From d1e54c86b109a4d4743d43863cf34a89271e0a70 Mon Sep 17 00:00:00 2001
From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Mon, 8 Feb 2016 22:39:20 +0100
Subject: [PATCH] gui/applets: log warning if IPC address not in command

---
 artiq/gui/applets.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/artiq/gui/applets.py b/artiq/gui/applets.py
index 868842018..a9fc4acf5 100644
--- a/artiq/gui/applets.py
+++ b/artiq/gui/applets.py
@@ -98,6 +98,9 @@ class AppletDock(dockarea.Dock):
 
     async def start(self):
         self.ipc = AppletIPCServer(self.datasets_sub)
+        if "{ipc_address}" not in self.command:
+            logger.warning("IPC address missing from command for %s",
+                           self.applet_name)
         command = self.command.format(python=sys.executable,
                                       ipc_address=self.ipc.get_address())
         logger.debug("starting command %s for %s", command, self.applet_name)