fix: correct detect transformed module external request

Author: fi3ework

packages/core/src/config.ts

@@ -141,6 +141,39 @@ export async function loadConfig({
   return { content: content as RslibConfig, filePath: configFilePath };
 }
 
+// Match logic is derived from https://github.com/webpack/webpack/blob/94aba382eccf3de1004d235045d4462918dfdbb7/lib/ExternalModuleFactoryPlugin.js#L89-L158
+const handleMatchedExternal = (
+  value: string | string[] | boolean | Record<string, string | string[]>,
+  request: string,
+): boolean => {
+  if (typeof value === 'boolean') {
+    return value;
+  }
+
+  if (typeof value === 'string') {
+    const [first, second] = value.split(' ');
+    const hasType = !!second;
+    const _request = second ? second : first;
+
+    // Don't need to warn explicit declared external type.
+    if (!hasType) {
+      return request === _request;
+    }
+
+    return false;
+  }
+
+  if (Array.isArray(value)) {
+    return handleMatchedExternal(value[0] ?? '', request);
+  }
+
+  if (typeof value === 'object') {
+    return false;
+  }
+
+  return false;
+};
+
 const composeExternalsWarnConfig = (
   format: Format,
   ...externalsArray: NonNullable<EnvironmentConfig['output']>['externals'][]
@@ -163,18 +196,24 @@ const composeExternalsWarnConfig = (
   const matchUserExternals = (
     externals: NonNullable<EnvironmentConfig['output']>['externals'],
     request: string,
-    callback: (matched?: true) => void,
+    callback: (matched: boolean, shouldWarn?: boolean) => void,
   ) => {
+    // string
     if (typeof externals === 'string') {
-      if (externals === request) {
-        callback(true);
+      if (handleMatchedExternal(externals, request)) {
+        callback(true, true);
         return;
       }
-    } else if (Array.isArray(externals)) {
+    }
+    // array
+    if (Array.isArray(externals)) {
       let i = 0;
       const next = () => {
         let asyncFlag: boolean;
-        const handleExternalsAndCallback = (matched?: true) => {
+        const handleExternalsAndCallback = (
+          matched: boolean,
+          shouldWarn?: boolean,
+        ) => {
           if (!matched) {
             if (asyncFlag) {
               asyncFlag = false;
@@ -183,13 +222,13 @@ const composeExternalsWarnConfig = (
             return next();
           }
 
-          callback(matched);
+          callback(matched, shouldWarn);
         };
 
         do {
           asyncFlag = true;
           if (i >= externals.length) {
-            return callback();
+            return callback(false);
           }
           matchUserExternals(
             externals[i++],
@@ -202,37 +241,47 @@ const composeExternalsWarnConfig = (
 
       next();
       return;
-    } else if (externals instanceof RegExp) {
+    }
+    // regexp
+    if (externals instanceof RegExp) {
       if (externals.test(request)) {
-        callback(true);
+        callback(true, true);
         return;
       }
-    } else if (typeof externals === 'function') {
+    }
+    // function
+    else if (typeof externals === 'function') {
       // TODO: Support function
-    } else if (typeof externals === 'object') {
+    }
+    // object
+    else if (typeof externals === 'object') {
       if (Object.prototype.hasOwnProperty.call(externals, request)) {
-        callback(true);
+        if (handleMatchedExternal(externals[request]!, request)) {
+          callback(true, true);
+        } else {
+          callback(true);
+        }
         return;
       }
     }
 
-    callback();
+    callback(false);
   };
 
   return {
     output: {
       externals: [
         ({ request, dependencyType, contextInfo }: any, callback: any) => {
-          let externalized = false;
-          const _callback = (matched?: true) => {
-            if (matched) {
-              externalized = true;
+          let shouldWarn = false;
+          const _callback = (_matched: boolean, _shouldWarn?: boolean) => {
+            if (_shouldWarn) {
+              shouldWarn = true;
             }
           };
 
           if (contextInfo.issuer && dependencyType === 'commonjs') {
             matchUserExternals(externals, request, _callback);
-            if (externalized) {
+            if (shouldWarn) {
               logger.warn(composeModuleImportWarn(request));
             }
           }
@@ -1449,8 +1498,8 @@ async function composeLibRsbuildConfig(
   const dtsConfig = await composeDtsConfig(config, dtsExtension);
   const externalsWarnConfig = composeExternalsWarnConfig(
     format!,
-    autoExternalConfig?.output?.externals,
     userExternalsConfig?.output?.externals,
+    autoExternalConfig?.output?.externals,
   );
   const minifyConfig = composeMinifyConfig(config);
   const bannerFooterConfig = composeBannerFooterConfig(banner, footer);

pnpm-lock.yaml

@@ -89,15 +89,30 @@ test('should get warn when use require in ESM', async () => {
   const { entries } = await buildAndGetResults({ fixturePath });
   const logStrings = logs.map((log) => stripAnsi(log));
 
-  expect(entries.esm).toContain(
-    'import * as __WEBPACK_EXTERNAL_MODULE_react__ from "react"',
-  );
-
-  expect(
-    logStrings.some((l) =>
-      l.includes(stripAnsi(composeModuleImportWarn('react'))),
-    ),
-  ).toBe(true);
+  const shouldWarn = ['react', 'e2', 'e3', 'e5', 'e6', 'e7'];
+  const shouldNotWarn = ['e1', 'e4', 'e8', 'lodash/add', 'lodash/drop'];
+
+  for (const item of shouldWarn) {
+    expect(entries.esm).toContain(
+      `import * as __WEBPACK_EXTERNAL_MODULE_${item}__ from "${item}"`,
+    );
+  }
+
+  for (const item of shouldWarn) {
+    expect(
+      logStrings.some((l) =>
+        l.includes(stripAnsi(composeModuleImportWarn(item))),
+      ),
+    ).toBe(true);
+  }
+
+  for (const item of shouldNotWarn) {
+    expect(
+      logStrings.some((l) =>
+        l.includes(stripAnsi(composeModuleImportWarn(item))),
+      ),
+    ).toBe(false);
+  }
 
   restore();
 });

tests/integration/auto-external/index.test.ts

@@ -2,6 +2,7 @@
   "name": "module-import-warn",
   "private": true,
   "dependencies": {
+    "lodash": "^4.17.21",
     "react": "^19.0.0"
   }
 }

tests/integration/auto-external/module-import-warn/package.json

@@ -8,4 +8,20 @@ export default defineConfig({
       index: './src/index.ts',
     },
   },
+  output: {
+    externals: [
+      {
+        e1: 'commonjs e1',
+        e2: 'e2',
+        e3: true,
+        e4: ['commonjs e4'],
+        e5: ['e5'],
+        'lodash/add': false,
+        'lodash/drop': 'commonjs lodash/drop',
+        e8: ['module e8'],
+      },
+      /e6/,
+      'e7',
+    ],
+  },
 });

tests/integration/auto-external/module-import-warn/rslib.config.ts

@@ -1,4 +1,14 @@
 export const foo = () => {
   const React = require('react');
-  return React.version;
+  const e1 = require('e1');
+  const e2 = require('e2');
+  const e3 = require('e3');
+  const e4 = require('e4');
+  const e5 = require('e5');
+  const e6 = require('e6');
+  const e7 = require('e7');
+  const e8 = require('e8');
+  const add = require('lodash/add');
+  const drop = require('lodash/drop');
+  return React.version + e1 + e2 + e3 + e4 + e5 + e6 + e7 + e8 + add + drop;
 };