text: import commonjs from "@rollup/plugin-commonjs";
  import resolve from "@rollup/plugin-node-resolve";
  import typescript from "@rollup/plugin-typescript";
  import livereload from "rollup-plugin-livereload";
  import { terser } from "rollup-plugin-terser";
  import scss from "rollup-plugin-scss";
  import postcss from "postcss";
  import autoprefixer from "autoprefixer";
  import { spawn } from "child_process";
  
  const production = !process.env.ROLLUP_WATCH;
  
  function serve() {
    let server;
  
    function toExit() {
      if (server) server.kill(0);
    }
  
    return {
      writeBundle() {
        if (server) return;
        server = spawn("npm", ["run", "dev:server"], {
          stdio: ["ignore", "inherit", "inherit"],
          shell: true
        });
  
        process.on("SIGTERM", toExit);
        process.on("exit", toExit);
      }
    };
  }
  
  export default {
    input: "./src/client/scripts/main.ts",
    output: {
      sourcemap: true,
      format: "iife",
      name: "app",
      file: "./public/bundle.js"
    },
    plugins: [
      // teach rollup how to handle typescript imports
      typescript({
        rootDir: "./src",
        sourceMap: !production
      }),
      scss({
        output: "./public/bundle.css",
        sourceMap: !production,
        processor: () => postcss([ autoprefixer() ]),
      }),
  
      // If you have external dependencies installed from
      // npm, you'll most likely need these plugins. In
      // some cases you'll need additional configuration -
      // consult the documentation for details:
      // https://github.com/rollup/plugins/tree/master/packages/commonjs
      resolve({ browser: true }),
      commonjs(),
  
      // In dev mode, call `npm run start` once
      // the bundle has been generated
  		!production && serve(),
  
      // Watch the `public` directory and refresh the
      // browser on changes when not in production
      !production && livereload("public"),
  
      // If we're building for production (npm run build
      // instead of npm run dev), minify
      production && terser()
    ],
    watch: {
      clearScreen: false
    }
  }
  