envconst

func Bool(varname string, def bool) (d bool)

func Duration(varname string, def time.Duration) (d time.Duration)

func Int(varname string, def int) (d int)

func Int64(varname string, def int64) (d int64)

func Reset()

func String(varname string, def string) (d string)

func Uint64(varname string, def uint64) (d uint64)

func Var(varname string, def flag.Value) (d interface{})