Hammerspoon fennel REPL

init.fnl

(local fennel (require :fennel))

(require :hs.ipc)
(let [coro (coroutine.create fennel.repl)]
  (coroutine.resume coro {:readChunk (fn []
                                       (let [input (coroutine.yield)]
                                         (.. input "\n")))
                          :onValues (fn [xs]
                                      (print (table.concat xs "\t")))
                          :onError (fn [_ msg]
                                     (print msg))})
  (set hs._consoleInputPreparser (fn [s]
                                   (coroutine.resume coro s)
                                   "")))