postinstall.js

var fs = require('fs');
var resolve = require('path').resolve;
var join = require('path').join;
var cp = require('child_process');

// get library path
var lib = resolve(__dirname, 'packages');

fs.readdirSync(lib)
    .forEach(function (mod) {
        var modPath = join(lib, mod);
// ensure path has package.json
        if (!fs.existsSync(join(modPath, 'package.json'))) return;

        console.log("Running npm install on "+modPath);
// install folder
        cp.execSync('npm install', { cwd: modPath, env: process.env, stdio: 'inherit' });
//cp.spawn('npm', ['i'], { env: process.env, cwd: modPath, stdio: 'inherit' })
    });