lib: restructure cjs and esm loaders

Create `lib/internal/modules` and restructure the module loaders
to make the purpose of those files clearer.

Also make it clear in the code that the object exported by
`lib/internal/modules/cjs/loader.js` is `CJSModule` instead of the
ambiguous `Module`.

Before:

```
lib
├── ...
├── internal
│       ├── loaders
│       │     ├── CreateDynamicModule.js
│       │     ├── DefaultResolve.js
│       │     ├── Loader.js
│       │     ├── ModuleJob.js
│       │     ├── ModuleMap.js
│       │     └── Translators.js
│       └── module.js
└── module.js
```

After:

```
lib
├── ...
├── internal
│       ├── ...
│       └── modules
│              ├── cjs
│              │     ├── helpers.js
│              │     └── loader.js
│              └── esm
│                    ├── CreateDynamicModule.js
│                    ├── DefaultResolve.js
│                    ├── Loader.js
│                    ├── ModuleJob.js
│                    ├── ModuleMap.js
│                    └── Translators.js
└── module.js # deleted in this commit to work with git file mode
```

PR-URL: https://github.com/nodejs/node/pull/19177
Refs: https://github.com/nodejs/node/pull/19112
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

lib/internal/bootstrap/loaders.js

@@ -1,6 +1,7 @@
 // This file creates the internal module & binding loaders used by built-in
 // modules. In contrast, user land modules are loaded using
-// lib/module.js (CommonJS Modules) or lib/internal/loader/* (ES Modules).
+// lib/internal/modules/cjs/loader.js (CommonJS Modules) or
+// lib/internal/modules/esm/* (ES Modules).
 //
 // This file is compiled and run by node.cc before bootstrap/node.js
 // was called, therefore the loaders are bootstraped before we start to

lib/internal/bootstrap/node.js

@@ -112,7 +112,7 @@
       process.emitWarning(
         'The ESM module loader is experimental.',
         'ExperimentalWarning', undefined);
-      NativeModule.require('internal/process/modules').setup();
+      NativeModule.require('internal/process/esm_loader').setup();
     }
 
     {
@@ -194,8 +194,10 @@
         preloadModules();
         perf.markMilestone(NODE_PERFORMANCE_MILESTONE_PRELOAD_MODULE_LOAD_END);
 
-        const internalModule = NativeModule.require('internal/module');
-        internalModule.addBuiltinLibsToObject(global);
+        const {
+          addBuiltinLibsToObject
+        } = NativeModule.require('internal/modules/cjs/helpers');
+        addBuiltinLibsToObject(global);
         evalScript('[eval]');
       } else if (process.argv[1] && process.argv[1] !== '-') {
         perf.markMilestone(NODE_PERFORMANCE_MILESTONE_MODULE_LOAD_START);
@@ -203,13 +205,13 @@
         const path = NativeModule.require('path');
         process.argv[1] = path.resolve(process.argv[1]);
 
-        const Module = NativeModule.require('module');
+        const CJSModule = NativeModule.require('internal/modules/cjs/loader');
 
         // check if user passed `-c` or `--check` arguments to Node.
         if (process._syntax_check_only != null) {
           const fs = NativeModule.require('fs');
           // read the source
-          const filename = Module._resolveFilename(process.argv[1]);
+          const filename = CJSModule._resolveFilename(process.argv[1]);
           const source = fs.readFileSync(filename, 'utf-8');
           checkScriptSyntax(source, filename);
           process.exit(0);
@@ -220,7 +222,7 @@
         preloadModules();
         perf.markMilestone(
           NODE_PERFORMANCE_MILESTONE_PRELOAD_MODULE_LOAD_END);
-        Module.runMain();
+        CJSModule.runMain();
       } else {
         perf.markMilestone(NODE_PERFORMANCE_MILESTONE_MODULE_LOAD_START);
         perf.markMilestone(NODE_PERFORMANCE_MILESTONE_MODULE_LOAD_END);
@@ -345,7 +347,7 @@
 
   function setupGlobalConsole() {
     const originalConsole = global.console;
-    const Module = NativeModule.require('module');
+    const CJSModule = NativeModule.require('internal/modules/cjs/loader');
     // Setup Node.js global.console
     const wrappedConsole = NativeModule.require('console');
     Object.defineProperty(global, 'console', {
@@ -353,7 +355,7 @@
       enumerable: false,
       value: wrappedConsole
     });
-    setupInspector(originalConsole, wrappedConsole, Module);
+    setupInspector(originalConsole, wrappedConsole, CJSModule);
   }
 
   function setupGlobalURL() {
@@ -374,19 +376,20 @@
     });
   }
 
-  function setupInspector(originalConsole, wrappedConsole, Module) {
+  function setupInspector(originalConsole, wrappedConsole, CJSModule) {
     if (!process.config.variables.v8_enable_inspector) {
       return;
     }
     const { addCommandLineAPI, consoleCall } = process.binding('inspector');
     // Setup inspector command line API
-    const { makeRequireFunction } = NativeModule.require('internal/module');
+    const { makeRequireFunction } =
+      NativeModule.require('internal/modules/cjs/helpers');
     const path = NativeModule.require('path');
     const cwd = tryGetCwd(path);
 
