Of course, the expression needs to be evaluated at runtime only :)
Presently, your jetty server gets started just after the expression is compiled.
When you want to defer evaluation at runtime when generating compiled code
ahead of time, you need to wrap expressions like these with this:
(def server (when-not *compile-files* (jetty/...
This will defer evaluation of the expression when the code actually runs,
not after it got compiled.
Remember, expressions are compiled then evaluated immediately.
Be cautious, you can get stuff started this way while building your targets.
It's unlikely that you want this to happen...
Luc P.
> So I was playing with AOT for the first time. My main reason to use it is
> so the consumer Java code doesn't look so alien / run-timey.
>
> The thing is, I encountered that the following line causes `lein compile`
> to hang:
>
> (def server (jetty/run-jetty #'app {:port 8000 :join? false}))
>
> (for those not familiar with Jetty, the expression causes a web server to
> launch.)
>
> I can sort of see why this code represents a fault, from a compiler's point
> of view. But OTOH, in e.g. Java it's not that much of a rare practice to
> bind a the result of a side-effectful op to a variable definition, right?
>
> My question is quite simply, why can't the given code compile? It is not
> entirely clear to me, as I don't thoroughly understand how Clojure's
> compiler works (or any compiler at all, for that matter).
>
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