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// Copyright 2020 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 cc
import (
"android/soong/android"
"android/soong/genrule"
)
// sdkTransitionMutator creates a platform and an SDK variant for modules
// that set sdk_version, and ignores sdk_version for the platform
// variant. The SDK variant will be used for embedding in APKs
// that may be installed on older platforms. Apexes use their own
// variants that enforce backwards compatibility.
type sdkTransitionMutator struct{}
func (sdkTransitionMutator) Split(ctx android.BaseModuleContext) []string {
if ctx.Os() != android.Android {
return []string{""}
}
switch m := ctx.Module().(type) {
case LinkableInterface:
if m.AlwaysSdk() {
if !m.UseSdk() && !m.SplitPerApiLevel() {
ctx.ModuleErrorf("UseSdk() must return true when AlwaysSdk is set, did the factory forget to set Sdk_version?")
}
return []string{"sdk"}
} else if m.UseSdk() || m.SplitPerApiLevel() {
return []string{"", "sdk"}
} else {
return []string{""}
}
case *genrule.Module:
if p, ok := m.Extra.(*GenruleExtraProperties); ok {
if String(p.Sdk_version) != "" {
return []string{"", "sdk"}
} else {
return []string{""}
}
}
}
return []string{""}
}
func (sdkTransitionMutator) OutgoingTransition(ctx android.OutgoingTransitionContext, sourceVariation string) string {
return sourceVariation
}
func (sdkTransitionMutator) IncomingTransition(ctx android.IncomingTransitionContext, incomingVariation string) string {
if ctx.Os() != android.Android {
return ""
}
switch m := ctx.Module().(type) {
case LinkableInterface:
if m.AlwaysSdk() {
return "sdk"
} else if m.UseSdk() || m.SplitPerApiLevel() {
return incomingVariation
}
case *genrule.Module:
if p, ok := m.Extra.(*GenruleExtraProperties); ok {
if String(p.Sdk_version) != "" {
return incomingVariation
}
}
}
if ctx.IsAddingDependency() {
return incomingVariation
} else {
return ""
}
}
func (sdkTransitionMutator) Mutate(ctx android.BottomUpMutatorContext, variation string) {
if ctx.Os() != android.Android {
return
}
switch m := ctx.Module().(type) {
case LinkableInterface:
ccModule, isCcModule := ctx.Module().(*Module)
if m.AlwaysSdk() {
if variation != "sdk" {
ctx.ModuleErrorf("tried to create variation %q for module with AlwaysSdk set, expected \"sdk\"", variation)
}
ccModule.Properties.IsSdkVariant = true
} else if m.UseSdk() || m.SplitPerApiLevel() {
if variation == "" {
// Clear the sdk_version property for the platform (non-SDK) variant so later code
// doesn't get confused by it.
ccModule.Properties.Sdk_version = nil
} else {
// Mark the SDK variant.
ccModule.Properties.IsSdkVariant = true
// SDK variant never gets installed because the variant is to be embedded in
// APKs, not to be installed to the platform.
ccModule.Properties.PreventInstall = true
}
if ctx.Config().UnbundledBuildApps() {
if variation == "" {
// For an unbundled apps build, hide the platform variant from Make
// so that other Make modules don't link against it, but against the
// SDK variant.
ccModule.Properties.HideFromMake = true
}
} else {
if variation == "sdk" {
// For a platform build, mark the SDK variant so that it gets a ".sdk" suffix when
// exposed to Make.
ccModule.Properties.SdkAndPlatformVariantVisibleToMake = true
}
}
} else {
if isCcModule {
// Clear the sdk_version property for modules that don't have an SDK variant so
// later code doesn't get confused by it.
ccModule.Properties.Sdk_version = nil
}
}
}
}
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