Ags4 modern command line

[jeancallisti]

No description provided.

[ivan-mogilko]

Since this is related to the larger engine update, I may suggest to first of all clarify command line syntax rules. In the past the commands were added without much thinking about this, except we moved to using double dashes ("--") before multicharacter option names following the unix standard. But some things may be still inconsistent, both among ags commands, or compared to the widely used conventions. Thus, I think it may be a good idea to clarify that, especially for commands which have arguments, and multiple arguments.

[ericoporto]

I have been thinking about this, and still don't have a good idea for the interface of passing the number of expected parameters for a flag, in theory I think nice flags should have just one parameter but unfortunately we do have some flags that take multiple parameters in ags. It could either use something like ^3 in the string or use a set of pair string,int.

Since this is for ags4, we could alternatively redesign the command line interface where it takes multiple parameters for one --key? Like either separate them without using spaces or use multiple flags or have a comma.