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1 # Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 # Use of this source code is governed by a BSD-style license that can be |
3 # found in the LICENSE file. | 3 # found in the LICENSE file. |
4 | 4 |
5 """A module to keep track of devices across builds.""" | 5 """A module to keep track of devices across builds.""" |
6 | 6 |
| 7 import json |
7 import os | 8 import os |
8 | 9 |
9 LAST_DEVICES_FILENAME = '.last_devices' | 10 LAST_DEVICES_FILENAME = '.last_devices' |
10 LAST_MISSING_DEVICES_FILENAME = '.last_missing' | |
11 | 11 |
12 | 12 |
13 def GetPersistentDeviceList(file_name): | 13 def ReadDeviceOfflineCountMap(file_name): |
14 """Returns a list of devices. | 14 """Returns a dictionary of devices to the number of runs we have seen them |
| 15 offline. So 0 indicates that they were last seen online. |
15 | 16 |
16 Args: | 17 Args: |
17 file_name: the file name containing a list of devices. | 18 file_name: the file name containing a list of devices. |
18 | 19 |
19 Returns: List of device serial numbers that were on the bot. | 20 Returns: Dictionary mapping device ID to integer. |
20 """ | 21 """ |
21 with open(file_name) as f: | 22 with open(file_name) as f: |
22 return f.read().splitlines() | 23 contents = f.read() |
| 24 try: |
| 25 return json.loads(contents) |
| 26 except ValueError: # This might happen in old to new format transition. |
| 27 return [] |
23 | 28 |
24 | 29 |
25 def WritePersistentDeviceList(file_name, device_list): | 30 def WriteDeviceOfflineCountMap(file_name, device_map): |
26 path = os.path.dirname(file_name) | 31 path = os.path.dirname(file_name) |
27 if not os.path.exists(path): | 32 if not os.path.exists(path): |
28 os.makedirs(path) | 33 os.makedirs(path) |
29 with open(file_name, 'w') as f: | 34 with open(file_name, 'w') as f: |
30 f.write('\n'.join(set(device_list))) | 35 f.write(json.dumps(device_map)) |
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