From c577d3f96815b0c1dad5df1678401ac7b7c75121 Mon Sep 17 00:00:00 2001
From: Wang Fenjin <wangfenj@gmail.com>
Date: Wed, 23 Mar 2022 01:24:51 +0800
Subject: [PATCH] build: Skip empty protobuf files (#605)

---
 prost-build/src/lib.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/prost-build/src/lib.rs b/prost-build/src/lib.rs
index edf91a6a8..5259ea4dd 100644
--- a/prost-build/src/lib.rs
+++ b/prost-build/src/lib.rs
@@ -869,6 +869,10 @@ impl Config {
 
         let modules = self.generate(requests)?;
         for (module, content) in &modules {
+            if content.is_empty() {
+                continue;
+            }
+
             let file_name = file_names
                 .get(module)
                 .expect("every module should have a filename");