V11 breaking changes (TypeStrong#1760)

* remove node12 stuff

* bump minimum supported TS version to 3.8 to match DT

* install source-map-support in register, not create

* Remove ts.createIncrementalProgram fallback to ts.createEmitAndSemanticDiagnosticsBuilderProgram

* Make enableExperimentalEsmLoaderInterop() on by default; remove conditional code

* Remove deprecated `ts-script` bin

* make bin.ts `main()` export @internal

* change `nodeEval` function signature to accept `context: Context` instead of `: any`

* fix version check

* Add node18 @tsconfig/bases; remove node10 and node12; change dependencies to be wildcard; will respect whatever version you want to use

* More stuff for bumping minimum supported node12 -> node14

* remove test workaround that avoided old bug in node nightly

* fix test failing due to `lib` change in @tsconfig/bases node18

* merge fixes

* fix

.github/workflows/continuous-integration.yml

@@ -51,91 +51,72 @@ jobs:
       matrix:
         os: [ubuntu, windows]
         # Don't forget to add all new flavors to this list!
-        flavor: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]
+        flavor: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
         include:
-          # Node 12.15
-          - flavor: 1
-            node: 12.15
-            nodeFlag: 12_15
-            typescript: latest
-            typescriptFlag: latest
-          # Node 12.16
-          # Earliest version that supports getFormat, etc hooks: https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md#12.16.0
-          - flavor: 2
-            node: 12.16
-            nodeFlag: 12_16
-            typescript: latest
-            typescriptFlag: latest
-          # Node 12
-          - flavor: 3
-            node: 12
-            nodeFlag: 12
-            typescript: latest
-            typescriptFlag: latest
           # Node 14.13.0
           # To test ESM builtin module resolution immediately before a node behavioral change: https://github.com/TypeStrong/ts-node/issues/1130
-          - flavor: 4
+          - flavor: 1
             node: 14.13.0
             nodeFlag: 14_13_0
             typescript: latest
             typescriptFlag: latest
           # Node 14
-          - flavor: 5
+          - flavor: 2
             node: 14
             nodeFlag: 14
             typescript: latest
             typescriptFlag: latest
-          - flavor: 6
+          - flavor: 3
             node: 14
             nodeFlag: 14
-            typescript: 2.7
-            typescriptFlag: 2_7
-          - flavor: 7
+            typescript: 4.0
+            typescriptFlag: 4_0
+          - flavor: 4
             node: 14
             nodeFlag: 14
             typescript: next
             typescriptFlag: next
           # Node 16
           # Node 16.11.1
           # Earliest version that supports old ESM Loader Hooks API: https://github.com/TypeStrong/ts-node/pull/1522
-          - flavor: 8
+          - flavor: 5
             node: 16.11.1
             nodeFlag: 16_11_1
             typescript: latest
             typescriptFlag: latest
-          - flavor: 9
+          - flavor: 6
             node: 16
             nodeFlag: 16
             typescript: latest
             typescriptFlag: latest
             downgradeNpm: true
-          - flavor: 10
+          - flavor: 7
             node: 16
             nodeFlag: 16
-            typescript: 2.7
-            typescriptFlag: 2_7
+            typescript: 4.0
+            typescriptFlag: 4_0
             downgradeNpm: true
-          - flavor: 11
+          - flavor: 8
             node: 16
             nodeFlag: 16
             typescript: next
             typescriptFlag: next
             downgradeNpm: true
           # Node 18
-          - flavor: 12
+          - flavor: 9
             node: 18
             nodeFlag: 18
             typescript: latest
             typescriptFlag: latest
             downgradeNpm: true
-          - flavor: 13
+          - flavor: 10
             node: 18
             nodeFlag: 18
             typescript: next
             typescriptFlag: next
             downgradeNpm: true
           # Node nightly
-          - flavor: 14
+          - flavor: 11
             node: nightly
             nodeFlag: nightly
             typescript: latest

ava.config.cjs

@@ -15,9 +15,7 @@ module.exports = {
     NODE_PATH: ''
   },
   require: ['./src/test/remove-env-var-force-color.js'],
-  nodeArguments: semver.gte(process.version, '14.0.0')
-    ? ['--loader', './src/test/test-loader.mjs', '--no-warnings']
-    : [],
+  nodeArguments: ['--loader', './src/test/test-loader.mjs', '--no-warnings'],
   timeout: '300s',
   concurrency: 1,
 };

dist-raw/README.md

@@ -10,7 +10,7 @@ in a factory function, we will not indent the function body, to avoid whitespace
 
 One obvious problem with this approach: the code has been pulled from one version of node, whereas users of ts-node
 run multiple versions of node.
-Users running node 12 may see that ts-node behaves like node 14, for example.
+Users running node 14 may see that ts-node behaves like node 18, for example.
 
