lib: repl for #14022 && readline fix debug warning

lib/readline.js

@@ -28,7 +28,8 @@
 'use strict';
 
 const errors = require('internal/errors');
-const { debug, inherits } = require('util');
+const { debuglog, inherits } = require('util');
+const debug = debuglog('readline');
 const { Buffer } = require('buffer');
 const EventEmitter = require('events');
 const { StringDecoder } = require('string_decoder');

lib/repl.js

@@ -1267,6 +1267,34 @@ function defineDefaultCommands(repl) {
         '// Entering editor mode (^D to finish, ^C to cancel)\n');
     }
   });
+
+  repl.defineCommand('load-editor', {
+    help: 'Enter load and editor mode',
+    action: function(file) {
+      if (!this.terminal) return;
+      REPLServer.super_.prototype.setPrompt.call(this, '');
+      this.write('// Entering editor mode (^D to finish, ^C to cancel)\n');
+      try {
+        var stats = fs.statSync(file);
+        if (stats && stats.isFile()) {
+          var data = fs.readFileSync(file, 'utf8');
+          var lines = data.split('\n');
+          this.displayPrompt();
+          for (var n = 0; n < lines.length; n++) {
+            if (lines[n])
+              this.write(`${lines[n]}\n`);
+          }
+          this.editorMode = true;
+        } else {
+          this.outputStream.write('Failed to load:' + file +
+            ' is not a valid file\n');
+        }
+      } catch (e) {
+        this.outputStream.write('Failed to load:' + file + '\n');
+      }
+      this.displayPrompt();
+    }
+  });
 }
 
 function regexpEscape(s) {

test/parallel/test-repl-definecommand.js

@@ -34,8 +34,9 @@ r.defineCommand('say2', function() {
   this.displayPrompt();
 });
 
+
 inputStream.write('.help\n');
-assert(/\n\.say1     help for say1\n/.test(output),
+assert(/\n\.say1          help for say1\n/.test(output),
        'help for say1 not present');
 assert(/\n\.say2\n/.test(output), 'help for say2 not present');
 inputStream.write('.say1 node developer\n');