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538eccd4c6
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feat(appd): implement IPC server with Unix socket and MessagePack framing
Replaces the skeleton bail with a functional IPC server.
ipc.rs — transport layer:
- Request enum: LaunchApp, TerminateApp, QueryRunning, QueryAppState.
Serialized with serde MessagePack (rmp-serde, SCREAMING_SNAKE_CASE
type tag).
- Response enum: LaunchAck, AppReady, RunningApps, AppState, Error.
- AppStateKind: Starting, Running, Stopping, Stopped, NotFound.
- read_frame / write_frame: async 4-byte LE length-prefixed codec over
any AsyncRead / AsyncWrite.
main.rs — server:
- SessionRegistry: in-memory HashMap<session_id, AppStateKind> with
monotonic ID counter; launch / terminate / running_ids / state.
- run(): creates socket parent directory, removes stale socket, binds
UnixListener, sends sd_notify READY=1, then accept-loops with
ctrl-c / SIGTERM shutdown. Cleans up socket on exit.
- handle_connection(): splits stream into BufReader/BufWriter, reads
request frames, calls dispatch, writes response frames.
- dispatch(): maps Request variants to SessionRegistry operations;
returns typed Response. Wasmtime spawning and compositor client
deferred to later implementation.
New deps: serde (derive), rmp-serde, tokio net/io-util/sync/rt-multi-thread.
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2026-03-11 08:25:55 +01:00 |
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