rollup.config.js

import typescript from '@rollup/plugin-typescript';
import { nodeResolve } from '@rollup/plugin-node-resolve';
import commonjs from '@rollup/plugin-commonjs';
import { env } from "process";
import babel from '@rollup/plugin-babel';
import replace from "@rollup/plugin-replace";
import { terser } from "rollup-plugin-terser";
import copy from "rollup-plugin-copy";
import ttypescript from "ttypescript";
import typescript2 from "rollup-plugin-typescript2";
import webWorker from "rollup-plugin-web-worker-loader";
import fs from'fs';
import LZString from 'lz-string';
import postprocess from 'rollup-plugin-postprocess';

const isProd = (process.env.NODE_ENV === "production");

const excalidraw_pkg = isProd
  ? fs.readFileSync("./node_modules/@zsviczian/excalidraw/dist/excalidraw.production.min.js", "utf8")
  : fs.readFileSync("./node_modules/@zsviczian/excalidraw/dist/excalidraw.development.js", "utf8");
const react_pkg = isProd
  ? fs.readFileSync("./node_modules/react/umd/react.production.min.js", "utf8")
  : fs.readFileSync("./node_modules/react/umd/react.development.js", "utf8");
const reactdom_pkg = isProd
  ? fs.readFileSync("./node_modules/react-dom/umd/react-dom.production.min.js", "utf8")
  : fs.readFileSync("./node_modules/react-dom/umd/react-dom.development.js", "utf8");
const lzstring_pkg = fs.readFileSync("./node_modules/lz-string/libs/lz-string.min.js", "utf8");

const manifestStr = fs.readFileSync("manifest.json", "utf-8");
const manifest = JSON.parse(manifestStr);
console.log(manifest.version);

const packageString = ';'+lzstring_pkg+'const EXCALIDRAW_PACKAGES = "' + LZString.compressToBase64(react_pkg + reactdom_pkg + excalidraw_pkg) + '";' +
  'const {react, reactDOM, excalidrawLib} = window.eval.call(window, `(function() {' +
  '${LZString.decompressFromBase64(EXCALIDRAW_PACKAGES)};' +
  'return {react:React, reactDOM:ReactDOM, excalidrawLib: ExcalidrawLib};})();`);' +
  'const PLUGIN_VERSION="'+manifest.version+'";';



const BASE_CONFIG = {
  input: 'src/main.ts',
  external: ['obsidian', '@zsviczian/excalidraw', 'react', 'react-dom'],
}

const getRollupPlugins = (tsconfig, ...plugins) =>
    [
        typescript2(tsconfig),
        nodeResolve({ browser: true }),
        commonjs(),
        webWorker({ inline: true, forceInline: true, targetPlatform: "browser" }),
    ].concat(plugins);

const BUILD_CONFIG = {
  ...BASE_CONFIG,
  output: {
    dir: '.',
    sourcemap: isProd?false:'inline',
    format: 'cjs',
    exports: 'default',
  },
  plugins: [
    replace({
      preventAssignment: true,
      "process.env.NODE_ENV": JSON.stringify(env.NODE_ENV),
    }),
    babel({
      exclude: "node_modules/**"
    }),
    commonjs(),
    nodeResolve({ browser: true, preferBuiltins: false }),
    typescript({inlineSources: !isProd}),
    ...isProd 
    ? [
      terser({toplevel: false, compress: {passes: 2}}),
      //!postprocess - the version available on npmjs does not work, need this update: 
      //  npm install brettz9/rollup-plugin-postprocess#update --save-dev
      //  https://github.com/developit/rollup-plugin-postprocess/issues/10
      postprocess([
        [/,React=require\("react"\);/, packageString],
      ])
    ] 
    : [
      postprocess([
        [/var React = require\('react'\);/, packageString],
      ])
    ],
  ],
}

const LIB_CONFIG = {
  ...BASE_CONFIG,
  input: "src/index.ts",
  output: {
    dir: "lib",
    sourcemap: true,
    format: "cjs",
    name: "Excalidraw (Library)",
  },
  plugins: getRollupPlugins(
      { tsconfig: "tsconfig-lib.json", typescript: ttypescript },
      copy({ targets: [{ src: "src/*.d.ts", dest: "lib/typings" }] })
  ),  
}

let config = [];
if(process.env.NODE_ENV === "lib") {
  config.push(LIB_CONFIG);
} else {
  config.push(BUILD_CONFIG);
}

export default config;