hot-reloader.js

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _extends2 = require('babel-runtime/helpers/extends');

var _extends3 = _interopRequireDefault(_extends2);

var _toConsumableArray2 = require('babel-runtime/helpers/toConsumableArray');

var _toConsumableArray3 = _interopRequireDefault(_toConsumableArray2);

var _slicedToArray2 = require('babel-runtime/helpers/slicedToArray');

var _slicedToArray3 = _interopRequireDefault(_slicedToArray2);

var _map = require('babel-runtime/core-js/map');

var _map2 = _interopRequireDefault(_map);

var _set = require('babel-runtime/core-js/set');

var _set2 = _interopRequireDefault(_set);

var _keys = require('babel-runtime/core-js/object/keys');

var _keys2 = _interopRequireDefault(_keys);

var _getIterator2 = require('babel-runtime/core-js/get-iterator');

var _getIterator3 = _interopRequireDefault(_getIterator2);

var _regenerator = require('babel-runtime/regenerator');

var _regenerator2 = _interopRequireDefault(_regenerator);

var _promise = require('babel-runtime/core-js/promise');

var _promise2 = _interopRequireDefault(_promise);

var _asyncToGenerator2 = require('babel-runtime/helpers/asyncToGenerator');

var _asyncToGenerator3 = _interopRequireDefault(_asyncToGenerator2);

var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _createClass2 = require('babel-runtime/helpers/createClass');

var _createClass3 = _interopRequireDefault(_createClass2);

var _path = require('path');

var _webpackDevMiddleware = require('webpack-dev-middleware');

var _webpackDevMiddleware2 = _interopRequireDefault(_webpackDevMiddleware);

var _webpackHotMiddleware = require('webpack-hot-middleware');

var _webpackHotMiddleware2 = _interopRequireDefault(_webpackHotMiddleware);

var _onDemandEntryHandler = require('./on-demand-entry-handler');

var _onDemandEntryHandler2 = _interopRequireDefault(_onDemandEntryHandler);

var _webpack = require('webpack');

var _webpack2 = _interopRequireDefault(_webpack);

var _webpack3 = require('./build/webpack');

var _webpack4 = _interopRequireDefault(_webpack3);

var _clean = require('./build/clean');

var _clean2 = _interopRequireDefault(_clean);

var _config = require('./config');

var _config2 = _interopRequireDefault(_config);

var _uuid = require('uuid');

var _uuid2 = _interopRequireDefault(_uuid);

var _utils = require('./utils');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var HotReloader = function () {
  function HotReloader(dir) {
    var _ref = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
        quiet = _ref.quiet,
        conf = _ref.conf;

    (0, _classCallCheck3.default)(this, HotReloader);

    this.dir = dir;
    this.quiet = quiet;
    this.middlewares = [];
    this.webpackDevMiddleware = null;
    this.webpackHotMiddleware = null;
    this.initialized = false;
    this.stats = null;
    this.compilationErrors = null;
    this.prevAssets = null;
    this.prevChunkNames = null;
    this.prevFailedChunkNames = null;
    this.prevChunkHashes = null;
    // Here buildId could be any value.
    // Our router accepts any value in the dev mode.
    // But for the webpack-compiler and for the webpack-dev-server
    // it should be the same value.
    this.buildId = _uuid2.default.v4();

    this.config = (0, _config2.default)(dir, conf);
  }

  (0, _createClass3.default)(HotReloader, [{
    key: 'run',
    value: function () {
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        var _this = this;

        var _addCorsSupport, preflight, _loop, _iteratorNormalCompletion, _didIteratorError, _iteratorError, _iterator, _step, fn;

        return _regenerator2.default.wrap(function _callee$(_context2) {
          while (1) {
            switch (_context2.prev = _context2.next) {
              case 0:
                // Usually CORS support is not needed for the hot-reloader (this is dev only feature)
                // With when the app runs for multi-zones support behind a proxy,
                // the current page is trying to access this URL via assetPrefix.
                // That's when the CORS support is needed.
                _addCorsSupport = (0, _utils.addCorsSupport)(req, res), preflight = _addCorsSupport.preflight;

                if (!preflight) {
                  _context2.next = 3;
                  break;
                }

                return _context2.abrupt('return');

