Default to --v2 arguments.

[justin]

As part of modernizing mogenerator for a 2.0 (or whatever we call it), I’ve removed the —v2 argument and now we generate Objective-C using ARC, Objective-C literals, and modules out of the box.

There’s still some stuff I don’t like about our Objective-C code I’d like to fix. Namely, the structs for attribute names need to be marked __unsafe_unretained because ARC doesn’t support objects in a struct. I wasn’t sure of a better way to handle that without adding a bunch of extra code.

I’d also like to add nullability attributes to Objective-C where appropriate, but we can save that for another day (Patches Welcomed!)

This is obviously a breaking change, and I always opt to go fairly heavy handed on that in favor of moving the project forward. Feedback welcomed.

[rentzsch]

👍 Kinda sad to see --v2 go since that was my strategy to easily allow mogenerator to support future stuff while seamlessly supporting old projects. That said, I think your direction of just dropping backwards compatibility and requiring folks just use older version is far, far, far more practical given the manpower this project has. I'd much prefer being able to address the present than support the past.

[justin]

My thinking was to make modern Objective-C the default for now and maintain a --swift flag as the alternative. Then someday in the future, flip those or whatever depending on how Apple treats our old bracketed language friend.