hello.cljs

(ns hello
  (:require [cljs.nodejs :as nodejs]
            [foo :as foo]))

;;(def foo (.-foo (nodejs/require "./foo")))

(defn ^:export greet [n]
  ;;(str "Hello, " (.title foo n)))
  (str "Hello, " (foo/title n)))


;; ------- foo.cljs -------
;; foo.cljs is in the same directory as hello.cljs

(ns foo)

(defn ^:export title [n]
  (str "Mr. " n))

I'm getting the following error when I invoke greet as defined in hello.cljs (which has been compiled with simple optimizations):

May 5, 2012 7:52:43 PM com.google.javascript.jscomp.LoggerErrorManager println
SEVERE: hello:5: ERROR - required "foo" namespace never provided
goog.require('foo');
^

May 5, 2012 7:52:44 PM com.google.javascript.jscomp.LoggerErrorManager printSummary
WARNING: 1 error(s), 0 warning(s)
ERROR: JSC_MISSING_PROVIDE_ERROR. required "foo" namespace never provided at hello line 5 : 0
Cannot call method 'greet' of undefined

simply needed to push process.cwd() onto the classpath from the nodejs side of things...