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"""local path implementation."""
from __future__ import annotations
import atexit
import fnmatch
import importlib.util
import io
import os
import posixpath
import sys
import uuid
import warnings
from contextlib import contextmanager
from os.path import abspath
from os.path import dirname
from os.path import exists
from os.path import isabs
from os.path import isdir
from os.path import isfile
from os.path import islink
from os.path import normpath
from stat import S_ISDIR
from stat import S_ISLNK
from stat import S_ISREG
from typing import Any
from typing import Callable
from typing import cast
from typing import overload
from typing import TYPE_CHECKING
from . import error
if TYPE_CHECKING:
from typing import Literal
# Moved from local.py.
iswin32 = sys.platform == "win32" or (getattr(os, "_name", False) == "nt")
class Checkers:
_depend_on_existence = "exists", "link", "dir", "file"
def __init__(self, path):
self.path = path
def dotfile(self):
return self.path.basename.startswith(".")
def ext(self, arg):
if not arg.startswith("."):
arg = "." + arg
return self.path.ext == arg
def basename(self, arg):
return self.path.basename == arg
def basestarts(self, arg):
return self.path.basename.startswith(arg)
def relto(self, arg):
return self.path.relto(arg)
def fnmatch(self, arg):
return self.path.fnmatch(arg)
def endswith(self, arg):
return str(self.path).endswith(arg)
def _evaluate(self, kw):
from .._code.source import getrawcode
for name, value in kw.items():
invert = False
meth = None
try:
meth = getattr(self, name)
except AttributeError:
if name[:3] == "not":
invert = True
try:
meth = getattr(self, name[3:])
except AttributeError:
pass
if meth is None:
raise TypeError(f"no {name!r} checker available for {self.path!r}")
try:
if getrawcode(meth).co_argcount > 1:
if (not meth(value)) ^ invert:
return False
else:
if bool(value) ^ bool(meth()) ^ invert:
return False
except (error.ENOENT, error.ENOTDIR, error.EBUSY):
# EBUSY feels not entirely correct,
# but its kind of necessary since ENOMEDIUM
# is not accessible in python
for name in self._depend_on_existence:
if name in kw:
if kw.get(name):
return False
name = "not" + name
if name in kw:
if not kw.get(name):
return False
return True
_statcache: Stat
def _stat(self) -> Stat:
try:
return self._statcache
except AttributeError:
try:
self._statcache = self.path.stat()
except error.ELOOP:
self._statcache = self.path.lstat()
return self._statcache
def dir(self):
return S_ISDIR(self._stat().mode)
def file(self):
return S_ISREG(self._stat().mode)
def exists(self):
return self._stat()
def link(self):
st = self.path.lstat()
return S_ISLNK(st.mode)
class NeverRaised(Exception):
pass
class Visitor:
def __init__(self, fil, rec, ignore, bf, sort):
if isinstance(fil, str):
fil = FNMatcher(fil)
if isinstance(rec, str):
self.rec: Callable[[LocalPath], bool] = FNMatcher(rec)
elif not hasattr(rec, "__call__") and rec:
self.rec = lambda path: True
else:
self.rec = rec
self.fil = fil
self.ignore = ignore
self.breadthfirst = bf
self.optsort = cast(Callable[[Any], Any], sorted) if sort else (lambda x: x)
def gen(self, path):
try:
entries = path.listdir()
except self.ignore:
return
rec = self.rec
dirs = self.optsort(
[p for p in entries if p.check(dir=1) and (rec is None or rec(p))]
)
if not self.breadthfirst:
for subdir in dirs:
for p in self.gen(subdir):
yield p
for p in self.optsort(entries):
if self.fil is None or self.fil(p):
yield p
if self.breadthfirst:
for subdir in dirs:
for p in self.gen(subdir):
yield p
class FNMatcher:
def __init__(self, pattern):
self.pattern = pattern
def __call__(self, path):
pattern = self.pattern
if (
pattern.find(path.sep) == -1
and iswin32
and pattern.find(posixpath.sep) != -1
):
# Running on Windows, the pattern has no Windows path separators,
# and the pattern has one or more Posix path separators. Replace
# the Posix path separators with the Windows path separator.
pattern = pattern.replace(posixpath.sep, path.sep)
if pattern.find(path.sep) == -1:
name = path.basename
else:
name = str(path) # path.strpath # XXX svn?
if not os.path.isabs(pattern):
pattern = "*" + path.sep + pattern
return fnmatch.fnmatch(name, pattern)
def map_as_list(func, iter):
return list(map(func, iter))
class Stat:
if TYPE_CHECKING:
@property
def size(self) -> int:
...
