java/sdk.go - android_build_soong - Gitiles

 // Copyright 2019 Google Inc. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 package java

 import (
 	"android/soong/android"
 	"android/soong/java/config"
 	"fmt"
 	"path/filepath"
 	"runtime"
 	"sort"
 	"strconv"
 	"strings"

 	"github.com/google/blueprint/pathtools"
 )

 func init() {
 	android.RegisterPreSingletonType("sdk_versions", sdkPreSingletonFactory)
 	android.RegisterSingletonType("sdk", sdkSingletonFactory)
 	android.RegisterMakeVarsProvider(pctx, sdkMakeVars)
 }

 var sdkVersionsKey = android.NewOnceKey("sdkVersionsKey")
 var sdkFrameworkAidlPathKey = android.NewOnceKey("sdkFrameworkAidlPathKey")
 var apiFingerprintPathKey = android.NewOnceKey("apiFingerprintPathKey")

 type sdkContext interface {
 	// sdkVersion eturns the sdk_version property of the current module, or an empty string if it is not set.
 	sdkVersion() string
 	// minSdkVersion returns the min_sdk_version property of the current module, or sdkVersion() if it is not set.
 	minSdkVersion() string
 	// targetSdkVersion returns the target_sdk_version property of the current module, or sdkVersion() if it is not set.
 	targetSdkVersion() string
 }

 func sdkVersionOrDefault(ctx android.BaseContext, v string) string {
 	switch v {
 	case "", "current", "system_current", "test_current", "core_current":
 		return ctx.Config().DefaultAppTargetSdk()
 	default:
 		return v
 	}
 }

 // Returns a sdk version as a number.  For modules targeting an unreleased SDK (meaning it does not yet have a number)
 // it returns android.FutureApiLevel (10000).
 func sdkVersionToNumber(ctx android.BaseContext, v string) (int, error) {
 	switch v {
 	case "", "current", "test_current", "system_current", "core_current":
 		return ctx.Config().DefaultAppTargetSdkInt(), nil
 	default:
 		n := android.GetNumericSdkVersion(v)
 		if i, err := strconv.Atoi(n); err != nil {
 			return -1, fmt.Errorf("invalid sdk version %q", n)
 		} else {
 			return i, nil
 		}
 	}
 }

 func sdkVersionToNumberAsString(ctx android.BaseContext, v string) (string, error) {
 	n, err := sdkVersionToNumber(ctx, v)
 	if err != nil {
 		return "", err
 	}
 	return strconv.Itoa(n), nil
 }

 func decodeSdkDep(ctx android.BaseContext, sdkContext sdkContext) sdkDep {
 	v := sdkContext.sdkVersion()
 	// For PDK builds, use the latest SDK version instead of "current"
 	if ctx.Config().IsPdkBuild() && (v == "" || v == "current") {
 		sdkVersions := ctx.Config().Get(sdkVersionsKey).([]int)
 		latestSdkVersion := 0
 		if len(sdkVersions) > 0 {
 			latestSdkVersion = sdkVersions[len(sdkVersions)-1]
 		}
 		v = strconv.Itoa(latestSdkVersion)
 	}

 	numericSdkVersion, err := sdkVersionToNumber(ctx, v)
 	if err != nil {
 		ctx.PropertyErrorf("sdk_version", "%s", err)
 		return sdkDep{}
 	}

 	toPrebuilt := func(sdk string) sdkDep {
 		var api, v string
 		if strings.Contains(sdk, "_") {
 			t := strings.Split(sdk, "_")
 			api = t[0]
 			v = t[1]
 		} else {
 			api = "public"
 			v = sdk
 		}
 		dir := filepath.Join("prebuilts", "sdk", v, api)
 		jar := filepath.Join(dir, "android.jar")
 		// There's no aidl for other SDKs yet.
 		// TODO(77525052): Add aidl files for other SDKs too.
 		public_dir := filepath.Join("prebuilts", "sdk", v, "public")
 		aidl := filepath.Join(public_dir, "framework.aidl")
 		jarPath := android.ExistentPathForSource(ctx, jar)
 		aidlPath := android.ExistentPathForSource(ctx, aidl)
 		lambdaStubsPath := android.PathForSource(ctx, config.SdkLambdaStubsPath)

