Parse required clojure version out of project.clj to avoid duplication.

project.clj

@@ -1,4 +1,4 @@
-(defproject functional-koans "0.1.0"
+(defproject functional-koans "0.2.0"
   :description "The functional koans"
   :dependencies [[org.clojure/clojure "1.3.0-alpha3"]
                  [jline "0.9.94"]])

src/path_to_enlightenment.clj

@@ -1,6 +1,7 @@
 (ns path-to-enlightenment
   (:use [clojure.test])
-  (:require [clojure.set]))
+  (:require [clojure.set]
+            [clojure.string]))
 
 (def __ nil)
 (def ___ (fn [& args] nil))
@@ -37,7 +38,20 @@
       (throw (Exception. (str "Clojure version " required-major "."
                               required-minor " or higher required."))))))
 
+(defn parse-required-version []
+  (let [rdr (clojure.lang.LineNumberingPushbackReader.
+              (java.io.FileReader. (java.io.File. "project.clj")))
+        project-form (read rdr)
+        version-string (->> project-form
+                            (drop 3)
+                            (apply hash-map)
+                            :dependencies
+                            (into {})
+                            ('org.clojure/clojure))]
+    (map read-string
+         (take 3 (clojure.string/split version-string #"[\.\-]")))))
+
 (defn run []
-  (require-version [1 3])
+  (require-version (parse-required-version))
   (apply load (doall (map (partial str "koans/") ordered-koans)))
   (println "You have achieved clojure enlightenment. Namaste."))