in lib/notifiers/notifiers.go [498:506]
func GetEnv(name string) (string, bool) {
val := os.Getenv(name)
if val == "" {
log.V(2).Infof("env var %q is empty", name)
} else {
log.V(2).Infof("env var %q is %q", name, val)
}
return val, val != ""
}