transform server to a proper esm module

bin/callback.js

@@ -1,18 +1,18 @@
-const http = require('http')
-const number = require('lib0/number')
+import http from 'http'
+import * as number from 'lib0/number'
 
 const CALLBACK_URL = process.env.CALLBACK_URL ? new URL(process.env.CALLBACK_URL) : null
 const CALLBACK_TIMEOUT = number.parseInt(process.env.CALLBACK_TIMEOUT || '5000')
 const CALLBACK_OBJECTS = process.env.CALLBACK_OBJECTS ? JSON.parse(process.env.CALLBACK_OBJECTS) : {}
 
-exports.isCallbackSet = !!CALLBACK_URL
+export const isCallbackSet = !!CALLBACK_URL
 
 /**
  * @param {Uint8Array} update
  * @param {any} origin
- * @param {import('./utils.cjs').WSSharedDoc} doc
+ * @param {import('./utils.js').WSSharedDoc} doc
  */
-exports.callbackHandler = (update, origin, doc) => {
+export const callbackHandler = (update, origin, doc) => {
   const room = doc.name
   const dataToSend = {
     room,
@@ -63,7 +63,7 @@ const callbackRequest = (url, timeout, data) => {
 /**
  * @param {string} objName
  * @param {string} objType
- * @param {import('./utils.cjs').WSSharedDoc} doc
+ * @param {import('./utils.js').WSSharedDoc} doc
  */
 const getContent = (objName, objType, doc) => {
   switch (objType) {

bin/server.js

@@ -1,11 +1,11 @@
 #!/usr/bin/env node
 
-const WebSocket = require('ws')
-const http = require('http')
-const number = require('lib0/number')
-const wss = new WebSocket.Server({ noServer: true })
-const setupWSConnection = require('./utils.cjs').setupWSConnection
+import WebSocket from 'ws'
+import http from 'http'
+import * as number from 'lib0/number'
+import { setupWSConnection } from './utils.js'
 
+const wss = new WebSocket.Server({ noServer: true })
 const host = process.env.HOST || 'localhost'
 const port = number.parseInt(process.env.PORT || '1234')
 

bin/utils.js

@@ -1,15 +1,14 @@
-const Y = require('yjs')
-const syncProtocol = require('y-protocols/sync')
-const awarenessProtocol = require('y-protocols/awareness')
+import * as Y from 'yjs'
+import * as syncProtocol from 'y-protocols/sync'
+import * as awarenessProtocol from 'y-protocols/awareness'
 
-const encoding = require('lib0/encoding')
-const decoding = require('lib0/decoding')
-const map = require('lib0/map')
+import * as encoding from 'lib0/encoding'
+import * as decoding from 'lib0/decoding'
+import * as map from 'lib0/map'
 
-const debounce = require('lodash.debounce')
+import debounce from 'lodash.debounce'
 
-const callbackHandler = require('./callback.cjs').callbackHandler
-const isCallbackSet = require('./callback.cjs').isCallbackSet
+import { callbackHandler, isCallbackSet } from './callback.js'
 
 const CALLBACK_DEBOUNCE_WAIT = parseInt(process.env.CALLBACK_DEBOUNCE_WAIT || '2000')
 const CALLBACK_DEBOUNCE_MAXWAIT = parseInt(process.env.CALLBACK_DEBOUNCE_MAXWAIT || '10000')
@@ -50,7 +49,7 @@ if (typeof persistenceDir === 'string') {
  * @param {{bindState: function(string,WSSharedDoc):void,
  * writeState:function(string,WSSharedDoc):Promise<any>,provider:any}|null} persistence_
  */
-exports.setPersistence = persistence_ => {
+export const setPersistence = persistence_ => {
   persistence = persistence_
 }
 
@@ -58,14 +57,12 @@ exports.setPersistence = persistence_ => {
  * @return {null|{bindState: function(string,WSSharedDoc):void,
   * writeState:function(string,WSSharedDoc):Promise<any>}|null} used persistence layer
   */
-exports.getPersistence = () => persistence
+export const getPersistence = () => persistence
 
 /**
  * @type {Map<string,WSSharedDoc>}
  */
-const docs = new Map()
-// exporting docs so that others can use it
-exports.docs = docs
+export const docs = new Map()
 
 const messageSync = 0
 const messageAwareness = 1
@@ -96,11 +93,11 @@ let contentInitializor = _ydoc => Promise.resolve()
  *
  * @param {(ydoc: Y.Doc) => Promise<void>} f
  */
-exports.setContentInitializor = (f) => {
+export const setContentInitializor = (f) => {
   contentInitializor = f
 }
 
-class WSSharedDoc extends Y.Doc {
+export class WSSharedDoc extends Y.Doc {
   /**
    * @param {string} name
    */
@@ -152,8 +149,6 @@ class WSSharedDoc extends Y.Doc {
   }
 }
 
-exports.WSSharedDoc = WSSharedDoc
-
 /**
  * Gets a Y.Doc by name, whether in memory or on disk
  *
@@ -161,7 +156,7 @@ exports.WSSharedDoc = WSSharedDoc
  * @param {boolean} gc - whether to allow gc on the doc (applies only when created)
  * @return {WSSharedDoc}
  */
-const getYDoc = (docname, gc = true) => map.setIfUndefined(docs, docname, () => {
+export const getYDoc = (docname, gc = true) => map.setIfUndefined(docs, docname, () => {
   const doc = new WSSharedDoc(docname)
   doc.gc = gc
   if (persistence !== null) {
@@ -171,8 +166,6 @@ const getYDoc = (docname, gc = true) => map.setIfUndefined(docs, docname, () =>
   return doc
 })
 
-exports.getYDoc = getYDoc
-
 /**
  * @param {any} conn
  * @param {WSSharedDoc} doc
@@ -254,7 +247,7 @@ const pingTimeout = 30000
  * @param {import('http').IncomingMessage} req
  * @param {any} opts
  */
-exports.setupWSConnection = (conn, req, { docName = (req.url || '').slice(1).split('?')[0], gc = true } = {}) => {
+export const setupWSConnection = (conn, req, { docName = (req.url || '').slice(1).split('?')[0], gc = true } = {}) => {
   conn.binaryType = 'arraybuffer'
   // get doc, initialize if it does not exist yet
   const doc = getYDoc(docName, gc)

rollup.config.mjs

@@ -1,18 +1,12 @@
-export default {
-  input: './src/y-websocket.js',
-  external: id => /^(lib0|yjs|y-protocols)/.test(id),
+  export default [{
+    input: ['./src/y-websocket.js', './bin/server.js', './bin/utils.js'],
+    external: id => /^(lib0|yjs|y-protocols|ws|lodash\.debounce|http)/.test(id),
     output: [{
-    name: 'y-websocket',
-    file: 'dist/y-websocket.cjs',
+      dir: 'dist',
       format: 'cjs',
       sourcemap: true,
-    paths: path => {
-      if (/^lib0\//.test(path)) {
-        return `lib0/dist${path.slice(4)}.cjs`
-      } else if (/^y-protocols\//.test(path)) {
-        return `y-protocols/dist${path.slice(11)}.cjs`
-      }
-      return path
-    }
+      entryFileNames: '[name].cjs',
+      chunkFileNames: '[name]-[hash].cjs'
     }]
   }
+]