@property
def mtime(self) -> float:
...
def __getattr__(self, name: str) -> Any:
return getattr(self._osstatresult, "st_" + name)
def __init__(self, path, osstatresult):
self.path = path
self._osstatresult = osstatresult
@property
def owner(self):
if iswin32:
raise NotImplementedError("XXX win32")
import pwd
entry = error.checked_call(pwd.getpwuid, self.uid) # type:ignore[attr-defined]
return entry[0]
@property
def group(self):
"""Return group name of file."""
if iswin32:
raise NotImplementedError("XXX win32")
import grp
entry = error.checked_call(grp.getgrgid, self.gid) # type:ignore[attr-defined]
return entry[0]
def isdir(self):
return S_ISDIR(self._osstatresult.st_mode)
def isfile(self):
return S_ISREG(self._osstatresult.st_mode)
def islink(self):
self.path.lstat()
return S_ISLNK(self._osstatresult.st_mode)
def getuserid(user):
import pwd
if not isinstance(user, int):
user = pwd.getpwnam(user)[2] # type:ignore[attr-defined]
return user
def getgroupid(group):
import grp
if not isinstance(group, int):
group = grp.getgrnam(group)[2] # type:ignore[attr-defined]
return group
class LocalPath:
"""Object oriented interface to os.path and other local filesystem
related information.
"""
class ImportMismatchError(ImportError):
"""raised on pyimport() if there is a mismatch of __file__'s"""
sep = os.sep
def __init__(self, path=None, expanduser=False):
"""Initialize and return a local Path instance.
Path can be relative to the current directory.
If path is None it defaults to the current working directory.
If expanduser is True, tilde-expansion is performed.
Note that Path instances always carry an absolute path.
Note also that passing in a local path object will simply return
the exact same path object. Use new() to get a new copy.
"""
if path is None:
self.strpath = error.checked_call(os.getcwd)
else:
try:
path = os.fspath(path)
except TypeError:
raise ValueError(
"can only pass None, Path instances "
"or non-empty strings to LocalPath"
)
if expanduser:
path = os.path.expanduser(path)
self.strpath = abspath(path)
if sys.platform != "win32":
def chown(self, user, group, rec=0):
"""Change ownership to the given user and group.
user and group may be specified by a number or
by a name. if rec is True change ownership
recursively.
"""
uid = getuserid(user)
gid = getgroupid(group)
if rec:
for x in self.visit(rec=lambda x: x.check(link=0)):
if x.check(link=0):
error.checked_call(os.chown, str(x), uid, gid)
error.checked_call(os.chown, str(self), uid, gid)
def readlink(self) -> str:
"""Return value of a symbolic link."""
# https://github.com/python/mypy/issues/12278
return error.checked_call(os.readlink, self.strpath) # type: ignore[arg-type,return-value]
def mklinkto(self, oldname):
"""Posix style hard link to another name."""
error.checked_call(os.link, str(oldname), str(self))
def mksymlinkto(self, value, absolute=1):
"""Create a symbolic link with the given value (pointing to another name)."""
if absolute:
error.checked_call(os.symlink, str(value), self.strpath)
else:
base = self.common(value)
# with posix local paths '/' is always a common base
relsource = self.__class__(value).relto(base)
reldest = self.relto(base)
n = reldest.count(self.sep)
target = self.sep.join(("..",) * n + (relsource,))
error.checked_call(os.symlink, target, self.strpath)
def __div__(self, other):
return self.join(os.fspath(other))
__truediv__ = __div__ # py3k
@property
def basename(self):
"""Basename part of path."""
return self._getbyspec("basename")[0]
@property
def dirname(self):
"""Dirname part of path."""
return self._getbyspec("dirname")[0]
@property
def purebasename(self):
"""Pure base name of the path."""
return self._getbyspec("purebasename")[0]
@property
def ext(self):
"""Extension of the path (including the '.')."""
return self._getbyspec("ext")[0]
def read_binary(self):
"""Read and return a bytestring from reading the path."""
with self.open("rb") as f:
return f.read()
def read_text(self, encoding):
"""Read and return a Unicode string from reading the path."""
with self.open("r", encoding=encoding) as f:
return f.read()
def read(self, mode="r"):
"""Read and return a bytestring from reading the path."""
with self.open(mode) as f:
return f.read()
def readlines(self, cr=1):
"""Read and return a list of lines from the path. if cr is False, the
newline will be removed from the end of each line."""
mode = "r"
if not cr:
content = self.read(mode)
return content.split("\n")
else:
f = self.open(mode)
try:
return f.readlines()
finally:
f.close()
def load(self):
"""(deprecated) return object unpickled from self.read()"""
f = self.open("rb")
try:
import pickle
return error.checked_call(pickle.load, f)
finally:
f.close()
def move(self, target):
"""Move this path to target."""
