text: var chalk = require('chalk')
  var semver = require('semver')
  var packageConfig = require('../package.json')
  function exec (cmd) {
    try {
      return require('child_process').execSync(cmd).toString().trim()
    } catch (e) {
      return ""
    }
  }
  
  var versionRequirements = [
    {
      name: 'node',
      currentVersion: semver.clean(process.version),
      versionRequirement: packageConfig.engines.node
    }
  ]
  
  if (exec('which npm').length > 0) {
    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)
    }
  }
  