 		if (!jarPath.Valid() || !aidlPath.Valid()) && ctx.Config().AllowMissingDependencies() {
 			return sdkDep{
 				invalidVersion: true,
 				modules:        []string{fmt.Sprintf("sdk_%s_%s_android", api, v)},
 			}
 		}

 		if !jarPath.Valid() {
 			ctx.PropertyErrorf("sdk_version", "invalid sdk version %q, %q does not exist", v, jar)
 			return sdkDep{}
 		}

 		if !aidlPath.Valid() {
 			ctx.PropertyErrorf("sdk_version", "invalid sdk version %q, %q does not exist", v, aidl)
 			return sdkDep{}
 		}

 		return sdkDep{
 			useFiles: true,
 			jars:     android.Paths{jarPath.Path(), lambdaStubsPath},
 			aidl:     android.OptionalPathForPath(aidlPath.Path()),
 		}
 	}

 	toModule := func(m, r string, aidl android.Path) sdkDep {
 		ret := sdkDep{
 			useModule:          true,
 			modules:            []string{m, config.DefaultLambdaStubsLibrary},
 			systemModules:      m + "_system_modules",
 			frameworkResModule: r,
 			aidl:               android.OptionalPathForPath(aidl),
 		}

 		if m == "core.current.stubs" {
 			ret.systemModules = "core-system-modules"
 		} else if m == "core.platform.api.stubs" {
 			ret.systemModules = "core-platform-api-stubs-system-modules"
 		}
 		return ret
 	}

 	// Ensures that the specificed system SDK version is one of BOARD_SYSTEMSDK_VERSIONS (for vendor apks)
 	// or PRODUCT_SYSTEMSDK_VERSIONS (for other apks or when BOARD_SYSTEMSDK_VERSIONS is not set)
 	if strings.HasPrefix(v, "system_") && numericSdkVersion != android.FutureApiLevel {
 		allowed_versions := ctx.DeviceConfig().PlatformSystemSdkVersions()
 		if ctx.DeviceSpecific() || ctx.SocSpecific() {
 			if len(ctx.DeviceConfig().SystemSdkVersions()) > 0 {
 				allowed_versions = ctx.DeviceConfig().SystemSdkVersions()
 			}
 		}
 		if len(allowed_versions) > 0 && !android.InList(strconv.Itoa(numericSdkVersion), allowed_versions) {
 			ctx.PropertyErrorf("sdk_version", "incompatible sdk version %q. System SDK version should be one of %q",
 				v, allowed_versions)
 		}
 	}

 	if ctx.Config().UnbundledBuildUsePrebuiltSdks() && v != "" {
 		return toPrebuilt(v)
 	}

 	switch v {
 	case "":
 		return sdkDep{
 			useDefaultLibs:     true,
 			frameworkResModule: "framework-res",
 		}
 	case "current":
 		return toModule("android_stubs_current", "framework-res", sdkFrameworkAidlPath(ctx))
 	case "system_current":
 		return toModule("android_system_stubs_current", "framework-res", sdkFrameworkAidlPath(ctx))
 	case "test_current":
 		return toModule("android_test_stubs_current", "framework-res", sdkFrameworkAidlPath(ctx))
 	case "core_current":
 		return toModule("core.current.stubs", "", nil)
 	default:
 		return toPrebuilt(v)
 	}
 }

 func sdkPreSingletonFactory() android.Singleton {
 	return sdkPreSingleton{}
 }

 type sdkPreSingleton struct{}

 func (sdkPreSingleton) GenerateBuildActions(ctx android.SingletonContext) {
 	sdkJars, err := ctx.GlobWithDeps("prebuilts/sdk/*/public/android.jar", nil)
 	if err != nil {
 		ctx.Errorf("failed to glob prebuilts/sdk/*/public/android.jar: %s", err.Error())
 	}

