
return match(self._pattern_str) is not None
|
|
|
|
|
|
|
|
class PathBase(PurePathBase):
|
|
"""Base class for concrete path objects.
|
|
|
|
This class provides dummy implementations for many methods that derived
|
|
classes can override selectively; the default implementations raise
|
|
UnsupportedOperation. The most basic methods, such as stat() and open(),
|
|
directly raise UnsupportedOperation; these basic methods are called by
|
|
other methods such as is_dir() and read_text().
|
|
|
|
The Path class derives this class to implement local filesystem paths.
|
|
Users may derive their own classes to implement virtual filesystem paths,
|
|
such as paths in archive files or on remote storage systems.
|
|
"""
|
|
__slots__ = ()
|
|
|
|
# Maximum number of symlinks to follow in resolve()
|
|
_max_symlinks = 40
|
|
|
|
@classmethod
|
|
def _unsupported(cls, method_name):
|
|
msg = f"{cls.__name__}.{method_name}() is unsupported"
|
|
raise UnsupportedOperation(msg)
|
|
|
|
def stat(self, *, follow_symlinks=True):
|
|
"""
|
|
Return the result of the stat() system call on this path, like
|
|
os.stat() does.
|
|
"""
|
|
self._unsupported("stat")
|
|
|
|
def lstat(self):
|
|
"""
|
|
Like stat(), except if the path points to a symlink, the symlink's
|
|
status information is returned, rather than its target's.
|
|
"""
|
|
return self.stat(follow_symlinks=False)
|
|
|
|
|
|
# Convenience functions for querying the stat results
|
|
|
|
def exists(self, *, follow_symlinks=True):
|
|
"""
|
|
Whether this path exists.
|
|
|
|
This method normally follows symlinks; to check whether a symlink exists,
|
|
add the argument follow_symlinks=False.
|
|
"""
|
|
try:
|
|
self.stat(follow_symlinks=follow_symlinks)
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
return False
|
|
except ValueError:
|
|
# Non-encodable path
|
|
return False
|
|
return True
|
|
|
|
def is_dir(self, *, follow_symlinks=True):
|
|
"""
|
|
Whether this path is a directory.
|
|
"""
|
|
try:
|
|
return S_ISDIR(self.stat(follow_symlinks=follow_symlinks).st_mode)
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
# Path doesn't exist or is a broken symlink
|
|
# (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
|
|
return False
|
|
except ValueError:
|
|
# Non-encodable path
|
|
return False
|
|
|
|
def is_file(self, *, follow_symlinks=True):
|
|
"""
|
|
Whether this path is a regular file (also True for symlinks pointing
|
|
to regular files).
|
|
"""
|
|
try:
|
|
return S_ISREG(self.stat(follow_symlinks=follow_symlinks).st_mode)
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
# Path doesn't exist or is a broken symlink
|
|
# (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
|
|
return False
|
|
except ValueError:
|
|
# Non-encodable path
|
|
return False
|
|
|
|
def is_mount(self):
|
|
"""
|
|
Check if this path is a mount point
|
|
"""
|
|
# Need to exist and be a dir
|
|
if not self.exists() or not self.is_dir():
|
|
return False
|
|
|
|
try:
|
|
parent_dev = self.parent.stat().st_dev
|
|
except OSError:
|
|
return False
|
|
|
|
dev = self.stat().st_dev
|
|
if dev != parent_dev:
|
|
return True
|
|
ino = self.stat().st_ino
|
|
parent_ino = self.parent.stat().st_ino
|
|
return ino == parent_ino
|
|
|
|
def is_symlink(self):
|
|
"""
|
|
Whether this path is a symbolic link.
|
|
"""
|
|
try:
|
|
return S_ISLNK(self.lstat().st_mode)
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
# Path doesn't exist
|
|
return False
|
|
except ValueError:
|
|
# Non-encodable path
|
|
return False
|
|
|
|
def is_junction(self):
|
|
"""
|
|
Whether this path is a junction.
