ruff server no longer hangs after shutdown
#11222
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## Summary A follow-up to #11222. `ruff server` stalls during shutdown with Neovim because after it receives an exit notification and closes the I/O thread, it attempts to log a success message to `stderr`. Removing this log statement fixes this issue. ## Test Plan Track the instances of `ruff` in the OS task manager as you open and close Neovim. A new instance should appear when Neovim starts and it should disappear once Neovim is closed.
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Summary
Fixes #11207.
The server would hang after handling a shutdown request on
IoThreads::join()because a global sender (MESSENGER, used to sendwindow/showMessagenotifications) would remain allocated even after the event loop finished, which kept the writer I/O thread channel open.To fix this, I've made a few structural changes to
ruff server. I've wrapped the send/receive channels and thread join handle behind a new struct,Connection, which facilitates message sending and receiving, and also runsIoThreads::join()after the event loop finishes. To control the number of sender channels, theConnectionwraps the sender channel in anArcand only allows the creation of a wrapper type,ClientSender, which hold a weak reference to thisArcinstead of direct channel access. The wrapper type implements the channel methods directly to prevent access to the inner channel (which would allow the channel to be cloned). ClientSender's function is analogous toWeakSenderintokio. Additionally, the receiver channel cannot be accessed directly - theConnectiononly exposes an iterator over it.These changes will guarantee that all channels are closed before the I/O threads are joined.
Test Plan
Repeatedly open and close an editor utilizing
ruff serverwhile observing the task monitor. The net total amount of openruffinstances should be zero once all editor windows have closed.The following logs should also appear after the server is shut down:
This can be tested on VS Code by changing the settings and then checking
Output.