add

type Args struct {
	Alias    *string
	Coauthor *string
}

type AssignmentAborted struct {
	Alias             string
	ExistingCoauthor  string
	ReplacingCoauthor string
}

type AssignmentFailed struct {
	Reason error
}

type AssignmentSucceeded struct {
	Alias    string
	Coauthor string
}

type Definition struct {
	CommandName string
	Args        Args
	Deps        Dependencies
}

type Dependencies struct {
	SanityCheckCoauthor func(string) error
	GitAddAlias         func(string, string) error
	GitResolveAlias     func(string) (string, error)
	StdinNewReader      func() *bufio.Reader
	StdinReadLine       func(reader *bufio.Reader) (string, error)
}