Handle new filetype 'linker_config'
Handle new filetype 'linker_config' which is configuration for
linkerconfig in json type and convert into protobuf in build time.
Bug: 169634881
Test: Build succeeded and cuttlefish boot succeeded
Change-Id: I56555fc738e6d6600d15a191a24f79a2ee747f52
diff --git a/linkerconfig/linkerconfig.go b/linkerconfig/linkerconfig.go
new file mode 100644
index 0000000..1c44c74
--- /dev/null
+++ b/linkerconfig/linkerconfig.go
@@ -0,0 +1,108 @@
+// Copyright (C) 2020 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 linkerconfig
+
+import (
+ "android/soong/android"
+ "android/soong/etc"
+
+ "github.com/google/blueprint/proptools"
+)
+
+var (
+ pctx = android.NewPackageContext("android/soong/linkerconfig")
+)
+
+func init() {
+ pctx.HostBinToolVariable("conv_linker_config", "conv_linker_config")
+ android.RegisterModuleType("linker_config", linkerConfigFactory)
+}
+
+type linkerConfigProperties struct {
+ // source linker configuration property file
+ Src *string `android:"path"`
+
+ // If set to true, allow module to be installed to one of the partitions.
+ // Default value is true.
+ // Installable should be marked as false for APEX configuration to avoid
+ // conflicts of configuration on /system/etc directory.
+ Installable *bool
+}
+
+type linkerConfig struct {
+ android.ModuleBase
+ properties linkerConfigProperties
+
+ outputFilePath android.OutputPath
+ installDirPath android.InstallPath
+}
+
+// Implement PrebuiltEtcModule interface to fit in APEX prebuilt list.
+var _ etc.PrebuiltEtcModule = (*linkerConfig)(nil)
+
+func (l *linkerConfig) BaseDir() string {
+ return "etc"
+}
+
+func (l *linkerConfig) SubDir() string {
+ return ""
+}
+
+func (l *linkerConfig) OutputFile() android.OutputPath {
+ return l.outputFilePath
+}
+
+func (l *linkerConfig) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+ inputFile := android.PathForModuleSrc(ctx, android.String(l.properties.Src))
+ l.outputFilePath = android.PathForModuleOut(ctx, "linker.config.pb").OutputPath
+ l.installDirPath = android.PathForModuleInstall(ctx, "etc")
+ linkerConfigRule := android.NewRuleBuilder()
+ linkerConfigRule.Command().
+ BuiltTool(ctx, "conv_linker_config").
+ Flag("proto").
+ FlagWithInput("-s ", inputFile).
+ FlagWithOutput("-o ", l.outputFilePath)
+ linkerConfigRule.Build(pctx, ctx, "conv_linker_config",
+ "Generate linker config protobuf "+l.outputFilePath.String())
+
+ if proptools.BoolDefault(l.properties.Installable, true) {
+ ctx.InstallFile(l.installDirPath, l.outputFilePath.Base(), l.outputFilePath)
+ }
+}
+
+// linker_config generates protobuf file from json file. This protobuf file will be used from
+// linkerconfig while generating ld.config.txt. Format of this file can be found from
+// https://android.googlesource.com/platform/system/linkerconfig/+/master/README.md
+func linkerConfigFactory() android.Module {
+ m := &linkerConfig{}
+ m.AddProperties(&m.properties)
+ android.InitAndroidArchModule(m, android.HostAndDeviceSupported, android.MultilibFirst)
+ return m
+}
+
+func (l *linkerConfig) AndroidMkEntries() []android.AndroidMkEntries {
+ installable := proptools.BoolDefault(l.properties.Installable, true)
+ return []android.AndroidMkEntries{android.AndroidMkEntries{
+ Class: "ETC",
+ OutputFile: android.OptionalPathForPath(l.outputFilePath),
+ ExtraEntries: []android.AndroidMkExtraEntriesFunc{
+ func(entries *android.AndroidMkEntries) {
+ entries.SetString("LOCAL_MODULE_PATH", l.installDirPath.ToMakePath().String())
+ entries.SetString("LOCAL_INSTALLED_MODULE_STEM", l.outputFilePath.Base())
+ entries.SetBoolIfTrue("LOCAL_UNINSTALLABLE_MODULE", !installable)
+ },
+ },
+ }}
+}