Clear paths config on svelte-kit preview

packages/kit/src/core/build/build_client.js

@@ -0,0 +1,108 @@
+import fs from 'fs';
+import path from 'path';
+import { copy_assets, posixify } from '../utils.js';
+import { create_app } from '../../core/create_app/index.js';
+import vite from 'vite';
+import svelte from '@sveltejs/vite-plugin-svelte';
+
+/**
+ * @param {{
+ *   cwd: string;
+ *   base: string;
+ *   config: import('types/config').ValidatedConfig
+ *   manifest: import('types/internal').ManifestData
+ *   build_dir: string;
+ *   output_dir: string;
+ *   client_entry_file: string;
+ *   service_worker_entry_file: string;
+ * }} options
+ */
+export async function build_client({
+	cwd,
+	base,
+	config,
+	manifest,
+	build_dir,
+	output_dir,
+	client_entry_file,
+	service_worker_entry_file
+}) {
+	create_app({
+		manifest_data: manifest,
+		output: build_dir,
+		cwd
+	});
+
+	copy_assets(build_dir);
+
+	process.env.VITE_SVELTEKIT_AMP = config.kit.amp ? 'true' : '';
+	process.env.VITE_SVELTEKIT_SERVICE_WORKER = service_worker_entry_file ? '/service-worker.js' : '';
+
+	const client_out_dir = `${output_dir}/client/${config.kit.appDir}`;
+	const client_manifest_file = `${client_out_dir}/manifest.json`;
+
+	/** @type {Record<string, string>} */
+	const input = {
+		start: path.resolve(cwd, client_entry_file)
+	};
+
+	// This step is optional — Vite/Rollup will create the necessary chunks
+	// for everything regardless — but it means that entry chunks reflect
+	// their location in the source code, which is helpful for debugging
+	manifest.components.forEach((file) => {
+		const resolved = path.resolve(cwd, file);
+		const relative = path.relative(config.kit.files.routes, resolved);
+
+		const name = relative.startsWith('..')
+			? path.basename(file)
+			: posixify(path.join('pages', relative));
+		input[name] = resolved;
+	});
+
+	/** @type {any} */
+	const user_config = config.kit.vite();
+
+	await vite.build({
+		...user_config,
+		configFile: false,
+		root: cwd,
+		base,
+		build: {
+			...user_config.build,
+			cssCodeSplit: true,
+			manifest: true,
+			outDir: client_out_dir,
+			polyfillDynamicImport: false,
+			rollupOptions: {
+				...(user_config.build && user_config.build.rollupOptions),
+				input,
+				output: {
+					entryFileNames: '[name]-[hash].js',
+					chunkFileNames: 'chunks/[name]-[hash].js',
+					assetFileNames: 'assets/[name]-[hash][extname]'
+				},
+				preserveEntrySignatures: 'strict'
+			}
+		},
+		resolve: {
+			...user_config.resolve,
+			alias: {
+				...(user_config.resolve && user_config.resolve.alias),
+				$app: path.resolve(`${build_dir}/runtime/app`),
+				$lib: config.kit.files.lib
+			}
+		},
+		plugins: [
+			...(user_config.plugins || []),
+			svelte({
+				extensions: config.extensions
+			})
+		]
+	});
+
+	/** @type {import('./types.js').ClientManifest} */
+	const client_manifest = JSON.parse(fs.readFileSync(client_manifest_file, 'utf-8'));
+	fs.renameSync(client_manifest_file, `${output_dir}/manifest.json`); // inspectable but not shipped
+
+	return client_manifest;
+}