Fix conditional require for nrepl stuff idempotent

Author: benedekfazekas

src/refactor_nrepl/middleware.clj

@@ -10,15 +10,16 @@
 ;; Compatibility with the legacy tools.nrepl and the new nREPL 0.4.x.
 ;; The assumption is that if someone is using old lein repl or boot repl
 ;; they'll end up using the tools.nrepl, otherwise the modern one.
-(if (find-ns 'clojure.tools.nrepl)
-  (require
-   '[clojure.tools.nrepl.middleware :refer [set-descriptor!]]
-   '[clojure.tools.nrepl.misc :refer [response-for]]
-   '[clojure.tools.nrepl.transport :as transport])
-  (require
-   '[nrepl.middleware :refer [set-descriptor!]]
-   '[nrepl.misc :refer [response-for]]
-   '[nrepl.transport :as transport]))
+(when-not (resolve 'set-descriptor!)
+    (if (find-ns 'clojure.tools.nrepl)
+      (require
+       '[clojure.tools.nrepl.middleware :refer [set-descriptor!]]
+       '[clojure.tools.nrepl.misc :refer [response-for]]
+       '[clojure.tools.nrepl.transport :as transport])
+      (require
+       '[nrepl.middleware :refer [set-descriptor!]]
+       '[nrepl.misc :refer [response-for]]
+       '[nrepl.transport :as transport])))
 
 (defn- require-and-resolve [sym]
   (require (symbol (namespace sym)))