message: Expose SHA-1s via HasteFS
diff: @@ -29,6 +29,10 @@ export default class HasteFS {
  return (this._files[file] && this._files[file][H.DEPENDENCIES]) || null;
  }
  + getSha1(file: Path): ?string {
  + return (this._files[file] && this._files[file][H.SHA1]) || null;
  + }
  +
  exists(file: Path): boolean {
  return !!this._files[file];
  }
  