cmd/gomobile: add build subcommand
Change-Id: I879e51834726c8713c5befeb4be2e328d5295af4 Reviewed-on: https://go-review.googlesource.com/4110 Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
This commit is contained in:
David Crawshaw
parent
c44ea393d0
commit
c55730db15
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@ -0,0 +1,261 @@
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"bytes"
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"crypto/x509"
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"encoding/pem"
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"errors"
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"flag"
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"fmt"
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"go/build"
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"io"
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"io/ioutil"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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"strings"
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)
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var ctx = build.Default
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var pkg *build.Package
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var cmdBuild = &command{
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run: runBuild,
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Name: "build",
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Usage: "[package]",
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Short: "compile android APK and/or iOS app",
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Long: `
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Build compiles and encodes the app named by the import path.
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The named package must define a main function.
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If an AndroidManifest.xml is defined in the package directory, it is
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added to the APK file. Otherwise, a default manifest is generated.
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If the package directory contains an assets subdirectory, its contents
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are copied into the APK file.
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These build flags are shared by the build, install, and test commands.
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For documentation, see 'go help build':
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TODO:
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-a
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-tags 'tag list'
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`,
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}
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// TODO: -n
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// TODO: -v
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// TODO: -x
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// TODO: -mobile
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func runBuild(cmd *command) error {
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cwd, err := os.Getwd()
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if err != nil {
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panic(err)
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}
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switch len(flag.Args()) {
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case 1:
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pkg, err = ctx.ImportDir(cwd, build.ImportComment)
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case 2:
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pkg, err = ctx.Import(flag.Args()[1], cwd, build.ImportComment)
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default:
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cmd.usage()
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os.Exit(1)
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}
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if err != nil {
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return err
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}
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// Check that we are compiling an app.
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if pkg.Name != "main" {
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return fmt.Errorf(`package %q: can only build package "main"`, pkg.Name)
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}
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importsApp := false
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for _, path := range pkg.Imports {
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if path == "golang.org/x/mobile/app" {
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importsApp = true
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break
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}
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}
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if !importsApp {
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return fmt.Errorf(`%s does not import "golang.org/x/mobile/app"`, pkg.ImportPath)
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}
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workPath, err := ioutil.TempDir("", "gobuildapk-work-")
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if err != nil {
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return err
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}
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defer os.RemoveAll(workPath)
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libName := path.Base(pkg.ImportPath)
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manifestData, err := ioutil.ReadFile(filepath.Join(pkg.Dir, "AndroidManifest.xml"))
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if err != nil {
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if !os.IsNotExist(err) {
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return err
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}
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buf := new(bytes.Buffer)
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err := manifestTmpl.Execute(buf, manifestTmplData{
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// TODO(crawshaw): a better package path.
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JavaPkgPath: "org.golang.todo." + pkg.Name,
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Name: strings.ToUpper(pkg.Name[:1]) + pkg.Name[1:],
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LibName: libName,
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})
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if err != nil {
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return err
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}
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// TODO(crawshaw): print generated manifest with -v.
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manifestData = buf.Bytes()
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} else {
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libName, err = manifestLibName(manifestData)
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if err != nil {
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return err
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}
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}
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libPath := filepath.Join(workPath, "lib"+libName+".so")
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gopath := goEnv("GOPATH")
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ccpath := filepath.Join(gopath, filepath.FromSlash("pkg/gomobile/android-"+ndkVersion+"/arm/bin"))
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if _, err := os.Stat(ccpath); err != nil {
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// TODO(crawshaw): call gomobile init
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return fmt.Errorf("android %s toolchain not installed in $GOPATH/pkg/gomobile, run gomobile init", ndkVersion)
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}
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gocmd := exec.Command(
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`go`,
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`build`,
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`-i`, // TODO(crawshaw): control with a flag
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`-ldflags="-shared"`,
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`-o`, libPath)
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gocmd.Stdout = os.Stdout
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gocmd.Stderr = os.Stderr
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gocmd.Env = []string{
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`GOOS=android`,
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`GOARCH=arm`,
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`GOARM=7`,
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`CGO_ENABLED=1`,
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`CC=` + filepath.Join(ccpath, "arm-linux-androideabi-gcc"),
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`CXX=` + filepath.Join(ccpath, "arm-linux-androideabi-g++"),
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`GOGCCFLAGS="-fPIC -marm -pthread -fmessage-length=0"`,
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`GOROOT=` + goEnv("GOROOT"),
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`GOPATH=` + gopath,
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}
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if err := gocmd.Run(); err != nil {
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return err
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}
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block, _ := pem.Decode([]byte(debugCert))
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if block == nil {
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return errors.New("no debug cert")
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}
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privKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
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if err != nil {
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return err
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}
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// TODO: -o
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out, err := os.Create(filepath.Base(pkg.Dir) + ".apk")
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if err != nil {
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return err
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}
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apkw := NewWriter(out, privKey)
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w, err := apkw.Create("AndroidManifest.xml")
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if err != nil {
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return err
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}
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if _, err := w.Write(manifestData); err != nil {
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return err
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}
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r, err := os.Open(libPath)
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if err != nil {
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return err
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}
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w, err = apkw.Create("lib/armeabi/lib" + libName + ".so")
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if err != nil {
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return err
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}
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if _, err := io.Copy(w, r); err != nil {
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return err
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}
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// Add any assets.
