Fix things so Buck doesn't get added to every target

Oops.

Rakefile

@@ -14,9 +14,6 @@ Rake.application.instance_variable_set "@name", "go"
 orig_verbose = verbose
 verbose(false)
 
-# Buck integration
-require 'rake-tasks/buck'
-
 # The CrazyFun build grammar. There's no magic here, just ruby
 require 'rake-tasks/crazy_fun'
 require 'rake-tasks/crazy_fun/mappings/export'
@@ -102,6 +99,11 @@ end
 # from rake.
 crazy_fun.create_tasks(Dir["**/build.desc"])
 
+# Buck integration. Loaded after CrazyFun has initialized all the tasks it'll handle.
+# This is because the buck integration creates a rule for "//.*"
+require 'rake-tasks/buck'
+
+
 # Notice that because we're using rake, anything you can do in a normal rake
 # build can also be done here. For example, here we set the default task
 task :default => [:test]

rake-tasks/buck.rb

@@ -96,11 +96,15 @@ def buck(*args, &block)
 end
 
 rule /\/\/.*/ do |task|
-  # Task is a FileTask, but that's not what we need. Instead, just delegate down to buck in all cases
+  # Task is a FileTask, but that's not what we need. Instead, just delegate down to buck in all
+  # cases where the rule was not created by CrazyFun. Rules created by the "rule" method will
+  # be a FileTask, whereas those created by CrazyFun are normal rake Tasks.
 
-  task.enhance do
-    Buck::buck_cmd.call('build', task.name)
-  end
+  if task.class == Rake::FileTask && !task.out
+    task.enhance do
+      Buck::buck_cmd.call('build', task.name)
+    end
 
-  Buck::enhance_task(task)
+    Buck::enhance_task(task)
+  end
 end