Initial commit

packages/db/src/index.ts

@@ -0,0 +1,23 @@
+import postgres, { type Sql } from "postgres";
+import { z } from "zod";
+
+const envSchema = z.object({
+  DATABASE_URL: z.string().min(1)
+});
+
+let cachedDb: Sql | undefined;
+
+export function getDb() {
+  if (cachedDb) return cachedDb;
+
+  const env = envSchema.parse(process.env);
+  cachedDb = postgres(env.DATABASE_URL);
+  return cachedDb;
+}
+
+export async function closeDb() {
+  if (!cachedDb) return;
+  const db = cachedDb;
+  cachedDb = undefined;
+  await db.end({ timeout: 5 });
+}

packages/db/src/migrate.ts

@@ -0,0 +1,43 @@
+import { readdir } from "node:fs/promises";
+import { readFile } from "node:fs/promises";
+import path from "node:path";
+import postgres from "postgres";
+import { z } from "zod";
+
+const envSchema = z.object({
+  DATABASE_URL: z.string().min(1)
+});
+
+async function main() {
+  const env = envSchema.parse(process.env);
+  const sql = postgres(env.DATABASE_URL, { max: 1 });
+
+  try {
+    await sql`CREATE TABLE IF NOT EXISTS schema_migrations (id text primary key, applied_at timestamptz not null default now())`;
+
+    const migrationsDir = path.join(import.meta.dir, "..", "migrations");
+    const files = (await readdir(migrationsDir)).filter((f) => f.endsWith(".sql")).sort();
+
+    for (const file of files) {
+      const already = await sql<{ id: string }[]>`SELECT id FROM schema_migrations WHERE id = ${file}`;
+      if (already.length > 0) continue;
+
+      const contents = await readFile(path.join(migrationsDir, file), "utf8");
+      await sql.begin(async (tx) => {
+        await tx.unsafe(contents);
+        await tx`INSERT INTO schema_migrations (id) VALUES (${file})`;
+      });
+
+      // eslint-disable-next-line no-console
+      console.log(`Applied migration ${file}`);
+    }
+  } finally {
+    await sql.end({ timeout: 5 });
+  }
+}
+
+main().catch((err) => {
+  // eslint-disable-next-line no-console
+  console.error(err);
+  process.exitCode = 1;
+});