perf: optimize template upload 2

generation/sync-template.ts

@@ -5,7 +5,7 @@ import path from "node:path";
 
 import { createHash } from "node:crypto";
 
-import { HeadObjectCommand, PutObjectCommand, S3Client } from "@aws-sdk/client-s3";
+import { HeadObjectCommand, ListObjectsV2Command, PutObjectCommand, S3Client } from "@aws-sdk/client-s3";
 
 import { rootDir } from "./utils";
 
@@ -31,17 +31,23 @@ const uploadTemplateSnapshot = (() => {
     },
   });
 
+  let existingSnapshots: string[] | undefined;
+
   return async function upload(key: string, buffer: Buffer) {
-    // check if the file exists
-    const c0 = new HeadObjectCommand({
-      Bucket: R2_BUCKET,
-      Key: `${R2_PREFIX}/${key}.zip`,
-    });
-    const response = await r2.send(c0);
-    if (response.ContentLength) {
+    if (!existingSnapshots) {
+      const c0 = new ListObjectsV2Command({
+        Bucket: R2_BUCKET,
+        Prefix: R2_PREFIX,
+      });
+      const response = await r2.send(c0);
+      existingSnapshots = response.Contents?.map((c) => c.Key).filter((k) => k !== undefined) as string[];
+    }
+
+    if (existingSnapshots.includes(key)) {
       console.log(`${key}.zip already exists, skipping upload`);
       return;
     }
+
     const c1 = new PutObjectCommand({
       Bucket: R2_BUCKET,
       Key: `${R2_PREFIX}/${key}.zip`,