Instead, create an empty worktree on guests when a worktree is first *registered*, then update it via an initial UpdateWorktree message.
This prevents the host from referencing a worktree in definition RPC responses that hasn't yet been observed by the guest. We could have waited until the entire worktree was shared, but this could take a long time, so instead we create an empty one on guests and proceed from there.
We still have randomized test failures as of this commit:
SEED=9519 MAX_PEERS=2 ITERATIONS=10000 OPERATIONS=7 ct -p zed-server test_random_collaboration
Co-Authored-By: Max Brunsfeld <maxbrunsfeld@gmail.com>
Co-Authored-By: Antonio Scandurra <me@as-cii.com>
We don't need this anymore because worktree updates are foreground
messages.
Co-Authored-By: Nathan Sobo <nathan@zed.dev>
Co-Authored-By: Max Brunsfeld <max@zed.dev>
Also, add completion requests to the randomized collaboration integration test,
to demonstrate that this is valid.
Co-Authored-By: Nathan Sobo <nathan@zed.dev>
Some types of messages, which entail state updates on the host, should be
processed in the order that they were sent. Other types of messages should
not block the processing of other messages.
Co-Authored-By: Antonio Scandurra <me@as-cii.com>
When handling this messages on the host, wait until the desired
version has been observed before performing the save.
Co-Authored-By: Nathan Sobo <nathan@zed.dev>
* On the server, spawn a separate task for each incoming message
* In the peer, eliminate the barrier that was used to enforce ordering
of responses with respect to other incoming messages
Co-Authored-By: Antonio Scandurra <me@as-cii.com>
This is required because, after joining, we want to be able to refer
to operations that have happened prior to joining, which are not
captured by the state. There is probably a way of reconstructing operations
from the state, but that seems unnecessary and we've already talked about
wanting to have the server store operations rather than state once we start
persisting worktrees.
Using a bounded channel may have blocked the collaboration server
from making progress handling RPC traffic.
There's no need to apply backpressure to calling code within the
same process - suspending a task that is attempting to call `send` has
an even greater memory cost than just buffering a protobuf message.
We do still want a bounded channel for incoming messages, so that
we provide backpressure to noisy peers - blocking their writes as opposed
to allowing them to buffer arbitrarily many messages in our server.
Co-Authored-By: Antonio Scandurra <me@as-cii.com>
Co-Authored-By: Nathan Sobo <nathan@zed.dev>
Sometimes we will have more than one worktree associated with the same
language server and in that case it's unclear which worktree id we should
report an event for.
We hold these locks for a short amount of time anyway, and using an
async lock could cause parallel sends to happen in an order different
than the order in which `send`/`request` was called.
Co-Authored-By: Nathan Sobo <nathan@zed.dev>
The main reason for this is that we need to include information about
a buffer's UndoMap into its protobuf representation. But it's a bit
complex to correctly incorporate this information into the current
protobuf representation.
If we want to continue reusing `Buffer::apply_remote_edit` for
incorporating the historical operations, we need to either make
that method capable of incorporating already-undone edits, or
serialize the UndoMap into undo *operations*, so that we can apply
these undo operations after the fact when deserializing. But this is
not trivial, because an UndoOperation requires information about
the full offset ranges that were undone.
In the case of the new Next.js app, the app will follow a redirect
from 'zed.dev/rpc' to the subdomain where the rust service is hosted.
Until then, the app will connect directly to zed.dev/rpc.
This will make it possible for us to render their avatars. Previously we only had the user ids. During rendering, everything needs to be available synchronously. So now, whenever collaborators are added, we perform the async I/O to fetch their user data prior to adding them to the worktree.
Again, this is about reserving the concept of a "collaborator" for actual collaborators on a worktree.
Co-Authored-By: Antonio Scandurra <me@as-cii.com>
This will allow us to use the word "collaborator" to describe users that are actively collaborating on a worktree.
Co-Authored-By: Antonio Scandurra <me@as-cii.com>
