add optional busses param to add_channels_for; look at pylon.channels

1 files changed, 6 insertions, 3 deletions

diff --git a/main.lua b/main.lua
index c06651f..3e47b13 100644
--- a/main.lua
+++ b/main.lua
@@ -46,11 +46,14 @@ function Wilson.make(cls, conf)
 	return self
 end
 
-function Wilson.add_channels_for(self, pylon)
+function Wilson.add_channels_for(self, pylon, busses)
 	if not pylon.channels then return end
-	for busname, bus in pairs(self.busses) do
+	busses = busses or self.busses
+	for busname, bus in pairs(busses) do
 		for _, channel in ipairs(bus) do
-			if channel.pylon == pylon then
+			if  channel.pylon == pylon
+				and not pylon.channels[channel.id]
+			then
 				pylon:add_channel(channel)
 end end end end