From a974892eaefde3b24d397b23e3f6dea29a43aaf1 Mon Sep 17 00:00:00 2001
From: Remy Sharp <remy@remysharp.com>
Date: Tue, 10 Jul 2018 18:41:45 +0100
Subject: [PATCH] feat: support ctrl+l to clear

And refactor the stdin handling
---
 lib/nodemon.js | 57 +++++++++++++++++++++++++++++---------------------
 1 file changed, 33 insertions(+), 24 deletions(-)

diff --git a/lib/nodemon.js b/lib/nodemon.js
index 13961b8b..836e387b 100644
--- a/lib/nodemon.js
+++ b/lib/nodemon.js
@@ -96,44 +96,53 @@ function nodemon(settings) {
     });
 
     // echo out notices about running state
-    if (config.options.stdin && config.options.restartable) {
-      // allow nodemon to restart when the use types 'rs\n'
-      process.stdin.resume();
-      process.stdin.setEncoding('utf8');
-      process.stdin.on('data', function (data) {
-        data = (data + '').trim().toLowerCase();
-
-        // if the keys entered match the restartable value, then restart!
-        if (data === config.options.restartable) {
-          bus.emit('restart');
-        }
-      });
-    } else if (config.options.stdin) {
-      // if 'restartable' is disabled (via a nodemon.json)
-      // then it's possible we're being used with a REPL
+    if (config.options.stdin) {
       // so let's make sure we don't eat the key presses
       // but also, since we're wrapping, watch out for
-      // special keys, like ctrl+c x 2 or '.exit' or ctrl+d
+      // special keys, like ctrl+c x 2 or '.exit' or ctrl+d or ctrl+l
       var ctrlC = false;
       var buffer = '';
+      const rs = config.options.restartable;
 
+      process.stdin.setEncoding('utf8');
       process.stdin.on('data', function (data) {
-        buffer += data;
         data = data.toString();
-        var chr = data.charCodeAt(0);
+        buffer += data;
+        const chr = data.charCodeAt(0);
+
+        // if restartable, echo back
+        if (rs) {
+          if (chr === 13) {
+            process.stdout.write('\n');
+          }
+          // this prevents cursor keys from working.
+          process.stdout.write(String.fromCharCode(chr));
+        }
+
         if (chr === 3) {
-          if (ctrlC) {
-            process.exit();
+          // if restartable, assume ctrl+c will break immediately
+          if (ctrlC || rs) {
+            process.exit(rs ? 1 : 0);
           }
           ctrlC = true;
-        } else if (buffer === '.exit' || chr === 4) {
+          return;
+        } else if (buffer === '.exit' || chr === 4) { // ctrl+d
           process.exit();
-        } else if (ctrlC || chr === 10) {
-          ctrlC = false;
+        } else if (chr === 13 || chr === 10) { // enter / carriage return
+          const input = buffer.toString().trim().toLowerCase();
+          if (input === rs) {
+            bus.emit('restart');
+          }
+          buffer = '';
+        } else if (chr === 12) { // ctrl+l
+          console.clear();
           buffer = '';
         }
+        ctrlC = false;
       });
-      process.stdin.setRawMode(true);
+      if (process.stdin.setRawMode) {
+        process.stdin.setRawMode(true);
+      }
     }
 
     if (config.options.restartable) {