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#!/usr/bin/python
# Copyright (c) 2012 The Native Client Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Classes to create working directories of various sorts."""
import logging
import os
import shutil
import tempfile
class FixedWorkingDirectory(object):
"""Working directory manager to be used with 'with'.
The context manager does not clean the directory on entry or exit.
Example uses:
with WorkingDirectory('mydir', clobber=True) as work_dir:
...do stuff in work_dir...
"""
def __init__(self, work_dir=None, clobber=False):
""" Constructor.
Args:
work_dir: A selected working directory.
"""
self._work_dir = os.path.abspath(work_dir)
self._clobber = clobber
def __enter__(self):
if self._clobber and os.path.exists(self._work_dir):
logging.debug('Removing %s...' % self._work_dir)
shutil.rmtree(self._work_dir)
if not os.path.exists(self._work_dir):
logging.debug('Creating %s...' % self._work_dir)
os.mkdir(self._work_dir)
return self._work_dir
def __exit__(self, _type, _value, _trackback):
pass
class TemporaryWorkingDirectory(object):
"""Working directory manager to be used with 'with'.
The manager creates a temporary working directory and cleans it
up at the end.
Example uses:
with TemporaryWorkingDirectory() as work_dir:
...do stuff in work_dir...
"""
def __enter__(self):
self._work_dir = tempfile.mkdtemp(prefix='workdir', suffix='.tmp')
return self._work_dir
def __exit__(self, _type, _value, _trackback):
shutil.rmtree(self._work_dir)
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