dd-trace/scripts/preinstall.js

Datadog APM tracing client for JavaScript

'use strict'

/* eslint-disable no-console */

const npmArgv = (() => {
  try {
    return JSON.parse(process.env.npm_config_argv)
  } catch (e) {
    return { original: [] }
  }
})()

const path = require('path')
const requirePackageJson = require('../packages/dd-trace/src/require-package-json.js')

const nodeMajor = Number(process.versions.node.split('.')[0])

const min = Number(requirePackageJson(path.join(__dirname, '..')).engines.node.match(/\d+/)[0])

// Most package managers don't support `npm_config_argv`, so we need a custom
// flag to allow installing dd-trace on unsupported engines.
const hasIgnoreEngines = process.env._DD_IGNORE_ENGINES === 'true' || npmArgv &&
  npmArgv.original &&
  npmArgv.original.includes('--ignore-engines')

if (nodeMajor < min && !hasIgnoreEngines) {
  process.exitCode = 1
  console.error('\n' + `
You're using Node.js v${process.versions.node}, which is not supported by
dd-trace.

Please upgrade to a more recent version of Node.js.
  `.trim() + '\n')
}