func buildBinary(ctx *cli.Context, args ...string) error {
	_, target, err := parseGopmfile(setting.GOPMFILE)
	if err != nil {
		return err
	}

	if err := linkVendors(ctx, ""); err != nil {
		return err
	}

	log.Info("Building...")

	cmdArgs := []string{"go", "build"}
	cmdArgs = append(cmdArgs, args...)
	if err := execCmd(setting.DefaultVendor, setting.WorkDir, cmdArgs...); err != nil {
		return fmt.Errorf("fail to build program: %v", err)
	}

	if setting.IsWindowsXP {
		fName := path.Base(target)
		binName := fName + ".exe"
		os.Remove(binName)
		exePath := path.Join(setting.DefaultVendorSrc, target, binName)
		if base.IsFile(exePath) {
			if err := os.Rename(exePath, path.Join(setting.WorkDir, binName)); err != nil {
				return fmt.Errorf("fail to move binary: %v", err)
			}
		} else {
			log.Warn("No binary generated")
		}
	}
	return nil
}

func runList(ctx *cli.Context) {
	if err := setup(ctx); err != nil {
		errors.SetError(err)
		return
	}

	if !setting.HasGOPATHSetting && !base.IsFile(setting.DefaultGopmfile) {
		log.Warn("Dependency list may contain package itself without GOPATH setting and gopmfile.")
	}
	gf, target, err := parseGopmfile(setting.DefaultGopmfile)
	if err != nil {
		errors.SetError(err)
		return
	}

	list, err := getDepList(ctx, target, setting.WorkDir, setting.DefaultVendor)
	if err != nil {
		errors.SetError(err)
		return
	}

	fmt.Printf("Dependency list (%d):\n", len(list))
	for _, name := range list {
		fmt.Printf("-> %s%s\n", name, verSuffix(gf, name))
	}
}

// LoadGopmfile loads and returns given gopmfile.
func LoadGopmfile(fileName string) (*goconfig.ConfigFile, error) {
	if !base.IsFile(fileName) {
		return goconfig.LoadFromData([]byte(""))
	}

	gf, err := goconfig.LoadConfigFile(fileName)
	if err != nil {
		return nil, fmt.Errorf("Fail to load gopmfile: %v", err)
	}
	return gf, nil
}

func LoadLocalNodes() (err error) {
	if !base.IsFile(LocalNodesFile) {
		os.MkdirAll(path.Dir(LocalNodesFile), os.ModePerm)
		os.Create(LocalNodesFile)
	}

	LocalNodes, err = goconfig.LoadConfigFile(LocalNodesFile)
	if err != nil {
		return fmt.Errorf("fail to load localnodes.list: %v", err)
	}
	return nil
}

// LoadPkgNameList loads package name pairs.
func LoadPkgNameList() error {
	if !base.IsFile(PkgNameListFile) {
		return nil
	}

	data, err := ioutil.ReadFile(PkgNameListFile)
	if err != nil {
		return fmt.Errorf("fail to load package name list: %v", err)
	}

	pkgs := strings.Split(string(data), "\n")
	for i, line := range pkgs {
		infos := strings.Split(line, "=")
		if len(infos) != 2 {
			// Last item might be empty line.
			if i == len(pkgs)-1 {
				continue
			}
			return fmt.Errorf("fail to parse package name: %v", line)
		}
		PackageNameList[strings.TrimSpace(infos[0])] = strings.TrimSpace(infos[1])
	}
	return nil
}

//.........这里部分代码省略.........
	}

	tmpVendor := path.Join("vendor", path.Base(n.RootPath))
	os.RemoveAll(tmpVendor)
	os.RemoveAll(setting.VENDOR)
	// TODO: should use .gopm/temp path.
	if err := autoLink(n.InstallPath, tmpVendor); err != nil {
		errors.SetError(fmt.Errorf("Fail to link slef: %v", err))
		return
	}
	os.Chdir(tmpVendor)
	oldWorkDir := setting.WorkDir
	setting.WorkDir = path.Join(setting.WorkDir, tmpVendor)
	if !setting.Debug {
		defer func() {
			os.Chdir(oldWorkDir)
			os.RemoveAll("vendor")
			os.RemoveAll(setting.VENDOR)
		}()
	}

