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);
          });
      }
    },
  };
}