wip: rustslop

examples/hello/Shakefile.hs

@@ -0,0 +1,37 @@
+import Development.Shake
+import Development.Shake.Command
+import Development.Shake.FilePath
+import Development.Shake.Util
+
+main = shakeArgs shakeOptions $ do
+  -- action $ do
+  --   sourceFiles <- getDirectoryFiles "" ["//*.luasm"]
+  --   need $ (-<.> "luac") <$> sourceFiles
+  want ["complete.component.wasm"]
+  alternatives $ do
+    "complete.component.wasm" %> \out -> do
+      need ["provider.component.wasm","importing.component.wasm"]
+      cmd_
+        "wac plug --plug"
+        "provider.component.wasm" "importing.component.wasm"
+        "-o" "complete.component.wasm"
+    "*.component.wasm" %> \out -> do
+      let wasm = out `replaceExtensions` "wasm"
+      need [wasm]
+      cmd_
+        "wasm-tools component new"
+        [wasm]
+        "-o" [out]
+    "*.wasm" %> \out -> do
+        let wit = out -<.> "wit"
+        let wat = out -<.> "wat"
+        need [wit,wat]
+        cmd_
+          "wasm-tools component embed"
+          [wit] [wat] "-o" [out]
+  phony "run" $ do
+    need ["complete.component.wasm"]
+    cmd_ "wasmtime run --invoke add(1) complete.component.wasm"
+  phony "clean" $ do
+    removeFilesAfter ".shake" ["//*"]
+    liftIO $ removeFiles "." ["*.wasm"]

examples/hello/hello.wat

@@ -0,0 +1,27 @@
+(module
+  ;; Correct module name: stdio, not stdout
+  (import "wasi:cli/stdio@0.2.6" "get-stdout"
+    (func $get_stdout (result i32)))
+
+  ;; Write and flush a buffer.
+  (import "wasi:io/streams@0.2.0" "blocking-write-and-flush"
+    (func $bwrite (param i32 i32 i32) (result i32)))
+
+  (memory (export "memory") 1)
+
+  (data (i32.const 0) "Hello, World!\n")
+
+  (func (export "main")
+    (local $stdout i32)
+    ;; Get the stdout stream handle
+    call $get_stdout
+    local.set $stdout
+
+    ;; Write "Hello, World!\n" (14 bytes) to stdout
+    local.get $stdout
+    i32.const 0
+    i32.const 14
+    call $bwrite
+    drop   ;; ignore the return value (0 = success)
+  )
+)

examples/hello/hello.wit

@@ -0,0 +1,22 @@
+package root:component;
+
+world root {
+  import wasi:cli/stdin@0.2.6;
+  import wasi:cli/stdout@0.2.6;
+
+  export wasi:cli/run@0.2.0;
+}
+
+package wasi:cli@0.2.6 {
+  interface stdout {
+    use wasi:io/streams@0.2.6.{output-stream};
+
+    get-stdout: func() -> output-stream;
+  }
+}
+
+package wasi:cli@0.2.0 {
+  interface run {
+    run: func() -> result;
+  }
+}

flake.nix

@@ -10,6 +10,7 @@
         inherit system;
       };
       shake = pkgs.callPackage ./shake-wrapper.nix {};
+      rustslop = pkgs.callPackage ./rustslop {};
     in {
       devShells.${system}.default = pkgs.mkShell {
         packages = [
@@ -20,6 +21,10 @@
           pkgs.wasm-tools
           pkgs.wac-cli
         ];
+        inputsFrom = [
+          rustslop
+        ];
+        inherit (rustslop) CARGO_BUILD_TARGET;
       };
     };
 }

rustslop/.gitignore

@@ -0,0 +1 @@
+target

rustslop/Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "rust"
+version = "0.1.0"

rustslop/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

rustslop/default.nix

@@ -0,0 +1,13 @@
+{ lib
+, rustPlatform
+}:
+
+rustPlatform.buildRustPackage (finalAttrs: {
+  pname = "rustslop";
+  version = "0.0.1";
+  src = ./.;
+  cargoLock = {
+    lockFile = ./Cargo.lock;
+  };
+  CARGO_BUILD_TARGET = "wasm32-wasip2";
+})

rustslop/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}