paths.js

const { resolve } = require('path')
const fs = require('fs');
const appDirectory = fs.realpathSync(process.cwd());
const resolveApp = relativePath => resolve(appDirectory, relativePath);
const moduleFileExtensions = [
  'web.mjs',
  'mjs',
  'web.js',
  'js',
  'web.ts',
  'ts',
  'web.tsx',
  'tsx',
  'json',
  'web.jsx',
  'jsx',
];

// Resolve file paths in the same order as webpack
const resolveModule = (resolveFn, filePath) => {
  const extension = moduleFileExtensions.find(extension =>
    fs.existsSync(resolveFn(`${filePath}.${extension}`))
  );

  if (extension) {
    return resolveFn(`${filePath}.${extension}`);
  }

  return resolveFn(`${filePath}.js`);
};
module.exports = {
    appPath: resolveApp('.'),
    appBuild: resolveApp('lib'),
    appPublic: resolveApp('public'),
    appPackageJson: resolveApp('package.json'),
    appSrc: resolveApp('src'),
    appTest: resolveApp('test'),
    appTsConfig: resolveApp('tsconfig.json'),
    appJsConfig: resolveApp('jsconfig.json'),
    yarnLockFile: resolveApp('yarn.lock'),
    proxySetup: resolveApp('src/setupProxy.js'),
    appNodeModules: resolveApp('node_modules'),
    indexHtmlPath:resolveApp('public/index.html'),
    moduleFileExtensions:moduleFileExtensions
  };