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build/android/pylib/device/adb_wrapper.py

Index: build/android/pylib/device/adb_wrapper.py
diff --git a/build/android/pylib/device/adb_wrapper.py b/build/android/pylib/device/adb_wrapper.py
new file mode 100644
index 0000000000000000000000000000000000000000..e8973260691c89d38f5e545650e00f136f81ce30
--- /dev/null
+++ b/build/android/pylib/device/adb_wrapper.py
@@ -0,0 +1,608 @@
+# Copyright 2013 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.
+
+"""This module wraps Android's adb tool.
+
+This is a thin wrapper around the adb interface. Any additional complexity
+should be delegated to a higher level (ex. DeviceUtils).
+"""
+
+import collections
+import errno
+import logging
+import os
+import re
+
+from pylib import cmd_helper
+from pylib import constants
+from pylib.device import decorators
+from pylib.device import device_errors
+from pylib.utils import timeout_retry
+
+
+_DEFAULT_TIMEOUT = 30
+_DEFAULT_RETRIES = 2
+
+_EMULATOR_RE = re.compile(r'^emulator-[0-9]+$')
+
+_READY_STATE = 'device'
+
+
+def _VerifyLocalFileExists(path):
+  """Verifies a local file exists.
+
+  Args:
+    path: Path to the local file.
+
+  Raises:
+    IOError: If the file doesn't exist.
+  """
+  if not os.path.exists(path):
+    raise IOError(errno.ENOENT, os.strerror(errno.ENOENT), path)
+
+
+DeviceStat = collections.namedtuple('DeviceStat',
+                                    ['st_mode', 'st_size', 'st_time'])
+
+
+class AdbWrapper(object):
+  """A wrapper around a local Android Debug Bridge executable."""
+
+  def __init__(self, device_serial):
+    """Initializes the AdbWrapper.
+
+    Args:
+      device_serial: The device serial number as a string.
+    """
+    if not device_serial:
+      raise ValueError('A device serial must be specified')
+    self._device_serial = str(device_serial)
+
+  # pylint: disable=unused-argument
+  @classmethod
+  def _BuildAdbCmd(cls, args, device_serial, cpu_affinity=None):
+    if cpu_affinity is not None:
+      cmd = ['taskset', '-c', str(cpu_affinity)]
+    else:
+      cmd = []
+    cmd.append(constants.GetAdbPath())
+    if device_serial is not None:
+      cmd.extend(['-s', device_serial])
+    cmd.extend(args)
+    return cmd
+  # pylint: enable=unused-argument
+
+  # pylint: disable=unused-argument
+  @classmethod
+  @decorators.WithTimeoutAndRetries
+  def _RunAdbCmd(cls, args, timeout=None, retries=None, device_serial=None,
+                 check_error=True, cpu_affinity=None):
+    status, output = cmd_helper.GetCmdStatusAndOutputWithTimeout(
+        cls._BuildAdbCmd(args, device_serial, cpu_affinity=cpu_affinity),
+        timeout_retry.CurrentTimeoutThread().GetRemainingTime())
+    if status != 0:
+      raise device_errors.AdbCommandFailedError(
+          args, output, status, device_serial)
+    # This catches some errors, including when the device drops offline;
+    # unfortunately adb is very inconsistent with error reporting so many
+    # command failures present differently.
+    if check_error and output.startswith('error:'):
+      raise device_errors.AdbCommandFailedError(args, output)
+    return output
+  # pylint: enable=unused-argument
+
+  def _RunDeviceAdbCmd(self, args, timeout, retries, check_error=True):
+    """Runs an adb command on the device associated with this object.
+
+    Args:
+      args: A list of arguments to adb.
+      timeout: Timeout in seconds.
+      retries: Number of retries.
+      check_error: Check that the command doesn't return an error message. This
+        does NOT check the exit status of shell commands.
+
+    Returns:
+      The output of the command.
+    """
+    return self._RunAdbCmd(args, timeout=timeout, retries=retries,
+                           device_serial=self._device_serial,
+                           check_error=check_error)
+
+  def _IterRunDeviceAdbCmd(self, args, timeout):
+    """Runs an adb command and returns an iterator over its output lines.
