From 92bc05a647c41cccbf01f95034d56a30259d5d59 Mon Sep 17 00:00:00 2001
From: Stefan Wolf <wolf@gradle.com>
Date: Thu, 28 Oct 2021 18:18:23 +0200
Subject: [PATCH] Ignore empty directories for sources

Empty directories should not matter for source files, so let's ignore
them for up-to-date checks as well.
---
 .../com/google/protobuf/gradle/GenerateProtoTask.groovy       | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/groovy/com/google/protobuf/gradle/GenerateProtoTask.groovy b/src/main/groovy/com/google/protobuf/gradle/GenerateProtoTask.groovy
index cf4f606a..0cf3a714 100644
--- a/src/main/groovy/com/google/protobuf/gradle/GenerateProtoTask.groovy
+++ b/src/main/groovy/com/google/protobuf/gradle/GenerateProtoTask.groovy
@@ -50,6 +50,7 @@ import org.gradle.api.provider.Property
 import org.gradle.api.provider.Provider
 import org.gradle.api.provider.ProviderFactory
 import org.gradle.api.tasks.CacheableTask
+import org.gradle.api.tasks.IgnoreEmptyDirectories
 import org.gradle.api.tasks.Input
 import org.gradle.api.tasks.InputFiles
 import org.gradle.api.tasks.Internal
@@ -302,8 +303,9 @@ public abstract class GenerateProtoTask extends DefaultTask {
   }
 
   @SkipWhenEmpty
-  @InputFiles
   @PathSensitive(PathSensitivity.RELATIVE)
+  @IgnoreEmptyDirectories
+  @InputFiles
   FileCollection getSourceFiles() {
     return sourceFiles
   }