text: 'use strict'
  const chalk = require('chalk')
  const semver = require('semver')
  const packageConfig = require('../package.json')
  const shell = require('shelljs')
  
  function exec(cmd) {
  	return require('child_process').execSync(cmd).toString().trim()
  }
  
  const 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 () {
  	const warnings = []
  
  	for (let i = 0; i < versionRequirements.length; i++) {
  		const 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 (let i = 0; i < warnings.length; i++) {
  			const warning = warnings[i]
  			console.log('  ' + warning)
  		}
  
  		console.log()
  		process.exit(1)
  	}
  }
  