Added optionality to duration attribute

Author: itedya

main.go

@@ -27,10 +27,12 @@ func main() {
 return
 }
 
-err = removeOldFiles(backupTo, duration)
-if err != nil {
-log.Fatal(err)
-return
+if duration != "" {
+err = removeOldFiles(backupTo, duration)
+if err != nil {
+log.Fatal(err)
+return
+}
 }
 
 return

terminalArgs.go

@@ -27,13 +27,18 @@ func RunCMD(path string, args []string) (out string, err error) {
 }
 
 func parseTerminalArguments() (string, string, string, error) {
-if len(os.Args) != 4 {
-return "", "", "", errors.New("Specify 2 arguments! Backup From, Backup To and Duration")
+if len(os.Args) != 4 && len(os.Args) != 3 {
+return "", "", "", errors.New("Specify 2 or 3 arguments! Backup From, Backup To and Duration (optional)")
 }
 
 backupFrom := os.Args[1]
 backupTo := os.Args[2]
-duration := os.Args[3]
+var duration string
+if len(os.Args) == 3 {
+duration = ""
+} else {
+duration = os.Args[3]
+}
 
 if _, err := os.Stat(backupFrom); os.IsNotExist(err) {
 return "", "", "", errors.New("Backup from path doesn't exist!")