feat(go): compile on Wasm

Signed-off-by: Roman Volosatovs <rvolosatovs@riseup.net>

Author: rvolosatovs

internal/generate/wadge.go

@@ -35,6 +35,9 @@ func RunCargo(args ...string) error {
 }
 
 func main() {
+	if err := RunCargo("run", "-p", "generate-header"); err != nil {
+		log.Fatalf("failed to generate `wadge-sys` C header: %s", err)
+	}
 	if err := Run(exec.Command(
 		"go",
 		"run",

wadge.go

@@ -1,4 +1,4 @@
-//go:generate cargo run -p generate-header
+//go:build !wasm && !wasi && !wasip1 && !wasip2 && !wasm_unknown && !tinygo.wasm
 
 package wadge
 

wasm.go

@@ -0,0 +1,11 @@
+//go:build wasm || wasi || wasip1 || wasip2 || wasm_unknown || tinygo.wasm
+
+package wadge
+
+import "testing"
+
+// RunTest simply calls `f`. This function is only defined for WebAssembly targets
+// to allow unit tests relying on `wadge` in native environments to compile for Wasm.
+func RunTest(_ *testing.T, f func()) {
+	f()
+}