-

Author: Bashamega

src/build/mdn-comments.ts

@@ -93,6 +93,10 @@ async function getIndexMdContents(
 }
 
 export async function generateDescription(): Promise<Record<string, string>> {
+  const stats = await fs.stat(basePath);
+  if (!stats.isDirectory()) {
+    throw new Error("MDN submodule does not exist; try running `git submodule update --init`");
+  }
   try {
     const folders = await getDirectories(basePath);
     if (folders.length > 0) {