yaml-diff.js

var diff = require('deep-diff').diff;
var yaml = require('js-yaml');
var es = require('event-stream');
var fs = require('vinyl-fs');
var tokens = {};

fs.src([
  "./modules/**/config/locales/en.yml",
  "./modules/**/config/locales/ru.yml"
]).pipe(es.map(function (file, callback) {
  callback(null, yaml.safeLoad(file.contents.toString()));
})).pipe(es.map(function (json, callback) {
  console.log(diff(json, tokens)[0].lhs);
})).on("end", function (err) {
  console.log(err);
});