[Fix 91] Unmap old nses syms after rename file/dir

as symbols in the renamed ns still resolve to the old namespace
dependents' ASTs are rebuilt with the wrong ns information in them. Fix is
to explicitly unmap syms of the old ns when doing rename so when the new
ASTs are built the new namespaces will be used.

src/refactor_nrepl/rename_file_or_dir.clj

@@ -96,12 +96,31 @@
                    (when (= dialect :cljs)
                      {:require-macros (update-libspecs require-macros old-ns new-ns)}))})))
 
-(defn- create-new-ns-form
+(defn- clean-var-entry
+  [ns-entry]
+  (-> (val ns-entry)
+      str
+      (str/replace "#'" "")))
+
+(defn- clean-interned-syms! [ns-name old-ns]
+  (doseq [[sym _]
+          (->> (ns-aliases ns-name)
+               (filter #(= (str old-ns) (clean-var-entry %))))]
+    (ns-unalias ns-name sym))
+  (doseq [[sym _]
+          (->> (ns-refers ns-name)
+               (filter #(.startsWith (clean-var-entry %) (str old-ns))))]
+    (ns-unmap ns-name sym)))
+
+(defn- create-new-ns-form!
   "Reads file and returns an updated ns."
   [file old-ns new-ns]
   (let [ns-form (core/read-ns-form file)
+        ns-name (second ns-form)
         parsed-ns (ns-parser/parse-ns file)
         deps (update-references-in-deps parsed-ns old-ns new-ns)]
+    (when (find-ns ns-name)
+      (clean-interned-syms! ns-name old-ns))
     (pprint-ns (rebuild-ns-form deps ns-form))))
 
 (defn- update-file-content-sans-ns
@@ -121,7 +140,7 @@
 (defn- update-dependent
   "New content for a dependent file."
   [file old-ns new-ns]
-  (str (create-new-ns-form file old-ns new-ns)
+  (str (create-new-ns-form! file old-ns new-ns)
        "\n"
        (update-file-content-sans-ns file old-ns new-ns)))