Use per-app package list to avoid unnecessary dexpreopt.
Starting from aosp/2594905, dexpreopt depends on
`$PRODUCT_OUT/product_packages.txt`. When PRODUCT_PACKAGES changes,
dexpreopt has to rerun for all apps. This is not ideal.
After this change, dexpreopt uses a per-app product_packages.txt that is
filtered by the app's dependencies, and it uses `rsync --checksum` to
prevent the file's mtime from being changed if the contents don't change.
This avoids unnecessary dexpreopt reruns.
Bug: 288218403
Test: m
Test: Change PRODUCT_PACKAGES and see no dexpreopt reruns.
Change-Id: I5788a9ee987dfd0abfd7d91cbcef748452290004
diff --git a/java/app_test.go b/java/app_test.go
index cf7d174..0f98416 100644
--- a/java/app_test.go
+++ b/java/app_test.go
@@ -2697,7 +2697,7 @@
cmd := app.Rule("dexpreopt").RuleParams.Command
android.AssertStringDoesContain(t, "dexpreopt app cmd context", cmd, "--context-json=")
android.AssertStringDoesContain(t, "dexpreopt app cmd product_packages", cmd,
- "--product-packages=out/soong/target/product/test_device/product_packages.txt")
+ "--product-packages=out/soong/.intermediates/app/android_common/dexpreopt/product_packages.txt")
}
func TestDexpreoptBcp(t *testing.T) {
diff --git a/java/dexpreopt.go b/java/dexpreopt.go
index e588c9a..998730e 100644
--- a/java/dexpreopt.go
+++ b/java/dexpreopt.go
@@ -16,6 +16,7 @@
import (
"path/filepath"
+ "sort"
"strings"
"android/soong/android"
@@ -390,11 +391,37 @@
globalSoong := dexpreopt.GetGlobalSoongConfig(ctx)
- // "product_packages.txt" is generated by `build/make/core/Makefile`.
+ // The root "product_packages.txt" is generated by `build/make/core/Makefile`. It contains a list
+ // of all packages that are installed on the device. We use `grep` to filter the list by the app's
+ // dependencies to create a per-app list, and use `rsync --checksum` to prevent the file's mtime
+ // from being changed if the contents don't change. This avoids unnecessary dexpreopt reruns.
productPackages := android.PathForModuleInPartitionInstall(ctx, "", "product_packages.txt")
+ appProductPackages := android.PathForModuleOut(ctx, "dexpreopt", "product_packages.txt")
+ appProductPackagesStaging := appProductPackages.ReplaceExtension(ctx, "txt.tmp")
+ clcNames, _ := dexpreopt.ComputeClassLoaderContextDependencies(dexpreoptConfig.ClassLoaderContexts)
+ sort.Strings(clcNames) // The order needs to be deterministic.
+ productPackagesRule := android.NewRuleBuilder(pctx, ctx)
+ if len(clcNames) > 0 {
+ productPackagesRule.Command().
+ Text("grep -F -x").
+ FlagForEachArg("-e ", clcNames).
+ Input(productPackages).
+ FlagWithOutput("> ", appProductPackagesStaging).
+ Text("|| true")
+ } else {
+ productPackagesRule.Command().
+ Text("rm -f").Output(appProductPackagesStaging).
+ Text("&&").
+ Text("touch").Output(appProductPackagesStaging)
+ }
+ productPackagesRule.Command().
+ Text("rsync --checksum").
+ Input(appProductPackagesStaging).
+ Output(appProductPackages)
+ productPackagesRule.Restat().Build("product_packages", "dexpreopt product_packages")
dexpreoptRule, err := dexpreopt.GenerateDexpreoptRule(
- ctx, globalSoong, global, dexpreoptConfig, productPackages)
+ ctx, globalSoong, global, dexpreoptConfig, appProductPackages)
if err != nil {
ctx.ModuleErrorf("error generating dexpreopt rule: %s", err.Error())
return