Convert Promise to async function

Input:

var promise = function() {
  return new Promise((resolve) => function() {
    setTimeout(resolve, 200, 4);
  });
};
var aF = function() {
  return new Promise(resolve => {
    promise.then((data) => {
      resolve(data);
    });
  });
}

Expected output:

let promise = () => new Promise((resolve) => function() {
    setTimeout(resolve, 200, 4);
  });
};

let aF = async () => {
  return await promise;
};

[nene]

@tunnckoCore Ah, I guess my comment was pretty ambiguous. My concern wasn’t about babylon, but about Recast supporting the things babylon supports.

[jedwards1211]

I’m pleased to announce a new codemod I developed for this. It’s still a bit of a work in progress, but it’s getting pretty baller. You may be interested in integrating it into lebab. (Although the README shows how to use it with jscodeshift, the transform is actually implemented with pure babel 7).

https://github.com/codemodsquad/asyncify

Right now if you want to see examples look in the tests. I’ll plan on making a try-it site in the next few days.