 	var sdkVersions []int
 	for _, sdkJar := range sdkJars {
 		dir := filepath.Base(filepath.Dir(filepath.Dir(sdkJar)))
 		v, err := strconv.Atoi(dir)
 		if scerr, ok := err.(*strconv.NumError); ok && scerr.Err == strconv.ErrSyntax {
 			continue
 		} else if err != nil {
 			ctx.Errorf("invalid sdk jar %q, %s, %v", sdkJar, err.Error())
 		}
 		sdkVersions = append(sdkVersions, v)
 	}

 	sort.Ints(sdkVersions)

 	ctx.Config().Once(sdkVersionsKey, func() interface{} { return sdkVersions })
 }

 func sdkSingletonFactory() android.Singleton {
 	return sdkSingleton{}
 }

 type sdkSingleton struct{}

 func (sdkSingleton) GenerateBuildActions(ctx android.SingletonContext) {
 	if ctx.Config().UnbundledBuildUsePrebuiltSdks() || ctx.Config().IsPdkBuild() {
 		return
 	}

 	createSdkFrameworkAidl(ctx)
 	createAPIFingerprint(ctx)
 }

 // Create framework.aidl by extracting anything that implements android.os.Parcelable from the SDK stubs modules.
 func createSdkFrameworkAidl(ctx android.SingletonContext) {
 	stubsModules := []string{
 		"android_stubs_current",
 		"android_test_stubs_current",
 		"android_system_stubs_current",
 	}

 	stubsJars := make([]android.Paths, len(stubsModules))

 	ctx.VisitAllModules(func(module android.Module) {
 		// Collect dex jar paths for the modules listed above.
 		if j, ok := module.(Dependency); ok {
 			name := ctx.ModuleName(module)
 			if i := android.IndexList(name, stubsModules); i != -1 {
 				stubsJars[i] = j.HeaderJars()
 			}
 		}
 	})

 	var missingDeps []string

 	for i := range stubsJars {
 		if stubsJars[i] == nil {
 			if ctx.Config().AllowMissingDependencies() {
 				missingDeps = append(missingDeps, stubsModules[i])
 			} else {
 				ctx.Errorf("failed to find dex jar path for module %q",
 					stubsModules[i])
 			}
 		}
 	}

 	rule := android.NewRuleBuilder()
 	rule.MissingDeps(missingDeps)

 	var aidls android.Paths
 	for _, jars := range stubsJars {
 		for _, jar := range jars {
 			aidl := android.PathForOutput(ctx, "aidl", pathtools.ReplaceExtension(jar.Base(), "aidl"))

 			rule.Command().
 				Text("rm -f").Output(aidl)
 			rule.Command().
 				Tool(ctx.Config().HostToolPath(ctx, "sdkparcelables")).
 				Input(jar).
 				Output(aidl)

 			aidls = append(aidls, aidl)
 		}
 	}

 	combinedAidl := sdkFrameworkAidlPath(ctx)
 	tempPath := combinedAidl.ReplaceExtension(ctx, "aidl.tmp")

 	rule.Command().
 		Text("rm -f").Output(tempPath)
 	rule.Command().
 		Text("cat").
 		Inputs(aidls).
 		Text("| sort -u >").
 		Output(tempPath)

 	commitChangeForRestat(rule, tempPath, combinedAidl)

 	rule.Build(pctx, ctx, "framework_aidl", "generate framework.aidl")
 }

 func sdkFrameworkAidlPath(ctx android.PathContext) android.OutputPath {
 	return ctx.Config().Once(sdkFrameworkAidlPathKey, func() interface{} {
 		return android.PathForOutput(ctx, "framework.aidl")
 	}).(android.OutputPath)
 }

