[feat] split Vite plugin in two (#7990)

.changeset/seven-bikes-give.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+[feat] split Vite plugin in two

packages/kit/src/exports/vite/index.js

@@ -61,7 +61,7 @@ const enforced_config = {
 
 /** @return {import('vite').Plugin[]} */
 export function sveltekit() {
-	return [...svelte(), kit()];
+	return [...svelte(), ...kit()];
 }
 
 /**
@@ -74,7 +74,7 @@ export function sveltekit() {
  * - https://rollupjs.org/guide/en/#build-hooks
  * - https://rollupjs.org/guide/en/#output-generation-hooks
  *
- * @return {import('vite').Plugin}
+ * @return {import('vite').Plugin[]}
  */
 function kit() {
 	/** @type {import('types').ValidatedConfig} */
@@ -183,8 +183,9 @@ function kit() {
 	// TODO remove this for 1.0
 	check_vite_version();
 
-	return {
-		name: 'vite-plugin-svelte-kit',
+	/** @type {import('vite').Plugin} */
+	const plugin_build = {
+		name: 'vite-plugin-sveltekit-build',
 
 		/**
 		 * Build the SvelteKit-provided Vite config to be merged with the user's vite.config.js file.
@@ -539,7 +540,12 @@ function kit() {
 				fs.unlinkSync(`${paths.output_dir}/client/${vite_config.build.manifest}`);
 				fs.unlinkSync(`${paths.output_dir}/server/${vite_config.build.manifest}`);
 			}
-		},
+		}
+	};
+
+	/** @type {import('vite').Plugin} */
+	const plugin_middleware = {
+		name: 'vite-plugin-sveltekit-middleware',
 
 		/**
 		 * Adds the SvelteKit middleware to do SSR in dev mode.
@@ -557,6 +563,8 @@ function kit() {
 			return preview(vite, vite_config, svelte_config);
 		}
 	};
+
+	return [plugin_build, plugin_middleware];
 }
 
 function check_vite_version() {