Fable clean up

scripts/lib/walk.mjs

@@ -0,0 +1,23 @@
+import { readdir, stat } from 'node:fs/promises';
+import path from 'node:path';
+
+// Recursively lists every file under entryPath. A path that is itself a file
+// resolves to a single-element list, so callers can mix files and directories.
+export async function walk(entryPath) {
+  const entryStat = await stat(entryPath);
+  if (entryStat.isFile()) return [entryPath];
+
+  const entries = await readdir(entryPath, { withFileTypes: true });
+  const files = [];
+
+  for (const entry of entries) {
+    const fullPath = path.join(entryPath, entry.name);
+    if (entry.isDirectory()) {
+      files.push(...(await walk(fullPath)));
+    } else {
+      files.push(fullPath);
+    }
+  }
+
+  return files;
+}