-- Provides:
-- signal::cpu
--      used percentage (integer)
local awful = require("awful")

local update_interval = 5
local cpu_idle_script = [[
  sh -c "
  vmstat 1 2 | tail -1 | awk '{printf \"%d\", $15}'
  "]]

-- Periodically get cpu info
awful.widget.watch(cpu_idle_script, update_interval, function(widget, stdout)
	-- local cpu_idle = stdout:match('+(.*)%.%d...(.*)%(')
	local cpu_idle = stdout
	cpu_idle = string.gsub(cpu_idle, "^%s*(.-)%s*$", "%1")
	awesome.emit_signal("signal::cpu", 100 - tonumber(cpu_idle))
end)