 // Create api_fingerprint.txt
 func createAPIFingerprint(ctx android.SingletonContext) {
 	out := ApiFingerprintPath(ctx)

 	rule := android.NewRuleBuilder()

 	rule.Command().
 		Text("rm -f").Output(out)
 	cmd := rule.Command()

 	if ctx.Config().PlatformSdkCodename() == "REL" {
 		cmd.Text("echo REL >").Output(out)
 	} else if ctx.Config().IsPdkBuild() {
 		// TODO: get this from the PDK artifacts?
 		cmd.Text("echo PDK >").Output(out)
 	} else if !ctx.Config().UnbundledBuildUsePrebuiltSdks() {
 		in, err := ctx.GlobWithDeps("frameworks/base/api/*current.txt", nil)
 		if err != nil {
 			ctx.Errorf("error globbing API files: %s", err)
 		}

 		cmd.Text("cat").
 			Inputs(android.PathsForSource(ctx, in)).
 			Text("|")

 		if runtime.GOOS == "darwin" {
 			cmd.Text("md5")
 		} else {
 			cmd.Text("md5sum")
 		}

 		cmd.Text("| cut -d' ' -f1 >").
 			Output(out)
 	} else {
 		// Unbundled build
 		// TODO: use a prebuilt api_fingerprint.txt from prebuilts/sdk/current.txt once we have one
 		cmd.Text("echo").
 			Flag(ctx.Config().PlatformPreviewSdkVersion()).
 			Text(">").
 			Output(out)
 	}

 	rule.Build(pctx, ctx, "api_fingerprint", "generate api_fingerprint.txt")
 }

 func ApiFingerprintPath(ctx android.PathContext) android.OutputPath {
 	return ctx.Config().Once(apiFingerprintPathKey, func() interface{} {
 		return android.PathForOutput(ctx, "api_fingerprint.txt")
 	}).(android.OutputPath)
 }

 func sdkMakeVars(ctx android.MakeVarsContext) {
 	if ctx.Config().UnbundledBuildUsePrebuiltSdks() || ctx.Config().IsPdkBuild() {
 		return
 	}

 	ctx.Strict("FRAMEWORK_AIDL", sdkFrameworkAidlPath(ctx).String())
 	ctx.Strict("API_FINGERPRINT", ApiFingerprintPath(ctx).String())
 }
	// Copyright 2019 Google Inc. All rights reserved.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	package java

	import (
	"android/soong/android"
	"android/soong/java/config"
	"fmt"
	"path/filepath"
	"runtime"
	"sort"
	"strconv"
	"strings"

	"github.com/google/blueprint/pathtools"
	)

	func init() {
	android.RegisterPreSingletonType("sdk_versions", sdkPreSingletonFactory)
	android.RegisterSingletonType("sdk", sdkSingletonFactory)
	android.RegisterMakeVarsProvider(pctx, sdkMakeVars)
	}

	var sdkVersionsKey = android.NewOnceKey("sdkVersionsKey")
	var sdkFrameworkAidlPathKey = android.NewOnceKey("sdkFrameworkAidlPathKey")
	var apiFingerprintPathKey = android.NewOnceKey("apiFingerprintPathKey")

	type sdkContext interface {
	// sdkVersion eturns the sdk_version property of the current module, or an empty string if it is not set.
	sdkVersion() string
	// minSdkVersion returns the min_sdk_version property of the current module, or sdkVersion() if it is not set.
	minSdkVersion() string
	// targetSdkVersion returns the target_sdk_version property of the current module, or sdkVersion() if it is not set.
	targetSdkVersion() string
	}

	func sdkVersionOrDefault(ctx android.BaseContext, v string) string {
	switch v {
	case "", "current", "system_current", "test_current", "core_current":
	return ctx.Config().DefaultAppTargetSdk()
	default:
	return v
	}
	}

