From b0cbe9c0a3bcb195e61fdfde32ee6cff9ced6de4 Mon Sep 17 00:00:00 2001
From: Lucio Franco <luciofranco14@gmail.com>
Date: Wed, 4 May 2022 16:10:39 -0400
Subject: [PATCH] Revert "build: Skip empty protobuf files (#605)" (#639)

---
 prost-build/src/lib.rs        |  4 ----
 tests/src/build.rs            | 12 ++++++++++++
 tests/src/well_known_types.rs |  8 ++++++++
 3 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/prost-build/src/lib.rs b/prost-build/src/lib.rs
index 34f398155..e8defe4fb 100644
--- a/prost-build/src/lib.rs
+++ b/prost-build/src/lib.rs
@@ -880,10 +880,6 @@ 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");
diff --git a/tests/src/build.rs b/tests/src/build.rs
index 334bdc8f4..5f66a5d4a 100644
--- a/tests/src/build.rs
+++ b/tests/src/build.rs
@@ -109,6 +109,18 @@ fn main() {
         .compile_protos(&[src.join("well_known_types.proto")], includes)
         .unwrap();
 
+    let out = std::env::var("OUT_DIR").unwrap();
+    let out_path = PathBuf::from(out).join("wellknown_include");
+
+    std::fs::create_dir_all(&out_path).unwrap();
+
+    prost_build::Config::new()
+        .bytes(&["."])
+        .out_dir(out_path)
+        .include_file("wellknown_include.rs")
+        .compile_protos(&[src.join("well_known_types.proto")], includes)
+        .unwrap();
+
     config
         .compile_protos(
             &[src.join("packages/widget_factory.proto")],
diff --git a/tests/src/well_known_types.rs b/tests/src/well_known_types.rs
index 077833da4..88fa1ec52 100644
--- a/tests/src/well_known_types.rs
+++ b/tests/src/well_known_types.rs
@@ -61,3 +61,11 @@ fn test_timestamp() {
         "hash for normalized should match and not inserted"
     );
 }
+
+#[cfg(feature = "std")]
+mod include {
+    include!(concat!(
+        env!("OUT_DIR"),
+        "/wellknown_include/wellknown_include.rs"
+    ));
+}