build-bundle.js

import { readFileSync, writeFileSync } from "node:fs";
import { resolve } from "node:path";

const root = resolve(import.meta.dirname);
const sources = [
  "js/indexer-shared.js",
  "js/database-utils.js",
  "js/localization.js",
  "js/app.js"
];

const banner = `/* IntentionsDatabase bundle: generated by build-bundle.js */\n(() => {\n"use strict";\n`;
const footer = `\n})();\n`;

function transformModule(code) {
  return code
    .replace(/^\s*import\s+\{[^}]*\}\s+from\s+["'][^"']+["'];?\s*$/gm, "")
    .replace(/^\s*import\s+[^;]+;\s*$/gm, "")
    .replace(/\bexport\s+function\s+/g, "function ")
    .replace(/\bexport\s+const\s+/g, "const ")
    .replace(/\bexport\s+class\s+/g, "class ")
    .replace(/\bexport\s+\{[\s\S]*?\};?\s*$/gm, "")
    .trim();
}

const parts = sources.map(relativePath => {
  const absolutePath = resolve(root, relativePath);
  const content = readFileSync(absolutePath, "utf8");
  return `\n/* ${relativePath} */\n${transformModule(content)}\n`;
});

writeFileSync(resolve(root, "app.bundle.js"), `${banner}${parts.join("\n")}${footer}`, "utf8");
console.log("Built IntentionsDatabase/app.bundle.js");