initial wazero runtime

go.mod

@@ -0,0 +1,8 @@
+module wasiplaytime
+
+go 1.21.5
+
+require (
+	github.com/davidmdm/x/xcontext v0.0.1
+	github.com/tetratelabs/wazero v1.6.0
+)

go.sum

@@ -0,0 +1,12 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davidmdm/x/xcontext v0.0.1 h1:ktCEEBaJvSr7q0/chXxQbrJymkzRgnrxFXCrs/givkk=
+github.com/davidmdm/x/xcontext v0.0.1/go.mod h1:lfAacRD741WjdRwwuTrCaKtvEgPsGMSlmfwgib2SpVA=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
+github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+github.com/tetratelabs/wazero v1.6.0 h1:z0H1iikCdP8t+q341xqepY4EWvHEw8Es7tlqiVzlP3g=
+github.com/tetratelabs/wazero v1.6.0/go.mod h1:0U0G41+ochRKoPKCJlh0jMg1CHkyfK8kDqiirMmKY8A=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

program/main.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	fmt.Println("hello world!")
+}

runtime/main.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"context"
+	"crypto/rand"
+	_ "embed"
+	"flag"
+	"fmt"
+	"os"
+	"syscall"
+
+	"github.com/davidmdm/x/xcontext"
+	"github.com/tetratelabs/wazero"
+	"github.com/tetratelabs/wazero/imports/wasi_snapshot_preview1"
+)
+
+func main() {
+	if err := run(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+// main is an example of how to extend a Go application with an addition
+// function defined in WebAssembly.
+//
+// Since addWasm was compiled with TinyGo's `wasi` target, we need to configure
+// WASI host imports.
+func run() error {
+	// Parse positional arguments.
+	flag.Parse()
+
+	wasm, err := os.ReadFile(flag.Arg(0))
+	if err != nil {
+		return fmt.Errorf("failed to read wasm program: %w", err)
+	}
+
+	// Choose the context to use for function calls.
+	ctx, done := xcontext.WithSignalCancelation(context.Background(), syscall.SIGINT)
+	defer done()
+
+	cfg := wazero.
+		NewRuntimeConfig().
+		WithCloseOnContextDone(true)
+
+	// Create a new WebAssembly Runtime.
+	wasi := wazero.NewRuntimeWithConfig(ctx, cfg)
+	defer wasi.Close(ctx) // This closes everything this Runtime created.
+
+	wasi_snapshot_preview1.MustInstantiate(ctx, wasi)
+
+	// Because we are running a binary directly rather than embedding in an application,
+	// we default to wiring up commonly used OS functionality.
+	mod, err := wasi.CompileModule(ctx, wasm)
+	if err != nil {
+		return fmt.Errorf("failed to compile module: %w", err)
+	}
+
+	moduleCfg := wazero.
+		NewModuleConfig().
+		WithStdout(os.Stdout).
+		WithStderr(os.Stderr).
+		WithStdin(os.Stdin).
+		WithRandSource(rand.Reader).
+		WithSysNanosleep().
+		WithSysNanotime().
+		WithSysWalltime().
+		WithArgs(append([]string{flag.Arg(0)}, flag.Args()[1:]...)...)
+
+	if _, err := wasi.InstantiateModule(ctx, mod, moduleCfg); err != nil {
+		return fmt.Errorf("failed to instantiate module: %w", err)
+	}
+
+	return nil
+}