	// Returns a sdk version as a number. For modules targeting an unreleased SDK (meaning it does not yet have a number)
	// it returns android.FutureApiLevel (10000).
	func sdkVersionToNumber(ctx android.BaseContext, v string) (int, error) {
	switch v {
	case "", "current", "test_current", "system_current", "core_current":
	return ctx.Config().DefaultAppTargetSdkInt(), nil
	default:
	n := android.GetNumericSdkVersion(v)
	if i, err := strconv.Atoi(n); err != nil {
	return -1, fmt.Errorf("invalid sdk version %q", n)
	} else {
	return i, nil
	}
	}
	}

	func sdkVersionToNumberAsString(ctx android.BaseContext, v string) (string, error) {
	n, err := sdkVersionToNumber(ctx, v)
	if err != nil {
	return "", err
	}
	return strconv.Itoa(n), nil
	}

	func decodeSdkDep(ctx android.BaseContext, sdkContext sdkContext) sdkDep {
	v := sdkContext.sdkVersion()
	// For PDK builds, use the latest SDK version instead of "current"
	if ctx.Config().IsPdkBuild() && (v == "" \|\| v == "current") {
	sdkVersions := ctx.Config().Get(sdkVersionsKey).([]int)
	latestSdkVersion := 0
	if len(sdkVersions) > 0 {
	latestSdkVersion = sdkVersions[len(sdkVersions)-1]
	}
	v = strconv.Itoa(latestSdkVersion)
	}

	numericSdkVersion, err := sdkVersionToNumber(ctx, v)
	if err != nil {
	ctx.PropertyErrorf("sdk_version", "%s", err)
	return sdkDep{}
	}

	toPrebuilt := func(sdk string) sdkDep {
	var api, v string
	if strings.Contains(sdk, "_") {
	t := strings.Split(sdk, "_")
	api = t[0]
	v = t[1]
	} else {
	api = "public"
	v = sdk
	}
	dir := filepath.Join("prebuilts", "sdk", v, api)
	jar := filepath.Join(dir, "android.jar")
	// There's no aidl for other SDKs yet.
	// TODO(77525052): Add aidl files for other SDKs too.
	public_dir := filepath.Join("prebuilts", "sdk", v, "public")
	aidl := filepath.Join(public_dir, "framework.aidl")
	jarPath := android.ExistentPathForSource(ctx, jar)
	aidlPath := android.ExistentPathForSource(ctx, aidl)
	lambdaStubsPath := android.PathForSource(ctx, config.SdkLambdaStubsPath)

	if (!jarPath.Valid() \|\| !aidlPath.Valid()) && ctx.Config().AllowMissingDependencies() {
	return sdkDep{
	invalidVersion: true,
	modules: []string{fmt.Sprintf("sdk_%s_%s_android", api, v)},
	}
	}

	if !jarPath.Valid() {
	ctx.PropertyErrorf("sdk_version", "invalid sdk version %q, %q does not exist", v, jar)
	return sdkDep{}
	}

	if !aidlPath.Valid() {
	ctx.PropertyErrorf("sdk_version", "invalid sdk version %q, %q does not exist", v, aidl)
	return sdkDep{}
	}

	return sdkDep{
	useFiles: true,
	jars: android.Paths{jarPath.Path(), lambdaStubsPath},
	aidl: android.OptionalPathForPath(aidlPath.Path()),
	}
	}

	toModule := func(m, r string, aidl android.Path) sdkDep {
	ret := sdkDep{
	useModule: true,
	modules: []string{m, config.DefaultLambdaStubsLibrary},
	systemModules: m + "_system_modules",
	frameworkResModule: r,
	aidl: android.OptionalPathForPath(aidl),
	}

	if m == "core.current.stubs" {
	ret.systemModules = "core-system-modules"
	} else if m == "core.platform.api.stubs" {
	ret.systemModules = "core-platform-api-stubs-system-modules"
	}
	return ret
	}

