Added generic battery widget that uses acpi

awesome/battery.lua

@@ -8,35 +8,21 @@ local beautiful = require("beautiful")
 
 local previous_percent = 0
 
-function batteryInfo(adapter)
-    local fcur = io.open("/sys/class/power_supply/"..adapter.."/energy_now")
-    local fcap = io.open("/sys/class/power_supply/"..adapter.."/energy_full")
-    local cur = fcur:read()
-    local cap = fcap:read()
-    fcur:close()
-    fcap:close()
-
-    local battery = math.floor(cur * 100 / cap)
-
-    if battery > 100 then
-        battery = 100
-    end
-
-    return battery
+function batteryInfo()
+    local fd = io.popen('acpi | cut -d ":" -f 2 | cut -d "," -f 2 | tr -d "%"')
+    local percentage = fd:read('*all')
+    fd:close()
+    return tonumber(percentage)
 end
 
-function isCharging(adapter)
-
-    local fsta = io.open("/sys/class/power_supply/"..adapter.."/status")
-    local sta = fsta:read()
-    fsta:close()
-    return not sta:match("Discharging")
-
+function isCharging()
+    local _,_,error = os.execute('acpi | grep Discharging')
+    return error ~= 0
 end
 
 function update_battery()
 
-    local percent = batteryInfo('BAT0')
+    local percent = batteryInfo()
     local color
     local symbol
 
@@ -50,7 +36,7 @@ function update_battery()
         color="white"
     end
 
-    if isCharging('BAT0') then
+    if isCharging() then
         color = 'green'
         symbol = '⚡'
     else