Provide dynamic cljs completions with suitable (#633)

CHANGELOG.md

@@ -7,6 +7,7 @@
 * [#605](https://github.com/clojure-emacs/cider-nrepl/pull/605): Added a option for filtering vars to the ns-vars middleware.
 * Added `xref` middleware providing `fn-deps` and `fn-refs` ops.
 * [#628](https://github.com/clojure-emacs/cider-nrepl/pull/628): Added `clojuredocs` middleware providing `clojuredocs-lookup` and `clojuredocs-refresh-cache` ops.
+* [#633](https://github.com/clojure-emacs/cider-nrepl/pull/633) Added runtime code completion for ClojureScript via [suitable](https://github.com/rksm/clj-suitable).
 
 ### Bugs fixed
 

README.md

@@ -389,6 +389,7 @@ Let's also acknowledge some of the projects leveraged by cider-nrepl:
 * [orchard][] - extracted from `cider-nrepl`, so that non-nREPL clients can leverage the generic tooling functionality (like `inspect`, `apropos`, `var-info`, etc
 * [compliment][] - for Clojure code completion
 * [cljs-tooling][] - for ClojureScript code completion
+* [suitable][] - for ClojureScript code completion using runtime inspection
 * [tools.trace][] - for tracing
 * [tools.namespace][] - for namespace reloading
 * [cljfmt][] - for code formatting
@@ -402,6 +403,7 @@ Distributed under the Eclipse Public License, the same as Clojure.
 [orchard]: https://github.com/clojure-emacs/orchard
 [compliment]: https://github.com/alexander-yakushev/compliment
 [cljs-tooling]: https://github.com/clojure-emacs/cljs-tooling
+[suitable]: https://github.com/rksm/clj-suitable
 [tools.trace]: https://github.com/clojure/tools.trace
 [tools.namespace]: https://github.com/clojure/tools.namespace
 [cljfmt]: https://github.com/weavejester/cljfmt

project.clj

@@ -11,6 +11,7 @@
                  ^:inline-dep [fipp "0.6.18"] ; can be removed in unresolved-tree mode
                  ^:inline-dep [compliment "0.3.9"]
                  ^:inline-dep [cljs-tooling "0.3.1"]
+                 ^:inline-dep [org.rksm/suitable "0.2.1" :exclusions [org.clojure/clojurescript]]
                  ^:inline-dep [cljfmt "0.6.4" :exclusions [org.clojure/clojurescript]]
                  ^:inline-dep [org.clojure/tools.namespace "0.3.1"]
                  ^:inline-dep [org.clojure/tools.trace "0.7.10"]

src/cider/nrepl/middleware/complete.clj

@@ -5,16 +5,22 @@
    [cljs-tooling.complete :as cljs-complete]
    [compliment.core :as jvm-complete]
    [compliment.utils :as jvm-complete-utils]
-   [orchard.misc :as u]))
+   [orchard.misc :as u]
+   [suitable.complete-for-nrepl :as suitable]))
+
+(defn- cljs-complete
+  [msg cljs-env ns prefix extra-metadata]
+  (concat (cljs-complete/completions cljs-env prefix {:context-ns ns
+                                                      :extra-metadata extra-metadata})
+          (suitable/complete-for-nrepl msg)))
 
 (defn complete
   [{:keys [ns symbol context extra-metadata] :as msg}]
   (let [ns (u/as-sym ns)
         prefix (str symbol)
         extra-metadata (set (map keyword extra-metadata))]
     (if-let [cljs-env (cljs/grab-cljs-env msg)]
-      (cljs-complete/completions cljs-env prefix {:context-ns ns
-                                                  :extra-metadata extra-metadata})
+      (cljs-complete msg cljs-env ns prefix extra-metadata)
       (jvm-complete/completions prefix {:ns ns
                                         :context context
                                         :extra-metadata extra-metadata}))))

test/cljs/cider/nrepl/middleware/cljs_complete_test.clj

@@ -40,6 +40,26 @@
       (is (= '("[psym & doc+methods]") (:arglists candidate)))
       (is (string? (:doc candidate))))))
 
+(deftest cljs-complete-with-suitable-test
+  (testing "js global completion"
+    (let [response (session/message {:op "complete"
+                                     :ns "cljs.user"
+                                     :symbol "js/Ob"})
+          candidates (:completions response)]
+      (is (= [{:candidate "js/Object", :ns "js", :type "function"}] candidates))))
+
+  (testing "manages context state"
+    (session/message {:op "complete"
+                      :ns "cljs.user"
+                      :symbol ".xxxx"
+                      :context "(__prefix__ js/Object)"})
+    (let [response (session/message {:op "complete"
+                                     :ns "cljs.user"
+                                     :symbol ".key"
+                                     :context ":same"})
+          candidates (:completions response)]
+      (is (= [{:ns "js/Object", :candidate ".keys" :type "function"}] candidates)))))
+
 (deftest cljs-complete-doc-test
   (let [response (session/message {:op "complete-doc" :symbol "tru"})]
     (is (= (:status response) #{"done"}))