This PR replaces the existing Python-driven sync server with a new one in Rust.
The new server supports both collection and media syncing, and is compatible
with both the new protocol mentioned below, and older clients. A setting has
been added to the preferences screen to point Anki to a local server, and a
similar setting is likely to come to AnkiMobile soon.
Documentation is available here: <https://docs.ankiweb.net/sync-server.html>
In addition to the new server and refactoring, this PR also makes changes to the
sync protocol. The existing sync protocol places payloads and metadata inside a
multipart POST body, which causes a few headaches:
- Legacy clients build the request in a non-deterministic order, meaning the
entire request needs to be scanned to extract the metadata.
- Reqwest's multipart API directly writes the multipart body, without exposing
the resulting stream to us, making it harder to track the progress of the
transfer. We've been relying on a patched version of reqwest for timeouts,
which is a pain to keep up to date.
To address these issues, the metadata is now sent in a HTTP header, with the
data payload sent directly in the body. Instead of the slower gzip, we now
use zstd. The old timeout handling code has been replaced with a new implementation
that wraps the request and response body streams to track progress, allowing us
to drop the git dependencies for reqwest, hyper-timeout and tokio-io-timeout.
The main other change to the protocol is that one-way syncs no longer need to
downgrade the collection to schema 11 prior to sending.
* Run cargo +nightly fmt
* Latest prost-build includes clippy workaround
* Tweak Rust protobuf imports
- Avoid use of stringify!(), as JetBrains editors get confused by it
- Stop merging all protobuf symbols into a single namespace
* Remove some unnecessary qualifications
Found via IntelliJ lint
* Migrate some asserts to assert_eq/ne
* Remove mention of node_modules exclusion
This no longer seems to be necessary after migrating away from Bazel,
and excluding it means TS/Svelte files can't be edited properly.
* Canonify import of i18n module
Should always be imported as `tr`, or `tr2` if there is a name collision
(Svelte).
* Add helper for garbage collecting ftl strings
Also add a serializer for ftl asts.
* Add helper for filter-mapping `DirEntry`s
* Fix `i18n_helpers/BUILD.bazel`
* run cargo-raze
* Refactor `garbage_collection.rs`
- Improve helper for file iterating
- Remove unused terms as well
- Fix issue with checking for nested messages by switching to a regex-
based approach (which runs before deleting)
- Some more refactorings and lint fixes
* Fix lints in `serialize.rs`
* Write json pretty and sorted
* Update `serialize.rs` and fix header
* Fix doc and remove `dbg!`
* Add binaries for ftl garbage collection
Also relax type constraints and strip debug tests.
* add rust_binary targets for i18n helpers (dae)
* add scripts to update desktop usage/garbage collect (dae)
Since we've already diverged from 2.1.49, we won't gain anything
from generating a stable json just yet. But once 2.1.50 is released,
we should run 'ftl/update-desktop-usage.sh stable'.
* add keys from AnkiMobile (dae)
* Mention caveats in `remove-unused.sh`
