1491 lines
48 KiB
Python
1491 lines
48 KiB
Python
import fnmatch
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import functools
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import io
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import ntpath
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import os
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import posixpath
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import re
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import sys
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from _collections_abc import Sequence
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from errno import EINVAL, ENOENT, ENOTDIR, EBADF
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from operator import attrgetter
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from stat import S_ISDIR, S_ISLNK, S_ISREG, S_ISSOCK, S_ISBLK, S_ISCHR, S_ISFIFO
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from urllib.parse import quote_from_bytes as urlquote_from_bytes
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supports_symlinks = True
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if os.name == 'nt':
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import nt
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if sys.getwindowsversion()[:2] >= (6, 0):
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from nt import _getfinalpathname
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else:
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supports_symlinks = False
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_getfinalpathname = None
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else:
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nt = None
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__all__ = [
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"PurePath", "PurePosixPath", "PureWindowsPath",
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"Path", "PosixPath", "WindowsPath",
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]
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#
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# Internals
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#
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# EBADF - guard agains macOS `stat` throwing EBADF
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_IGNORED_ERROS = (ENOENT, ENOTDIR, EBADF)
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_IGNORED_WINERRORS = (
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21, # ERROR_NOT_READY - drive exists but is not accessible
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)
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def _ignore_error(exception):
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return (getattr(exception, 'errno', None) in _IGNORED_ERROS or
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getattr(exception, 'winerror', None) in _IGNORED_WINERRORS)
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def _is_wildcard_pattern(pat):
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# Whether this pattern needs actual matching using fnmatch, or can
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# be looked up directly as a file.
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return "*" in pat or "?" in pat or "[" in pat
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class _Flavour(object):
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"""A flavour implements a particular (platform-specific) set of path
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semantics."""
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def __init__(self):
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self.join = self.sep.join
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def parse_parts(self, parts):
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parsed = []
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sep = self.sep
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altsep = self.altsep
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drv = root = ''
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it = reversed(parts)
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for part in it:
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if not part:
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continue
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if altsep:
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part = part.replace(altsep, sep)
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drv, root, rel = self.splitroot(part)
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if sep in rel:
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for x in reversed(rel.split(sep)):
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if x and x != '.':
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parsed.append(sys.intern(x))
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else:
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if rel and rel != '.':
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parsed.append(sys.intern(rel))
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if drv or root:
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if not drv:
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# If no drive is present, try to find one in the previous
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# parts. This makes the result of parsing e.g.
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# ("C:", "/", "a") reasonably intuitive.
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for part in it:
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if not part:
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continue
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if altsep:
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part = part.replace(altsep, sep)
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drv = self.splitroot(part)[0]
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if drv:
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break
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break
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if drv or root:
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parsed.append(drv + root)
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parsed.reverse()
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return drv, root, parsed
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def join_parsed_parts(self, drv, root, parts, drv2, root2, parts2):
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"""
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Join the two paths represented by the respective
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(drive, root, parts) tuples. Return a new (drive, root, parts) tuple.
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"""
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if root2:
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if not drv2 and drv:
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return drv, root2, [drv + root2] + parts2[1:]
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elif drv2:
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if drv2 == drv or self.casefold(drv2) == self.casefold(drv):
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# Same drive => second path is relative to the first
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return drv, root, parts + parts2[1:]
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else:
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# Second path is non-anchored (common case)
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return drv, root, parts + parts2
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return drv2, root2, parts2
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class _WindowsFlavour(_Flavour):
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# Reference for Windows paths can be found at
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# http://msdn.microsoft.com/en-us/library/aa365247%28v=vs.85%29.aspx
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sep = '\\'
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altsep = '/'
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has_drv = True
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pathmod = ntpath
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is_supported = (os.name == 'nt')
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drive_letters = set('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ')
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ext_namespace_prefix = '\\\\?\\'
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reserved_names = (
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{'CON', 'PRN', 'AUX', 'NUL'} |
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{'COM%d' % i for i in range(1, 10)} |
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{'LPT%d' % i for i in range(1, 10)}
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)
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# Interesting findings about extended paths:
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# - '\\?\c:\a', '//?/c:\a' and '//?/c:/a' are all supported
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# but '\\?\c:/a' is not
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# - extended paths are always absolute; "relative" extended paths will
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# fail.
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def splitroot(self, part, sep=sep):
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first = part[0:1]
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second = part[1:2]
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if (second == sep and first == sep):
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# XXX extended paths should also disable the collapsing of "."
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# components (according to MSDN docs).
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prefix, part = self._split_extended_path(part)
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first = part[0:1]
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second = part[1:2]
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else:
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prefix = ''
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third = part[2:3]
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if (second == sep and first == sep and third != sep):
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# is a UNC path:
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# vvvvvvvvvvvvvvvvvvvvv root
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# \\machine\mountpoint\directory\etc\...
