Porting 1.x libraries to 2.x

[John C]

What strategies do library authors have for maintaining two versions of a their code - one for D 1.0 and another for 2.0? When they make changes to one version, do they manually copy them into the other branch? Or is there a way of automating the process?

Version blocks don't seem to help much.

I'm finding it very tedious and somewhat haphazard going the manual route - it's easy to forget, and sometimes I get so carried away adding new code to my 1.0 library that it's a struggle to recall every line I've changed.

Ideally, I'd just update the 1.0 branch and run a script to make the necessary changes for it to compile with DMD 2.0. Do Unix/Linix people use the patch command for this (and is there a Windows equivalent)?

Thanks,
John.