Add cider-clojurec-eval-destination custom variable

CHANGELOG.md

@@ -8,8 +8,9 @@
 - [#3354](https://github.com/clojure-emacs/cider/issues/3354): Add new customization variable `cider-reuse-dead-repls` to control how dead REPL buffers are reused on new connections.
 - `cider-test`: add timing information.
 - `cider-test`: only show diffs for collections.
-- `cider-test`: fail-fast by default, as controlled by the new `cider-test-fail-fast` defcustom. 
+- `cider-test`: fail-fast by default, as controlled by the new `cider-test-fail-fast` defcustom.
 - Infer indentation specs when possible ([doc](https://docs.cider.mx/cider/indent_spec.html#indentation-inference)).
+- Add new customization variable `cider-clojurec-eval-destination` to allow specifying which REPL CLJC evals are sent to.
 
 ### Bugs fixed
 

cider-connection.el

@@ -105,7 +105,14 @@ Possible choices are `prompt', `auto', `any', and nil.
 (defconst cider-required-nrepl-version "0.6.0"
   "The minimum nREPL version that's known to work properly with CIDER.")
 
-
+(defcustom cider-clojurec-eval-destination 'multi
+  "The REPL type to be chosen in .cljc buffers."
+  :type '(choice (const :tag "Clojure" clj)
+                 (const :tag "ClojureScript" cljs)
+                 (const :tag "Multi (evaluate in Clojure and ClojureScript simultaneously)" multi))
+  :group 'cider
+  :package-version '(cider . "1.8"))
+
 ;;; Connect
 
 (defun cider-nrepl-connect (params)
@@ -812,7 +819,7 @@ For the REPL type use the function `cider-repl-type'."
   (with-current-buffer (or buffer (current-buffer))
     (cond
      ((derived-mode-p 'clojurescript-mode) 'cljs)
-     ((derived-mode-p 'clojurec-mode) 'multi)
+     ((derived-mode-p 'clojurec-mode) cider-clojurec-eval-destination)
      ((derived-mode-p 'clojure-mode) 'clj)
      (cider-repl-type))))
 

doc/modules/ROOT/pages/cljs/up_and_running.adoc

@@ -118,3 +118,12 @@ going to be evaluated twice, once in each of the REPLs.  In fact, you
 can create multiple clj and cljs sibling connections (kbd:[C-c C-x C-s C-s/j]) within a CIDER session and evaluation will be directed
 into all REPLs simultaneously. See xref:usage/managing_connections.adoc[Managing
 Connections] for more details.
+
+If you would prefer to evaluate `cljc` files in only one of the matching REPLs, you can customize the variable `cider-clojurec-eval-destination` to either `clj` or `cljs`.  For example, to evaluate `cljc` files in the ClojureScript REPL only, add the following to your Emacs configuration:
+
+[source,lisp]
+----
+(setq cider-clojurec-eval-destination 'cljs)
+----
+
+Note: This variable can also be set on a per-buffer basis using `setq-local`, or project-wide in `dir-locals.el`.