default eval from node core

default_eval.js

var repl = require('repl');
var debug = require('debuglog');
var vm = require('vm');

// copy pasta from node source
// lib/repl.js
function defaultEval(code, context, file, cb) {
    var err, result;
    // first, create the Script object to check the syntax
    try {
      var script = vm.createScript(code, {
        filename: file,
        displayErrors: false
      });
    } catch (e) {
      err = e;
      debug('parse error %j', code, e);
    }

    if (!err) {
      try {
        if (this.useGlobal) {
          result = script.runInThisContext({ displayErrors: false });
        } else {
          result = script.runInContext(context, { displayErrors: false });
        }
      } catch (e) {
        err = e;
        if (err && process.domain) {
          debug('not recoverable, send to domain');
          process.domain.emit('error', err);
          process.domain.exit();
          return;
        }
      }
    }

    cb(err, result);
  }