refactor(rsc-mf): dedupe repeated expose import entries

Author: cursoragent

tests/integration/rsc-mf/remote/src/runtime/createRscExposeDefinitions.ts

@@ -15,6 +15,9 @@ interface NormalizedExposeDefinition {
   importPaths: string[];
   exposeOverrides: Record<string, unknown>;
 }
+const getUniqueImportPaths = (importPaths: string[]) => [
+  ...new Set(importPaths),
+];
 
 if (!CALLBACK_BOOTSTRAP_IMPORT.startsWith(CALLBACK_BOOTSTRAP_PREFIX)) {
   throw new Error(
@@ -65,7 +68,7 @@ const normalizeExposeImportPaths = (
     exposeImport.every(item => typeof item === 'string')
   ) {
     return {
-      importPaths: exposeImport,
+      importPaths: getUniqueImportPaths(exposeImport),
       exposeOverrides,
     } satisfies NormalizedExposeDefinition;
   }

tests/integration/rsc-mf/tests/createRscExposeDefinitions.test.ts

@@ -169,6 +169,31 @@ describe('createRscExposeDefinitions', () => {
     });
   });
 
+  it('deduplicates repeated entries in object expose import arrays', () => {
+    const { createRscExposeDefinitions, CALLBACK_BOOTSTRAP_MODULE } =
+      loadCreateRscExposeDefinitions();
+    const exposeDefinitions = createRscExposeDefinitions({
+      './infoBundle': {
+        import: [
+          './src/components/infoBundle.ts',
+          './src/components/infoBundle.ts',
+          './src/components/remoteMeta.ts',
+        ],
+      },
+    });
+
+    expect(exposeDefinitions).toEqual({
+      './infoBundle': {
+        import: [
+          CALLBACK_BOOTSTRAP_MODULE,
+          './src/components/infoBundle.ts',
+          './src/components/remoteMeta.ts',
+        ],
+        layer: 'react-server-components',
+      },
+    });
+  });
+
   it('rejects object expose definitions with invalid import payloads', () => {
     const { createRscExposeDefinitions } = loadCreateRscExposeDefinitions();
     expect(() =>