fix(enhanced): Populate buildMeta and buildInfo on ConsumeSharedPlugin using fallbacks (#4063)

Co-authored-by: Vinicius Rocha <[email protected]>
Co-authored-by: Copilot <[email protected]>

Author: 3 people

.changeset/great-pandas-knock.md

@@ -0,0 +1,5 @@
+---
+'@module-federation/enhanced': patch
+---
+
+fix(enhanced): Populate `buildMeta` and `buildInfo` on `ConsumeSharedPlugin` using fallbacks

.vscode/launch.json

@@ -90,7 +90,6 @@
       "type": "node",
       "request": "launch",
       "preLaunchTask": "pnpm-build-enhanced",
-      "runtimeExecutable": "/Users/bytedance/.nvm/versions/node/v18.20.8/bin/node",
       "runtimeArgs": [
         "${workspaceFolder}/node_modules/jest/bin/jest.js",
         "test/ConfigTestCases.basictest.js",

packages/enhanced/src/lib/sharing/ConsumeSharedPlugin.ts

@@ -695,6 +695,54 @@ class ConsumeSharedPlugin {
             return Promise.resolve();
           },
         );
+
+        // Add finishModules hook to copy buildMeta/buildInfo from fallback modules *after* webpack's export analysis
+        // Running earlier causes failures, so we intentionally execute later than plugins like FlagDependencyExportsPlugin.
+        // This still follows webpack's pattern used by FlagDependencyExportsPlugin and InferAsyncModulesPlugin, but with a
+        // later stage. Based on webpack's Compilation.js: finishModules (line 2833) runs before seal (line 2920).
+        compilation.hooks.finishModules.tapAsync(
+          {
+            name: PLUGIN_NAME,
+            stage: 10, // Run after FlagDependencyExportsPlugin (default stage 0)
+          },
+          (modules, callback) => {
+            for (const module of modules) {
+              // Only process ConsumeSharedModule instances with fallback dependencies
+              if (
+                !(module instanceof ConsumeSharedModule) ||
+                !module.options.import
+              ) {
+                continue;
+              }
+
+              let dependency;
+              if (module.options.eager) {
+                // For eager mode, get the fallback directly from dependencies
+                dependency = module.dependencies[0];
+              } else {
+                // For async mode, get it from the async dependencies block
+                dependency = module.blocks[0]?.dependencies[0];
+              }
+
+              if (dependency) {
+                const fallbackModule =
+                  compilation.moduleGraph.getModule(dependency);
+                if (
+                  fallbackModule &&
+                  fallbackModule.buildMeta &&
+                  fallbackModule.buildInfo
+                ) {
+                  // Copy buildMeta and buildInfo following webpack's DelegatedModule pattern: this.buildMeta = { ...delegateData.buildMeta };
+                  // This ensures ConsumeSharedModule inherits ESM/CJS detection (exportsType) and other optimization metadata
+                  module.buildMeta = { ...fallbackModule.buildMeta };
+                  module.buildInfo = { ...fallbackModule.buildInfo };
+                }
+              }
+            }
+            callback();
+          },
+        );
+
         compilation.hooks.additionalTreeRuntimeRequirements.tap(
           PLUGIN_NAME,
           (chunk, set) => {

packages/enhanced/test/configCases/sharing/consume-nested/index.js

@@ -0,0 +1,4 @@
+it('should be able to consume nested modules', async () => {
+  const { default: main } = await import('package-1');
+  expect(main('test')).toEqual('test package-1 package-2');
+});

packages/enhanced/test/configCases/sharing/consume-nested/node_modules/package-1/esm/index.js

@@ -0,0 +1,7 @@
+{
+  "version": "1.0.0",
+  "dependencies": {
+    "package-2": "1.0.0",
+    "package-1": "1.0.0"
+  }
+}