Add awesome configuration

config/awesome/widgets/battery.lua

@@ -0,0 +1,50 @@
+-------------------------------------------------
+-- Battery widget
+-------------------------------------------------
+
+local awful = require "awful"
+local gears = require "gears"
+local wibox = require "wibox"
+
+local text = wibox.widget {
+  font = "Hack 11",
+  widget = wibox.widget.textbox,
+}
+
+local widget = wibox.widget.background()
+widget:set_widget(text)
+
+gears.timer {
+  timeout = 20,
+  autostart = true,
+  call_now = true,
+  callback = function()
+    awful.spawn.easy_async_with_shell("cat /sys/class/power_supply/BAT*/uevent", function(out)
+      local capacity_raw = string.match(out, "POWER_SUPPLY_CAPACITY=%d*")
+      local capacity = string.sub(string.match(capacity_raw, "=%d*"), 2)
+
+      if tonumber(capacity) ~= 100 then
+        local status_raw = string.match(out, "POWER_SUPPLY_STATUS=%u")
+        local status_stripped = string.match(status_raw, "=%u")
+        local status_letter = string.match(status_stripped, "%u"):lower()
+
+        text:set_text("ba:" .. capacity .. status_letter)
+
+        local not_charging = status_letter == "d"
+        local is_bat_low = tonumber(capacity) < 21
+        local color = "#d2d4de"
+
+        if not_charging and is_bat_low then
+          color = "#e27878"
+        end
+
+        widget:set_fg(color)
+      else
+        text:set_text "ba:full"
+        widget:set_fg "#b4be82"
+      end
+    end)
+  end,
+}
+
+return widget