- cargo.build (native): one source copy, tests under WASI, release
build to /state/cargo/builds/<n>/, process groups killed on cancel.
The host writes the SDK copy to /plugins/cargo/sdk/ at start.
- sausage test-runner: one instance per test, in parallel, with its own
mount table (empty world, package folder at its path); answers
core.lock, core.unlock, core.notify, core.log.
- The console: rustyline, notifications while typing, ls/cat through the
process view, methods, ps, log, activate, revert, stop, kill.
- core.notify on stdout is handled in order, before the response.
- /proc is a core layer: core/ (PROTOCOL.md, graph.json, graph.dot,
locks.json, plugins/<name>/discover.json and client.rs) and one folder
per process (info.json, log, and its /self files).
- Locks are released only after the task ended, the store dropped, and
in-flight file operations returned.
- core.activate and core.revert with copies, discovery, compatibility
checks of imports and consumers, groups, force. An admission gate
makes the snapshot of old processes complete.
- Graph of discover documents by hash, refreshed by a file watcher.
- Upgrades: grace periods (x-sausage-grace), stop, service restarts,
rpc.retired.
- SDK plugins in the real core (cli/tests/sdk.rs).
File operations under /actor/<id>/fs/ become messages from `fs` to <id>
(fs_read, fs_write, fs_mkdir, fs_remove, fs_rename) with a 10 s timeout.
vfs.rs wraps the wasi:filesystem implementation of wasmtime-wasi.
Staging every write until close broke tempfile, git, and SQLite, which
expect normal files. Actors that need an atomic publish write a temporary
file and rename it; the SDK has write_atomic for that.
- one live instance per actor: check after the lock; dropping an instance kills it
- state snapshots keep target/ and .git/; only source copies skip them
- one shutdown deadline; output during shutdown is still routed
- deliveries route stdout meanwhile; a stuck stdin kills the instance
(no partial lines) and the sender gets undeliverable; control requests
are not blocked by a stuck delivery
- Host::stop aborts running broker and cargo requests first
- compile a version before installing it; roll back if it does not start
- unique archive names; a failed archive keeps the actor manageable
- commit on close: truncate without create; directory renames
- candidates see SAUSAGE_VERSION and the existing state of a new actor
- the host publishes PROTOCOL.md at /actor/broker/public/
Imported from the spike branch, with:
- a library crate (Host API) for the CLI and the tests
- JSON test scenarios for candidates
- commit on close only for new or truncated files
- a Nix flake: nix run -- init, nix run -- run
surma
Sausage Agent