This does two major things:

• Passes ESLint
• Converts to using Flow

and one semi-major thing.

• Converts the app to use class properties.

So this would take these realllllllly weird bits of a constructor: this.func_name = this.func_name.bind(this) and turns them into normal functions using class instance fields. This comes in with React Native in the form of class-properties-transform. It means that you replace it with

func_name = () => {
  ...
}

whereas it used to be func_name(){ ... }. The => will rebind the this for you. Seems to work, at least a bunch of functions (like tabbing) seems to have not broken. Blog post on the topic.

TODO:

• Decide on what to do with ensuring RN / R are in the flow/typescript types database.

The decision here is that we would have to put a 5k file in that needs updating whenever react/react-native update.

As ever, I've been documenting all this stuff in the vscode.md file. You can read the version while this PR is open here: https://github.com/artsy/emission/blob/flow/docs/vscode.md