fix: avoid renaming the export name when outputting a library

crates/rspack_plugin_library/src/assign_library_plugin.rs

@@ -401,20 +401,14 @@ async fn finish_modules(&self, compilation: &mut Compilation) -> Result<()> {
   }
 
   for (runtime, export, module_identifier) in runtime_info {
+    let mut module_graph = compilation.get_module_graph_mut();
     if let Some(export) = export {
-      let exports_info = compilation
-        .get_module_graph_mut()
-        .get_export_info(module_identifier, &(export.as_str()).into());
-      exports_info.set_used(
-        &mut compilation.get_module_graph_mut(),
-        UsageState::Used,
-        Some(&runtime),
-      );
+      let export_info = module_graph.get_export_info(module_identifier, &(export.as_str()).into());
+      export_info.set_used(&mut module_graph, UsageState::Used, Some(&runtime));
+      export_info.set_can_mangle_use(&mut module_graph, Some(false));
     } else {
-      let exports_info = compilation
-        .get_module_graph()
-        .get_exports_info(&module_identifier);
-      exports_info.set_used_in_unknown_way(&mut compilation.get_module_graph_mut(), Some(&runtime));
+      let exports_info = module_graph.get_exports_info(&module_identifier);
+      exports_info.set_used_in_unknown_way(&mut module_graph, Some(&runtime));
     }
   }
   Ok(())

packages/rspack-test-tools/tests/configCases/library/rspack-issue-8045/index.js

@@ -0,0 +1,5 @@
+export default 1;
+
+it('should work', () => {
+    expect(window.MyLibrary).toEqual(1);
+})

packages/rspack-test-tools/tests/configCases/library/rspack-issue-8045/rspack.config.js

@@ -0,0 +1,10 @@
+/** @type {import("@rspack/core").Configuration} */
+module.exports = {
+    output: {
+        library: {
+			name: "MyLibrary",
+			export: "default",
+			type: "window"
+		},
+    }
+}

packages/rspack-test-tools/tests/configCases/library/rspack-issue-8045/test.config.js

@@ -0,0 +1,6 @@
+/** @type {import("../../../..").TConfigCaseConfig} */
+module.exports = {
+	moduleScope(scope) {
+		scope.window = {};
+	}
+};