get new :bundle target working

src/figwheel/main.cljc

@@ -718,6 +718,9 @@ classpath. Classpath-relative paths have prefix of @ or @/")
 ;; Config
 ;; ----------------------------------------------------------------------------
 
+     (defn browser-target? [target]
+       (or (nil? target)
+           (= :bundle target)))
 
      (defn default-output-dir* [target & [scope]]
        (->> (cond-> [(or target default-target-dir) "public" "cljs-out"]
@@ -1157,7 +1160,7 @@ classpath. Classpath-relative paths have prefix of @ or @/")
 
      (defn config-cljs-devtools [{:keys [::config options] :as cfg}]
        (if (and
-            (nil? (:target options))
+            (browser-target? (:target options))
             (= :none (:optimizations options :none))
             (:cljs-devtools config true)
             (try (bapi/ns->location 'devtools.preload) (catch Throwable t false)))
@@ -1267,7 +1270,7 @@ classpath. Classpath-relative paths have prefix of @ or @/")
      (defn- config-warn-resource-directory-not-on-classpath [{:keys [::config options] :as cfg}]
   ;; this could check for other directories than resources
   ;; but this is mainly to help newcomers
-       (when (and (nil? (:target options))
+       (when (and (browser-target? (:target options))
                   (or (and (::build-once config)
                            (#{:serve} (:mode config)))
                       (#{:repl :serve} (:mode config)))
@@ -1710,11 +1713,11 @@ In the cljs.user ns, controls can be called without ns ie. (conns) instead of (f
          (background-build cfg build)))
 
      (defn validate-fix-target-classpath! [{:keys [::config ::build options]}]
-       (when (and (nil? (:target options))
-             ;; if build-once and not :serve -> don't validate fix classpath
+       (when (and (browser-target? (:target options))
+                  ;; if build-once and not :serve -> don't validate fix classpath
                   (not (and (::build-once config)
                             (not (= (:mode config) :serve)))))
-    ;; browsers need the target classpath to load files
+         ;; browsers need the target classpath to load files
          (when-not (contains? (:ring-stack-options config) :static)
            (when-let [output-to (:output-dir options (:output-to options))]
              (when-not (.isAbsolute (io/file output-to))

src/figwheel/main/schema/cljs_options.clj

@@ -161,15 +161,23 @@ human-readable manner. Defaults to true.
 
   :pretty-print false")
 
-(s/def ::target                    #{:nodejs :webworker})
+(s/def ::target                    #{:nodejs :webworker :bundle})
 (def-spec-meta ::target
   :doc
-  "If targeting nodejs add this line. Takes no other options at the
-moment. The default (no :target specified) implies browsers are being
-targeted. Have a look here for more information on how to run your
-code in nodejs.
+  "Valid options are :nodejs, :webworker and :bundle.
 
-  :target :nodejs")
+The default (no :target specified) implies browsers are being
+targeted.
+
+:webworker produces a bootstrap script suitable for loading with Web
+Workers.
+
+The :bundle target is to support dependencies in node_modules. The
+output generated by ClojureScript will need to be passed on to some
+other JavaScript tool (i.e. Webpack, Metro) that can handle the
+Node.js style require imports generated for these dependencies.
+
+  :target :bundle")
 
 (s/def ::infer-externs boolean?)
 (def-spec-meta ::infer-externs