-    const consoleAPIModule = new Module('<inspector console>');
+    const consoleAPIModule = new CJSModule('<inspector console>');
     consoleAPIModule.paths =
-        Module._nodeModulePaths(cwd).concat(Module.globalPaths);
+        CJSModule._nodeModulePaths(cwd).concat(CJSModule.globalPaths);
     addCommandLineAPI('require', makeRequireFunction(consoleAPIModule));
     const config = {};
     for (const key of Object.keys(wrappedConsole)) {
@@ -515,13 +518,13 @@
   }
 
   function evalScript(name) {
-    const Module = NativeModule.require('module');
+    const CJSModule = NativeModule.require('internal/modules/cjs/loader');
     const path = NativeModule.require('path');
     const cwd = tryGetCwd(path);
 
-    const module = new Module(name);
+    const module = new CJSModule(name);
     module.filename = path.join(cwd, name);
-    module.paths = Module._nodeModulePaths(cwd);
+    module.paths = CJSModule._nodeModulePaths(cwd);
     const body = wrapForBreakOnFirstLine(process._eval);
     const script = `global.__filename = ${JSON.stringify(name)};\n` +
                    'global.exports = exports;\n' +
@@ -540,21 +543,26 @@
   // Load preload modules
   function preloadModules() {
     if (process._preload_modules) {
-      NativeModule.require('module')._preloadModules(process._preload_modules);
+      const {
+        _preloadModules
+      } = NativeModule.require('internal/modules/cjs/loader');
+      _preloadModules(process._preload_modules);
     }
   }
 
   function checkScriptSyntax(source, filename) {
-    const Module = NativeModule.require('module');
+    const CJSModule = NativeModule.require('internal/modules/cjs/loader');
     const vm = NativeModule.require('vm');
-    const internalModule = NativeModule.require('internal/module');
+    const {
+      stripShebang, stripBOM
+    } = NativeModule.require('internal/modules/cjs/helpers');
 
     // remove Shebang
-    source = internalModule.stripShebang(source);
+    source = stripShebang(source);
     // remove BOM
-    source = internalModule.stripBOM(source);
+    source = stripBOM(source);
     // wrap it
-    source = Module.wrap(source);
+    source = CJSModule.wrap(source);
     // compile the script, this will throw if it fails
     new vm.Script(source, { displayErrors: true, filename });
   }

lib/internal/modules/cjs/loader.js

@@ -35,7 +35,12 @@ const {
   internalModuleStat
 } = process.binding('fs');
 const { safeGetenv } = process.binding('util');
-const internalModule = require('internal/module');
+const {
+  makeRequireFunction,
+  requireDepth,
+  stripBOM,
+  stripShebang
+} = require('internal/modules/cjs/helpers');
 const preserveSymlinks = !!process.binding('config').preserveSymlinks;
 const experimentalModules = !!process.binding('config').experimentalModules;
 
@@ -48,9 +53,9 @@ const {
 module.exports = Module;
 
 // these are below module.exports for the circular reference
-const internalESModule = require('internal/process/modules');
-const ModuleJob = require('internal/loader/ModuleJob');
-const createDynamicModule = require('internal/loader/CreateDynamicModule');
+const asyncESM = require('internal/process/esm_loader');
+const ModuleJob = require('internal/modules/esm/ModuleJob');
+const createDynamicModule = require('internal/modules/esm/CreateDynamicModule');
 const {
   CHAR_UPPERCASE_A,
   CHAR_LOWERCASE_A,
@@ -477,7 +482,7 @@ Module._load = function(request, parent, isMain) {
   }
 
   if (experimentalModules && isMain) {
-    internalESModule.loaderPromise.then((loader) => {
+    asyncESM.loaderPromise.then((loader) => {
       return loader.import(getURLFromFilePath(request).pathname);
     })
     .catch((e) => {
@@ -583,7 +588,7 @@ Module.prototype.load = function(filename) {
   this.loaded = true;
 
   if (experimentalModules) {
-    const ESMLoader = internalESModule.ESMLoader;
+    const ESMLoader = asyncESM.ESMLoader;
     const url = getURLFromFilePath(filename);
     const urlString = `${url}`;
     const exports = this.exports;
@@ -631,7 +636,7 @@ var resolvedArgv;
 // Returns exception, if any.
 Module.prototype._compile = function(content, filename) {
 