	// Ensures that the specificed system SDK version is one of BOARD_SYSTEMSDK_VERSIONS (for vendor apks)
	// or PRODUCT_SYSTEMSDK_VERSIONS (for other apks or when BOARD_SYSTEMSDK_VERSIONS is not set)
	if strings.HasPrefix(v, "system_") && numericSdkVersion != android.FutureApiLevel {
	allowed_versions := ctx.DeviceConfig().PlatformSystemSdkVersions()
	if ctx.DeviceSpecific() \|\| ctx.SocSpecific() {
	if len(ctx.DeviceConfig().SystemSdkVersions()) > 0 {
	allowed_versions = ctx.DeviceConfig().SystemSdkVersions()
	}
	}
	if len(allowed_versions) > 0 && !android.InList(strconv.Itoa(numericSdkVersion), allowed_versions) {
	ctx.PropertyErrorf("sdk_version", "incompatible sdk version %q. System SDK version should be one of %q",
	v, allowed_versions)
	}
	}

	if ctx.Config().UnbundledBuildUsePrebuiltSdks() && v != "" {
	return toPrebuilt(v)
	}

	switch v {
	case "":
	return sdkDep{
	useDefaultLibs: true,
	frameworkResModule: "framework-res",
	}
	case "current":
	return toModule("android_stubs_current", "framework-res", sdkFrameworkAidlPath(ctx))
	case "system_current":
	return toModule("android_system_stubs_current", "framework-res", sdkFrameworkAidlPath(ctx))
	case "test_current":
	return toModule("android_test_stubs_current", "framework-res", sdkFrameworkAidlPath(ctx))
	case "core_current":
	return toModule("core.current.stubs", "", nil)
	default:
	return toPrebuilt(v)
	}
	}

	func sdkPreSingletonFactory() android.Singleton {
	return sdkPreSingleton{}
	}

	type sdkPreSingleton struct{}

	func (sdkPreSingleton) GenerateBuildActions(ctx android.SingletonContext) {
	sdkJars, err := ctx.GlobWithDeps("prebuilts/sdk/*/public/android.jar", nil)
	if err != nil {
	ctx.Errorf("failed to glob prebuilts/sdk/*/public/android.jar: %s", err.Error())
	}

	var sdkVersions []int
	for _, sdkJar := range sdkJars {
	dir := filepath.Base(filepath.Dir(filepath.Dir(sdkJar)))
	v, err := strconv.Atoi(dir)
	if scerr, ok := err.(*strconv.NumError); ok && scerr.Err == strconv.ErrSyntax {
	continue
	} else if err != nil {
	ctx.Errorf("invalid sdk jar %q, %s, %v", sdkJar, err.Error())
	}
	sdkVersions = append(sdkVersions, v)
	}

	sort.Ints(sdkVersions)

	ctx.Config().Once(sdkVersionsKey, func() interface{} { return sdkVersions })
	}

	func sdkSingletonFactory() android.Singleton {
	return sdkSingleton{}
	}

	type sdkSingleton struct{}

	func (sdkSingleton) GenerateBuildActions(ctx android.SingletonContext) {
	if ctx.Config().UnbundledBuildUsePrebuiltSdks() \|\| ctx.Config().IsPdkBuild() {
	return
	}

	createSdkFrameworkAidl(ctx)
	createAPIFingerprint(ctx)
	}

	// Create framework.aidl by extracting anything that implements android.os.Parcelable from the SDK stubs modules.
	func createSdkFrameworkAidl(ctx android.SingletonContext) {
	stubsModules := []string{
	"android_stubs_current",
	"android_test_stubs_current",
	"android_system_stubs_current",
	}

	stubsJars := make([]android.Paths, len(stubsModules))

	ctx.VisitAllModules(func(module android.Module) {
	// Collect dex jar paths for the modules listed above.
	if j, ok := module.(Dependency); ok {
	name := ctx.ModuleName(module)
	if i := android.IndexList(name, stubsModules); i != -1 {
	stubsJars[i] = j.HeaderJars()
	}
	}
	})

