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Add support for auto-generated characteristics RRO

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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
This commit is contained in:
Inseob Kim
2023-11-07 13:37:14 +09:00
parent 5876a78543
commit 34dc4cd738
4 changed files with 111 additions and 7 deletions
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28
java/aapt2.go
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@@ -25,17 +25,23 @@ import (
"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 @@ var aapt2CompileRule = pctx.AndroidStaticRule("aapt2Compile",
// 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