From 91469d26721792235c9110524cb3b988ecc2708f Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Tue, 10 Oct 2017 18:04:45 +0200
Subject: [PATCH] allow setting token via JUPYTER_TOKEN env

more convenient for certain deployments than CLI arguments
---
 notebook/notebookapp.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/notebook/notebookapp.py b/notebook/notebookapp.py
index e355b23bd..51425b3e7 100755
--- a/notebook/notebookapp.py
+++ b/notebook/notebookapp.py
@@ -662,6 +662,9 @@ class NotebookApp(JupyterApp):
 
     @default('token')
     def _token_default(self):
+        if os.getenv('JUPYTER_TOKEN'):
+            self._token_generated = False
+            return os.getenv('JUPYTER_TOKEN')
         if self.password:
             # no token if password is enabled
             self._token_generated = False