[fix] reestablish prerender.enabled option

fixes #7899

.changeset/olive-ears-suffer.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+[fix] reestablish prerender.enabled option

packages/kit/src/core/config/index.spec.js

@@ -113,7 +113,7 @@ const get_defaults = (prefix = '') => ({
 			crawl: true,
 			createIndexFiles: undefined,
 			default: undefined,
-			enabled: undefined,
+			enabled: true,
 			entries: ['*'],
 			force: undefined,
 			handleHttpError: 'fail',

packages/kit/src/core/config/options.js

@@ -238,10 +238,7 @@ const options = object(
 					(keypath) =>
 						`${keypath} has been removed. You can set it inside the top level +layout.js instead. See the PR for more information: https://github.com/sveltejs/kit/pull/6197`
 				),
-				enabled: error(
-					(keypath) =>
-						`${keypath} has been removed. You can wrap any code that should not be executed during build in a \`if (!building) {...}\` block. See the discussion for more information: https://github.com/sveltejs/kit/discussions/7716`
-				),
+				enabled: boolean(true),
 				entries: validate(['*'], (input, keypath) => {
 					if (!Array.isArray(input) || !input.every((page) => typeof page === 'string')) {
 						throw new Error(`${keypath} must be an array of strings`);

packages/kit/src/core/prerender/prerender.js

@@ -77,6 +77,11 @@ export async function prerender() {
 	/** @type {import('types').ValidatedKitConfig} */
 	const config = (await load_config()).kit;
 
+	if (!config.prerender.enabled) {
+		output_and_exit({ prerendered, prerender_map });
+		return;
+	}
+
 	/** @type {import('types').Logger} */
 	const log = logger({
 		verbose: verbose === 'true'

packages/kit/types/index.d.ts

@@ -435,6 +435,11 @@ export interface KitConfig {
 		 * @default true
 		 */
 		crawl?: boolean;
+		/**
+		 * Set this to `false` to disable prerendering altogether
+		 * @default true
+		 */
+		enabled?: boolean;
 		/**
 		 * An array of pages to prerender, or start crawling from (if `crawl: true`). The `*` string includes all non-dynamic routes (i.e. pages with no `[parameters]`, because SvelteKit doesn't know what value the parameters should have).
 		 * @default ["*"]