@netlify/framework-info/src/run_script.js

Framework detection utility

const { dirname } = require('path')

// Retrieve the command to run `package.json` `scripts` commands
const getRunScriptCommand = async function ({ pathExists, packageJsonPath }) {
  const yarnExists = await pathExists(`${dirname(packageJsonPath)}/yarn.lock`)
  if (yarnExists) {
    return 'yarn'
  }

  return 'npm run'
}

module.exports = { getRunScriptCommand }