From 5fc9d78a1f8b6d9f422564fdcf2c76cde4a3c347 Mon Sep 17 00:00:00 2001
From: Cocoa Oikawa <0xbbc@0xbbc.com>
Date: Thu, 5 Jul 2018 15:20:50 +0800
Subject: [PATCH] in case of newline at the end of userlist file

It's a habit for some developers to append a newline at the end of the file, but line 82 did not take this into consideration. And the consequence is that JupyterHub would keep restarting.
---
 jupyterhub_config.py | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/jupyterhub_config.py b/jupyterhub_config.py
index c81161b..aef784c 100644
--- a/jupyterhub_config.py
+++ b/jupyterhub_config.py
@@ -78,7 +78,9 @@ with open(os.path.join(pwd, 'userlist')) as f:
         if not line:
             continue
         parts = line.split()
-        name = parts[0]
-        whitelist.add(name)
-        if len(parts) > 1 and parts[1] == 'admin':
-            admin.add(name)
+        # in case of newline at the end of userlist file
+        if len(parts) >= 1:
+            name = parts[0]
+            whitelist.add(name)
+            if len(parts) > 1 and parts[1] == 'admin':
+                admin.add(name)