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                _iteratorNormalCompletion = true;
                _didIteratorError = false;
                _iteratorError = undefined;
                _context2.prev = 7;
                _iterator = (0, _getIterator3.default)(this.middlewares);

              case 9:
                if (_iteratorNormalCompletion = (_step = _iterator.next()).done) {
                  _context2.next = 15;
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                fn = _step.value;
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                if (!_didIteratorError) {
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      function run(_x2, _x3) {
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                compiler = (0, _webpack2.default)(configs);
                _context3.next = 8;
                return this.prepareBuildTools(compiler);

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                buildTools = _context3.sent;

                this.assignBuildTools(buildTools);

                _context3.next = 12;
                return this.waitUntilValid();

              case 12:
                this.stats = _context3.sent.stats[0];

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              case 'end':
                return _context3.stop();
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    key: 'stop',
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        return _regenerator2.default.wrap(function _callee3$(_context4) {
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              case 0:
                middleware = webpackDevMiddleware || this.webpackDevMiddleware;

                if (!middleware) {
                  _context4.next = 3;
                  break;
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                return _context4.abrupt('return', new _promise2.default(function (resolve, reject) {
                  middleware.close(function (err) {
                    if (err) return reject(err);
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              case 3:
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        var configs, compiler, buildTools, oldWebpackDevMiddleware;
        return _regenerator2.default.wrap(function _callee4$(_context5) {
          while (1) {
            switch (_context5.prev = _context5.next) {
              case 0:
                this.stats = null;

                _context5.next = 3;
                return (0, _clean2.default)(this.dir);

              case 3:
                _context5.next = 5;
                return _promise2.default.all([(0, _webpack4.default)(this.dir, { dev: true, isServer: false, config: this.config }), (0, _webpack4.default)(this.dir, { dev: true, isServer: true, config: this.config })]);

              case 5:
                configs = _context5.sent;
                compiler = (0, _webpack2.default)(configs);
                _context5.next = 9;
                return this.prepareBuildTools(compiler);

              case 9:
                buildTools = _context5.sent;
                _context5.next = 12;
                return this.waitUntilValid(buildTools.webpackDevMiddleware);

              case 12:
                this.stats = _context5.sent;
                oldWebpackDevMiddleware = this.webpackDevMiddleware;


                this.assignBuildTools(buildTools);
                _context5.next = 17;
                return this.stop(oldWebpackDevMiddleware);

              case 17:
              case 'end':
                return _context5.stop();
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      function reload() {
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  }, {
    key: 'assignBuildTools',
    value: function assignBuildTools(_ref6) {
      var webpackDevMiddleware = _ref6.webpackDevMiddleware,
          webpackHotMiddleware = _ref6.webpackHotMiddleware,
          onDemandEntries = _ref6.onDemandEntries;

      this.webpackDevMiddleware = webpackDevMiddleware;
      this.webpackHotMiddleware = webpackHotMiddleware;
      this.onDemandEntries = onDemandEntries;
      this.middlewares = [webpackDevMiddleware, webpackHotMiddleware, onDemandEntries.middleware()];
    }
  }, {
    key: 'prepareBuildTools',
    value: function () {
      var _ref7 = (0, _asyncToGenerator3.default)( /*#__PURE__*/_regenerator2.default.mark(function _callee5(compiler) {
        var _this2 = this;

        var ignored, webpackDevMiddlewareConfig, webpackDevMiddleware, webpackHotMiddleware, onDemandEntries;
        return _regenerator2.default.wrap(function _callee5$(_context6) {
          while (1) {
            switch (_context6.prev = _context6.next) {
              case 0:
                // This flushes require.cache after emitting the files. Providing 'hot reloading' of server files.
                compiler.compilers.forEach(function (singleCompiler) {
                  singleCompiler.plugin('after-emit', function (compilation, callback) {
                    var assets = compilation.assets;


                    if (_this2.prevAssets) {
                      var _iteratorNormalCompletion2 = true;
                      var _didIteratorError2 = false;
                      var _iteratorError2 = undefined;

                      try {
                        for (var _iterator2 = (0, _getIterator3.default)((0, _keys2.default)(assets)), _step2; !(_iteratorNormalCompletion2 = (_step2 = _iterator2.next()).done); _iteratorNormalCompletion2 = true) {
                          var f = _step2.value;

