This thread seems to have gotten way off track and I think that Stuart made a very important point in the original post that's getting lost. It would help all of us out if library authors stopped making their libraries dependent on 10+ other libraries. This issue does have the potential to really drag on Clojure adoption. Just try to maintain your own local repository for your projects and you'll see what I mean the first time you need to add a Clojure dependency.
On Tuesday, May 14, 2013 4:22:59 AM UTC-5, Phillip Lord wrote: > > Stuart Sierra <ma...@stuartsierra.com <javascript:>> writes: > > On Tue, May 14, 2013 at 3:25 AM, Phil Hagelberg > > <ph...@hagelb.org<javascript:>> > wrote: > > > >> It's really not difficult to do if you limit yourself to Clojure since > >> Clojure namespaces are first-class and easy to manipulate at > >> run-time. We implemneted a prototype of this in under two hours at a > >> Seajure meeting a while back: > >> > >> https://github.com/technomancy/metaverse > >> > >> However, it's significantly more difficult to do for arbitrary Java > >> bytecode. > >> > > > > > > That's cool, and it will work for the simple case of libraries A and B > > depending on different versions of C. > > > > But it still breaks down in more complex cases: e.g. if I want to share > > data between A and B using a protocol or type defined in C, and there > are 2 > > incompatible versions of C. Even ClassLoaders can't help you there - I'm > > not aware of any solution. > > > Automatically, no, but the solution would be to use something akin to an > adaptor. The two versions of C would be manipulated to be in different > namespaces; now you just have two libraries, so the task of plumbing > them together remains the same. > > To be honest, though, this is unlikely; after all, if you are using A > and B, and they are using C *as a utility*, my feeling is that C > shouldn't really be in their public interface. If C *is* in their public > interface, then again, you need adaptors. > > Or you can fork A and/or B, fix them to use the same version! > > Phil > -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