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# directory ^^^^^^^^^^^^^^
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index = part.find(sep, 2)
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if index != -1:
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index2 = part.find(sep, index + 1)
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# a UNC path can't have two slashes in a row
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# (after the initial two)
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if index2 != index + 1:
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if index2 == -1:
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index2 = len(part)
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if prefix:
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return prefix + part[1:index2], sep, part[index2+1:]
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else:
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return part[:index2], sep, part[index2+1:]
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drv = root = ''
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if second == ':' and first in self.drive_letters:
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drv = part[:2]
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part = part[2:]
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first = third
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if first == sep:
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root = first
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part = part.lstrip(sep)
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return prefix + drv, root, part
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def casefold(self, s):
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return s.lower()
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def casefold_parts(self, parts):
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return [p.lower() for p in parts]
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def resolve(self, path, strict=False):
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s = str(path)
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if not s:
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return os.getcwd()
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previous_s = None
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if _getfinalpathname is not None:
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if strict:
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return self._ext_to_normal(_getfinalpathname(s))
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else:
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tail_parts = [] # End of the path after the first one not found
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while True:
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try:
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s = self._ext_to_normal(_getfinalpathname(s))
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except FileNotFoundError:
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previous_s = s
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s, tail = os.path.split(s)
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tail_parts.append(tail)
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if previous_s == s:
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return path
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else:
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return os.path.join(s, *reversed(tail_parts))
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# Means fallback on absolute
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return None
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def _split_extended_path(self, s, ext_prefix=ext_namespace_prefix):
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prefix = ''
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if s.startswith(ext_prefix):
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prefix = s[:4]
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s = s[4:]
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if s.startswith('UNC\\'):
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prefix += s[:3]
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s = '\\' + s[3:]
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return prefix, s
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def _ext_to_normal(self, s):
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# Turn back an extended path into a normal DOS-like path
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return self._split_extended_path(s)[1]
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def is_reserved(self, parts):
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# NOTE: the rules for reserved names seem somewhat complicated
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# (e.g. r"..\NUL" is reserved but not r"foo\NUL").
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# We err on the side of caution and return True for paths which are
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# not considered reserved by Windows.
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if not parts:
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return False
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if parts[0].startswith('\\\\'):
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# UNC paths are never reserved
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return False
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return parts[-1].partition('.')[0].upper() in self.reserved_names
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def make_uri(self, path):
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# Under Windows, file URIs use the UTF-8 encoding.
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drive = path.drive
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if len(drive) == 2 and drive[1] == ':':
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# It's a path on a local drive => 'file:///c:/a/b'
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rest = path.as_posix()[2:].lstrip('/')
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return 'file:///%s/%s' % (
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drive, urlquote_from_bytes(rest.encode('utf-8')))
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else:
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# It's a path on a network drive => 'file://host/share/a/b'
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return 'file:' + urlquote_from_bytes(path.as_posix().encode('utf-8'))
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def gethomedir(self, username):
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if 'HOME' in os.environ:
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userhome = os.environ['HOME']
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elif 'USERPROFILE' in os.environ:
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userhome = os.environ['USERPROFILE']
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elif 'HOMEPATH' in os.environ:
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try:
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drv = os.environ['HOMEDRIVE']
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except KeyError:
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drv = ''
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userhome = drv + os.environ['HOMEPATH']
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else:
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raise RuntimeError("Can't determine home directory")
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if username:
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# Try to guess user home directory. By default all users
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# directories are located in the same place and are named by
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# corresponding usernames. If current user home directory points
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# to nonstandard place, this guess is likely wrong.
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if os.environ['USERNAME'] != username:
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drv, root, parts = self.parse_parts((userhome,))
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if parts[-1] != os.environ['USERNAME']:
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raise RuntimeError("Can't determine home directory "
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"for %r" % username)
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parts[-1] = username
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if drv or root:
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userhome = drv + root + self.join(parts[1:])
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else:
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userhome = self.join(parts)
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return userhome
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class _PosixFlavour(_Flavour):
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sep = '/'
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altsep = ''
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has_drv = False
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pathmod = posixpath
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is_supported = (os.name != 'nt')
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def splitroot(self, part, sep=sep):
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if part and part[0] == sep:
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stripped_part = part.lstrip(sep)
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# According to POSIX path resolution:
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# http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap04.html#tag_04_11
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# "A pathname that begins with two successive slashes may be
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# interpreted in an implementation-defined manner, although more
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# than two leading slashes shall be treated as a single slash".
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if len(part) - len(stripped_part) == 2:
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return '', sep * 2, stripped_part
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else:
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return '', sep, stripped_part
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else:
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return '', '', part
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def casefold(self, s):
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return s
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def casefold_parts(self, parts):
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return parts
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def resolve(self, path, strict=False):
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sep = self.sep
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accessor = path._accessor
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seen = {}
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def _resolve(path, rest):
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if rest.startswith(sep):
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path = ''
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for name in rest.split(sep):
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if not name or name == '.':
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# current dir
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continue
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if name == '..':
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# parent dir
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path, _, _ = path.rpartition(sep)
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continue
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newpath = path + sep + name
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if newpath in seen:
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# Already seen this path
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path = seen[newpath]
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if path is not None:
|
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# use cached value
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continue
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# The symlink is not resolved, so we must have a symlink loop.
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raise RuntimeError("Symlink loop from %r" % newpath)
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# Resolve the symbolic link
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try:
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target = accessor.readlink(newpath)
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except OSError as e:
|
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if e.errno != EINVAL and strict:
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raise
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# Not a symlink, or non-strict mode. We just leave the path
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# untouched.
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path = newpath
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else:
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seen[newpath] = None # not resolved symlink
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path = _resolve(path, target)
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seen[newpath] = path # resolved symlink
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return path
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# NOTE: according to POSIX, getcwd() cannot contain path components
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# which are symlinks.
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base = '' if path.is_absolute() else os.getcwd()
|
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return _resolve(base, str(path)) or sep
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|
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def is_reserved(self, parts):
|
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return False
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def make_uri(self, path):
|
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# We represent the path using the local filesystem encoding,
|
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# for portability to other applications.
