Write a configuration loader that reuses the existing format from the python sdk

[dietb]

While I'm a huge fan of environment variables, not everyone is. There should be a hook, initializer, or something else that'll load the variables from ~/.anki_vector/sdk_config.ini

For the unitiated, the file format is as followed

[00507778]
cert = location_of_bot_cert.cert
ip = bot_ip_address
name =bot_name
guid = guid_aka_token

[markoxley]

I haven't added it to the repo, as it is very rough and ready, and probably not for Windows, but I wrapped the vector.New method in this function to do just what you suggest:

func getVector() (*vector.Vector, error) {
	botToken := ""
	botTarget := ""

	home := os.Getenv("HOME")
	f, err := ioutil.ReadFile(home + "/.anki_vector/sdk_config.ini")
	if err != nil {
		return nil, err
	}

	var re = regexp.MustCompile(`(?m)^\s*([^\s=]+)\s*=\s*(\S+)$`)
	for _, m := range re.FindAllStringSubmatch(string(f), -1) {
		switch m[1] {
		case "ip":
			botTarget = m[2]
			if !strings.HasPrefix(botTarget, ":443") {
				botTarget += ":443"
			}
		case "guid":
			botToken = m[2]
		}
	}

	return vector.New(
		vector.WithTarget(botTarget),
		vector.WithToken(botToken),
	)
}