Build and publish ES module build

.gitignore

@@ -2,9 +2,11 @@
 docs/_site
 docs/vendor
 dist/*
+dist-*/*
 node_modules/
-test/workers/*.js
+test/rollup/dist/
 test/webpack/dist*
+test/workers/*.js
 .DS_Store
 Thumbs.db
 *.log

observable.mjs

@@ -0,0 +1 @@
+export * from "./dist-esm/observable"

package.json

@@ -3,16 +3,25 @@
   "version": "1.0.0-beta.9",
   "description": "Easy to use, yet powerful multi-threading library for node.js, web browsers and Electron",
   "main": "dist/index.js",
+  "module": "dist-esm/index.js",
   "scripts": {
-    "prebuild": "rimraf dist/",
-    "build": "tsc",
+    "prebuild": "rimraf dist/ dist-esm/",
+    "build": "run-p build:cjs build:es",
+    "build:cjs": "tsc -p tsconfig.json",
+    "build:es": "tsc -p tsconfig-esm.json",
     "test": "run-s test:ava test:puppeteer:basic test:puppeteer:webpack",
     "test:ava": "cross-env TS_NODE_FILES=true ava",
     "test:puppeteer:basic": "puppet-run --plugin=mocha --bundle=./test/workers/:/workers/ ./test/*.chromium*.ts",
     "test:puppeteer:webpack": "puppet-run --serve ./test/webpack/dist.web/0.worker.js --serve ./test/webpack/dist.web/1.worker.js --plugin=mocha ./test/webpack/webpack.chromium.mocha.ts",
     "posttest": "tslint --project .",
     "prepare": "run-s build"
   },
+  "sideEffects": [
+    "./dist*/master/register.js",
+    "./dist*/worker/index.js",
+    "./register.*js",
+    "./worker.*js"
+  ],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/andywer/threads.js.git"
@@ -40,32 +49,32 @@
     "observable-fns": "^0.5.0"
   },
   "devDependencies": {
-    "@babel/cli": "^7.4.4",
-    "@babel/plugin-transform-modules-commonjs": "^7.4.4",
-    "@babel/plugin-transform-typescript": "^7.4.4",
-    "@types/callsites": "^3.0.0",
     "@types/chai": "^4.1.7",
     "@types/debug": "^4.1.4",
     "@types/execa": "^0.9.0",
     "@types/mocha": "^5.2.6",
     "@types/node": "^11.13.8",
     "@types/webpack": "^4.4.32",
-    "ava": "^1.4.1",
+    "ava": "^2.4.0",
     "chai": "^4.2.0",
     "cross-env": "^5.2.0",
-    "execa": "^2.0.3",
+    "execa": "^3.4.0",
     "mocha": "^5.2.0",
     "npm-run-all": "^4.1.5",
     "puppet-run": "^0.10.0-alpha",
     "puppet-run-plugin-mocha": "^0.10.0-alpha",
     "rimraf": "^2.6.3",
+    "rollup": "^1.16.2",
+    "rollup-plugin-commonjs": "^10.0.1",
+    "rollup-plugin-node-resolve": "^5.1.0",
     "threads-plugin": "^1.2.0",
     "tiny-worker": "^2.2.0",
     "ts-loader": "^6.0.1",
     "ts-node": "^8.1.0",
     "tslint": "^5.16.0",
     "tslint-config-prettier": "^1.18.0",
     "typescript": "^3.4.5",
+    "wavy": "^1.0.4",
     "webpack": "^4.32.2",
     "worker-plugin": "^3.1.0"
   },
@@ -91,14 +100,16 @@
     "ts-node": false,
     "ts-node/register": false,
     "worker_threads": false,
-    "./dist/master/implementation": "./dist/master/implementation.browser.js",
     "./dist/master/implementation.node.js": false,
-    "./dist/worker/implementation": "./dist/worker/implementation.browser.js",
     "./dist/worker/implementation.tiny-worker.js": false,
-    "./dist/worker/implementation.worker_threads.js": false
+    "./dist/worker/implementation.worker_threads.js": false,
+    "./dist-esm/master/implementation.node.js": false,
+    "./dist-esm/worker/implementation.tiny-worker.js": false,
+    "./dist-esm/worker/implementation.worker_threads.js": false
   },
   "files": [
     "dist/**",
+    "dist-esm/**",
     "*.js",
     "*.ts"
   ]

register.mjs

@@ -0,0 +1 @@
+export * from "./dist-esm/master/register"

src/master/implementation.browser.ts

@@ -3,7 +3,9 @@
 import { ThreadsWorkerOptions, WorkerImplementation } from "../types/master"
 import { getBundleURL } from "./get-bundle-url.browser"
 
