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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 aconfig
import (
"android/soong/android"
"fmt"
"strings"
"github.com/google/blueprint"
)
// Properties for "aconfig_value_set"
type ValueSetModule struct {
android.ModuleBase
android.DefaultableModuleBase
properties struct {
// aconfig_values modules
Values []string
// Paths to the Android.bp files where the aconfig_values modules are defined.
Srcs []string
}
}
func ValueSetFactory() android.Module {
module := &ValueSetModule{}
android.InitAndroidModule(module)
android.InitDefaultableModule(module)
module.AddProperties(&module.properties)
return module
}
// Dependency tag for values property
type valueSetType struct {
blueprint.BaseDependencyTag
}
var valueSetTag = valueSetType{}
// Provider published by aconfig_value_set
type valueSetProviderData struct {
// The package of each of the
// (map of package --> aconfig_module)
AvailablePackages map[string]android.Paths
}
var valueSetProviderKey = blueprint.NewProvider[valueSetProviderData]()
func (module *ValueSetModule) FindAconfigValuesFromSrc(ctx android.BottomUpMutatorContext) map[string]android.Path {
moduleDir := ctx.ModuleDir()
srcs := android.PathsForModuleSrcExcludes(ctx, module.properties.Srcs, []string{ctx.BlueprintsFile()})
aconfigValuesPrefix := strings.Replace(module.Name(), "aconfig_value_set", "aconfig-values", 1)
moduleNamesSrcMap := make(map[string]android.Path)
for _, src := range srcs {
subDir := strings.TrimPrefix(src.String(), moduleDir+"/")
packageName, _, found := strings.Cut(subDir, "/")
if found {
moduleName := fmt.Sprintf("%s-%s-all", aconfigValuesPrefix, packageName)
moduleNamesSrcMap[moduleName] = src
}
}
return moduleNamesSrcMap
}
func (module *ValueSetModule) DepsMutator(ctx android.BottomUpMutatorContext) {
// TODO: b/366285733 - Replace the file path based solution with more robust solution.
aconfigValuesMap := module.FindAconfigValuesFromSrc(ctx)
for _, moduleName := range android.SortedKeys(aconfigValuesMap) {
if ctx.OtherModuleExists(moduleName) {
ctx.AddDependency(ctx.Module(), valueSetTag, moduleName)
} else {
ctx.ModuleErrorf("module %q not found. Rename the aconfig_values module defined in %q to %q", moduleName, aconfigValuesMap[moduleName], moduleName)
}
}
deps := ctx.AddDependency(ctx.Module(), valueSetTag, module.properties.Values...)
for _, dep := range deps {
_, ok := dep.(*ValuesModule)
if !ok {
ctx.PropertyErrorf("values", "values must be a aconfig_values module")
return
}
}
}
func (module *ValueSetModule) GenerateAndroidBuildActions(ctx android.ModuleContext) {
// Accumulate the packages of the values modules listed, and set that as an
// valueSetProviderKey provider that aconfig modules can read and use
// to append values to their aconfig actions.
packages := make(map[string]android.Paths)
ctx.VisitDirectDeps(func(dep android.Module) {
if depData, ok := android.OtherModuleProvider(ctx, dep, valuesProviderKey); ok {
srcs := make([]android.Path, len(depData.Values))
copy(srcs, depData.Values)
packages[depData.Package] = srcs
}
})
android.SetProvider(ctx, valueSetProviderKey, valueSetProviderData{
AvailablePackages: packages,
})
}
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