From e509ccd704f3045bb340b6d19b041ad5833c4936 Mon Sep 17 00:00:00 2001
From: Paul Johnston <pcj@stack.build>
Date: Tue, 25 Nov 2025 17:54:14 -0700
Subject: [PATCH] proto_compiled_sources: do not emit rule if no srcs

---
 pkg/protoc/proto_compiled_sources.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkg/protoc/proto_compiled_sources.go b/pkg/protoc/proto_compiled_sources.go
index 28cab0d26..a9e61bd9e 100644
--- a/pkg/protoc/proto_compiled_sources.go
+++ b/pkg/protoc/proto_compiled_sources.go
@@ -44,6 +44,9 @@ func (s *protoCompiledSources) LoadInfo() rule.LoadInfo {
 
 // ProvideRule implements part of the LanguageRule interface.
 func (s *protoCompiledSources) ProvideRule(cfg *LanguageRuleConfig, config *ProtocConfiguration) RuleProvider {
+	if len(config.Outputs) == 0 {
+		return nil
+	}
 	return &protoCompileRule{
 		kind:            "proto_compiled_sources",
 		nameSuffix:      "compiled_sources",