if target.relto(self):
raise error.EINVAL(target, "cannot move path into a subdirectory of itself")
try:
self.rename(target)
except error.EXDEV: # invalid cross-device link
self.copy(target)
self.remove()
def fnmatch(self, pattern):
"""Return true if the basename/fullname matches the glob-'pattern'.
valid pattern characters::
* matches everything
? matches any single character
[seq] matches any character in seq
[!seq] matches any char not in seq
If the pattern contains a path-separator then the full path
is used for pattern matching and a '*' is prepended to the
pattern.
if the pattern doesn't contain a path-separator the pattern
is only matched against the basename.
"""
return FNMatcher(pattern)(self)
def relto(self, relpath):
"""Return a string which is the relative part of the path
to the given 'relpath'.
"""
if not isinstance(relpath, (str, LocalPath)):
raise TypeError(f"{relpath!r}: not a string or path object")
strrelpath = str(relpath)
if strrelpath and strrelpath[-1] != self.sep:
strrelpath += self.sep
# assert strrelpath[-1] == self.sep
# assert strrelpath[-2] != self.sep
strself = self.strpath
if sys.platform == "win32" or getattr(os, "_name", None) == "nt":
if os.path.normcase(strself).startswith(os.path.normcase(strrelpath)):
return strself[len(strrelpath) :]
elif strself.startswith(strrelpath):
return strself[len(strrelpath) :]
return ""
def ensure_dir(self, *args):
"""Ensure the path joined with args is a directory."""
return self.ensure(*args, **{"dir": True})
def bestrelpath(self, dest):
"""Return a string which is a relative path from self
(assumed to be a directory) to dest such that
self.join(bestrelpath) == dest and if not such
path can be determined return dest.
"""
try:
if self == dest:
return os.curdir
base = self.common(dest)
if not base: # can be the case on windows
return str(dest)
self2base = self.relto(base)
reldest = dest.relto(base)
if self2base:
n = self2base.count(self.sep) + 1
else:
n = 0
lst = [os.pardir] * n
if reldest:
lst.append(reldest)
target = dest.sep.join(lst)
return target
except AttributeError:
return str(dest)
def exists(self):
return self.check()
def isdir(self):
return self.check(dir=1)
def isfile(self):
return self.check(file=1)
def parts(self, reverse=False):
"""Return a root-first list of all ancestor directories
plus the path itself.
"""
current = self
lst = [self]
while 1:
last = current
current = current.dirpath()
if last == current:
break
lst.append(current)
if not reverse:
lst.reverse()
return lst
def common(self, other):
"""Return the common part shared with the other path
or None if there is no common part.
"""
last = None
for x, y in zip(self.parts(), other.parts()):
if x != y:
return last
last = x
return last
def __add__(self, other):
"""Return new path object with 'other' added to the basename"""
return self.new(basename=self.basename + str(other))
def visit(self, fil=None, rec=None, ignore=NeverRaised, bf=False, sort=False):
"""Yields all paths below the current one
fil is a filter (glob pattern or callable), if not matching the
path will not be yielded, defaulting to None (everything is
returned)
rec is a filter (glob pattern or callable) that controls whether
a node is descended, defaulting to None
ignore is an Exception class that is ignoredwhen calling dirlist()
on any of the paths (by default, all exceptions are reported)
bf if True will cause a breadthfirst search instead of the
default depthfirst. Default: False
sort if True will sort entries within each directory level.
"""
yield from Visitor(fil, rec, ignore, bf, sort).gen(self)
def _sortlist(self, res, sort):
if sort:
if hasattr(sort, "__call__"):
warnings.warn(
DeprecationWarning(
"listdir(sort=callable) is deprecated and breaks on python3"
),
stacklevel=3,
)
res.sort(sort)
else:
res.sort()
def __fspath__(self):
return self.strpath
def __hash__(self):
s = self.strpath
if iswin32:
s = s.lower()
return hash(s)
def __eq__(self, other):
s1 = os.fspath(self)
try:
s2 = os.fspath(other)
except TypeError:
return False
if iswin32:
s1 = s1.lower()
try:
s2 = s2.lower()
except AttributeError:
return False
return s1 == s2
def __ne__(self, other):
return not (self == other)
def __lt__(self, other):
return os.fspath(self) < os.fspath(other)
def __gt__(self, other):
return os.fspath(self) > os.fspath(other)
def samefile(self, other):
"""Return True if 'other' references the same file as 'self'."""
other = os.fspath(other)
if not isabs(other):
other = abspath(other)
if self == other:
return True
if not hasattr(os.path, "samefile"):
return False
return error.checked_call(os.path.samefile, self.strpath, other)
def remove(self, rec=1, ignore_errors=False):
"""Remove a file or directory (or a directory tree if rec=1).
if ignore_errors is True, errors while removing directories will
be ignored.
