fix(modern-module): compat with more export cases

crates/rspack_plugin_library/src/modern_module_library_plugin.rs

@@ -2,10 +2,10 @@ use std::hash::Hash;
 
 use rspack_core::rspack_sources::{ConcatSource, RawSource, SourceExt};
 use rspack_core::{
-  merge_runtime, ApplyContext, ChunkUkey, CodeGenerationExportsFinalNames, Compilation,
-  CompilationOptimizeChunkModules, CompilationParams, CompilerCompilation, CompilerOptions,
-  ConcatenatedModule, ConcatenatedModuleExportsDefinitions, LibraryOptions, ModuleIdentifier,
-  Plugin, PluginContext,
+  merge_runtime, to_identifier, ApplyContext, ChunkUkey, CodeGenerationExportsFinalNames,
+  Compilation, CompilationOptimizeChunkModules, CompilationParams, CompilerCompilation,
+  CompilerOptions, ConcatenatedModule, ConcatenatedModuleExportsDefinitions, LibraryOptions,
+  ModuleIdentifier, Plugin, PluginContext,
 };
 use rspack_error::{error_bail, Result};
 use rspack_hash::RspackHash;
@@ -74,6 +74,14 @@ impl ModernModuleLibraryPlugin {
     let unconcatenated_module_ids = module_ids
       .iter()
       .filter(|id| !concatenated_module_ids.contains(id))
+      .filter(|id| {
+        let module = module_graph
+          .module_by_identifier(id)
+          .expect("should have module");
+        module
+          .get_concatenation_bailout_reason(&module_graph, &compilation.chunk_graph)
+          .is_none()
+      })
       .collect::<HashSet<_>>();
 
     for module_id in unconcatenated_module_ids.into_iter() {
@@ -114,6 +122,7 @@ fn render_startup(
     .get(module_id, Some(&chunk.runtime));
 
   let mut exports = vec![];
+  let mut exports_with_property_access = vec![];
 
   let Some(_) = self.get_options_for_chunk(compilation, chunk_ukey)? else {
     return Ok(());
@@ -136,14 +145,29 @@ fn render_startup(
         .expect("name can't be empty");
 
       let final_name = exports_final_names.get(used_name.as_str());
+
       if let Some(final_name) = final_name {
-        if info_name == final_name {
+        // Currently, there's not way to determine if a final_name contains a property access.
+        if final_name.contains('.') || final_name.contains("()") {
+          exports_with_property_access.push((final_name, info_name));
+        } else if info_name == final_name {
           exports.push(info_name.to_string());
         } else {
           exports.push(format!("{} as {}", final_name, info_name));
         }
       }
     }
+
+    for (final_name, info_name) in exports_with_property_access.iter() {
+      let var_name = format!("__webpack_exports__{}", to_identifier(info_name));
+
+      source.add(RawSource::from(format!(
+        "var {var_name} = {};\n",
+        final_name
+      )));
+
+      exports.push(format!("{} as {}", var_name, info_name));
+    }
   }
 
   if !exports.is_empty() {

packages/rspack-test-tools/tests/__snapshots__/Config.test.js.snap

@@ -327,20 +327,9 @@ div {
 head{--webpack--120:&_13;}"
 `;
 
-exports[`config config/library/modern-module-force-concaten step  should pass 1`] = `
-"
-;// CONCATENATED MODULE: ./a.js
-const a = 'a'
-
-export { a };
-"
-`;
-
-exports[`config config/library/modern-module-force-concaten step  should pass 2`] = `
+exports[`config config/library/modern-module-force-concaten step  should pass: .cjs should bail out 1`] = `
 "var __webpack_modules__ = ({
-\\"772\\": (function (module) {
-
-;// CONCATENATED MODULE: ./b.cjs
+\\"851\\": (function (module) {
 module.exports = 'b'
 
 }),
@@ -374,23 +363,113 @@ return module.exports;
 // startup
 // Load entry module and return exports
 // This entry module is referenced by other modules so it can't be inlined
-var __webpack_exports__ = __webpack_require__(\\"772\\");
+var __webpack_exports__ = __webpack_require__(\\"851\\");
 "
 `;
 
-exports[`config config/library/modern-module-force-concaten step  should pass 3`] = `
-"
-;// CONCATENATED MODULE: ./c.js
-const c = 'c'
+exports[`config config/library/modern-module-force-concaten step  should pass: .cjs should bail out when bundling 1`] = `
+"var __webpack_modules__ = ({
+\\"997\\": (function (module) {
+module.exports = 'bar'
+
+}),
+
+});
+/************************************************************************/
+// The module cache
+var __webpack_module_cache__ = {};
+
+// The require function
+function __webpack_require__(moduleId) {
 
