Revert "refactor(agent): remove obsolete CleanOldServices function"

This reverts commit eea8f42.

Author: mjabascal10

agent/serv/clean-old.go

@@ -0,0 +1,41 @@
+package serv
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"github.com/utmstack/UTMStack/agent/config"
+	"github.com/utmstack/UTMStack/agent/utils"
+)
+
+func CleanOldServices(cnf *config.Config) {
+	oldVersion := false
+
+	if oldVersion {
+		utils.Logger.Info("old version of agent found, downloading new version")
+
+		if runtime.GOOS != "darwin" {
+			if err := utils.DownloadFile(fmt.Sprintf(config.DependUrl, cnf.Server, config.DependenciesPort, fmt.Sprintf(config.UpdaterSelf, "")), map[string]string{}, fmt.Sprintf(config.UpdaterSelf, "_new"), utils.GetMyPath(), cnf.SkipCertValidation); err != nil {
+				utils.Logger.LogF(100, "error downloading updater: %v", err)
+				return
+			}
+		}
+
+		oldFilePath := filepath.Join(utils.GetMyPath(), fmt.Sprintf(config.UpdaterSelf, ""))
+		newFilePath := filepath.Join(utils.GetMyPath(), fmt.Sprintf(config.UpdaterSelf, "_new"))
+
+		utils.Logger.LogF(100, "renaming %s to %s", newFilePath, oldFilePath)
+		err := os.Remove(oldFilePath)
+		if err != nil {
+			utils.Logger.LogF(100, "error removing old updater: %v", err)
+		}
+		err = os.Rename(newFilePath, oldFilePath)
+		if err != nil {
+			utils.Logger.LogF(100, "error renaming updater: %v", err)
+		}
+	} else {
+		utils.Logger.LogF(100, "no old version of agent found")
+	}
+}