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# coding: utf-8
#
# Copyright 2011 Yesudeep Mangalapilly <yesudeep@gmail.com>
# Copyright 2012 Google, Inc & contributors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
:module: tests.shell
:synopsis: Common shell operations for testing.
:author: yesudeep@google.com (Yesudeep Mangalapilly)
"""
import os
import os.path
import tempfile
import shutil
import errno
import time
# def tree(path='.', show_files=False):
# print(path)
# padding = ''
# for root, directories, filenames in os.walk(path):
# print(padding + os.path.basename(root) + os.path.sep)
# padding = padding + ' '
# for filename in filenames:
# print(padding + filename)
def cd(path):
os.chdir(path)
def pwd():
path = os.getcwd()
print(path)
return path
def mkdir(path, parents=False):
"""Creates a directory (optionally also creates all the parent directories
in the path)."""
if parents:
try:
os.makedirs(path)
except OSError as e:
if not e.errno == errno.EEXIST:
raise
else:
os.mkdir(path)
def rm(path, recursive=False):
"""Deletes files or directories."""
if os.path.isdir(path):
if recursive:
shutil.rmtree(path)
# else:
# os.rmdir(path)
else:
raise OSError(errno.EISDIR, os.strerror(errno.EISDIR), path)
else:
os.remove(path)
def touch(path, times=None):
"""Updates the modified timestamp of a file or directory."""
if os.path.isdir(path):
os.utime(path, times)
else:
with open(path, 'ab'):
os.utime(path, times)
def truncate(path):
"""Truncates a file."""
with open(path, 'wb'):
os.utime(path, None)
def mv(src_path, dest_path):
"""Moves files or directories."""
try:
os.rename(src_path, dest_path)
except OSError:
# this will happen on windows
os.remove(dest_path)
os.rename(src_path, dest_path)
def mkdtemp():
return tempfile.mkdtemp()
def ls(path='.'):
return os.listdir(path)
def msize(path):
"""Modify the file size without updating the modified time."""
with open(path, 'w') as w:
w.write('')
os.utime(path, (0, 0))
time.sleep(0.4)
with open(path, 'w') as w:
w.write('0')
os.utime(path, (0, 0))
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