index.js

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

var path = require('path');
var SilentError = require('silent-error');
var writeFile = require('broccoli-file-creator');
var MergeTrees = require('broccoli-merge-trees');

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

  included: function(app) {
    this._super.included.apply(this, arguments);

    var VersionChecker = require('ember-cli-version-checker');
    var checker = new VersionChecker(this);

    // specifically *not* trying to use `checker.forEmber` because
    // we actually want to see if this is from npm for specific versions
    var emberSourceDep = checker.for('ember-source', 'npm');
    var emberCLIDep = checker.for('ember-cli', 'npm');

    var emberSourceIncludesLegacyShims = emberSourceDep.gt('2.11.0-alpha.0') && emberSourceDep.lt('2.11.0-beta.5');
    var emberCLISupportsOverridingShims = emberCLIDep.gt('2.11.0-alpha.0');

    if (!emberCLISupportsOverridingShims) {
      throw new SilentError('To consume ember-cli-shims from npm you must be using ember-cli@2.11.0-beta.1 or greater.  Please update ember-cli to a newer version or remove ember-cli-shims from `package.json`.');
    }

    var projectBowerDeps = this.project.bowerDependencies();
    if (projectBowerDeps['ember-cli-shims']) {
      throw new SilentError('Using ember-cli-shims as both a bower dependency and an npm dependency is not supported. Please remove `ember-cli-shims` from `bower.json`.');
    }

    // ember-source@2.11.0-alpha and 2.11.0-beta series releases included
    // their own legacy shims system, so this import is not needed with
    // those ember-source versions
    if (!emberSourceIncludesLegacyShims && emberCLISupportsOverridingShims) {
      if (this.import) {
        this.import('vendor/ember-cli-shims/deprecations.js');
        this.import('vendor/ember-cli-shims/app-shims.js');
      } else {
        app.import('vendor/ember-cli-shims/deprecations.js');
        app.import('vendor/ember-cli-shims/app-shims.js');
      }
    }

  },

  treeForVendor(vendorTree) {
    var deprecations = require('./deprecations');
    var rfc176Tree = writeFile('ember-cli-shims/deprecations.js', wrapJson('ember-cli-shims/deprecations', deprecations));

    return new MergeTrees([vendorTree, rfc176Tree]);
  },
};

function wrapJson(name, json) {
  return `(function() {
  define('${name}', [], function() {
    var values = ${JSON.stringify(json)};
    
    Object.defineProperty(values, '__esModule', {
      value: true
    });

    return values;
  });
})();`
}