	var missingDeps []string

	for i := range stubsJars {
	if stubsJars[i] == nil {
	if ctx.Config().AllowMissingDependencies() {
	missingDeps = append(missingDeps, stubsModules[i])
	} else {
	ctx.Errorf("failed to find dex jar path for module %q",
	stubsModules[i])
	}
	}
	}

	rule := android.NewRuleBuilder()
	rule.MissingDeps(missingDeps)

	var aidls android.Paths
	for _, jars := range stubsJars {
	for _, jar := range jars {
	aidl := android.PathForOutput(ctx, "aidl", pathtools.ReplaceExtension(jar.Base(), "aidl"))

	rule.Command().
	Text("rm -f").Output(aidl)
	rule.Command().
	Tool(ctx.Config().HostToolPath(ctx, "sdkparcelables")).
	Input(jar).
	Output(aidl)

	aidls = append(aidls, aidl)
	}
	}

	combinedAidl := sdkFrameworkAidlPath(ctx)
	tempPath := combinedAidl.ReplaceExtension(ctx, "aidl.tmp")

	rule.Command().
	Text("rm -f").Output(tempPath)
	rule.Command().
	Text("cat").
	Inputs(aidls).
	Text("\| sort -u >").
	Output(tempPath)

	commitChangeForRestat(rule, tempPath, combinedAidl)

	rule.Build(pctx, ctx, "framework_aidl", "generate framework.aidl")
	}

	func sdkFrameworkAidlPath(ctx android.PathContext) android.OutputPath {
	return ctx.Config().Once(sdkFrameworkAidlPathKey, func() interface{} {
	return android.PathForOutput(ctx, "framework.aidl")
	}).(android.OutputPath)
	}

	// Create api_fingerprint.txt
	func createAPIFingerprint(ctx android.SingletonContext) {
	out := ApiFingerprintPath(ctx)

	rule := android.NewRuleBuilder()

	rule.Command().
	Text("rm -f").Output(out)
	cmd := rule.Command()

	if ctx.Config().PlatformSdkCodename() == "REL" {
	cmd.Text("echo REL >").Output(out)
	} else if ctx.Config().IsPdkBuild() {
	// TODO: get this from the PDK artifacts?
	cmd.Text("echo PDK >").Output(out)
	} else if !ctx.Config().UnbundledBuildUsePrebuiltSdks() {
	in, err := ctx.GlobWithDeps("frameworks/base/api/*current.txt", nil)
	if err != nil {
	ctx.Errorf("error globbing API files: %s", err)
	}

	cmd.Text("cat").
	Inputs(android.PathsForSource(ctx, in)).
	Text("\|")

	if runtime.GOOS == "darwin" {
	cmd.Text("md5")
	} else {
	cmd.Text("md5sum")
	}

	cmd.Text("\| cut -d' ' -f1 >").
	Output(out)
	} else {
	// Unbundled build
	// TODO: use a prebuilt api_fingerprint.txt from prebuilts/sdk/current.txt once we have one
	cmd.Text("echo").
	Flag(ctx.Config().PlatformPreviewSdkVersion()).
	Text(">").
	Output(out)
	}

	rule.Build(pctx, ctx, "api_fingerprint", "generate api_fingerprint.txt")
	}

	func ApiFingerprintPath(ctx android.PathContext) android.OutputPath {
	return ctx.Config().Once(apiFingerprintPathKey, func() interface{} {
	return android.PathForOutput(ctx, "api_fingerprint.txt")
	}).(android.OutputPath)
	}

	func sdkMakeVars(ctx android.MakeVarsContext) {
	if ctx.Config().UnbundledBuildUsePrebuiltSdks() \|\| ctx.Config().IsPdkBuild() {
	return
	}

	ctx.Strict("FRAMEWORK_AIDL", sdkFrameworkAidlPath(ctx).String())
	ctx.Strict("API_FINGERPRINT", ApiFingerprintPath(ctx).String())
	}