So I got to the bottom bottom of the problem here. This is a scenario:
1) Library A depends on library B and Clojure 1.10 2) Library B must be AOTed due to a gen-class, but depends on Clojure 1.9 3) Library A does not work, because it is now using the Clojure core spec 1.9 compiled transitively through the Library B AOT, and found in its Jar, since .class get precedence over source files. So, this means that a library with a dependency on another one that is AOT can cause spec conflicts. This is new now that spec is out. And so I first caught this when some of our libs were using 1.9, and I started moving others to 1.10. The way I solved this is by hacking our build, so that the clojure compiled classes from the AOT don't get included in the Jar after they are compiled. In my opinion, this is a bit of a problem. What would be nice is either to have a way to compile only a gen-class, and not the namespace that contains it. Or not compile things transitively. Or maybe just a way for compile to exclude clojure core namespaces. Now, if you depend on libraries that don't need AOT, it is not an issue. But if you do, it forces you to re-compile all your dependencies and do a full big bang upgrade to the new Clojure version. You can't just use libs compiled with older versions of spec. While before, you were able to use libs compiled with older version of Clojure from packages that use newer version of Clojure. On Wednesday, 16 January 2019 20:47:43 UTC-8, Mark Derricutt wrote: > > On 16 Jan 2019, at 18:17, Alex Miller wrote: > > Yes, it's one of the downsides of AOT. > > I'd say it's not so much a downside of AOT - but of having a single output > path for classes. I've long wanted Chas's patch to be applied, or something > like it. > > Having everyone reinvent the mechanism whenever they happen to need AOT is > kind of annoying - rare, but still annoying. > ------------------------------ > > "The ease with which a change can be implemented has no relevance at all > to whether it is the right change for the (Java) Platform for all time." — > Mark Reinhold. > > Mark Derricutt > http://www.theoryinpractice.net > http://www.chaliceofblood.net > http://plus.google.com/+MarkDerricutt > http://twitter.com/talios > http://facebook.com/mderricutt > -- 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/d/optout.