-  content = internalModule.stripShebang(content);
+  content = stripShebang(content);
 
   // create wrapper function
   var wrapper = Module.wrap(content);
@@ -660,8 +665,8 @@ Module.prototype._compile = function(content, filename) {
     }
   }
   var dirname = path.dirname(filename);
-  var require = internalModule.makeRequireFunction(this);
-  var depth = internalModule.requireDepth;
+  var require = makeRequireFunction(this);
+  var depth = requireDepth;
   if (depth === 0) stat.cache = new Map();
   var result;
   if (inspectorWrapper) {
@@ -679,7 +684,7 @@ Module.prototype._compile = function(content, filename) {
 // Native extension for .js
 Module._extensions['.js'] = function(module, filename) {
   var content = fs.readFileSync(filename, 'utf8');
-  module._compile(internalModule.stripBOM(content), filename);
+  module._compile(stripBOM(content), filename);
 };
 
 
@@ -687,7 +692,7 @@ Module._extensions['.js'] = function(module, filename) {
 Module._extensions['.json'] = function(module, filename) {
   var content = fs.readFileSync(filename, 'utf8');
   try {
-    module.exports = JSON.parse(internalModule.stripBOM(content));
+    module.exports = JSON.parse(stripBOM(content));
   } catch (err) {
     err.message = filename + ': ' + err.message;
     throw err;

lib/internal/modules/esm/DefaultResolve.js

@@ -1,7 +1,7 @@
 'use strict';
 
 const { URL } = require('url');
-const CJSmodule = require('module');
+const CJSmodule = require('internal/modules/cjs/loader');
 const internalFS = require('internal/fs');
 const { NativeModule, internalBinding } = require('internal/bootstrap/loaders');
 const { extname } = require('path');

lib/internal/modules/esm/Loader.js

@@ -6,11 +6,11 @@ const {
   ERR_MISSING_DYNAMIC_INTSTANTIATE_HOOK,
   ERR_UNKNOWN_MODULE_FORMAT
 } = require('internal/errors').codes;
-const ModuleMap = require('internal/loader/ModuleMap');
-const ModuleJob = require('internal/loader/ModuleJob');
-const defaultResolve = require('internal/loader/DefaultResolve');
-const createDynamicModule = require('internal/loader/CreateDynamicModule');
-const translators = require('internal/loader/Translators');
+const ModuleMap = require('internal/modules/esm/ModuleMap');
+const ModuleJob = require('internal/modules/esm/ModuleJob');
+const defaultResolve = require('internal/modules/esm/DefaultResolve');
+const createDynamicModule = require('internal/modules/esm/CreateDynamicModule');
+const translators = require('internal/modules/esm/Translators');
 
 const FunctionBind = Function.call.bind(Function.prototype.bind);
 

lib/internal/modules/esm/ModuleMap.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const ModuleJob = require('internal/loader/ModuleJob');
+const ModuleJob = require('internal/modules/esm/ModuleJob');
 const { SafeMap } = require('internal/safe_globals');
 const debug = require('util').debuglog('esm');
 const { ERR_INVALID_ARG_TYPE } = require('internal/errors').codes;

lib/internal/modules/esm/Translators.js

@@ -2,10 +2,13 @@
 
 const { NativeModule, internalBinding } = require('internal/bootstrap/loaders');
 const { ModuleWrap } = internalBinding('module_wrap');
-const internalCJSModule = require('internal/module');
-const CJSModule = require('module');
+const {
+  stripShebang,
+  stripBOM
+} = require('internal/modules/cjs/helpers');
+const CJSModule = require('internal/modules/cjs/loader');
 const internalURLModule = require('internal/url');
-const createDynamicModule = require('internal/loader/CreateDynamicModule');
+const createDynamicModule = require('internal/modules/esm/CreateDynamicModule');
 const fs = require('fs');
 const { _makeLong } = require('path');
 const { SafeMap } = require('internal/safe_globals');
@@ -24,7 +27,7 @@ translators.set('esm', async (url) => {
   const source = `${await readFileAsync(new URL(url))}`;
   debug(`Translating StandardModule ${url}`);
   return {
-    module: new ModuleWrap(internalCJSModule.stripShebang(source), url),
+    module: new ModuleWrap(stripShebang(source), url),
     reflect: undefined
   };
 });
@@ -82,7 +85,7 @@ translators.set('json', async (url) => {
     const pathname = internalURLModule.getPathFromURL(new URL(url));
     const content = readFileSync(pathname, 'utf8');
     try {
-      const exports = JsonParse(internalCJSModule.stripBOM(content));
+      const exports = JsonParse(stripBOM(content));
       reflect.exports.default.set(exports);
     } catch (err) {
       err.message = pathname + ': ' + err.message;