	// if err := buildBinary(ctx); err != nil {
	// 	errors.SetError(err)
	// 	return
	// }

	if err := linkVendors(ctx, n.ImportPath); err != nil {
		errors.SetError(err)
		return
	}

	log.Info("Installing...")

	cmdArgs := []string{"go", "install"}
	if ctx.Bool("verbose") {
		cmdArgs = append(cmdArgs, "-v")
	}
	cmdArgs = append(cmdArgs, n.ImportPath)
	if err := execCmd(setting.DefaultVendor, setting.WorkDir, cmdArgs...); err != nil {
		errors.SetError(fmt.Errorf("fail to run program: %v", err))
		return
	}

	gf, _, err := parseGopmfile(setting.GOPMFILE)
	if err != nil {
		errors.SetError(err)
		return
	}

	// Because build command moved binary to root path.
	binName := path.Base(n.RootPath)
	binPath := path.Join(setting.DefaultVendor, "bin", path.Base(n.RootPath))
	if runtime.GOOS == "windows" {
		binName += ".exe"
	}

	// Move binary to given directory.
	movePath := oldWorkDir
	if ctx.IsSet("dir") {
		movePath = ctx.String("dir")
	} else if strings.HasPrefix(n.ImportPath, "code.google.com/p/go.tools/cmd/") {
		movePath = path.Join(runtime.GOROOT(), "pkg/tool", runtime.GOOS+"_"+runtime.GOARCH)
		log.Info("Command executed successfully!")
		fmt.Println("Binary has been built into: " + movePath)
		return
	}

	if !base.IsFile(binPath) {
		errors.SetError(fmt.Errorf("Previous steps weren't successful or the project does not contain main package"))
		return
	}

	if base.IsExist(path.Join(movePath, binName)) {
		if err := os.Remove(path.Join(movePath, binName)); err != nil {
			log.Warn("Cannot remove binary in work directory: %v", err)
		}
	}

	if err := os.Rename(binPath, movePath+"/"+binName); err != nil {
		errors.SetError(fmt.Errorf("Fail to move binary: %v", err))
		return
	}
	os.Chmod(movePath+"/"+binName, os.ModePerm)

	includes := strings.Split(gf.MustValue("res", "include"), "|")
	if len(includes) > 0 {
		log.Info("Copying resources to %s", movePath)
		for _, include := range includes {
			if base.IsDir(include) {
				os.RemoveAll(path.Join(movePath, include))
				if err := base.CopyDir(include, filepath.Join(movePath, include)); err != nil {
					errors.AppendError(errors.NewErrCopyResource(include))
				}
			}
		}
	}

	log.Info("Command executed successfully!")
	fmt.Println("Binary has been built into: " + movePath)
}

// downloadPackages downloads packages with certain commit,
// if the commit is empty string, then it downloads all dependencies,
// otherwise, it only downloada package with specific commit only.
func downloadPackages(target string, ctx *cli.Context, nodes []*doc.Node) (err error) {
	for _, n := range nodes {
		// Check if it is a valid remote path or C.
		if n.ImportPath == "C" {
			continue
		} else if !base.IsValidRemotePath(n.ImportPath) {
			// Invalid import path.
			if setting.LibraryMode {
				errors.AppendError(errors.NewErrInvalidPackage(n.VerString()))
			}
			log.Error("Skipped invalid package: " + n.VerString())
			failConut++
			continue
		}