                          deleteCache(assets[f].existsAt);
                        }
                      } catch (err) {
                        _didIteratorError2 = true;
                        _iteratorError2 = err;
                      } finally {
                        try {
                          if (!_iteratorNormalCompletion2 && _iterator2.return) {
                            _iterator2.return();
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                        } finally {
                          if (_didIteratorError2) {
                            throw _iteratorError2;
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                      var _iteratorNormalCompletion3 = true;
                      var _didIteratorError3 = false;
                      var _iteratorError3 = undefined;

                      try {
                        for (var _iterator3 = (0, _getIterator3.default)((0, _keys2.default)(_this2.prevAssets)), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
                          var _f = _step3.value;

                          if (!assets[_f]) {
                            deleteCache(_this2.prevAssets[_f].existsAt);
                          }
                        }
                      } catch (err) {
                        _didIteratorError3 = true;
                        _iteratorError3 = err;
                      } finally {
                        try {
                          if (!_iteratorNormalCompletion3 && _iterator3.return) {
                            _iterator3.return();
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                        } finally {
                          if (_didIteratorError3) {
                            throw _iteratorError3;
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                        }
                      }
                    }
                    _this2.prevAssets = assets;

                    callback();
                  });
                });

                compiler.compilers[0].plugin('done', function (stats) {
                  var compilation = stats.compilation;

                  var chunkNames = new _set2.default(compilation.chunks.map(function (c) {
                    return c.name;
                  }).filter(function (name) {
                    return _utils.IS_BUNDLED_PAGE.test(name);
                  }));

                  var failedChunkNames = new _set2.default(compilation.errors.map(function (e) {
                    return e.module.reasons;
                  }).reduce(function (a, b) {
                    return a.concat(b);
                  }, []).map(function (r) {
                    return r.module.chunks;
                  }).reduce(function (a, b) {
                    return a.concat(b);
                  }, []).map(function (c) {
                    return c.name;
                  }));

                  var chunkHashes = new _map2.default(compilation.chunks.filter(function (c) {
                    return _utils.IS_BUNDLED_PAGE.test(c.name);
                  }).map(function (c) {
                    return [c.name, c.hash];
                  }));

                  if (_this2.initialized) {
                    // detect chunks which have to be replaced with a new template
                    // e.g, pages/index.js <-> pages/_error.js
                    var added = diff(chunkNames, _this2.prevChunkNames);
                    var removed = diff(_this2.prevChunkNames, chunkNames);
                    var succeeded = diff(_this2.prevFailedChunkNames, failedChunkNames);

                    // reload all failed chunks to replace the templace to the error ones,
                    // and to update error content
                    var failed = failedChunkNames;

                    var rootDir = (0, _path.join)('bundles', 'pages');

                    var _iteratorNormalCompletion4 = true;
                    var _didIteratorError4 = false;
                    var _iteratorError4 = undefined;

                    try {
                      for (var _iterator4 = (0, _getIterator3.default)(new _set2.default([].concat((0, _toConsumableArray3.default)(added), (0, _toConsumableArray3.default)(removed), (0, _toConsumableArray3.default)(failed), (0, _toConsumableArray3.default)(succeeded)))), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true) {
                        var n = _step4.value;

                        var route = toRoute((0, _path.relative)(rootDir, n));
                        _this2.send('reload', route);
                      }
                    } catch (err) {
                      _didIteratorError4 = true;
                      _iteratorError4 = err;
                    } finally {
                      try {
                        if (!_iteratorNormalCompletion4 && _iterator4.return) {
                          _iterator4.return();
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                      } finally {
                        if (_didIteratorError4) {
                          throw _iteratorError4;
                        }
                      }
                    }

                    var _iteratorNormalCompletion5 = true;
                    var _didIteratorError5 = false;
                    var _iteratorError5 = undefined;

                    try {
                      for (var _iterator5 = (0, _getIterator3.default)(chunkHashes), _step5; !(_iteratorNormalCompletion5 = (_step5 = _iterator5.next()).done); _iteratorNormalCompletion5 = true) {
                        var _ref8 = _step5.value;