lib/internal/process/esm_loader.js

@@ -7,7 +7,7 @@ const {
 } = internalBinding('module_wrap');
 
 const { getURLFromFilePath } = require('internal/url');
-const Loader = require('internal/loader/Loader');
+const Loader = require('internal/modules/esm/Loader');
 const path = require('path');
 const { URL } = require('url');
 

lib/repl.js

@@ -42,7 +42,11 @@
 
 'use strict';
 
-const internalModule = require('internal/module');
+const {
+  builtinLibs,
+  makeRequireFunction,
+  addBuiltinLibsToObject
+} = require('internal/modules/cjs/helpers');
 const { processTopLevelAwait } = require('internal/repl/await');
 const internalUtil = require('internal/util');
 const { isTypedArray } = require('internal/util/types');
@@ -55,7 +59,7 @@ const path = require('path');
 const fs = require('fs');
 const { Interface } = require('readline');
 const { Console } = require('console');
-const Module = require('module');
+const CJSModule = require('internal/modules/cjs/loader');
 const domain = require('domain');
 const debug = util.debuglog('repl');
 const {
@@ -96,7 +100,7 @@ try {
 }
 
 // Hack for repl require to work properly with node_modules folders
-module.paths = Module._nodeModulePaths(module.filename);
+module.paths = CJSModule._nodeModulePaths(module.filename);
 
 // If obj.hasOwnProperty has been overridden, then calling
 // obj.hasOwnProperty(prop) will break.
@@ -112,7 +116,7 @@ writer.options = Object.assign({},
                                util.inspect.defaultOptions,
                                { showProxy: true, depth: 2 });
 
-exports._builtinLibs = internalModule.builtinLibs;
+exports._builtinLibs = builtinLibs;
 
 function REPLServer(prompt,
                     stream,
@@ -789,14 +793,15 @@ REPLServer.prototype.createContext = function() {
     }
   }
 
-  var module = new Module('<repl>');
-  module.paths = Module._resolveLookupPaths('<repl>', parentModule, true) || [];
+  var module = new CJSModule('<repl>');
+  module.paths =
+    CJSModule._resolveLookupPaths('<repl>', parentModule, true) || [];
 
-  var require = internalModule.makeRequireFunction(module);
+  var require = makeRequireFunction(module);
   context.module = module;
   context.require = require;
 
-  internalModule.addBuiltinLibsToObject(context);
+  addBuiltinLibsToObject(context);
 
   return context;
 };
@@ -1005,7 +1010,7 @@ function complete(line, callback) {
     } else if (/^\.\.?\//.test(completeOn)) {
       paths = [process.cwd()];
     } else {
-      paths = module.paths.concat(Module.globalPaths);
+      paths = module.paths.concat(CJSModule.globalPaths);
     }
 
     for (i = 0; i < paths.length; i++) {

node.gyp

@@ -104,17 +104,18 @@
       'lib/internal/http.js',
       'lib/internal/inspector_async_hook.js',
       'lib/internal/linkedlist.js',
-      'lib/internal/loader/Loader.js',
-      'lib/internal/loader/CreateDynamicModule.js',
-      'lib/internal/loader/DefaultResolve.js',
-      'lib/internal/loader/ModuleJob.js',
-      'lib/internal/loader/ModuleMap.js',
-      'lib/internal/loader/Translators.js',
+      'lib/internal/modules/cjs/helpers.js',
+      'lib/internal/modules/cjs/loader.js',
+      'lib/internal/modules/esm/Loader.js',
+      'lib/internal/modules/esm/CreateDynamicModule.js',
+      'lib/internal/modules/esm/DefaultResolve.js',
+      'lib/internal/modules/esm/ModuleJob.js',
+      'lib/internal/modules/esm/ModuleMap.js',
+      'lib/internal/modules/esm/Translators.js',
       'lib/internal/safe_globals.js',
       'lib/internal/net.js',
-      'lib/internal/module.js',
       'lib/internal/os.js',
-      'lib/internal/process/modules.js',
+      'lib/internal/process/esm_loader.js',
       'lib/internal/process/next_tick.js',
       'lib/internal/process/promises.js',
       'lib/internal/process/stdio.js',