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assetsDir := filepath.Join(pkg.Dir, "assets")
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assetsDirExists := true
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fi, err := os.Stat(assetsDir)
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if err != nil {
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if os.IsNotExist(err) {
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assetsDirExists = false
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} else {
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return err
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}
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} else {
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assetsDirExists = fi.IsDir()
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}
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if assetsDirExists {
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filepath.Walk(assetsDir, func(path string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if info.IsDir() {
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return nil
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}
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name := "assets/" + path[len(assetsDir)+1:]
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w, err := apkw.Create(name)
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if err != nil {
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return err
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}
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f, err := os.Open(path)
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if err != nil {
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return err
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}
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defer f.Close()
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_, err = io.Copy(w, f)
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return err
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})
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}
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// TODO: add gdbserver to apk?
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return apkw.Close()
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}
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// A random uninteresting private key.
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// Must be consistent across builds so newer app versions can be installed.
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const debugCert = `
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-----BEGIN RSA PRIVATE KEY-----
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MIIEowIBAAKCAQEAy6ItnWZJ8DpX9R5FdWbS9Kr1U8Z7mKgqNByGU7No99JUnmyu
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NQ6Uy6Nj0Gz3o3c0BXESECblOC13WdzjsH1Pi7/L9QV8jXOXX8cvkG5SJAyj6hcO
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LOapjDiN89NXjXtyv206JWYvRtpexyVrmHJgRAw3fiFI+m4g4Qop1CxcIF/EgYh7
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rYrqh4wbCM1OGaCleQWaOCXxZGm+J5YNKQcWpjZRrDrb35IZmlT0bK46CXUKvCqK
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x7YXHgfhC8ZsXCtsScKJVHs7gEsNxz7A0XoibFw6DoxtjKzUCktnT0w3wxdY7OTj
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9AR8mobFlM9W3yirX8TtwekWhDNTYEu8dwwykwIDAQABAoIBAA2hjpIhvcNR9H9Z
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BmdEecydAQ0ZlT5zy1dvrWI++UDVmIp+Ve8BSd6T0mOqV61elmHi3sWsBN4M1Rdz
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3N38lW2SajG9q0fAvBpSOBHgAKmfGv3Ziz5gNmtHgeEXfZ3f7J95zVGhlHqWtY95
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JsmuplkHxFMyITN6WcMWrhQg4A3enKLhJLlaGLJf9PeBrvVxHR1/txrfENd2iJBH
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FmxVGILL09fIIktJvoScbzVOneeWXj5vJGzWVhB17DHBbANGvVPdD5f+k/s5aooh
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hWAy/yLKocr294C4J+gkO5h2zjjjSGcmVHfrhlXQoEPX+iW1TGoF8BMtl4Llc+jw
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lKWKfpECgYEA9C428Z6CvAn+KJ2yhbAtuRo41kkOVoiQPtlPeRYs91Pq4+NBlfKO
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2nWLkyavVrLx4YQeCeaEU2Xoieo9msfLZGTVxgRlztylOUR+zz2FzDBYGicuUD3s
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EqC0Wv7tiX6dumpWyOcVVLmR9aKlOUzA9xemzIsWUwL3PpyONhKSq7kCgYEA1X2F
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f2jKjoOVzglhtuX4/SP9GxS4gRf9rOQ1Q8DzZhyH2LZ6Dnb1uEQvGhiqJTU8CXxb
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7odI0fgyNXq425Nlxc1Tu0G38TtJhwrx7HWHuFcbI/QpRtDYLWil8Zr7Q3BT9rdh
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moo4m937hLMvqOG9pyIbyjOEPK2WBCtKW5yabqsCgYEAu9DkUBr1Qf+Jr+IEU9I8
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iRkDSMeusJ6gHMd32pJVCfRRQvIlG1oTyTMKpafmzBAd/rFpjYHynFdRcutqcShm
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aJUq3QG68U9EAvWNeIhA5tr0mUEz3WKTt4xGzYsyWES8u4tZr3QXMzD9dOuinJ1N
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+4EEumXtSPKKDG3M8Qh+KnkCgYBUEVSTYmF5EynXc2xOCGsuy5AsrNEmzJqxDUBI
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SN/P0uZPmTOhJIkIIZlmrlW5xye4GIde+1jajeC/nG7U0EsgRAV31J4pWQ5QJigz
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0+g419wxIUFryGuIHhBSfpP472+w1G+T2mAGSLh1fdYDq7jx6oWE7xpghn5vb9id
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EKLjdwKBgBtz9mzbzutIfAW0Y8F23T60nKvQ0gibE92rnUbjPnw8HjL3AZLU05N+
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cSL5bhq0N5XHK77sscxW9vXjG0LJMXmFZPp9F6aV6ejkMIXyJ/Yz/EqeaJFwilTq
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Mc6xR47qkdzu0dQ1aPm4XD7AWDtIvPo/GG2DKOucLBbQc2cOWtKS
