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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"
)
// A singleton module that collects all of the aconfig flags declared in the
// tree into a single combined file for export to the external flag setting
// server (inside Google it's Gantry).
//
// Note that this is ALL aconfig_declarations modules present in the tree, not just
// ones that are relevant to the product currently being built, so that that infra
// doesn't need to pull from multiple builds and merge them.
func AllAconfigDeclarationsFactory() android.Singleton {
return &allAconfigDeclarationsSingleton{}
}
type allAconfigDeclarationsSingleton struct {
intermediateBinaryProtoPath android.OutputPath
intermediateTextProtoPath android.OutputPath
}
func (this *allAconfigDeclarationsSingleton) GenerateBuildActions(ctx android.SingletonContext) {
// Find all of the aconfig_declarations modules
var packages = make(map[string]int)
var cacheFiles android.Paths
ctx.VisitAllModules(func(module android.Module) {
decl, ok := android.SingletonModuleProvider(ctx, module, android.AconfigDeclarationsProviderKey)
if !ok {
return
}
cacheFiles = append(cacheFiles, decl.IntermediateCacheOutputPath)
packages[decl.Package]++
})
var numOffendingPkg = 0
for pkg, cnt := range packages {
if cnt > 1 {
fmt.Printf("%d aconfig_declarations found for package %s\n", cnt, pkg)
numOffendingPkg++
}
}
if numOffendingPkg > 0 {
panic(fmt.Errorf("Only one aconfig_declarations allowed for each package."))
}
// Generate build action for aconfig (binary proto output)
this.intermediateBinaryProtoPath = android.PathForIntermediates(ctx, "all_aconfig_declarations.pb")
ctx.Build(pctx, android.BuildParams{
Rule: AllDeclarationsRule,
Inputs: cacheFiles,
Output: this.intermediateBinaryProtoPath,
Description: "all_aconfig_declarations",
Args: map[string]string{
"cache_files": android.JoinPathsWithPrefix(cacheFiles, "--cache "),
},
})
ctx.Phony("all_aconfig_declarations", this.intermediateBinaryProtoPath)
// Generate build action for aconfig (text proto output)
this.intermediateTextProtoPath = android.PathForIntermediates(ctx, "all_aconfig_declarations.textproto")
ctx.Build(pctx, android.BuildParams{
Rule: AllDeclarationsRuleTextProto,
Inputs: cacheFiles,
Output: this.intermediateTextProtoPath,
Description: "all_aconfig_declarations_textproto",
Args: map[string]string{
"cache_files": android.JoinPathsWithPrefix(cacheFiles, "--cache "),
},
})
ctx.Phony("all_aconfig_declarations_textproto", this.intermediateTextProtoPath)
}
func (this *allAconfigDeclarationsSingleton) MakeVars(ctx android.MakeVarsContext) {
ctx.DistForGoal("droid", this.intermediateBinaryProtoPath)
for _, goal := range []string{"docs", "droid", "sdk"} {
ctx.DistForGoalWithFilename(goal, this.intermediateBinaryProtoPath, "flags.pb")
ctx.DistForGoalWithFilename(goal, this.intermediateTextProtoPath, "flags.textproto")
}
}
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