How to write a script for multiple routeros versions

RouterOS Scripting
1

I’m scripting for v4.x and v5.x routerOS but some commands are differents in versions. As an example, to set a remote logging server

/ system logging action

in v4

set remote name="remote" target=remote remote=xxx.xxx.xxxx.xxx:514

while in v5

set remote name="remote" target=remote remote=xxx.xxx.xxxx.xxx remote-port=514

Obviously the remote-port attribute isn’t recognised in v4.
Is there a way to wrrite code for both versions? I tried something like this

:if ([/system package get system version] > 5) do={
    set remote name="remote" target=remote remote=10.20.0.1 remote-port=514
} else={
    set remote name="remote" target=remote remote=10.20.0.1:514
}

which works in v5 while in v4 give an error in the remote-port attribute.
Suggests?

2

You can use :parse to run commands. For example:

:local cmdv5 [:parse "set remote name=\"remote\" target=remote remote=10.20.0.1 remote-port=514"];
:local cmdv4 [:parse "set remote name=\"remote\" target=remote remote=10.20.0.1:514"];

:if ([/system package get system version] > 5) do={
    $cmdv5;
} else={
    $cmdv4;
}
3

mrz,
I think there’s a bigger issue here as well. It would be nice to keep backward compatibility when adding new functionality/properties. (This would help me tremendously).