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# Copyright 2016 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import contextlib
import os
import sys
DIR_SOURCE_ROOT = os.environ.get(
'CHECKOUT_SOURCE_ROOT',
os.path.abspath(os.path.join(os.path.dirname(__file__),
os.pardir, os.pardir, os.pardir, os.pardir)))
BUILD_COMMON_PATH = os.path.join(
DIR_SOURCE_ROOT, 'build', 'util', 'lib', 'common')
# third-party libraries
ANDROID_PLATFORM_DEVELOPMENT_SCRIPTS_PATH = os.path.join(
DIR_SOURCE_ROOT, 'third_party', 'android_platform', 'development',
'scripts')
DEVIL_PATH = os.path.join(
DIR_SOURCE_ROOT, 'third_party', 'catapult', 'devil')
PYMOCK_PATH = os.path.join(
DIR_SOURCE_ROOT, 'third_party', 'pymock')
@contextlib.contextmanager
def SysPath(path, position=None):
if position is None:
sys.path.append(path)
else:
sys.path.insert(position, path)
try:
yield
finally:
if sys.path[-1] == path:
sys.path.pop()
else:
sys.path.remove(path)
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