|
|
"""
|
|
# Junctions are a Windows-only feature, not present in POSIX nor the
|
|
# majority of virtual filesystems. There is no cross-platform idiom
|
|
# to check for junctions (using stat().st_mode).
|
|
return False
|
|
|
|
def is_block_device(self):
|
|
"""
|
|
Whether this path is a block device.
|
|
"""
|
|
try:
|
|
return S_ISBLK(self.stat().st_mode)
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
# Path doesn't exist or is a broken symlink
|
|
# (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
|
|
return False
|
|
except ValueError:
|
|
# Non-encodable path
|
|
return False
|
|
|
|
def is_char_device(self):
|
|
"""
|
|
Whether this path is a character device.
|
|
"""
|
|
try:
|
|
return S_ISCHR(self.stat().st_mode)
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
# Path doesn't exist or is a broken symlink
|
|
# (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
|
|
return False
|
|
except ValueError:
|
|
# Non-encodable path
|
|
return False
|
|
|
|
def is_fifo(self):
|
|
"""
|
|
Whether this path is a FIFO.
|
|
"""
|
|
try:
|
|
return S_ISFIFO(self.stat().st_mode)
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
# Path doesn't exist or is a broken symlink
|
|
# (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
|
|
return False
|
|
except ValueError:
|
|
# Non-encodable path
|
|
return False
|
|
|
|
def is_socket(self):
|
|
"""
|
|
Whether this path is a socket.
|
|
"""
|
|
try:
|
|
return S_ISSOCK(self.stat().st_mode)
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
# Path doesn't exist or is a broken symlink
|
|
# (see http://web.archive.org/web/20200623061726/https://bitbucket.org/pitrou/pathlib/issues/12/ )
|
|
return False
|
|
except ValueError:
|
|
# Non-encodable path
|
|
return False
|
|
|
|
def samefile(self, other_path):
|
|
"""Return whether other_path is the same or not as this file
|
|
(as returned by os.path.samefile()).
|
|
"""
|
|
st = self.stat()
|
|
try:
|
|
other_st = other_path.stat()
|
|
except AttributeError:
|
|
other_st = self.with_segments(other_path).stat()
|
|
return (st.st_ino == other_st.st_ino and
|
|
st.st_dev == other_st.st_dev)
|
|
|
|
def open(self, mode='r', buffering=-1, encoding=None,
|
|
errors=None, newline=None):
|
|
"""
|
|
Open the file pointed by this path and return a file object, as
|
|
the built-in open() function does.
|
|
"""
|
|
self._unsupported("open")
|
|
|
|
def read_bytes(self):
|
|
"""
|
|
Open the file in bytes mode, read it, and close the file.
|
|
"""
|
|
with self.open(mode='rb') as f:
|
|
return f.read()
|
|
|
|
def read_text(self, encoding=None, errors=None, newline=None):
|
|
"""
|
|
Open the file in text mode, read it, and close the file.
|
|
"""
|
|
with self.open(mode='r', encoding=encoding, errors=errors, newline=newline) as f:
|
|
return f.read()
|
|
|
|
def write_bytes(self, data):
|
|
"""
|
|
Open the file in bytes mode, write to it, and close the file.
|
|
"""
|
|
# type-check for the buffer interface before truncating the file
|
|
view = memoryview(data)
|
|
with self.open(mode='wb') as f:
|
|
return f.write(view)
|
|
|
|
def write_text(self, data, encoding=None, errors=None, newline=None):
|
|
"""
|
|
Open the file in text mode, write to it, and close the file.
|
|
"""
|
|
if not isinstance(data, str):
|
|
raise TypeError('data must be str, not %s' %
|
|
data.__class__.__name__)
|
|
with self.open(mode='w', encoding=encoding, errors=errors, newline=newline) as f:
|
|
return f.write(data)
|
|
|
|
def iterdir(self):
|
|
"""Yield path objects of the directory contents.
|
|
|
|
The children are yielded in arbitrary order, and the
|
|
special entries '.' and '..' are not included.