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bpath = bytes(path)
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return 'file://' + urlquote_from_bytes(bpath)
|
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|
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def gethomedir(self, username):
|
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if not username:
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try:
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return os.environ['HOME']
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except KeyError:
|
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import pwd
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return pwd.getpwuid(os.getuid()).pw_dir
|
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else:
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import pwd
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try:
|
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return pwd.getpwnam(username).pw_dir
|
|
except KeyError:
|
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raise RuntimeError("Can't determine home directory "
|
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"for %r" % username)
|
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|
|
|
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_windows_flavour = _WindowsFlavour()
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_posix_flavour = _PosixFlavour()
|
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|
|
|
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class _Accessor:
|
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"""An accessor implements a particular (system-specific or not) way of
|
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accessing paths on the filesystem."""
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|
|
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class _NormalAccessor(_Accessor):
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stat = os.stat
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lstat = os.lstat
|
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open = os.open
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listdir = os.listdir
|
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scandir = os.scandir
|
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|
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chmod = os.chmod
|
|
|
|
if hasattr(os, "lchmod"):
|
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lchmod = os.lchmod
|
|
else:
|
|
def lchmod(self, pathobj, mode):
|
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raise NotImplementedError("lchmod() not available on this system")
|
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|
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mkdir = os.mkdir
|
|
|
|
unlink = os.unlink
|
|
|
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rmdir = os.rmdir
|
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|
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rename = os.rename
|
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|
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replace = os.replace
|
|
|
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if nt:
|
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if supports_symlinks:
|
|
symlink = os.symlink
|
|
else:
|
|
def symlink(a, b, target_is_directory):
|
|
raise NotImplementedError("symlink() not available on this system")
|
|
else:
|
|
# Under POSIX, os.symlink() takes two args
|
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@staticmethod
|
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def symlink(a, b, target_is_directory):
|
|
return os.symlink(a, b)
|
|
|
|
utime = os.utime
|
|
|
|
# Helper for resolve()
|
|
def readlink(self, path):
|
|
return os.readlink(path)
|
|
|
|
|
|
_normal_accessor = _NormalAccessor()
|
|
|
|
|
|
#
|
|
# Globbing helpers
|
|
#
|
|
|
|
def _make_selector(pattern_parts):
|
|
pat = pattern_parts[0]
|
|
child_parts = pattern_parts[1:]
|
|
if pat == '**':
|
|
cls = _RecursiveWildcardSelector
|
|
elif '**' in pat:
|
|
raise ValueError("Invalid pattern: '**' can only be an entire path component")
|
|
elif _is_wildcard_pattern(pat):
|
|
cls = _WildcardSelector
|
|
else:
|
|
cls = _PreciseSelector
|
|
return cls(pat, child_parts)
|
|
|
|
if hasattr(functools, "lru_cache"):
|
|
_make_selector = functools.lru_cache()(_make_selector)
|
|
|
|
|
|
class _Selector:
|
|
"""A selector matches a specific glob pattern part against the children
|
|
of a given path."""
|
|
|
|
def __init__(self, child_parts):
|
|
self.child_parts = child_parts
|
|
if child_parts:
|
|
self.successor = _make_selector(child_parts)
|
|
self.dironly = True
|
|
else:
|
|
self.successor = _TerminatingSelector()
|
|
self.dironly = False
|
|
|
|
def select_from(self, parent_path):
|
|
"""Iterate over all child paths of `parent_path` matched by this
|
|
selector. This can contain parent_path itself."""
|
|
path_cls = type(parent_path)
|
|
is_dir = path_cls.is_dir
|
|
exists = path_cls.exists
|
|
scandir = parent_path._accessor.scandir
|
|
if not is_dir(parent_path):
|
|
return iter([])
|
|
return self._select_from(parent_path, is_dir, exists, scandir)
|
|
|
|
|
|
class _TerminatingSelector:
|
|
|
|
def _select_from(self, parent_path, is_dir, exists, scandir):
|
|
yield parent_path
|
|
|
|
|
|
class _PreciseSelector(_Selector):
|
|
|
|
def __init__(self, name, child_parts):
|
|
self.name = name
|
|
_Selector.__init__(self, child_parts)
|
|
|
|
def _select_from(self, parent_path, is_dir, exists, scandir):
|
|
try:
|
|
path = parent_path._make_child_relpath(self.name)
|
|
if (is_dir if self.dironly else exists)(path):
|
|
for p in self.successor._select_from(path, is_dir, exists, scandir):
|
|
yield p
|
|
except PermissionError:
|
|
return
|
|
|
|
|
|
class _WildcardSelector(_Selector):
|
|
|
|
def __init__(self, pat, child_parts):
|
|
self.pat = re.compile(fnmatch.translate(pat))
|
|
_Selector.__init__(self, child_parts)
|
|
|
|
def _select_from(self, parent_path, is_dir, exists, scandir):
|
|
try:
|
|
cf = parent_path._flavour.casefold
|
|
entries = list(scandir(parent_path))
|
|
for entry in entries:
|
|
if not self.dironly or entry.is_dir():
|
|
name = entry.name
|
|
casefolded = cf(name)
|
|
if self.pat.match(casefolded):
|
|
path = parent_path._make_child_relpath(name)
|
|
for p in self.successor._select_from(path, is_dir, exists, scandir):
|
|
yield p
|
|
except PermissionError:
|
|
return
|
|
|
|
|
|
|
|
class _RecursiveWildcardSelector(_Selector):
|
|
|
|
def __init__(self, pat, child_parts):
|
|
_Selector.__init__(self, child_parts)
|
|
|
|
def _iterate_directories(self, parent_path, is_dir, scandir):
|
|
yield parent_path
|
|
try:
|
|
entries = list(scandir(parent_path))
|
|
for entry in entries:
|
|
entry_is_dir = False
|
|
try:
|
|
entry_is_dir = entry.is_dir()
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
if entry_is_dir and not entry.is_symlink():
|
|
path = parent_path._make_child_relpath(entry.name)
|
|
for p in self._iterate_directories(path, is_dir, scandir):
|
|
yield p
|
|
except PermissionError:
|
|
return
|
|
|
|
def _select_from(self, parent_path, is_dir, exists, scandir):
|
|
try:
|
|
yielded = set()
|
|
try:
|
|
successor_select = self.successor._select_from
|
|
for starting_point in self._iterate_directories(parent_path, is_dir, scandir):
|
|
for p in successor_select(starting_point, is_dir, exists, scandir):
|
|
if p not in yielded:
|
|
yield p
|
|
yielded.add(p)
|
|
finally:
|
|
yielded.clear()
|
|
except PermissionError:
|
|
return
|
|
|
|
|
|
#
|
|
# Public API
|
|
#
|
|
|
|
class _PathParents(Sequence):
|
|
"""This object provides sequence-like access to the logical ancestors
|
|
of a path. Don't try to construct it yourself."""