test/es-module/test-esm-loader-modulemap.js

@@ -7,10 +7,10 @@
 const common = require('../common');
 
 const { URL } = require('url');
-const Loader = require('internal/loader/Loader');
-const ModuleMap = require('internal/loader/ModuleMap');
-const ModuleJob = require('internal/loader/ModuleJob');
-const createDynamicModule = require('internal/loader/CreateDynamicModule');
+const Loader = require('internal/modules/esm/Loader');
+const ModuleMap = require('internal/modules/esm/ModuleMap');
+const ModuleJob = require('internal/modules/esm/ModuleJob');
+const createDynamicModule = require('internal/modules/esm/CreateDynamicModule');
 
 const stubModuleUrl = new URL('file://tmp/test');
 const stubModule = createDynamicModule(['default'], stubModuleUrl);

test/es-module/test-esm-loader-search.js

@@ -5,7 +5,7 @@
 
 const common = require('../common');
 
-const { search } = require('internal/loader/DefaultResolve');
+const { search } = require('internal/modules/esm/DefaultResolve');
 
 common.expectsError(
   () => search('target', undefined),

test/fixtures/module-require-depth/one.js

@@ -1,9 +1,11 @@
 // Flags: --expose_internals
 'use strict';
 const assert = require('assert');
-const internalModule = require('internal/module');
+const {
+  requireDepth
+} = require('internal/modules/cjs/helpers');
 
-exports.requireDepth = internalModule.requireDepth;
-assert.strictEqual(internalModule.requireDepth, 1);
+exports.requireDepth = requireDepth;
+assert.strictEqual(requireDepth, 1);
 assert.deepStrictEqual(require('./two'), { requireDepth: 2 });
-assert.strictEqual(internalModule.requireDepth, 1);
+assert.strictEqual(requireDepth, 1);

test/fixtures/module-require-depth/two.js

@@ -1,9 +1,11 @@
 // Flags: --expose_internals
 'use strict';
 const assert = require('assert');
-const internalModule = require('internal/module');
+const {
+  requireDepth
+} = require('internal/modules/cjs/helpers');
 
-exports.requireDepth = internalModule.requireDepth;
-assert.strictEqual(internalModule.requireDepth, 2);
+exports.requireDepth = requireDepth;
+assert.strictEqual(requireDepth, 2);
 assert.deepStrictEqual(require('./one'), { requireDepth: 1 });
-assert.strictEqual(internalModule.requireDepth, 2);
+assert.strictEqual(requireDepth, 2);

test/message/core_line_numbers.out

@@ -6,10 +6,10 @@ RangeError: Invalid input
     at error (punycode.js:42:*)
     at Object.decode (punycode.js:*:*)
     at Object.<anonymous> (*test*message*core_line_numbers.js:*:*)
-    at Module._compile (module.js:*:*)
-    at Object.Module._extensions..js (module.js:*:*)
-    at Module.load (module.js:*:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*:*)
-    at Function.Module.runMain (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*:*)
+    at Module.load (internal/modules/cjs/loader.js:*:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*:*)
     at startup (internal/bootstrap/node.js:*:*)

test/message/error_exit.out

@@ -5,11 +5,11 @@ assert.js:*
 
 AssertionError [ERR_ASSERTION]: 1 strictEqual 2
     at Object.<anonymous> (*test*message*error_exit.js:*:*)
-    at Module._compile (module.js:*:*)
-    at Object.Module._extensions..js (module.js:*:*)
-    at Module.load (module.js:*:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*:*)
-    at Function.Module.runMain (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*:*)
+    at Module.load (internal/modules/cjs/loader.js:*:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*:*)
     at startup (internal/bootstrap/node.js:*:*)
     at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)

test/message/esm_display_syntax_error.out

@@ -3,4 +3,4 @@ file:///*/test/message/esm_display_syntax_error.mjs:3
 await async () => 0;
 ^^^^^
 SyntaxError: Unexpected reserved word
-    at translators.set (internal/loader/Translators.js:*:*)
+    at translators.set (internal/modules/esm/Translators.js:*:*)

test/message/esm_display_syntax_error_import.out

@@ -3,4 +3,4 @@ file:///*/test/message/esm_display_syntax_error_import.mjs:6
   notfound
   ^^^^^^^^
 SyntaxError: The requested module '../fixtures/es-module-loaders/module-named-exports' does not provide an export named 'notfound'
-    at ModuleJob._instantiate (internal/loader/ModuleJob.js:*:*)
+    at ModuleJob._instantiate (internal/modules/esm/ModuleJob.js:*:*)

