SDK snapshot is dist'ed

`m module_sdk dist` produces snapshots of all SDKs in the source tree.
A snapshot is a zip file consists of Android.bp, exported headers,
exported AIDL files, stubs for native libs and jars. The zip file is
expected to be downloaded from the build server and extracted to a
directory (which probably will be
/prebuilts/module_sdks/<module_name>/current).

Bug: 138182343
Test: m (sdk_test.go updated)

Change-Id: Idbe4bc24795fe08f26fc1cf7497028f9d162053a

1 files changed, 17 insertions, 4 deletions

diff --git a/sdk/sdk.go b/sdk/sdk.go
index cb81a1466..4eb3665fb 100644
--- a/sdk/sdk.go
+++ b/sdk/sdk.go
@@ -29,6 +29,7 @@ import (
 )
 
 func init() {
+	pctx.Import("android/soong/android")
 	android.RegisterModuleType("sdk", ModuleFactory)
 	android.RegisterModuleType("sdk_snapshot", SnapshotModuleFactory)
 	android.PreDepsMutators(RegisterPreDepsMutators)
@@ -41,8 +42,7 @@ type sdk struct {
 
 	properties sdkProperties
 
-	updateScript android.OutputPath
-	freezeScript android.OutputPath
+	snapshotFile android.OptionalPath
 }
 
 type sdkProperties struct {
@@ -104,11 +104,24 @@ func (s *sdk) frozenVersions(ctx android.BaseModuleContext) []string {
 }
 
 func (s *sdk) GenerateAndroidBuildActions(ctx android.ModuleContext) {
-	s.buildSnapshotGenerationScripts(ctx)
+	if !s.snapshot() {
+		// We don't need to create a snapshot out of sdk_snapshot.
+		// That doesn't make sense. We need a snapshot to create sdk_snapshot.
+		s.snapshotFile = android.OptionalPathForPath(s.buildSnapshot(ctx))
+	}
 }
 
 func (s *sdk) AndroidMkEntries() android.AndroidMkEntries {
-	return s.androidMkEntriesForScript()
+	if !s.snapshotFile.Valid() {
+		return android.AndroidMkEntries{}
+	}
+
+	return android.AndroidMkEntries{
+		Class:      "FAKE",
+		OutputFile: s.snapshotFile,
+		DistFile:   s.snapshotFile,
+		Include:    "$(BUILD_PHONY_PACKAGE)",
+	}
 }
 
 // RegisterPreDepsMutators registers pre-deps mutators to support modules implementing SdkAware