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from __future__ import with_statement
import os
import sys
import glob
import shutil
import errno
import logging
from contextlib import contextmanager
from plumbum.lib import _setdoc, IS_WIN32
from plumbum.path.base import Path, FSUser
from plumbum.path.remote import RemotePath
try:
from pwd import getpwuid, getpwnam
from grp import getgrgid, getgrnam
except ImportError:
def getpwuid(x):
return (None,)
def getgrgid(x):
return (None,)
def getpwnam(x):
raise OSError("`getpwnam` not supported")
def getgrnam(x):
raise OSError("`getgrnam` not supported")
logger = logging.getLogger("plumbum.local")
#===================================================================================================
# Local Paths
#===================================================================================================
class LocalPath(Path):
"""The class implementing local-machine paths"""
__slots__ = ["_path"]
CASE_SENSITIVE = not IS_WIN32
def __init__(self, *parts):
if not parts:
raise TypeError("At least one path part is require (none given)")
if any(isinstance(path, RemotePath) for path in parts):
raise TypeError("LocalPath cannot be constructed from %r" % (parts,))
self._path = os.path.normpath(os.path.join(*(str(p) for p in parts)))
def __new__(cls, *parts):
if len(parts) == 1 and isinstance(parts[0], cls):
return parts[0]
return object.__new__(cls)
def __str__(self):
return self._path
def _get_info(self):
return self._path
def __getstate__(self):
return {"_path" : self._path}
def _form(self, *parts):
return LocalPath(*parts)
@property
@_setdoc(Path)
def basename(self):
return os.path.basename(str(self))
@property
@_setdoc(Path)
def dirname(self):
return LocalPath(os.path.dirname(str(self)))
@property
@_setdoc(Path)
def uid(self):
uid = self.stat().st_uid
name = getpwuid(uid)[0]
return FSUser(uid, name)
@property
@_setdoc(Path)
def gid(self):
gid = self.stat().st_gid
name = getgrgid(gid)[0]
return FSUser(gid, name)
@_setdoc(Path)
def join(self, *others):
return LocalPath(self, *others)
@_setdoc(Path)
def list(self):
return [self / fn for fn in os.listdir(str(self))]
@_setdoc(Path)
def isdir(self):
return os.path.isdir(str(self))
@_setdoc(Path)
def isfile(self):
return os.path.isfile(str(self))
@_setdoc(Path)
def islink(self):
return os.path.islink(str(self))
@_setdoc(Path)
def exists(self):
return os.path.exists(str(self))
@_setdoc(Path)
def stat(self):
return os.stat(str(self))
@_setdoc(Path)
def glob(self, pattern):
return [LocalPath(fn) for fn in glob.glob(str(self / pattern))]
@_setdoc(Path)
def delete(self):
if not self.exists():
return
if self.isdir():
shutil.rmtree(str(self))
else:
try:
os.remove(str(self))
except OSError:
# file might already been removed (a race with other threads/processes)
_, ex, _ = sys.exc_info()
if ex.errno != errno.ENOENT:
raise
@_setdoc(Path)
def move(self, dst):
if isinstance(dst, RemotePath):
raise TypeError("Cannot move local path %s to %r" % (self, dst))
shutil.move(str(self), str(dst))
return LocalPath(dst)
@_setdoc(Path)
def copy(self, dst, override = False):
if isinstance(dst, RemotePath):
raise TypeError("Cannot copy local path %s to %r" % (self, dst))
dst = LocalPath(dst)
if override:
dst.delete()
if self.isdir():
shutil.copytree(str(self), str(dst))
else:
shutil.copy2(str(self), str(dst))
return dst
@_setdoc(Path)
def mkdir(self):
if not self.exists():
try:
os.makedirs(str(self))
except OSError:
# directory might already exist (a race with other threads/processes)
_, ex, _ = sys.exc_info()
if ex.errno != errno.EEXIST:
raise
@_setdoc(Path)
def open(self, mode = "rb"):
return open(str(self), mode)
@_setdoc(Path)
def read(self):
with self.open() as f:
return f.read()
@_setdoc(Path)
def write(self, data):
with self.open("wb") as f:
f.write(data)
@_setdoc(Path)
def chown(self, owner = None, group = None, recursive = None):
if not hasattr(os, "chown"):
raise OSError("os.chown() not supported")
uid = self.uid if owner is None else (owner if isinstance(owner, int) else getpwnam(owner)[2])
gid = self.gid if group is None else (group if isinstance(group, int) else getgrnam(group)[2])
os.chown(str(self), uid, gid)
if recursive or (recursive is None and self.isdir()):
for subpath in self.walk():
os.chown(str(subpath), uid, gid)
@_setdoc(Path)
def chmod(self, mode):
if not hasattr(os, "chmod"):
raise OSError("os.chmod() not supported")
os.chmod(str(self), mode)
@_setdoc(Path)
def access(self, mode = 0):
return os.access(str(self), self._access_mode_to_flags(mode))
@_setdoc(Path)
def link(self, dst):
if isinstance(dst, RemotePath):
raise TypeError("Cannot create a hardlink from local path %s to %r" % (self, dst))
if hasattr(os, "link"):
os.link(str(self), str(dst))
else:
from plumbum.machines.local import local
# windows: use mklink
if self.isdir():
local["cmd"]("/C", "mklink", "/D", "/H", str(dst), str(self))
else:
local["cmd"]("/C", "mklink", "/H", str(dst), str(self))
@_setdoc(Path)
def symlink(self, dst):
if isinstance(dst, RemotePath):
raise TypeError("Cannot create a symlink from local path %s to %r" % (self, dst))
if hasattr(os, "symlink"):
os.symlink(str(self), str(dst))
else:
from plumbum.machines.local import local
# windows: use mklink
if self.isdir():
local["cmd"]("/C", "mklink", "/D", str(dst), str(self))
else:
local["cmd"]("/C", "mklink", str(dst), str(self))
@_setdoc(Path)
def unlink(self):
try:
os.unlink(str(self))
except OSError:
# file might already been removed (a race with other threads/processes)
_, ex, _ = sys.exc_info()
if ex.errno != errno.ENOENT:
raise
class LocalWorkdir(LocalPath):
"""Working directory manipulator"""
__slots__ = []
def __init__(self):
LocalPath.__init__(self, os.getcwd())
def __hash__(self):
raise TypeError("unhashable type")
def __new__(cls):
return object.__new__(cls)
def chdir(self, newdir):
"""Changes the current working directory to the given one
:param newdir: The destination director (a string or a ``LocalPath``)
"""
if isinstance(newdir, RemotePath):
raise TypeError("newdir cannot be %r" % (newdir,))
logger.debug("Chdir to %s", newdir)
os.chdir(str(newdir))
self._path = os.path.normpath(os.getcwd())
def getpath(self):
"""Returns the current working directory as a ``LocalPath`` object"""
return LocalPath(self._path)
@contextmanager
def __call__(self, newdir):
"""A context manager used to ``chdir`` into a directory and then ``chdir`` back to
the previous location; much like ``pushd``/``popd``.
:param newdir: The destination director (a string or a ``LocalPath``)
"""
prev = self._path
self.chdir(newdir)
try:
yield
finally:
self.chdir(prev)
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