test/message/esm_display_syntax_error_import_module.out

@@ -3,4 +3,4 @@ file:///*/test/fixtures/es-module-loaders/syntax-error-import.mjs:1
 import { foo, notfound } from './module-named-exports';
               ^^^^^^^^
 SyntaxError: The requested module './module-named-exports' does not provide an export named 'notfound'
-    at ModuleJob._instantiate (internal/loader/ModuleJob.js:*:*)
+    at ModuleJob._instantiate (internal/modules/esm/ModuleJob.js:*:*)

test/message/esm_display_syntax_error_module.out

@@ -3,4 +3,4 @@ file:///*/test/fixtures/es-module-loaders/syntax-error.mjs:2
 await async () => 0;
 ^^^^^
 SyntaxError: Unexpected reserved word
-    at translators.set (internal/loader/Translators.js:*:*)
+    at translators.set (internal/modules/esm/Translators.js:*:*)

test/message/eval_messages.out

@@ -7,7 +7,7 @@ SyntaxError: Strict mode code may not include a with statement
     at createScript (vm.js:*:*)
     at Object.runInThisContext (vm.js:*:*)
     at Object.<anonymous> ([eval]-wrapper:*:*)
-    at Module._compile (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
     at evalScript (internal/bootstrap/node.js:*:*)
     at startup (internal/bootstrap/node.js:*:*)
     at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)
@@ -22,7 +22,7 @@ Error: hello
     at Script.runInThisContext (vm.js:*:*)
     at Object.runInThisContext (vm.js:*:*)
     at Object.<anonymous> ([eval]-wrapper:*:*)
-    at Module._compile (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
     at evalScript (internal/bootstrap/node.js:*:*)
     at startup (internal/bootstrap/node.js:*:*)
     at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)
@@ -36,7 +36,7 @@ Error: hello
     at Script.runInThisContext (vm.js:*:*)
     at Object.runInThisContext (vm.js:*:*)
     at Object.<anonymous> ([eval]-wrapper:*:*)
-    at Module._compile (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
     at evalScript (internal/bootstrap/node.js:*:*)
     at startup (internal/bootstrap/node.js:*:*)
     at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)
@@ -50,7 +50,7 @@ ReferenceError: y is not defined
     at Script.runInThisContext (vm.js:*:*)
     at Object.runInThisContext (vm.js:*:*)
     at Object.<anonymous> ([eval]-wrapper:*:*)
-    at Module._compile (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
     at evalScript (internal/bootstrap/node.js:*:*)
     at startup (internal/bootstrap/node.js:*:*)
     at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)

test/message/events_unhandled_error_common_trace.out

@@ -6,17 +6,17 @@ Error: foo:bar
     at bar (*events_unhandled_error_common_trace.js:*:*)
     at foo (*events_unhandled_error_common_trace.js:*:*)
     at Object.<anonymous> (*events_unhandled_error_common_trace.js:*:*)
-    at Module._compile (module.js:*:*)
-    at Object.Module._extensions..js (module.js:*:*)
-    at Module.load (module.js:*:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*:*)
-    at Function.Module.runMain (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*:*)
+    at Module.load (internal/modules/cjs/loader.js:*:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*:*)
     at startup (internal/bootstrap/node.js:*:*)
 Emitted 'error' event at:
     at quux (*events_unhandled_error_common_trace.js:*:*)
     at Object.<anonymous> (*events_unhandled_error_common_trace.js:*:*)
-    at Module._compile (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
     [... lines matching original stack trace ...]
     at startup (internal/bootstrap/node.js:*:*)
     at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)

test/message/events_unhandled_error_nexttick.out

@@ -4,17 +4,17 @@ events.js:*
 
 Error
     at Object.<anonymous> (*events_unhandled_error_nexttick.js:*:*)
-    at Module._compile (module.js:*:*)
-    at Object.Module._extensions..js (module.js:*:*)
-    at Module.load (module.js:*:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*:*)
-    at Function.Module.runMain (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*:*)
+    at Module.load (internal/modules/cjs/loader.js:*:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*:*)
     at startup (internal/bootstrap/node.js:*:*)
     at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)
 Emitted 'error' event at:
     at process.nextTick (*events_unhandled_error_nexttick.js:*:*)
     at process._tickCallback (internal/process/next_tick.js:*:*)
-    at Function.Module.runMain (module.js:*:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*:*)
     at startup (internal/bootstrap/node.js:*:*)
     at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)