+// Check if module is in cache
+var cachedModule = __webpack_module_cache__[moduleId];
+if (cachedModule !== undefined) {
+return cachedModule.exports;
+}
+// Create a new module (and put it into the cache)
+var module = (__webpack_module_cache__[moduleId] = {
+exports: {}
+});
+// Execute the module function
+__webpack_modules__[moduleId](module, module.exports, __webpack_require__);
+
+// Return the exports of the module
+return module.exports;
+
+}
+
+/************************************************************************/
+// webpack/runtime/compat_get_default_export
+(() => {
+// getDefaultExport function for compatibility with non-harmony modules
+__webpack_require__.n = function (module) {
+	var getter = module && module.__esModule ?
+		function () { return module['default']; } :
+		function () { return module; };
+	__webpack_require__.d(getter, { a: getter });
+	return getter;
+};
+
+
+
+
+})();
+// webpack/runtime/define_property_getters
+(() => {
+__webpack_require__.d = function(exports, definition) {
+	for(var key in definition) {
+        if(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {
+            Object.defineProperty(exports, key, { enumerable: true, get: definition[key] });
+        }
+    }
+};
+})();
+// webpack/runtime/has_own_property
+(() => {
+__webpack_require__.o = function (obj, prop) {
+	return Object.prototype.hasOwnProperty.call(obj, prop);
+};
+
+})();
+/************************************************************************/
+
+;// CONCATENATED MODULE: ./e/foo.js
+const foo = 'foo'
+
+// EXTERNAL MODULE: ./e/bar.cjs
+var bar = __webpack_require__(\\"997\\");
+var bar_default = /*#__PURE__*/__webpack_require__.n(bar);
+;// CONCATENATED MODULE: ./e/index.js
+
+
+
+
+
+var __webpack_exports__bar = (bar_default());
+export { foo, __webpack_exports__bar as bar };
 "
 `;
 
-exports[`config config/library/modern-module-force-concaten step  should pass 4`] = `
+exports[`config config/library/modern-module-force-concaten step  should pass: .mjs should concat 1`] = `
 "
 ;// CONCATENATED MODULE: ./d.mjs
 const d = 'd'
-export { d };
+"
+`;
+
+exports[`config config/library/modern-module-force-concaten step  should pass: harmony export should concat 1`] = `
+"
+;// CONCATENATED MODULE: ./a.js
+const a = 'a'
+
+export { a };
+"
+`;
+
+exports[`config config/library/modern-module-force-concaten step  should pass: unambiguous should bail out 1`] = `
+"const c = 'c'
+
 "
 `;
 

packages/rspack-test-tools/tests/configCases/library/modern-module-force-concaten/d.mjs

@@ -1 +1 @@
-export const d = 'd'
+const d = 'd'

packages/rspack-test-tools/tests/configCases/library/modern-module-force-concaten/e/bar.cjs

@@ -0,0 +1 @@
+module.exports = 'bar'

packages/rspack-test-tools/tests/configCases/library/modern-module-force-concaten/e/foo.js

@@ -0,0 +1 @@
+export const foo = 'foo'

packages/rspack-test-tools/tests/configCases/library/modern-module-force-concaten/e/index.js

@@ -0,0 +1,4 @@
+import { foo } from './foo.js'
+import bar from './bar.cjs'
+
+export { foo, bar }

packages/rspack-test-tools/tests/configCases/library/modern-module-force-concaten/rspack.config.js

@@ -4,7 +4,8 @@ module.exports = {
 		"a": "./a.js",
 		"b": "./b.cjs",
 		"c": "./c.js",
-		"d": "./d.mjs"
+		"d": "./d.mjs",
+		"e": "./e/index.js"
 	},
 	output: {
 		filename: `[name].js`,
@@ -13,15 +14,6 @@ module.exports = {
 		iife: false,
 		chunkFormat: "module",
 	},
-	externalsType: "module",
-  externals: [
-    (data, callback) => {
-      if (data.contextInfo.issuer) {
-        return callback(null, data.request)
-      }
-      callback()
-    },
-  ],
 	experiments: {
 		outputModule: true
 	},
@@ -37,10 +29,11 @@ module.exports = {
 			 */
 			const handler = compilation => {
 				compilation.hooks.afterProcessAssets.tap("testcase", assets => {
-					expect(assets['a.js']._value).toMatchSnapshot();
-					expect(assets['b.js']._value).toMatchSnapshot();
-					expect(assets['c.js']._value).toMatchSnapshot();
-					expect(assets['d.js']._value).toMatchSnapshot();
+					expect(assets['a.js']._value).toMatchSnapshot("harmony export should concat");
+					expect(assets['b.js']._value).toMatchSnapshot(".cjs should bail out");
+					expect(assets['c.js']._value).toMatchSnapshot("unambiguous should bail out");
+					expect(assets['d.js']._value).toMatchSnapshot(".mjs should concat");
+					expect(assets['e.js']._value).toMatchSnapshot(".cjs should bail out when bundling");
 				});
 			};
 			this.hooks.compilation.tap("testcase", handler);