fix: always require db-user and password for mysql (#1730)

apps/nextjs/src/env.mjs

@@ -1,10 +1,6 @@
 import { createEnv } from "@t3-oss/env-nextjs";
 import { z } from "zod";
 
-const isUsingDbUrl = Boolean(process.env.DB_URL);
-const isUsingDbHost = Boolean(process.env.DB_HOST);
-const isUsingDbCredentials = process.env.DB_DRIVER === "mysql2";
-
 export const env = createEnv({
   shared: {
     VERCEL_URL: z
@@ -19,21 +15,6 @@ export const env = createEnv({
    * built with invalid env vars.
    */
   server: {
-    DB_DRIVER: z.enum(["better-sqlite3", "mysql2"]).default("better-sqlite3"),
-    // If the DB_HOST is set, the DB_URL is optional
-    DB_URL: isUsingDbHost ? z.string().optional() : z.string(),
-    DB_HOST: isUsingDbUrl ? z.string().optional() : z.string(),
-    DB_PORT: isUsingDbUrl
-      ? z.string().regex(/\d+/).transform(Number).optional()
-      : z
-          .string()
-          .regex(/\d+/)
-          .transform(Number)
-          .refine((number) => number >= 1)
-          .default("3306"),
-    DB_USER: isUsingDbCredentials ? z.string() : z.string().optional(),
-    DB_PASSWORD: isUsingDbCredentials ? z.string() : z.string().optional(),
-    DB_NAME: isUsingDbUrl ? z.string().optional() : z.string(),
     // Comma separated list of docker hostnames that can be used to connect to query the docker endpoints (localhost:2375,host.docker.internal:2375, ...)
     DOCKER_HOSTNAMES: z.string().optional(),
     DOCKER_PORTS: z.number().optional(),
@@ -51,13 +32,6 @@ export const env = createEnv({
   runtimeEnv: {
     VERCEL_URL: process.env.VERCEL_URL,
     PORT: process.env.PORT,
-    DB_URL: process.env.DB_URL,
-    DB_HOST: process.env.DB_HOST,
-    DB_USER: process.env.DB_USER,
-    DB_PASSWORD: process.env.DB_PASSWORD,
-    DB_NAME: process.env.DB_NAME,
-    DB_PORT: process.env.DB_PORT,
-    DB_DRIVER: process.env.DB_DRIVER,
     NODE_ENV: process.env.NODE_ENV,
     DOCKER_HOSTNAMES: process.env.DOCKER_HOSTNAMES,
     DOCKER_PORTS: process.env.DOCKER_PORTS,