|
|
__slots__ = ('_pathcls', '_drv', '_root', '_parts')
|
|
|
|
def __init__(self, path):
|
|
# We don't store the instance to avoid reference cycles
|
|
self._pathcls = type(path)
|
|
self._drv = path._drv
|
|
self._root = path._root
|
|
self._parts = path._parts
|
|
|
|
def __len__(self):
|
|
if self._drv or self._root:
|
|
return len(self._parts) - 1
|
|
else:
|
|
return len(self._parts)
|
|
|
|
def __getitem__(self, idx):
|
|
if idx < 0 or idx >= len(self):
|
|
raise IndexError(idx)
|
|
return self._pathcls._from_parsed_parts(self._drv, self._root,
|
|
self._parts[:-idx - 1])
|
|
|
|
def __repr__(self):
|
|
return "<{}.parents>".format(self._pathcls.__name__)
|
|
|
|
|
|
class PurePath(object):
|
|
"""Base class for manipulating paths without I/O.
|
|
|
|
PurePath represents a filesystem path and offers operations which
|
|
don't imply any actual filesystem I/O. Depending on your system,
|
|
instantiating a PurePath will return either a PurePosixPath or a
|
|
PureWindowsPath object. You can also instantiate either of these classes
|
|
directly, regardless of your system.
|
|
"""
|
|
__slots__ = (
|
|
'_drv', '_root', '_parts',
|
|
'_str', '_hash', '_pparts', '_cached_cparts',
|
|
)
|
|
|
|
def __new__(cls, *args):
|
|
"""Construct a PurePath from one or several strings and or existing
|
|
PurePath objects. The strings and path objects are combined so as
|
|
to yield a canonicalized path, which is incorporated into the
|
|
new PurePath object.
|
|
"""
|
|
if cls is PurePath:
|
|
cls = PureWindowsPath if os.name == 'nt' else PurePosixPath
|
|
return cls._from_parts(args)
|
|
|
|
def __reduce__(self):
|
|
# Using the parts tuple helps share interned path parts
|
|
# when pickling related paths.
|
|
return (self.__class__, tuple(self._parts))
|
|
|
|
@classmethod
|
|
def _parse_args(cls, args):
|
|
# This is useful when you don't want to create an instance, just
|
|
# canonicalize some constructor arguments.
|
|
parts = []
|
|
for a in args:
|
|
if isinstance(a, PurePath):
|
|
parts += a._parts
|
|
else:
|
|
a = os.fspath(a)
|
|
if isinstance(a, str):
|
|
# Force-cast str subclasses to str (issue #21127)
|
|
parts.append(str(a))
|
|
else:
|
|
raise TypeError(
|
|
"argument should be a str object or an os.PathLike "
|
|
"object returning str, not %r"
|
|
% type(a))
|
|
return cls._flavour.parse_parts(parts)
|
|
|
|
@classmethod
|
|
def _from_parts(cls, args, init=True):
|
|
# We need to call _parse_args on the instance, so as to get the
|
|
# right flavour.
|
|
self = object.__new__(cls)
|
|
drv, root, parts = self._parse_args(args)
|
|
self._drv = drv
|
|
self._root = root
|
|
self._parts = parts
|
|
if init:
|
|
self._init()
|
|
return self
|
|
|
|
@classmethod
|
|
def _from_parsed_parts(cls, drv, root, parts, init=True):
|
|
self = object.__new__(cls)
|
|
self._drv = drv
|
|
self._root = root
|
|
self._parts = parts
|
|
if init:
|
|
self._init()
|
|
return self
|
|
|
|
@classmethod
|
|
def _format_parsed_parts(cls, drv, root, parts):
|
|
if drv or root:
|
|
return drv + root + cls._flavour.join(parts[1:])
|
|
else:
|
|
return cls._flavour.join(parts)
|
|
|
|
def _init(self):
|
|
# Overridden in concrete Path
|
|
pass
|
|
|
|
def _make_child(self, args):
|
|
drv, root, parts = self._parse_args(args)
|
|
drv, root, parts = self._flavour.join_parsed_parts(
|
|
self._drv, self._root, self._parts, drv, root, parts)
|
|
return self._from_parsed_parts(drv, root, parts)
|
|
|
|
def __str__(self):
|
|
"""Return the string representation of the path, suitable for
|
|
passing to system calls."""