"""
if self.check(dir=1, link=0):
if rec:
# force remove of readonly files on windows
if iswin32:
self.chmod(0o700, rec=1)
import shutil
error.checked_call(
shutil.rmtree, self.strpath, ignore_errors=ignore_errors
)
else:
error.checked_call(os.rmdir, self.strpath)
else:
if iswin32:
self.chmod(0o700)
error.checked_call(os.remove, self.strpath)
def computehash(self, hashtype="md5", chunksize=524288):
"""Return hexdigest of hashvalue for this file."""
try:
try:
import hashlib as mod
except ImportError:
if hashtype == "sha1":
hashtype = "sha"
mod = __import__(hashtype)
hash = getattr(mod, hashtype)()
except (AttributeError, ImportError):
raise ValueError(f"Don't know how to compute {hashtype!r} hash")
f = self.open("rb")
try:
while 1:
buf = f.read(chunksize)
if not buf:
return hash.hexdigest()
hash.update(buf)
finally:
f.close()
def new(self, **kw):
"""Create a modified version of this path.
the following keyword arguments modify various path parts::
a:/some/path/to/a/file.ext
xx drive
xxxxxxxxxxxxxxxxx dirname
xxxxxxxx basename
xxxx purebasename
xxx ext
"""
obj = object.__new__(self.__class__)
if not kw:
obj.strpath = self.strpath
return obj
drive, dirname, basename, purebasename, ext = self._getbyspec(
"drive,dirname,basename,purebasename,ext"
)
if "basename" in kw:
if "purebasename" in kw or "ext" in kw:
raise ValueError("invalid specification %r" % kw)
else:
pb = kw.setdefault("purebasename", purebasename)
try:
ext = kw["ext"]
except KeyError:
pass
else:
if ext and not ext.startswith("."):
ext = "." + ext
kw["basename"] = pb + ext
if "dirname" in kw and not kw["dirname"]:
kw["dirname"] = drive
else:
kw.setdefault("dirname", dirname)
kw.setdefault("sep", self.sep)
obj.strpath = normpath("%(dirname)s%(sep)s%(basename)s" % kw)
return obj
def _getbyspec(self, spec: str) -> list[str]:
"""See new for what 'spec' can be."""
res = []
parts = self.strpath.split(self.sep)
args = filter(None, spec.split(","))
for name in args:
if name == "drive":
res.append(parts[0])
elif name == "dirname":
res.append(self.sep.join(parts[:-1]))
else:
basename = parts[-1]
if name == "basename":
res.append(basename)
else:
i = basename.rfind(".")
if i == -1:
purebasename, ext = basename, ""
else:
purebasename, ext = basename[:i], basename[i:]
if name == "purebasename":
res.append(purebasename)
elif name == "ext":
res.append(ext)
else:
raise ValueError("invalid part specification %r" % name)
return res
def dirpath(self, *args, **kwargs):
"""Return the directory path joined with any given path arguments."""
if not kwargs:
path = object.__new__(self.__class__)
path.strpath = dirname(self.strpath)
if args:
path = path.join(*args)
return path
return self.new(basename="").join(*args, **kwargs)
def join(self, *args: os.PathLike[str], abs: bool = False) -> LocalPath:
"""Return a new path by appending all 'args' as path
components. if abs=1 is used restart from root if any
of the args is an absolute path.
"""
sep = self.sep
strargs = [os.fspath(arg) for arg in args]
strpath = self.strpath
if abs:
newargs: list[str] = []
for arg in reversed(strargs):
if isabs(arg):
strpath = arg
strargs = newargs
break
newargs.insert(0, arg)
# special case for when we have e.g. strpath == "/"
actual_sep = "" if strpath.endswith(sep) else sep
for arg in strargs:
arg = arg.strip(sep)
if iswin32:
# allow unix style paths even on windows.
arg = arg.strip("/")
arg = arg.replace("/", sep)
strpath = strpath + actual_sep + arg
actual_sep = sep
obj = object.__new__(self.__class__)
obj.strpath = normpath(strpath)
return obj
def open(self, mode="r", ensure=False, encoding=None):
"""Return an opened file with the given mode.
If ensure is True, create parent directories if needed.
