12a719c0fc
android_filesystem modules can be included in APEX via the new `filesystems` property. The filesystem images are placed at ./etc/fs/<modulename>.img. Bug: 172413888 Test: m nothing Change-Id: I215ca7a32ff1988a0de4e1f71397684e189839ea
127 lines
4.3 KiB
Go
127 lines
4.3 KiB
Go
// Copyright (C) 2020 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package filesystem
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import (
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"fmt"
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"android/soong/android"
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"github.com/google/blueprint"
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)
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func init() {
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android.RegisterModuleType("android_filesystem", filesystemFactory)
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}
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type filesystem struct {
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android.ModuleBase
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android.PackagingBase
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output android.OutputPath
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installDir android.InstallPath
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}
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// android_filesystem packages a set of modules and their transitive dependencies into a filesystem
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// image. The filesystem images are expected to be mounted in the target device, which means the
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// modules in the filesystem image are built for the target device (i.e. Android, not Linux host).
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// The modules are placed in the filesystem image just like they are installed to the ordinary
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// partitions like system.img. For example, cc_library modules are placed under ./lib[64] directory.
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func filesystemFactory() android.Module {
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module := &filesystem{}
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android.InitPackageModule(module)
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android.InitAndroidMultiTargetsArchModule(module, android.DeviceSupported, android.MultilibCommon)
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return module
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}
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var dependencyTag = struct {
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blueprint.BaseDependencyTag
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android.InstallAlwaysNeededDependencyTag
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}{}
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func (f *filesystem) DepsMutator(ctx android.BottomUpMutatorContext) {
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f.AddDeps(ctx, dependencyTag)
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}
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func (f *filesystem) installFileName() string {
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return f.BaseModuleName() + ".img"
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}
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var pctx = android.NewPackageContext("android/soong/filesystem")
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func (f *filesystem) GenerateAndroidBuildActions(ctx android.ModuleContext) {
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zipFile := android.PathForModuleOut(ctx, "temp.zip").OutputPath
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f.CopyDepsToZip(ctx, zipFile)
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rootDir := android.PathForModuleOut(ctx, "root").OutputPath
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builder := android.NewRuleBuilder(pctx, ctx)
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builder.Command().
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BuiltTool("zipsync").
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FlagWithArg("-d ", rootDir.String()). // zipsync wipes this. No need to clear.
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Input(zipFile)
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mkuserimg := ctx.Config().HostToolPath(ctx, "mkuserimg_mke2fs")
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propFile := android.PathForModuleOut(ctx, "prop").OutputPath
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// TODO(jiyong): support more filesystem types other than ext4
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propsText := fmt.Sprintf(`mount_point=system\n`+
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`fs_type=ext4\n`+
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`use_dynamic_partition_size=true\n`+
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`ext_mkuserimg=%s\n`, mkuserimg.String())
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builder.Command().Text("echo").Flag("-e").Flag(`"` + propsText + `"`).
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Text(">").Output(propFile).
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Implicit(mkuserimg)
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f.output = android.PathForModuleOut(ctx, f.installFileName()).OutputPath
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builder.Command().BuiltTool("build_image").
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Text(rootDir.String()). // input directory
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Input(propFile).
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Output(f.output).
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Text(rootDir.String()) // directory where to find fs_config_files|dirs
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// rootDir is not deleted. Might be useful for quick inspection.
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builder.Build("build_filesystem_image", fmt.Sprintf("Creating filesystem %s", f.BaseModuleName()))
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f.installDir = android.PathForModuleInstall(ctx, "etc")
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ctx.InstallFile(f.installDir, f.installFileName(), f.output)
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}
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var _ android.AndroidMkEntriesProvider = (*filesystem)(nil)
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// Implements android.AndroidMkEntriesProvider
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func (f *filesystem) AndroidMkEntries() []android.AndroidMkEntries {
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return []android.AndroidMkEntries{android.AndroidMkEntries{
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Class: "ETC",
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OutputFile: android.OptionalPathForPath(f.output),
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ExtraEntries: []android.AndroidMkExtraEntriesFunc{
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func(entries *android.AndroidMkEntries) {
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entries.SetString("LOCAL_MODULE_PATH", f.installDir.ToMakePath().String())
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entries.SetString("LOCAL_INSTALLED_MODULE_STEM", f.installFileName())
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},
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},
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}}
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}
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// Filesystem is the public interface for the filesystem struct. Currently, it's only for the apex
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// package to have access to the output file.
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type Filesystem interface {
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android.Module
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OutputPath() android.Path
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}
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var _ Filesystem = (*filesystem)(nil)
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func (f *filesystem) OutputPath() android.Path {
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return f.output
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}
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