feat: validate t3 env on build

.eslintrc

@@ -42,6 +42,7 @@
             "endOfLine": "auto"
           }
         ],
+        "import/extensions": "off", // Avoid missing file extension errors, TypeScript already provides a similar feature
         "react/function-component-definition": "off", // Disable Airbnb's specific function type
         "react/destructuring-assignment": "off", // Vscode doesn't support automatically destructuring, it's a pain to add a new variable
         "react/require-default-props": "off", // Allow non-defined react props as undefined

next.config.js → next.config.mjs

@@ -1,10 +1,13 @@
-/* eslint-disable import/no-extraneous-dependencies */
-const withBundleAnalyzer = require('@next/bundle-analyzer')({
+/* eslint-disable import/no-extraneous-dependencies, import/extensions */
+import './src/lib/Env.mjs';
+import withBundleAnalyzer from '@next/bundle-analyzer';
+
+const bundleAnalyzer = withBundleAnalyzer({
   enabled: process.env.ANALYZE === 'true',
 });
 
 /** @type {import('next').NextConfig} */
-module.exports = withBundleAnalyzer({
+export default bundleAnalyzer({
   eslint: {
     dirs: ['.'],
   },

src/lib/DB.ts

@@ -2,7 +2,7 @@ import { createClient } from '@libsql/client';
 import { drizzle } from 'drizzle-orm/libsql';
 import { migrate } from 'drizzle-orm/libsql/migrator';
 
-import { Env } from './Env';
+import { Env } from './Env.mjs';
 
 const client = createClient({
   url: Env.DATABASE_URL,

src/lib/Env.ts → src/lib/Env.mjs

@@ -1,3 +1,4 @@
+/* eslint-disable import/prefer-default-export */
 import { createEnv } from '@t3-oss/env-nextjs';
 import process from 'process';
 import { z } from 'zod';

tsconfig.json

@@ -26,7 +26,8 @@
 
     "esModuleInterop": true,
     "allowSyntheticDefaultImports": true,
-    "allowJs": false,
+    "allowJs": true,
+    "checkJs": true,
     "skipLibCheck": true,
     "forceConsistentCasingInFileNames": true,
 
@@ -52,6 +53,7 @@
     "**/*.ts",
     "**/*.tsx",
     ".storybook/*.ts",
-    ".next/types/**/*.ts"
+    ".next/types/**/*.ts",
+    "src/lib/Env.mjs"
   ]
 }