"""
if ensure:
self.dirpath().ensure(dir=1)
if encoding:
return error.checked_call(io.open, self.strpath, mode, encoding=encoding)
return error.checked_call(open, self.strpath, mode)
def _fastjoin(self, name):
child = object.__new__(self.__class__)
child.strpath = self.strpath + self.sep + name
return child
def islink(self):
return islink(self.strpath)
def check(self, **kw):
"""Check a path for existence and properties.
Without arguments, return True if the path exists, otherwise False.
valid checkers::
file=1 # is a file
file=0 # is not a file (may not even exist)
dir=1 # is a dir
link=1 # is a link
exists=1 # exists
You can specify multiple checker definitions, for example::
path.check(file=1, link=1) # a link pointing to a file
"""
if not kw:
return exists(self.strpath)
if len(kw) == 1:
if "dir" in kw:
return not kw["dir"] ^ isdir(self.strpath)
if "file" in kw:
return not kw["file"] ^ isfile(self.strpath)
if not kw:
kw = {"exists": 1}
return Checkers(self)._evaluate(kw)
_patternchars = set("*?[" + os.sep)
def listdir(self, fil=None, sort=None):
"""List directory contents, possibly filter by the given fil func
and possibly sorted.
"""
if fil is None and sort is None:
names = error.checked_call(os.listdir, self.strpath)
return map_as_list(self._fastjoin, names)
if isinstance(fil, str):
if not self._patternchars.intersection(fil):
child = self._fastjoin(fil)
if exists(child.strpath):
return [child]
return []
fil = FNMatcher(fil)
names = error.checked_call(os.listdir, self.strpath)
res = []
for name in names:
child = self._fastjoin(name)
if fil is None or fil(child):
res.append(child)
self._sortlist(res, sort)
return res
def size(self) -> int:
"""Return size of the underlying file object"""
return self.stat().size
def mtime(self) -> float:
"""Return last modification time of the path."""
return self.stat().mtime
def copy(self, target, mode=False, stat=False):
"""Copy path to target.
If mode is True, will copy copy permission from path to target.
If stat is True, copy permission, last modification
time, last access time, and flags from path to target.
"""
if self.check(file=1):
if target.check(dir=1):
target = target.join(self.basename)
assert self != target
copychunked(self, target)
if mode:
copymode(self.strpath, target.strpath)
if stat:
copystat(self, target)
else:
def rec(p):
return p.check(link=0)
for x in self.visit(rec=rec):
relpath = x.relto(self)
newx = target.join(relpath)
newx.dirpath().ensure(dir=1)
if x.check(link=1):
newx.mksymlinkto(x.readlink())
continue
elif x.check(file=1):
copychunked(x, newx)
elif x.check(dir=1):
newx.ensure(dir=1)
if mode:
copymode(x.strpath, newx.strpath)
if stat:
copystat(x, newx)
def rename(self, target):
"""Rename this path to target."""
target = os.fspath(target)
return error.checked_call(os.rename, self.strpath, target)
def dump(self, obj, bin=1):
"""Pickle object into path location"""
f = self.open("wb")
import pickle
try:
error.checked_call(pickle.dump, obj, f, bin)
finally:
f.close()
def mkdir(self, *args):
"""Create & return the directory joined with args."""
p = self.join(*args)
error.checked_call(os.mkdir, os.fspath(p))
return p
def write_binary(self, data, ensure=False):
"""Write binary data into path. If ensure is True create
missing parent directories.
"""
if ensure:
self.dirpath().ensure(dir=1)
with self.open("wb") as f:
f.write(data)
def write_text(self, data, encoding, ensure=False):
"""Write text data into path using the specified encoding.
If ensure is True create missing parent directories.
"""
if ensure:
self.dirpath().ensure(dir=1)
with self.open("w", encoding=encoding) as f:
f.write(data)
def write(self, data, mode="w", ensure=False):
"""Write data into path. If ensure is True create
missing parent directories.
"""
if ensure:
self.dirpath().ensure(dir=1)
if "b" in mode:
if not isinstance(data, bytes):
raise ValueError("can only process bytes")
else:
if not isinstance(data, str):
if not isinstance(data, bytes):
data = str(data)
else:
data = data.decode(sys.getdefaultencoding())
f = self.open(mode)
try:
f.write(data)
finally:
f.close()
def _ensuredirs(self):
parent = self.dirpath()
if parent == self:
return self
if parent.check(dir=0):
parent._ensuredirs()
if self.check(dir=0):
try:
self.mkdir()
except error.EEXIST:
# race condition: file/dir created by another thread/process.
# complain if it is not a dir
if self.check(dir=0):
raise
return self
def ensure(self, *args, **kwargs):
"""Ensure that an args-joined path exists (by default as
a file). if you specify a keyword argument 'dir=True'
then the path is forced to be a directory path.
