ddidderr
574acfca45
Some games ship an `account_name.txt` file somewhere under the unpacked `local/` tree (location varies per game). After install or update, write the configured username into the first such file we find so the game launches under the user's account instead of whatever default the archive contains. The search is a deterministic alphabetical DFS rooted at the install staging dir (`.local.installing/`, which becomes `local/` on rename), stopping at the first regular-file match. Symlinks named `account_name.txt` are skipped (`is_file()` is false for symlinks on Linux), so a hostile archive can't redirect the write outside the game tree. If no `account_name.txt` exists anywhere in the install, the step is a no-op. If the write fails, the existing install rollback (cleanup of staging on fresh installs, restore from backup on updates) handles it — no partial state is left behind. The username flows from the Tauri layer, where it is already sanitized by `sanitize_username`, down through `PeerCommand` variants (`InstallGame`, `DownloadGameFiles`, `DownloadGameFilesWithOptions`) into `install`/`update`, which now take an `Option<&str> account_name`. For the "install game that isn't downloaded yet" path the username has to bridge the async gap between the `GetGame` / `FetchLatestFromPeers` request and the eventual `GotGameFiles` event; we park it in a per-game-id map on `LanSpreadState` and pop it when forwarding the download command. The map is also cleared defensively on `cancel_download`, `DownloadGameFilesFailed`, and `DownloadGameFilesAllPeersGone` so a stale entry can't bleed into a subsequent install with a different username. `PeerCommand` is the in-process command channel, not the wire protocol; no on-wire types changed, so the "one wire version" policy is preserved. The peer-cli harness keeps passing `account_name: None` since it tests peer interop, not user-facing settings. # Test Plan Unit tests in `crates/lanspread-peer/src/install/transaction.rs`: - `install_overwrites_first_account_name_file` — unpacker creates `a/account_name.txt` and `z/account_name.txt`; after install with username "Alice", `a/` is overwritten and `z/` is left untouched, pinning the sorted-DFS "first match wins" behavior. - `install_account_name_missing_file_is_noop` — install with a username but no `account_name.txt` anywhere in the archive succeeds and creates no spurious file. Manual GUI check: in Settings, set a username; install a game whose archive contains `account_name.txt`; open `local/` and confirm the file now holds the configured username. Repeat for the update flow (install, change username, click update). Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
lanspread
Description
Peer-to-peer game library sharing for LAN parties.
- Peers let users browse and download games from each other
- they discover each other on the local network via mDNS
- they exchange library metadata over QUIC
Ships as a Tauri desktop app.
Development
Prerequisites
# install Tauri CLI
cargo install tauri-cli
# install Deno with a package manager or from https://deno.land/
Build or Run
# build
just build
# run
just run
# test
just test
Scripted peer harness
crates/lanspread-peer-cli runs the peer runtime without the GUI and speaks
JSONL on stdin/stdout. It is intended for automated multi-peer smoke tests.
just peer-cli-build
just peer-cli-image
just peer-cli-run alpha