text: import svelte from 'rollup-plugin-svelte'
  import resolve from '@rollup/plugin-node-resolve'
  import commonjs from '@rollup/plugin-commonjs'
  import livereload from 'rollup-plugin-livereload'
  import { terser } from 'rollup-plugin-terser'
  import autoPreprocess from 'svelte-preprocess'
  
  const production = !process.env.ROLLUP_WATCH
  
  export default {
    input: 'src/svelte.js',
    output: {
      sourcemap: true,
      format: 'iife',
      name: 'app',
      file: 'public/build/bundle.js',
    },
    plugins: [
      svelte({
        // enable run-time checks when not in production
        dev: !production,
        preprocess: autoPreprocess(),
        // we'll extract any component CSS out into
        // a separate file - better for performance
        css: css => {
          css.write('public/build/bundle.css')
        },
      }),
  
      // 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,
        dedupe: ['svelte'],
      }),
      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,
    },
  }
  
  function serve() {
    let started = false
  
    return {
      writeBundle() {
        if (!started) {
          started = true
  
          require('child_process').spawn(
            'npm',
            ['run', 'svelte-start', '--', '--dev'],
            {
              stdio: ['ignore', 'inherit', 'inherit'],
              shell: true,
            }
          )
        }
      },
    }
  }
  