From 90c856f6ebedcad13a48980198debca65941b566 Mon Sep 17 00:00:00 2001
From: Eric Anderson <ejona@google.com>
Date: Tue, 5 Sep 2023 08:10:29 -0700
Subject: [PATCH] Clean output directory before extracting protos

If the dependencies change, the old dependency's proto files can be left
around. That is broken and causes confusion. This was noticed in #731
when a `gradle clean` was needed.
---
 .../groovy/com/google/protobuf/gradle/ProtobufExtract.groovy   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/groovy/com/google/protobuf/gradle/ProtobufExtract.groovy b/src/main/groovy/com/google/protobuf/gradle/ProtobufExtract.groovy
index e27715e2..514900e7 100644
--- a/src/main/groovy/com/google/protobuf/gradle/ProtobufExtract.groovy
+++ b/src/main/groovy/com/google/protobuf/gradle/ProtobufExtract.groovy
@@ -84,6 +84,9 @@ abstract class ProtobufExtract extends DefaultTask {
 
   @TaskAction
   public void extract() {
+    copyActionFacade.delete { spec ->
+      spec.delete(destDir)
+    }
     copyActionFacade.copy { spec ->
       spec.includeEmptyDirs = false
       spec.from(inputProtoFiles)