feat(logger): configure log file path thorugh global options

Former-commit-id: 577d89f4fb

olm/olm.go

@@ -100,6 +100,17 @@ func Init(ctx context.Context, config GlobalConfig) {
 
 	logger.GetLogger().SetLevel(util.ParseLogLevel(config.LogLevel))
 
+	if config.LogFilePath != "" {
+		logFile, err := os.OpenFile(config.LogFilePath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o644)
+		if err != nil {
+			logger.Fatal("Failed to open log file: %v", err)
+		}
+
+		// TODO: figure out how to close file, if set
+		logger.SetOutput(logFile)
+		return
+	}
+
 	logger.Debug("Checking permissions for native interface")
 	err := permissions.CheckNativeInterfacePermissions()
 	if err != nil {
@@ -306,7 +317,7 @@ func StartTunnel(config TunnelConfig) {
 			if config.FileDescriptorTun != 0 {
 				return olmDevice.CreateTUNFromFD(config.FileDescriptorTun, config.MTU)
 			}
-			var ifName = interfaceName
+			ifName := interfaceName
 			if runtime.GOOS == "darwin" { // this is if we dont pass a fd
 				ifName, err = network.FindUnusedUTUN()
 				if err != nil {
@@ -315,7 +326,6 @@ func StartTunnel(config TunnelConfig) {
 			}
 			return tun.CreateTUN(ifName, config.MTU)
 		}()
-
 		if err != nil {
 			logger.Error("Failed to create TUN device: %v", err)
 			return
@@ -361,7 +371,6 @@ func StartTunnel(config TunnelConfig) {
 				for {
 					conn, err := uapiListener.Accept()
 					if err != nil {
-
 						return
 					}
 					go dev.IpcHandle(conn)

olm/types.go

@@ -15,6 +15,7 @@ type WgData struct {
 type GlobalConfig struct {
 	// Logging
 	LogLevel    string
+	LogFilePath string
 
 	// HTTP server
 	EnableAPI  bool