+
+    Args:
+      args: A list of arguments to adb.
+      timeout: Timeout in seconds.
+
+    Yields:
+      The output of the command line by line.
+    """
+    return cmd_helper.IterCmdOutputLines(
+      self._BuildAdbCmd(args, self._device_serial), timeout=timeout)
+
+  def __eq__(self, other):
+    """Consider instances equal if they refer to the same device.
+
+    Args:
+      other: The instance to compare equality with.
+
+    Returns:
+      True if the instances are considered equal, false otherwise.
+    """
+    return self._device_serial == str(other)
+
+  def __str__(self):
+    """The string representation of an instance.
+
+    Returns:
+      The device serial number as a string.
+    """
+    return self._device_serial
+
+  def __repr__(self):
+    return '%s(\'%s\')' % (self.__class__.__name__, self)
+
+  # pylint: disable=unused-argument
+  @classmethod
+  def IsServerOnline(cls):
+    status, output = cmd_helper.GetCmdStatusAndOutput(['pgrep', 'adb'])
+    output = [int(x) for x in output.split()]
+    logging.info('PIDs for adb found: %r', output)
+    return status == 0
+  # pylint: enable=unused-argument
+
+  @classmethod
+  def KillServer(cls, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
+    cls._RunAdbCmd(['kill-server'], timeout=timeout, retries=retries)
+
+  @classmethod
+  def StartServer(cls, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
+    # CPU affinity is used to reduce adb instability http://crbug.com/268450
+    cls._RunAdbCmd(['start-server'], timeout=timeout, retries=retries,
+                   cpu_affinity=0)
+
+  @classmethod
+  def GetDevices(cls, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
+    """DEPRECATED. Refer to Devices(...) below."""
+    # TODO(jbudorick): Remove this function once no more clients are using it.
+    return cls.Devices(timeout=timeout, retries=retries)
+
+  @classmethod
+  def Devices(cls, is_ready=True, timeout=_DEFAULT_TIMEOUT,
+              retries=_DEFAULT_RETRIES):
+    """Get the list of active attached devices.
+
+    Args:
+      is_ready: Whether the devices should be limited to only those that are
+        ready for use.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+
+    Yields:
+      AdbWrapper instances.
+    """
+    output = cls._RunAdbCmd(['devices'], timeout=timeout, retries=retries)
+    lines = (line.split() for line in output.splitlines())
+    return [AdbWrapper(line[0]) for line in lines
+            if len(line) == 2 and (not is_ready or line[1] == _READY_STATE)]
+
+  def GetDeviceSerial(self):
+    """Gets the device serial number associated with this object.
+
+    Returns:
+      Device serial number as a string.
+    """
+    return self._device_serial
+
+  def Push(self, local, remote, timeout=60*5, retries=_DEFAULT_RETRIES):
+    """Pushes a file from the host to the device.
+
+    Args:
+      local: Path on the host filesystem.
+      remote: Path on the device filesystem.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+    """
+    _VerifyLocalFileExists(local)
+    self._RunDeviceAdbCmd(['push', local, remote], timeout, retries)
+
+  def Pull(self, remote, local, timeout=60*5, retries=_DEFAULT_RETRIES):
+    """Pulls a file from the device to the host.
+
+    Args:
+      remote: Path on the device filesystem.
+      local: Path on the host filesystem.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+    """
+    cmd = ['pull', remote, local]
+    self._RunDeviceAdbCmd(cmd, timeout, retries)
+    try:
+      _VerifyLocalFileExists(local)
+    except IOError:
+      raise device_errors.AdbCommandFailedError(
+          cmd, 'File not found on host: %s' % local, device_serial=str(self))
+
+  def Shell(self, command, expect_status=0, timeout=_DEFAULT_TIMEOUT,
+            retries=_DEFAULT_RETRIES):
+    """Runs a shell command on the device.
+
+    Args:
+      command: A string with the shell command to run.
+      expect_status: (optional) Check that the command's exit status matches
+        this value. Default is 0. If set to None the test is skipped.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+
+    Returns:
+      The output of the shell command as a string.
