Example plugin to override index page

test_plugin.js

module.exports = {
  name() { return 'test_plugin' },
  open(context) { this.make = context.messageMaker('test_plugin').make },
  processMessage(message, queue) {
    if (message.type === 'sitespeedio.setup') {
      queue.postMessage(this.make('html.pug', {
        id: 'index',
        name: 'Overridden index',
        pug: "html\n body\n  h1 Hello!",
        type: 'summary',
      }));
    }
  }
};