var semverCompare = require('semver-compare')

module.exports = function pleaseUpgradeNode(pkg, opts) {

var opts = opts || {}

var requiredVersion = pkg.engines.node.replace('>=', '')

var currentVersion = process.version.replace('v', '')

if (semverCompare(currentVersion, requiredVersion) === -1) {

if (opts.message) {

console.error(opts.message(requiredVersion))

} else {

console.error(

pkg.name +

' requires at least version ' +

requiredVersion +

' of Node, please upgrade'

)

}

if (opts.hasOwnProperty('exitCode')) {

process.exit(opts.exitCode)

} else {

process.exit(1)

}

}

}