Deploy projects 'atomically' to S3

A simple utility for deploying projects pseudo-atomically to Amazon S3. It is designed to first upload assets that have content hashes, and only then upload entry points assets like index.html.

Assets that are not entry points are also assigned a max-age header. If not entry points, files of type css, json, js and svg are compressed with gzip. For all gzipped assets, the necessary S3 object metadata is added to allow them to be served properly.

Install

npm install atomic-s3 -g

Usage

The usage examples assume that necessary AWS credentials are provided.

Passing options via command line

atomic-s3 --path=dist --bucket=my-bucket-name --region=eu-west-1

Passing options via configuration object

Create a file called atomic-s3.config.js.

module.exports = {
  path: 'dist',
  s3options: {
    params: {
      'Bucket': 'my-bucket-name'
    }
    region: 'eu-west-1'
  }
};

Then simply run

atomic-s3

Usage via Javascript

import atomicS3 from 'atomic-s3';

var opts = {
  path: 'dist'
  s3options: {
    params: {
      'Bucket': 'my-bucket-name'
    }
    region: 'eu-west-1'
  }
};

atomicS3.publish(opts, (err, res) => {
  if (err) {
    console.log(`Publish failed: ${err}`);
    return;
  }
  console.log('Project published.');
});

Options

Common options

• path: Local path to folder to publish.
• entryPoints: List of node glob patterns that together match all assets that are entry points, i.e. assets that do not have content hashes. Defaults to ['**/*.html'], which matches only html files.
• maxAge: Value to use for the max-age header applied for assets that are not entry points. Defaults to 3600.
• force: Disable cache.

Options only for command line API

• bucket: Name of Amazon S3 bucket in which to publish. Required.
• region: Amazon S3 region.
• verbose Enable verbose output.

Options only for config object

• path: Local path to folder to publish.
• s3options: [S3 options](<http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/S3.html#constructor-property). The most important options are region and params.Bucket. (See usage example.)

Test

Make sure you have the correct node version

nvm use

Then run tests with

npm test

Testing against real infrastructure

Make sure that necessary AWS credentials are in place for the bucket configured in test/atomic-s3.config.js and run the following in the project root:

node src/main-cli.js --config=test/atomic-s3.config.js --verbose