Summary: Linkrevs are on their way out. Let's switch to linknodes.
Reviewed By: quark-zju
Differential Revision: D23765176
fbshipit-source-id: 0dc1e0db11d732ce1edd24d863f32f08a5a5ce42
Summary: We don't really need the Rust workers for this, as we do not expect thousands of files to be changed during an in-memory merge.
Reviewed By: DurhamG
Differential Revision: D20495141
fbshipit-source-id: e72f8c4b01deee46ee72364dcd6716692c4103ab
Summary: Basic test to validate that updating files works as expected.
Reviewed By: DurhamG
Differential Revision: D20450123
fbshipit-source-id: 3ce09e1f72fe00052b86eec07668f3aa45824725