|
|
try:
|
|
return self._str
|
|
except AttributeError:
|
|
self._str = self._format_parsed_parts(self._drv, self._root,
|
|
self._parts) or '.'
|
|
return self._str
|
|
|
|
def __fspath__(self):
|
|
return str(self)
|
|
|
|
def as_posix(self):
|
|
"""Return the string representation of the path with forward (/)
|
|
slashes."""
|
|
f = self._flavour
|
|
return str(self).replace(f.sep, '/')
|
|
|
|
def __bytes__(self):
|
|
"""Return the bytes representation of the path. This is only
|
|
recommended to use under Unix."""
|
|
return os.fsencode(self)
|
|
|
|
def __repr__(self):
|
|
return "{}({!r})".format(self.__class__.__name__, self.as_posix())
|
|
|
|
def as_uri(self):
|
|
"""Return the path as a 'file' URI."""
|
|
if not self.is_absolute():
|
|
raise ValueError("relative path can't be expressed as a file URI")
|
|
return self._flavour.make_uri(self)
|
|
|
|
@property
|
|
def _cparts(self):
|
|
# Cached casefolded parts, for hashing and comparison
|
|
try:
|
|
return self._cached_cparts
|
|
except AttributeError:
|
|
self._cached_cparts = self._flavour.casefold_parts(self._parts)
|
|
return self._cached_cparts
|
|
|
|
def __eq__(self, other):
|
|
if not isinstance(other, PurePath):
|
|
return NotImplemented
|
|
return self._cparts == other._cparts and self._flavour is other._flavour
|
|
|
|
def __hash__(self):
|
|
try:
|
|
return self._hash
|
|
except AttributeError:
|
|
self._hash = hash(tuple(self._cparts))
|
|
return self._hash
|
|
|
|
def __lt__(self, other):
|
|
if not isinstance(other, PurePath) or self._flavour is not other._flavour:
|
|
return NotImplemented
|
|
return self._cparts < other._cparts
|
|
|
|
def __le__(self, other):
|
|
if not isinstance(other, PurePath) or self._flavour is not other._flavour:
|
|
return NotImplemented
|
|
return self._cparts <= other._cparts
|
|
|
|
def __gt__(self, other):
|
|
if not isinstance(other, PurePath) or self._flavour is not other._flavour:
|
|
return NotImplemented
|
|
return self._cparts > other._cparts
|
|
|
|
def __ge__(self, other):
|
|
if not isinstance(other, PurePath) or self._flavour is not other._flavour:
|
|
return NotImplemented
|
|
return self._cparts >= other._cparts
|
|
|
|
drive = property(attrgetter('_drv'),
|
|
doc="""The drive prefix (letter or UNC path), if any.""")
|
|
|
|
root = property(attrgetter('_root'),
|
|
doc="""The root of the path, if any.""")
|
|
|
|
@property
|
|
def anchor(self):
|
|
"""The concatenation of the drive and root, or ''."""
|
|
anchor = self._drv + self._root
|
|
return anchor
|
|
|
|
@property
|
|
def name(self):
|
|
"""The final path component, if any."""
|
|
parts = self._parts
|
|
if len(parts) == (1 if (self._drv or self._root) else 0):
|
|
return ''
|
|
return parts[-1]
|
|
|
|
@property
|
|
def suffix(self):
|
|
"""The final component's last suffix, if any."""
|
|
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."""
|
|
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."""
|
|
if not self.name:
|
|
raise ValueError("%r has an empty name" % (self,))
|
|
drv, root, parts = self._flavour.parse_parts((name,))
|
|
if (not name or name[-1] in [self._flavour.sep, self._flavour.altsep]
|
|
or drv or root or len(parts) != 1):
|
|
raise ValueError("Invalid name %r" % (name))
|
|
return self._from_parsed_parts(self._drv, self._root,
|
|
self._parts[:-1] + [name])
|
|
|
|
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.
|
|
"""
|
|
f = self._flavour
|
|
if f.sep in suffix or f.altsep and f.altsep in suffix:
|
|
raise ValueError("Invalid suffix %r" % (suffix,))
|
|
if suffix and not suffix.startswith('.') or suffix == '.':
|
|
raise ValueError("Invalid suffix %r" % (suffix))
|
|
name = self.name
|
|
if not name:
|
|
raise ValueError("%r has an empty name" % (self,))
|
|
old_suffix = self.suffix
|
|
if not old_suffix:
|
|
name = name + suffix
|
|
else:
|
|
name = name[:-len(old_suffix)] + suffix
|
|
return self._from_parsed_parts(self._drv, self._root,
|
|
self._parts[:-1] + [name])
|
|
|
|
def relative_to(self, *other):
|
|
"""Return the relative path to another path identified by the passed
|
|
arguments. If the operation is not possible (because this is not
|
|
a subpath of the other path), raise ValueError.
|
|
"""
|
|
# For the purpose of this method, drive and root are considered
|
|
# separate parts, i.e.:
|
|
# Path('c:/').relative_to('c:') gives Path('/')
|
|
# Path('c:/').relative_to('/') raise ValueError
|
|
if not other:
|
|
raise TypeError("need at least one argument")
|
|
parts = self._parts
|
|
drv = self._drv
|
|
root = self._root
|
|
if root:
|
|
abs_parts = [drv, root] + parts[1:]
|
|
else:
|
|
abs_parts = parts
|
|
to_drv, to_root, to_parts = self._parse_args(other)
|
|
if to_root:
|
|
to_abs_parts = [to_drv, to_root] + to_parts[1:]
|
|
else:
|
|
to_abs_parts = to_parts
|
|
n = len(to_abs_parts)
|
|
cf = self._flavour.casefold_parts
|
|
if (root or drv) if n == 0 else cf(abs_parts[:n]) != cf(to_abs_parts):
|
|
formatted = self._format_parsed_parts(to_drv, to_root, to_parts)
|
|
raise ValueError("{!r} does not start with {!r}"
|
|
.format(str(self), str(formatted)))
|
|
return self._from_parsed_parts('', root if n == 1 else '',
|
|
abs_parts[n:])
|
|
|
|
@property
|
|
def parts(self):
|
|
"""An object providing sequence-like access to the
|
|
components in the filesystem path."""
