deployment.js

const DEPLOYERS = {
  sandbox: SanboxDeployer,
  iframe: IframeDeployer,
  hardcore: HardcoreDeployer
};

function getDeployer(deployment) {
  if (DEPLOYERS[deployment.method] == null) {
    throw new Error('Deployment method "' + deployment.method + '" does not exist.');
  }
  
  return DEPLOYERS[deployment.method];
}

deployments.forEach(function(d) {
  getDeployer(d).deploy(d);
});