go-expect

Usage

os.Exec example

package main

import (
	"log"
	"os"
	"os/exec"
	"time"

	expect "github.com/Netflix/go-expect"
)

func main() {
	c, err := expect.NewConsole(expect.WithStdout(os.Stdout))
	if err != nil {
		log.Fatal(err)
	}
	defer c.Close()

	cmd := exec.Command("vi")
	cmd.Stdin = c.Tty()
	cmd.Stdout = c.Tty()
	cmd.Stderr = c.Tty()

	go func() {
		c.ExpectEOF()
	}()

	err = cmd.Start()
	if err != nil {
		log.Fatal(err)
	}

	time.Sleep(time.Second)
	c.Send("iHello world\x1b")
	time.Sleep(time.Second)
	c.Send("dd")
	time.Sleep(time.Second)
	c.SendLine(":q!")

	err = cmd.Wait()
	if err != nil {
		log.Fatal(err)
	}
}

golang.org/x/crypto/ssh/terminal example

package main

import (
	"fmt"

	"golang.org/x/crypto/ssh/terminal"

	expect "github.com/Netflix/go-expect"
)

func getPassword(fd int) string {
	bytePassword, _ := terminal.ReadPassword(fd)

	return string(bytePassword)
}

func main() {
	c, _ := expect.NewConsole()

	defer c.Close()

	donec := make(chan struct{})
	go func() {
		defer close(donec)
		c.SendLine("hunter2")
	}()

	echoText := getPassword(int(c.Tty().Fd()))

	<-donec

	fmt.Printf("\nPassword from stdin: %s", echoText)
}