Allow :jvm-opts to be set in project.clj.

Note: this forces the project to run in a forked JVM, which increases
startup time. Use sparingly.

README.md

@@ -86,6 +86,9 @@ Other keys accepted:
   Specify this as a map of repo IDs to URLs.
 * :source-path, :compile-path, :library-path, :test-path, :resources-path -
   alternate paths for src/, classes/, lib/, resources/, and test/ directories.
+* :jvm-opts - a list of arguments to pass to the project-level JVM
+
+TODO: spin this list off into its own file and explain each option better
 
 ## FAQ
 

src/leiningen/compile.clj

@@ -78,11 +78,9 @@
       nil)))
 
 (defn get-jvm-args
-  "Returns a seq of strings with the arguments sent to this jvm instance."
-  []
-  (-> (ManagementFactory/getRuntimeMXBean)
-      (.getInputArguments)
-      (seq)))
+  [project]
+  (concat (.getInputArguments (ManagementFactory/getRuntimeMXBean))
+          (:jvm-opts project)))
 
 (defn eval-in-project
   "Executes form in an isolated classloader with the classpath and compile path
@@ -107,9 +105,10 @@
                                           :default native-path)))))
     (.setClasspath java (apply make-path (get-classpath project)))
     (.setFailonerror java true)
-    (when (or (:fork project) (= :macosx (get-os)) native-path)
+    (when (or (:fork project) (:jvm-opts project)
+              (= :macosx (get-os)) native-path)
       (.setFork java true)
-      (doseq [arg (get-jvm-args)]
+      (doseq [arg (get-jvm-args project)]
         (when-not (re-matches #"^-Xbootclasspath.+" arg)
           (.setValue (.createJvmarg java) arg))))
     (.setClassname java "clojure.main")

todo.org

@@ -20,6 +20,7 @@ Leiningen TODOs
 * For 1.2.0
 ** DONE make org.clojure implied for clojure/contrib deps
 ** DONE better way to force setFork in eval-in-project
+** TODO document all known project.clj keys
 ** TODO System/exit appropriately when testing based on pass/fail (abedra)
 *** Needs to set permissions with the ant API's Java task
 ** DONE rename :namespaces key in project.clj