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"""
https://github.com/pjdelport/backports.tempfile/blob/master/src/backports/tempfile.py
Partial backport of Python 3.5's tempfile module:
TemporaryDirectory
Backport modifications are marked with marked with "XXX backport".
"""
from __future__ import absolute_import
import sys
import warnings as _warnings
from shutil import rmtree as _rmtree
from py2backports.weakref import finalize
# XXX backport: Rather than backporting all of mkdtemp(), we just create a
# thin wrapper implementing its Python 3.5 signature.
if sys.version_info < (3, 5):
from tempfile import mkdtemp as old_mkdtemp
def mkdtemp(suffix=None, prefix=None, dir=None):
"""
Wrap `tempfile.mkdtemp()` to make the suffix and prefix optional (like Python 3.5).
"""
kwargs = {k: v for (k, v) in
dict(suffix=suffix, prefix=prefix, dir=dir).items()
if v is not None}
return old_mkdtemp(**kwargs)
else:
from tempfile import mkdtemp
# XXX backport: ResourceWarning was added in Python 3.2.
# For earlier versions, fall back to RuntimeWarning instead.
_ResourceWarning = RuntimeWarning if sys.version_info < (3, 2) else ResourceWarning
class TemporaryDirectory(object):
"""Create and return a temporary directory. This has the same
behavior as mkdtemp but can be used as a context manager. For
example:
with TemporaryDirectory() as tmpdir:
...
Upon exiting the context, the directory and everything contained
in it are removed.
"""
def __init__(self, suffix=None, prefix=None, dir=None):
self.name = mkdtemp(suffix, prefix, dir)
self._finalizer = finalize(
self, self._cleanup, self.name,
warn_message="Implicitly cleaning up {!r}".format(self))
@classmethod
def _cleanup(cls, name, warn_message):
_rmtree(name)
_warnings.warn(warn_message, _ResourceWarning)
def __repr__(self):
return "<{} {!r}>".format(self.__class__.__name__, self.name)
def __enter__(self):
return self.name
def __exit__(self, exc, value, tb):
self.cleanup()
def cleanup(self):
if self._finalizer.detach():
_rmtree(self.name)
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