So I made my windows have rounded borders using
c.shape = gears.shape.rounded_rect
But this affects my menu bar as well (I'm using polybar) is there a way to say
if not menubar
when I tried this it made everything have sharp corners. But I only want the menubar to have sharp corners.
You can use various properties to match certain clients, such as c.class or c.name (see here for a full list of properties on a client object).
To find out the value to match against, run xprop in a terminal and click on your polybar.
It will then list various properties where WM_NAME maps to c.name and WM_CLASS will list c.instance and c.class in that order, separated by a comma.
For your use case, matching against c.class would be the recommended approach, as this translates to "match against any instance of the application polybar". It should then look similar to this:
if c.class ~= "polybar" then
c.shape = gears.shape.rounded_rect
end
where you replace polybar with the value you got from xprop.