+
+    Raises:
+      device_errors.AdbCommandFailedError: If the exit status doesn't match
+        |expect_status|.
+    """
+    if expect_status is None:
+      args = ['shell', command]
+    else:
+      args = ['shell', '%s; echo %%$?;' % command.rstrip()]
+    output = self._RunDeviceAdbCmd(args, timeout, retries, check_error=False)
+    if expect_status is not None:
+      output_end = output.rfind('%')
+      if output_end < 0:
+        # causes the status string to become empty and raise a ValueError
+        output_end = len(output)
+
+      try:
+        status = int(output[output_end+1:])
+      except ValueError:
+        logging.warning('exit status of shell command %r missing.', command)
+        raise device_errors.AdbShellCommandFailedError(
+            command, output, status=None, device_serial=self._device_serial)
+      output = output[:output_end]
+      if status != expect_status:
+        raise device_errors.AdbShellCommandFailedError(
+            command, output, status=status, device_serial=self._device_serial)
+    return output
+
+  def IterShell(self, command, timeout):
+    """Runs a shell command and returns an iterator over its output lines.
+
+    Args:
+      command: A string with the shell command to run.
+      timeout: Timeout in seconds.
+
+    Yields:
+      The output of the command line by line.
+    """
+    args = ['shell', command]
+    return cmd_helper.IterCmdOutputLines(
+      self._BuildAdbCmd(args, self._device_serial), timeout=timeout)
+
+  def Ls(self, path, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
+    """List the contents of a directory on the device.
+
+    Args:
+      path: Path on the device filesystem.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+
+    Returns:
+      A list of pairs (filename, stat) for each file found in the directory,
+      where the stat object has the properties: st_mode, st_size, and st_time.
+
+    Raises:
+      AdbCommandFailedError if |path| does not specify a valid and accessible
+          directory in the device.
+    """
+    def ParseLine(line):
+      cols = line.split(None, 3)
+      filename = cols.pop()
+      stat = DeviceStat(*[int(num, base=16) for num in cols])
+      return (filename, stat)
+
+    cmd = ['ls', path]
+    lines = self._RunDeviceAdbCmd(
+        cmd, timeout=timeout, retries=retries).splitlines()
+    if lines:
+      return [ParseLine(line) for line in lines]
+    else:
+      raise device_errors.AdbCommandFailedError(
+          cmd, 'path does not specify an accessible directory in the device',
+          device_serial=self._device_serial)
+
+  def Logcat(self, clear=False, dump=False, filter_specs=None,
+             logcat_format=None, ring_buffer=None, timeout=None,
+             retries=_DEFAULT_RETRIES):
+    """Get an iterable over the logcat output.
+
+    Args:
+      clear: If true, clear the logcat.
+      dump: If true, dump the current logcat contents.
+      filter_specs: If set, a list of specs to filter the logcat.
+      logcat_format: If set, the format in which the logcat should be output.
+        Options include "brief", "process", "tag", "thread", "raw", "time",
+        "threadtime", and "long"
+      ring_buffer: If set, a list of alternate ring buffers to request.
+        Options include "main", "system", "radio", "events", "crash" or "all".
+        The default is equivalent to ["main", "system", "crash"].
+      timeout: (optional) If set, timeout per try in seconds. If clear or dump
+        is set, defaults to _DEFAULT_TIMEOUT.
+      retries: (optional) If clear or dump is set, the number of retries to
+        attempt. Otherwise, does nothing.
+
+    Yields:
+      logcat output line by line.
+    """
+    cmd = ['logcat']
+    use_iter = True
+    if clear:
+      cmd.append('-c')
+      use_iter = False
+    if dump:
+      cmd.append('-d')
+      use_iter = False
+    if logcat_format:
+      cmd.extend(['-v', logcat_format])
+    if ring_buffer:
+      for buffer_name in ring_buffer:
+        cmd.extend(['-b', buffer_name])
+    if filter_specs:
+      cmd.extend(filter_specs)
+
+    if use_iter:
+      return self._IterRunDeviceAdbCmd(cmd, timeout)
+    else:
+      timeout = timeout if timeout is not None else _DEFAULT_TIMEOUT
+      return self._RunDeviceAdbCmd(cmd, timeout, retries).splitlines()
+
+  def Forward(self, local, remote, timeout=_DEFAULT_TIMEOUT,
+              retries=_DEFAULT_RETRIES):
+    """Forward socket connections from the local socket to the remote socket.
