fix: Generated types no longer permanently delete themselves (#5063)

* fix:  sync no longer permanently deletes  directory

* Changelog

* DRY, you idiot

* fix: Lint

.changeset/lemon-planets-sit.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+[fix] svelte-kit sync no longer permanently deletes the types directory

packages/kit/src/core/sync/utils.js

@@ -11,12 +11,20 @@ const previous_contents = new Map();
  */
 export function write_if_changed(file, code) {
 	if (code !== previous_contents.get(file)) {
-		previous_contents.set(file, code);
-		mkdirp(path.dirname(file));
-		fs.writeFileSync(file, code);
+		write(file, code);
 	}
 }
 
+/**
+ * @param {string} file
+ * @param {string} code
+ */
+export function write(file, code) {
+	previous_contents.set(file, code);
+	mkdirp(path.dirname(file));
+	fs.writeFileSync(file, code);
+}
+
 /** @param {string} str */
 export function trim(str) {
 	const indentation = /** @type {RegExpExecArray} */ (/\n?(\s*)/.exec(str))[1];

packages/kit/src/core/sync/write_types.js

@@ -1,6 +1,6 @@
 import { rimraf } from '../../utils/filesystem.js';
 import { parse_route_id } from '../../utils/routing.js';
-import { write_if_changed } from './utils.js';
+import { write } from './utils.js';
 
 /** @param {string} imports */
 const header = (imports) => `
@@ -76,9 +76,6 @@ export function write_types(config, manifest_data) {
 		const parts = (key || 'index').split('/');
 		parts.push('__types', /** @type {string} */ (parts.pop()));
 
-		write_if_changed(
-			`${config.kit.outDir}/types/${parts.join('/')}.d.ts`,
-			content.join('\n').trim()
-		);
+		write(`${config.kit.outDir}/types/${parts.join('/')}.d.ts`, content.join('\n').trim());
 	});
 }