"""
p = self.join(*args)
if kwargs.get("dir", 0):
return p._ensuredirs()
else:
p.dirpath()._ensuredirs()
if not p.check(file=1):
p.open("wb").close()
return p
@overload
def stat(self, raising: Literal[True] = ...) -> Stat:
...
@overload
def stat(self, raising: Literal[False]) -> Stat | None:
...
def stat(self, raising: bool = True) -> Stat | None:
"""Return an os.stat() tuple."""
if raising:
return Stat(self, error.checked_call(os.stat, self.strpath))
try:
return Stat(self, os.stat(self.strpath))
except KeyboardInterrupt:
raise
except Exception:
return None
def lstat(self) -> Stat:
"""Return an os.lstat() tuple."""
return Stat(self, error.checked_call(os.lstat, self.strpath))
def setmtime(self, mtime=None):
"""Set modification time for the given path. if 'mtime' is None
(the default) then the file's mtime is set to current time.
Note that the resolution for 'mtime' is platform dependent.
"""
if mtime is None:
return error.checked_call(os.utime, self.strpath, mtime)
try:
return error.checked_call(os.utime, self.strpath, (-1, mtime))
except error.EINVAL:
return error.checked_call(os.utime, self.strpath, (self.atime(), mtime))
def chdir(self):
"""Change directory to self and return old current directory"""
try:
old = self.__class__()
except error.ENOENT:
old = None
error.checked_call(os.chdir, self.strpath)
return old
@contextmanager
def as_cwd(self):
"""
Return a context manager, which changes to the path's dir during the
managed "with" context.
On __enter__ it returns the old dir, which might be ``None``.
"""
old = self.chdir()
try:
yield old
finally:
if old is not None:
old.chdir()
def realpath(self):
"""Return a new path which contains no symbolic links."""
return self.__class__(os.path.realpath(self.strpath))
def atime(self):
"""Return last access time of the path."""
return self.stat().atime
def __repr__(self):
return "local(%r)" % self.strpath
def __str__(self):
"""Return string representation of the Path."""
return self.strpath
def chmod(self, mode, rec=0):
"""Change permissions to the given mode. If mode is an
integer it directly encodes the os-specific modes.
if rec is True perform recursively.
"""
if not isinstance(mode, int):
raise TypeError(f"mode {mode!r} must be an integer")
if rec:
for x in self.visit(rec=rec):
error.checked_call(os.chmod, str(x), mode)
error.checked_call(os.chmod, self.strpath, mode)
def pypkgpath(self):
"""Return the Python package path by looking for the last
directory upwards which still contains an __init__.py.
Return None if a pkgpath can not be determined.
"""
pkgpath = None
for parent in self.parts(reverse=True):
if parent.isdir():
if not parent.join("__init__.py").exists():
break
if not isimportable(parent.basename):
break
pkgpath = parent
return pkgpath
def _ensuresyspath(self, ensuremode, path):
if ensuremode:
s = str(path)
if ensuremode == "append":
if s not in sys.path:
sys.path.append(s)
else:
if s != sys.path[0]:
sys.path.insert(0, s)
def pyimport(self, modname=None, ensuresyspath=True):
"""Return path as an imported python module.
If modname is None, look for the containing package
and construct an according module name.
The module will be put/looked up in sys.modules.
if ensuresyspath is True then the root dir for importing
the file (taking __init__.py files into account) will
be prepended to sys.path if it isn't there already.
If ensuresyspath=="append" the root dir will be appended
if it isn't already contained in sys.path.
if ensuresyspath is False no modification of syspath happens.
Special value of ensuresyspath=="importlib" is intended
purely for using in pytest, it is capable only of importing
separate .py files outside packages, e.g. for test suite
without any __init__.py file. It effectively allows having
same-named test modules in different places and offers
mild opt-in via this option. Note that it works only in
recent versions of python.
