Async babel compiler for babel ESM config support

[vjpr]

Issue description or question

When using wallaby.compilers.babel, I am using an ESM package as a plugin.

I get this message:

Error: /xxx/babel.config.js: Error while loading config - You appear to be using a native ECMAScript module configuration file, which is only supported when running Babel asynchronously.
    ...
    at Object.transform (/Users/Vaughan/dev-mono/thirtyfive/node_modules/.pnpm/@babel+core@7.15.5_supports-color@9.0.1/node_modules/@babel/core/lib/transform.js:34:54)
    at e.run (/Users/Vaughan/Library/Application Support/JetBrains/IntelliJIdeaVaughan/system/wallaby/wallaby/server.js:14:23365)

wallaby

var t=n.transform(e.content,this._opts)

babel

const transform = function transform(code, opts, callback) {
  if (typeof opts === "function") {
    callback = opts;
    opts = undefined;
  }

  if (callback === undefined) return transformRunner.sync(code, opts);
  transformRunner.errback(code, opts, callback);
};

Should use https://babeljs.io/docs/en/babel-core#transformasync

[NikGovorov]

Hi @vjpr,

We've added the new setting called asyncTransform which forces our built-in babel compiler to use transformAsync:

export default function(wallaby) {
  return {
    files: [
      'package.json',
      'src/**/*.js',
      '!src/**/*.spec.js'
    ],
    tests: [
      'src/**/*.esmodules.spec.js'
    ],
    compilers: {
      '**/*.js': wallaby.compilers.babel({asyncTransform: true})
    },
    env: {
      type: 'node',
      runner: 'node',
      params: {
        runner: '--experimental-vm-modules'
      }
    },
    testFramework: 'ava'
  };
};

Please update to the the latest core version.