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// Copyright
2024 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 build_flags
import (
"android/soong/android"
"github.com/google/blueprint"
)
const (
outJsonFileName = "build_flags.json"
)
func init() {
registerBuildFlagsModuleType(android.InitRegistrationContext)
}
func registerBuildFlagsModuleType(ctx android.RegistrationContext) {
ctx.RegisterModuleType("build_flags_json", buildFlagsFactory)
}
type buildFlagsProperties struct {
// List of allReleaseConfig files the module depends on.
Deps []string `android:"path"`
}
type buildFlags struct {
android.ModuleBase
properties buildFlagsProperties
outputPath android.Path
}
func buildFlagsFactory() android.Module {
module := &buildFlags{}
module.AddProperties(&module.properties)
android.InitAndroidArchModule(module, android.HostAndDeviceSupported, android.Mult
ilibCommon)
return module
}
func (m *buildFlags) UseGenericConfig() bool {
return false
}
func (m *buildFlags) GenerateAndroidBuildActions(ctx android.ModuleContext) {
// Read the build_flags_<partition>.json file generated by the
// 'release-config' command.
var srcFiles []android.Path
partition := m.PartitionTag(ctx.DeviceConfig())
ctx.VisitDirectDepsProxyWithTag(buildFlagsTag, func(module android.ModuleProxy) {
if dep, ok := android.OtherModuleProvider(ctx, module, ReleaseConfigProviderKey); ok {
switch partition {
case "product":
srcFiles = append(srcFiles, dep.BuildFlagsProductJson)
case "system":
srcFiles = append(srcFiles, dep.BuildFlagsSystemJson)
case "system_ext":
srcFiles = append(srcFiles, dep.BuildFlagsSystemExtJson)
case "vendor":
srcFiles = append(srcFiles, dep.BuildFlagsVendorJson)
default:
ctx.ModuleErrorf("Unknown partition '%s'", partition)
}
} else {
ctx.OtherModuleErrorf(module, "No ReleaseConfigProvider data")
}
})
if len(srcFiles) == 0 {
ctx.ModuleErrorf("Did not find source file for partition %s", partition)
return
} else if len(srcFiles) > 1 {
ctx.ModuleErrorf("Cannot specify more than one dependency for partition %s, found: %v", partition, srcFiles)
return
}
srcPath := srcFiles[0]
outputPath := android.PathForModuleOut(ctx, outJsonFileName)
// The 'release-config' command is called for every build, and generates the
// build_flags_<target_product>-<partition>.json file.
// Update the output file only if the source file is changed.
ctx.Build(pctx, android.BuildParams{
Rule: android.CpIfChangedRule,
Input: srcPath,
Output: outputPath,
})
installPath := android.PathForModuleInstall(ctx, "etc")
ctx.InstallFile(installPath, outJsonFileName, outputPath)
m.outputPath = outputPath
}
func (m *buildFlags) AndroidMkEntries() []android.AndroidMkEntries {
return []android.AndroidMkEntries{android.AndroidMkEntries{
Class: "ETC",
OutputFile: android.OptionalPathForPath(m.outputPath),
}}
}
type buildFlagsDependencyTag struct {
blueprint.BaseDependencyTag
}
var buildFlagsTag = buildFlagsDependencyTag{}
func (m *buildFlags) DepsMutator(ctx android.BottomUpMutatorContext) {
for _, dep := range m.properties.Deps {
ctx.AddDependency(m, buildFlagsTag, dep)
}
}