dead-finder.js

const fs = require('fs');
const path = require('path');
const _ = require('lodash');
const globby = require('globby');

const glob = '{components,modules,pages,utilities,globals,bundles,legacy-js}/**/*.{js,jsx}';

const stats = JSON.parse(fs.readFileSync(path.join(__dirname, 'stats.json')));

const entryFilter = x => /jsx?$/.test(x) && !/node_modules/.test(x);

const resolver = filePath => path.resolve(__dirname, filePath);

const testStoriesFilter = x => /(stories|test|fixture)(\.es6)?\.jsx?$/.test(x);

const filesInDepGraph = _.map(_.filter(_.map(stats.modules, 'id'), entryFilter), resolver);

const filesInRepo = _.map(globby.sync(glob), resolver);

const actualFilesOnly = _.reject(filesInRepo, testStoriesFilter);

const diff = _.difference(actualFilesOnly, filesInDepGraph);

console.log(JSON.stringify(diff, null, 2));