Production 환경에서의 DB 자동 Migration 구현

src/lib/server/db/kysely.ts

@@ -1,10 +1,11 @@
-import { Kysely, PostgresDialect } from "kysely";
-import { Pool } from "pg";
+import { Kysely, PostgresDialect, Migrator } from "kysely";
+import pg from "pg";
 import env from "$lib/server/loadenv";
+import migrations from "./migrations";
 import type { Database } from "./schema";
 
 const dialect = new PostgresDialect({
-  pool: new Pool({
+  pool: new pg.Pool({
     host: env.database.host,
     port: env.database.port,
     user: env.database.user,
@@ -15,6 +16,32 @@ const dialect = new PostgresDialect({
 
 const db = new Kysely<Database>({ dialect });
 
-// TODO: Migration
+export const migrateDB = async () => {
+  if (env.nodeEnv !== "production") return;
+
+  const migrator = new Migrator({
+    db,
+    provider: {
+      async getMigrations() {
+        return migrations;
+      },
+    },
+  });
+  const { error, results } = await migrator.migrateToLatest();
+  if (error) {
+    const migration = results?.find(({ status }) => status === "Error");
+    if (migration) {
+      console.error(`Migration "${migration.migrationName}" failed.`);
+    }
+    console.error(error);
+    process.exit(1);
+  }
+
+  if (results?.length === 0) {
+    console.log("Database is up-to-date.");
+  } else {
+    console.log("Database migration completed.");
+  }
+};
 
 export default db;