A node module whose exports can optionally be made global

optionally_global.js

/*

This module can be required normally:
  var optionally_global = require('./optionally_global');
  console.log(optionally_global.bar());

Or its exports can be made global:
  require('./optionally_global').global();
  console.log(bar());

*/

exports.foo = 'foo';
exports.bar = function() {
  return 'bar';
}

exports.global = function() {
  for (var cmd in exports) {
    if (cmd !== 'global') {
      if (!global[cmd]) {
        global[cmd] = exports[cmd];
      } else {
        console.warn('Global function "' + cmd + '" already defined');
      }
    }
  }
};