type Chowner func(*User) (*User, error)

type CopyInfo struct {
	Chown          Chowner
	Utime          *time.Time
	AllowWildcards bool
	Mode           *int
	// ModeStr is mode in non-octal format. Overrides Mode if non-empty.
	ModeStr           string
	XAttrErrorHandler XAttrErrorHandler
	CopyDirContents   bool
	FollowLinks       bool
	// Include only files/dirs matching at least one of these patterns
	IncludePatterns []string
	// Exclude files/dir matching any of these patterns (even if they match an include pattern)
	ExcludePatterns []string
	// If true, any source path that overwrite existing destination paths will always replace
	// the existing destination path, even if they are of different types (e.g. a directory will
	// replace any existing symlink or file)
	AlwaysReplaceExistingDestPaths bool
	ChangeFunc                     fsutil.ChangeFunc
}

type Opt func(*CopyInfo)

type User struct {
	UID, GID int
	SID      string
}

type XAttrErrorHandler func(dst, src, xattrKey string, err error) error