-const defaultPoolSize = navigator.hardwareConcurrency || 4
+export const defaultPoolSize = typeof navigator !== "undefined" && navigator.hardwareConcurrency
+  ? navigator.hardwareConcurrency
+  : 4
 
 const isAbsoluteURL = (value: string) => /^(file|https?:)?\/\//i.test(value)
 
@@ -16,7 +18,7 @@ function createSourceBlobURL(code: string): string {
 }
 
 
-function selectWorkerImplementation(): typeof WorkerImplementation {
+export function selectWorkerImplementation(): typeof WorkerImplementation {
   if (typeof Worker === "undefined") {
     // Might happen on Safari, for instance
     // The idea is to only fail if the constructor is actually used
@@ -44,8 +46,3 @@ function selectWorkerImplementation(): typeof WorkerImplementation {
     }
   }
 }
-
-export default {
-  defaultPoolSize,
-  selectWorkerImplementation
-}

src/master/implementation.node.ts

@@ -11,7 +11,8 @@ declare const __non_webpack_require__: typeof require
 type WorkerEventName = "error" | "message"
 
 let tsNodeAvailable: boolean | undefined
-const defaultPoolSize = cpus().length
+
+export const defaultPoolSize = cpus().length
 
 function detectTsNode() {
   if (typeof __non_webpack_require__ === "function") {
@@ -167,7 +168,7 @@ function initTinyWorker(): typeof WorkerImplementation {
   return Worker as any
 }
 
-function selectWorkerImplementation(): typeof WorkerImplementation {
+export function selectWorkerImplementation(): typeof WorkerImplementation {
   try {
     return initWorkerThreadsWorker()
   } catch(error) {
@@ -176,8 +177,3 @@ function selectWorkerImplementation(): typeof WorkerImplementation {
     return initTinyWorker()
   }
 }
-
-export default {
-  defaultPoolSize,
-  selectWorkerImplementation
-}

src/master/implementation.ts

@@ -1,15 +1,16 @@
-// tslint:disable no-var-requires
 /*
  * This file is only a stub to make './implementation' resolve to the right module.
  */
 
-import { WorkerImplementation } from "../types/master"
+// We alias `src/master/implementation` to `src/master/implementation.browser` for web
+// browsers already in the package.json, so if get here, it's safe to pass-through the
+// node implementation
 
-interface ImplementationExports {
-  defaultPoolSize: number
-  selectWorkerImplementation(): typeof WorkerImplementation
-}
+import * as BrowserImplementation from "./implementation.browser"
+import * as NodeImplementation from "./implementation.node"
 
-export default typeof process !== 'undefined' && process.arch !== 'browser' && 'pid' in process
-  ? require('./implementation.node').default as ImplementationExports
-  : require('./implementation.browser').default as ImplementationExports
+const runningInNode = typeof process !== 'undefined' && process.arch !== 'browser' && 'pid' in process
+const implementation = runningInNode ? NodeImplementation : BrowserImplementation
+
+export const defaultPoolSize = implementation.defaultPoolSize
+export const selectWorkerImplementation = implementation.selectWorkerImplementation

src/master/index.ts

@@ -1,5 +1,5 @@
 import { Worker as WorkerType } from "../types/master"
-import Implementation from "./implementation"
+import { selectWorkerImplementation } from "./implementation"
 
 export { FunctionThread, ModuleThread } from "../types/master"
 export { Pool } from "./pool"
@@ -9,4 +9,4 @@ export { Thread } from "./thread"
 export type Worker = WorkerType
 
 /** Worker implementation. Either web worker or a node.js Worker class. */
-export const Worker = Implementation.selectWorkerImplementation()
+export const Worker = selectWorkerImplementation()

src/master/pool.ts

@@ -1,6 +1,6 @@
 import DebugLogger from "debug"
 import { multicast, Observable, Subject } from "observable-fns"
-import Implementation from "./implementation"
+import { defaultPoolSize } from "./implementation"
 import {
   PoolEvent,
   PoolEventType,
@@ -120,7 +120,7 @@ class WorkerPool<ThreadType extends Thread> implements Pool<ThreadType> {
       ? { size: optionsOrSize }
       : optionsOrSize || {}
 
-    const { size = Implementation.defaultPoolSize } = options
+    const { size = defaultPoolSize } = options
 
     this.debug = DebugLogger(`threads:pool:${slugify(options.name || String(nextPoolID++))}`)
     this.options = options

src/master/spawn.ts

@@ -20,11 +20,11 @@ import { WorkerFunction, WorkerModule } from "../types/worker"
 import { createProxyFunction, createProxyModule } from "./invocation-proxy"
 
 type ArbitraryWorkerInterface = WorkerFunction & WorkerModule<string> & { somekeythatisneverusedinproductioncode123: "magicmarker123" }
-type ArbitraryFunctionOrModuleThread = FunctionThread<any, any> & ModuleThread<any>
+type ArbitraryThreadType = FunctionThread<any, any> & ModuleThread<any>
 
