text: /**
   * Copyright 2016 Google Inc. All Rights Reserved.
   *
   * Licensed 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.
   */
  
  'use strict';
  var ErrorMessage = require('../classes/error-message.js');
  
  /**
   * The handler setup function serves to produce a bound instance of the
   * of a factory for ErrorMessage class instances with configuration-supplied
   * service contexts automatically set.
   * @function handlerSetup
   * @param {NormalizedConfigurationVariables} config - the environmental
   *  configuration
   * @returns {ErrorMessage} - a new ErrorMessage instance
   */
  function handlerSetup(config) {
    /**
     * The interface for creating new instances of the ErrorMessage class which
     * can be used to send custom payloads to the Error reporting service.
     * @returns {ErrorMessage} - returns a new instance of the ErrorMessage class
     */
    function newMessage() {
      // The API expects a reported error to contain a stack trace.
      // However, users do not need to provide a stack trace for ErrorMessage
      // objects built using the message builder.  Instead, here we store
      // the stack trace with the parts that reference the error-reporting's
      // internals removed.  Then when the error is reported, the stored
      // stack trace will be appended to the user's message for the error.
      //
      // Note: The stack trace at the point where the user constructed the
      //       error is used instead of the stack trace where the error is
      //       reported to be consistent with the behavior of reporting a
      //       an error when reporting an actual Node.js Error object.
      var fauxError = new Error('');
      var fullStack = fauxError.stack.split('\n');
      var cleanedStack = fullStack.slice(2).join('\n');
  
      var em = new ErrorMessage().setServiceContext(
                           config.getServiceContext().service,
                           config.getServiceContext().version);
      em._autoGeneratedStackTrace = cleanedStack;
      return em;
    }
  
    return newMessage;
  }
  
  module.exports = handlerSetup;
  