Ignore option throwing errors

[larsgw]

Using the ignore option results in the following error:

TypeError: Cannot read property 'code' of null while parsing file: /home/larsw/project/node_modules/expect.js/index.js
    at babel.transform (/home/larsw/project/node_modules/babelify/index.js:31:25)
    at /home/larsw/project/node_modules/@babel/core/lib/transform.js:29:32
    at _combinedTickCallback (internal/process/next_tick.js:131:7)
    at process._tickCallback (internal/process/next_tick.js:180:9)

Using the following babelify options:

{
  global: true,
  ignore: ['node_modules/expect.js/']
}

Source (AFAICT)

Caused by this, due to result being null:

babelify/index.js

Line 31 in c5e4d40

var code = result.code;

This happens on ignored files, as expected. My guess is that that happens because of

    if (
      ignoreFile &&
      shouldIgnore(context, ignoreFile.ignore, null, ignoreFile.dirname)
    ) {
      return null;
    }

in @babel/core.

This causes

• loadPrivatePartialConfig to return null

  const configChain = buildRootChain(args, context);
  if (!configChain) return null;

  (source), which causes
• loadFullConfig to return null

  const result = loadPrivatePartialConfig(inputOpts);
  if (!result) {
    return null;
  }

  (source), which causes
• loadConfig to return null

  const config = loadFullConfig(opts);
  
  return config ? config.options : null;

  (source), which causes
• transform to return null

  cfg = loadConfig(opts);
  if (cfg === null) return cb(null, null);

  (source)

---

Program	Version
Babel	v7.0.0-beta.44
Babelify	v8.0.0 (plus the #255 PR)
Browserify	v16.2.0
Node.js	v8.11.2

Full options:

browserify()
  .exclude(['citation-js'])
  .add('./test/wrapper.js')
  .transform(babelify, {
    global: true,
    ignore: ['node_modules/expect.js/']
  })
  .bundle()
  .pipe(fs.createWriteStream(path.join(__dirname, '../build/test.citation.js')))

[loganfsmyth]

Fixed in #267