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// Copyright 2015 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 common
import (
"bytes"
"io"
"io/ioutil"
"os"
"path/filepath"
"sort"
"android/soong"
"github.com/google/blueprint"
)
func init() {
soong.RegisterSingletonType("androidmk", AndroidMkSingleton)
}
type AndroidMkDataProvider interface {
AndroidMk() AndroidMkData
}
type AndroidMkData struct {
Class string
OutputFile OptionalPath
Custom func(w io.Writer, name, prefix string)
Extra func(name, prefix string, outputFile Path, arch Arch) []string
}
func AndroidMkSingleton() blueprint.Singleton {
return &androidMkSingleton{}
}
type androidMkSingleton struct{}
func (c *androidMkSingleton) GenerateBuildActions(ctx blueprint.SingletonContext) {
if !ctx.Config().(Config).EmbeddedInMake() {
return
}
ctx.SetNinjaBuildDir(pctx, filepath.Join(ctx.Config().(Config).buildDir, ".."))
var androidMkModulesList []AndroidModule
ctx.VisitAllModules(func(module blueprint.Module) {
if amod, ok := module.(AndroidModule); ok {
androidMkModulesList = append(androidMkModulesList, amod)
}
})
sort.Sort(AndroidModulesByName{androidMkModulesList, ctx})
transMk := PathForOutput(ctx, "Android.mk")
if ctx.Failed() {
return
}
err := translateAndroidMk(ctx, transMk.String(), androidMkModulesList)
if err != nil {
ctx.Errorf(err.Error())
}
ctx.Build(pctx, blueprint.BuildParams{
Rule: blueprint.Phony,
Outputs: []string{transMk.String()},
Optional: true,
})
}
func translateAndroidMk(ctx blueprint.SingletonContext, mkFile string, mods []AndroidModule) error {
buf := &bytes.Buffer{}
io.WriteString(buf, "LOCAL_PATH := $(TOP)\n")
io.WriteString(buf, "LOCAL_MODULE_MAKEFILE := $(lastword $(MAKEFILE_LIST))\n")
for _, mod := range mods {
err := translateAndroidMkModule(ctx, buf, mod)
if err != nil {
os.Remove(mkFile)
return err
}
}
// Don't write to the file if it hasn't changed
if _, err := os.Stat(mkFile); !os.IsNotExist(err) {
if data, err := ioutil.ReadFile(mkFile); err == nil {
matches := buf.Len() == len(data)
if matches {
for i, value := range buf.Bytes() {
if value != data[i] {
matches = false
break
}
}
}
if matches {
return nil
}
}
}
return ioutil.WriteFile(mkFile, buf.Bytes(), 0666)
}
func translateAndroidMkModule(ctx blueprint.SingletonContext, w io.Writer, mod blueprint.Module) error {
if mod != ctx.PrimaryModule(mod) {
// These will be handled by the primary module
return nil
}
name := ctx.ModuleName(mod)
type hostClass struct {
host bool
class string
multilib string
}
type archSrc struct {
arch Arch
src Path
extra []string
}
srcs := make(map[hostClass][]archSrc)
var modules []hostClass
ctx.VisitAllModuleVariants(mod, func(m blueprint.Module) {
provider, ok := m.(AndroidMkDataProvider)
if !ok {
return
}
amod := m.(AndroidModule).base()
data := provider.AndroidMk()
if !amod.Enabled() {
return
}
arch := amod.commonProperties.CompileArch
prefix := ""
if amod.HostOrDevice() == Host {
if arch.ArchType != ctx.Config().(Config).HostArches[amod.HostType()][0].ArchType {
prefix = "2ND_"
}
} else {
if arch.ArchType != ctx.Config().(Config).DeviceArches[0].ArchType {
prefix = "2ND_"
}
}
if data.Custom != nil {
data.Custom(w, name, prefix)
return
}
if !data.OutputFile.Valid() {
return
}
hC := hostClass{
host: amod.HostOrDevice() == Host,
class: data.Class,
multilib: amod.commonProperties.Compile_multilib,
}
src := archSrc{
arch: arch,
src: data.OutputFile.Path(),
}
if data.Extra != nil {
src.extra = data.Extra(name, prefix, src.src, arch)
}
if srcs[hC] == nil {
modules = append(modules, hC)
}
srcs[hC] = append(srcs[hC], src)
})
for _, hC := range modules {
archSrcs := srcs[hC]
io.WriteString(w, "\ninclude $(CLEAR_VARS)\n")
io.WriteString(w, "LOCAL_MODULE := "+name+"\n")
io.WriteString(w, "LOCAL_MODULE_CLASS := "+hC.class+"\n")
io.WriteString(w, "LOCAL_MULTILIB := "+hC.multilib+"\n")
printed := make(map[string]bool)
for _, src := range archSrcs {
io.WriteString(w, "LOCAL_SRC_FILES_"+src.arch.ArchType.String()+" := "+src.src.String()+"\n")
for _, extra := range src.extra {
if !printed[extra] {
printed[extra] = true
io.WriteString(w, extra+"\n")
}
}
}
if hC.host {
// TODO: this isn't true for every module
io.WriteString(w, "LOCAL_ACP_UNAVAILABLE := true\n")
io.WriteString(w, "LOCAL_IS_HOST_MODULE := true\n")
}
io.WriteString(w, "include $(BUILD_PREBUILT)\n")
}
return nil
}
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