Here's a wrapper over (refresh) that updates the aliases in the user namespace
as well. You can put it in the :repl-options in your project.clj.
:init (do
(require '[clojure.tools.namespace.repl :refer [refresh]])
(defn r []
(refresh)
; https://github.com/clojure/tools.namespace#warnings-for-aliases
(doseq [[sym target-ns] (ns-aliases 'user)]
(ns-unalias 'user sym)
; (the-ns (ns-name ...)) gets the post-refresh namespace object
(.addAlias (the-ns 'user) sym (the-ns (ns-name target-ns))))))
Ivan
On Sun, May 4, 2014 at 7:40 AM, Ivan Kozik <[email protected]> wrote:
> Hi Petr,
>
> Did you see this?
> https://github.com/clojure/tools.namespace#warnings-for-aliases
>
> Also mentioned: "Aliases to reloaded namespaces will break if the
> namespace containing the alias is not reloaded also."
>
> I've been writing per-project wrappers over the refresh function to do
> the ns-unalias+alias calls. I wonder if it would be feasible to have
> something that keeps track of just aliases in the user namespace, and
> do the re-aliasing after a refresh.
>
> Ivan
>
> On Sat, May 3, 2014 at 4:04 PM, Petr <[email protected]> wrote:
>> Hello.
>>
>> I experienced non obvious behavior of "require namespace as alias" when
>> using clojure.tools.namespace.repl/refresh.
>> If I use aliased namespace then after changing source files and call to
>> refresh I seem to have old values in that alias. If I use plain require all
>> seem to work as expected, new definitions take effect after reload.
>>
>> For example, in first case:
>> (ns a (require [b :as b-alias]))
>> (println b-alias/x) ; original value
>> ; change sources of b or it's dependencies
>> (clojure.tools.namespace.repl/refresh)
>> (println b-alias/x) ; original value
>> ; and also
>> (println b/x) ; new value
>>
>> In second case:
>> (ns a (require [b]))
>> (println b/x) ; original value
>> ; change sources of b or it's dependencies
>> (clojure.tools.namespace.repl/refresh)
>> (println b/x) ; new value
>>
>> Can anyone explain why require acts like this? Does it mean that alias is
>> not just naming change but some data structure in memory?
>>
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