update livereload script

Author: shirakaba

demo/livereload.js

@@ -0,0 +1,29 @@
+#!/usr/bin/env node
+const { spawn } = require("child_process");
+const { normalize } = require("path");
+
+// 'disconnect' is not needed as it will only be raised, when either the child process or this process calss disconnect explicitly.
+// We are abel to ensure, that this will never happen, as we do not need communication with the spawned subprocess
+const terminationSignals = ["close", "exit"];
+
+function startSubprocess() {
+  return new Promise((res, rej) => {
+    const [command, ...args] = process.argv.slice(2);
+    const proc = spawn(normalize(command), args, {
+      // use parents stdio
+      stdio: "inherit",
+      shell:
+        process.platform === "win32" ||
+        /^(msys|cygwin)$/.test(process.env.OSTYPE),
+    });
+    terminationSignals.forEach((event) => proc.on(event, res));
+    proc.on("error", rej);
+  });
+}
+
+async function loop() {
+  let code = 64;
+  while (code === 64) code = await startSubprocess();
+}
+
+loop();

demo/livereload.sh

@@ -7,7 +7,7 @@
   "scripts": {
     "build": "webpack --mode production",
     "dev": "webpack --mode=development",
-    "start": "./livereload.sh node_modules/.bin/qode ./dist/index.js",
+    "start": "node livereload.js node_modules/.bin/qode ./dist/index.js",
     "debug": "qode --inspect ./dist/index.js"
   },
   "dependencies": {