Refactor website build script (#11488)

scripts/utils/index.mjs

@@ -0,0 +1,44 @@
+import fs from "node:fs/promises";
+import url from "node:url";
+import path from "node:path";
+
+async function readJson(file) {
+  const data = await fs.readFile(file);
+  return JSON.parse(data);
+}
+
+function writeJson(file, content) {
+  content = JSON.stringify(content, null, 2);
+  return writeFile(file, content);
+}
+
+async function copyFile(from, to) {
+  const data = await fs.readFile(from);
+  return writeFile(to, data);
+}
+
+async function writeFile(file, content) {
+  const directory = path.dirname(file);
+  try {
+    await fs.mkdir(directory, { recursive: true });
+  } catch {
+    // noop
+  }
+  return fs.writeFile(file, content);
+}
+
+const PROJECT_ROOT = url.fileURLToPath(new URL("../../", import.meta.url));
+const BUILD_CACHE_DIR = path.join(PROJECT_ROOT, ".cache");
+const DIST_DIR = path.join(PROJECT_ROOT, "dist");
+const WEBSITE_DIR = path.join(PROJECT_ROOT, "website");
+
+export {
+  PROJECT_ROOT,
+  DIST_DIR,
+  BUILD_CACHE_DIR,
+  WEBSITE_DIR,
+  readJson,
+  writeJson,
+  writeFile,
+  copyFile,
+};