added github pages support

docs/js/out/devtools/prefs.cljs

@@ -0,0 +1,34 @@
+(ns devtools.prefs
+  (:require-macros [devtools.prefs :refer [emit-external-config emit-env-config]])
+  (:require [devtools.defaults :as defaults]))
+
+; we use delay for DCE, see https://github.com/binaryage/cljs-devtools/issues/37
+(def default-config (delay @defaults/config))
+(def external-config (delay (emit-external-config)))
+(def env-config (delay (emit-env-config)))
+(def initial-config (delay (merge @default-config @external-config @env-config)))
+
+(def ^:dynamic *current-config* (delay @initial-config))
+
+; -- public api -------------------------------------------------------------------------------------------------------------
+
+(defn set-prefs! [new-prefs]
+  (set! *current-config* new-prefs))
+
+(defn get-prefs []
+  (when (delay? *current-config*)
+    (set-prefs! @*current-config*))
+  *current-config*)
+
+(defn pref [key]
+  (key (get-prefs)))
+
+(defn set-pref! [key val]
+  (set-prefs! (assoc (get-prefs) key val)))
+
+(defn merge-prefs! [m]
+  (set-prefs! (merge (get-prefs) m)))
+
+(defn update-pref! [key f & args]
+  (let [new-val (apply f (pref key) args)]
+    (set-pref! key new-val)))