refactor: keep the "runner" option in runnable dev environment

packages/vite/src/node/server/environments/runnableEnvironment.ts

@@ -22,6 +22,10 @@ export function createRunnableDevEnvironment(
 
 export interface RunnableDevEnvironmentContext
   extends Omit<DevEnvironmentContext, 'hot'> {
+  runner?: (
+    environment: RunnableDevEnvironment,
+    options?: ServerModuleRunnerOptions,
+  ) => ModuleRunner
   runnerOptions?: ServerModuleRunnerOptions
   hot?: false | HotChannel
 }
@@ -34,6 +38,12 @@ export function isRunnableDevEnvironment(
 
 class RunnableDevEnvironment extends DevEnvironment {
   private _runner: ModuleRunner | undefined
+  private _runnerFactory:
+    | ((
+        environment: RunnableDevEnvironment,
+        options?: ServerModuleRunnerOptions,
+      ) => ModuleRunner)
+    | undefined
   private _runnerOptions: ServerModuleRunnerOptions | undefined
 
   constructor(
@@ -42,14 +52,16 @@ class RunnableDevEnvironment extends DevEnvironment {
     context: RunnableDevEnvironmentContext,
   ) {
     super(name, config, context as DevEnvironmentContext)
+    this._runnerFactory = context.runner
     this._runnerOptions = context.runnerOptions
   }
 
   get runner(): ModuleRunner {
     if (this._runner) {
       return this._runner
     }
-    this._runner = createServerModuleRunner(this, this._runnerOptions)
+    const factory = this._runnerFactory || createServerModuleRunner
+    this._runner = factory(this, this._runnerOptions)
     return this._runner
   }
 }