rotate

type Config struct {
	// Bytes sets soft limit for file size.
	// Soft limit may be exceeded to write a message to a single file.
	// If Bytes == 0, no rotation happens.
	Bytes int64
	// Count defines the maximum amount of files (open + rotated).
	// If Count <= 1, a file will be removed & created on Bytes size.
	Count int64
	// Lock defines whether to lock on write.
	// Must be set for asynchronous writes.
	Lock bool
}

type Error struct {
	Filename string
	Err      error
}

type File interface {
	io.Writer
	io.Closer

	Fd() uintptr
	Name() string
	Stat() (os.FileInfo, error)
	Sync() error
	WriteString(string) (int, error)
}

type Rotator interface {
	Rotate() (File, error)
}