test/message/events_unhandled_error_sameline.out

@@ -4,16 +4,16 @@ events.js:*
 
 Error
     at Object.<anonymous> (*events_unhandled_error_sameline.js:*:*)
-    at Module._compile (module.js:*:*)
-    at Object.Module._extensions..js (module.js:*:*)
-    at Module.load (module.js:*:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*:*)
-    at Function.Module.runMain (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*:*)
+    at Module.load (internal/modules/cjs/loader.js:*:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*:*)
     at startup (internal/bootstrap/node.js:*:*)
     at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)
 Emitted 'error' event at:
     at Object.<anonymous> (*events_unhandled_error_sameline.js:*:*)
-    at Module._compile (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
     [... lines matching original stack trace ...]
     at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)

test/message/if-error-has-good-stack.out

@@ -11,9 +11,9 @@ AssertionError [ERR_ASSERTION]: ifError got unwanted exception: test error
     at b (*if-error-has-good-stack.js:*:*)
     at a (*if-error-has-good-stack.js:*:*)
     at Object.<anonymous> (*if-error-has-good-stack.js:*:*)
-    at Module._compile (module.js:*:*)
-    at Object.Module._extensions..js (module.js:*:*)
-    at Module.load (module.js:*:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*:*)
-    at Function.Module.runMain (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*:*)
+    at Module.load (internal/modules/cjs/loader.js:*:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*:*)

test/message/nexttick_throw.out

@@ -5,6 +5,6 @@
 ReferenceError: undefined_reference_error_maker is not defined
     at *test*message*nexttick_throw.js:*:*
     at process._tickCallback (internal/process/next_tick.js:*:*)
-    at Function.Module.runMain (module.js:*:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*:*)
     at startup (internal/bootstrap/node.js:*:*)
     at bootstrapNodeJSCore (internal/bootstrap/node.js:*:*)

test/message/stdin_messages.out

@@ -7,7 +7,7 @@ SyntaxError: Strict mode code may not include a with statement
     at createScript (vm.js:*)
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> ([stdin]-wrapper:*:*)
-    at Module._compile (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
     at evalScript (internal/bootstrap/node.js:*:*)
     at Socket.<anonymous> (internal/bootstrap/node.js:*:*)
     at Socket.emit (events.js:*:*)
@@ -24,7 +24,7 @@ Error: hello
     at Script.runInThisContext (vm.js:*)
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> ([stdin]-wrapper:*:*)
-    at Module._compile (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
     at evalScript (internal/bootstrap/node.js:*:*)
     at Socket.<anonymous> (internal/bootstrap/node.js:*:*)
     at Socket.emit (events.js:*:*)
@@ -39,7 +39,7 @@ Error: hello
     at Script.runInThisContext (vm.js:*)
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> ([stdin]-wrapper:*:*)
-    at Module._compile (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
     at evalScript (internal/bootstrap/node.js:*:*)
     at Socket.<anonymous> (internal/bootstrap/node.js:*:*)
     at Socket.emit (events.js:*:*)
@@ -55,7 +55,7 @@ ReferenceError: y is not defined
     at Script.runInThisContext (vm.js:*)
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> ([stdin]-wrapper:*:*)
-    at Module._compile (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*:*)
     at evalScript (internal/bootstrap/node.js:*:*)
     at Socket.<anonymous> (internal/bootstrap/node.js:*:*)
     at Socket.emit (events.js:*:*)

test/message/undefined_reference_in_new_context.out

@@ -9,8 +9,8 @@ ReferenceError: foo is not defined
     at Script.runInNewContext (vm.js:*)
     at Object.runInNewContext (vm.js:*)
     at Object.<anonymous> (*test*message*undefined_reference_in_new_context.js:*)
-    at Module._compile (module.js:*)
-    at *..js (module.js:*)
-    at Module.load (module.js:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*:*)
+    at Module._compile (internal/modules/cjs/loader.js:*)
+    at *..js (internal/modules/cjs/loader.js:*)
+    at Module.load (internal/modules/cjs/loader.js:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*:*)

test/message/vm_display_runtime_error.out

@@ -8,12 +8,12 @@ Error: boo!
     at Script.runInThisContext (vm.js:*)
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> (*test*message*vm_display_runtime_error.js:*)
-    at Module._compile (module.js:*)
-    at Object.Module._extensions..js (module.js:*)
-    at Module.load (module.js:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*)
-    at Function.Module.runMain (module.js:*)
+    at Module._compile (internal/modules/cjs/loader.js:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*)
+    at Module.load (internal/modules/cjs/loader.js:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*)
 test.vm:1
 throw new Error("spooky!")
 ^
@@ -23,9 +23,9 @@ Error: spooky!
     at Script.runInThisContext (vm.js:*)
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> (*test*message*vm_display_runtime_error.js:*)
-    at Module._compile (module.js:*)
-    at Object.Module._extensions..js (module.js:*)
-    at Module.load (module.js:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*)
-    at Function.Module.runMain (module.js:*)
+    at Module._compile (internal/modules/cjs/loader.js:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*)
+    at Module.load (internal/modules/cjs/loader.js:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*)

