rollup.config.js

import nodeResolve from "@rollup/plugin-node-resolve"
import commonjs from "@rollup/plugin-commonjs"
import { terser } from "rollup-plugin-terser"

// If truthy, it expects all y-* dependencies in the upper directory.
// This is only necessary if you want to test and make changes to several repositories.
const localImports = process.env.LOCALIMPORTS

if (localImports) {
  console.info("Using local imports")
}

const customModules = new Set([
  "y-websocket",
  "y-codemirror",
  "y-ace",
  "y-textarea",
  "y-quill",
  "y-dom",
  "y-prosemirror",
  "y-monaco",
])
/**
 * @type {Set<any>}
 */
const customLibModules = new Set(["lib0", "y-protocols"])

// @ts-ignore We use this for debugging
const debugResolve = {
  resolveId(importee) {
    if (localImports) {
      if (importee === "yjs") {
        return `${process.cwd()}/../yjs/src/index.js`
      }
      if (customModules.has(importee.split("/")[0])) {
        return `${process.cwd()}/../${importee}/src/${importee}.js`
      }
      if (customLibModules.has(importee.split("/")[0])) {
        return `${process.cwd()}/../${importee}`
      }
    }
    return null
  },
}
const minificationPlugins = process.env.PRODUCTION
  ? [
      terser({
        module: true,
        compress: {
          hoist_vars: true,
          module: true,
          passes: 1,
          pure_getters: true,
          unsafe_comps: true,
          unsafe_undefined: true,
        },
        mangle: {
          toplevel: true,
        },
      }),
    ]
  : []

const plugins = [
  debugResolve,
  nodeResolve({
    mainFields: ["module", "browser", "main"],
  }),
  commonjs(),
  ...minificationPlugins,
]

export default [
  {
    input: "./demo/index.js",
    output: [
      {
        name: "demo",
        file: "dist/demo.js",
        format: "iife",
        sourcemap: true,
      },
    ],
    plugins,
  },
  {
    input: "./test/index.js",
    output: [
      {
        name: "test",
        file: "dist/test.js",
        format: "iife",
        sourcemap: true,
      },
    ],
    plugins,
  },
  {
    input: "./src/y-webrtc.js",
    external: (id) => /^(lib0|yjs|y-protocols|simple-peer)/.test(id),
    output: [
      {
        name: "y-webrtc",
        file: "dist/y-webrtc.cjs",
        format: "cjs",
        sourcemap: true,
        paths: (path) => {
          if (/^lib0\//.test(path)) {
            return `lib0/dist${path.slice(4, -3)}.cjs`
          } else if (/^y-protocols\//.test(path)) {
            return `y-protocols/dist${path.slice(11, -3)}.cjs`
          }
          return path
        },
      },
    ],
    plugins,
  },
]