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diff --git a/WebKitTools/Scripts/webkitpy/common/system/filesystem.py b/WebKitTools/Scripts/webkitpy/common/system/filesystem.py
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--- a/WebKitTools/Scripts/webkitpy/common/system/filesystem.py
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-# Copyright (C) 2010 Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-# * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-# * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-# * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Wrapper object for the file system / source tree."""
-
-from __future__ import with_statement
-
-import codecs
-import errno
-import os
-import tempfile
-
-
-class FileSystem(object):
- """FileSystem interface for webkitpy.
-
- Unless otherwise noted, all paths are allowed to be either absolute
- or relative."""
-
- def exists(self, path):
- """Return whether the path exists in the filesystem."""
- return os.path.exists(path)
-
- def isdir(self, path):
- """Return whether the path refers to a directory."""
- return os.path.isdir(path)
-
- def join(self, *comps):
- """Return the path formed by joining the components."""
- return os.path.join(*comps)
-
- def listdir(self, path):
- """Return the contents of the directory pointed to by path."""
- return os.listdir(path)
-
- def mkdtemp(self, **kwargs):
- """Create and return a uniquely named directory.
-
- This is like tempfile.mkdtemp, but if used in a with statement
- the directory will self-delete at the end of the block (if the
- directory is empty; non-empty directories raise errors). The
- directory can be safely deleted inside the block as well, if so
- desired."""
- class TemporaryDirectory(object):
- def __init__(self, **kwargs):
- self._kwargs = kwargs
- self._directory_path = None
-
- def __enter__(self):
- self._directory_path = tempfile.mkdtemp(**self._kwargs)
- return self._directory_path
-
- def __exit__(self, type, value, traceback):
- # Only self-delete if necessary.
-
- # FIXME: Should we delete non-empty directories?
- if os.path.exists(self._directory_path):
- os.rmdir(self._directory_path)
-
- return TemporaryDirectory(**kwargs)
-
- def maybe_make_directory(self, *path):
- """Create the specified directory if it doesn't already exist."""
- try:
- os.makedirs(os.path.join(*path))
- except OSError, e:
- if e.errno != errno.EEXIST:
- raise
-
- def read_binary_file(self, path):
- """Return the contents of the file at the given path as a byte string."""
- with file(path, 'rb') as f:
- return f.read()
-
- def read_text_file(self, path):
- """Return the contents of the file at the given path as a Unicode string.
-
- The file is read assuming it is a UTF-8 encoded file with no BOM."""
- with codecs.open(path, 'r', 'utf8') as f:
- return f.read()
-
- def write_binary_file(self, path, contents):
- """Write the contents to the file at the given location."""
- with file(path, 'wb') as f:
- f.write(contents)
-
- def write_text_file(self, path, contents):
- """Write the contents to the file at the given location.
-
- The file is written encoded as UTF-8 with no BOM."""
- with codecs.open(path, 'w', 'utf8') as f:
- f.write(contents)