		// Valid import path.
		if isSubpackage(n.RootPath, target) {
			continue
		}

		// Indicates whether need to download package or update.
		if n.IsFixed() && n.IsExist() {
			n.IsGetDepsOnly = true
		}

		if downloadCache.Get(n.VerString()) {
			if !skipCache.Get(n.VerString()) {
				skipCache.Set(n.VerString())
				log.Debug("Skipped downloaded package: %s", n.VerString())
			}
			continue
		}

		if !ctx.Bool("update") {
			// Check if package has been downloaded.
			if n.IsExist() {
				if !skipCache.Get(n.VerString()) {
					skipCache.Set(n.VerString())
					log.Info("%s", n.InstallPath)
					log.Debug("Skipped installed package: %s", n.VerString())
				}

				// Only copy when no version control.
				if !copyCache.Get(n.VerString()) && (ctx.Bool("gopath") || ctx.Bool("local")) {
					copyCache.Set(n.VerString())
					if err = n.CopyToGopath(); err != nil {
						return err
					}
				}
				continue
			} else {
				setting.LocalNodes.SetValue(n.RootPath, "value", "")
			}
		}
		// Download package.
		nod, imports, err := downloadPackage(ctx, n)
		if err != nil {
			return err
		}
		for _, name := range imports {
			var gf *goconfig.ConfigFile
			gfPath := path.Join(n.InstallPath, setting.GOPMFILE)

			// Check if has gopmfile.
			if base.IsFile(gfPath) {
				log.Info("Found gopmfile: %s", n.VerString())
				var err error
				gf, _, err = parseGopmfile(gfPath)
				if err != nil {
					return fmt.Errorf("fail to parse gopmfile(%s): %v", gfPath, err)
				}
			}

			// Need to download dependencies.
			// Generate temporary nodes.
			nodes := make([]*doc.Node, len(imports))
			for i := range nodes {
				nodes[i] = doc.NewNode(name, doc.BRANCH, "", !ctx.Bool("download"))

				if gf == nil {
					continue
				}

				// Check if user specified the version.
				if v := gf.MustValue("deps", imports[i]); len(v) > 0 {
					nodes[i].Type, nodes[i].Value, err = validPkgInfo(v)
					if err != nil {
						return err
					}
				}
			}
			if err = downloadPackages(target, ctx, nodes); err != nil {
				return err
			}
		}

		// Only save package information with specific commit.
//.........这里部分代码省略.........

func runGen(ctx *cli.Context) {
	if err := setup(ctx); err != nil {
		errors.SetError(err)
		return
	}

	gfPath := path.Join(setting.WorkDir, setting.GOPMFILE)
	if !setting.HasGOPATHSetting && !base.IsFile(gfPath) {
		log.Warn("Dependency list may contain package itself without GOPATH setting and gopmfile.")
	}
	gf, target, err := parseGopmfile(gfPath)
	if err != nil {
		errors.SetError(err)
		return
	}

	list, err := getDepList(ctx, target, setting.WorkDir, setting.DefaultVendor)
	if err != nil {
		errors.SetError(err)
		return
	}
	for _, name := range list {
		// Check if user has specified the version.
		if val := gf.MustValue("deps", name); len(val) == 0 {
			gf.SetValue("deps", name, "")
		}
	}

	// Check resources.
	if _, err = gf.GetValue("res", "include"); err != nil {
		resList := make([]string, 0, len(setting.CommonRes))
		for _, res := range setting.CommonRes {
			if base.IsExist(res) {
				resList = append(resList, res)
			}
		}
		gf.SetValue("res", "include", strings.Join(resList, "|"))
	}

	if err = setting.SaveGopmfile(gf, gfPath); err != nil {
		errors.SetError(err)
		return
	}

	if ctx.Bool("local") {
		localGopath := gf.MustValue("project", "local_gopath")
		if len(localGopath) == 0 {
			localGopath = "./vendor"
			gf.SetValue("project", "local_gopath", localGopath)
			if err = setting.SaveGopmfile(gf, gfPath); err != nil {
				errors.SetError(err)
				return
			}
		}

		for _, name := range []string{"src", "pkg", "bin"} {
			os.MkdirAll(path.Join(localGopath, name), os.ModePerm)
		}
	}

	log.Info("Generate gopmfile successfully!")
}