Add java_system_modules to sdk/module_exports

Adds an SdkMemberType implementation for java_system_modules. It
specifies that java_system_modules can be used with sdk as well as
module_exports, and also that the libs property should be included
as transitive members in the sdk.

It also adds support for treating appropriate tagged properties in
the snapshot prebuilts module as references to sdk members so that
they are correctly transformed when creating the versioned modules.

Bug: 142940300
Test: m nothing
Change-Id: Ic10b5a6d5b92b6018334fe876f06feaf79cc55e9
diff --git a/sdk/java_sdk_test.go b/sdk/java_sdk_test.go
index cc893b9..79d3c26 100644
--- a/sdk/java_sdk_test.go
+++ b/sdk/java_sdk_test.go
@@ -583,3 +583,136 @@
 		checkMergeZip(".intermediates/myexports/linux_glibc_common/tmp/java/myjavaapistubs_stubs_sources.zip"),
 	)
 }
+
+func TestSnapshotWithJavaSystemModules(t *testing.T) {
+	result := testSdkWithJava(t, `
+		sdk {
+			name: "mysdk",
+			java_system_modules: ["my-system-modules"],
+		}
+
+		java_system_modules {
+			name: "my-system-modules",
+			libs: ["system-module"],
+		}
+
+		java_library {
+			name: "system-module",
+			srcs: ["Test.java"],
+			sdk_version: "none",
+			system_modules: "none",
+		}
+	`)
+
+	result.CheckSnapshot("mysdk", "android_common", "",
+		checkAndroidBpContents(`
+// This is auto-generated. DO NOT EDIT.
+
+java_import {
+    name: "mysdk_system-module@current",
+    sdk_member_name: "system-module",
+    jars: ["java/system-module.jar"],
+}
+
+java_import {
+    name: "system-module",
+    prefer: false,
+    jars: ["java/system-module.jar"],
+}
+
+java_system_modules_import {
+    name: "mysdk_my-system-modules@current",
+    sdk_member_name: "my-system-modules",
+    libs: ["mysdk_system-module@current"],
+}
+
+java_system_modules_import {
+    name: "my-system-modules",
+    prefer: false,
+    libs: ["system-module"],
+}
+
+sdk_snapshot {
+    name: "mysdk@current",
+    java_system_modules: ["mysdk_my-system-modules@current"],
+}
+`),
+		checkAllCopyRules(".intermediates/system-module/android_common/turbine-combined/system-module.jar -> java/system-module.jar"),
+	)
+}
+
+func TestHostSnapshotWithJavaSystemModules(t *testing.T) {
+	// b/145598135 - Generating host snapshots for anything other than linux is not supported.
+	SkipIfNotLinux(t)
+
+	result := testSdkWithJava(t, `
+		sdk {
+			name: "mysdk",
+			device_supported: false,
+			host_supported: true,
+			java_system_modules: ["my-system-modules"],
+		}
+
+		java_system_modules {
+			name: "my-system-modules",
+			device_supported: false,
+			host_supported: true,
+			libs: ["system-module"],
+		}
+
+		java_library {
+			name: "system-module",
+			device_supported: false,
+			host_supported: true,
+			srcs: ["Test.java"],
+			sdk_version: "none",
+			system_modules: "none",
+		}
+	`)
+
+	result.CheckSnapshot("mysdk", "linux_glibc_common", "",
+		checkAndroidBpContents(`
+// This is auto-generated. DO NOT EDIT.
+
+java_import {
+    name: "mysdk_system-module@current",
+    sdk_member_name: "system-module",
+    device_supported: false,
+    host_supported: true,
+    jars: ["java/system-module.jar"],
+}
+
+java_import {
+    name: "system-module",
+    prefer: false,
+    device_supported: false,
+    host_supported: true,
+    jars: ["java/system-module.jar"],
+}
+
+java_system_modules_import {
+    name: "mysdk_my-system-modules@current",
+    sdk_member_name: "my-system-modules",
+    device_supported: false,
+    host_supported: true,
+    libs: ["mysdk_system-module@current"],
+}
+
+java_system_modules_import {
+    name: "my-system-modules",
+    prefer: false,
+    device_supported: false,
+    host_supported: true,
+    libs: ["system-module"],
+}
+
+sdk_snapshot {
+    name: "mysdk@current",
+    device_supported: false,
+    host_supported: true,
+    java_system_modules: ["mysdk_my-system-modules@current"],
+}
+`),
+		checkAllCopyRules(".intermediates/system-module/linux_glibc_common/javac/system-module.jar -> java/system-module.jar"),
+	)
+}
diff --git a/sdk/testing.go b/sdk/testing.go
index c9cc30f..6102441 100644
--- a/sdk/testing.go
+++ b/sdk/testing.go
@@ -72,6 +72,7 @@
 	java.RegisterJavaBuildComponents(ctx)
 	java.RegisterAppBuildComponents(ctx)
 	java.RegisterStubsBuildComponents(ctx)
+	java.RegisterSystemModulesBuildComponents(ctx)
 
 	// from cc package
 	cc.RegisterRequiredBuildComponentsForTest(ctx)
diff --git a/sdk/update.go b/sdk/update.go
index 7fc7b9a..9032d1f 100644
--- a/sdk/update.go
+++ b/sdk/update.go
@@ -291,13 +291,17 @@
 	return outputZipFile
 }
 
+type propertyTag struct {
+	name string
+}
+
+var sdkMemberReferencePropertyTag = propertyTag{"sdkMemberReferencePropertyTag"}
+
 type unversionedToVersionedTransformation struct {
 	identityTransformation
 	builder *snapshotBuilder
 }
 
-var _ bpTransformer = (*unversionedToVersionedTransformation)(nil)
-
 func (t unversionedToVersionedTransformation) transformModule(module *bpModule) *bpModule {
 	// Use a versioned name for the module but remember the original name for the
 	// snapshot.
@@ -307,6 +311,14 @@
 	return module
 }
 
+func (t unversionedToVersionedTransformation) transformProperty(name string, value interface{}, tag android.BpPropertyTag) (interface{}, android.BpPropertyTag) {
+	if tag == sdkMemberReferencePropertyTag {
+		return t.builder.versionedSdkMemberNames(value.([]string)), tag
+	} else {
+		return value, tag
+	}
+}
+
 func generateBpContents(contents *generatedContents, bpFile *bpFile) {
 	contents.Printfln("// This is auto-generated. DO NOT EDIT.")
 	for _, bpModule := range bpFile.order {
@@ -453,6 +465,10 @@
 	}
 }
 
+func (s *snapshotBuilder) SdkMemberReferencePropertyTag() android.BpPropertyTag {
+	return sdkMemberReferencePropertyTag
+}
+
 // Get a versioned name appropriate for the SDK snapshot version being taken.
 func (s *snapshotBuilder) versionedSdkMemberName(unversionedName string) string {
 	return versionedSdkMemberName(s.ctx, unversionedName, s.version)