"""
if not self.check():
raise error.ENOENT(self)
if ensuresyspath == "importlib":
if modname is None:
modname = self.purebasename
spec = importlib.util.spec_from_file_location(modname, str(self))
if spec is None or spec.loader is None:
raise ImportError(
f"Can't find module {modname} at location {str(self)}"
)
mod = importlib.util.module_from_spec(spec)
spec.loader.exec_module(mod)
return mod
pkgpath = None
if modname is None:
pkgpath = self.pypkgpath()
if pkgpath is not None:
pkgroot = pkgpath.dirpath()
names = self.new(ext="").relto(pkgroot).split(self.sep)
if names[-1] == "__init__":
names.pop()
modname = ".".join(names)
else:
pkgroot = self.dirpath()
modname = self.purebasename
self._ensuresyspath(ensuresyspath, pkgroot)
__import__(modname)
mod = sys.modules[modname]
if self.basename == "__init__.py":
return mod # we don't check anything as we might
# be in a namespace package ... too icky to check
modfile = mod.__file__
assert modfile is not None
if modfile[-4:] in (".pyc", ".pyo"):
modfile = modfile[:-1]
elif modfile.endswith("$py.class"):
modfile = modfile[:-9] + ".py"
if modfile.endswith(os.sep + "__init__.py"):
if self.basename != "__init__.py":
modfile = modfile[:-12]
try:
issame = self.samefile(modfile)
except error.ENOENT:
issame = False
if not issame:
ignore = os.getenv("PY_IGNORE_IMPORTMISMATCH")
if ignore != "1":
raise self.ImportMismatchError(modname, modfile, self)
return mod
else:
try:
return sys.modules[modname]
except KeyError:
# we have a custom modname, do a pseudo-import
import types
mod = types.ModuleType(modname)
mod.__file__ = str(self)
sys.modules[modname] = mod
try:
with open(str(self), "rb") as f:
exec(f.read(), mod.__dict__)
except BaseException:
del sys.modules[modname]
raise
return mod
def sysexec(self, *argv: os.PathLike[str], **popen_opts: Any) -> str:
"""Return stdout text from executing a system child process,
where the 'self' path points to executable.
The process is directly invoked and not through a system shell.
"""
from subprocess import Popen, PIPE
popen_opts.pop("stdout", None)
popen_opts.pop("stderr", None)
proc = Popen(
[str(self)] + [str(arg) for arg in argv],
**popen_opts,
stdout=PIPE,
stderr=PIPE,
)
stdout: str | bytes
stdout, stderr = proc.communicate()
ret = proc.wait()
if isinstance(stdout, bytes):
stdout = stdout.decode(sys.getdefaultencoding())
if ret != 0:
if isinstance(stderr, bytes):
stderr = stderr.decode(sys.getdefaultencoding())
raise RuntimeError(
ret,
ret,
str(self),
stdout,
stderr,
)
return stdout
@classmethod
def sysfind(cls, name, checker=None, paths=None):
"""Return a path object found by looking at the systems
underlying PATH specification. If the checker is not None
it will be invoked to filter matching paths. If a binary
cannot be found, None is returned
Note: This is probably not working on plain win32 systems
but may work on cygwin.
"""
if isabs(name):
p = local(name)
if p.check(file=1):
return p
else:
if paths is None:
if iswin32:
paths = os.environ["Path"].split(";")
if "" not in paths and "." not in paths:
paths.append(".")
try:
systemroot = os.environ["SYSTEMROOT"]
except KeyError:
pass
else:
paths = [
path.replace("%SystemRoot%", systemroot) for path in paths
]
else:
paths = os.environ["PATH"].split(":")
tryadd = []
if iswin32:
tryadd += os.environ["PATHEXT"].split(os.pathsep)
tryadd.append("")
for x in paths:
for addext in tryadd:
p = local(x).join(name, abs=True) + addext
try:
if p.check(file=1):
if checker:
if not checker(p):
continue
return p
except error.EACCES:
pass
return None
@classmethod
def _gethomedir(cls):
try:
x = os.environ["HOME"]
except KeyError:
try:
x = os.environ["HOMEDRIVE"] + os.environ["HOMEPATH"]
except KeyError:
return None
return cls(x)
# """
# special class constructors for local filesystem paths
# """
@classmethod
def get_temproot(cls):
"""Return the system's temporary directory
(where tempfiles are usually created in)
"""
import tempfile
return local(tempfile.gettempdir())
@classmethod
def mkdtemp(cls, rootdir=None):
"""Return a Path object pointing to a fresh new temporary directory
(which we created ourself).
"""
import tempfile
if rootdir is None:
rootdir = cls.get_temproot()
return cls(error.checked_call(tempfile.mkdtemp, dir=str(rootdir)))
@classmethod
def make_numbered_dir(
cls, prefix="session-", rootdir=None, keep=3, lock_timeout=172800
): # two days
"""Return unique directory with a number greater than the current
maximum one. The number is assumed to start directly after prefix.
if keep is true directories with a number less than (maxnum-keep)
will be removed. If .lock files are used (lock_timeout non-zero),
algorithm is multi-process safe.
