index.js

/* eslint-env node */
'use strict';

const Funnel = require('broccoli-funnel'),
      MergeTrees = require('broccoli-merge-trees'),
      path = require('path'),
      fastbootTransform = require('fastboot-transform');

module.exports = {
    name: 'ember-cli-webfontloader',

    treeForVendor(vendorTree) {
        let webfontloaderTree = fastbootTransform(new Funnel(path.join(this.project.root, 'node_modules', 'webfontloader'), {
          files: ['webfontloader.js']
        }));

        return new MergeTrees([vendorTree, webfontloaderTree]);
    },

    included() {
        this._super.included.apply(this, arguments);
        this._ensureThisImport();

        this.import('vendor/webfontloader.js');
        this.import('vendor/shims/webfontloader.js');
    },

    // ember 2.7 < compatibility:
    // https://github.com/simplabs/ember-simple-auth/blob/1ca4ae678b7be9905076762220dcd9fcb0f27ac0/index.js#L24-L39
    _ensureThisImport: function() {
        if (!this.import) {
            this._findHost = function findHostShim() {
              var current = this;
              var app;
              do {
                app = current.app || app;
              } while (current.parent.parent && (current = current.parent));
              return app;
            };
            this.import = function importShim(asset, options) {
              var app = this._findHost();
              app.import(asset, options);
            };
        }
    }
};