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// Copyright 2023 Google Inc. All rights reserved.
//
// 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 etc
import (
"android/soong/android"
"path/filepath"
"strings"
)
func init() {
RegisterInstallSymlinkBuildComponents(android.InitRegistrationContext)
}
func RegisterInstallSymlinkBuildComponents(ctx android.RegistrationContext) {
ctx.RegisterModuleType("install_symlink", InstallSymlinkFactory)
}
// install_symlink can be used to install an symlink with an arbitrary target to an arbitrary path
// on the device.
func InstallSymlinkFactory() android.Module {
module := &InstallSymlink{}
module.AddProperties(&module.properties)
android.InitAndroidMultiTargetsArchModule(module, android.DeviceSupported, android.MultilibCommon)
return module
}
type InstallSymlinkProperties struct {
// Where to install this symlink, relative to the partition it's installed on.
// Which partition it's installed on can be controlled by the vendor, system_ext, ramdisk, etc.
// properties.
Installed_location string
// The target of the symlink, aka where the symlink points.
Symlink_target string
}
type InstallSymlink struct {
android.ModuleBase
properties InstallSymlinkProperties
output android.Path
installedPath android.InstallPath
}
func (m *InstallSymlink) GenerateAndroidBuildActions(ctx android.ModuleContext) {
if filepath.Clean(m.properties.Symlink_target) != m.properties.Symlink_target {
ctx.PropertyErrorf("symlink_target", "Should be a clean filepath")
return
}
if filepath.Clean(m.properties.Installed_location) != m.properties.Installed_location {
ctx.PropertyErrorf("installed_location", "Should be a clean filepath")
return
}
if strings.HasPrefix(m.properties.Installed_location, "../") || strings.HasPrefix(m.properties.Installed_location, "/") {
ctx.PropertyErrorf("installed_location", "Should not start with / or ../")
return
}
out := android.PathForModuleOut(ctx, "out.txt")
android.WriteFileRuleVerbatim(ctx, out, "")
m.output = out
name := filepath.Base(m.properties.Installed_location)
installDir := android.PathForModuleInstall(ctx, filepath.Dir(m.properties.Installed_location))
m.installedPath = ctx.InstallAbsoluteSymlink(installDir, name, m.properties.Symlink_target)
}
func (m *InstallSymlink) AndroidMkEntries() []android.AndroidMkEntries {
return []android.AndroidMkEntries{{
Class: "FAKE",
// Need at least one output file in order for this to take effect.
OutputFile: android.OptionalPathForPath(m.output),
Include: "$(BUILD_PHONY_PACKAGE)",
ExtraEntries: []android.AndroidMkExtraEntriesFunc{
func(ctx android.AndroidMkExtraEntriesContext, entries *android.AndroidMkEntries) {
entries.AddStrings("LOCAL_SOONG_INSTALL_SYMLINKS", m.installedPath.String())
},
},
}}
}
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