"""
if rootdir is None:
rootdir = cls.get_temproot()
nprefix = prefix.lower()
def parse_num(path):
"""Parse the number out of a path (if it matches the prefix)"""
nbasename = path.basename.lower()
if nbasename.startswith(nprefix):
try:
return int(nbasename[len(nprefix) :])
except ValueError:
pass
def create_lockfile(path):
"""Exclusively create lockfile. Throws when failed"""
mypid = os.getpid()
lockfile = path.join(".lock")
if hasattr(lockfile, "mksymlinkto"):
lockfile.mksymlinkto(str(mypid))
else:
fd = error.checked_call(
os.open, str(lockfile), os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0o644
)
with os.fdopen(fd, "w") as f:
f.write(str(mypid))
return lockfile
def atexit_remove_lockfile(lockfile):
"""Ensure lockfile is removed at process exit"""
mypid = os.getpid()
def try_remove_lockfile():
# in a fork() situation, only the last process should
# remove the .lock, otherwise the other processes run the
# risk of seeing their temporary dir disappear. For now
# we remove the .lock in the parent only (i.e. we assume
# that the children finish before the parent).
if os.getpid() != mypid:
return
try:
lockfile.remove()
except error.Error:
pass
atexit.register(try_remove_lockfile)
# compute the maximum number currently in use with the prefix
lastmax = None
while True:
maxnum = -1
for path in rootdir.listdir():
num = parse_num(path)
if num is not None:
maxnum = max(maxnum, num)
# make the new directory
try:
udir = rootdir.mkdir(prefix + str(maxnum + 1))
if lock_timeout:
lockfile = create_lockfile(udir)
atexit_remove_lockfile(lockfile)
except (error.EEXIST, error.ENOENT, error.EBUSY):
# race condition (1): another thread/process created the dir
# in the meantime - try again
# race condition (2): another thread/process spuriously acquired
# lock treating empty directory as candidate
# for removal - try again
# race condition (3): another thread/process tried to create the lock at
# the same time (happened in Python 3.3 on Windows)
# https://ci.appveyor.com/project/pytestbot/py/build/1.0.21/job/ffi85j4c0lqwsfwa
if lastmax == maxnum:
raise
lastmax = maxnum
continue
break
def get_mtime(path):
"""Read file modification time"""
try:
return path.lstat().mtime
except error.Error:
pass
garbage_prefix = prefix + "garbage-"
def is_garbage(path):
"""Check if path denotes directory scheduled for removal"""
bn = path.basename
return bn.startswith(garbage_prefix)
# prune old directories
udir_time = get_mtime(udir)
if keep and udir_time:
for path in rootdir.listdir():
num = parse_num(path)
if num is not None and num <= (maxnum - keep):
try:
# try acquiring lock to remove directory as exclusive user
if lock_timeout:
create_lockfile(path)
except (error.EEXIST, error.ENOENT, error.EBUSY):
path_time = get_mtime(path)
if not path_time:
# assume directory doesn't exist now
continue
if abs(udir_time - path_time) < lock_timeout:
# assume directory with lockfile exists
# and lock timeout hasn't expired yet
continue
# path dir locked for exclusive use
# and scheduled for removal to avoid another thread/process
# treating it as a new directory or removal candidate
garbage_path = rootdir.join(garbage_prefix + str(uuid.uuid4()))
try:
path.rename(garbage_path)
garbage_path.remove(rec=1)
except KeyboardInterrupt:
raise
except Exception: # this might be error.Error, WindowsError ...
pass
if is_garbage(path):
try:
path.remove(rec=1)
except KeyboardInterrupt:
raise
except Exception: # this might be error.Error, WindowsError ...
pass
# make link...
try:
username = os.environ["USER"] # linux, et al
except KeyError:
try:
username = os.environ["USERNAME"] # windows
except KeyError:
username = "current"
src = str(udir)
dest = src[: src.rfind("-")] + "-" + username
try:
os.unlink(dest)
except OSError:
pass
try:
os.symlink(src, dest)
except (OSError, AttributeError, NotImplementedError):
pass
return udir
def copymode(src, dest):
"""Copy permission from src to dst."""
import shutil
shutil.copymode(src, dest)
def copystat(src, dest):
"""Copy permission, last modification time,
last access time, and flags from src to dst."""
import shutil
shutil.copystat(str(src), str(dest))
def copychunked(src, dest):
chunksize = 524288 # half a meg of bytes
fsrc = src.open("rb")
try:
fdest = dest.open("wb")
try:
while 1:
buf = fsrc.read(chunksize)
if not buf:
break
fdest.write(buf)
finally:
fdest.close()
finally:
fsrc.close()
def isimportable(name):
if name and (name[0].isalpha() or name[0] == "_"):
name = name.replace("_", "")
return not name or name.isalnum()
local = LocalPath
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