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feat(tauri): add low-disk streamed install action

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NEXT_STEPS item 1 called out that streamed install was still CLI-only
because the Tauri app started the peer with no stream provider. Users can now
choose an explicit "Low disk install" action from the game detail modal for
remote-only games instead of taking the default archive-preserving download
path.

The GUI command queues a normal peer detail fetch first so the peer database
has the file metadata needed for source validation. A small pending handoff in
Tauri routes the resulting GotGameFiles event into StreamInstallGame instead
of DownloadGameFiles, and clears that pending state on no-peer or download
failure events. This keeps the existing download continuation untouched for
the default action.

The external unrar stream provider moved from the CLI harness into
lanspread-peer so CLI and Tauri use the same implementation. Tauri resolves
the bundled unrar sidecar path and injects that provider at peer startup;
falling back to the noop provider keeps peer startup alive if the sidecar
cannot be resolved, while the streamed install operation still fails safely.

Test Plan:
- just fmt
- just test
- just frontend-test
- just clippy
- just build
- git diff --check

Refs: NEXT_STEPS.md item 1
This commit is contained in:
ddidderr
2026-06-07 21:39:02 +02:00
parent 389511f620
commit 40697a73e5
13 changed files with 623 additions and 436 deletions
Download Patch File Download Diff File Expand all files Collapse all files
crates/lanspread-tauri-deno-ts/src-tauri/src/lib.rs
+122 -6
View File
@@ -14,11 +14,14 @@ use lanspread_db::db::{Availability, Game, GameCatalog, GameDB, GameFileDescript
use lanspread_peer::{
ActiveOperation,
ActiveOperationKind,
ExternalUnrarStreamProvider,
NoopStreamInstallProvider,
PeerCommand,
PeerEvent,
PeerGameDB,
PeerRuntimeHandle,
PeerStartOptions,
StreamInstallProvider,
UnpackFuture,
Unpacker,
migrate_legacy_state,
@@ -82,6 +85,7 @@ struct LanSpreadState {
peer_runtime: Arc<RwLock<Option<PeerRuntimeHandle>>>,
games: Arc<RwLock<GameDB>>,
active_operations: Arc<RwLock<HashMap<String, UiOperationKind>>>,
pending_stream_installs: Arc<RwLock<HashSet<String>>>,
games_folder: Arc<RwLock<String>>,
peer_game_db: Arc<RwLock<PeerGameDB>>,
catalog: Arc<RwLock<GameCatalog>>,
@@ -255,6 +259,16 @@ async fn install_game(
log::warn!("Game already has an active operation: {id}");
return Ok(false);
}
if state
.inner()
.pending_stream_installs
.read()
.await
.contains(&id)
{
log::warn!("Game already has a pending streamed install: {id}");
return Ok(false);
}
let peer_ctrl_arc = state.inner().peer_ctrl.clone();
let peer_ctrl = peer_ctrl_arc.read().await.clone();
@@ -294,6 +308,77 @@ async fn install_game(
Ok(handled)
}
#[tauri::command]
async fn stream_install_game(
id: String,
state: tauri::State<'_, LanSpreadState>,
) -> tauri::Result<bool> {
if state
.inner()
.active_operations
.read()
.await
.contains_key(&id)
{
log::warn!("Game already has an active operation: {id}");
return Ok(false);
}
if state
.inner()
.pending_stream_installs
.read()
.await
.contains(&id)
{
log::warn!("Game already has a pending streamed install: {id}");
return Ok(false);
}
let Some((downloaded, installed, peer_count)) = state
.inner()
.games
.read()
.await
.get_game_by_id(&id)
.map(|game| (game.downloaded, game.installed, game.peer_count))
else {
log::warn!("Ignoring streamed install request for unknown game: {id}");
return Ok(false);
};
if downloaded || installed || peer_count == 0 {
log::warn!(
"Ignoring streamed install request for {id}: downloaded={downloaded}, \
installed={installed}, peer_count={peer_count}"
);
return Ok(false);
}
let peer_ctrl_arc = state.inner().peer_ctrl.clone();
let peer_ctrl = peer_ctrl_arc.read().await.clone();
let Some(peer_ctrl) = peer_ctrl else {
log::warn!("Peer system not initialized yet");
return Ok(false);
};
{
let mut pending = state.inner().pending_stream_installs.write().await;
