remove legacy transform code

packages/next/build/webpack/loaders/next-flight-client-entry-loader.ts

@@ -20,25 +20,15 @@ export default async function transformSource(this: any): Promise<string> {
   }
 
   const requests = modules as string[]
-  const code =
-    requests
-      // Filter out css files on the server
-      .filter((request) => (isServer ? !request.endsWith('.css') : true))
-      .map((request) =>
-        request.endsWith('.css')
-          ? `(() => import(/* webpackMode: "lazy" */ ${JSON.stringify(
-              request
-            )}))`
-          : `import(/* webpackMode: "eager" */ ${JSON.stringify(request)})`
-      )
-      .join(';\n') +
-    `
-    export const __next_rsc__ = {
-      server: false,
-      __webpack_require__
-    };
-    export default function RSC() {};
-    `
+  const code = requests
+    // Filter out css files on the server
+    .filter((request) => (isServer ? !request.endsWith('.css') : true))
+    .map((request) =>
+      request.endsWith('.css')
+        ? `(() => import(/* webpackMode: "lazy" */ ${JSON.stringify(request)}))`
+        : `import(/* webpackMode: "eager" */ ${JSON.stringify(request)})`
+    )
+    .join(';\n')
 
   const buildInfo = getModuleBuildInfo(this._module)
   const resolve = this.getResolve()

packages/next/build/webpack/loaders/next-flight-loader/index.ts

@@ -1,16 +1,7 @@
 import { RSC_MODULE_TYPES } from '../../../../shared/lib/constants'
 import { getRSCModuleType } from '../../../analysis/get-page-static-info'
-import { parse } from '../../../swc'
 import { getModuleBuildInfo } from '../get-module-build-info'
 
-function transformServer(source: string, isESModule: boolean) {
-  return (
-    source +
-    (isESModule ? `export const __next_rsc__` : `exports.__next_rsc__`) +
-    ` = { __webpack_require__, server: true }\n`
-  )
-}
-
 export default async function transformSource(
   this: any,
   source: string,
@@ -21,14 +12,8 @@ export default async function transformSource(
     throw new Error('Expected source to have been transformed to a string.')
   }
 
-  const { resourcePath } = this
   const callback = this.async()
   const buildInfo = getModuleBuildInfo(this._module)
-  const swcAST = await parse(source, {
-    filename: resourcePath,
-    isModule: 'unknown',
-  })
-
   const rscType = getRSCModuleType(source)
 
   // Assign the RSC meta information to buildInfo.
@@ -39,7 +24,5 @@ export default async function transformSource(
     return callback(null, source, sourceMap)
   }
 
-  const isModule = swcAST.type === 'Module'
-  const code = transformServer(source, isModule)
-  return callback(null, code, sourceMap)
+  return callback(null, source, sourceMap)
 }

packages/next/server/app-render.tsx

@@ -317,9 +317,6 @@ function createServerComponentRenderer(
   ComponentMod: {
     renderToReadableStream: any
     __next_app_webpack_require__?: any
-    __next_rsc__?: {
-      __webpack_require__?: any
-    }
   },
   {
     transformStream,
@@ -339,11 +336,9 @@ function createServerComponentRenderer(
 ): () => JSX.Element {
   // We need to expose the `__webpack_require__` API globally for
   // react-server-dom-webpack. This is a hack until we find a better way.
-  if (ComponentMod.__next_app_webpack_require__ || ComponentMod.__next_rsc__) {
+  if (ComponentMod.__next_app_webpack_require__) {
     // @ts-ignore
-    globalThis.__next_require__ =
-      ComponentMod.__next_app_webpack_require__ ||
-      ComponentMod.__next_rsc__?.__webpack_require__
+    globalThis.__next_require__ = ComponentMod.__next_app_webpack_require__
 
     // @ts-ignore
     globalThis.__next_chunk_load__ = () => Promise.resolve()
@@ -639,6 +634,7 @@ export async function renderToHTMLOrFlight(
   const requestAsyncStorage = ComponentMod.requestAsyncStorage
 
   if (
+    staticGenerationAsyncStorage &&
     !('getStore' in staticGenerationAsyncStorage) &&
     staticGenerationAsyncStorage.inUse
   ) {

packages/next/server/base-server.ts

@@ -963,15 +963,7 @@ export default abstract class Server<ServerOptions extends Options = Options> {
     let hasStaticPaths = !!components.getStaticPaths
 
     const hasGetInitialProps = !!components.Component?.getInitialProps
-    const isServerComponent = !!components.ComponentMod?.__next_rsc__
-    let isSSG =
-      !!components.getStaticProps ||
-      // For static server component pages, we currently always consider them
-      // as SSG since we also need to handle the next data (flight JSON).
-      (isServerComponent &&
-        !hasServerProps &&
-        !hasGetInitialProps &&
-        process.env.NEXT_RUNTIME !== 'edge')
+    let isSSG = !!components.getStaticProps
 
     // Toggle whether or not this is a Data request
     const isDataReq =
@@ -980,7 +972,7 @@ export default abstract class Server<ServerOptions extends Options = Options> {
         (req.headers['x-nextjs-data'] &&
           (this.serverOptions as any).webServerConfig)
       ) &&
-      (isSSG || hasServerProps || isServerComponent)
+      (isSSG || hasServerProps)
 
     delete query.__nextDataReq
 
@@ -1027,7 +1019,6 @@ export default abstract class Server<ServerOptions extends Options = Options> {
     }
 
     if (
-      !isServerComponent &&
       !!req.headers['x-nextjs-data'] &&
       (!res.statusCode || res.statusCode === 200)
     ) {