loopback-component-storage/lib/factory.js

/**
 * Create a client instance based on the options
 * @param options
 * @returns {*}
 */
function createClient(options) {
  options = options || {};
  var provider = options.provider || 'filesystem';
  var handler;

  try {
    // Try to load the provider from providers folder
    handler = require('./providers/' + provider);
  } catch (err) {
    // Fall back to pkgcloud
    handler = require('pkgcloud').storage;
  }

  return handler.createClient(options);
}

/**
 * Look up a provider by name
 * @param provider
 * @returns {*}
 */
function getProvider(provider) {
  try {
    // Try to load the provider from providers folder
    return require('./providers/' + provider);
  } catch (err) {
    // Fall back to pkgcloud
    return require('pkgcloud').providers[provider];
  }
}

module.exports.createClient = createClient;
module.exports.getProvider = getProvider;