added getting ENV vars from Vault

cmd/version.go

@@ -16,15 +16,20 @@ var (
 		Run:   version,
 	}
 	numOnly bool
+	vPre    bool
 )
 
 func version(cmd *cobra.Command, args []string) {
 
 	cmd.PersistentFlags().BoolVarP(&numOnly, "num", "n", true, "Output the version number only.")
-	if numOnly {
+	cmd.PersistentFlags().BoolVarP(&vPre, "vpre", "V", false, "Output the version with v prefixed.")
+
+	if numOnly && !vPre {
 		fmt.Printf("%s\n", versionStr)
+	} else if vPre {
+		fmt.Printf("v%s", versionStr)
 	} else {
-		fmt.Printf("Version: %s", versionStr)
+		fmt.Printf("Backy version: %s", versionStr)
 	}
 
 	os.Exit(0)