From 74f3f30ae440e545f78ea21fb6053b707aa1d646 Mon Sep 17 00:00:00 2001
From: Justin Yun <justinyun@google.com>
Date: Tue, 7 May 2024 14:32:14 +0900
Subject: Soong filesystem may install aconfig_flags.pb

By setting aconfig_flags: true, soong filesystem module installs the
aconfig_flags.pb file to its etc directory.

We need to define aconfigFilePaths to ModuleBase to store the list of
aconfig file paths that is generated from the GenerateBuildActions().
The aconfigFilePaths are collected when build the filesystem module
to build the aconfig_flags.pb for the filesystem image.

Bug: 335363964
Test: compare the cache list with those generated from make.
Change-Id: Ia32b566bf43174e94b9e610b9503608c6b583899
---
 filesystem/aconfig_files.go | 58 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 filesystem/aconfig_files.go

(limited to 'filesystem/aconfig_files.go')

diff --git a/filesystem/aconfig_files.go b/filesystem/aconfig_files.go
new file mode 100644
index 000000000..44de20237
--- /dev/null
+++ b/filesystem/aconfig_files.go
@@ -0,0 +1,58 @@
+// Copyright (C) 2024 The Android Open Source Project
+//
+// 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 filesystem
+
+import (
+	"android/soong/android"
+	"path/filepath"
+	"strings"
+
+	"github.com/google/blueprint/proptools"
+)
+
+func (f *filesystem) buildAconfigFlagsFiles(ctx android.ModuleContext, builder *android.RuleBuilder, specs map[string]android.PackagingSpec, dir android.Path) {
+	if !proptools.Bool(f.properties.Gen_aconfig_flags_pb) {
+		return
+	}
+
+	aconfigFlagsBuilderPath := android.PathForModuleOut(ctx, "aconfig_flags_builder.sh")
+	aconfigToolPath := ctx.Config().HostToolPath(ctx, "aconfig")
+	cmd := builder.Command().Tool(aconfigFlagsBuilderPath).Implicit(aconfigToolPath)
+
+	installAconfigFlags := filepath.Join(dir.String(), "etc", "aconfig_flags_"+f.partitionName()+".pb")
+
+	var sb strings.Builder
+	sb.WriteString("set -e\n")
+	sb.WriteString(aconfigToolPath.String())
+	sb.WriteString(" dump-cache --dedup --format protobuf --out ")
+	sb.WriteString(installAconfigFlags)
+	sb.WriteString(" \\\n")
+
+	var caches []string
+	for _, ps := range specs {
+		cmd.Implicits(ps.GetAconfigPaths())
+		caches = append(caches, ps.GetAconfigPaths().Strings()...)
+	}
+	caches = android.SortedUniqueStrings(caches)
+
+	for _, cache := range caches {
+		sb.WriteString("  --cache ")
+		sb.WriteString(cache)
+		sb.WriteString(" \\\n")
+	}
+	sb.WriteRune('\n')
+
+	android.WriteExecutableFileRuleVerbatim(ctx, aconfigFlagsBuilderPath, sb.String())
+}
-- 
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