Similar to the `Fetcher` sans-IO approach, an `Announcer` sans-IO approach is
introduced. The previous `Handler::announce` was already quite close to using a
sans-IO approach, but using internally held state. This change makes the
business logic more reusable – and testable.
Similarly to the `Fetcher`, the `Announcer` is configured and then driven by
telling it when nodes have been synchronized with. It will continuously check if
it has reached its target, yielding to the caller to decide whether to keep
going. In contrast, it also provides a way to mark the process as timed out,
since announcing relies on waiting for events to come back in a timely manner.
As a delegate, you shouldn't be able to delete your default branch.
This would most likely happen by mistake, and it prevents the canonical
head from being calculated correctly.
This adds the ability to the git-remote-helper to open and update
patches via a `git push` to the magic ref `refs/patches` and
`refs/heads/patches/<patch-id>`.
The main change is that we had to move away from offering the `connect`
capability in the remote helper, to offering `push` and `fetch`
individually.
To get a feel for how this works, see the `rad-patch-via-push.md`
example.
Fintan Halpenny
cloudhead
Alexis Sellier