增加转格式

lib/keyboard.js

@@ -16,3 +16,22 @@ export function initKeypress() {
 export function onKey(handler) {
   process.stdin.on("keypress", handler);
 }
+
+export function stopKeypress() {
+  process.stdin.removeAllListeners("keypress");
+  if (process.stdin.isTTY) {
+    process.stdin.setRawMode(false);
+  }
+}
+
+export function waitForKey(message = "按任意键返回...") {
+  return new Promise(resolve => {
+    console.log("\n" + message);
+    initKeypress();
+    const handler = () => {
+      stopKeypress();
+      resolve();
+    };
+    process.stdin.once("keypress", handler);
+  });
+}