es-client.js

// This is what elastic search wants for promises, bluebird says it's horrible
// https://www.elastic.co/guide/en/elasticsearch/client/javascript-api/current/configuration.html#config-defer
// http://bluebirdjs.com/docs/api/deferred-migration.html
function defer () {
  let resolve, reject
  var promise = new Promise(function makeDefer () {
    resolve = arguments[0]
    reject = arguments[1]
  })
  return {
    resolve,
    reject,
    promise
  }
}

let opts = {
  hosts: config.user.esHost,
  connectionClass: httpAwsEs,
  amazonES: awsConfig,
  defer
}

module.exports = new es.Client(opts)