text: /**
      Licensed to OffGrid Networks (OGN) under one
      or more contributor license agreements.  See the NOTICE file
      distributed with this work for additional information
      regarding copyright ownership.  OGN licenses this file
      to you under the Apache License, Version 2.0 (the
      "License"); you may not use this file except in compliance
      with the License.  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
      Unless required by applicable law or agreed to in writing,
      software distributed under the License is distributed on an
      "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
      KIND, either express or implied.  See the License for the
      specific language governing permissions and limitations
      under the License.
  */
  
  var Q = require('q');
  var os = require('os');
  var events = require('nodekit-cli-lib')['nodekit-common'].events;
  var spawn = require('nodekit-cli-lib')['nodekit-common'].superspawn.spawn;
  var NodeKitError = require('nodekit-cli-lib')['nodekit-common'].NodeKitError;
  
  var Adb = {};
  
  function isDevice(line) {
      return line.match(/\w+\tdevice/) && !line.match(/emulator/);
  }
  
  function isEmulator(line) {
      return line.match(/device/) && line.match(/emulator/);
  }
  
  /**
   * Lists available/connected devices and emulators
   *
   * @param   {Object}   opts            Various options
   * @param   {Boolean}  opts.emulators  Specifies whether this method returns
   *   emulators only
   *
   * @return  {Promise<String[]>}        list of available/connected
   *   devices/emulators
   */
  Adb.devices = function (opts) {
      return spawn('adb', ['devices'], {cwd: os.tmpdir()})
      .then(function(output) {
          return output.split('\n').filter(function (line) {
              // Filter out either real devices or emulators, depending on options
              return (line && opts && opts.emulators) ? isEmulator(line) : isDevice(line);
          }).map(function (line) {
              return line.replace(/\tdevice/, '').replace('\r', '');
          });
      });
  };
  
  Adb.install = function (target, packagePath, opts) {
      events.emit('verbose', 'Installing apk ' + packagePath + ' on target ' + target + '...');
      var args = ['-s', target, 'install'];
      if (opts && opts.replace) args.push('-r');
      return spawn('adb', args.concat(packagePath), {cwd: os.tmpdir()})
      .then(function(output) {
          // 'adb install' seems to always returns no error, even if installation fails
          // so we catching output to detect installation failure
          if (output.match(/Failure/)) {
              if (output.match(/INSTALL_PARSE_FAILED_NO_CERTIFICATES/)) {
                  output += '\n\n' + 'Sign the build using \'-- --keystore\' or \'--buildConfig\'' +
                      ' or sign and deploy the unsigned apk manually using Android tools.';
              } else if (output.match(/INSTALL_FAILED_VERSION_DOWNGRADE/)) {
                  output += '\n\n' + 'You\'re trying to install apk with a lower versionCode that is already installed.' +
                      '\nEither uninstall an app or increment the versionCode.';
              }
  
              return Q.reject(new NodeKitError('Failed to install apk to device: ' + output));
          }
      });
  };
  
  Adb.uninstall = function (target, packageId) {
      events.emit('verbose', 'Uninstalling package ' + packageId + ' from target ' + target + '...');
      return spawn('adb', ['-s', target, 'uninstall', packageId], {cwd: os.tmpdir()});
  };
  
  Adb.shell = function (target, shellCommand) {
      events.emit('verbose', 'Running adb shell command "' + shellCommand + '" on target ' + target + '...');
      var args = ['-s', target, 'shell'];
      shellCommand = shellCommand.split(/\s+/);
      return spawn('adb', args.concat(shellCommand), {cwd: os.tmpdir()})
      .catch(function (output) {
          return Q.reject(new NodeKitError('Failed to execute shell command "' +
              shellCommand + '"" on device: ' + output));
      });
  };
  
  Adb.start = function (target, activityName) {
      events.emit('verbose', 'Starting application "' + activityName + '" on target ' + target + '...');
      return Adb.shell(target, 'am start -W -a android.intent.action.MAIN -n' + activityName)
      .catch(function (output) {
          return Q.reject(new NodeKitError('Failed to start application "' +
              activityName + '"" on device: ' + output));
      });
  };
  
  module.exports = Adb;
  