From 3da4d1ccb648b3415386138c83af0e3b911b98a9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kr=C3=A6n=20Hansen?= <kraen.hansen@mongodb.com>
Date: Fri, 31 Oct 2025 14:30:14 +0100
Subject: [PATCH] Allow passing a promise of build info

---
 packages/mongodb-build-info/src/index.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/mongodb-build-info/src/index.ts b/packages/mongodb-build-info/src/index.ts
index 07111a9f..e72f4e39 100644
--- a/packages/mongodb-build-info/src/index.ts
+++ b/packages/mongodb-build-info/src/index.ts
@@ -146,6 +146,8 @@ export function getGenuineMongoDB(uri: string): {
 type IdentifyServerNameOptions = {
   connectionString: string;
   adminCommand: (command: Document) => Promise<Document>;
+  /** Pass this to prevent multiple requests for the same data */
+  buildInfo?: Promise<Document>;
 };
 
 /**
@@ -155,6 +157,7 @@ type IdentifyServerNameOptions = {
 export async function identifyServerName({
   connectionString,
   adminCommand,
+  buildInfo,
 }: IdentifyServerNameOptions): Promise<string> {
   try {
     const hostname = getHostnameFromUrl(connectionString);
@@ -175,7 +178,7 @@ export async function identifyServerName({
     }
 
     const candidates = await Promise.all([
-      adminCommand({ buildInfo: 1 }).then(
+      (buildInfo ?? adminCommand({ buildInfo: 1 })).then(
         (response) => {
           if ('ferretdb' in response) {
             return ['ferretdb'];