build-html-bundles.js

const peritextConfig = require( './app/src/peritextConfig.render' );
const buildBundler = require( './services/htmlBuildBundler' );

const buildBundle = ( { templateId, generatorId } ) => {
  return buildBundler( {
      templateId,
      generatorId,
    } )
};

/**
 * Resolve based on config
 */
if ( peritextConfig.htmlBuilds ) {
  Object.keys( peritextConfig.htmlBuilds )
    .reduce( ( cur, generatorId ) => {
      return cur.then( () => {
        return new Promise( ( resolve, reject ) => {
          const templates = peritextConfig.htmlBuilds[generatorId];
          Object.keys( templates )
            .reduce( ( cur2, templateId ) => {
                return cur2.then( () =>
                  buildBundle( { templateId, generatorId } )
                );
            }, Promise.resolve() )
            .then( resolve )
            .catch( reject );
        } );
      } );
    }, Promise.resolve() )
    .then(() => console.log('done'))
    .catch(console.log)
}