self importing firebase-functions

index.js

/**
 * Require all functions files.
 * /src/{function}/{function}.js
 * 
 * functions must export
 * {
 *   key: string     the name of the function,
 *   watcher: fn     the firebase-function watcher function
 * }
 * 
 */

let functions = [];
require('fs').readdirSync(__dirname + '/src/').forEach(function(file) {
  if (!file.startsWith('.')) {
    require(`./src/${file}/${file}`)(functions);
  }
});

/**
 * Export functions
 */

functions.forEach((fn) => {
  exports[fn.key] = fn.watcher;
});