@incdevco/framework/gulp/calculate-lambda-package-sha256s/index.js

node.js lambda framework

var crypto = require('crypto');
var es = require('event-stream');
var fs = require('fs');

// lambda/*/index.js

module.exports = function (config) {
  'use strict';
  
  config = config || {};
  
  config.dest = config.dest || 'dist/lambda';
  
  config.packages = config.packages || {};
  
  return es.map(function (lambda, done) {
    
    var name = lambda.path.split('/').reverse()[1];
    
    var dest = config.dest + '/' + name;
    
    config.packages[name] = config.packages[name] || {};
    
    config.packages[name].sha256 = crypto.createHash('sha256')
      .update(fs.readFileSync(dest + '.zip'))
      .digest('hex');
      
    done();
    
  });
  
};