rollup.config.js

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 css from 'rollup-plugin-css-only'

import sri from 'rollup-plugin-sri'
import html from '@rollup/plugin-html'
const production = !process.env.ROLLUP_WATCH

function serve() {
  let server

  function toExit() {
    if (server) server.kill(0)
  }

  return {
    writeBundle() {
      if (server) return
      server = require('child_process').spawn('npm', ['run', 'start', '--', '--dev'], {
        stdio: ['ignore', 'inherit', 'inherit'],
        shell: true
      })

      process.on('SIGTERM', toExit)
      process.on('exit', toExit)
    }
  }
}

export default {
  input: 'src/main.ts',
  output: {
    sourcemap: true,
    format: 'iife',
    name: 'app',
    dir: 'public',
  },
  plugins: [
    production && css(),
    html({
      title: 'MASSIVE-PASS',
      meta: [
        { charset: 'utf-8' },
        {
          name: 'viewport',
          content: 'width=device-width,initial-scale=1'
        },

        {
          name: 'description',
          content: 'a completely unnecessary password generator'
        },
        {
          name: 'author',
          content: 'simon, simon@ramsay.xyz'
        }
      ].concat(production ? {
        'http-equiv': "Content-Security-Policy",
        content: `default-src ; script-src 'self'; style-src 'self';`
      } : undefined),

    }),
    production && sri({
      algorithms: ['sha512'],
    }),

    svelte({
      emitCss: production,

      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


    // 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(),
    typescript({
      sourceMap: !production,
      inlineSources: !production
    }),

    // 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
  }
}