util

Documentation

Overview

Package util provides utility functions for the cmd packages.

Index

• Variables
• func DefaultLocalIP4() (net.IP, error)
• func Env(key string, defaultValue string) string
• func GetEnv(key string) (string, bool)
• func IsEnvironmentArgument(s string) bool
• func PromptForPasswordString(r io.Reader, format string, a ...interface{}) string
• func PromptForString(r io.Reader, format string, a ...interface{}) string
• func WaitForSuccessfulDial(network, address string, timeout, interval time.Duration, retries int) error
• type Environment
  • func ParseEnvironmentArguments(s []string) (Environment, []string, []error)
• type Mux

Variables

var ErrorNoDefaultIP = errors.New("no suitable IP address")

NoDefaultIP means no suitable non-loopback address can be found.

Functions

func DefaultLocalIP4

func DefaultLocalIP4() (net.IP, error)

DefaultLocalIP4 returns an IPv4 address that this host can be reached on. Will return NoDefaultIP if no suitable address can be found.

func Env

func Env(key string, defaultValue string) string

Env returns an environment variable or a default value if not specified.

func GetEnv

func GetEnv(key string) (string, bool)

GetEnv returns an environment value if specified

func IsEnvironmentArgument

func IsEnvironmentArgument(s string) bool

func PromptForPasswordString

func PromptForPasswordString(r io.Reader, format string, a ...interface{}) string

TODO not tested on other platforms

func PromptForString

func PromptForString(r io.Reader, format string, a ...interface{}) string

func WaitForSuccessfulDial

func WaitForSuccessfulDial(network, address string, timeout, interval time.Duration, retries int) error

WaitForDial attempts to connect to the given address, closing and returning nil on the first successful connection.

Types

type Environment

type Environment map[string]string

func ParseEnvironmentArguments

func ParseEnvironmentArguments(s []string) (Environment, []string, []error)

type Mux

type Mux interface {
	Handle(pattern string, handler http.Handler)
	HandleFunc(pattern string, handler func(http.ResponseWriter, *http.Request))
}

Mux is a standard mux interface for HTTP