react-cosmos/dist/plugins/webpack/devServer.js

CLI for running React Cosmos inside webpack-powered apps

"use strict";

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

var _webpackHotMiddleware = _interopRequireDefault(require("@skidding/webpack-hot-middleware"));

var _path = _interopRequireDefault(require("path"));

var _static = require("../../shared/static");

var _utils = require("../../shared/utils");

var _webpack = require("./cosmosConfig/webpack");

var _shared = require("./shared");

var _getDevWebpackConfig = require("./webpackConfig/getDevWebpackConfig");

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

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

function webpackDevServer(_x) {
  return _webpackDevServer.apply(this, arguments);
}

function _webpackDevServer() {
  _webpackDevServer = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee2(_ref) {
    var cosmosConfig, expressApp, sendMessage, userWebpack, webpackConfig, webpackDerivedStaticPath, sendBuildMessage, webpackCompiler, onCompilationDone, wdm, wdmInst, _createWebpackCosmosC, hotReload;

    return regeneratorRuntime.wrap(function _callee2$(_context2) {
      while (1) {
        switch (_context2.prev = _context2.next) {
          case 0:
            sendBuildMessage = function _sendBuildMessage(msg) {
              sendMessage(msg);
            };

            cosmosConfig = _ref.cosmosConfig, expressApp = _ref.expressApp, sendMessage = _ref.sendMessage;

            if (!cosmosConfig.experimentalRendererUrl) {
              _context2.next = 4;
              break;
            }

            return _context2.abrupt("return");

          case 4:
            userWebpack = (0, _shared.getWebpack)(cosmosConfig.rootDir);

            if (userWebpack) {
              _context2.next = 7;
              break;
            }

            return _context2.abrupt("return");

          case 7:
            _context2.next = 9;
            return (0, _getDevWebpackConfig.getDevWebpackConfig)(cosmosConfig, userWebpack);

          case 9:
            webpackConfig = _context2.sent;

            // Serve static path derived from devServer.contentBase webpack config
            if (cosmosConfig.staticPath === null) {
              webpackDerivedStaticPath = getWebpackStaticPath(webpackConfig);

              if (webpackDerivedStaticPath !== null) {
                (0, _static.serveStaticDir)(expressApp, _path.default.resolve(cosmosConfig.rootDir, webpackDerivedStaticPath), cosmosConfig.publicUrl);
              }
            }

            webpackCompiler = userWebpack(webpackConfig);
            webpackCompiler.hooks.invalid.tap('Cosmos', function (filePath) {
              if (typeof filePath === 'string') {
                var relFilePath = _path.default.relative(process.cwd(), filePath);

                console.log('[Cosmos] webpack build invalidated by', relFilePath);
              } else {
                console.log('[Cosmos] webpack build invalidated by unknown file');
              }

              sendBuildMessage({
                type: 'buildStart'
              });
            });
            webpackCompiler.hooks.failed.tap('Cosmos', function () {
              sendBuildMessage({
                type: 'buildError'
              });
            });
            onCompilationDone = new Promise(function (resolve) {
              webpackCompiler.hooks.done.tap('Cosmos', function (stats) {
                resolve();

                if (stats.hasErrors()) {
                  sendBuildMessage({
                    type: 'buildError'
                  });
                } else {
                  sendBuildMessage({
                    type: 'buildDone'
                  });
                }
              });
            });
            console.log('[Cosmos] Building webpack...'); // Why import WDM here instead of at module level? Because it imports webpack,
            // which might not be installed in the user's codebase. If this were to happen
            // the Cosmos server would crash with a cryptic import error. See import here:
            // https://github.com/webpack/webpack-dev-middleware/blob/eb2e32bab57df11bdfbbac19474eb16817d504fe/lib/fs.js#L8
            // Instead, prior to importing WDM we check if webpack is installed and fail
            // gracefully if not.

            wdm = require('webpack-dev-middleware');
            wdmInst = wdm(webpackCompiler, {
              // publicPath is the base path for the webpack assets and has to match
              // webpack.output.path
              publicPath: (0, _utils.removeLeadingDot)(cosmosConfig.publicUrl)
            });
            expressApp.use(wdmInst);
            _createWebpackCosmosC = (0, _webpack.createWebpackCosmosConfig)(cosmosConfig), hotReload = _createWebpackCosmosC.hotReload;

            if (hotReload) {
              expressApp.use((0, _webpackHotMiddleware.default)(webpackCompiler));
            }

            _context2.next = 23;
            return onCompilationDone;

          case 23:
            return _context2.abrupt("return", /*#__PURE__*/_asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee() {
              return regeneratorRuntime.wrap(function _callee$(_context) {
                while (1) {
                  switch (_context.prev = _context.next) {
                    case 0:
                      _context.next = 2;
                      return new Promise(function (res) {
                        return wdmInst.close(res);
                      });

                    case 2:
                    case "end":
                      return _context.stop();
                  }
                }
              }, _callee);
            })));

          case 24:
          case "end":
            return _context2.stop();
        }
      }
    }, _callee2);
  }));
  return _webpackDevServer.apply(this, arguments);
}

function getWebpackStaticPath(_ref2) {
  var devServer = _ref2.devServer;
  return devServer && typeof devServer.contentBase === 'string' ? devServer.contentBase : null;
}