If no external monitors, we're basically done

bin/switch-sway-display

@@ -67,6 +67,11 @@ def main():
     screens = json.loads("\n".join(run('swaymsg -t get_outputs')))
     laptop = [s for s in screens if s['name'] == 'eDP-1'][0]
     externals = [s for s in screens if s['name'] != 'eDP-1']
+
+    if len(externals) == 0:
+        run(f"swaymsg output {laptop['name']} enable")
+        return
+
     external = externals[0]
     if len(externals) > 1:
         sys.stderr.write(f"Multiple external monitors. Ignoring all but {external['name']}")