CLJS-1156: load-file fails with :make-reader issue

relax namespace checking, if something loaded a namesapce it's ok to refer to it, fixes
interactions after load-file, no longer get false warnings

load-file needs to use *repl-opts* if opts not supplied, load-file need to analyze the
file in case it was already compiled.

Author: dnolen

src/clj/cljs/analyzer.clj

@@ -429,6 +429,8 @@
 (defn confirm-ns [env ns-sym]
   (when (and (nil? (get '#{cljs.core goog Math goog.string} ns-sym))
              (nil? (get (-> env :ns :requires) ns-sym))
+             ;; something else may have loaded the namespace, i.e. load-file
+             (nil? (get-in @env/*compiler* [::namespaces ns-sym]))
              ;; macros may refer to namespaces never explicitly required
              ;; confirm that the library at least exists
              (nil? (io/resource (util/ns->relpath ns-sym))))

src/clj/cljs/repl.clj

@@ -471,7 +471,7 @@
 ;; TODO: this should probably compile dependencies - David
 
 (defn load-file
-  ([repl-env f] (load-file repl-env f nil))
+  ([repl-env f] (load-file repl-env f *repl-opts*))
   ([repl-env f opts]
     (if (:output-dir opts)
       (let [src (cond
@@ -482,6 +482,10 @@
                        (assoc opts
                          :output-file
                          (cljsc/src-file->target-file src)))]
+        ;; make sure it's been analyzed, this is because if it's already compiled
+        ;; cljs.compiler/compile-file won't do anything, good for builds,
+        ;; but a bit annoying here
+        (ana/analyze-file src opts)
         (-evaluate repl-env f 1 (cljsc/add-dep-string opts compiled))
         (-evaluate repl-env f 1 (cljsc/src-file->goog-require src)))
       (binding [ana/*cljs-ns* 'cljs.user]