monorepo-run/src/util/env.js

Run scripts in monorepo with colors, streaming and separated panes

const { execSync } = require('child_process')

let _hasYarn

exports.hasYarn = () => {
  if (_hasYarn != null) {
    return _hasYarn
  }
  try {
    execSync('yarn --version', { stdio: 'ignore' })
    return (_hasYarn = true)
  } catch (e) {
    return (_hasYarn = false)
  }
}