rabbit_feature_flags: Restart registry regen if it changed meanwhile

Before we query all the details needed to generate a new registry, we
save the version of the currently loaded one, using the `vsn` Erlang
module attribute added by the compiler.

When the new registry is ready to be loaded, we verify again the version
of the loaded one: if it differs, it means a concurrent process reloaded
the registry. In this case, we restart the entire regen procedure,
including the query of fresh details. The goal is to avoid any loss of
information from the existing registry.

0 files changed, 0 insertions, 0 deletions