yes, I'm very commit lazy

awesome/src/widgets/systray.lua

@@ -3,47 +3,48 @@
 --------------------------------
 
 -- Awesome Libs
-local dpi = require("beautiful").xresources.apply_dpi
-local gears = require("gears")
-local wibox = require("wibox")
+local dpi = require('beautiful').xresources.apply_dpi
+local wibox = require('wibox')
 
-local capi = {
-  awesome = awesome,
-}
+local capi = { awesome = awesome }
 
+-- Systray theme variables
 Theme.bg_systray = Theme_config.systray.bg
 Theme.systray_icon_spacing = dpi(10)
 
-return function(s)
+return function()
   local systray = wibox.widget {
     {
       {
         wibox.widget.systray(),
+        id = 'systray_margin',
         widget = wibox.container.margin,
-        id = 'st'
       },
-      strategy = "exact",
+      strategy = 'exact',
       widget = wibox.container.constraint,
-      id = "container"
     },
     widget = wibox.container.background,
-    shape = function(cr, width, height)
-      gears.shape.rounded_rect(cr, width, height, dpi(6))
-    end,
+    shape = Theme_config.systray.shape,
     bg = Theme_config.systray.bg
   }
 
-  capi.awesome.connect_signal("systray::update", function()
+  local systray_margin = systray:get_children_by_id('systray_margin')[1]
+
+  -- Wait for an systray update
+  capi.awesome.connect_signal('systray::update', function()
+    -- Get the number of entries in the systray
     local num_entries = capi.awesome.systray()
 
+    -- If its 0 remove the margins to hide the widget
     if num_entries == 0 then
-      systray.container.st:set_margins(0)
+      systray_margin:set_margins(0)
     else
-      systray.container.st:set_margins(dpi(6))
+      systray_margin:set_margins(dpi(6))
     end
   end)
 
-  systray.container.st.widget:set_base_size(dpi(24))
+  -- Set the icon size
+  systray_margin.widget:set_base_size(dpi(24))
 
   return systray
 end