Replace mk_payload with a Java utility
mk_payload was used to create a microdroid's payload metadata blob. It
was too verbose and inefficient to do it via external host tool
(mk_payload).
Bug: 269409253
Test: atest MicrodroidHostTestCases
Change-Id: Ic898e1958be528df2996fe2edb77b4c0b23f04fb
diff --git a/microdroid/payload/Android.bp b/microdroid/payload/Android.bp
index f77c037..da4e09d 100644
--- a/microdroid/payload/Android.bp
+++ b/microdroid/payload/Android.bp
@@ -36,6 +36,17 @@
],
}
+java_library_host {
+ name: "microdroid_payload_metadata",
+ srcs: [
+ "src/**/*.java",
+ "metadata.proto",
+ ],
+ proto: {
+ type: "lite",
+ },
+}
+
cc_binary_host {
name: "mk_payload",
srcs: [
diff --git a/microdroid/payload/metadata.proto b/microdroid/payload/metadata.proto
index c74c23b..6b999af 100644
--- a/microdroid/payload/metadata.proto
+++ b/microdroid/payload/metadata.proto
@@ -18,6 +18,9 @@
package android.microdroid;
+option java_package = "com.android.virt";
+option java_outer_classname = "PayloadMetadataProtos";
+
// Metadata is the body of the "metadata" partition
message Metadata {
uint32 version = 1;
diff --git a/microdroid/payload/src/com/android/virt/PayloadMetadata.java b/microdroid/payload/src/com/android/virt/PayloadMetadata.java
new file mode 100644
index 0000000..c2f0a7f
--- /dev/null
+++ b/microdroid/payload/src/com/android/virt/PayloadMetadata.java
@@ -0,0 +1,49 @@
+package com.android.virt;
+
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+/** Provides utility to create/read/write PayloadMetadata */
+public class PayloadMetadata {
+ public static void write(PayloadMetadataProtos.Metadata metadata, File file)
+ throws IOException {
+ byte[] message = metadata.toByteArray();
+
+ try (DataOutputStream os = new DataOutputStream(new FileOutputStream(file))) {
+ // write length prefix (4-byte, big-endian)
+ os.writeInt(message.length);
+ // write the message
+ os.write(message);
+ }
+ }
+
+ public static PayloadMetadataProtos.Metadata metadata(
+ String configPath,
+ PayloadMetadataProtos.ApkPayload apk,
+ Iterable<? extends PayloadMetadataProtos.ApexPayload> apexes) {
+ return PayloadMetadataProtos.Metadata.newBuilder()
+ .setVersion(1)
+ .setConfigPath(configPath)
+ .setApk(apk)
+ .addAllApexes(apexes)
+ .build();
+ }
+
+ public static PayloadMetadataProtos.ApkPayload apk(String name) {
+ return PayloadMetadataProtos.ApkPayload.newBuilder()
+ .setName(name)
+ .setPayloadPartitionName("microdroid-apk")
+ .setIdsigPartitionName("microdroid-apk-idsig")
+ .build();
+ }
+
+ public static PayloadMetadataProtos.ApexPayload apex(String name) {
+ return PayloadMetadataProtos.ApexPayload.newBuilder()
+ .setName(name)
+ .setIsFactory(true)
+ .setPartitionName(name)
+ .build();
+ }
+}