|
|
# We cache the tuple to avoid building a new one each time .parts
|
|
# is accessed. XXX is this necessary?
|
|
try:
|
|
return self._pparts
|
|
except AttributeError:
|
|
self._pparts = tuple(self._parts)
|
|
return self._pparts
|
|
|
|
def joinpath(self, *args):
|
|
"""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._make_child(args)
|
|
|
|
def __truediv__(self, key):
|
|
return self._make_child((key,))
|
|
|
|
def __rtruediv__(self, key):
|
|
return self._from_parts([key] + self._parts)
|
|
|
|
@property
|
|
def parent(self):
|
|
"""The logical parent of the path."""
|
|
drv = self._drv
|
|
root = self._root
|
|
parts = self._parts
|
|
if len(parts) == 1 and (drv or root):
|
|
return self
|
|
return self._from_parsed_parts(drv, root, parts[:-1])
|
|
|
|
@property
|
|
def parents(self):
|
|
"""A sequence of this path's logical parents."""
|
|
return _PathParents(self)
|
|
|
|
def is_absolute(self):
|
|
"""True if the path is absolute (has both a root and, if applicable,
|
|
a drive)."""
|
|
if not self._root:
|
|
return False
|
|
return not self._flavour.has_drv or bool(self._drv)
|
|
|
|
def is_reserved(self):
|
|
"""Return True if the path contains one of the special names reserved
|
|
by the system, if any."""
|
|
return self._flavour.is_reserved(self._parts)
|
|
|
|
def match(self, path_pattern):
|
|
"""
|
|
Return True if this path matches the given pattern.
|
|
"""
|
|
cf = self._flavour.casefold
|
|
path_pattern = cf(path_pattern)
|
|
drv, root, pat_parts = self._flavour.parse_parts((path_pattern,))
|
|
if not pat_parts:
|
|
raise ValueError("empty pattern")
|
|
if drv and drv != cf(self._drv):
|
|
return False
|
|
if root and root != cf(self._root):
|
|
return False
|
|
parts = self._cparts
|
|
if drv or root:
|
|
if len(pat_parts) != len(parts):
|
|
return False
|
|
pat_parts = pat_parts[1:]
|
|
elif len(pat_parts) > len(parts):
|
|
return False
|
|
for part, pat in zip(reversed(parts), reversed(pat_parts)):
|
|
if not fnmatch.fnmatchcase(part, pat):
|
|
return False
|
|
return True
|
|
|
|
# Can't subclass os.PathLike from PurePath and keep the constructor
|
|
# optimizations in PurePath._parse_args().
|
|
os.PathLike.register(PurePath)
|
|
|
|
|
|
class PurePosixPath(PurePath):
|
|
"""PurePath subclass for non-Windows systems.
|
|
|
|
On a POSIX system, instantiating a PurePath should return this object.
|
|
However, you can also instantiate it directly on any system.
|
|
"""
|
|
_flavour = _posix_flavour
|
|
__slots__ = ()
|
|
|
|
|
|
class PureWindowsPath(PurePath):
|
|
"""PurePath subclass for Windows systems.
|
|
|
|
On a Windows system, instantiating a PurePath should return this object.
|
|
However, you can also instantiate it directly on any system.
|
|
"""
|
|
_flavour = _windows_flavour
|
|
__slots__ = ()
|
|
|
|
|
|
# Filesystem-accessing classes
|
|
|
|
|
|
class Path(PurePath):
|
|
"""PurePath subclass that can make system calls.
|
|
|
|
Path represents a filesystem path but unlike PurePath, also offers
|
|
methods to do system calls on path objects. Depending on your system,
|
|
instantiating a Path will return either a PosixPath or a WindowsPath
|
|
object. You can also instantiate a PosixPath or WindowsPath directly,
|
|
but cannot instantiate a WindowsPath on a POSIX system or vice versa.
|
|
"""
|
|
__slots__ = (
|
|
'_accessor',
|
|
'_closed',
|
|
)
|
|
|
|
def __new__(cls, *args, **kwargs):
|
|
if cls is Path:
|
|
cls = WindowsPath if os.name == 'nt' else PosixPath
|
|
self = cls._from_parts(args, init=False)
|
|
if not self._flavour.is_supported:
|
|
raise NotImplementedError("cannot instantiate %r on your system"
|
|
% (cls.__name__,))
|
|
self._init()
|
|
return self
|
|
|
|
def _init(self,
|
|
# Private non-constructor arguments
|
|
template=None,
|
|
):
|
|
self._closed = False
|
|
if template is not None:
|
|
self._accessor = template._accessor
|
|
else:
|
|
self._accessor = _normal_accessor
|
|
|
|
def _make_child_relpath(self, part):
