Add sysfs method to get battery charge for linux

internal/lib/batteries.go

@@ -16,10 +16,14 @@ import (
 // UpdateBatteryInfo updates info about battery charge.
 func (c *MyConfig) UpdateBatteryInfo() {
 	var (
+		ch                 int
+		status             string
+		Batts              string
 		InitialDelay       = 100 * time.Millisecond
 		LoopIterationDelay = 5 * time.Second
 		Delay              = InitialDelay
 		ticker             = time.NewTicker(Delay)
+		batteries          []*battery.Battery
 	)
 
 	for range ticker.C {
@@ -28,17 +32,8 @@ func (c *MyConfig) UpdateBatteryInfo() {
 			ticker.Reset(Delay)
 		}
 
-		var (
-			batteries []*battery.Battery = []*battery.Battery{}
-			Batts     string
-			ch        int
-			status    string
-		)
-
 		if c.Battery.UseSysfs {
-			for _, file := range c.Battery.SysfsFiles {
-				var batt battery.Battery
-
+			for battNum, file := range c.Battery.SysfsFiles {
 				_, err := os.Stat(file)
 
 				// If file exists.
@@ -57,7 +52,7 @@ func (c *MyConfig) UpdateBatteryInfo() {
 
 					myCharge = strings.Trim(string(b), "\n")
 
-					statusFile := filepath.Dir(file) + "/status"
+					statusFile := filepath.Dir(file) + "status"
 
 					// If file exists.
 					if !os.IsNotExist(err) {
@@ -76,15 +71,15 @@ func (c *MyConfig) UpdateBatteryInfo() {
 					// Make stub battery class :) .
 					switch myStatus {
 					case "Charging":
-						batt.State.Raw = battery.Charging
+						batteries[battNum].State.Raw = battery.Charging
 					case "Discharging":
-						batt.State.Raw = battery.Discharging
+						batteries[battNum].State.Raw = battery.Discharging
 					case "Empty":
-						batt.State.Raw = battery.Empty
+						batteries[battNum].State.Raw = battery.Empty
 					case "Full":
-						batt.State.Raw = battery.Full
+						batteries[battNum].State.Raw = battery.Full
 					default:
-						batt.State.Raw = battery.Unknown
+						batteries[battNum].State.Raw = battery.Unknown
 					}
 
 					ch, err := strconv.Atoi(myCharge)
@@ -94,9 +89,7 @@ func (c *MyConfig) UpdateBatteryInfo() {
 						continue
 					}
 
-					batt.Current = float64(ch)
-
-					batteries = append(batteries, &batt)
+					batteries[battNum].Current = float64(ch)
 				}
 			}
 		} else {

internal/lib/config.go

@@ -783,10 +783,7 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 	// sampleConfig.Battery.UseSysfs will be false if not set in config
 
 	if len(sampleConfig.Battery.SysfsFiles) == 0 {
-		sampleConfig.Battery.SysfsFiles = append(
-			sampleConfig.Battery.SysfsFiles,
-			"/sys/class/power_supply/BAT0/capacity",
-		)
+		sampleConfig.Battery.SysfsFiles[0] = "/sys/class/power_supply/BAT0/capacity"
 	}
 
 	if sampleConfig.Battery.Color == "" {