Don't recursively prep project.

leiningen-core/src/leiningen/core/eval.clj

@@ -55,17 +55,11 @@
   (if-not (:disable-injection project)
     (conj (:injections project) hooke-injection)))
 
-(def ^:dynamic *prepping?* false)
-
-;; TODO: tasks which are in :prep-tasks should dissoc themselves
-;; before calling eval-in-project!
 (defn prep [project]
   ;; This must exist before the project is launched.
   (.mkdirs (io/file (:compile-path project "/tmp")))
-  (when-not *prepping?*
-    (binding [*prepping?* true]
   (doseq [task (:prep-tasks project)]
-        (main/apply-task task project [])))))
+    (main/apply-task task (dissoc project :prep-tasks) [])))
 
 ;; # Subprocess stuff
 

src/leiningen/compile.clj

@@ -126,7 +126,9 @@ as command-line arguments."
          (try
            (let [form `(doseq [namespace# '~namespaces]
                          (println "Compiling" namespace#)
-                         (clojure.core/compile namespace#))]
+                         (clojure.core/compile namespace#))
+                 project (update-in project [:prep-tasks]
+                                    (partial remove #{"compile"}))]
              (.mkdirs (io/file (:compile-path project)))
              ;; TODO: should eval-in-project be allowed to return non-integers?
              (if (zero? (eval/eval-in-project project form))