Honor :init-ns namespace on startup

[weissjeffm]

When I have :repl-options {:init-ns 'my-ns}

and then i run nrepl-jack-in, the starting namespace is still user.

My purpose in using these lein options is to avoid having to type the same thing every time I start a repl. require the namespace, switch to it, etc. Would be nice if it were just "ready" on startup.

Edit: i forgot to mention, the server side does already switch namespaces correctly, it is just not reflected on the emacs side.

[weissjeffm]

Here's a little elisp workaround. Theoretically it could go into nrepl.el as-is, but I'm sure there are better ways to accomplish it.

(add-hook 'nrepl-connected-hook 
  (lambda () (nrepl-set-ns (plist-get
                 (nrepl-send-string-sync "(symbol (str *ns*))") :value))))

I did not test this with multiple nrepl sessions, hopefully it would only affect the session being opened.

[jonpither]

Arguably this fix has yielded a bug, in that say you have a project.clj without an :init-ns, but you do have a :main namespace specified, then when you launch a REPL session you'll be put in the :main namespace.

This mirrors nrepl's behavour as "lein repl" will also put you in the namespace specified by main. This then forces you to have an :init-ns, which does then override :main.

I didn't raise a new issue for this because it's arguably an issue with nrepl. I see the nrepl github has issues disabled for some reason.

[bbatsov]

It's Clojure policy. nREPL bugs should be reported to its JIRA issue tracker http://dev.clojure.org/jira/browse/NREPL