[xwiki-devs] [Proposal] Nested Spaces support for Contrib Applications

Hello devs, Since I already experimented the Nested Spaces behaviour on the Forum application and there are other applications that might need it also, I think it's time to start discussing this topic and to decide what strategy should be implemented on contrib applications. What I have done in the Forum app was to handle both Pre NS and NS versions of XWiki, writing specific code for each case (wrapped in if-else statements), which proved to be the most complex and hard to maintain way, without much benefit. Sooner or later, everybody will have a NS Xwiki version and then all the support for Pre NS would become useless and then the code should be cleaned, which would be a lot of work again. Besides this already tried strategy, there are some others to be discused: 1: Support both Pre NS and NS versions but in different branches. 2: Move to NS, but keep fixing bugs for Pre NS in a separate branch. (This is what I'm proposing) 3: Move to NS without any maintance on Pre NS. 4: Others? In all the cases, a data migration should be performed. What we decide to do? Thanks, Alex