repl: replace hard coded core module list with actual list

This replaces the internally used hard coded Node.js core module list with the actual internal existent modules. That way all modules are automatically picked up instead of having to update the list manually. This currently only applies to the REPL and to the Node.js `eval` functionality (User passed `-e` or `--eval` arguments to Node without `-i` or `--interactive`). Signed-off-by: Ruben Bridgewater <[email protected]> PR-URL: #33282 Reviewed-By: James M Snell <[email protected]> Reviewed-By: Michaël Zasso <[email protected]>
nodejs · May 16, 2020 · 69061dc · 69061dc
1 parent d33dcf1
commit 69061dc
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Showing 6 changed files with 22 additions and 62 deletions.
diff --git a/lib/internal/modules/cjs/helpers.js b/lib/internal/modules/cjs/helpers.js
@@ -2,6 +2,7 @@
 
 const {
   ObjectDefineProperty,
+  ObjectPrototypeHasOwnProperty,
   SafeMap,
 } = primordials;
 const {
@@ -109,55 +110,17 @@ function stripBOM(content) {
   return content;
 }
 
-const builtinLibs = [
-  'assert',
-  'async_hooks',
-  'buffer',
-  'child_process',
-  'cluster',
-  'crypto',
-  'dgram',
-  'dns',
-  'domain',
-  'events',
-  'fs',
-  'http',
-  'http2',
-  'https',
-  'net',
-  'os',
-  'path',
-  'perf_hooks',
-  'punycode',
-  'querystring',
-  'readline',
-  'repl',
-  'stream',
-  'string_decoder',
-  'tls',
-  'trace_events',
-  'tty',
-  'url',
-  'util',
-  'v8',
-  'vm',
-  'worker_threads',
-  'zlib',
-];
-
-if (internalBinding('config').experimentalWasi) {
-  builtinLibs.push('wasi');
-  builtinLibs.sort();
-}
-
-if (typeof internalBinding('inspector').open === 'function') {
-  builtinLibs.push('inspector');
-  builtinLibs.sort();
-}
-
 function addBuiltinLibsToObject(object) {
   // Make built-in modules available directly (loaded lazily).
-  builtinLibs.forEach((name) => {
+  const { builtinModules } = require('internal/modules/cjs/loader').Module;
+  builtinModules.forEach((name) => {
+    // Neither add underscored modules, nor ones that contain slashes (e.g.,
+    // 'fs/promises') or ones that are already defined.
+    if (name.startsWith('_') ||
+        name.includes('/') ||
+        ObjectPrototypeHasOwnProperty(object, name)) {
+      return;
+    }
     // Goals of this mechanism are:
     // - Lazy loading of built-in modules
     // - Having all built-in modules available as non-enumerable properties
@@ -203,7 +166,6 @@ function normalizeReferrerURL(referrer) {
 
 module.exports = {
   addBuiltinLibsToObject,
-  builtinLibs,
   loadNativeModule,
   makeRequireFunction,
   normalizeReferrerURL,

diff --git a/lib/repl.js b/lib/repl.js
@@ -63,7 +63,6 @@ const {
 } = primordials;
 
 const {
-  builtinLibs,
   makeRequireFunction,
   addBuiltinLibsToObject
 } = require('internal/modules/cjs/helpers');
@@ -86,6 +85,8 @@ const {
 } = require('internal/readline/utils');
 const { Console } = require('console');
 const CJSModule = require('internal/modules/cjs/loader').Module;
+const builtinModules = [...CJSModule.builtinModules]
+  .filter((e) => !e.startsWith('_'));
 const domain = require('domain');
 const debug = require('internal/util/debuglog').debuglog('repl');
 const {
@@ -158,7 +159,7 @@ module.paths = CJSModule._nodeModulePaths(module.filename);
 const writer = exports.writer = (obj) => inspect(obj, writer.options);
 writer.options = { ...inspect.defaultOptions, showProxy: true };
 
-exports._builtinLibs = builtinLibs;
+exports._builtinLibs = builtinModules;
 
 function REPLServer(prompt,
                     stream,

diff --git a/test/parallel/test-bootstrap-modules.js b/test/parallel/test-bootstrap-modules.js
@@ -17,7 +17,6 @@ const expectedModules = new Set([
   'Internal Binding credentials',
   'Internal Binding fs',
   'Internal Binding fs_dir',
-  'Internal Binding inspector',
   'Internal Binding module_wrap',
   'Internal Binding native_module',
   'Internal Binding options',
@@ -116,6 +115,7 @@ if (common.hasIntl) {
 }
 
 if (process.features.inspector) {
+  expectedModules.add('Internal Binding inspector');
   expectedModules.add('NativeModule internal/inspector_async_hook');
   expectedModules.add('NativeModule internal/util/inspector');
 }

diff --git a/test/parallel/test-module-cjs-helpers.js b/test/parallel/test-module-cjs-helpers.js
diff --git a/test/parallel/test-repl-mode.js b/test/parallel/test-repl-mode.js
@@ -39,6 +39,10 @@ function testStrictMode() {
 }
 
 function testStrictModeTerminal() {
+  if (!process.features.inspector) {
+    console.warn('Test skipped: V8 inspector is disabled');
+    return;
+  }
   // Verify that ReferenceErrors are reported in strict mode previews.
   const cli = initRepl(repl.REPL_MODE_STRICT, {
     terminal: true

diff --git a/test/parallel/test-repl-tab-complete.js b/test/parallel/test-repl-tab-complete.js
@@ -30,6 +30,7 @@ const {
 const assert = require('assert');
 const path = require('path');
 const fixtures = require('../common/fixtures');
+const { builtinModules } = require('module');
 const hasInspector = process.features.inspector;
 
 if (!common.isMainThread)
@@ -222,8 +223,9 @@ putIn.run(['.clear']);
 
 testMe.complete('require(\'', common.mustCall(function(error, data) {
   assert.strictEqual(error, null);
-  repl._builtinLibs.forEach(function(lib) {
-    assert(data[0].includes(lib), `${lib} not found`);
+  builtinModules.forEach((lib) => {
+    if (!lib.startsWith('_'))
+      assert(data[0].includes(lib), `${lib} not found`);
   });
 }));