Add ability to set --rotation-min-sdk-version for signapk.

Bug: 197787352

Test: m signapk

Change-Id: I3b5e9bb3985c2ae83381499a44b339a7b1deb05c
diff --git a/core/app_prebuilt_internal.mk b/core/app_prebuilt_internal.mk
index 79639a8..f5d213e 100644
--- a/core/app_prebuilt_internal.mk
+++ b/core/app_prebuilt_internal.mk
@@ -142,6 +142,9 @@
 
   $(built_module): $(LOCAL_CERTIFICATE_LINEAGE)
   $(built_module): PRIVATE_CERTIFICATE_LINEAGE := $(LOCAL_CERTIFICATE_LINEAGE)
+
+  $(built_module): $(LOCAL_ROTATION_MIN_SDK_VERSION)
+  $(built_module): PRIVATE_ROTATION_MIN_SDK_VERSION := $(LOCAL_ROTATION_MIN_SDK_VERSION)
 endif
 
 ifneq ($(LOCAL_MODULE_STEM),)
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index a67cca6..2ed7b85 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -263,6 +263,7 @@
 LOCAL_RESOURCE_DIR:=
 LOCAL_RLIB_LIBRARIES:=
 LOCAL_RMTYPEDEFS:=
+LOCAL_ROTATION_MIN_SDK_VERSION:=
 LOCAL_RRO_THEME:=
 LOCAL_RTTI_FLAG:=
 LOCAL_SANITIZE:=
diff --git a/core/definitions.mk b/core/definitions.mk
index c7172ca..00bd336 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2351,6 +2351,7 @@
 $(hide) mv $(1) $(1).unsigned
 $(hide) $(JAVA) -Djava.library.path=$$(dirname $(SIGNAPK_JNI_LIBRARY_PATH)) -jar $(SIGNAPK_JAR) \
     $(if $(strip $(PRIVATE_CERTIFICATE_LINEAGE)), --lineage $(PRIVATE_CERTIFICATE_LINEAGE)) \
+    $(if $(strip $(PRIVATE_ROTATION_MIN_SDK_VERSION)), --rotation-min-sdk-version $(PRIVATE_ROTATION_MIN_SDK_VERSION)) \
     $(PRIVATE_CERTIFICATE) $(PRIVATE_PRIVATE_KEY) \
     $(PRIVATE_ADDITIONAL_CERTIFICATES) $(1).unsigned $(1).signed
 $(hide) mv $(1).signed $(1)
diff --git a/core/package_internal.mk b/core/package_internal.mk
index 9f5a599..730395c 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -469,6 +469,9 @@
 $(LOCAL_BUILT_MODULE): $(LOCAL_CERTIFICATE_LINEAGE)
 $(LOCAL_BUILT_MODULE): PRIVATE_CERTIFICATE_LINEAGE := $(LOCAL_CERTIFICATE_LINEAGE)
 
+$(LOCAL_BUILT_MODULE): $(LOCAL_ROTATION_MIN_SDK_VERSION)
+$(LOCAL_BUILT_MODULE): PRIVATE_ROTATION_MIN_SDK_VERSION := $(LOCAL_ROTATION_MIN_SDK_VERSION)
+
 # Set a actual_partition_tag (calculated in base_rules.mk) for the package.
 PACKAGES.$(LOCAL_PACKAGE_NAME).PARTITION := $(actual_partition_tag)
 
diff --git a/tools/signapk/src/com/android/signapk/SignApk.java b/tools/signapk/src/com/android/signapk/SignApk.java
index 8bf1005..ec55a2c 100644
--- a/tools/signapk/src/com/android/signapk/SignApk.java
+++ b/tools/signapk/src/com/android/signapk/SignApk.java
@@ -1050,6 +1050,7 @@
         boolean signUsingApkSignatureSchemeV2 = true;
         boolean signUsingApkSignatureSchemeV4 = false;
         SigningCertificateLineage certLineage = null;
+        Integer rotationMinSdkVersion = null;
 
         int argstart = 0;
         while (argstart < args.length && args[argstart].startsWith("-")) {
@@ -1092,6 +1093,15 @@
                             "Error reading lineage file: " + e.getMessage());
                 }
                 ++argstart;
+            } else if ("--rotation-min-sdk-version".equals(args[argstart])) {
+                String rotationMinSdkVersionString = args[++argstart];
+                try {
+                    rotationMinSdkVersion = Integer.parseInt(rotationMinSdkVersionString);
+                } catch (NumberFormatException e) {
+                    throw new IllegalArgumentException(
+                            "--rotation-min-sdk-version must be a decimal number: " + rotationMinSdkVersionString);
+                }
+                ++argstart;
             } else {
                 usage();
             }
@@ -1175,15 +1185,22 @@
                     }
                 }
 
-                try (ApkSignerEngine apkSigner =
-                        new DefaultApkSignerEngine.Builder(
-                                createSignerConfigs(privateKey, publicKey), minSdkVersion)
-                                .setV1SigningEnabled(true)
-                                .setV2SigningEnabled(signUsingApkSignatureSchemeV2)
-                                .setOtherSignersSignaturesPreserved(false)
-                                .setCreatedBy("1.0 (Android SignApk)")
-                                .setSigningCertificateLineage(certLineage)
-                                .build()) {
+                DefaultApkSignerEngine.Builder builder = new DefaultApkSignerEngine.Builder(
+                    createSignerConfigs(privateKey, publicKey), minSdkVersion)
+                    .setV1SigningEnabled(true)
+                    .setV2SigningEnabled(signUsingApkSignatureSchemeV2)
+                    .setOtherSignersSignaturesPreserved(false)
+                    .setCreatedBy("1.0 (Android SignApk)");
+
+                if (certLineage != null) {
+                   builder = builder.setSigningCertificateLineage(certLineage);
+                }
+
+                if (rotationMinSdkVersion != null) {
+                   builder = builder.setMinSdkVersionForRotation(rotationMinSdkVersion);
+                }
+
+                try (ApkSignerEngine apkSigner = builder.build()) {
                     // We don't preserve the input APK's APK Signing Block (which contains v2
                     // signatures)
                     apkSigner.inputApkSigningBlock(null);