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// Copyright 2023 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 aidl_library
import (
"android/soong/android"
"github.com/google/blueprint"
"github.com/google/blueprint/proptools"
)
func init() {
registerAidlLibraryBuildComponents(android.InitRegistrationContext)
}
func registerAidlLibraryBuildComponents(ctx android.RegistrationContext) {
ctx.RegisterModuleType("aidl_library", AidlLibraryFactory)
}
type aidlLibraryProperties struct {
// srcs lists files that are included in this module for aidl compilation
Srcs []string `android:"path"`
// hdrs lists the headers that are imported by srcs but are not compiled by aidl to language binding code
// hdrs is provided to support Bazel migration. It is a no-op until
// we enable input sandbox in aidl compilation action
Hdrs []string `android:"path"`
// The prefix to strip from the paths of the .aidl files
// The remaining path is the package path of the aidl interface
Strip_import_prefix *string
// List of aidl files or aidl_library depended on by the module
Deps []string `android:"arch_variant"`
}
type AidlLibrary struct {
android.ModuleBase
properties aidlLibraryProperties
}
type AidlLibraryInfo struct {
// The direct aidl files of the module
Srcs android.Paths
// The include dirs to the direct aidl files and those provided from aidl_library deps
IncludeDirs android.DepSet
}
// AidlLibraryProvider provides the srcs and the transitive include dirs
var AidlLibraryProvider = blueprint.NewProvider(AidlLibraryInfo{})
func (lib *AidlLibrary) GenerateAndroidBuildActions(ctx android.ModuleContext) {
includeDirsDepSetBuilder := android.NewDepSetBuilder(android.PREORDER)
if len(lib.properties.Srcs) == 0 && len(lib.properties.Hdrs) == 0 {
ctx.ModuleErrorf("at least srcs or hdrs prop must be non-empty")
}
srcs := android.PathsForModuleSrc(ctx, lib.properties.Srcs)
if lib.properties.Strip_import_prefix != nil {
srcs = android.PathsWithModuleSrcSubDir(
ctx,
srcs,
android.String(lib.properties.Strip_import_prefix))
}
includeDir := android.PathForModuleSrc(
ctx,
proptools.StringDefault(lib.properties.Strip_import_prefix, ""),
)
includeDirsDepSetBuilder.Direct(includeDir)
for _, dep := range ctx.GetDirectDepsWithTag(aidlLibraryTag) {
if ctx.OtherModuleHasProvider(dep, AidlLibraryProvider) {
info := ctx.OtherModuleProvider(dep, AidlLibraryProvider).(AidlLibraryInfo)
includeDirsDepSetBuilder.Transitive(&info.IncludeDirs)
}
}
// TODO(b/279960133) Propagate direct and transitive headers/srcs when aidl action sandboxes inputs
ctx.SetProvider(AidlLibraryProvider, AidlLibraryInfo{
Srcs: srcs,
IncludeDirs: *includeDirsDepSetBuilder.Build(),
})
}
// aidl_library contains a list of .aidl files and the strip_import_prefix to
// to strip from the paths of the .aidl files. The sub-path left-over after stripping
// corresponds to the aidl package path the aidl interfaces are scoped in
func AidlLibraryFactory() android.Module {
module := &AidlLibrary{}
module.AddProperties(&module.properties)
android.InitAndroidModule(module)
return module
}
type aidlDependencyTag struct {
blueprint.BaseDependencyTag
}
var aidlLibraryTag = aidlDependencyTag{}
func (lib *AidlLibrary) DepsMutator(ctx android.BottomUpMutatorContext) {
for _, dep := range lib.properties.Deps {
ctx.AddDependency(lib, aidlLibraryTag, dep)
}
}
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