code: function printEnvironment(environment, path, outputFile) {
    // print sub-objects in an environment.
    if (path) environment = traverse(environment).get(path.split('.'));
    path = path ? '.' + path : '';
  
    if (argv.format === 'json' || outputFile) {
      var json = JSON.stringify(environment, null, 2);
      if (outputFile) fs.writeFileSync(outputFile, json, 'utf-8');
      else console.log(JSON.stringify(environment, null, 2));
    } else {
      environment = _.mapValues(environment, function(v) {
        return util.inspect(v, {colors: true});
      });
      console.log(chalk.blue('==> ') + chalk.bold(renv.environment + path));
      console.log(columnify(environment, {showHeaders: false, config: {
        key: {minWidth: parseInt(width * 0.4), maxWidth: parseInt(width * 0.4)},
        value: {minWidth: parseInt(width * 0.6), maxWidth: parseInt(width * 0.6)},
      }}));
    }
  }
docs: recursively print an environment.