Use fireplace from tpope. All you need to do is go to your project dir and run lein repl, then when you're in vim it will automatically connect to the repl and

Use fireplace from tpope. All you need to do is go to your project dir and run lein repl, then when you're in vim it will automatically connect to the repl and you can do stuff like :%Eval to eval the file, or cpp to eval the expression under your cursor. See the github and :help fireplace for more.