+
+    Sockets are specified by one of:
+      tcp:<port>
+      localabstract:<unix domain socket name>
+      localreserved:<unix domain socket name>
+      localfilesystem:<unix domain socket name>
+      dev:<character device name>
+      jdwp:<process pid> (remote only)
+
+    Args:
+      local: The host socket.
+      remote: The device socket.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+    """
+    self._RunDeviceAdbCmd(['forward', str(local), str(remote)], timeout,
+                          retries)
+
+  def JDWP(self, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
+    """List of PIDs of processes hosting a JDWP transport.
+
+    Args:
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+
+    Returns:
+      A list of PIDs as strings.
+    """
+    return [a.strip() for a in
+            self._RunDeviceAdbCmd(['jdwp'], timeout, retries).split('\n')]
+
+  def Install(self, apk_path, forward_lock=False, reinstall=False,
+              sd_card=False, timeout=60*2, retries=_DEFAULT_RETRIES):
+    """Install an apk on the device.
+
+    Args:
+      apk_path: Host path to the APK file.
+      forward_lock: (optional) If set forward-locks the app.
+      reinstall: (optional) If set reinstalls the app, keeping its data.
+      sd_card: (optional) If set installs on the SD card.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+    """
+    _VerifyLocalFileExists(apk_path)
+    cmd = ['install']
+    if forward_lock:
+      cmd.append('-l')
+    if reinstall:
+      cmd.append('-r')
+    if sd_card:
+      cmd.append('-s')
+    cmd.append(apk_path)
+    output = self._RunDeviceAdbCmd(cmd, timeout, retries)
+    if 'Success' not in output:
+      raise device_errors.AdbCommandFailedError(
+          cmd, output, device_serial=self._device_serial)
+
+  def InstallMultiple(self, apk_paths, forward_lock=False, reinstall=False,
+                      sd_card=False, allow_downgrade=False, partial=False,
+                      timeout=60*2, retries=_DEFAULT_RETRIES):
+    """Install an apk with splits on the device.
+
+    Args:
+      apk_paths: Host path to the APK file.
+      forward_lock: (optional) If set forward-locks the app.
+      reinstall: (optional) If set reinstalls the app, keeping its data.
+      sd_card: (optional) If set installs on the SD card.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+      allow_downgrade: (optional) Allow versionCode downgrade.
+      partial: (optional) Package ID if apk_paths doesn't include all .apks.
+    """
+    for path in apk_paths:
+      _VerifyLocalFileExists(path)
+    cmd = ['install-multiple']
+    if forward_lock:
+      cmd.append('-l')
+    if reinstall:
+      cmd.append('-r')
+    if sd_card:
+      cmd.append('-s')
+    if allow_downgrade:
+      cmd.append('-d')
+    if partial:
+      cmd.extend(('-p', partial))
+    cmd.extend(apk_paths)
+    output = self._RunDeviceAdbCmd(cmd, timeout, retries)
+    if 'Success' not in output:
+      raise device_errors.AdbCommandFailedError(
+          cmd, output, device_serial=self._device_serial)
+
+  def Uninstall(self, package, keep_data=False, timeout=_DEFAULT_TIMEOUT,
+                retries=_DEFAULT_RETRIES):
+    """Remove the app |package| from the device.
+
+    Args:
+      package: The package to uninstall.
+      keep_data: (optional) If set keep the data and cache directories.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+    """
+    cmd = ['uninstall']
+    if keep_data:
+      cmd.append('-k')
+    cmd.append(package)
+    output = self._RunDeviceAdbCmd(cmd, timeout, retries)
+    if 'Failure' in output:
+      raise device_errors.AdbCommandFailedError(
+          cmd, output, device_serial=self._device_serial)
+
+  def Backup(self, path, packages=None, apk=False, shared=False,
+             nosystem=True, include_all=False, timeout=_DEFAULT_TIMEOUT,
+             retries=_DEFAULT_RETRIES):
+    """Write an archive of the device's data to |path|.
