Function defineDefaultCommands

lib/repl.js:1348–1463

(repl)

}

function defineDefaultCommands(repl) {
  repl.defineCommand('break', {
    help: 'Sometimes you get stuck, this gets you out',
    action: function() {
      this.clearBufferedCommand();
      this.displayPrompt();
    },
  });

  let clearMessage;
  if (repl.useGlobal) {
    clearMessage = 'Alias for .break';
  } else {
    clearMessage = 'Break, and also clear the local context';
  }
  repl.defineCommand('clear', {
    help: clearMessage,
    action: function() {
      this.clearBufferedCommand();
      if (!this.useGlobal) {
        this.output.write('Clearing context...\n');
        this.resetContext();
      }
      this.displayPrompt();
    },
  });

  repl.defineCommand('exit', {
    help: 'Exit the REPL',
    action: function() {
      this.close();
    },
  });

  repl.defineCommand('help', {
    help: 'Print this help message',
    action: function() {
      const names = ArrayPrototypeSort(ObjectKeys(this.commands));
      const longestNameLength = MathMaxApply(
        ArrayPrototypeMap(names, (name) => name.length),
      );
      ArrayPrototypeForEach(names, (name) => {
        const cmd = this.commands[name];
        const spaces =
          StringPrototypeRepeat(' ', longestNameLength - name.length + 3);
        const line = `.${name}${cmd.help ? spaces + cmd.help : ''}\n`;
        this.output.write(line);
      });
      this.output.write('\nPress Ctrl+C to abort current expression, ' +
        'Ctrl+D to exit the REPL\n');
      this.displayPrompt();
    },
  });

  repl.defineCommand('save', {
    help: 'Save all evaluated commands in this REPL session to a file',
    action: function(file) {
      try {