chore: import upstream snapshot with attribution

2026-07-13 13:32:57 +08:00
commit cd420f9332
4811 changed files with 884702 additions and 0 deletions
@@ -0,0 +1,55 @@
+import { PrismaClient } from "@trigger.dev/database";
+
+type DatabaseFingerprint = { systemIdentifier: string; databaseName: string };
+
+async function readDatabaseFingerprint(url: string): Promise<DatabaseFingerprint> {
+  const client = new PrismaClient({ datasources: { db: { url } } });
+  try {
+    const rows = await client.$queryRawUnsafe<
+      Array<{ system_identifier: string; database_name: string }>
+    >(
+      "SELECT system_identifier::text AS system_identifier, current_database() AS database_name FROM pg_control_system()"
+    );
+    const row = rows[0];
+    if (!row) {
+      throw new Error("distinct-db sentinel: pg_control_system() returned no rows");
+    }
+    return { systemIdentifier: row.system_identifier, databaseName: row.database_name };
+  } finally {
+    await client.$disconnect();
+  }
+}
+
+export async function probeDistinctDatabases(
+  legacyUrl: string,
+  newUrl: string,
+  opts?: { logger?: { warn: (msg: string, meta?: Record<string, unknown>) => void } }
+): Promise<{ distinct: true } | { distinct: false; reason: string }> {
+  try {
+    const [legacy, next] = await Promise.all([
+      readDatabaseFingerprint(legacyUrl),
+      readDatabaseFingerprint(newUrl),
+    ]);
+    const sameCluster = legacy.systemIdentifier === next.systemIdentifier;
+    const sameDb = sameCluster && legacy.databaseName === next.databaseName;
+    // Same-cluster-different-database policy: two databases inside the SAME cluster
+    // (same system identifier, different current_database()) are reported distinct: true.
+    // That is acceptable — they are genuinely separate Postgres databases with separate
+    // WAL-visible state for our purposes, and the Cloud topology always uses separate
+    // clusters anyway. A stricter "must be a different cluster" policy would gate on
+    // sameCluster alone; that is flagged as an open question, not decided here.
+    if (sameDb) {
+      const reason =
+        "run-ops legacy and new URLs resolve to the SAME physical database " +
+        `(systemIdentifier=${legacy.systemIdentifier}, database=${legacy.databaseName}); ` +
+        "refusing to enable split — pooler/replica likely.";
+      opts?.logger?.warn(reason);
+      return { distinct: false, reason };
+    }
+    return { distinct: true };
+  } catch (error) {
+    const reason = `distinct-db sentinel probe failed; failing closed (single-DB). ${String(error)}`;
+    opts?.logger?.warn(reason, { error });
+    return { distinct: false, reason };
+  }
+}