I'm sending a corrected version of the wrapper, because the original
doesn't show errors returned by (refresh), and these are actually
critical. The corrected version:
:init (do
(require '[clojure.tools.namespace.repl :refer [refresh]])
(defn r []
(let [result (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 ...)) to get the post-refresh namespace object
(.addAlias (the-ns 'user) sym (the-ns (ns-name target-ns))))
result)))
Ivan
On Sun, May 4, 2014 at 8:24 AM, Ivan Kozik <i...@ludios.org> wrote:
> 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 <i...@ludios.org> 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 <petrg...@gmail.com> 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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