bort prompts if SSH connection failed earlier (fixes #165)

Author: pstadler

lib/transport/ssh.js

@@ -25,6 +25,8 @@ function SSH(context) {
 
   var fiber = Fiber.current;
 
+  var hasFailed = false;
+
   this._connection = new Connection();
 
   this._connection.on('keyboard-interactive', function next(name, instructions,
@@ -33,7 +35,7 @@ function SSH(context) {
 
     var currentPrompt = prompts[answers.length];
 
-    if(answers.length < prompts.length) {
+    if(answers.length < prompts.length && !hasFailed) {
       new Fiber(function() {
         var answer = self.prompt(currentPrompt.prompt, { hidden: !currentPrompt.echo });
         answers.push(answer);
@@ -50,6 +52,7 @@ function SSH(context) {
   });
 
   this._connection.on('error', function(err) {
+    hasFailed = true;
     return fiber.throwInto(err);
   });