fix: revert plugin changes, allow createMiddleware self compilation, fix HMR tests

packages/start-client-core/src/createCsrfMiddleware.ts

@@ -1,5 +1,4 @@
-import { createIsomorphicFn } from '@tanstack/start-fn-stubs'
-import { createMiddleware } from './createMiddleware'
+import { createIsomorphicFn, createMiddleware } from '@tanstack/start-fn-stubs'
 import type {
   RequestMiddlewareAfterServer,
   RequestServerOptions,
@@ -77,8 +76,8 @@ type CreateCsrfMiddleware = <TRegister, TMiddlewares>(
   opts?: CsrfMiddlewareOptions<TRegister, TMiddlewares>,
 ) => RequestMiddlewareAfterServer<{}, undefined, undefined>
 
-const innerCreateCsrfMiddleware: CreateCsrfMiddleware = (opts = {}) => {
-  const middleware = createMiddleware().server(async (ctx) => {
+const innerCreateCsrfMiddleware = ((opts: any = {}) => {
+  const middleware = createMiddleware().server(async (ctx: any) => {
     const csrfCtx = ctx as RequestServerOptions<any, any> & typeof ctx
 
     if (opts.filter && !(await opts.filter(csrfCtx))) {
@@ -97,7 +96,7 @@ const innerCreateCsrfMiddleware: CreateCsrfMiddleware = (opts = {}) => {
   }
 
   return middleware
-}
+}) as any as CreateCsrfMiddleware
 
 export const createCsrfMiddleware: CreateCsrfMiddleware =
   createIsomorphicFn().server(innerCreateCsrfMiddleware) as CreateCsrfMiddleware

packages/start-fn-stubs/src/createMiddleware.ts

@@ -0,0 +1,16 @@
+export function createMiddleware(opts?: any, opts2?: any): any {
+  const options = { ...(opts2 || opts) }
+  const proxy = new Proxy(
+    {},
+    {
+      get(_, prop) {
+        if (prop === 'options') return options
+        return (value: any) => {
+          options[prop] = value
+          return proxy
+        }
+      },
+    },
+  )
+  return proxy
+}

packages/start-fn-stubs/src/index.ts

@@ -5,5 +5,6 @@ export {
   type ClientOnlyFn,
   type IsomorphicFnBase,
 } from './createIsomorphicFn'
+export { createMiddleware } from './createMiddleware'
 
 export { createServerOnlyFn, createClientOnlyFn } from './envOnly'

packages/start-plugin-core/src/start-compiler/compiler.ts

@@ -694,6 +694,7 @@ export class StartCompiler {
         ['createIsomorphicFn', 'IsomorphicFn'],
         ['createServerOnlyFn', 'ServerOnlyFn'],
         ['createClientOnlyFn', 'ClientOnlyFn'],
+        ['createMiddleware', 'Middleware'],
       ]),
     )
 
@@ -705,6 +706,7 @@ export class StartCompiler {
         ['createIsomorphicFn', 'IsomorphicFn'],
         ['createServerOnlyFn', 'ServerOnlyFn'],
         ['createClientOnlyFn', 'ClientOnlyFn'],
+        ['createMiddleware', 'Middleware'],
       ]),
     )
 

packages/start-plugin-core/src/vite/start-compiler-plugin/plugin.ts

@@ -1,4 +1,3 @@
-import { AsyncLocalStorage } from 'node:async_hooks'
 import { VIRTUAL_MODULES } from '@tanstack/start-server-core'
 import { resolve as resolvePath } from 'pathe'
 import {
@@ -47,20 +46,6 @@ type ModuleInvalidationEnvironment = {
   }
 }
 
-type StartCompilerPluginContext = {
-  environment: {
-    name: string
-    mode: string
-    transformRequest: (url: string) => Promise<unknown>
-  }
-  load: (options: { id: string }) => Promise<{ code?: string | null }>
-  resolve: (
-    source: string,
-    importer?: string,
-  ) => Promise<{ id: string; external?: boolean | string } | null>
-  error: (message: string) => never
-}
-
 function invalidateMatchingFileModules(
   environment: ModuleInvalidationEnvironment,
   ids: Iterable<string>,
@@ -196,17 +181,6 @@ export function startCompilerPlugin(
   opts: StartCompilerPluginOptions,
 ): PluginOption {
   const compilers = new Map<string, ReturnType<typeof createStartCompiler>>()
-  const compilerContextStorage =
-    new AsyncLocalStorage<StartCompilerPluginContext>()
-
-  const getCompilerContext = () => {
-    const context = compilerContextStorage.getStore()
-    if (!context) {
-      throw new Error('Start compiler Vite context is unavailable.')
-    }
-
-    return context
-  }
 
   // Shared registry of server functions across all environments
   const serverFnsById: Record<string, ServerFn> = {}
@@ -288,30 +262,27 @@ export function startCompilerPlugin(
                   ? createViteDevServerFnModuleSpecifierEncoder(root)
                   : undefined,
               loadModule: async (id: string) => {
-                const compilerContext = getCompilerContext()
-
                 if (mode === 'build') {
-                  const loaded = await compilerContext.load({ id })
+                  const loaded = await this.load({ id })
                   const code = loaded.code ?? ''
 
                   compiler!.ingestModule({ code, id })
                   return
                 }
 
-                if (compilerContext.environment.mode !== 'dev') {
-                  compilerContext.error(
-                    `could not load module ${id}: unknown environment mode ${compilerContext.environment.mode}`,
+                if (this.environment.mode !== 'dev') {
+                  this.error(
+                    `could not load module ${id}: unknown environment mode ${this.environment.mode}`,
                   )
                 }
 
-                await compilerContext.environment.transformRequest(
+                await this.environment.transformRequest(
                   `${id}?${SERVER_FN_LOOKUP}`,
                 )
               },
 
               resolveId: async (source: string, importer?: string) => {
-                const compilerContext = getCompilerContext()
-                const r = await compilerContext.resolve(source, importer)
+                const r = await this.resolve(source, importer)
 
                 if (r) {
                   if (!r.external) {
@@ -331,15 +302,11 @@ export function startCompilerPlugin(
             compilerTransforms,
           })
 
-          const result = await compilerContextStorage.run(
-            this as unknown as StartCompilerPluginContext,
-            () =>
-              compiler.compile({
-                id,
-                code,
-                detectedKinds,
-              }),
-          )
+          const result = await compiler.compile({
+            id,
+            code,
+            detectedKinds,
+          })
           return result
         },
       },