Well bundle should be your last almost zero-config assets bundler for modern frontend development. It supports stylus for styles and babel through webpack.
npm install -g @konekto/bundle
Just launch the globally installed cli bundle and it will look for a .bundlerc file in your project tree.
Configure babel with your .babelrc and your good to go.
{
"cwd": "./src" , //parent folder of the sources
"destination": "./build" //destination folder, relative to working dir of bundle/index.js call
"sources": ["**/*.jsx", "**/*.styl"], //source glogs to compile relative to cwd,
"watch": true, //watch files,
"loader": true, //activate auto component loader
"sync": "http://localhost:8080", //page reload proxy with browsersync
"log": true //activate logging
}See bundle --help for equivalent counterparts cli arguments.