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# Copyright 2017 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.
#
# Shell scripting helpers (created for Telemetry dependency roll scripts).
import os as _os
import shutil as _shutil
import subprocess as _subprocess
import tempfile as _tempfile
from contextlib import contextmanager as _contextmanager
@_contextmanager
def ScopedChangeDir(new_path):
old_path = _os.getcwd()
_os.chdir(new_path)
print '> cd', _os.getcwd()
try:
yield
finally:
_os.chdir(old_path)
print '> cd', old_path
@_contextmanager
def ScopedTempDir():
temp_dir = _tempfile.mkdtemp()
try:
with ScopedChangeDir(temp_dir):
yield
finally:
_shutil.rmtree(temp_dir)
def CallProgram(path_parts, *args, **kwargs):
'''Call an executable os.path.join(*path_parts) with the arguments specified
by *args. Any keyword arguments are passed as environment variables.'''
args = [_os.path.join(*path_parts)] + list(args)
env = dict(_os.environ)
env.update(kwargs)
print '>', ' '.join(args)
_subprocess.check_call(args, env=env)
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