deploy-s3.js

const path = require('path');
const gulp = require('gulp');
const rename = require('gulp-rename');
const aws = require('gulp-awspublish');
const gutil = require('gulp-util');
const gulpIf = require('gulp-if');

const { getConfigFor } = require('./utils.js');

/*
 * Deploy compiled, minified and fingerprinted assets to Amazon
 * S3.
 */
function deployS3(config) {
  if (!config.credentials.accessKeyId || !config.credentials.secretAccessKey) {
    gutil.log(
      gutil.colors.red('AWS S3 credentials missing, skipping upload...'),
    );
    return;
  }

  // create a new publisher
  const publisher = aws.create(config.credentials);

  // define custom headers
  const headers = {
    'Cache-Control': 'max-age=315360000, no-transform, public',
  };
  return (
    gulp
      .src(config.assetsPath)
      .pipe(
        rename(function(filepath) {
          filepath.dirname = path.join(config.dirname, filepath.dirname);
        }),
      )
      // gzip, Set Content-Encoding headers and add .gz extension
      .pipe(gulpIf(file => !file.path.match(/\.(mp4|ogg|webm|avi|mov|mkv)$/), aws.gzip()))
      // publisher will add Content-Length, Content-Type and headers specified above
      // If not specified it will set x-amz-acl to public-read by default
      .pipe(publisher.publish(headers))
      // create a cache file to speed up consecutive uploads
      .pipe(publisher.cache())
      // print upload updates to console
      .pipe(aws.reporter())
  );
}

/**
 * Deploy tasks
 */
gulp.task('deploy-s3', () => deployS3(getConfigFor('s3')));