use-public.js

#!/usr/bin/env node
const pubreg = 'registry.npmjs.org'
const fs = require('fs')
const https = require('https')
const url = require('url')
const packageLock = process.argv[2] || './package-lock.json'

const lock = JSON.parse(fs.readFileSync(packageLock, 'utf8'))

const fix = lock => Promise.all(
  Object.keys(lock.dependencies || {}).map(pkg => new Promise(resolve => {
    if (lock.dependencies[pkg].resolved && url.parse(lock.dependencies[pkg].resolved).host !== pubreg) {
      https.request({
        method: 'HEAD',
        host: pubreg,
        path: '/' + pkg,
      }, res => {
        if (res.statusCode === 200) {
          console.error('fix', lock.dependencies[pkg].resolved)
          const fixed = url.format({
            ...(url.parse(lock.dependencies[pkg].resolved)),
            host: pubreg,
            hostname: pubreg,
          })
          lock.dependencies[pkg].resolved = fixed
          console.error('fixed', fixed, lock.dependencies[pkg].resolved)
          return fix(lock.dependencies[pkg]).then(resolve)
        }
        resolve()
      }).end()
    } else {
      resolve()
    }
  }))
)

const main = async () => {
  await fix(lock)
  console.error('write back')
  fs.writeFileSync(packageLock, JSON.stringify(lock, null, 2) + '\n')
}

main()