jshmrtn/generator-jm-vuejs

#!/usr/bin/env node

/* eslint-disable no-console */
'use strict';

const
      chalk = require('chalk'),
      semver = require('semver'),
      packageConfig = require('../package.json'),
      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 index = 0; index < versionRequirements.length; index++) {
    const mod = versionRequirements[index];

    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 index = 0; index < warnings.length; index++) {
      const warning = warnings[index];

      console.log('  ' + warning);
    }
    console.log();
    process.exit(1);
  }
};