Collect file delta metrics for java and kotlin compiles

- Update the kotlinc and javac build rules to generate changed file
  metrics.
- Upload the aggregated metrics at build completion.
- Also fixes parsing of --inputs_file and --target to be consistent with
  existing use cases.

Bug: b/365537477
Test: manual, TH
Change-Id: I48efe06917baa98081e18b6351b63a624b55dba8

1 files changed, 3 insertions, 0 deletions

diff --git a/java/builder.go b/java/builder.go
index 895ddb6f9..01fbbddf5 100644
--- a/java/builder.go
+++ b/java/builder.go
@@ -46,6 +46,7 @@ var (
 				`mkdir -p "$outDir" "$annoDir" "$srcJarDir" && ` +
 				`${config.ZipSyncCmd} -d $srcJarDir -l $srcJarDir/list -f "*.java" $srcJars && ` +
 				`(if [ -s $srcJarDir/list ] || [ -s $out.rsp ] ; then ` +
+				`${config.FindInputDeltaCmd} --template '' --target "$out" --inputs_file "$out.rsp" && ` +
 				`${config.SoongJavacWrapper} $javaTemplate${config.JavacCmd} ` +
 				`${config.JavacHeapFlags} ${config.JavacVmFlags} ${config.CommonJdkFlags} ` +
 				`$processorpath $processor $javacFlags $bootClasspath $classpath ` +
@@ -55,8 +56,10 @@ var (
 				`$zipTemplate${config.SoongZipCmd} -jar -o $out.tmp -C $outDir -D $outDir && ` +
 				`if ! cmp -s "$out.tmp" "$out"; then mv "$out.tmp" "$out"; fi && ` +
 				`if ! cmp -s "$annoSrcJar.tmp" "$annoSrcJar"; then mv "$annoSrcJar.tmp" "$annoSrcJar"; fi && ` +
+				`if [[ -f "$out.pc_state.new" ]]; then mv "$out.pc_state.new" "$out.pc_state"; fi && ` +
 				`rm -rf "$srcJarDir" "$outDir"`,
 			CommandDeps: []string{
+				"${config.FindInputDeltaCmd}",
 				"${config.JavacCmd}",
 				"${config.SoongZipCmd}",
 				"${config.ZipSyncCmd}",