Add android_stats.py script

scripts/android_stats.py

+#!/usr/bin/env python
+# Copyright (c) 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.
+
+
+"""Produce health statistics for all attached Android devices."""
+
+
+import json
+import re
+import shlex
+import subprocess
+
+
+def sanitize(string):
+  """Return a string which is safe for InfluxDB."""
+  return re.sub('\W+', '_', string.strip())
+
+
+def get_devices():
+  """Return a list of attached-and-ready Android devices."""
+  devices = []
+  for line in subprocess.check_output(['adb', 'devices']).splitlines()[1:]:
+    if not line:
+      continue
+    parts = shlex.split(line)
+    if len(parts) != 2:
+      continue
+    if parts[1] == 'device':
+      devices.append(parts[0])
+  return devices
+
+
+def get_device_model(serial):
+  """Return the model name for the given device."""
+  cmd = ['adb', '-s', serial, 'shell', 'getprop', 'ro.product.model']
+  return sanitize(subprocess.check_output(cmd))
+
+
+def get_battery_stats(serial):
+  """Obtain and return a dictionary of battery statistics for the device."""
+  cmd = ['adb', '-s', serial, 'shell', 'dumpsys', 'batteryproperties']

[rmistry, 2015/12/01 16:33:17]

I ran this on N5 and it said:
Can't find service: batteryproperties.

[borenet, 2015/12/01 20:00:07]

Yeah, the services are apparently different between OS versions.

[djsollen, 2015/12/02 15:46:03]

I think that batteryproperties should be available in 5.0 and beyond.

+  output = subprocess.check_output(cmd)
+  parts = re.findall('([a-zA-Z0-9\s]+): (\d+)\s*', output)
+  rv = {}
+  for k, v in parts:
+    rv[sanitize(k)] = int(v)
+  return rv
+
+
+def get_temperature(serial):
+  """Obtain and return the temperature of the device."""
+  temp_file = '/sys/devices/virtual/thermal/thermal_zone0/temp'

[rmistry, 2015/12/01 16:33:17]

What about the other zones?
On the N5 it is showing 0-16 zones.

[borenet, 2015/12/01 20:00:07]

Dunno.  I'm still hoping to find a better way to do this.

[djsollen, 2015/12/02 15:46:03]

You could loop through all the zones and print the type and temp of each and
return the max.

[borenet, 2015/12/02 15:59:26]

I think I'll leave as-is for now and update if/when we want
more/better/different data.

+  cmd = ['adb', '-s', serial, 'shell', 'cat', temp_file]
+  output = subprocess.check_output(cmd).strip()
+  try:
+    temp = float(output)
+  except Exception:
+    return -1
+  # Normalize the temperature, assuming it's 9 < t < 100 degrees C.
+  while temp > 100.0:
+    temp /= 10

[rmistry, 2015/12/01 16:33:17]

Why is this necessary? do some devices output 30C as 300C ?

[borenet, 2015/12/01 20:00:07]

Yes.  The two devices on my desk report 2780 and 31.

+  return temp
+
+
+def get_device_stats(serial):
+  """Obtain and return a dictionary of device statistics."""
+  return {
+    'battery': get_battery_stats(serial),
+    'model': get_device_model(serial),
+    'temperature': get_temperature(serial),
+  }
+
+
+def get_all_device_stats():
+  """Obtain and return statistics for all attached devices."""
+  devices = get_devices()
+  stats = {}
+  for device in devices:
+    stats[device] = get_device_stats(device)
+  return stats
+
+
+if __name__ == '__main__':
+  print json.dumps(get_all_device_stats(), sort_keys=True, indent=4)