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@@ -0,0 +1,63 @@
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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 aconfig
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+
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+import (
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+ "android/soong/android"
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+)
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+
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+// A singleton module that collects all of the aconfig flags declared in the
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+// tree into a single combined file for export to the external flag setting
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+// server (inside Google it's Gantry).
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+//
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+// Note that this is ALL aconfig_declarations modules present in the tree, not just
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+// ones that are relevant to the product currently being built, so that that infra
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+// doesn't need to pull from multiple builds and merge them.
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+func AllAconfigDeclarationsFactory() android.Singleton {
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+ return &allAconfigDeclarationsSingleton{}
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+}
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+
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+type allAconfigDeclarationsSingleton struct {
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+ intermediatePath android.OutputPath
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+}
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+
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+func (this *allAconfigDeclarationsSingleton) GenerateBuildActions(ctx android.SingletonContext) {
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+ // Find all of the aconfig_declarations modules
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+ var cacheFiles android.Paths
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+ ctx.VisitAllModules(func(module android.Module) {
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+ if !ctx.ModuleHasProvider(module, declarationsProviderKey) {
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+ return
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+ }
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+ decl := ctx.ModuleProvider(module, declarationsProviderKey).(declarationsProviderData)
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+ cacheFiles = append(cacheFiles, decl.IntermediatePath)
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+ })
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+
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+ // Generate build action for aconfig
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+ this.intermediatePath = android.PathForIntermediates(ctx, "all_aconfig_declarations.pb")
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+ ctx.Build(pctx, android.BuildParams{
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+ Rule: allDeclarationsRule,
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+ Inputs: cacheFiles,
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+ Output: this.intermediatePath,
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+ Description: "all_aconfig_declarations",
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+ Args: map[string]string{
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+ "cache_files": android.JoinPathsWithPrefix(cacheFiles, "--cache "),
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+ },
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+ })
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+ ctx.Phony("all_aconfig_declarations", this.intermediatePath)
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+}
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+
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+func (this *allAconfigDeclarationsSingleton) MakeVars(ctx android.MakeVarsContext) {
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+ ctx.DistForGoal("droid", this.intermediatePath)
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+}
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