Disable installation for sdk snapshot versioned prebuilts

The sdk snapshot creates two prebuilts for each member one that is
versioned and one that is not. If they are both installed then they
lead to duplicate rules in make for creating the same installed file.

This change adds an installable property to cc modules that will
prevent the installation of the file and then adds installable: false
on the versioned prebuilt for cc modules.

Bug: 142935992
Test: m nothing
Change-Id: I4cb294c2b0c8a3f411eea569775835d9e41726d6

cc/cc.go

@@ -250,6 +250,8 @@ type BaseProperties struct {
 	// Used by vendor snapshot to record dependencies from snapshot modules.
 	SnapshotSharedLibs  []string `blueprint:"mutated"`
 	SnapshotRuntimeLibs []string `blueprint:"mutated"`
+
+	Installable *bool
 }
 
 type VendorProperties struct {
@@ -371,6 +373,7 @@ type linker interface {
 type installer interface {
 	installerProps() []interface{}
 	install(ctx ModuleContext, path android.Path)
+	everInstallable() bool
 	inData() bool
 	inSanitizerDir() bool
 	hostToolPath() android.OptionalPath
@@ -1488,6 +1491,13 @@ func (c *Module) GenerateAndroidBuildActions(actx android.ModuleContext) {
 		if ctx.Failed() {
 			return
 		}
+	} else if !proptools.BoolDefault(c.Properties.Installable, true) {
+		// If the module has been specifically configure to not be installed then
+		// skip the installation as otherwise it will break when running inside make
+		// as the output path to install will not be specified. Not all uninstallable
+		// modules can skip installation as some are needed for resolving make side
+		// dependencies.
+		c.SkipInstall()
 	}
 }
 
@@ -2629,8 +2639,18 @@ func (c *Module) AvailableFor(what string) bool {
 	}
 }
 
+// Return true if the module is ever installable.
+func (c *Module) EverInstallable() bool {
+	return c.installer != nil &&
+		// Check to see whether the module is actually ever installable.
+		c.installer.everInstallable()
+}
+
 func (c *Module) installable() bool {
-	ret := c.installer != nil && !c.Properties.PreventInstall && c.outputFile.Valid()
+	ret := c.EverInstallable() &&
+		// Check to see whether the module has been configured to not be installed.
+		proptools.BoolDefault(c.Properties.Installable, true) &&
+		!c.Properties.PreventInstall && c.outputFile.Valid()
 
 	// The platform variant doesn't need further condition. Apex variants however might not
 	// be installable because it will likely to be included in the APEX and won't appear

cc/installer.go

@@ -86,6 +86,11 @@ func (installer *baseInstaller) install(ctx ModuleContext, file android.Path) {
 	installer.path = ctx.InstallFile(installer.installDir(ctx), file.Base(), file)
 }
 
+func (installer *baseInstaller) everInstallable() bool {
+	// Most cc modules are installable.
+	return true
+}
+
 func (installer *baseInstaller) inData() bool {
 	return installer.location == InstallInData
 }

cc/library.go

@@ -1220,6 +1220,12 @@ func (library *libraryDecorator) install(ctx ModuleContext, file android.Path) {
 	}
 }
 
+func (library *libraryDecorator) everInstallable() bool {
+	// Only shared and static libraries are installed. Header libraries (which are
+	// neither static or shared) are not installed.
+	return library.shared() || library.static()
+}
+
 func (library *libraryDecorator) static() bool {
 	return library.MutatedProperties.VariantIsStatic
 }

