Increase maxBuffer for capnp upload (#10233)

Co-authored-by: Jesse Li <[email protected]>

Author: veggiedefender

.changeset/fifty-tires-kiss.md

@@ -0,0 +1,5 @@
+---
+"wrangler": patch
+---
+
+Increase the maxBuffer size for capnp uploads

packages/wrangler/src/deployment-bundle/capnp.ts

@@ -20,12 +20,14 @@ export function handleUnsafeCapnp(capnp: CfCapnp): Buffer {
 		);
 	}
 	const srcPrefix = resolve(base_path ?? ".");
-	const capnpProcess = spawnSync("capnp", [
-		"compile",
-		"-o-",
-		`--src-prefix=${srcPrefix}`,
-		...capnpSchemas,
-	]);
+	const capnpProcess = spawnSync(
+		"capnp",
+		["compile", "-o-", `--src-prefix=${srcPrefix}`, ...capnpSchemas],
+		// This number was chosen arbitrarily. If you get ENOBUFS because your compiled schema is still
+		// too large, then we may need to bump this again or figure out another approach.
+		// https://github.com/cloudflare/workers-sdk/pull/10217
+		{ maxBuffer: 3 * 1024 * 1024 }
+	);
 	if (capnpProcess.error) {
 		throw capnpProcess.error;
 	}