Add support for auto-generated characteristics RRO
Setting Generate_product_characteristics_rro will automatically generate
an RRO package which contains resources with
'product="{PRODUCT_CHARACTERISTICS}"'. The RRO package will be installed
to /product partition. The app will be compiled with '--product
default', making the app identical to all targets.
Motivation for this change is to minimize divergence of system.img.
Bug: 294799593
Test: boot and idmap2 dump
Change-Id: I1371f7410a1ecf337e1f73214b024af39aa6d57a
diff --git a/java/aapt2.go b/java/aapt2.go
index 3bb70b5..17ee6ee 100644
--- a/java/aapt2.go
+++ b/java/aapt2.go
@@ -25,17 +25,23 @@
"android/soong/android"
)
+func isPathValueResource(res android.Path) bool {
+ subDir := filepath.Dir(res.String())
+ subDir, lastDir := filepath.Split(subDir)
+ return strings.HasPrefix(lastDir, "values")
+}
+
// Convert input resource file path to output file path.
// values-[config]/<file>.xml -> values-[config]_<file>.arsc.flat;
// For other resource file, just replace the last "/" with "_" and add .flat extension.
func pathToAapt2Path(ctx android.ModuleContext, res android.Path) android.WritablePath {
name := res.Base()
- subDir := filepath.Dir(res.String())
- subDir, lastDir := filepath.Split(subDir)
- if strings.HasPrefix(lastDir, "values") {
+ if isPathValueResource(res) {
name = strings.TrimSuffix(name, ".xml") + ".arsc"
}
+ subDir := filepath.Dir(res.String())
+ subDir, lastDir := filepath.Split(subDir)
name = lastDir + "_" + name + ".flat"
return android.PathForModuleOut(ctx, "aapt2", subDir, name)
}
@@ -63,7 +69,21 @@
// aapt2Compile compiles resources and puts the results in the requested directory.
func aapt2Compile(ctx android.ModuleContext, dir android.Path, paths android.Paths,
- flags []string) android.WritablePaths {
+ flags []string, productToFilter string) android.WritablePaths {
+ if productToFilter != "" && productToFilter != "default" {
+ // --filter-product leaves only product-specific resources. Product-specific resources only exist
+ // in value resources (values/*.xml), so filter value resource files only. Ignore other types of
+ // resources as they don't need to be in product characteristics RRO (and they will cause aapt2
+ // compile errors)
+ filteredPaths := android.Paths{}
+ for _, path := range paths {
+ if isPathValueResource(path) {
+ filteredPaths = append(filteredPaths, path)
+ }
+ }
+ paths = filteredPaths
+ flags = append([]string{"--filter-product " + productToFilter}, flags...)
+ }
// Shard the input paths so that they can be processed in parallel. If we shard them into too
// small chunks, the additional cost of spinning up aapt2 outweighs the performance gain. The