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-----END RSA PRIVATE KEY-----
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`
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@ -87,7 +87,8 @@ func help(args []string) {
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}
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var commands = []*command{
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// TODO(crawshaw): cmdBuild, cmdInstall, cmdRun
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// TODO(crawshaw): cmdInstall, cmdRun
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cmdBuild,
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cmdInit,
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}
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@ -0,0 +1,78 @@
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"encoding/xml"
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"errors"
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"fmt"
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"html/template"
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)
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type manifestXML struct {
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Activity activityXML `xml:"application>activity"`
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}
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type activityXML struct {
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Name string `xml:"name,attr"`
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MetaData []metaDataXML `xml:"meta-data"`
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}
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type metaDataXML struct {
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Name string `xml:"name,attr"`
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Value string `xml:"value,attr"`
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}
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// manifestLibName parses the AndroidManifest.xml and finds the library
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// name of the NativeActivity.
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func manifestLibName(data []byte) (string, error) {
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manifest := new(manifestXML)
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if err := xml.Unmarshal(data, manifest); err != nil {
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return "", err
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}
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if manifest.Activity.Name != "android.app.NativeActivity" {
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return "", fmt.Errorf("can only build an .apk for NativeActivity, not %q", manifest.Activity.Name)
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}
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libName := ""
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for _, md := range manifest.Activity.MetaData {
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if md.Name == "android.app.lib_name" {
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libName = md.Value
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break
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}
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}
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if libName == "" {
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return "", errors.New("AndroidManifest.xml missing meta-data android.app.lib_name")
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}
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return libName, nil
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}
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type manifestTmplData struct {
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JavaPkgPath string
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Name string
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LibName string
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}
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var manifestTmpl = template.Must(template.New("manifest").Parse(`
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<?xml version="1.0" encoding="utf-8"?>
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<manifest
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xmlns:android="http://schemas.android.com/apk/res/android"
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package="{{.JavaPkgPath}}"
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android:versionCode="1"
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android:versionName="1.0">
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<uses-sdk android:minSdkVersion="9" />
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<application android:label="{{.Name}}" android:hasCode="false" android:debuggable="true">
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<activity android:name="android.app.NativeActivity"
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android:label="{{.Name}}"
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android:configChanges="orientation|keyboardHidden">
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<meta-data android:name="android.app.lib_name" android:value="{{.LibName}}" />
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>
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`))
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