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+// Copyright 2023 Google Inc. All rights reserved.
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+//
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+// Licensed under the Apache License, Version 2.0 (the "License");
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+// you may not use this file except in compliance with the License.
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+// You may obtain a copy of the License at
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+//
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+// http://www.apache.org/licenses/LICENSE-2.0
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+//
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+// Unless required by applicable law or agreed to in writing, software
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+// distributed under the License is distributed on an "AS IS" BASIS,
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+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+// See the License for the specific language governing permissions and
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+// limitations under the License.
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+
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+package device_config
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+
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+import (
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+ "android/soong/android"
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+ "fmt"
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+ "github.com/google/blueprint"
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+ "strings"
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+)
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+
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+type DefinitionsModule struct {
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+ android.ModuleBase
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+ android.DefaultableModuleBase
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+
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+ // Properties for "device_config_definitions"
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+ properties struct {
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+ // aconfig files, relative to this Android.bp file
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+ Srcs []string `android:"path"`
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+
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+ // Release config flag namespace
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+ Namespace string
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+
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+ // Values from TARGET_RELEASE / RELEASE_DEVICE_CONFIG_VALUE_SETS
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+ Values []string `blueprint:"mutated"`
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+ }
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+
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+ intermediatePath android.WritablePath
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+ srcJarPath android.WritablePath
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+}
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+
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+func DefinitionsFactory() android.Module {
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+ module := &DefinitionsModule{}
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+
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+ android.InitAndroidModule(module)
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+ android.InitDefaultableModule(module)
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+ module.AddProperties(&module.properties)
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+ // TODO: bp2build
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+ //android.InitBazelModule(module)
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+
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+ return module
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+}
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+
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+type implicitValuesTagType struct {
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+ blueprint.BaseDependencyTag
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+}
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+
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+var implicitValuesTag = implicitValuesTagType{}
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+
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+func (module *DefinitionsModule) DepsMutator(ctx android.BottomUpMutatorContext) {
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+ // Validate Properties
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+ if len(module.properties.Srcs) == 0 {
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+ ctx.PropertyErrorf("srcs", "missing source files")
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+ return
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+ }
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+ if len(module.properties.Namespace) == 0 {
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+ ctx.PropertyErrorf("namespace", "missing namespace property")
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+ }
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+
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+ // Add a dependency on the device_config_value_sets defined in
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+ // RELEASE_DEVICE_CONFIG_VALUE_SETS, and add any device_config_values that
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+ // match our namespace.
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+ valuesFromConfig := ctx.Config().ReleaseDeviceConfigValueSets()
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+ ctx.AddDependency(ctx.Module(), implicitValuesTag, valuesFromConfig...)
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+}
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+
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+func (module *DefinitionsModule) OutputFiles(tag string) (android.Paths, error) {
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+ switch tag {
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+ case ".srcjar":
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+ return []android.Path{module.srcJarPath}, nil
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+ case "":
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+ // The default output of this module is the intermediates format, which is
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+ // not installable and in a private format that no other rules can handle
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+ // correctly.
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+ return []android.Path{module.intermediatePath}, nil
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+ default:
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+ return nil, fmt.Errorf("unsupported device_config_definitions module reference tag %q", tag)
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+ }
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+}
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+
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+func joinAndPrefix(prefix string, values []string) string {
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+ var sb strings.Builder
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+ for _, v := range values {
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+ sb.WriteString(prefix)
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+ sb.WriteString(v)
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+ }
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+ return sb.String()
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+}
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+
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+func (module *DefinitionsModule) GenerateAndroidBuildActions(ctx android.ModuleContext) {
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+ // Get the values that came from the global RELEASE_DEVICE_CONFIG_VALUE_SETS flag
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+ ctx.VisitDirectDeps(func(dep android.Module) {
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+ if !ctx.OtherModuleHasProvider(dep, valueSetProviderKey) {
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+ // Other modules get injected as dependencies too, for example the license modules
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+ return
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+ }
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+ depData := ctx.OtherModuleProvider(dep, valueSetProviderKey).(valueSetProviderData)
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+ valuesFiles, ok := depData.AvailableNamespaces[module.properties.Namespace]
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+ if ok {
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+ for _, path := range valuesFiles {
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+ module.properties.Values = append(module.properties.Values, path.String())
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+ }
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+ }
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+ })
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+
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+ // Intermediate format
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+ inputFiles := android.PathsForModuleSrc(ctx, module.properties.Srcs)
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+ module.intermediatePath = android.PathForModuleOut(ctx, "intermediate.json")
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+ ctx.Build(pctx, android.BuildParams{
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+ Rule: aconfigRule,
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+ Inputs: inputFiles,
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+ Output: module.intermediatePath,
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+ Description: "device_config_definitions",
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+ Args: map[string]string{
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+ "release_version": ctx.Config().ReleaseVersion(),
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+ "namespace": module.properties.Namespace,
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+ "values": joinAndPrefix(" --values ", module.properties.Values),
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+ },
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+ })
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+
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+ // Generated java inside a srcjar
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+ module.srcJarPath = android.PathForModuleGen(ctx, ctx.ModuleName()+".srcjar")
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+ ctx.Build(pctx, android.BuildParams{
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+ Rule: srcJarRule,
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+ Input: module.intermediatePath,
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+ Output: module.srcJarPath,
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+ Description: "device_config.srcjar",
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+ })
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+
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+ // TODO: C++
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+
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+ // Phony target for debugging convenience
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+ ctx.Build(pctx, android.BuildParams{
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+ Rule: blueprint.Phony,
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+ Output: android.PathForPhony(ctx, ctx.ModuleName()),
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+ Inputs: []android.Path{module.srcJarPath}, // TODO: C++
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+ })
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+}
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