code: function defaultFillCommandData(defaults, file, extension) {
    var data;
  
    try {
      data = require(file).command || {};
    } catch (e) {
      // If it's JavaScript then return the error
      if (extension === '.js') {
        data = {failedRequire: e};
      }
    }
  
    return _.merge(defaults, data);
  }
docs: The default function used to get metadata from a command