fixup! unique file name

Author: vicb

packages/cloudflare/src/cli/commands/populate-cache.ts

@@ -1,4 +1,5 @@
 import fs from "node:fs";
+import fsp from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
 
@@ -239,8 +240,8 @@ async function populateR2IncrementalCache(
 		file: fullPath,
 	}));
 
-	const listFile = path.join(os.tmpdir(), `r2-bulk-list.json`);
-
+	const tempDir = await fsp.mkdtemp(path.join(os.tmpdir(), "open-next-"));
+	const listFile = path.join(tempDir, `r2-bulk-list.json`);
 	fs.writeFileSync(listFile, JSON.stringify(objectList));
 
 	const concurrency = Math.max(1, populateCacheOptions.cacheChunkSize ?? 50);
@@ -287,8 +288,10 @@ async function populateKVIncrementalCache(
 
 	logger.info(`Inserting ${assets.length} assets to KV in chunks of ${chunkSize}`);
 
+	const tempDir = await fsp.mkdtemp(path.join(os.tmpdir(), "open-next-"));
+
 	for (const i of tqdm(Array.from({ length: totalChunks }, (_, i) => i))) {
-		const chunkPath = path.join(buildOpts.outputDir, "cloudflare", `cache-chunk-${i}.json`);
+		const chunkPath = path.join(tempDir, `cache-chunk-${i}.json`);
 
 		const kvMapping = assets
 			.slice(i * chunkSize, (i + 1) * chunkSize)