pending.insert(id.clone());
}
if let Err(e) = peer_ctrl.send(PeerCommand::GetGame(id.clone())) {
log::error!("Failed to send PeerCommand::GetGame for streamed install: {e:?}");
state
.inner()
.pending_stream_installs
.write()
.await
.remove(&id);
return Ok(false);
}
Ok(true)
}
#[tauri::command]
async fn update_game(
id: String,
@@ -1867,6 +1952,7 @@ async fn ensure_peer_started(app_handle: &AppHandle, games_folder: &Path) {
let unpacker = Arc::new(SidecarUnpacker {
app_handle: app_handle.clone(),
});
let stream_install_provider = stream_install_provider_for_app(app_handle);
match start_peer_with_options(
games_folder.to_path_buf(),
tx_peer_event,
@@ -1876,7 +1962,7 @@ async fn ensure_peer_started(app_handle: &AppHandle, games_folder: &Path) {
PeerStartOptions {
state_dir: Some(state_dir),
active_outbound_transfers: Some(state.active_outbound_transfers.clone()),
stream_install_provider: None,
stream_install_provider: Some(stream_install_provider),
},
) {
Ok(handle) => {
@@ -1894,6 +1980,22 @@ async fn ensure_peer_started(app_handle: &AppHandle, games_folder: &Path) {
}
}
fn stream_install_provider_for_app(app_handle: &AppHandle) -> Arc<dyn StreamInstallProvider> {
match resolve_unrar_sidecar_program(app_handle) {
Ok(program) => Arc::new(ExternalUnrarStreamProvider::new(program)),
Err(err) => {
log::error!("Failed to resolve streamed-install unrar sidecar: {err}");
Arc::new(NoopStreamInstallProvider)
}
}
}
fn resolve_unrar_sidecar_program(app_handle: &AppHandle) -> eyre::Result<PathBuf> {
let sidecar = app_handle.shell().sidecar("unrar")?;
let command: std::process::Command = sidecar.into();
Ok(PathBuf::from(command.get_program()))
}
fn emit_game_id_event(app_handle: &AppHandle, event: &str, id: &str, label: &str) {
if let Err(e) = app_handle.emit(event, Some(id.to_owned())) {
log::error!("{label}: Failed to emit {event} event: {e}");
@@ -1990,6 +2092,7 @@ async fn handle_peer_event(app_handle: &AppHandle, event: PeerEvent) {
}
PeerEvent::NoPeersHaveGame { id } => {
log::warn!("PeerEvent::NoPeersHaveGame received for {id}");
clear_pending_stream_install(app_handle, &id).await;
emit_game_id_event(
app_handle,
"game-no-peers",
@@ -2028,6 +2131,7 @@ async fn handle_peer_event(app_handle: &AppHandle, event: PeerEvent) {
}
PeerEvent::DownloadGameFilesFailed { id } => {
log::warn!("PeerEvent::DownloadGameFilesFailed received");
clear_pending_stream_install(app_handle, &id).await;
emit_game_id_event(
app_handle,
"game-download-failed",
@@ -2037,6 +2141,7 @@ async fn handle_peer_event(app_handle: &AppHandle, event: PeerEvent) {
}
PeerEvent::DownloadGameFilesAllPeersGone { id } => {
log::warn!("PeerEvent::DownloadGameFilesAllPeersGone received for {id}");
clear_pending_stream_install(app_handle, &id).await;
emit_game_id_event(
app_handle,
"game-download-peers-gone",
@@ -2175,17 +2280,27 @@ async fn handle_got_game_files(
);
let state = app_handle.state::<LanSpreadState>();
let stream_install = state.pending_stream_installs.write().await.remove(&id);
let peer_ctrl = state.peer_ctrl.read().await.clone();
if let Some(peer_ctrl) = peer_ctrl
&& let Err(e) = peer_ctrl.send(PeerCommand::DownloadGameFiles {
id,
file_descriptions,
})
&& let Err(e) = if stream_install {
peer_ctrl.send(PeerCommand::StreamInstallGame { id })
} else {
peer_ctrl.send(PeerCommand::DownloadGameFiles {
id,
file_descriptions,
})
}
{
log::error!("Failed to send PeerCommand::DownloadGameFiles: {e}");
log::error!("Failed to continue queued game transfer: {e}");
}
}
async fn clear_pending_stream_install(app_handle: &AppHandle, id: &str) {
let state = app_handle.state::<LanSpreadState>();
state.pending_stream_installs.write().await.remove(id);
}
fn handle_download_finished(app_handle: &AppHandle, id: String) {
log::info!("PeerEvent::DownloadGameFilesFinished received");
emit_game_id_event(
@@ -2679,6 +2794,7 @@ pub fn run() {
.invoke_handler(tauri::generate_handler![
request_games,
install_game,
stream_install_game,
run_game,
start_server,
game_directory_exists,