llvm dev - Nov 2018 - RFC: Dealing with out of tree changes and the LLVM git monorepo

> All of these problems could be mitigated if we could preserve the history
> of the existing git mirrors when generating the monorepo. There are two
> ways to do this.
>
> 1. Start the monorepo by subtree-merging the various repos together at
>    an arbitrary point in time.
Why couldn't the subtree-merging approach work all the way to the beginning
of time?

--
Bryan