build/android/pylib/device/device_list.py

   1 # Copyright 2014 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 module to keep track of devices across builds."""
   6
   7 import os
   8
   9 LAST_DEVICES_FILENAME = '.last_devices'
  10 LAST_MISSING_DEVICES_FILENAME = '.last_missing'
  11
  12
  13 def GetPersistentDeviceList(file_name):
  14   """Returns a list of devices.
  15
  16   Args:
  17     file_name: the file name containing a list of devices.
  18
  19   Returns: List of device serial numbers that were on the bot.
  20   """
  21   with open(file_name) as f:
  22     return f.read().splitlines()
  23
  24
  25 def WritePersistentDeviceList(file_name, device_list):
  26   path = os.path.dirname(file_name)
  27   if not os.path.exists(path):
  28     os.makedirs(path)
  29   with open(file_name, 'w') as f:
  30     f.write('\n'.join(set(device_list)))