|
|
# This is an optimization used for dir walking. `part` must be
|
|
# a single part relative to this path.
|
|
parts = self._parts + [part]
|
|
return self._from_parsed_parts(self._drv, self._root, parts)
|
|
|
|
def __enter__(self):
|
|
if self._closed:
|
|
self._raise_closed()
|
|
return self
|
|
|
|
def __exit__(self, t, v, tb):
|
|
self._closed = True
|
|
|
|
def _raise_closed(self):
|
|
raise ValueError("I/O operation on closed path")
|
|
|
|
def _opener(self, name, flags, mode=0o666):
|
|
# A stub for the opener argument to built-in open()
|
|
return self._accessor.open(self, flags, mode)
|
|
|
|
def _raw_open(self, flags, mode=0o777):
|
|
"""
|
|
Open the file pointed by this path and return a file descriptor,
|
|
as os.open() does.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
return self._accessor.open(self, flags, mode)
|
|
|
|
# Public API
|
|
|
|
@classmethod
|
|
def cwd(cls):
|
|
"""Return a new path pointing to the current working directory
|
|
(as returned by os.getcwd()).
|
|
"""
|
|
return cls(os.getcwd())
|
|
|
|
@classmethod
|
|
def home(cls):
|
|
"""Return a new path pointing to the user's home directory (as
|
|
returned by os.path.expanduser('~')).
|
|
"""
|
|
return cls(cls()._flavour.gethomedir(None))
|
|
|
|
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 = os.stat(other_path)
|
|
return os.path.samestat(st, other_st)
|
|
|
|
def iterdir(self):
|
|
"""Iterate over the files in this directory. Does not yield any
|
|
result for the special paths '.' and '..'.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
for name in self._accessor.listdir(self):
|
|
if name in {'.', '..'}:
|
|
# Yielding a path object for these makes little sense
|
|
continue
|
|
yield self._make_child_relpath(name)
|
|
if self._closed:
|
|
self._raise_closed()
|
|
|
|
def glob(self, pattern):
|
|
"""Iterate over this subtree and yield all existing files (of any
|
|
kind, including directories) matching the given pattern.
|
|
"""
|
|
if not pattern:
|
|
raise ValueError("Unacceptable pattern: {!r}".format(pattern))
|
|
pattern = self._flavour.casefold(pattern)
|
|
drv, root, pattern_parts = self._flavour.parse_parts((pattern,))
|
|
if drv or root:
|
|
raise NotImplementedError("Non-relative patterns are unsupported")
|
|
selector = _make_selector(tuple(pattern_parts))
|
|
for p in selector.select_from(self):
|
|
yield p
|
|
|
|
def rglob(self, pattern):
|
|
"""Recursively yield all existing files (of any kind, including
|
|
directories) matching the given pattern, anywhere in this subtree.
|
|
"""
|
|
pattern = self._flavour.casefold(pattern)
|
|
drv, root, pattern_parts = self._flavour.parse_parts((pattern,))
|
|
if drv or root:
|
|
raise NotImplementedError("Non-relative patterns are unsupported")
|
|
selector = _make_selector(("**",) + tuple(pattern_parts))
|
|
for p in selector.select_from(self):
|
|
yield p
|
|
|
|
def absolute(self):
|
|
"""Return an absolute version of this path. This function works
|
|
even if the path doesn't point to anything.
|
|
|
|
No normalization is done, i.e. all '.' and '..' will be kept along.
|
|
Use resolve() to get the canonical path to a file.
|
|
"""
|
|
# XXX untested yet!
|
|
if self._closed:
|
|
self._raise_closed()
|
|
if self.is_absolute():
|
|
return self
|
|
# FIXME this must defer to the specific flavour (and, under Windows,
|
|
# use nt._getfullpathname())
|
|
obj = self._from_parts([os.getcwd()] + self._parts, init=False)
|
|
obj._init(template=self)
|
|
return obj
|
|
|
|
def resolve(self, strict=False):
|
|
"""
|
|
Make the path absolute, resolving all symlinks on the way and also
|
|
normalizing it (for example turning slashes into backslashes under
|
|
Windows).
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
s = self._flavour.resolve(self, strict=strict)
|
|
if s is None:
|
|
# No symlink resolution => for consistency, raise an error if
|
|
# the path doesn't exist or is forbidden
|
|
self.stat()
|
|
s = str(self.absolute())
|
|
# Now we have no symlinks in the path, it's safe to normalize it.
|
|
normed = self._flavour.pathmod.normpath(s)
|
|
obj = self._from_parts((normed,), init=False)
|
|
obj._init(template=self)
|
|
return obj
|
|
|
|
def stat(self):
|
|
"""
|
|
Return the result of the stat() system call on this path, like
|
|
os.stat() does.
|
|
"""
|
|
return self._accessor.stat(self)
|
|
|
|
def owner(self):
|
|
"""
|
|
Return the login name of the file owner.
|
|
"""
|
|
import pwd
|
|
return pwd.getpwuid(self.stat().st_uid).pw_name
|
|
|
|
def group(self):
|
|
"""
|
|
Return the group name of the file gid.
|
|
"""
|
|
import grp
|
|
return grp.getgrgid(self.stat().st_gid).gr_name
|
|
|
|
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.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
return io.open(self, mode, buffering, encoding, errors, newline,
|
|
opener=self._opener)
|
|
|
|
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):
|
|
"""
|
|
Open the file in text mode, read it, and close the file.