 ## `raw` directory
 

dist-raw/node-internal-modules-cjs-helpers.js

@@ -63,8 +63,7 @@ function addBuiltinLibsToObject(object, dummyModuleName) {
 
     ObjectDefineProperty(object, name, {
       get: () => {
-        // Node 12 hack; remove when we drop node12 support
-        const lib = (dummyModule.require || require)(name);
+        const lib = dummyModule.require(name);
 
         // Disable the current getter/setter and set up a new
         // non-enumerable property.

dist-raw/node-internal-modules-cjs-loader.js

@@ -471,15 +471,11 @@ const Module_resolveFilename = function _resolveFilename(request, parent, isMain
     paths = Module._resolveLookupPaths(request, parent);
   }
 
-  // if (parent?.filename) {
-  // node 12 hack
-  if (parent != null && parent.filename) {
+  if (parent?.filename) {
     if (request[0] === '#') {
       const pkg = readPackageScope(parent.filename) || {};
 
-      // if (pkg.data?.imports != null) {
-      // node 12 hack
-      if (pkg.data != null && pkg.data.imports != null) {
+      if (pkg.data?.imports != null) {
         try {
           return finalizeEsmResolution(
             packageImportsResolve(request, pathToFileURL(parent.filename),
@@ -559,11 +555,15 @@ return {
 /**
  * copied from Module._extensions['.js']
  * https://github.com/nodejs/node/blob/v15.3.0/lib/internal/modules/cjs/loader.js#L1113-L1120
+
+ * Assert that script can be loaded as CommonJS when we attempt to require it.
+ * If it should be loaded as ESM, throw ERR_REQUIRE_ESM like node does.
+ *
  * @param {import('../src/index').Service} service
  * @param {NodeJS.Module} module
  * @param {string} filename
  */
-function assertScriptCanLoadAsCJSImpl(service, module, filename) {
+function assertScriptCanLoadAsCJS(service, module, filename) {
   const pkg = readPackageScope(filename);
 
   // ts-node modification: allow our configuration to override
@@ -588,6 +588,6 @@ function assertScriptCanLoadAsCJSImpl(service, module, filename) {
 
 module.exports = {
   createCjsLoader,
-  assertScriptCanLoadAsCJSImpl,
+  assertScriptCanLoadAsCJS,
   readPackageScope
 };

dist-raw/node-options.js

@@ -30,8 +30,6 @@ function parseArgv(argv) {
     '--preserve-symlinks-main': Boolean,
     '--input-type': String,
     '--experimental-specifier-resolution': String,
-    // Legacy alias for node versions prior to 12.16
-    '--es-module-specifier-resolution': '--experimental-specifier-resolution',
     '--experimental-policy': String,
     '--conditions': [String],
     '--pending-deprecation': Boolean,

node18/tsconfig.json

@@ -0,0 +1,3 @@
+{
+  "extends": "@tsconfig/node18/tsconfig.json"
+}

package.json

@@ -28,19 +28,17 @@
     "./child-loader.mjs": "./child-loader.mjs",
     "./transpilers/swc": "./transpilers/swc.js",
     "./transpilers/swc-experimental": "./transpilers/swc-experimental.js",
-    "./node10/tsconfig.json": "./node10/tsconfig.json",
-    "./node12/tsconfig.json": "./node12/tsconfig.json",
     "./node14/tsconfig.json": "./node14/tsconfig.json",
-    "./node16/tsconfig.json": "./node16/tsconfig.json"
+    "./node16/tsconfig.json": "./node16/tsconfig.json",
+    "./node18/tsconfig.json": "./node18/tsconfig.json"
   },
   "types": "dist/index.d.ts",
   "bin": {
     "ts-node": "dist/bin.js",
     "ts-node-cwd": "dist/bin-cwd.js",
     "ts-node-esm": "dist/bin-esm.js",
     "ts-node-script": "dist/bin-script.js",
-    "ts-node-transpile-only": "dist/bin-transpile.js",
-    "ts-script": "dist/bin-script-deprecated.js"
+    "ts-node-transpile-only": "dist/bin-transpile.js"
   },
   "files": [
     "/transpilers/",
@@ -55,10 +53,9 @@
     "/LICENSE",
     "/tsconfig.schema.json",
     "/tsconfig.schemastore-schema.json",
-    "/node10/",
-    "/node12/",
     "/node14/",
-    "/node16/"
+    "/node16/",
+    "/node18/"
   ],
   "scripts": {
     "lint": "dprint check",
@@ -159,10 +156,9 @@
   },
   "dependencies": {
     "@cspotcode/source-map-support": "^0.8.0",
-    "@tsconfig/node10": "^1.0.7",
-    "@tsconfig/node12": "^1.0.7",
-    "@tsconfig/node14": "^1.0.0",
-    "@tsconfig/node16": "^1.0.2",
+    "@tsconfig/node14": "*",
+    "@tsconfig/node16": "*",
+    "@tsconfig/node18": "*",
     "acorn": "^8.4.1",
     "acorn-walk": "^8.1.1",
     "arg": "^4.1.0",

