Run npm install in all packages defined by lerna.json

bootstrap.js

// Assume this file is next to lerna.json
// Otherwise the path to lerna.json needs to be updated (line 9)
// Credits: http://2ality.com/2018/05/child-process-streams.html

const fs = require('fs')
const path = require('path')
const glob = require('glob')
const { spawn } = require('child_process')

/*** Step 1. Get lerna.json config ***/
const lernaConfig = JSON.parse(fs.readFileSync(path.resolve(__dirname, '../lerna.json')))

/*** Step 2. Run npm install over all packages in order ***/
async function runChildProcess(childProcess) {
  return new Promise((resolve, reject) => {
    childProcess.once('exit', (code) => {
      if (code === 0) {
        resolve();
      } else {
        reject(new Error(`Exit with error code: ${code}`));
      }
    })

    childProcess.once('error', (err) => {
      reject(err);
    })
  })
}

let activeChildProcess
async function main() {
  for (const pkgGlob of lernaConfig.packages) {
    const pkgDirs = glob.sync(pkgGlob)
    
    for (const pkgDir of pkgDirs) {
      console.info(`Start installing package under ${pkgDir} ...`)
      activeChildProcess = spawn(`npm install -C ${pkgDir}`, {
        stdio: 'inherit',
        shell: true
      })
      await runChildProcess(activeChildProcess);
    }
  }

  activeChildProcess = null
}

main()

/*** Step 3. Attach main process listener ***/
process.on('SIGINT', () => {
  // ctrl+c event
  process.exit(1)
})
.on('exit', () => {
  if (activeChildProcess) {
    console.info('Stop active child processes...')
    activeChildProcess.kill()
  }
})