Merge "Call PackageFile for dexpreopt files of APEX bundles." into main
diff --git a/etc/prebuilt_etc.go b/etc/prebuilt_etc.go
index c1a0b9c..c17594b 100644
--- a/etc/prebuilt_etc.go
+++ b/etc/prebuilt_etc.go
@@ -268,17 +268,6 @@
 	return p.outputFilePaths[0]
 }
 
-var _ android.OutputFileProducer = (*PrebuiltEtc)(nil)
-
-func (p *PrebuiltEtc) OutputFiles(tag string) (android.Paths, error) {
-	switch tag {
-	case "":
-		return p.outputFilePaths.Paths(), nil
-	default:
-		return nil, fmt.Errorf("unsupported module reference tag %q", tag)
-	}
-}
-
 func (p *PrebuiltEtc) SubDir() string {
 	if subDir := proptools.String(p.subdirProperties.Sub_dir); subDir != "" {
 		return subDir
@@ -420,6 +409,8 @@
 	for _, ip := range installs {
 		ip.addInstallRules(ctx)
 	}
+
+	ctx.SetOutputFiles(p.outputFilePaths.Paths(), "")
 }
 
 type installProperties struct {
diff --git a/ui/build/build.go b/ui/build/build.go
index 9a9eccd..03d8392 100644
--- a/ui/build/build.go
+++ b/ui/build/build.go
@@ -21,7 +21,6 @@
 	"path/filepath"
 	"sync"
 	"text/template"
-	"time"
 
 	"android/soong/ui/metrics"
 )
@@ -66,9 +65,12 @@
 	// (to allow for source control that uses something other than numbers),
 	// but must be a single word and a valid file name.
 	//
-	// If no BUILD_NUMBER is set, create a useful "I am an engineering build
-	// from this date/time" value.  Make it start with a non-digit so that
-	// anyone trying to parse it as an integer will probably get "0".
+	// If no BUILD_NUMBER is set, create a useful "I am an engineering build"
+	// value.  Make it start with a non-digit so that anyone trying to parse
+	// it as an integer will probably get "0". This value used to contain
+	// a timestamp, but now that more dependencies are tracked in order to
+	// reduce the importance of `m installclean`, changing it every build
+	// causes unnecessary rebuilds for local development.
 	buildNumber, ok := config.environ.Get("BUILD_NUMBER")
 	if ok {
 		writeValueIfChanged(ctx, config, config.OutDir(), "file_name_tag.txt", buildNumber)
@@ -77,7 +79,7 @@
 		if username, ok = config.environ.Get("BUILD_USERNAME"); !ok {
 			ctx.Fatalln("Missing BUILD_USERNAME")
 		}
-		buildNumber = fmt.Sprintf("eng.%.6s.%s", username, time.Now().Format("20060102.150405" /* YYYYMMDD.HHMMSS */))
+		buildNumber = fmt.Sprintf("eng.%.6s.00000000.000000", username)
 		writeValueIfChanged(ctx, config, config.OutDir(), "file_name_tag.txt", username)
 	}
 	// Write the build number to a file so it can be read back in