sdk/cc_sdk_test.go

@@ -297,6 +297,7 @@ func TestSnapshotWithCcSharedLibraryCommonProperties(t *testing.T) {
 cc_prebuilt_library_shared {
     name: "mysdk_mynativelib@current",
     sdk_member_name: "mynativelib",
+    installable: false,
     export_include_dirs: ["include/include"],
     arch: {
         arm64: {
@@ -366,6 +367,7 @@ func TestSnapshotWithCcBinary(t *testing.T) {
 cc_prebuilt_binary {
     name: "mymodule_exports_mynativebinary@current",
     sdk_member_name: "mynativebinary",
+    installable: false,
     compile_multilib: "both",
     arch: {
         arm64: {
@@ -447,6 +449,7 @@ cc_prebuilt_binary {
     sdk_member_name: "mynativebinary",
     device_supported: false,
     host_supported: true,
+    installable: false,
     target: {
         linux_glibc: {
             compile_multilib: "both",
@@ -539,6 +542,7 @@ cc_prebuilt_library_shared {
         "apex1",
         "apex2",
     ],
+    installable: false,
     export_include_dirs: ["include/include"],
     arch: {
         arm64: {
@@ -634,6 +638,7 @@ cc_prebuilt_library_shared {
     sdk_member_name: "mynativelib",
     device_supported: false,
     host_supported: true,
+    installable: false,
     sdk_version: "minimum",
     export_include_dirs: ["include/include"],
     arch: {
@@ -735,6 +740,7 @@ cc_prebuilt_library_shared {
     sdk_member_name: "mynativelib",
     device_supported: false,
     host_supported: true,
+    installable: false,
     target: {
         linux_glibc_x86_64: {
             srcs: ["linux_glibc/x86_64/lib/mynativelib.so"],
@@ -814,6 +820,7 @@ func TestSnapshotWithCcStaticLibrary(t *testing.T) {
 cc_prebuilt_library_static {
     name: "myexports_mynativelib@current",
     sdk_member_name: "mynativelib",
+    installable: false,
     export_include_dirs: ["include/include"],
     arch: {
         arm64: {
@@ -904,6 +911,7 @@ cc_prebuilt_library_static {
     sdk_member_name: "mynativelib",
     device_supported: false,
     host_supported: true,
+    installable: false,
     export_include_dirs: ["include/include"],
     arch: {
         x86_64: {
@@ -1003,6 +1011,7 @@ cc_prebuilt_library_static {
     sdk_member_name: "mynativelib",
     device_supported: false,
     host_supported: true,
+    installable: false,
     export_include_dirs: ["include/include"],
     arch: {
         x86_64: {

sdk/update.go

@@ -409,8 +409,19 @@ type propertyTag struct {
 	name string
 }
 
+// A BpPropertyTag to add to a property that contains references to other sdk members.
+//
+// This will cause the references to be rewritten to a versioned reference in the version
+// specific instance of a snapshot module.
 var sdkMemberReferencePropertyTag = propertyTag{"sdkMemberReferencePropertyTag"}
 
+// A BpPropertyTag that indicates the property should only be present in the versioned
+// module.
+//
+// This will cause the property to be removed from the unversioned instance of a
+// snapshot module.
+var sdkVersionedOnlyPropertyTag = propertyTag{"sdkVersionedOnlyPropertyTag"}
+
 type unversionedToVersionedTransformation struct {
 	identityTransformation
 	builder *snapshotBuilder
@@ -452,6 +463,9 @@ func (t unversionedTransformation) transformModule(module *bpModule) *bpModule {
 func (t unversionedTransformation) transformProperty(name string, value interface{}, tag android.BpPropertyTag) (interface{}, android.BpPropertyTag) {
 	if tag == sdkMemberReferencePropertyTag {
 		return t.builder.unversionedSdkMemberNames(value.([]string)), tag
+	} else if tag == sdkVersionedOnlyPropertyTag {
+		// The property is not allowed in the unversioned module so remove it.
+		return nil, nil
 	} else {
 		return value, tag
 	}
@@ -631,6 +645,13 @@ func (s *snapshotBuilder) AddPrebuiltModule(member android.SdkMember, moduleType
 		}
 	}
 
+	// Disable installation in the versioned module of those modules that are ever installable.
+	if installable, ok := variant.(interface{ EverInstallable() bool }); ok {
+		if installable.EverInstallable() {
+			m.AddPropertyWithTag("installable", false, sdkVersionedOnlyPropertyTag)
+		}
+	}
+
 	s.prebuiltModules[name] = m
 	s.prebuiltOrder = append(s.prebuiltOrder, m)
 	return m