func installGoVersion()

in pkg/golang/install.go [81:111]

• 28 lines of code
• 8 McCabe index (conditional complexity)

func installGoVersion(v, pth string) error {
	if s, err := os.Stat(pth); err != nil && !os.IsNotExist(err) {
		return err
	} else if err == nil {
		if s.IsDir() {
			glog.Infof("Found existing go %s at %s", v, pth)
			return nil
		}
		return fmt.Errorf("expected %s to be a directory", pth)
	}

	glog.Infof("Installing go %s to %s", v, pth)
	tmpPath, err := ioutil.TempDir(os.Getenv("GOPATH"), "go-tmp-")
	if err != nil {
		return err
	}
	defer os.RemoveAll(tmpPath)

	cmd := exec.Command("/bin/bash", "-c", fmt.Sprintf("curl -SLf https://storage.googleapis.com/golang/go%s.linux-amd64.tar.gz | tar -xz --strip 1 -C %s", v, tmpPath))
	cmd.Dir = tmpPath
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
		return fmt.Errorf("command %q failed: %v", strings.Join(cmd.Args, " "), err)
	}
	if err := os.Rename(tmpPath, pth); err != nil {
		return err
	}

	return nil
}