[Android] Move some pylib modules into devil/

build/android/pylib/utils/device_temp_file.py

-# Copyright 2013 The Chromium Authors. All rights reserved.
+# Copyright 2015 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.
 
-"""A temp file that automatically gets pushed and deleted from a device."""
+# pylint: disable=unused-wildcard-import
+# pylint: disable=wildcard-import
 
-# pylint: disable=W0622
-
-import threading
-
-from pylib import cmd_helper
-from pylib.device import device_errors
-
-_COMMAND_TEMPLATE = (
-    # Make sure that the temp dir is writable
-    'test -d {dir} && '
-    # If 5 random attempts fail, something is up.
-    'for i in 1 2 3 4 5; do '
-    'fn={dir}/{prefix}-$(date +%s)-"$RANDOM"{suffix};'
-    'test -e "$fn" || break;'
-    'done && '
-    # Touch the file, so other temp files can't get the same name.
-    'touch "$fn" && echo -n "$fn"')
-
-class DeviceTempFile(object):
-  def __init__(self, adb, suffix='', prefix='temp_file', dir='/data/local/tmp'):
-    """Find an unused temporary file path in the devices external directory.
-
-    When this object is closed, the file will be deleted on the device.
-
-    Args:
-      adb: An instance of AdbWrapper
-      suffix: The suffix of the name of the temp file.
-      prefix: The prefix of the name of the temp file.
-      dir: The directory on the device where to place the temp file.
-    """
-    self._adb = adb
-    command = _COMMAND_TEMPLATE.format(
-        dir=cmd_helper.SingleQuote(dir),
-        suffix=cmd_helper.SingleQuote(suffix),
-        prefix=cmd_helper.SingleQuote(prefix))
-    self.name = self._adb.Shell(command)
-    self.name_quoted = cmd_helper.SingleQuote(self.name)
-
-  def close(self):
-    """Deletes the temporary file from the device."""
-    # ignore exception if the file is already gone.
-    def helper():
-      try:
-        self._adb.Shell('rm -f %s' % self.name_quoted, expect_status=None)
-      except device_errors.AdbCommandFailedError:
-        # file does not exist on Android version without 'rm -f' support (ICS)
-        pass
-
-    # It shouldn't matter when the temp file gets deleted, so do so
-    # asynchronously.
-    threading.Thread(target=helper).start()
-
-  def __enter__(self):
-    return self
-
-  def __exit__(self, type, value, traceback):
-    self.close()
+from devil.android.device_temp_file import *