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// 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"
"github.com/google/blueprint/proptools"
)
type SystemOtherImageProperties struct {
// The system_other image always requires a reference to the system image. The system_other
// partition gets built into the system partition's "b" slot in a/b partition builds. Thus, it
// copies most of its configuration from the system image, such as filesystem type, avb signing
// info, etc. Including it here does not automatically mean that it will pick up the system
// image's dexpropt files, it must also be listed in Preinstall_dexpreopt_files_from for that.
System_image *string
// This system_other partition will include all the dexpreopt files from the apps on these
// partitions.
Preinstall_dexpreopt_files_from []string
}
type systemOtherImage struct {
android.ModuleBase
android.DefaultableModuleBase
properties SystemOtherImageProperties
}
// The system_other image is the default contents of the "b" slot of the system image.
// It contains the dexpreopt files of all the apps on the device, for a faster first boot.
// Afterwards, at runtime, it will be used as a regular b slot for OTA updates, and the initial
// dexpreopt files will be deleted.
func SystemOtherImageFactory() android.Module {
module := &systemOtherImage{}
module.AddProperties(&module.properties)
android.InitAndroidMultiTargetsArchModule(module, android.DeviceSupported, android.MultilibCommon)
android.InitDefaultableModule(module)
return module
}
type systemImageDeptag struct {
blueprint.BaseDependencyTag
}
var systemImageDependencyTag = systemImageDeptag{}
type dexpreoptDeptag struct {
blueprint.BaseDependencyTag
}
var dexpreoptDependencyTag = dexpreoptDeptag{}
func (m *systemOtherImage) DepsMutator(ctx android.BottomUpMutatorContext) {
if proptools.String(m.properties.System_image) == "" {
ctx.ModuleErrorf("system_image property must be set")
return
}
ctx.AddDependency(ctx.Module(), systemImageDependencyTag, *m.properties.System_image)
ctx.AddDependency(ctx.Module(), dexpreoptDependencyTag, m.properties.Preinstall_dexpreopt_files_from...)
}
func (m *systemOtherImage) GenerateAndroidBuildActions(ctx android.ModuleContext) {
systemImage := ctx.GetDirectDepProxyWithTag(*m.properties.System_image, systemImageDependencyTag)
systemInfo, ok := android.OtherModuleProvider(ctx, systemImage, FilesystemProvider)
if !ok {
ctx.PropertyErrorf("system_image", "Expected system_image module to provide FilesystemProvider")
return
}
output := android.PathForModuleOut(ctx, "system_other.img")
stagingDir := android.PathForModuleOut(ctx, "staging_dir")
builder := android.NewRuleBuilder(pctx, ctx)
builder.Command().Textf("rm -rf %s && mkdir -p %s", stagingDir, stagingDir)
for _, otherPartition := range m.properties.Preinstall_dexpreopt_files_from {
dexModule := ctx.GetDirectDepProxyWithTag(otherPartition, dexpreoptDependencyTag)
_, ok := android.OtherModuleProvider(ctx, dexModule, FilesystemProvider)
if !ok {
ctx.PropertyErrorf("preinstall_dexpreopt_files_from", "Expected module %q to provide FilesystemProvider", otherPartition)
return
}
// TODO(b/390269431): Install dex files to the staging dir
}
// Most of the time, if build_image were to call a host tool, it accepts the path to the
// host tool in a field in the prop file. However, it doesn't have that option for fec, which
// it expects to just be on the PATH. Add fec to the PATH.
fec := ctx.Config().HostToolPath(ctx, "fec")
pathToolDirs := []string{filepath.Dir(fec.String())}
builder.Command().
Textf("PATH=%s:$PATH", strings.Join(pathToolDirs, ":")).
BuiltTool("build_image").
Text(stagingDir.String()). // input directory
Input(systemInfo.BuildImagePropFile).
Implicits(systemInfo.BuildImagePropFileDeps).
Implicit(fec).
Output(output).
Text(stagingDir.String())
builder.Build("build_system_other", "build system other")
ctx.SetOutputFiles(android.Paths{output}, "")
ctx.CheckbuildFile(output)
}
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