in tools/dockerversioning/versions/versions.go [111:120]
func (c Config) BoolOption(name string, defaultVal bool, helper string) *bool {
if configVal, ok := c[name]; ok {
b, err := strconv.ParseBool(configVal)
if err != nil {
log.Fatalf("error: %v", err)
}
defaultVal = b
}
return flag.Bool(name, defaultVal, helper)
}