Add se_compat_cil module
Installs backwards compatibility cil files.
Bug: 183362912
Test: Presubmit
Test: Add a $(ver).compat.cil under SYSTEM_EXT_PRIVATE_SEPOLICY_DIR and
verify the file is installed under /system_ext/etc/selinux/mapping/
Change-Id: I5e2c6b8dfa8df431edfe96f29daae463b130367f
diff --git a/build/soong/Android.bp b/build/soong/Android.bp
index aa6ad71..6a52fe5 100644
--- a/build/soong/Android.bp
+++ b/build/soong/Android.bp
@@ -33,6 +33,7 @@
srcs: [
"build_files.go",
"cil_compat_map.go",
+ "compat_cil.go",
"filegroup.go",
"policy.go",
"selinux.go",
diff --git a/build/soong/compat_cil.go b/build/soong/compat_cil.go
new file mode 100644
index 0000000..230fdc3
--- /dev/null
+++ b/build/soong/compat_cil.go
@@ -0,0 +1,113 @@
+// 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 (
+ "github.com/google/blueprint/proptools"
+
+ "android/soong/android"
+)
+
+func init() {
+ android.RegisterModuleType("se_compat_cil", compatCilFactory)
+}
+
+// se_compat_cil collects and installs backwards compatibility cil files.
+func compatCilFactory() android.Module {
+ c := &compatCil{}
+ c.AddProperties(&c.properties)
+ android.InitAndroidArchModule(c, android.DeviceSupported, android.MultilibCommon)
+ return c
+}
+
+type compatCil struct {
+ android.ModuleBase
+ properties compatCilProperties
+ installSource android.Path
+ installPath android.InstallPath
+}
+
+type compatCilProperties struct {
+ // List of source files. Can reference se_filegroup type modules with the ":module" syntax.
+ Srcs []string
+
+ // Output file name. Defaults to module name if unspecified.
+ Stem *string
+}
+
+func (c *compatCil) stem() string {
+ return proptools.StringDefault(c.properties.Stem, c.Name())
+}
+
+func (c *compatCil) expandSeSources(ctx android.ModuleContext) android.Paths {
+ srcPaths := make(android.Paths, 0, len(c.properties.Srcs))
+ for _, src := range c.properties.Srcs {
+ if m := android.SrcIsModule(src); m != "" {
+ module := ctx.GetDirectDepWithTag(m, android.SourceDepTag)
+ if module == nil {
+ // Error would have been handled by ExtractSourcesDeps
+ continue
+ }
+ if fg, ok := module.(*fileGroup); ok {
+ if c.SystemExtSpecific() {
+ srcPaths = append(srcPaths, fg.SystemExtPrivateSrcs()...)
+ } else {
+ srcPaths = append(srcPaths, fg.SystemPrivateSrcs()...)
+ }
+ } else {
+ ctx.PropertyErrorf("srcs", "%q is not an se_filegroup", m)
+ }
+ } else {
+ srcPaths = append(srcPaths, android.PathForModuleSrc(ctx, src))
+ }
+ }
+ return srcPaths
+}
+
+func (c *compatCil) DepsMutator(ctx android.BottomUpMutatorContext) {
+ android.ExtractSourcesDeps(ctx, c.properties.Srcs)
+}
+
+func (c *compatCil) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+ if c.ProductSpecific() || c.SocSpecific() || c.DeviceSpecific() {
+ ctx.ModuleErrorf("Compat cil files only support system and system_ext partitions")
+ }
+
+ srcPaths := c.expandSeSources(ctx)
+ out := android.PathForModuleGen(ctx, c.Name())
+ ctx.Build(pctx, android.BuildParams{
+ Rule: android.Cat,
+ Inputs: srcPaths,
+ Output: out,
+ Description: "Combining compat cil for " + c.Name(),
+ })
+
+ c.installPath = android.PathForModuleInstall(ctx, "etc", "selinux", "mapping")
+ c.installSource = out
+ ctx.InstallFile(c.installPath, c.stem(), c.installSource)
+}
+
+func (c *compatCil) AndroidMkEntries() []android.AndroidMkEntries {
+ return []android.AndroidMkEntries{android.AndroidMkEntries{
+ Class: "ETC",
+ OutputFile: android.OptionalPathForPath(c.installSource),
+ ExtraEntries: []android.AndroidMkExtraEntriesFunc{
+ func(ctx android.AndroidMkExtraEntriesContext, entries *android.AndroidMkEntries) {
+ entries.SetPath("LOCAL_MODULE_PATH", c.installPath.ToMakePath())
+ entries.SetString("LOCAL_INSTALLED_MODULE_STEM", c.stem())
+ },
+ },
+ }}
+}