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#!/usr/bin/env python
import os
from fs.base import *
from fs.path import *
try:
import xattr
except ImportError:
xattr = None
class OSFS(FS):
"""Expose the underlying operating-system filesystem as an FS object.
This is the most basic of filesystems, which simply shadows the underlaying
filesytem of the OS. Most of its methods simply defer to the corresponding
methods in the os and os.path modules.
"""
def __init__(self, root_path, dir_mode=0700, thread_synchronize=True):
FS.__init__(self, thread_synchronize=thread_synchronize)
expanded_path = normpath(os.path.abspath(os.path.expanduser(os.path.expandvars(root_path))))
if not os.path.exists(expanded_path):
raise ResourceNotFoundError(expanded_path,msg="Root directory does not exist: %(path)s")
if not os.path.isdir(expanded_path):
raise ResourceInvalidError(expanded_path,msg="Root path is not a directory: %(path)s")
self.root_path = normpath(os.path.abspath(expanded_path))
self.dir_mode = dir_mode
def __str__(self):
return "<OSFS: %s>" % self.root_path
def getsyspath(self, path, allow_none=False):
sys_path = os.path.join(self.root_path, relpath(path)).replace('/', os.sep)
return sys_path
@convert_os_errors
def open(self, path, mode="r", **kwargs):
mode = filter(lambda c: c in "rwabt+",mode)
return open(self.getsyspath(path), mode, kwargs.get("buffering", -1))
@convert_os_errors
def exists(self, path):
path = self.getsyspath(path)
return os.path.exists(path)
@convert_os_errors
def isdir(self, path):
path = self.getsyspath(path)
return os.path.isdir(path)
@convert_os_errors
def isfile(self, path):
path = self.getsyspath(path)
return os.path.isfile(path)
@convert_os_errors
def listdir(self, path="./", wildcard=None, full=False, absolute=False, dirs_only=False, files_only=False):
paths = os.listdir(self.getsyspath(path))
return self._listdir_helper(path, paths, wildcard, full, absolute, dirs_only, files_only)
@convert_os_errors
def makedir(self, path, recursive=False, allow_recreate=False):
sys_path = self.getsyspath(path)
try:
if recursive:
os.makedirs(sys_path, self.dir_mode)
else:
os.mkdir(sys_path, self.dir_mode)
except OSError, e:
if e.errno == 17 or e.errno == 183:
if self.isfile(path):
raise ResourceInvalidError(path,msg="Cannot create directory, there's already a file of that name: %(path)s")
if not allow_recreate:
raise DestinationExistsError(path,msg="Can not create a directory that already exists (try allow_recreate=True): %(path)s")
elif e.errno == 2:
raise ParentDirectoryMissingError(path)
else:
raise
@convert_os_errors
def remove(self, path):
sys_path = self.getsyspath(path)
os.remove(sys_path)
@convert_os_errors
def removedir(self, path, recursive=False,force=False):
sys_path = self.getsyspath(path)
# Don't remove the root directory of this FS
if path in ("","/"):
return
if force:
for path2 in self.listdir(path,absolute=True,files_only=True):
self.remove(path2)
for path2 in self.listdir(path,absolute=True,dirs_only=True):
self.removedir(path2,force=True)
os.rmdir(sys_path)
# Using os.removedirs() for this can result in dirs being
# removed outside the root of this FS, so we recurse manually.
if recursive:
try:
self.removedir(dirname(path),recursive=True)
except DirectoryNotEmptyError:
pass
@convert_os_errors
def rename(self, src, dst):
if not issamedir(src, dst):
raise ValueError("Destination path must the same directory (use the move method for moving to a different directory)")
path_src = self.getsyspath(src)
path_dst = self.getsyspath(dst)
os.rename(path_src, path_dst)
@convert_os_errors
def getinfo(self, path):
sys_path = self.getsyspath(path)
stats = os.stat(sys_path)
info = dict((k, getattr(stats, k)) for k in dir(stats) if not k.startswith('__') )
info['size'] = info['st_size']
# TODO: this doesn't actually mean 'creation time' on unix
ct = info.get('st_ctime', None)
if ct is not None:
info['created_time'] = datetime.datetime.fromtimestamp(ct)
at = info.get('st_atime', None)
if at is not None:
info['accessed_time'] = datetime.datetime.fromtimestamp(at)
mt = info.get('st_mtime', None)
if mt is not None:
info['modified_time'] = datetime.datetime.fromtimestamp(at)
return info
@convert_os_errors
def getsize(self, path):
sys_path = self.getsyspath(path)
stats = os.stat(sys_path)
return stats.st_size
# Provide native xattr support if available
if xattr:
@convert_os_errors
def setxattr(self, path, key, value):
xattr.xattr(self.getsyspath(path))[key]=value
@convert_os_errors
def getxattr(self, path, key, default=None):
try:
return xattr.xattr(self.getsyspath(path)).get(key)
except KeyError:
return default
@convert_os_errors
def delxattr(self, path, key):
try:
del xattr.xattr(self.getsyspath(path))[key]
except KeyError:
pass
@convert_os_errors
def listxattrs(self, path):
return xattr.xattr(self.getsyspath(path)).keys()
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