build asm inside nix shell, heck copyright sign

.gitignore

@@ -1,3 +1,6 @@
 /target
 **/*.rs.bk
 Cargo.lock
+
+/test-wasm/build
+/test-wasm/node_modules

README.md

@@ -25,7 +25,10 @@ impl WasmerEnv for Env {
 }
 
 fn main() -> Result<(), Box<dyn Error>> {
-    let wasm_bytes = include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/get-string.wasm"));
+    let wasm_bytes = include_bytes!(concat!(
+        env!("CARGO_MANIFEST_DIR"),
+        "/test-wasm/build/optimized.wasm"
+    ));
     let store = Store::default();
     let module = Module::new(&store, wasm_bytes)?;
 
@@ -56,7 +59,7 @@ fn main() -> Result<(), Box<dyn Error>> {
     let memory = instance.exports.get_memory("memory").expect("get memory");
     let string = str_ptr.read(memory)?;
 
-    assert_eq!(string, "TheString");
+    assert_eq!(string, "TheString ©");
 
     Ok(())
 }

flake.nix

@@ -20,7 +20,13 @@
             buildInputs = with pkgs; [
               rust-bin.stable.latest.default
               libiconv
+              nodejs-14_x
             ];
+
+            shellHook = ''
+              cd test-wasm
+              npm run asbuild
+            '';
           };
 
         }

test-wasm/asconfig.json

@@ -0,0 +1,20 @@
+{
+  "targets": {
+    "debug": {
+      "binaryFile": "build/untouched.wasm",
+      "textFile": "build/untouched.wat",
+      "sourceMap": true,
+      "debug": true
+    },
+    "release": {
+      "binaryFile": "build/optimized.wasm",
+      "textFile": "build/optimized.wat",
+      "sourceMap": true,
+      "optimizeLevel": 3,
+      "shrinkLevel": 0,
+      "converge": false,
+      "noAssert": false
+    }
+  },
+  "options": {}
+}

get-string.ts → test-wasm/assembly/index.ts

@@ -1,3 +1,3 @@
 export function getString(): string {
-    return "TheString";
+  return "TheString ©";
 }

test-wasm/assembly/tsconfig.json

@@ -0,0 +1,6 @@
+{
+  "extends": "assemblyscript/std/assembly.json",
+  "include": [
+    "./**/*.ts"
+  ]
+}

test-wasm/index.js

@@ -0,0 +1,5 @@
+const fs = require("fs");
+const loader = require("@assemblyscript/loader");
+const imports = { /* imports go here */ };
+const wasmModule = loader.instantiateSync(fs.readFileSync(__dirname + "/build/optimized.wasm"), imports);
+module.exports = wasmModule.exports;

test-wasm/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "test-wasm",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "node tests",
+    "asbuild:untouched": "asc assembly/index.ts --target debug",
+    "asbuild:optimized": "asc assembly/index.ts --target release",
+    "asbuild": "npm run asbuild:untouched && npm run asbuild:optimized"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@assemblyscript/loader": "^0.19.7"
+  },
+  "devDependencies": {
+    "assemblyscript": "^0.19.7"
+  }
+}

test-wasm/tests/index.js

@@ -0,0 +1,4 @@
+const assert = require("assert");
+const myModule = require("..");
+assert.strictEqual(myModule.add(1, 2), 3);
+console.log("ok");

tests/strings.rs

@@ -22,7 +22,10 @@ impl WasmerEnv for Env {
 
 #[test]
 fn read_strings() -> Result<(), Box<dyn Error>> {
-    let wasm_bytes = include_bytes!("../get-string.wasm");
+    let wasm_bytes = include_bytes!(concat!(
+        env!("CARGO_MANIFEST_DIR"),
+        "/test-wasm/build/optimized.wasm"
+    ));
     let store = Store::default();
     let module = Module::new(&store, wasm_bytes)?;
 
@@ -46,7 +49,7 @@ fn read_strings() -> Result<(), Box<dyn Error>> {
     let str_ptr = get_string.call()?;
     let string = str_ptr.read(memory)?;
 
-    assert_eq!(string, "TheString");
+    assert_eq!(string, "TheString ©");
 
     Ok(())
 }