clojure - 为什么使用 lein run 按 ENTER 键后 read-line 不返回(看起来像是挂起)，但使用 lein repl 却可以？

Question

当前的问题是，当我使用 lein run 运行程序时，它会到达 (read-line) 部分，而我无法摆脱它，意思是:读取行永远不会返回。

相关代码如下:

(def command (atom ""))

(defn print-prompt []
  (print "prompt> ")
  (flush)
)

(defn ask-for-input []
    (print-prompt)
    (let [x (str (read-line))]
      (println (str "User input: " x))
      (reset! command x)
    )
)

我从未在屏幕上看到“用户输入:”字符串。奇怪的是，如果我运行 lein repl 并调用 (ask-for-input) 则它可以正常工作:S

Answer 1

尝试lein蹦床跑，它有效。

以下内容来自 leiningen 常见问题解答:

Q: I don't have access to stdin inside my project.

A: This is a limitation of the JVM's process-handling methods; none of them expose stdin correctly. This means that functions like read-line will not work as expected in most contexts, though the repl task necessarily includes a workaround. You can also use the trampoline task to launch your project's JVM after Leiningen's has exited rather than launching it as a subprocess.