run "npm install" in all folders under a certain folder

install-all-components.js

var fs = require('fs');
var path = require('path');
var childProcess = require('child_process');

var dir = './components';
var nodeComand = 'npm install';
var packageFile = 'package.json';
var nodeVersion = process.versions.node.split('.');

if (!(nodeVersion[0] >= 0 && nodeVersion[1] >= 12 && nodeVersion[2] >= 4)) {
  console.error('This setup require node v0.12.4 or higher, you have: v' + nodeVersion.join('.'));
  process.exit(1);
}

var components = fs.readdirSync(dir);
components.forEach(function(component) {
  var componentPath = path.join(dir, component);
  var stats = fs.statSync(componentPath);
  if (stats && stats.isDirectory()) {
    var files = fs.readdirSync(componentPath);
    if (files.indexOf(packageFile) > -1) {
      console.log('Installing ' + component);
      var oldPath = process.cwd();
      process.chdir(componentPath);
      childProcess.execSync(nodeComand);
      process.chdir(oldPath);
      console.log();
    }
  }
});