|
|
"""
|
|
with self.open(mode='r', encoding=encoding, errors=errors) 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):
|
|
"""
|
|
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) as f:
|
|
return f.write(data)
|
|
|
|
def touch(self, mode=0o666, exist_ok=True):
|
|
"""
|
|
Create this file with the given access mode, if it doesn't exist.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
if exist_ok:
|
|
# First try to bump modification time
|
|
# Implementation note: GNU touch uses the UTIME_NOW option of
|
|
# the utimensat() / futimens() functions.
|
|
try:
|
|
self._accessor.utime(self, None)
|
|
except OSError:
|
|
# Avoid exception chaining
|
|
pass
|
|
else:
|
|
return
|
|
flags = os.O_CREAT | os.O_WRONLY
|
|
if not exist_ok:
|
|
flags |= os.O_EXCL
|
|
fd = self._raw_open(flags, mode)
|
|
os.close(fd)
|
|
|
|
def mkdir(self, mode=0o777, parents=False, exist_ok=False):
|
|
"""
|
|
Create a new directory at this given path.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
try:
|
|
self._accessor.mkdir(self, mode)
|
|
except FileNotFoundError:
|
|
if not parents or self.parent == self:
|
|
raise
|
|
self.parent.mkdir(parents=True, exist_ok=True)
|
|
self.mkdir(mode, parents=False, exist_ok=exist_ok)
|
|
except OSError:
|
|
# Cannot rely on checking for EEXIST, since the operating system
|
|
# could give priority to other errors like EACCES or EROFS
|
|
if not exist_ok or not self.is_dir():
|
|
raise
|
|
|
|
def chmod(self, mode):
|
|
"""
|
|
Change the permissions of the path, like os.chmod().
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
self._accessor.chmod(self, mode)
|
|
|
|
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.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
self._accessor.lchmod(self, mode)
|
|
|
|
def unlink(self):
|
|
"""
|
|
Remove this file or link.
|
|
If the path is a directory, use rmdir() instead.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
self._accessor.unlink(self)
|
|
|
|
def rmdir(self):
|
|
"""
|
|
Remove this directory. The directory must be empty.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
self._accessor.rmdir(self)
|
|
|
|
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.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
return self._accessor.lstat(self)
|
|
|
|
def rename(self, target):
|
|
"""
|
|
Rename this path to the given path.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
self._accessor.rename(self, target)
|
|
|
|
def replace(self, target):
|
|
"""
|
|
Rename this path to the given path, clobbering the existing
|
|
destination if it exists.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
self._accessor.replace(self, target)
|
|
|
|
def symlink_to(self, target, target_is_directory=False):
|
|
"""
|
|
Make this path a symlink pointing to the given path.
|
|
Note the order of arguments (self, target) is the reverse of os.symlink's.
|
|
"""
|
|
if self._closed:
|
|
self._raise_closed()
|
|
self._accessor.symlink(target, self, target_is_directory)
|
|
|
|
# Convenience functions for querying the stat results
|
|
|
|
def exists(self):
|
|
"""
|
|
Whether this path exists.
|
|
"""
|
|
try:
|
|
self.stat()
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
return False
|
|
return True
|
|
|
|
def is_dir(self):
|
|
"""
|
|
Whether this path is a directory.
|
|
"""
|
|
try:
|
|
return S_ISDIR(self.stat().st_mode)
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
# Path doesn't exist or is a broken symlink
|
|
# (see https://bitbucket.org/pitrou/pathlib/issue/12/)
|
|
return False
|
|
|
|
def is_file(self):
|
|
"""
|
|
Whether this path is a regular file (also True for symlinks pointing
|
|
to regular files).
|
|
"""
|
|
try:
|
|
return S_ISREG(self.stat().st_mode)
|
|
except OSError as e:
|
|
if not _ignore_error(e):
|
|
raise
|
|
# Path doesn't exist or is a broken symlink
|
|
# (see https://bitbucket.org/pitrou/pathlib/issue/12/)
|
|
return False
|
|
|
|
def is_mount(self):
|
|
"""
|
|
Check if this path is a POSIX mount point
|
|
"""
|
|
# Need to exist and be a dir
|
|
if not self.exists() or not self.is_dir():
|
|
return False
|
|
|
|
parent = Path(self.parent)
|
|
try:
|
|
parent_dev = 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 = 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
|
|
|
|
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 https://bitbucket.org/pitrou/pathlib/issue/12/)
|
|
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 https://bitbucket.org/pitrou/pathlib/issue/12/)
|
|
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 https://bitbucket.org/pitrou/pathlib/issue/12/)
|
|
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 https://bitbucket.org/pitrou/pathlib/issue/12/)
|
|
return False
|
|
|
|
def expanduser(self):
|
|
""" Return a new path with expanded ~ and ~user constructs
|
|
(as returned by os.path.expanduser)
|
|
"""
|
|
if (not (self._drv or self._root) and
|
|
self._parts and self._parts[0][:1] == '~'):
|
|
homedir = self._flavour.gethomedir(self._parts[0][1:])
|
|
return self._from_parts([homedir] + self._parts[1:])
|
|
|
|
return self
|
|
|
|
|
|
class PosixPath(Path, PurePosixPath):
|
|
"""Path subclass for non-Windows systems.
|
|
|
|
On a POSIX system, instantiating a Path should return this object.
|
|
"""
|
|
__slots__ = ()
|
|
|
|
class WindowsPath(Path, PureWindowsPath):
|
|
"""Path subclass for Windows systems.
|
|
|
|
On a Windows system, instantiating a Path should return this object.
|
|
"""
|
|
__slots__ = ()
|
|
|
|
def owner(self):
|
|
raise NotImplementedError("Path.owner() is unsupported on this system")
|
|
|
|
def group(self):
|
|
raise NotImplementedError("Path.group() is unsupported on this system")
|
|
|
|
def is_mount(self):
|
|
raise NotImplementedError("Path.is_mount() is unsupported on this system")
|