fix(ssr): not flatten export * as (fix #3934) (#3954)

Co-authored-by: Alec Larson <[email protected]>

Author: hgl

packages/vite/src/node/ssr/__tests__/ssrTransform.spec.ts

@@ -119,6 +119,15 @@ test('export * from', async () => {
   `)
 })
 
+test('export * as from', async () => {
+  expect((await ssrTransform(`export * as foo from 'vue'`, null, null)).code)
+    .toMatchInlineSnapshot(`
+    "const __vite_ssr_import_0__ = __vite_ssr_import__(\\"vue\\")
+
+    Object.defineProperty(__vite_ssr_exports__, \\"foo\\", { enumerable: true, configurable: true, get(){ return __vite_ssr_import_0__ }})"
+  `)
+})
+
 test('export default', async () => {
   expect(
     (await ssrTransform(`export default {}`, null, null)).code

packages/vite/src/node/ssr/ssrTransform.ts

@@ -133,9 +133,15 @@ export async function ssrTransform(
 
     // export * from './foo'
     if (node.type === 'ExportAllDeclaration') {
-      const importId = defineImport(node, node.source.value as string)
-      s.remove(node.start, node.end)
-      s.append(`\n${ssrExportAllKey}(${importId})`)
+      if ((node as any).exported) {
+        const importId = defineImport(node, node.source.value as string)
+        defineExport((node as any).exported.name, `${importId}`)
+        s.remove(node.start, node.end)
+      } else {
+        const importId = defineImport(node, node.source.value as string)
+        s.remove(node.start, node.end)
+        s.append(`\n${ssrExportAllKey}(${importId})`)
+      }
     }
   }