example.js

let writeFile = require('broccoli-file-creator');


treeForPublic: function() {
  const publicTree = this._super.treeForPublic.apply(this, arguments);
  const trees = [];
  if (publicTree) {
    trees.push(publicTree);
  }
  trees.push(writeFile('the-settings-file.json', this.whateverTheSettingsAre());
  return mergeTrees(trees);
}