as is

rollup-plugin-robots.ts

@@ -0,0 +1,21 @@
+import { join } from "path";
+import { type Plugin } from "rollup";
+
+export default function robotsPlugin(): Plugin {
+  return {
+    name: "rollup-plugin-robots",
+    writeBundle(options, _) {
+      this.debug(options.dir || "dir undefined");
+      if (options.dir) {
+        this.fs
+          .writeFile(
+            join(options.dir, "robots.txt"),
+            "User-agent: *\nDisallow: /",
+          )
+          .catch((err) => {
+            this.error(err);
+          });
+      }
+    },
+  };
+}