|
|
"""
|
|
self._unsupported("iterdir")
|
|
|
|
def _scandir(self):
|
|
# Emulate os.scandir(), which returns an object that can be used as a
|
|
# context manager. This method is called by walk() and glob().
|
|
from contextlib import nullcontext
|
|
return nullcontext(self.iterdir())
|
|
|
|
def _make_child_entry(self, entry):
|
|
# Transform an entry yielded from _scandir() into a path object.
|
|
return entry
|
|
|
|
def _make_child_relpath(self, name):
|
|
return self.joinpath(name)
|
|
|
|
def glob(self, pattern, *, case_sensitive=None, follow_symlinks=None):
|
|
"""Iterate over this subtree and yield all existing files (of any
|
|
kind, including directories) matching the given relative pattern.
|
|
"""
|
|
if not isinstance(pattern, PurePathBase):
|
|
pattern = self.with_segments(pattern)
|
|
if case_sensitive is None:
|
|
# TODO: evaluate case-sensitivity of each directory in _select_children().
|
|
case_sensitive = _is_case_sensitive(self.pathmod)
|
|
|
|
stack = pattern._pattern_stack
|
|
specials = ('', '.', '..')
|
|
filter_paths = False
|
|
deduplicate_paths = False
|
|
sep = self.pathmod.sep
|
|
paths = iter([self] if self.is_dir() else [])
|
|
while stack:
|
|
part = stack.pop()
|
|
if part in specials:
|
|
paths = _select_special(paths, part)
|
|
elif part == '**':
|
|
# Consume adjacent '**' components.
|
|
while stack and stack[-1] == '**':
|
|
stack.pop()
|
|
|
|
# Consume adjacent non-special components and enable post-walk
|
|
# regex filtering, provided we're treating symlinks consistently.
|
|
if follow_symlinks is not None:
|
|
while stack and stack[-1] not in specials:
|
|
filter_paths = True
|
|
stack.pop()
|
|
|
|
dir_only = bool(stack)
|
|
paths = _select_recursive(paths, dir_only, follow_symlinks)
|
|
if deduplicate_paths:
|
|
# De-duplicate if we've already seen a '**' component.
|
|
paths = _select_unique(paths)
|
|
deduplicate_paths = True
|
|
elif '**' in part:
|
|
raise ValueError("Invalid pattern: '**' can only be an entire path component")
|
|
else:
|
|
dir_only = bool(stack)
|
|
match = _compile_pattern(part, sep, case_sensitive)
|
|
paths = _select_children(paths, dir_only, follow_symlinks, match)
|
|
if filter_paths:
|
|
# Filter out paths that don't match pattern.
|
|
prefix_len = len(str(self._make_child_relpath('_'))) - 1
|
|
match = _compile_pattern(pattern._pattern_str, sep, case_sensitive)
|
|
paths = (path for path in paths if match(path._pattern_str, prefix_len))
|
|
return paths
|
|
|
|
def rglob(self, pattern, *, case_sensitive=None, follow_symlinks=None):
|
|
"""Recursively yield all existing files (of any kind, including
|
|
directories) matching the given relative pattern, anywhere in
|
|
this subtree.
|
|
"""
|
|
if not isinstance(pattern, PurePathBase):
|
|
pattern = self.with_segments(pattern)
|
|
pattern = '**' / pattern
|
|
return self.glob(pattern, case_sensitive=case_sensitive, follow_symlinks=follow_symlinks)
|
|
|
|
def walk(self, top_down=True, on_error=None, follow_symlinks=False):
|
|
"""Walk the directory tree from this directory, similar to os.walk()."""
|
|
paths = [self]
|
|
|
|
while paths:
|
|
path = paths.pop()
|
|
if isinstance(path, tuple):