 type ExposedToThreadType<Exposed extends WorkerFunction | WorkerModule<any>> =
   Exposed extends ArbitraryWorkerInterface
-  ? ArbitraryFunctionOrModuleThread
+  ? ArbitraryThreadType
   : Exposed extends WorkerFunction
   ? FunctionThread<Parameters<Exposed>, StripAsync<ReturnType<Exposed>>>
   : Exposed extends WorkerModule<any>

src/worker/implementation.ts

@@ -4,15 +4,21 @@
  */
 
 import { AbstractedWorkerAPI } from "../types/worker"
+import WebWorkerImplementation from "./implementation.browser"
+import TinyWorkerImplementation from "./implementation.tiny-worker"
+import WorkerThreadsImplementation from "./implementation.worker_threads"
+
+const runningInNode = typeof process !== 'undefined' && process.arch !== 'browser' && 'pid' in process
 
 function selectNodeImplementation(): AbstractedWorkerAPI {
   try {
-    return require("./implementation.worker_threads").default
+    WorkerThreadsImplementation.testImplementation()
+    return WorkerThreadsImplementation
   } catch (error) {
-    return require("./implementation.tiny-worker").default
+    return TinyWorkerImplementation
   }
 }
 
-export default typeof process !== 'undefined' && process.arch !== 'browser' && 'pid' in process
+export default runningInNode
   ? selectNodeImplementation()
-  : require('./implementation.browser').default as AbstractedWorkerAPI
+  : WebWorkerImplementation

src/worker/implementation.worker_threads.ts

@@ -1,7 +1,7 @@
 // tslint:disable no-shadowed-variable
 import { MessagePort } from "worker_threads"
 import { AbstractedWorkerAPI } from "../types/worker"
-import * as WorkerThreads from "../worker_threads"
+import WorkerThreads from "../worker_threads"
 
 function assertMessagePort(port: MessagePort | null | undefined): MessagePort {
   if (!port) {
@@ -11,29 +11,37 @@ function assertMessagePort(port: MessagePort | null | undefined): MessagePort {
 }
 
 const isWorkerRuntime: AbstractedWorkerAPI["isWorkerRuntime"] = function isWorkerRuntime() {
-  return !WorkerThreads.isMainThread
+  return !WorkerThreads().isMainThread
 }
 
 const postMessageToMaster: AbstractedWorkerAPI["postMessageToMaster"] = function postMessageToMaster(data, transferList) {
-  assertMessagePort(WorkerThreads.parentPort).postMessage(data, transferList as any)
+  assertMessagePort(WorkerThreads().parentPort).postMessage(data, transferList as any)
 }
 
 const subscribeToMasterMessages: AbstractedWorkerAPI["subscribeToMasterMessages"] = function subscribeToMasterMessages(onMessage) {
-  if (!WorkerThreads.parentPort) {
+  const parentPort = WorkerThreads().parentPort
+
+  if (!parentPort) {
     throw Error("Invariant violation: MessagePort to parent is not available.")
   }
   const messageHandler = (message: any) => {
     onMessage(message)
   }
   const unsubscribe = () => {
-    assertMessagePort(WorkerThreads.parentPort).off("message", messageHandler)
+    assertMessagePort(parentPort).off("message", messageHandler)
   }
-  assertMessagePort(WorkerThreads.parentPort).on("message", messageHandler)
+  assertMessagePort(parentPort).on("message", messageHandler)
   return unsubscribe
 }
 
+function testImplementation() {
+  // Will throw if `worker_threads` are not available
+  WorkerThreads()
+}
+
 export default {
   isWorkerRuntime,
   postMessageToMaster,
-  subscribeToMasterMessages
+  subscribeToMasterMessages,
+  testImplementation
 }

src/worker_threads.ts

@@ -3,10 +3,26 @@
 
 declare function __non_webpack_require__(module: string): any
 
-const workerThreads = typeof __non_webpack_require__ === "function"
-  ? __non_webpack_require__("worker_threads")
-  : eval("require")("worker_threads")
+// FIXME
+type MessagePort = any
 
-export const MessagePort = workerThreads.MessagePort
-export const isMainThread = workerThreads.isMainThread
-export const parentPort = workerThreads.parentPort
+interface WorkerThreadsModule {
+  MessagePort: typeof MessagePort
+  isMainThread: boolean
+  parentPort: MessagePort
+}
+
+let implementation: WorkerThreadsModule | undefined
+
+function selectImplementation(): WorkerThreadsModule {
+  return typeof __non_webpack_require__ === "function"
+    ? __non_webpack_require__("worker_threads")
+    : eval("require")("worker_threads")
+}
+
+export default function getImplementation(): WorkerThreadsModule {
+  if (!implementation) {
+    implementation = selectImplementation()
+  }
+  return implementation
+}