hammerspoon init.lua

local spaces = require('hs.spaces') -- https://github.com/asmagill/hs._asm.undocumented.spaces

-- Switch alacritty
hs.hotkey.bind({'alt'}, 'space', function ()
	local APP_NAME = 'Alacritty'
	function moveWindow(alacritty, space, mainScreen)
		-- move to main space
		local win = nil
		while win == nil do
			win = alacritty:mainWindow()
		end
		print(win)
		print(space)
		print(win:screen())
		print(mainScreen)
		local fullScreen = not win:isStandard()
		if fullScreen then
			hs.eventtap.keyStroke('cmd', 'return', 0, alacritty)
		end
		winFrame = win:frame()
		scrFrame = mainScreen:fullFrame()
		print(winFrame)
		print(scrFrame)
		winFrame.w = scrFrame.w
		winFrame.y = scrFrame.y
		winFrame.x = scrFrame.x
		print(winFrame)
		win:setFrame(winFrame, 0)
		print(win:frame())
		spaces.moveWindowToSpace(win, space)
		if fullScreen then
			hs.eventtap.keyStroke('cmd', 'return', 0, alacritty)
		end
		win:focus()
	end
	local alacritty = hs.application.get(APP_NAME)
	if alacritty ~= nil and alacritty:isFrontmost() then
		alacritty:hide()
	else
		local space = spaces.activeSpaceOnScreen()
		local mainScreen = hs.screen.mainScreen()
		if alacritty == nil and hs.application.launchOrFocus(APP_NAME) then
			local appWatcher = nil
			print('create app watcher')
			appWatcher = hs.application.watcher.new(function(name, event, app)
				print(name)
				print(event)
				if event == hs.application.watcher.launched and name == APP_NAME then
					app:hide()
					moveWindow(app, space, mainScreen)
					appWatcher:stop()
				end
			end)
			print('start watcher')
			appWatcher:start()
		end
		if alacritty ~= nil then
			moveWindow(alacritty, space, mainScreen)
		end
	end
end)