prysm-pulse/shared/cmd/helpers.go

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package cmd
import (
"bufio"
"fmt"
"os"
"strings"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
var log = logrus.WithField("prefix", "node")
// ConfirmAction uses the passed in actionText as the confirmation text displayed in the terminal.
// The user must enter Y or N to indicate whether they confirm the action detailed in the warning text.
// Returns a boolean representing the user's answer.
func ConfirmAction(actionText string, deniedText string) (bool, error) {
var confirmed bool
reader := bufio.NewReader(os.Stdin)
log.Warn(actionText)
for {
fmt.Print(">> ")
line, _, err := reader.ReadLine()
if err != nil {
return false, err
}
trimmedLine := strings.TrimSpace(string(line))
lineInput := strings.ToUpper(trimmedLine)
if lineInput != "Y" && lineInput != "N" {
log.Errorf("Invalid option of %s chosen, please only enter Y/N", line)
continue
}
if lineInput == "Y" {
confirmed = true
break
}
log.Warn(deniedText)
break
}
return confirmed, nil
}
// EnterPassword queries the user for their password through the terminal, in order to make sure it is
// not passed in a visible way to the terminal.
func EnterPassword(confirmPassword bool, pr PasswordReader) (string, error) {
var passphrase string
log.Info("Enter a password:")
bytePassword, err := pr.ReadPassword()
if err != nil {
return "", errors.Wrap(err, "could not read account password")
}
text := string(bytePassword)
passphrase = strings.Replace(text, "\n", "", -1)
if confirmPassword {
log.Info("Please re-enter your password:")
bytePassword, err := pr.ReadPassword()
if err != nil {
return "", errors.Wrap(err, "could not read account password")
}
text := string(bytePassword)
confirmedPass := strings.Replace(text, "\n", "", -1)
if passphrase != confirmedPass {
log.Info("Passwords did not match, please try again")
return EnterPassword(true, pr)
}
}
return passphrase, nil
}