always generate a namespace, fix tests so that we supply a main to

elide other sources from the build.

Author: swannodette

script/test

@@ -13,6 +13,7 @@ possible=5
 ran=0
 
 if ! bin/cljsc src/test/cljs "{:optimizations :advanced
+                               :main test-runner
                                :output-wrapper true
                                :verbose true
                                :compiler-stats true

src/main/clojure/cljs/analyzer.cljc

@@ -3819,7 +3819,11 @@
                     (finally
                       (when rdr
                         (.close ^Reader rdr))))))]
-          ijs)))))
+          (cond-> ijs
+            (not (contains? ijs :ns))
+            (merge
+              {:ns (gen-user-ns src)
+               :provides [(gen-user-ns src)]})))))))
 
 #?(:clj
    (defn- cache-analysis-ext

src/main/clojure/cljs/compiler.cljc

@@ -1457,10 +1457,10 @@
           (fn []
             (when (and (or ana/*verbose* (:verbose opts))
                        (not (:compiler-stats opts)))
-              (util/debug-prn "Compiling" (str src)))
+              (util/debug-prn "Compiling" (str src) "to" (str dest)))
             (util/measure (and (or ana/*verbose* (:verbose opts))
                                (:compiler-stats opts))
-              (str "Compiling " src)
+              (str "Compiling " (str src) " to " (str dest))
               (let [ext (util/ext src)
                    {:keys [ns] :as ns-info} (ana/parse-ns src)]
                (if-let [cached (cached-core ns ext opts)]