Ensure you have hammerspoon installed.
Hammerspoon bundles lua@5.3 at the moment.
You should install lua@5.3 with homebrew here: Hammerspoon/hammerspoon#363 (comment)
brew tap homebrew/versions
brew install lua53
This will allow you to use luarocks.
Use luarocks-5.3 instead of luarocks. E.g:
luarocks-5.3 install foo
You must install:
luarocks-5.3 install inspect
⌘ ⌥ ⇧ ⌃ ⇪ Fn ⟵ ⟶ ↑ ↓
⌘ ⌥ ⌃ n = Layout all windows
⌘ ⌥ ⌃ ⟵/⟶ = Push to left or right window
Fn ⌘ ⌥ ⌃ ⟵/⟶ = Push to left 2/3 or right 2/3 of window
Fn ⌃ ⇧ ⟶ = Push to left or right screen
⌘ ⌥ ⌃ b = Toggle between 2/3 or 1/2 screen width for windows wheen using "layout all windows" shortcut.
⌘ ⌥ p = Disable
luarocks-5.3 install inspect
In the Hammerspoon console type for example:
require('inspect')(hs.screen.allScreens())
To read userdata entries (C pointers), you can only read the metatable (keys) data with inspect, otherwise you must use function calls. This can be useful to see what functions are available.
require('inspect')(getmetatable(hs.screen.allScreens()[1]))