use nrepl, not eval

[pdenno]

As the subject suggests, this is a major change. Writing a reliable REPL, which is where this code seemed to be heading, is a lot of work. tools.nrepl is a REPL solution made just for this sort of problem, and it is tested (used by emacs/cider etc.) and solid. See the section why nREPL? at tools.nrepl github.

I have not experienced any problems changing namespaces in this fork. I implemented stacktraces using code from cider-nrepl.

[pdenno]

Apparently I still don't quite understand how squashing commits works. Thus the 3 commits...Sorry.

[roryk]

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[roryk]

Thank you so so so so so so so much, Peter. This is incredible. I am so happy, it would have taken me forever to figure that out. I gave you push access to the repository, as far as I am concerned you should own it.

[pdenno]

Well thanks for all the work on Zero MQ and the interface with the the
notebook! That would have taken me ages to figure out, and I probably
wouldn't have taken on the work had I not seen something "close enough"
to usable in clojupyter.

On 2016-02-18 9:58 PM, Rory Kirchner wrote:

Thank you so so so so so so so much, Peter. This is incredible. I am
so happy, it would have taken me forever to figure that out. I gave
you push access to the repository, as far as I am concerned you should
own it.

—
Reply to this email directly or view it on GitHub
#14 (comment).

[roryk]

Sweet, I have been walking around happy today. These bugs were weighing on me and I didn't realize it. Thanks so much!

[thomasjm]

@pdenno , it seems this PR actually broke something basic: you can no longer print to stdout. I.e. something like (prn "HI") doesn't show any output other than the nil result.

I think the reason is that stdout used to be captured by the (binding [*out* s#] ...) currently at core.clj:282, back when this kernel worked using eval.

In the world of nrepl-eval, I'm not sure how stdout capturing should work. Any chance you know how to add it back? :)