wrappedreadline

Documentation

Overview

Shamelessly copied from the Terraform repo because it wasn't worth vendoring out two hundred lines of code so Packer could use it too.

wrappedreadline is a package that has helpers for interacting with readline from a panicwrap executable.

panicwrap overrides the standard file descriptors so that the child process no longer looks like a TTY. The helpers here access the extra file descriptors passed by panicwrap to fix that.

panicwrap should be checked for with panicwrap.Wrapped before using this librar, since this library won't adapt if the binary is not wrapped.

Index

• func IsTerminal() bool
• func Override(cfg *readline.Config) *readline.Config
• func Stderr() *os.File
• func Stdin() *os.File
• func Stdout() *os.File
• func TerminalWidth() int
• type RawMode
  • func (r *RawMode) Enter() (err error)
  • func (r *RawMode) Exit() error

Functions

func IsTerminal

func IsTerminal() bool

IsTerminal determines if this process is attached to a TTY.

func Override

func Override(cfg *readline.Config) *readline.Config

Override overrides the values in readline.Config that need to be set with wrapped values.

func Stderr

func Stderr() *os.File

Stderr returns the true stderr of the process.

func Stdin

func Stdin() *os.File

Package provides access to the standard OS streams (stdin, stdout, stderr) even if wrapped under panicwrap. Stdin returns the true stdin of the process.

func Stdout

func Stdout() *os.File

Stdout returns the true stdout of the process.

func TerminalWidth

func TerminalWidth() int

TerminalWidth gets the terminal width in characters.

Types

type RawMode

type RawMode struct {
	StdinFd int
	// contains filtered or unexported fields
}

RawMode is a helper for entering and exiting raw mode.

func (*RawMode) Enter

func (r *RawMode) Enter() (err error)

func (*RawMode) Exit

func (r *RawMode) Exit() error