clojure.tools.namespace.repl/refresh not working

Question

I have this clojure file:

(ns foo.core)

(def bar 1)

And this project.clj:

(defproject foo "version"
  :dependencies [[org.clojure/clojure "1.6.0"]]
  :main foo.core)

I open a terminal and run lein repl. Then I change the value of bar OUTSIDE the repl.

(def bar 1)

to

(def bar 2)

I change this value on the editor and don't forget to save the file. Then I run the command in the repl (load-string "(clojure.tools.namespace.repl/refresh)") I type bar in the repl and still get 1 instead of 2. However if you just run (clojure.tools.namespace.repl/refresh) and then query the value of bar you get 2. Why is this so? Why is the function load-string breaking it?

Antony Woods · Accepted Answer · 2016-08-04 10:35:29Z

2

Apparently, specifying a :main in your project.clj forces the project to use AOT which breaks this.

Source: http://dev.clojure.org/jira/browse/TNS-27

answered Aug 4, 2016 at 10:35

Antony Woods

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1 Comment

Josh.F Over a year ago

rm -r target/ - Apparently, some artifact was left behind when I compiled with aot, so even when I removed it from my project.clj, it was still giving an error like OPs. So so so annoying, thanks for helping me isolate it @acron!

Arthur Ulfeldt · Accepted Answer · 2015-08-27 22:42:32Z

0

It's not how your invoking refresh, it's when you invoke it.

refresh uses timestamps on files to see when it needs to reload them. This way it only reloads things it needs to. Because you didn't change the file after redefining a var through the repl, it skipped loading that file.

if I start with a file like this:

(ns bla.core)  
(def bar 3)

and then call refresh the first time:

bla.core> (load-string"(clojure.tools.namespace.repl/refresh)")
:reloading (bla.core bla.core-test)
:ok

then redefine bar in the repl:

bla.core> (def bar :changed-from-repl)                                             
#'bla.core/bar

and refresh again:

bla.core> (load-string "(clojure.tools.namespace.repl/refresh)")
:reloading ()
:ok

we can see that it didn't reload any namespaces.

answered Aug 27, 2015 at 22:42

Arthur Ulfeldt

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1 Comment

Carlos Nunes Over a year ago

I edited my question to make it clearer. I actually change the value of bar outside the repl. I did that in an editor and save the file afterwards.

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