Parse empty string as an empty slice of numbers

[tetafro]

I've added code to parse empty string as an empty slice of numbers.

Currently the following code gives an error if SLICE variable is empty, which is quite unexpected, I think.

type conf struct {
	Slice []int
}

func main() {
	var c conf
	envconfig.MustProcess("", &c)
	fmt.Println(c.Slice)
}

panic: envconfig.Process: assigning SLICE to Slice: converting '' to type []int. details: strconv.ParseInt: parsing "": invalid syntax

[eloff]

Good lord this has been open since the end of May. Please merge this.

[eloff]

You can workaround this problem by looking for fields set to []string{""}, and setting them to nil after calling envconfig.Process:

if len(Conf.CORSOrigins) == 1 && Conf.CORSOrigins[0] == "" {
	conf.CORSOrigins = nil
}

[teepark]

thanks for the fix, @tetafro