datapackage/lib/infer.js

Utilities to work with Data Packages as defined on specs.frictionlessdata.io

'use strict';

// Module API

/**
 * This function is async so it has to be used with `await` keyword or as a `Promise`.
 *
 * @param {string} pattern - glob file pattern
 * @returns {Object} returns data package descriptor
 */
var infer = function () {
  var _ref = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee(pattern) {
    var _ref2 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
        basePath = _ref2.basePath;

    var dataPackage, descriptor;
    return regeneratorRuntime.wrap(function _callee$(_context) {
      while (1) {
        switch (_context.prev = _context.next) {
          case 0:
            _context.next = 2;
            return Package.load({}, { basePath: basePath });

          case 2:
            dataPackage = _context.sent;
            _context.next = 5;
            return dataPackage.infer(pattern);

          case 5:
            descriptor = _context.sent;
            return _context.abrupt('return', descriptor);

          case 7:
          case 'end':
            return _context.stop();
        }
      }
    }, _callee, this);
  }));

  return function infer(_x) {
    return _ref.apply(this, arguments);
  };
}();

// System

function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { return Promise.resolve(value).then(function (value) { step("next", value); }, function (err) { step("throw", err); }); } } return step("next"); }); }; }

var _require = require('./package'),
    Package = _require.Package;

module.exports = {
  infer: infer
};