prompt

Documentation

Overview

Package prompt provides facilities for classifying prompts, displaying prompts, and coordinating prompters.

Index

• Constants
• func Message(identifier, message string) error
• func Prompt(identifier, prompt string) (string, error)
• func PromptCommandLine(prompt string) (string, error)
• func PromptCommandLineWithResponseMode(prompt string, mode ResponseMode) (string, error)
• func RegisterPrompter(prompter Prompter) (string, error)
• func UnregisterPrompter(identifier string)
• type Prompter
• type ResponseMode

Constants

const (
	// PrompterEnvironmentVariable is the environment variable in which the
	// Mutagen prompter identifier is stored.
	PrompterEnvironmentVariable = "MUTAGEN_PROMPTER"
)

Functions

func Message

func Message(identifier, message string) error

Message invokes the Message method on a prompter in the global registry. If the prompter identifier provided is an empty string, this method is a no-op and returns a nil error.

func Prompt

func Prompt(identifier, prompt string) (string, error)

Prompt invokes the Prompt method on a prompter in the global registry.

func PromptCommandLine

func PromptCommandLine(prompt string) (string, error)

PromptCommandLine performs command line prompting using an automatically determined response mode.

func PromptCommandLineWithResponseMode

func PromptCommandLineWithResponseMode(prompt string, mode ResponseMode) (string, error)

PromptCommandLineWithResponseMode performs command line prompting using the specified response mode.

func RegisterPrompter

func RegisterPrompter(prompter Prompter) (string, error)

RegisterPrompter registers a prompter with the global registry. It generates a unique identifier for the prompter that can be used when requesting prompting.

func UnregisterPrompter

func UnregisterPrompter(identifier string)

UnregisterPrompter unregisters a prompter from the global registry. If the prompter is not registered, this method panics. If a prompter is unregistered with prompts pending for it, they will be cancelled.

Types

type Prompter

type Prompter interface {
	// Message should print a message to the user, returning an error if this is
	// not possible.
	Message(string) error
	// Prompt should print a prompt to the user, returning the user's response
	// or an error if this is not possible.
	Prompt(string) (string, error)
}

Prompter is the interface to which types supporting prompting must adhere.

type ResponseMode

type ResponseMode uint8

ResponseMode encodes how a prompt response should be displayed and validated.

const (
	// ResponseModeSecret indicates that a prompt response shouldn't be echoed.
	ResponseModeSecret ResponseMode = iota
	// ResponseModeMasked indicates that a prompt response should be masked.
	ResponseModeMasked
	// ResponseModeEcho indicates that a prompt response should be echoed.
	ResponseModeEcho
	// ResponseModeBinary indicates that a prompt response should be echoed and
	// additionally restricted to yes/no answers (potentially with an
	// alternative input control in the case of GUI input).
	ResponseModeBinary
)