test/message/vm_display_syntax_error.out

@@ -7,12 +7,12 @@ SyntaxError: Unexpected number
     at createScript (vm.js:*)
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> (*test*message*vm_display_syntax_error.js:*)
-    at Module._compile (module.js:*)
-    at Object.Module._extensions..js (module.js:*)
-    at Module.load (module.js:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*)
-    at Function.Module.runMain (module.js:*)
+    at Module._compile (internal/modules/cjs/loader.js:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*)
+    at Module.load (internal/modules/cjs/loader.js:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*)
 test.vm:1
 var 5;
     ^
@@ -21,9 +21,9 @@ SyntaxError: Unexpected number
     at createScript (vm.js:*)
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> (*test*message*vm_display_syntax_error.js:*)
-    at Module._compile (module.js:*)
-    at Object.Module._extensions..js (module.js:*)
-    at Module.load (module.js:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*)
-    at Function.Module.runMain (module.js:*)
+    at Module._compile (internal/modules/cjs/loader.js:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*)
+    at Module.load (internal/modules/cjs/loader.js:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*)

test/message/vm_dont_display_runtime_error.out

@@ -9,9 +9,9 @@ Error: boo!
     at Script.runInThisContext (vm.js:*)
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> (*test*message*vm_dont_display_runtime_error.js:*)
-    at Module._compile (module.js:*)
-    at Object.Module._extensions..js (module.js:*)
-    at Module.load (module.js:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*)
-    at Function.Module.runMain (module.js:*)
+    at Module._compile (internal/modules/cjs/loader.js:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*)
+    at Module.load (internal/modules/cjs/loader.js:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*)

test/message/vm_dont_display_syntax_error.out

@@ -9,9 +9,9 @@ SyntaxError: Unexpected number
     at createScript (vm.js:*)
     at Object.runInThisContext (vm.js:*)
     at Object.<anonymous> (*test*message*vm_dont_display_syntax_error.js:*)
-    at Module._compile (module.js:*)
-    at Object.Module._extensions..js (module.js:*)
-    at Module.load (module.js:*)
-    at tryModuleLoad (module.js:*:*)
-    at Function.Module._load (module.js:*)
-    at Function.Module.runMain (module.js:*)
+    at Module._compile (internal/modules/cjs/loader.js:*)
+    at Object.Module._extensions..js (internal/modules/cjs/loader.js:*)
+    at Module.load (internal/modules/cjs/loader.js:*)
+    at tryModuleLoad (internal/modules/cjs/loader.js:*:*)
+    at Function.Module._load (internal/modules/cjs/loader.js:*)
+    at Function.Module.runMain (internal/modules/cjs/loader.js:*)

test/parallel/test-internal-module-map-asserts.js

@@ -3,7 +3,7 @@
 
 const common = require('../common');
 const assert = require('assert');
-const ModuleMap = require('internal/loader/ModuleMap');
+const ModuleMap = require('internal/modules/esm/ModuleMap');
 
 // ModuleMap.get, ModuleMap.has and ModuleMap.set should only accept string
 // values as url argument.

test/parallel/test-internal-modules-strip-shebang.js

@@ -3,7 +3,7 @@
 require('../common');
 
 const assert = require('assert');
-const stripShebang = require('internal/module').stripShebang;
+const stripShebang = require('internal/modules/cjs/helpers').stripShebang;
 
 [
   ['', ''],

test/parallel/test-module-require-depth.js

@@ -3,12 +3,14 @@
 require('../common');
 const fixtures = require('../common/fixtures');
 const assert = require('assert');
-const internalModule = require('internal/module');
+const {
+  requireDepth
+} = require('internal/modules/cjs/helpers');
 
 // Module one loads two too so the expected depth for two is, well, two.
-assert.strictEqual(internalModule.requireDepth, 0);
+assert.strictEqual(requireDepth, 0);
 const one = require(fixtures.path('module-require-depth', 'one'));
 const two = require(fixtures.path('module-require-depth', 'two'));
 assert.deepStrictEqual(one, { requireDepth: 1 });
 assert.deepStrictEqual(two, { requireDepth: 2 });
-assert.strictEqual(internalModule.requireDepth, 0);
+assert.strictEqual(requireDepth, 0);