text: import svelte from 'rollup-plugin-svelte';
  import commonjs from '@rollup/plugin-commonjs';
  import resolve from '@rollup/plugin-node-resolve';
  import livereload from 'rollup-plugin-livereload';
  import { terser } from 'rollup-plugin-terser';
  import sveltePreprocess from 'svelte-preprocess';
  import typescript from '@rollup/plugin-typescript';
  import json from "@rollup/plugin-json";
  import css from 'rollup-plugin-css-only';
  
  const production = !process.env.ROLLUP_WATCH;
  
  function serve() {
    let server;
  
    function toExit() {
      if (server) {
        server.on("exit", () => {process.exit()});
        server.kill('SIGINT');
      }
    }
  
    return {
      writeBundle() {
        if (server) return;
  
        let serverArgs = ['./scripts/devserver.js'];
        if (process.argv.includes("debug")) {
          serverArgs.push("debug");
        }
        if (process.argv.includes("no_front")) {
          serverArgs.push("no_front");
        }
        if (process.argv.includes("slow")) {
          serverArgs.push("slow");
        }
        server = require('child_process').spawn('node', serverArgs, {
          stdio: ['ignore', 'inherit', 'inherit'],
          shell: true
        });
  
        process.on('SIGINT', toExit);
        process.on('SIGTERM', toExit);
        process.on('exit', toExit);
      }
    };
  }
  
  export default {
    input: 'src/main.ts',
    output: {
      sourcemap: !production,
      format: 'es',
      name: 'app',
      dir: 'public/build/'
    },
    plugins: [
      svelte({
        preprocess: sveltePreprocess({ sourceMap: !production }),
        compilerOptions: {
          // enable run-time checks when not in production
          dev: !production
        }
      }),
      // we'll extract any component CSS out into
      // a separate file - better for performance
      css({ output: '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'],
        preferBuiltins: false,
      }),
      commonjs(),
      json(),
      typescript({
        sourceMap: !production,
        inlineSources: !production
      }),
  
      // In dev mode, run the dev server
      // 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
    }
  };
  