From 19a90b1cacb47a7bbb42e4ac7c7746885f92ac38 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Tue, 28 Jul 2015 21:39:19 +0200
Subject: [PATCH] Detect absence of a TTY, and refuse to use the CLI backend
 interactively in that case

Fixes #2
---
 cli_frontend.py | 2 ++
 lilass          | 1 -
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/cli_frontend.py b/cli_frontend.py
index 5e9d400..15d081c 100644
--- a/cli_frontend.py
+++ b/cli_frontend.py
@@ -26,6 +26,8 @@ class CLIFrontend(QuestionFrontend):
         print(message, file=sys.stderr)
 
     def userChoose (self, title, choices, returns, fallback):
+        if not sys.stdin.isatty():
+            raise Exception("Choosing the setup interactively is not possible, due to lack of a TTY")
         while True:
             # print question
             print(title)
diff --git a/lilass b/lilass
index 33b05fd..49dbeea 100755
--- a/lilass
+++ b/lilass
@@ -147,4 +147,3 @@ if __name__ == "__main__":
             turnOnBacklight()
     except Exception as e:
         frontend.error(str(e))
-        raise
-- 
2.30.2