                        var _ref9 = (0, _slicedToArray3.default)(_ref8, 2);

                        var _n = _ref9[0];
                        var hash = _ref9[1];

                        if (!_this2.prevChunkHashes.has(_n)) continue;
                        if (_this2.prevChunkHashes.get(_n) === hash) continue;

                        var route = toRoute((0, _path.relative)(rootDir, _n));

                        // notify change to recover from runtime errors
                        _this2.send('change', route);
                      }
                    } catch (err) {
                      _didIteratorError5 = true;
                      _iteratorError5 = err;
                    } finally {
                      try {
                        if (!_iteratorNormalCompletion5 && _iterator5.return) {
                          _iterator5.return();
                        }
                      } finally {
                        if (_didIteratorError5) {
                          throw _iteratorError5;
                        }
                      }
                    }
                  }

                  _this2.initialized = true;
                  _this2.stats = stats;
                  _this2.compilationErrors = null;
                  _this2.prevChunkNames = chunkNames;
                  _this2.prevFailedChunkNames = failedChunkNames;
                  _this2.prevChunkHashes = chunkHashes;
                });

                ignored = [/(^|[/\\])\../, // .dotfiles
                /node_modules/];
                webpackDevMiddlewareConfig = {
                  publicPath: '/_next/webpack/',
                  noInfo: true,
                  quiet: true,
                  clientLogLevel: 'warning',
                  watchOptions: { ignored: ignored }
                };


                if (this.config.webpackDevMiddleware) {
                  console.log('> Using "webpackDevMiddleware" config function defined in ' + this.config.configOrigin + '.');
                  webpackDevMiddlewareConfig = this.config.webpackDevMiddleware(webpackDevMiddlewareConfig);
                }

                webpackDevMiddleware = (0, _webpackDevMiddleware2.default)(compiler, webpackDevMiddlewareConfig);
                webpackHotMiddleware = (0, _webpackHotMiddleware2.default)(compiler.compilers[0], {
                  path: '/_next/webpack-hmr',
                  log: false,
                  heartbeat: 2500
                });
                onDemandEntries = (0, _onDemandEntryHandler2.default)(webpackDevMiddleware, compiler.compilers, (0, _extends3.default)({
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                  dev: true,
                  reload: this.reload.bind(this)
                }, this.config.onDemandEntries));
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                  webpackDevMiddleware: webpackDevMiddleware,
                  webpackHotMiddleware: webpackHotMiddleware,
                  onDemandEntries: onDemandEntries
                });

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    key: 'ensurePage',
    value: function () {
      var _ref11 = (0, _asyncToGenerator3.default)( /*#__PURE__*/_regenerator2.default.mark(function _callee7(page) {
        return _regenerator2.default.wrap(function _callee7$(_context8) {
          while (1) {
            switch (_context8.prev = _context8.next) {
              case 0:
                _context8.next = 2;
                return this.onDemandEntries.ensurePage(page);

              case 2:
              case 'end':
                return _context8.stop();
            }
          }
        }, _callee7, this);
      }));

      function ensurePage(_x6) {
        return _ref11.apply(this, arguments);
      }

      return ensurePage;
    }()
  }]);
  return HotReloader;
}();

exports.default = HotReloader;


function deleteCache(path) {
  delete require.cache[path];
}

function diff(a, b) {
  return new _set2.default([].concat((0, _toConsumableArray3.default)(a)).filter(function (v) {
    return !b.has(v);
  }));
}

function toRoute(file) {
  var f = _path.sep === '\\' ? file.replace(/\\/g, '/') : file;
  return ('/' + f).replace(/(\/index)?\.js$/, '') || '/';
}