is-iojs/index.js

is-iojs determines if runtime is io.js.

'use strict';

var execSync = require('child_process').execSync;

module.exports = (function () {
  if (!execSync) {
    return false;
  }
  /**
   * @TODO: Make some reliable test for v1.0.0 and v1.0.1 versions
   */
  if (~[ 'v1.0.0', 'v1.0.1' ].indexOf(process.version)) {
    return true;
  }

  return /iojs\.org/.test(execSync('"' + process.execPath + '" -h', { encoding: 'ascii' }));
})();