|
|
yield path
|
|
continue
|
|
|
|
# We may not have read permission for self, in which case we can't
|
|
# get a list of the files the directory contains. os.walk()
|
|
# always suppressed the exception in that instance, rather than
|
|
# blow up for a minor reason when (say) a thousand readable
|
|
# directories are still left to visit. That logic is copied here.
|
|
try:
|
|
scandir_obj = path._scandir()
|
|
except OSError as error:
|
|
if on_error is not None:
|
|
on_error(error)
|
|
continue
|
|
|
|
with scandir_obj as scandir_it:
|
|
dirnames = []
|
|
filenames = []
|
|
if not top_down:
|
|
paths.append((path, dirnames, filenames))
|
|
for entry in scandir_it:
|
|
try:
|
|
is_dir = entry.is_dir(follow_symlinks=follow_symlinks)
|
|
except OSError:
|
|
# Carried over from os.path.isdir().
|
|
is_dir = False
|
|
|
|
if is_dir:
|
|
if not top_down:
|
|
paths.append(path._make_child_entry(entry))
|
|
dirnames.append(entry.name)
|
|
else:
|
|
filenames.append(entry.name)
|
|
|
|
if top_down:
|
|
yield path, dirnames, filenames
|
|
paths += [path._make_child_relpath(d) for d in reversed(dirnames)]
|
|
|
|
def absolute(self):
|
|
"""Return an absolute version of this path
|
|
No normalization or symlink resolution is performed.
|
|
|
|
Use resolve() to resolve symlinks and remove '..' segments.
|
|
"""
|
|
self._unsupported("absolute")
|
|
|
|
@classmethod
|
|
def cwd(cls):
|
|
"""Return a new path pointing to the current working directory."""
|
|
# We call 'absolute()' rather than using 'os.getcwd()' directly to
|
|
# enable users to replace the implementation of 'absolute()' in a
|
|
# subclass and benefit from the new behaviour here. This works because
|
|
# os.path.abspath('.') == os.getcwd().
|
|
return cls('').absolute()
|
|
|
|
def expanduser(self):
|
|
""" Return a new path with expanded ~ and ~user constructs
|
|
(as returned by os.path.expanduser)
|
|
"""
|
|
self._unsupported("expanduser")
|
|
|
|
@classmethod
|
|
def home(cls):
|
|
"""Return a new path pointing to expanduser('~').
|
|
"""
|
|
return cls("~").expanduser()
|
|
|
|
def readlink(self):
|
|
"""
|
|
Return the path to which the symbolic link points.
|
|
"""
|
|
self._unsupported("readlink")
|
|
readlink._supported = False
|
|
|
|
def resolve(self, strict=False):
|
|
"""
|
|
Make the path absolute, resolving all symlinks on the way and also
|
|
normalizing it.
|
|
"""
|
|
if self._resolving:
|
|
return self
|
|
path_root, parts = self._stack
|
|
path = self.with_segments(path_root)
|
|
try:
|
|
path = path.absolute()
|
|
except UnsupportedOperation:
|
|
path_tail = []
|
|
else:
|
|
path_root, path_tail = path._stack
|
|
path_tail.reverse()
|
|
|
|
# If the user has *not* overridden the `readlink()` method, then symlinks are unsupported
|
|
# and (in non-strict mode) we can improve performance by not calling `stat()`.
|
|
querying = strict or getattr(self.readlink, '_supported', True)
|
|
link_count = 0
|
|
while parts:
|
|
part = parts.pop()
|
|
if not part or part == '.':
|
|
continue
|
|
if part == '..':
|
|
if not path_tail:
|
|
if path_root:
|
|
# Delete '..' segment immediately following root
|
|
continue
|
|
elif path_tail[-1] != '..':
|
|
# Delete '..' segment and its predecessor
|
|
path_tail.pop()
|
|
continue
|
|
path_tail.append(part)
|
|
if querying and part != '..':
|
|
path = self.with_segments(path_root + self.pathmod.sep.join(path_tail))
|
|
path._resolving = True
|
|
try:
|
|
st = path.stat(follow_symlinks=False)
|
|
if S_ISLNK(st.st_mode):
|
|
# Like Linux and macOS, raise OSError(errno.ELOOP) if too many symlinks are
|
|
# encountered during resolution.
|
|
link_count += 1
|
|
if link_count >= self._max_symlinks:
|
|
raise OSError(ELOOP, "Too many symbolic links in path", self._raw_path)
