From ed27322aa5add7090773beb5ca499d869c89aba8 Mon Sep 17 00:00:00 2001
From: Colin Cross <ccross@android.com>
Date: Fri, 15 Sep 2023 15:16:12 -0700
Subject: [PATCH] Enable restat for kapt stubs rules

The output of the kapt stubs rules only change when the public interface
of a kotlin class changes, which makes them a good candidate for restat.
This will prevent some unnecessary reruns of turbine annotation
processing.

Bug: 297356926
Test: builds
Change-Id: I39bd63284fd37058f69a0a3dace1ea5f4f50e8b5
---
 java/kotlin.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/java/kotlin.go b/java/kotlin.go
index 3637e2e71..aa2db0ecd 100644
--- a/java/kotlin.go
+++ b/java/kotlin.go
@@ -145,7 +145,7 @@ var kaptStubs = pctx.AndroidRemoteStaticRule("kaptStubs", android.RemoteRuleSupp
 			`$kaptProcessorPath ` +
 			`$kaptProcessor ` +
 			`-Xbuild-file=$kotlinBuildFile && ` +
-			`${config.SoongZipCmd} -jar -o $out -C $kaptDir/stubs -D $kaptDir/stubs && ` +
+			`${config.SoongZipCmd} -jar -write_if_changed -o $out -C $kaptDir/stubs -D $kaptDir/stubs && ` +
 			`rm -rf "$srcJarDir"`,
 		CommandDeps: []string{
 			"${config.KotlincCmd}",
@@ -157,6 +157,7 @@ var kaptStubs = pctx.AndroidRemoteStaticRule("kaptStubs", android.RemoteRuleSupp
 		},
 		Rspfile:        "$out.rsp",
 		RspfileContent: `$in`,
+		Restat:         true,
 	},
 	"kotlincFlags", "encodedJavacFlags", "kaptProcessorPath", "kaptProcessor",
 	"classpath", "srcJars", "commonSrcFilesArg", "srcJarDir", "kaptDir", "kotlinJvmTarget",