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| 1 # Copyright 2013 The Chromium Authors. All rights reserved. | |
| 2 # Use of this source code is governed by a BSD-style license that can be | |
| 3 # found in the LICENSE file. | |
| 4 | |
| 5 """A temp file that automatically gets pushed and deleted from a device.""" | |
| 6 | |
| 7 # pylint: disable=W0622 | |
| 8 | |
| 9 import random | |
| 10 import time | |
| 11 | |
| 12 from pylib import cmd_helper | |
| 13 from pylib.device import device_errors | |
| 14 | |
| 15 | |
| 16 class DeviceTempFile(object): | |
| 17 def __init__(self, adb, suffix='', prefix='temp_file', dir='/data/local/tmp'): | |
| 18 """Find an unused temporary file path in the devices external directory. | |
| 19 | |
| 20 When this object is closed, the file will be deleted on the device. | |
| 21 | |
| 22 Args: | |
| 23 adb: An instance of AdbWrapper | |
| 24 suffix: The suffix of the name of the temp file. | |
| 25 prefix: The prefix of the name of the temp file. | |
| 26 dir: The directory on the device where to place the temp file. | |
| 27 """ | |
| 28 self._adb = adb | |
| 29 # make sure that the temp dir is writable | |
| 30 self._adb.Shell('test -d %s' % cmd_helper.SingleQuote(dir)) | |
| 31 while True: | |
| 32 self.name = '{dir}/{prefix}-{time:d}-{nonce:d}{suffix}'.format( | |
| 33 dir=dir, prefix=prefix, time=int(time.time()), | |
| 34 nonce=random.randint(0, 1000000), suffix=suffix) | |
| 35 self.name_quoted = cmd_helper.SingleQuote(self.name) | |
| 36 try: | |
| 37 self._adb.Shell('test -e %s' % self.name_quoted) | |
| 38 except device_errors.AdbCommandFailedError: | |
| 39 break # file does not exist | |
| 40 | |
| 41 # Immediately touch the file, so other temp files can't get the same name. | |
| 42 self._adb.Shell('touch %s' % self.name_quoted) | |
| 43 | |
| 44 def close(self): | |
| 45 """Deletes the temporary file from the device.""" | |
| 46 # ignore exception if the file is already gone. | |
| 47 try: | |
| 48 self._adb.Shell('rm -f %s' % self.name_quoted) | |
| 49 except device_errors.AdbCommandFailedError: | |
| 50 # file does not exist on Android version without 'rm -f' support (ICS) | |
| 51 pass | |
| 52 | |
| 53 def __enter__(self): | |
| 54 return self | |
| 55 | |
| 56 def __exit__(self, type, value, traceback): | |
| 57 self.close() | |
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Chromium Code Reviews
Issue 2392643003:
Removes files from //build that we don't need (Closed)
