Sausage Agent
3435b556fb
- broker: `{"type":"exit"}` answers `exiting`; `sausage run` then stops all
actors and exits with code 75.
- flake: apps `loop` / `loop-internal` run `nix run --refresh git+ssh://.../surma/sausage -- run <world>`
in a loop; exit code 0 (/quit) ends the loop, anything else restarts.
- PROTOCOL.md, README.md, test in cli/tests/host.rs.
Not compiled: written by the Sausage agent, which cannot build the native host.
73 lines
3.0 KiB
Nix
73 lines
3.0 KiB
Nix
{
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description = "Sausage: grow a system of WASI actors by talking to it";
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inputs = {
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nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
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flake-utils.url = "github:numtide/flake-utils";
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rust-overlay.url = "github:oxalica/rust-overlay";
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rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
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};
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outputs = { nixpkgs, flake-utils, rust-overlay, ... }:
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flake-utils.lib.eachSystem flake-utils.lib.allSystems (system:
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let
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pkgs = import nixpkgs {
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inherit system;
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overlays = [ rust-overlay.overlays.default ];
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};
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# The toolchain that builds the host and, at runtime, the actors.
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rust = pkgs.rust-bin.stable.latest.default.override {
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targets = [ "wasm32-wasip2" ];
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extensions = [ "rust-src" ];
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};
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rustPlatform = pkgs.makeRustPlatform { cargo = rust; rustc = rust; };
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sausage = rustPlatform.buildRustPackage {
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pname = "sausage";
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version = "0.1.0";
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src = ./.;
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cargoLock.lockFile = ./Cargo.lock;
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cargoBuildFlags = [ "-p" "sausage" ];
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doCheck = false;
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nativeBuildInputs = [ pkgs.makeWrapper ];
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# The `cargo` actor runs cargo at runtime. Build scripts need a C linker.
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postInstall = ''
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wrapProgram $out/bin/sausage --prefix PATH : ${pkgs.lib.makeBinPath [ rust pkgs.stdenv.cc ]}
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'';
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meta.mainProgram = "sausage";
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};
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# `nix run .#loop -- <world>` runs the newest `sausage run <world>`
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# from the Gitea repo, again and again: after a crash or a broker
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# `exit` request it refreshes the flake and starts the host again,
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# so the world updates itself. `/quit` (exit code 0) ends the loop.
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# `--internal` (or `.#loop-internal`) uses Gitea's SSH port on the LAN.
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publicUrl = "git+ssh://containeruser@gitea.surma.technology:2222/surma/sausage";
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internalUrl = "git+ssh://containeruser@10.0.0.2:2222/surma/sausage";
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loop = name: url: pkgs.writeShellScriptBin name ''
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url="${url}"
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if [ "''${1:-}" = "--internal" ]; then url="${internalUrl}"; shift; fi
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if [ $# -eq 0 ]; then set -- world; fi
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while true; do
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nix run --refresh "$url#default" -- run "$@"
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code=$?
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if [ "$code" -eq 0 ]; then exit 0; fi
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echo "sausage-loop: sausage exited with $code, starting the newest version in 2 s …" >&2
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sleep 2
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done
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'';
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in
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{
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packages.default = sausage;
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apps.default = { type = "app"; program = "${sausage}/bin/sausage"; };
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apps.loop = { type = "app"; program = "${loop "sausage-loop" publicUrl}/bin/sausage-loop"; };
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apps.loop-internal = { type = "app"; program = "${loop "sausage-loop-internal" internalUrl}/bin/sausage-loop-internal"; };
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devShells.default = pkgs.mkShell {
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packages = [ rust pkgs.wasmtime pkgs.wasm-tools ];
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shellHook = ''
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export CARGO_HOME="$PWD/.cargo-home"
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'';
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};
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});
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}
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