s3 sync

var s3 = require('s3');

//s3 client
var client = s3.createClient({
  maxAsyncS3: 20,     // this is the default
  s3RetryCount: 3,    // this is the default
  s3RetryDelay: 1000, // this is the default
  multipartUploadThreshold: 20971520, // this is the default (20 MB)
  multipartUploadSize: 15728640, // this is the default (15 MB)
  s3Options: {
    accessKeyId: "MY ID",
    secretAccessKey: "MY ACCESS KEY",
    endpoint : "some.endpoint.com.s3-website-ap-southeast-1.amazonaws.com",
    s3BucketEndpoint:true
    // any other options are passed to new AWS.S3()
    // See: http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/Config.html#constructor-property
  },
});




var assets = {
  localDir: "/var/www/html/website/assets",
  deleteRemoved: true, // default false, whether to remove s3 objects
                       // that have no corresponding local file.

  s3Params: {
    Bucket: "some.endpoint.com",
    Prefix: "/images/",
    // other options supported by putObject, except Body and ContentLength.
    // See: http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html#putObject-property
  },
};

var assets_uploader = client.uploadDir(assets);

assets_uploader.on('error', function(err) {
  console.error("unable to sync assets folder , error :", err.stack);
});


assets_uploader.on('progress', function(err) {
  console.log("Processing the data sync for the direcotry assets ." , assets_uploader.progressMd5Amount,assets_uploader.progressAmount,assets_uploader.progressTotal)
});

assets_uploader.on('end', function(err) {
  console.log("Done uploading the direcotry. assets !!!")
});