function getClientEnvironment()

in config/env.js [104:136]

• 25 lines of code
• 2 McCabe index (conditional complexity)

function getClientEnvironment(publicUrl) {
  const ext = checkRequiredEnvVarsAndFillOptional();
  const raw = Object.keys(process.env)
    .filter(key => REACT_APP.test(key))
    .reduce(
      (env, key) => {
        env[key] = process.env[key];
        return env;
      },
      Object.assign(
        ext,
        {
          // Useful for determining whether we’re running in production mode.
          // Most importantly, it switches React into the correct mode.
          NODE_ENV: process.env.NODE_ENV || 'development',
          // Useful for resolving the correct path to static assets in `public`.
          // For example, <img src={process.env.PUBLIC_URL + '/img/logo.png'} />.
          // This should only be used as an escape hatch. Normally you would put
          // images into the `src` and `import` them in code to get their paths.
          PUBLIC_URL: publicUrl,
        },
      )
    );
  // Stringify all values so we can feed into Webpack DefinePlugin
  const stringified = {
    'process.env': Object.keys(raw).reduce((env, key) => {
      env[key] = JSON.stringify(raw[key]);
      return env;
    }, {}),
  };

  return { raw, stringified };
}