|
|
target_root, target_parts = path.readlink()._stack
|
|
# If the symlink target is absolute (like '/etc/hosts'), set the current
|
|
# path to its uppermost parent (like '/').
|
|
if target_root:
|
|
path_root = target_root
|
|
path_tail.clear()
|
|
else:
|
|
path_tail.pop()
|
|
# Add the symlink target's reversed tail parts (like ['hosts', 'etc']) to
|
|
# the stack of unresolved path parts.
|
|
parts.extend(target_parts)
|
|
continue
|
|
elif parts and not S_ISDIR(st.st_mode):
|
|
raise NotADirectoryError(ENOTDIR, "Not a directory", self._raw_path)
|
|
except OSError:
|
|
if strict:
|
|
raise
|
|
else:
|
|
querying = False
|
|
return self.with_segments(path_root + self.pathmod.sep.join(path_tail))
|
|
|
|
def symlink_to(self, target, target_is_directory=False):
|
|
"""
|
|
Make this path a symlink pointing to the target path.
|
|
Note the order of arguments (link, target) is the reverse of os.symlink.
|
|
"""
|
|
self._unsupported("symlink_to")
|
|
|
|
def hardlink_to(self, target):
|
|
"""
|
|
Make this path a hard link pointing to the same file as *target*.
|
|
|
|
Note the order of arguments (self, target) is the reverse of os.link's.
|
|
"""
|
|
self._unsupported("hardlink_to")
|
|
|
|
def touch(self, mode=0o666, exist_ok=True):
|
|
"""
|
|
Create this file with the given access mode, if it doesn't exist.
|
|
"""
|
|
self._unsupported("touch")
|
|
|
|
def mkdir(self, mode=0o777, parents=False, exist_ok=False):
|
|
"""
|
|
Create a new directory at this given path.
|
|
"""
|
|
self._unsupported("mkdir")
|
|
|
|
def rename(self, target):
|
|
"""
|
|
Rename this path to the target path.
|
|
|
|
The target path may be absolute or relative. Relative paths are
|
|
interpreted relative to the current working directory, *not* the
|
|
directory of the Path object.
|
|
|
|
Returns the new Path instance pointing to the target path.
|
|
"""
|
|
self._unsupported("rename")
|
|
|
|
def replace(self, target):
|
|
"""
|
|
Rename this path to the target path, overwriting if that path exists.
|
|
|
|
The target path may be absolute or relative. Relative paths are
|
|
interpreted relative to the current working directory, *not* the
|
|
directory of the Path object.
|
|
|
|
Returns the new Path instance pointing to the target path.
|
|
"""
|
|
self._unsupported("replace")
|
|
|
|
def chmod(self, mode, *, follow_symlinks=True):
|
|
"""
|
|
Change the permissions of the path, like os.chmod().
|
|
"""
|
|
self._unsupported("chmod")
|
|
|
|
def lchmod(self, mode):
|
|
"""
|
|
Like chmod(), except if the path points to a symlink, the symlink's
|
|
permissions are changed, rather than its target's.
|
|
"""
|
|
self.chmod(mode, follow_symlinks=False)
|
|
|
|
def unlink(self, missing_ok=False):
|
|
"""
|
|
Remove this file or link.
|
|
If the path is a directory, use rmdir() instead.
|
|
"""
|
|
self._unsupported("unlink")
|
|
|
|
def rmdir(self):
|
|
"""
|
|
Remove this directory. The directory must be empty.
|
|
"""
|
|
self._unsupported("rmdir")
|
|
|
|
def owner(self, *, follow_symlinks=True):
|
|
"""
|
|
Return the login name of the file owner.
|
|
"""
|
|
self._unsupported("owner")
|
|
|
|
def group(self, *, follow_symlinks=True):
|
|
"""
|
|
Return the group name of the file gid.
|
|
"""
|
|
self._unsupported("group")
|
|
|
|
@classmethod
|
|
def from_uri(cls, uri):
|
|
"""Return a new path from the given 'file' URI."""
|
|
cls._unsupported("from_uri")
|
|
|
|
def as_uri(self):
|
|
"""Return the path as a URI."""
|
|
self._unsupported("as_uri")
|