shared-logs / web-app

'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(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()

  }

}