feat(config): dynamically generate list of svelte exports (#941)

* feat(config): dynamically generate list of svelte exports

* fix(optimizeDeps): don't optimize server-only exports of svelte

Author: dominikg

.changeset/lemon-trains-hear.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/vite-plugin-svelte': minor
+---
+
+feat(config): dynamically extract list of svelte exports from peer dependency so that new exports work automatically"

.changeset/old-ants-remain.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/vite-plugin-svelte': patch
+---
+
+fix(optimizeDeps): avoid to optimise server only entrypoints of svelte that are never used on the client

packages/e2e-tests/kit-node/__tests__/kit.spec.ts

@@ -300,14 +300,15 @@ describe('kit-node', () => {
 					'e2e-test-dep-svelte-api-only',
 					'svelte/animate',
 					'svelte/easing',
+					'svelte/events',
 					'svelte/internal',
+					'svelte/internal/client',
 					'svelte/motion',
+					'svelte/reactivity',
 					'svelte/store',
 					'svelte/transition',
 					'svelte',
 					'svelte/internal/disclose-version',
-					'svelte/internal/server',
-					'svelte/server',
 					'svelte/legacy',
 					'svelte-i18n > deepmerge',
 					'svelte-i18n > cli-color',
@@ -326,8 +327,11 @@ describe('kit-node', () => {
 				const expectedDedupe = [
 					'svelte/animate',
 					'svelte/easing',
+					'svelte/events',
 					'svelte/internal',
+					'svelte/internal/client',
 					'svelte/motion',
+					'svelte/reactivity',
 					'svelte/store',
 					'svelte/transition',
 					'svelte',

packages/vite-plugin-svelte/src/utils/constants.js

@@ -1,20 +1,24 @@
+import { createRequire } from 'node:module';
+
 export const VITE_RESOLVE_MAIN_FIELDS = ['browser', 'module', 'jsnext:main', 'jsnext'];
 
 export const SVELTE_RESOLVE_MAIN_FIELDS = ['svelte'];
 
-export const SVELTE_IMPORTS = [
-	'svelte/animate',
-	'svelte/easing',
-	'svelte/internal',
-	'svelte/internal/disclose-version',
-	'svelte/motion',
-	'svelte/store',
-	'svelte/transition',
-	'svelte/server',
-	'svelte/internal/server',
-	'svelte/legacy',
-	'svelte'
-];
+export const SVELTE_IMPORTS = Object.entries(
+	createRequire(import.meta.url)('svelte/package.json').exports
+)
+	.map(([name, config]) => {
+		// ignore type only
+		if (typeof config === 'object' && Object.keys(config).length === 1 && config.types) {
+			return '';
+		}
+		// ignore names
+		if (name === './package.json' || name === './compiler') {
+			return '';
+		}
+		return name.replace(/^\./, 'svelte');
+	})
+	.filter((s) => s.length > 0);
 
 export const SVELTE_EXPORT_CONDITIONS = ['svelte'];
 

packages/vite-plugin-svelte/src/utils/options.js

@@ -553,7 +553,9 @@ function buildExtraConfigForSvelte(config) {
 	/** @type {string[]} */
 	const exclude = [];
 	if (!isDepExcluded('svelte', config.optimizeDeps?.exclude ?? [])) {
-		const svelteImportsToInclude = SVELTE_IMPORTS;
+		const svelteImportsToInclude = SVELTE_IMPORTS.filter(
+			(si) => !(si.endsWith('/server') || si.includes('/server/'))
+		);
 		log.debug(
 			`adding bare svelte packages to optimizeDeps.include: ${svelteImportsToInclude.join(', ')} `,
 			undefined,