text: var chalk = require('chalk')
  var semver = require('semver')
  var packageConfig = require('../package.json')
  var shell = require('shelljs')
  function exec (cmd) {
      return require('child_process').execSync(cmd).toString().trim()
  }
  
  var versionRequirements = [
      {
          name: 'node',
          currentVersion: semver.clean(process.version),
          versionRequirement: packageConfig.engines.node
      },
  ]
  
  if (shell.which('npm')) {
      versionRequirements.push({
          name: 'npm',
          currentVersion: exec('npm --version'),
          versionRequirement: packageConfig.engines.npm
      })
  }
  
  module.exports = function () {
      var warnings = []
      for (var i = 0; i < versionRequirements.length; i++) {
          var mod = versionRequirements[i]
          if (!semver.satisfies(mod.currentVersion, mod.versionRequirement)) {
              warnings.push(mod.name + ': ' +
                  chalk.red(mod.currentVersion) + ' should be ' +
                  chalk.green(mod.versionRequirement)
              )
          }
      }
  
      if (warnings.length) {
          console.log('')
          console.log(chalk.yellow('To use this template, you must update following to modules:'))
          console.log()
          for (var i = 0; i < warnings.length; i++) {
              var warning = warnings[i]
              console.log('  ' + warning)
          }
          console.log()
          process.exit(1)
      }
  }
  