Add workaround for no password echo

This commit restores the terminal state in case the program is
interrupted while being in password read mode. This ensures the terminal
remains usable, also if the password input is being cancelled.

Signed-off-by: Felix Niederwanger <[email protected]>

Author: grisu48

pkg/auth/auth.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"net/url"
 	"os"
+	"os/signal"
 	"path/filepath"
 	"strings"
 
@@ -244,7 +245,26 @@ func getUserAndPass(opts *LoginOptions, password, userFromAuthFile string) (user
 	}
 	if password == "" {
 		fmt.Fprint(opts.Stdout, "Password: ")
-		pass, err := terminal.ReadPassword(int(os.Stdin.Fd()))
+		// Store and restore the terminal status on interruptions to
+		// avoid that the terminal remains in the password state
+		// This is necessary as a workaround for https://github.com/golang/go/issues/31180
+		stdin := int(os.Stdin.Fd())
+		oldState, err := terminal.GetState(stdin)
+		if err != nil {
+			oldState = nil
+		}
+		sigch := make(chan os.Signal, 1)
+		signal.Notify(sigch, os.Interrupt)
+		go func() {
+			for _ = range sigch {
+				if oldState != nil {
+					terminal.Restore(stdin, oldState)
+				}
+				os.Exit(1)
+			}
+		}()
+		pass, err := terminal.ReadPassword(stdin)
+		signal.Reset(os.Interrupt)
 		if err != nil {
 			return "", "", fmt.Errorf("reading password: %w", err)
 		}