Function install

cli/install.go:40–177

(ctx *cli.Context)

)

func install(ctx *cli.Context) (err error) {
	vname := ctx.Args().First()
	if vname == "" {
		return cli.ShowSubcommandHelp(ctx)
	}

	// Find matching Go version.
	c, err := collector.NewCollector(strings.Split(os.Getenv(mirrorEnv), mirrorSep)...)
	if err != nil {
		return cli.Exit(errstring(err), 1)
	}
	items, err := c.AllVersions()
	if err != nil {
		return cli.Exit(errstring(err), 1)
	}

	v, err := version.NewFinder(items,
		version.WithFinderPackageKind(version.ArchiveKind),
		version.WithFinderGoos(runtime.GOOS),
		version.WithFinderGoarch(runtime.GOARCH),
	).Find(vname)
	if err != nil {
		return cli.Exit(errstring(err), 1)
	}

	vname = v.Name()
	targetV := filepath.Join(versionsDir, vname)

	// Check if the version is already installed.
	var finfo os.FileInfo
	if finfo, err = os.Stat(targetV); err == nil && finfo.IsDir() {
		return cli.Exit(fmt.Sprintf("[g] %q version has been installed.", vname), 1)
	}

	// Find installation packages for current platform
	pkgs, err := v.FindPackages(version.ArchiveKind, runtime.GOOS, runtime.GOARCH)
	if err != nil {
		return cli.Exit(errstring(err), 1)
	}
	var pkg version.Package
	if len(pkgs) > 1 {
		menu := wmenu.NewMenu("Please select the package you want to install.")
		menu.AddColor(
			wlog.Color{Code: ct.Green},
			wlog.Color{Code: ct.Yellow},
			wlog.Color{Code: ct.Magenta},
			wlog.Color{Code: ct.Yellow},
		)
		menu.Action(func(opts []wmenu.Opt) error {
			pkg = opts[0].Value.(version.Package)
			return nil
		})
		for i := range pkgs {
			if i == 0 {
				menu.Option(pkgs[i].FileName, pkgs[i], true, nil)
			} else {
				menu.Option(" "+pkgs[i].FileName, pkgs[i], false, nil)
			}