From ac2ec3457df6b699916864f26a89a1cc6fcadd9d Mon Sep 17 00:00:00 2001
From: Peter Eckersley <pde@eff.org>
Date: Tue, 5 Apr 2016 11:33:33 -0700
Subject: [PATCH] NcursesDisplay.menu: treat ESC as cancel

Currently it will fire a weird traceback like:

File "/home/ubuntu/letsencrypt/letsencrypt/plugins/selection.py", line 113, in choose_plugin
    code, index = disp.menu(question, opts, help_label="More Info")
File "/home/ubuntu/letsencrypt/letsencrypt/display/util.py", line 129, in menu
    return code, int(index) - 1
ValueError: invalid literal for int() with base 10: ''
---
 letsencrypt/display/util.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/letsencrypt/display/util.py b/letsencrypt/display/util.py
index 20c6be156..40dd00f8b 100644
--- a/letsencrypt/display/util.py
+++ b/letsencrypt/display/util.py
@@ -123,7 +123,7 @@ class NcursesDisplay(object):
             # pylint: disable=star-args
             code, index = self.dialog.menu(message, **menu_options)
 
-            if code == CANCEL:
+            if code == CANCEL or index == "":
                 return code, -1
 
             return code, int(index) - 1