src/bin.ts

@@ -39,6 +39,8 @@ import { findAndReadConfig } from './configuration';
  *
  * The functions are intentionally given uncreative names and left in the same order as the original code, to make a
  * smaller git diff.
+ *
+ * @internal
  */
 export function main(
   argv: string[] = process.argv.slice(2),
@@ -97,19 +99,6 @@ export function bootstrap(state: BootstrapState) {
 
 function parseArgv(argv: string[], entrypointArgs: Record<string, any>) {
   arg ??= require('arg');
-  // HACK: technically, this function is not marked @internal so it's possible
-  // that libraries in the wild are doing `require('ts-node/dist/bin').main({'--transpile-only': true})`
-  // We can mark this function @internal in next major release.
-  // For now, rewrite args to avoid a breaking change.
-  entrypointArgs = { ...entrypointArgs };
-  for (const key of Object.keys(entrypointArgs)) {
-    entrypointArgs[
-      key.replace(
-        /([a-z])-([a-z])/g,
-        (_$0, $1, $2: string) => `${$1}${$2.toUpperCase()}`
-      )
-    ] = entrypointArgs[key];
-  }
 
   const args = {
     ...entrypointArgs,
@@ -742,13 +731,6 @@ let guaranteedNonexistentDirectorySuffix = 0;
  * https://stackoverflow.com/questions/59865584/how-to-invalidate-cached-require-resolve-results
  */
 function requireResolveNonCached(absoluteModuleSpecifier: string) {
-  // node <= 12.1.x fallback: The trick below triggers a node bug on old versions.
-  // On these old versions, pollute the require cache instead. This is a deliberate
-  // ts-node limitation that will *rarely* manifest, and will not matter once node 12
-  // is end-of-life'd on 2022-04-30
-  const isSupportedNodeVersion = versionGteLt(process.versions.node, '12.2.0');
-  if (!isSupportedNodeVersion) return require.resolve(absoluteModuleSpecifier);
-
   const { dir, base } = parsePath(absoluteModuleSpecifier);
   const relativeModuleSpecifier = `./${base}`;
 

src/child/spawn-child.ts

@@ -1,7 +1,6 @@
 import type { BootstrapState } from '../bin';
 import { spawn } from 'child_process';
 import { pathToFileURL } from 'url';
-import { versionGteLt } from '../util';
 import { argPrefix, compress } from './argv-payload';
 
 /**
@@ -11,11 +10,6 @@ import { argPrefix, compress } from './argv-payload';
  *   the child process.
  */
 export function callInChild(state: BootstrapState) {
-  if (!versionGteLt(process.versions.node, '12.17.0')) {
-    throw new Error(
-      '`ts-node-esm` and `ts-node --esm` require node version 12.17.0 or newer.'
-    );
-  }
   const child = spawn(
     process.execPath,
     [

src/esm.ts

@@ -119,8 +119,6 @@ export function registerAndCreateEsmHooks(opts?: RegisterOptions) {
 }
 
 export function createEsmHooks(tsNodeService: Service) {
-  tsNodeService.enableExperimentalEsmLoaderInterop();
-
   // Custom implementation that considers additional file extensions and automatically adds file extensions
   const nodeResolveImplementation = tsNodeService.getNodeEsmResolver();
   const nodeGetFormatImplementation = tsNodeService.getNodeEsmGetFormat();