fix(preview-server): symlinked email templates wrongly handled (#2349)

Author: gabrielmfern

.changeset/little-weeks-call.md

@@ -0,0 +1,5 @@
+---
+"@react-email/preview-server": patch
+---
+
+fix rendering utilities exporter plugin not running for symlinks

packages/preview-server/src/utils/esbuild/renderring-utilities-exporter.ts

@@ -16,14 +16,15 @@ import { escapeStringForRegex } from './escape-string-for-regex';
  */
 export const renderingUtilitiesExporter = (emailTemplates: string[]) => ({
   name: 'rendering-utilities-exporter',
-  setup: (b: PluginBuild) => {
+  setup: async (b: PluginBuild) => {
+    const filterOptions = await Promise.all(
+      emailTemplates.map(async (emailPath) =>
+        escapeStringForRegex(await fs.realpath(emailPath)),
+      ),
+    );
     b.onLoad(
       {
-        filter: new RegExp(
-          emailTemplates
-            .map((emailPath) => escapeStringForRegex(emailPath))
-            .join('|'),
-        ),
+        filter: new RegExp(filterOptions.join('|')),
       },
       async ({ path: pathToFile }) => {
         return {