37f900ca7f
The generated module lets us keep the aconfig code in its own pacakge and not infect all of the cc package with aconfig. It's also closer to what bazel is going to do Bug: 283479529 Test: m aconfig_hello_world_cc && adb push $TOP/out/target/product/panther/system/bin/aconfig_hello_world_cc /system/bin && adb shell aconfig_hello_world_cc Change-Id: I2fb9e419939c7ca77b111da9c376af077e2348a9
128 lines
4.2 KiB
Go
128 lines
4.2 KiB
Go
// 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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package aconfig
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import (
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"android/soong/android"
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"android/soong/cc"
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"github.com/google/blueprint"
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"fmt"
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"strings"
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)
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type ccDeclarationsTagType struct {
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blueprint.BaseDependencyTag
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}
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var ccDeclarationsTag = ccDeclarationsTagType{}
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type CcAconfigLibraryProperties struct {
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// name of the aconfig_declarations module to generate a library for
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Aconfig_declarations string
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}
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type CcAconfigLibraryCallbacks struct {
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properties *CcAconfigLibraryProperties
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generatedDir android.WritablePath
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headerDir android.WritablePath
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generatedCpp android.WritablePath
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generatedH android.WritablePath
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}
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func CcAconfigLibraryFactory() android.Module {
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callbacks := &CcAconfigLibraryCallbacks{
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properties: &CcAconfigLibraryProperties{},
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}
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return cc.GeneratedCcLibraryModuleFactory("cc_aconfig_library", callbacks)
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}
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func (this *CcAconfigLibraryCallbacks) GeneratorInit(ctx cc.BaseModuleContext) {
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}
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func (this *CcAconfigLibraryCallbacks) GeneratorProps() []interface{} {
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return []interface{}{this.properties}
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}
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func (this *CcAconfigLibraryCallbacks) GeneratorDeps(ctx cc.DepsContext, deps cc.Deps) cc.Deps {
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// Add a dependency for the declarations module
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declarations := this.properties.Aconfig_declarations
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if len(declarations) == 0 {
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ctx.PropertyErrorf("aconfig_declarations", "aconfig_declarations property required")
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} else {
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ctx.AddDependency(ctx.Module(), ccDeclarationsTag, declarations)
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}
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// Add a dependency for the aconfig flags base library
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deps.SharedLibs = append(deps.SharedLibs, "server_configurable_flags")
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// TODO: It'd be really nice if we could reexport this library and not make everyone do it.
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return deps
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}
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func (this *CcAconfigLibraryCallbacks) GeneratorSources(ctx cc.ModuleContext) cc.GeneratedSource {
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result := cc.GeneratedSource{}
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// Get the values that came from the global RELEASE_ACONFIG_VALUE_SETS flag
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declarationsModules := ctx.GetDirectDepsWithTag(ccDeclarationsTag)
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if len(declarationsModules) != 1 {
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panic(fmt.Errorf("Exactly one aconfig_declarations property required"))
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}
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declarations := ctx.OtherModuleProvider(declarationsModules[0], declarationsProviderKey).(declarationsProviderData)
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// Figure out the generated file paths. This has to match aconfig's codegen_cpp.rs.
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this.generatedDir = android.PathForModuleGen(ctx)
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this.headerDir = android.PathForModuleGen(ctx, "include")
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result.IncludeDirs = []android.Path{this.headerDir}
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result.ReexportedDirs = []android.Path{this.headerDir}
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basename := strings.ReplaceAll(declarations.Package, ".", "_")
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this.generatedCpp = android.PathForModuleGen(ctx, basename+".cc")
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result.Sources = []android.Path{this.generatedCpp}
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this.generatedH = android.PathForModuleGen(ctx, "include", basename+".h")
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result.Headers = []android.Path{this.generatedH}
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return result
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}
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func (this *CcAconfigLibraryCallbacks) GeneratorFlags(ctx cc.ModuleContext, flags cc.Flags, deps cc.PathDeps) cc.Flags {
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return flags
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}
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func (this *CcAconfigLibraryCallbacks) GeneratorBuildActions(ctx cc.ModuleContext, flags cc.Flags, deps cc.PathDeps) {
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// Get the values that came from the global RELEASE_ACONFIG_VALUE_SETS flag
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declarationsModules := ctx.GetDirectDepsWithTag(ccDeclarationsTag)
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if len(declarationsModules) != 1 {
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panic(fmt.Errorf("Exactly one aconfig_declarations property required"))
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}
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declarations := ctx.OtherModuleProvider(declarationsModules[0], declarationsProviderKey).(declarationsProviderData)
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ctx.Build(pctx, android.BuildParams{
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Rule: cppRule,
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Input: declarations.IntermediatePath,
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Outputs: []android.WritablePath{
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this.generatedCpp,
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this.generatedH,
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},
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Description: "cc_aconfig_library",
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Args: map[string]string{
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"gendir": this.generatedDir.String(),
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},
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})
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}
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