prompt

Documentation

Overview

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

Index

• func Message(identifier, message string) error
• func Prompt(identifier, prompt string) (string, error)
• func PromptCommandLine(prompt string) (string, error)
• func RegisterPrompter(prompter Prompter) (string, error)
• func UnregisterPrompter(identifier string)
• type PromptKind
  • func Classify(prompt string) PromptKind
• type 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 prompting on the command line.

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 PromptKind

type PromptKind uint8

PromptKind represents the type of a prompt and how it should be displayed.

const (
	// PromptKindSecret indicates a prompt for which responses should not be
	// echoed.
	PromptKindSecret PromptKind = iota
	// PromptKindEcho indicates a prompt for which responses should be echoed.
	PromptKindEcho
	// PromptKindBinary indicates a prompt for which responses should be echoed,
	// and additionally should be restricted to yes/no answers (potentially with
	// an alternative input control in the case of GUI input).
	PromptKindBinary
)

func Classify

func Classify(prompt string) PromptKind

Classify classifies a prompt based on its text.

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.