Add sepolicy_vers for plat_sepolicy_vers.txt
plat_sepolicy_vers.txt stores the version of vendor policy. This change
adds sepolicy_vers module to migrate plat_sepolicy_vers.txt to
Android.bp.
- Device's plat_sepolicy_vers: should be BOARD_SEPOLICY_VERS
- Microdroid's plat_sepolicy_vers: should be PLATFORM_SEPOLICY_VERSION
because all microdroid artifacts are bound to platform
Bug: 33691272
Test: boot device && boot microdroid
Change-Id: Ida293e1cb785b44fa1d01543d52d3f8e15b055c2
diff --git a/build/soong/sepolicy_vers.go b/build/soong/sepolicy_vers.go
new file mode 100644
index 0000000..0d938e7
--- /dev/null
+++ b/build/soong/sepolicy_vers.go
@@ -0,0 +1,114 @@
+// Copyright 2021 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 selinux
+
+import (
+ "fmt"
+
+ "github.com/google/blueprint/proptools"
+
+ "android/soong/android"
+)
+
+func init() {
+ android.RegisterModuleType("sepolicy_vers", sepolicyVersFactory)
+}
+
+// sepolicy_vers prints sepolicy version string to {partition}/etc/selinux.
+func sepolicyVersFactory() android.Module {
+ v := &sepolicyVers{}
+ v.AddProperties(&v.properties)
+ android.InitAndroidArchModule(v, android.DeviceSupported, android.MultilibCommon)
+ return v
+}
+
+type sepolicyVers struct {
+ android.ModuleBase
+ properties sepolicyVersProperties
+ installSource android.Path
+ installPath android.InstallPath
+}
+
+type sepolicyVersProperties struct {
+ // Version to output. Can be "platform" for PLATFORM_SEPOLICY_VERSION, "vendor" for
+ // BOARD_SEPOLICY_VERS
+ Version *string
+
+ // Output file name. Defaults to module name if unspecified.
+ Stem *string
+
+ // Whether this module is directly installable to one of the partitions. Default is true
+ Installable *bool
+}
+
+func (v *sepolicyVers) installable() bool {
+ return proptools.BoolDefault(v.properties.Installable, true)
+}
+
+func (v *sepolicyVers) stem() string {
+ return proptools.StringDefault(v.properties.Stem, v.Name())
+}
+
+func (v *sepolicyVers) DepsMutator(ctx android.BottomUpMutatorContext) {
+ // do nothing
+}
+
+func (v *sepolicyVers) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+ var ver string
+ switch proptools.String(v.properties.Version) {
+ case "platform":
+ ver = ctx.DeviceConfig().PlatformSepolicyVersion()
+ case "vendor":
+ ver = ctx.DeviceConfig().BoardSepolicyVers()
+ default:
+ ctx.PropertyErrorf("version", `should be either "platform" or "vendor"`)
+ }
+
+ out := android.PathForModuleGen(ctx, v.stem())
+
+ rule := android.NewRuleBuilder(pctx, ctx)
+ rule.Command().Text("echo").Text(ver).Text(">").Output(out)
+ rule.Build("sepolicy_vers", v.Name())
+
+ v.installPath = android.PathForModuleInstall(ctx, "etc", "selinux")
+ v.installSource = out
+ ctx.InstallFile(v.installPath, v.stem(), v.installSource)
+
+ if !v.installable() {
+ v.SkipInstall()
+ }
+}
+
+func (v *sepolicyVers) AndroidMkEntries() []android.AndroidMkEntries {
+ return []android.AndroidMkEntries{android.AndroidMkEntries{
+ Class: "ETC",
+ OutputFile: android.OptionalPathForPath(v.installSource),
+ ExtraEntries: []android.AndroidMkExtraEntriesFunc{
+ func(ctx android.AndroidMkExtraEntriesContext, entries *android.AndroidMkEntries) {
+ entries.SetPath("LOCAL_MODULE_PATH", v.installPath.ToMakePath())
+ entries.SetString("LOCAL_INSTALLED_MODULE_STEM", v.stem())
+ },
+ },
+ }}
+}
+
+func (v *sepolicyVers) OutputFiles(tag string) (android.Paths, error) {
+ if tag == "" {
+ return android.Paths{v.installSource}, nil
+ }
+ return nil, fmt.Errorf("Unknown tag %q", tag)
+}
+
+var _ android.OutputFileProducer = (*sepolicyVers)(nil)