[Telementry][Android] Only copy changed or missing files of profile

build/android/pylib/android_commands.py

 # Copyright (c) 2012 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.
 
 """Provides an interface to communicate with the device via the adb command.
 
 Assumes adb binary is currently on system path.
 """
 # pylint: disable-all
 
@@ skipping 1782 matching lines @@
     package = match.group(2)
     logging.warning('Trying to dismiss %s dialog for %s' % match.groups())
     self.SendKeyEvent(KEYCODE_DPAD_RIGHT)
     self.SendKeyEvent(KEYCODE_DPAD_RIGHT)
     self.SendKeyEvent(KEYCODE_ENTER)
     match = _FindFocusedWindow()
     if match:
       logging.error('Still showing a %s dialog for %s' % match.groups())
     return package
 
+  def EfficientDeviceDirectoryCopy(self, source, dest):
+    """ Copy a directory efficiently on the device
+
+    Uses a shell script running on the target to copy new and changed files the
+    source directory to the destination directory and remove added files. This
+    is in some cases much faster than cp -r.
+
+    Args:
+      source: absolute path of source directory
+      dest: absolute path of destination directory
+    """
+    logging.info('In EfficientDeviceDirectoryCopy %s %s', source, dest)
+    temp_script_file = self._GetDeviceTempFileName(
+        AndroidCommands._TEMP_SCRIPT_FILE_BASE_FMT)
+    host_script_path = os.path.join(constants.DIR_SOURCE_ROOT,
+                                    'build',
+                                    'android',
+                                    'pylib',
+                                    'efficient_android_directory_copy.sh')
+    self._adb.Push(host_script_path, temp_script_file)
+    self.EnableAdbRoot
+    out = self.RunShellCommand('sh %s %s %s' % (temp_script_file, source, dest),
+                               timeout_time=120)
+    if self._device:
+      device_repr = self._device[-4:]
+    else:
+      device_repr = '????'
+    for line in out:
+      logging.info('[%s]> %s', device_repr, line)
+    self.RunShellCommand('rm %s' % temp_script_file)
+
 
 class NewLineNormalizer(object):
   """A file-like object to normalize EOLs to '\n'.
 
   Pexpect runs adb within a pseudo-tty device (see
   http://www.noah.org/wiki/pexpect), so any '\n' printed by adb is written
   as '\r\n' to the logfile. Since adb already uses '\r\n' to terminate
   lines, the log ends up having '\r\r\n' at the end of each line. This
   filter replaces the above with a single '\n' in the data stream.
   """
   def __init__(self, output):
     self._output = output
 
   def write(self, data):
     data = data.replace('\r\r\n', '\n')
     self._output.write(data)
 
   def flush(self):
     self._output.flush()