[Scripts > InjectPoly] Rename dir, rm node_modules each time prior

poly/mkdirp.js

@@ -0,0 +1,14 @@
+// Minimal wrapper mimicking mkdirp package
+const fs = require('fs');
+
+const mk = (path, callback) => { // async
+  fs.mkdir(path, { recursive: true }, () => callback()); // Never error
+};
+
+mk.sync = (path) => { // sync
+  try {
+    fs.mkdirSync(path, { recursive: true });
+  } catch (e) { } // Never error
+};
+
+module.exports = mk;