Class mod breaks on arrow function getInitialState

[iamricard]

Hi!

So I ran into an issue where running the mod when getInitialState is an arrow
function it breaks (code has been changed due to corporate IP...):

export default React.createClass({
  displayName: 'MyComponent',

  getInitialState: () => ({
    stateThingOne: 'beep',
    stateThingTwo: 'boop'
  }),

  // ...
})

The error message would be this:

TypeError: Cannot read property 'map' of undefined
    at inlineGetInitialState (class.js:294:12)
    at createConstructor (class.js:343:15)
    at createESClass (class.js:362:11)
    at updateToClass (class.js:477:7)
    at NodePath.<anonymous> (class.js:507:31)
    at __paths.forEach (/Users/ricard.sole/.nvm/versions/node/v6.2.2/lib/node_modules/jscodeshift/dist/Collection.js:71:36)
    at Array.forEach (native)
    at Collection.forEach (/Users/ricard.sole/.nvm/versions/node/v6.2.2/lib/node_modules/jscodeshift/dist/Collection.js:70:18)
    at apply (class.js:507:10)
    at module.exports (class.js:514:7)

[reergymerej]

Thanks for the info, @rcsole. Will you be able to submit a PR to fix it?

The scripts in this repository are provided in the hope that they are useful, but they are not officially maintained, and we generally will not fix community-reported issues.
https://github.com/reactjs/react-codemod#support-and-contributing

[keyz]

Thanks @reergymerej and @rcsole. Please notice that the class codemod will be replaced by #54 (comment) soon.

As @reergymerej mentioned, most of the codemods in this repo are used by Facebook internally -- we try to support the community's needs as much as possible but unfortunately we won't be able to cover every edge case. Internally at Facebook we don't have code like this; given that the level of robustness required for codemods (they are used internally across our entire front end code base), I guess we won't take a PR unless it has been intensively battle-tested. Thanks!

[cpojer]

Just to clear it up: we are happy to take all and any PRs on this repo as long as there are proper tests for it and the code is in a good shape :)