resolveRef should be available through a mix-in

[binki]

js-git/mixins/walkers.js

Line 100 in bc266d7

function resolveRef(repo, hashish, callback) {

To do something, I have to basically copy this entire function into my own code. It would be useful if this were available through a mix-in.

[binki]

Hi, in fact I need more than resolveRef(). I need something to also expand intermediate refs so that I can expand, for example, HEAD which resolves to a ref. For example, this is what I am using now:

function resolveRef(repo, ref) {
  // Shouldn’t js-git also expose some helper for this?
  if (/^[0-9a-f]{40}$/.test(ref)) {
    return ref;
  }
  const refRefMatch = /^ref: *(.*)$/.exec(ref);
  if (refRefMatch) {
    return resolveRef(repo, refRefMatch[1]);
  }
  return new Promise((resolve, reject) => repo.readRef(ref, (ex, ref) => ex ? reject(ex) : resolve(ref))).then(ref => {
    if (!ref) {
      // Indicates that the ref could not be resolved to a hash.
      return null;
    }
    return resolveRef(repo, ref);
  });
}

function resolveRefOrFail(repo, ref) {
  return resolveRef(repo, resolvedRef => {
    if (!resolvedRef) {
      throw new Error(`Unable to resolve ref ${ref}`);
    }
    return resolvedRef;
  });
}

[TheKnarf]

Feel free to send a pull-request.