Hi Solo, I did a big migration from 1.2 to 1.5 at work this past February. Here are a few of the things that I gleaned from that experience, i addition to the great advice mentioned already in this thread:
* with 1000's of these applications, I'd take the approach of only migrating to 1.5 when there's a change needed, because there's a good chance a lot of them will never need to be modified. Any extra apps you need to migrate could be work down the drain. * on the other hand, you can get a nice groove going, and may want to do a bunch of reports in one go. The changes you may find can be repetitive. * to make sure you are only including namespaces that absolutely need to be used by your application, AND to convert the ns declarations into 1.5 format automatically I used https://github.com/technomancy/slamhound. Watch out for any macro-heavy code though, because Slamhound can miss dependencies used exclusively in macros. * are these reports tested? If not well tested be wary, because there were a lot of number-related changes from 1.2 to 1.3 * keep an eye out for duplicated patterns in the reports. If there are some common pieces you might be able to just migrate those to 1.5 and use them as a library for the other reports. YMMV. * Best, Alex On Tue, Dec 24, 2013 at 10:48 AM, Sean Corfield <seancorfi...@gmail.com>wrote: > On Tue, Dec 24, 2013 at 7:23 AM, <solo.l...@gmail.com> wrote: > > Yes, after looking into this, upgrading the libraries before upgrade the > > Clojure version is unfeasible in our case. I prefer not to keep a 1.2 > > environment around forever but take our time phasing it out to avoid > service > > disruption. I think the dual environment consensus here is the way to go. > > Please keep us posted on how this goes - I think it's an interesting > case study for what happens with a large legacy code base. > > Fortunately the 1.2 -> 1.3 changes were the biggest we've had to deal > with so far and all the signs indicate we won't have to deal with that > again, so this is a pain that only early adopters will be feeling. > -- > Sean A Corfield -- (904) 302-SEAN > An Architect's View -- http://corfield.org/ > World Singles, LLC. -- http://worldsingles.com/ > > "Perfection is the enemy of the good." > -- Gustave Flaubert, French realist novelist (1821-1880) > > -- > -- > 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. > -- -- 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.
