copy JNI from AAR files to android_app APK
JNI libs present in AAR files are ignored in the build. If those
libraries are necessary, they must be manually extracted and a
prebuilt_cc_library module must be created for them. Instead, we can
extract these libraries and copy them to an output APK as part of the build.
Bug: 228848794
Test: created android_app that depends on an android_library_import with
JNI embedded, and verified that .so libs are present in APK
Test: created android_app that depends on an android_library which
depends on android_library_import with JNI embedded, and verified
that .so libs are present in APK
Test: verified that multiple .so's from a single architecture are copied
to APK
Test: verified that the absence of a jni/<arch> folder or files in the
folder will cause the Ninja action to error
Change-Id: I242a862d7bd881f7a4a8c23493924d8fe441ea25
diff --git a/java/aar.go b/java/aar.go
index dadfc6a..5c87b20 100644
--- a/java/aar.go
+++ b/java/aar.go
@@ -570,12 +570,24 @@
a.exportedProguardFlagFiles = android.FirstUniquePaths(a.exportedProguardFlagFiles)
a.exportedStaticPackages = android.FirstUniquePaths(a.exportedStaticPackages)
+
+ prebuiltJniPackages := android.Paths{}
+ ctx.VisitDirectDeps(func(module android.Module) {
+ if info, ok := ctx.OtherModuleProvider(module, JniPackageProvider).(JniPackageInfo); ok {
+ prebuiltJniPackages = append(prebuiltJniPackages, info.JniPackages...)
+ }
+ })
+ if len(prebuiltJniPackages) > 0 {
+ ctx.SetProvider(JniPackageProvider, JniPackageInfo{
+ JniPackages: prebuiltJniPackages,
+ })
+ }
}
// android_library builds and links sources into a `.jar` file for the device along with Android resources.
//
// An android_library has a single variant that produces a `.jar` file containing `.class` files that were
-// compiled against the device bootclasspath, along with a `package-res.apk` file containing Android resources compiled
+// compiled against the device bootclasspath, along with a `package-res.apk` file containing Android resources compiled
// with aapt2. This module is not suitable for installing on a device, but can be used as a `static_libs` dependency of
// an android_app module.
func AndroidLibraryFactory() android.Module {
@@ -619,6 +631,10 @@
Libs []string
// If set to true, run Jetifier against .aar file. Defaults to false.
Jetifier *bool
+ // If true, extract JNI libs from AAR archive. These libs will be accessible to android_app modules and
+ // will be passed transitively through android_libraries to an android_app.
+ //TODO(b/241138093) evaluate whether we can have this flag default to true for Bazel conversion
+ Extract_jni *bool
}
type AARImport struct {
@@ -643,7 +659,8 @@
hideApexVariantFromMake bool
- aarPath android.Path
+ aarPath android.Path
+ jniPackages android.Paths
sdkVersion android.SdkSpec
minSdkVersion android.SdkSpec
@@ -751,6 +768,28 @@
ctx.AddVariationDependencies(nil, staticLibTag, a.properties.Static_libs...)
}
+type JniPackageInfo struct {
+ // List of zip files containing JNI libraries
+ // Zip files should have directory structure jni/<arch>/*.so
+ JniPackages android.Paths
+}
+
+var JniPackageProvider = blueprint.NewProvider(JniPackageInfo{})
+
+// Unzip an AAR and extract the JNI libs for $archString.
+var extractJNI = pctx.AndroidStaticRule("extractJNI",
+ blueprint.RuleParams{
+ Command: `rm -rf $out $outDir && touch $out && ` +
+ `unzip -qoDD -d $outDir $in "jni/${archString}/*" && ` +
+ `jni_files=$$(find $outDir/jni -type f) && ` +
+ // print error message if there are no JNI libs for this arch
+ `[ -n "$$jni_files" ] || (echo "ERROR: no JNI libs found for arch ${archString}" && exit 1) && ` +
+ `${config.SoongZipCmd} -o $out -P 'lib/${archString}' ` +
+ `-C $outDir/jni/${archString} $$(echo $$jni_files | xargs -n1 printf " -f %s")`,
+ CommandDeps: []string{"${config.SoongZipCmd}"},
+ },
+ "outDir", "archString")
+
// Unzip an AAR into its constituent files and directories. Any files in Outputs that don't exist in the AAR will be
// touched to create an empty file. The res directory is not extracted, as it will be extracted in its own rule.
var unzipAAR = pctx.AndroidStaticRule("unzipAAR",
@@ -858,6 +897,31 @@
ImplementationAndResourcesJars: android.PathsIfNonNil(a.classpathFile),
ImplementationJars: android.PathsIfNonNil(a.classpathFile),
})
+
+ if proptools.Bool(a.properties.Extract_jni) {
+ for _, t := range ctx.MultiTargets() {
+ arch := t.Arch.Abi[0]
+ path := android.PathForModuleOut(ctx, arch+"_jni.zip")
+ a.jniPackages = append(a.jniPackages, path)
+
+ outDir := android.PathForModuleOut(ctx, "aarForJni")
+ aarPath := android.PathForModuleSrc(ctx, a.properties.Aars[0])
+ ctx.Build(pctx, android.BuildParams{
+ Rule: extractJNI,
+ Input: aarPath,
+ Outputs: android.WritablePaths{path},
+ Description: "extract JNI from AAR",
+ Args: map[string]string{
+ "outDir": outDir.String(),
+ "archString": arch,
+ },
+ })
+ }
+
+ ctx.SetProvider(JniPackageProvider, JniPackageInfo{
+ JniPackages: a.jniPackages,
+ })
+ }
}
func (a *AARImport) HeaderJars() android.Paths {
@@ -906,6 +970,6 @@
android.InitPrebuiltModule(module, &module.properties.Aars)
android.InitApexModule(module)
- InitJavaModule(module, android.DeviceSupported)
+ InitJavaModuleMultiTargets(module, android.DeviceSupported)
return module
}