Summary:
When the user checks out a new commit (either by updating to it, by
creating a new commit, or by amending or rebasing the current commit), create a
unique identifier for that checkout.
Log this identifier at the start and end of command processing, and allow other
tools to also query and log the identifier.
This allows both Mercurial commands and other commands that log the identifier
to be correlated with a particular checkout.
Reviewed By: quark-zju
Differential Revision: D14648523
fbshipit-source-id: 2fad79c3010f5fad1a0e180e3d3d6d9c0a7f8e85
Summary:
The undo tests use timing to detect when the lock is being taken. This is
flaky. Instead add extra logging to detect when the lock is taken.
Reviewed By: quark-zju
Differential Revision: D13504643
fbshipit-source-id: 07b80e416047d11b4ba3e1631c2385e5f12fa36f
