From 88a591050e0a05dd8bfe3762cf935a319acf6dd5 Mon Sep 17 00:00:00 2001
From: Frank Denis <github@pureftpd.org>
Date: Sat, 20 Feb 2021 21:24:29 +0100
Subject: [PATCH] Add support for Node without wasmer-js

---
 test/default/wasi-test-wrapper.sh | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/test/default/wasi-test-wrapper.sh b/test/default/wasi-test-wrapper.sh
index 4f22b2f9..c454fe02 100755
--- a/test/default/wasi-test-wrapper.sh
+++ b/test/default/wasi-test-wrapper.sh
@@ -27,12 +27,6 @@ if [ -z "$WASI_RUNTIME" ] || [ "$WASI_RUNTIME" = "wasmer" ]; then
   fi
 fi
 
-if [ -z "$WASI_RUNTIME" ] || [ "$WASI_RUNTIME" = "wasmer-js" ]; then
-  if command -v wasmer-js >/dev/null; then
-    wasmer-js run "$1" --dir=. && exit 0
-  fi
-fi
-
 if [ -z "$WASI_RUNTIME" ] || [ "$WASI_RUNTIME" = "wasm3" ]; then
   if command -v wasm3 >/dev/null; then
     wasm3 "$1" && exit 0
@@ -65,5 +59,27 @@ if [ -z "$WASI_RUNTIME" ] || [ "$WASI_RUNTIME" = "lucet" ]; then
   fi
 fi
 
+if [ -z "$WASI_RUNTIME" ] || [ "$WASI_RUNTIME" = "node" ]; then
+  if echo | node --experimental-wasi-unstable-preview1 >/dev/null 2>&1; then
+    {
+      echo "import fs from 'fs'; import { WASI } from 'wasi';"
+      echo "const wasi = new WASI({args: process.argv, env: process.env, preopens: {'.':'.'}});"
+      echo "const importObject = { wasi_snapshot_preview1: wasi.wasiImport };"
+      echo "const wasm = await WebAssembly.compile(fs.readFileSync('${1}'));"
+      echo "const instance = await WebAssembly.instantiate(wasm, importObject);"
+      echo "wasi.start(instance);"
+    } >"${1}.mjs"
+    cat "${1}.mjs" >/tmp/a
+    node --experimental-wasi-unstable-preview1 "${1}.mjs" 2>/tmp/err &&
+      rm -f "${1}.mjs" && exit 0
+  fi
+fi
+
+if [ -z "$WASI_RUNTIME" ] || [ "$WASI_RUNTIME" = "wasmer-js" ]; then
+  if command -v wasmer-js >/dev/null; then
+    wasmer-js run "$1" --dir=. && exit 0
+  fi
+fi
+
 echo "WebAssembly runtime failed" >&2
 exit 1