brain-vue-cli/build/check-versions.js

A command line tool used to run projects

var chalk = require('chalk');
var semver = require('semver');
var packageConfig = require('../package.json');
var shell = require('shelljs');
function exec(cmd) {
    return require('child_process').execSync(cmd).toString().trim();
}
var 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 () {
    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);
    }
};