+
+    Args:
+      path: Local path to store the backup file.
+      packages: List of to packages to be backed up.
+      apk: (optional) If set include the .apk files in the archive.
+      shared: (optional) If set buckup the device's SD card.
+      nosystem: (optional) If set exclude system applications.
+      include_all: (optional) If set back up all installed applications and
+        |packages| is optional.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+    """
+    cmd = ['backup', '-f', path]
+    if apk:
+      cmd.append('-apk')
+    if shared:
+      cmd.append('-shared')
+    if nosystem:
+      cmd.append('-nosystem')
+    if include_all:
+      cmd.append('-all')
+    if packages:
+      cmd.extend(packages)
+    assert bool(packages) ^ bool(include_all), (
+        'Provide \'packages\' or set \'include_all\' but not both.')
+    ret = self._RunDeviceAdbCmd(cmd, timeout, retries)
+    _VerifyLocalFileExists(path)
+    return ret
+
+  def Restore(self, path, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
+    """Restore device contents from the backup archive.
+
+    Args:
+      path: Host path to the backup archive.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+    """
+    _VerifyLocalFileExists(path)
+    self._RunDeviceAdbCmd(['restore'] + [path], timeout, retries)
+
+  def WaitForDevice(self, timeout=60*5, retries=_DEFAULT_RETRIES):
+    """Block until the device is online.
+
+    Args:
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+    """
+    self._RunDeviceAdbCmd(['wait-for-device'], timeout, retries)
+
+  def GetState(self, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
+    """Get device state.
+
+    Args:
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+
+    Returns:
+      One of 'offline', 'bootloader', or 'device'.
+    """
+    return self._RunDeviceAdbCmd(['get-state'], timeout, retries).strip()
+
+  def GetDevPath(self, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
+    """Gets the device path.
+
+    Args:
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+
+    Returns:
+      The device path (e.g. usb:3-4)
+    """
+    return self._RunDeviceAdbCmd(['get-devpath'], timeout, retries)
+
+  def Remount(self, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
+    """Remounts the /system partition on the device read-write."""
+    self._RunDeviceAdbCmd(['remount'], timeout, retries)
+
+  def Reboot(self, to_bootloader=False, timeout=60*5,
+             retries=_DEFAULT_RETRIES):
+    """Reboots the device.
+
+    Args:
+      to_bootloader: (optional) If set reboots to the bootloader.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+    """
+    if to_bootloader:
+      cmd = ['reboot-bootloader']
+    else:
+      cmd = ['reboot']
+    self._RunDeviceAdbCmd(cmd, timeout, retries)
+
+  def Root(self, timeout=_DEFAULT_TIMEOUT, retries=_DEFAULT_RETRIES):
+    """Restarts the adbd daemon with root permissions, if possible.
+
+    Args:
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+    """
+    output = self._RunDeviceAdbCmd(['root'], timeout, retries)
+    if 'cannot' in output:
+      raise device_errors.AdbCommandFailedError(
+          ['root'], output, device_serial=self._device_serial)
+
+  def Emu(self, cmd, timeout=_DEFAULT_TIMEOUT,
+               retries=_DEFAULT_RETRIES):
+    """Runs an emulator console command.
+
+    See http://developer.android.com/tools/devices/emulator.html#console
+
+    Args:
+      cmd: The command to run on the emulator console.
+      timeout: (optional) Timeout per try in seconds.
+      retries: (optional) Number of retries to attempt.
+
+    Returns:
+      The output of the emulator console command.
+    """
+    if isinstance(cmd, basestring):
+      cmd = [cmd]
+    return self._RunDeviceAdbCmd(['emu'] + cmd, timeout, retries)
+
+  @property
+  def is_emulator(self):
+    return _EMULATOR_RE.match(self._device_serial)
+
+  @property
+  def is_ready(self):
+    try:
+      return self.GetState() == _READY_STATE
+    except device_errors.CommandFailedError:
+      return False