import Logger from './logger'; import { exec } from 'shelljs'; export default class DependencyChecker { logger: Logger; constructor() { this.logger = new Logger('Deps'); } checkAll(): void { this.logger.info('Checking started'); this.check('Node.js', 'node -v', x => x.match(/^v(.*)\r?\n$/)); this.check('npm', 'npm -v', x => x.match(/^(.*)\r?\n$/)); this.check('MongoDB', 'mongo --version', x => x.match(/^MongoDB shell version: (.*)\r?\n$/)); this.check('Redis', 'redis-server --version', x => x.match(/v=([0-9\.]*)/)); this.logger.info('Checking finished'); } check(serviceName: string, command: string, transform: (x: string) => RegExpMatchArray): void { const code = { success: 0, notFound: 127 }; const x = exec(command, { silent: true }) as any; if (x.code === code.success) { let ver = transform(x.stdout); if (ver != null) { this.logger.info(`${serviceName} ${ver[1]} found`); } else { this.logger.warn(`${serviceName} not found`); this.logger.warn(`Regexp used for version check of ${serviceName} is probably messed up`); } } else if (x.code === code.notFound) { this.logger.warn(`${serviceName} not found`); } } }