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

sdk/sdk_test.go

@@ -17,6 +17,7 @@ package sdk
 import (
 	"io/ioutil"
 	"os"
+	"path/filepath"
 	"strings"
 	"testing"
 
@@ -100,6 +101,8 @@ func testSdkContext(t *testing.T, bp string) (*android.TestContext, android.Conf
 		"myapex.pk8":                                 nil,
 		"Test.java":                                  nil,
 		"Test.cpp":                                   nil,
+		"include/Test.h":                             nil,
+		"aidl/foo/bar/Test.aidl":                     nil,
 		"libfoo.so":                                  nil,
 	})
 
@@ -398,7 +401,9 @@ func TestSdkIsCompileMultilibBoth(t *testing.T) {
 	var inputs []string
 	buildParams := ctx.ModuleForTests("mysdk", "android_common").Module().BuildParamsForTests()
 	for _, bp := range buildParams {
-		inputs = append(inputs, bp.Implicits.Strings()...)
+		if bp.Input != nil {
+			inputs = append(inputs, bp.Input.String())
+		}
 	}
 
 	// ensure that both 32/64 outputs are inputs of the sdk snapshot
@@ -406,6 +411,69 @@ func TestSdkIsCompileMultilibBoth(t *testing.T) {
 	ensureListContains(t, inputs, arm64Output.String())
 }
 
+func TestSnapshot(t *testing.T) {
+	ctx, config := testSdk(t, `
+		sdk {
+			name: "mysdk",
+			java_libs: ["myjavalib"],
+			native_shared_libs: ["mynativelib"],
+		}
+
+		java_library {
+			name: "myjavalib",
+			srcs: ["Test.java"],
+			aidl: {
+				export_include_dirs: ["aidl"],
+			},
+			system_modules: "none",
+			sdk_version: "none",
+			compile_dex: true,
+			host_supported: true,
+		}
+
+		cc_library_shared {
+			name: "mynativelib",
+			srcs: [
+				"Test.cpp",
+				"aidl/foo/bar/Test.aidl",
+			],
+			export_include_dirs: ["include"],
+			aidl: {
+				export_aidl_headers: true,
+			},
+			system_shared_libs: [],
+			stl: "none",
+		}
+	`)
+
+	var copySrcs []string
+	var copyDests []string
+	buildParams := ctx.ModuleForTests("mysdk", "android_common").Module().BuildParamsForTests()
+	for _, bp := range buildParams {
+		if bp.Rule.String() == "android/soong/android.Cp" {
+			copySrcs = append(copySrcs, bp.Input.String())
+			copyDests = append(copyDests, bp.Output.Rel()) // rooted at the snapshot root
+		}
+	}
+
+	buildDir := config.BuildDir()
+	ensureListContains(t, copySrcs, "aidl/foo/bar/Test.aidl")
+	ensureListContains(t, copySrcs, "include/Test.h")
+	ensureListContains(t, copySrcs, filepath.Join(buildDir, ".intermediates/mynativelib/android_arm64_armv8-a_core_shared/gen/aidl/aidl/foo/bar/BnTest.h"))
+	ensureListContains(t, copySrcs, filepath.Join(buildDir, ".intermediates/mynativelib/android_arm64_armv8-a_core_shared/gen/aidl/aidl/foo/bar/BpTest.h"))
+	ensureListContains(t, copySrcs, filepath.Join(buildDir, ".intermediates/mynativelib/android_arm64_armv8-a_core_shared/gen/aidl/aidl/foo/bar/Test.h"))
+	ensureListContains(t, copySrcs, filepath.Join(buildDir, ".intermediates/myjavalib/android_common/turbine-combined/myjavalib.jar"))
+	ensureListContains(t, copySrcs, filepath.Join(buildDir, ".intermediates/mynativelib/android_arm64_armv8-a_core_shared/mynativelib.so"))
+
+	ensureListContains(t, copyDests, "aidl/aidl/foo/bar/Test.aidl")
+	ensureListContains(t, copyDests, "arm64/include/include/Test.h")
+	ensureListContains(t, copyDests, "arm64/include_gen/mynativelib/aidl/foo/bar/BnTest.h")
+	ensureListContains(t, copyDests, "arm64/include_gen/mynativelib/aidl/foo/bar/BpTest.h")
+	ensureListContains(t, copyDests, "arm64/include_gen/mynativelib/aidl/foo/bar/Test.h")
+	ensureListContains(t, copyDests, "java/myjavalib.jar")
+	ensureListContains(t, copyDests, "arm64/lib/mynativelib.so")
+}
+
 var buildDir string
 
 func setUp() {