quasar-cli/lib/helpers/node-packager.js

Quasar Framework CLI

const fs = require('fs')

const
  appPaths = require('../app-paths'),
  spawn = require('cross-spawn').sync,
  warn = require('./logger')('app:node-packager', 'red')

function isInstalled (cmd) {
  try {
    return spawn(cmd, ['--version']).status === 0
  }
  catch (err) {
    return false
  }
}

function getPackager () {
  if (!fs.existsSync(appPaths.resolve.app('node_modules'))) {
    warn('⚠️  Please run "yarn" / "npm install" first')
    warn()
    process.exit(1)
  }

  if (fs.existsSync(appPaths.resolve.app('yarn.lock'))) {
    return 'yarn'
  }

  if (fs.existsSync(appPaths.resolve.app('package-lock.json'))) {
    return 'npm'
  }

  if (isInstalled('yarn')) {
    return 'yarn'
  }

  if (isInstalled('npm')) {
    return 'npm'
  }

  warn('⚠️  Please install Yarn or NPM before running this command.')
  warn()
}

module.exports = getPackager()