diff --git a/config/makeWebpackConfig.js b/config/makeWebpackConfig.js new file mode 100644 index 0000000..67dd75c --- /dev/null +++ b/config/makeWebpackConfig.js @@ -0,0 +1,248 @@ +// @no-flow +const path = require("path"); +const webpack = require("webpack"); +const ManifestPlugin = require("webpack-manifest-plugin"); +const SWPrecacheWebpackPlugin = require("sw-precache-webpack-plugin"); +const StaticSiteGeneratorPlugin = require("static-site-generator-webpack-plugin"); +const eslintFormatter = require("react-dev-utils/eslintFormatter"); +const ModuleScopePlugin = require("react-dev-utils/ModuleScopePlugin"); +const paths = require("./paths"); +const getClientEnvironment = require("./env"); + +// Webpack uses `publicPath` to determine where the app is being served from. +// It requires a trailing slash, or the file assets will get an incorrect path. +const publicPath = paths.servedPath; +// Source maps are resource heavy and can cause out of memory issue for large source files. +const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== "false"; +// `publicUrl` is just like `publicPath`, but we will provide it to our app +// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript. +// Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz. +const publicUrl = publicPath.slice(0, -1); +// Get environment variables to inject into our app. +const env = getClientEnvironment(publicUrl); + +// Assert this just to be safe. +// Development builds of React are slow and not intended for production. +if (env.stringified["process.env"].NODE_ENV !== '"production"') { + throw new Error("Production builds must have NODE_ENV=production."); +} + +// This is the production configuration. +// It compiles slowly and is focused on producing a fast and minimal bundle. +// The development configuration is different and lives in a separate file. +module.exports = { + // Don't attempt to continue if there are any errors. + bail: true, + // We generate sourcemaps in production. This is slow but gives good results. + // You can exclude the *.map files from the build during deployment. + devtool: shouldUseSourceMap ? "source-map" : false, + // In production, we only want to load the polyfills and the app code. + entry: { + main: [require.resolve("./polyfills"), paths.appIndexJs], + ssr: [require.resolve("./polyfills"), paths.appServerSideRenderingIndexJs], + }, + output: { + // The build folder. + path: paths.appBuild, + // Generated JS file names (with nested folders). + // There will be one main bundle, and one file per asynchronous chunk. + // We don't currently advertise code splitting but Webpack supports it. + filename: "static/js/[name].[chunkhash:8].js", + chunkFilename: "static/js/[name].[chunkhash:8].chunk.js", + // We inferred the "public path" (such as / or /my-project) from homepage. + publicPath: publicPath, + // Point sourcemap entries to original disk location (format as URL on Windows) + devtoolModuleFilenameTemplate: (info) => + path + .relative(paths.appSrc, info.absoluteResourcePath) + .replace(/\\/g, "/"), + // We need to use a UMD module to build the static site. + libraryTarget: "umd", + }, + resolve: { + // This allows you to set a fallback for where Webpack should look for modules. + // We placed these paths second because we want `node_modules` to "win" + // if there are any conflicts. This matches Node resolution mechanism. + // https://github.com/facebookincubator/create-react-app/issues/253 + modules: ["node_modules", paths.appNodeModules].concat( + // It is guaranteed to exist because we tweak it in `env.js` + process.env.NODE_PATH.split(path.delimiter).filter(Boolean) + ), + // These are the reasonable defaults supported by the Node ecosystem. + // We also include JSX as a common component filename extension to support + // some tools, although we do not recommend using it, see: + // https://github.com/facebookincubator/create-react-app/issues/290 + // `web` extension prefixes have been added for better support + // for React Native Web. + extensions: [".web.js", ".mjs", ".js", ".json", ".web.jsx", ".jsx"], + alias: { + // Support React Native Web + // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/ + "react-native": "react-native-web", + }, + plugins: [ + // Prevents users from importing files from outside of src/ (or node_modules/). + // This often causes confusion because we only process files within src/ with babel. + // To fix this, we prevent you from importing files out of src/ -- if you'd like to, + // please link the files into your node_modules/ and let module-resolution kick in. + // Make sure your source files are compiled, as they will not be processed in any way. + new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]), + ], + }, + module: { + strictExportPresence: true, + rules: [ + // TODO: Disable require.ensure as it's not a standard language feature. + // We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176. + // { parser: { requireEnsure: false } }, + + // First, run the linter. + // It's important to do this before Babel processes the JS. + { + test: /\.(js|jsx|mjs)$/, + enforce: "pre", + use: [ + { + options: { + formatter: eslintFormatter, + eslintPath: require.resolve("eslint"), + }, + loader: require.resolve("eslint-loader"), + }, + ], + include: paths.appSrc, + }, + { + // "oneOf" will traverse all following loaders until one will + // match the requirements. When no loader matches it will fall + // back to the "file" loader at the end of the loader list. + oneOf: [ + // "url" loader works just like "file" loader but it also embeds + // assets smaller than specified size as data URLs to avoid requests. + { + test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/], + loader: require.resolve("url-loader"), + options: { + limit: 10000, + name: "static/media/[name].[hash:8].[ext]", + }, + }, + // Process JS with Babel. + { + test: /\.(js|jsx|mjs)$/, + include: paths.appSrc, + loader: require.resolve("babel-loader"), + options: { + compact: true, + }, + }, + { + test: /\.css$/, + loader: "css-loader", // TODO(@wchargin): add csso-loader + }, + // "file" loader makes sure assets end up in the `build` folder. + // When you `import` an asset, you get its filename. + // This loader doesn't use a "test" so it will catch all modules + // that fall through the other loaders. + { + loader: require.resolve("file-loader"), + // Exclude `js` files to keep "css" loader working as it injects + // it's runtime that would otherwise processed through "file" loader. + // Also exclude `html` and `json` extensions so they get processed + // by webpacks internal loaders. + exclude: [/\.(js|jsx|mjs)$/, /\.html$/, /\.json$/], + options: { + name: "static/media/[name].[hash:8].[ext]", + }, + }, + // ** STOP ** Are you adding a new loader? + // Make sure to add the new loader(s) before the "file" loader. + ], + }, + ], + }, + plugins: [ + new StaticSiteGeneratorPlugin({ + entry: "ssr", + paths: require(paths.appRouteData).routeData.map(({path}) => path), + locals: {}, + }), + // Makes some environment variables available to the JS code, for example: + // if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`. + // It is absolutely essential that NODE_ENV was set to production here. + // Otherwise React will be compiled in the very slow development mode. + new webpack.DefinePlugin(env.stringified), + // Minify the code. + new webpack.optimize.UglifyJsPlugin({ + compress: { + warnings: false, + // Disabled because of an issue with Uglify breaking seemingly valid code: + // https://github.com/facebookincubator/create-react-app/issues/2376 + // Pending further investigation: + // https://github.com/mishoo/UglifyJS2/issues/2011 + comparisons: false, + }, + mangle: { + safari10: true, + }, + output: { + comments: false, + // Turned on because emoji and regex is not minified properly using default + // https://github.com/facebookincubator/create-react-app/issues/2488 + ascii_only: true, + }, + sourceMap: shouldUseSourceMap, + }), + // Generate a manifest file which contains a mapping of all asset filenames + // to their corresponding output file so that tools can pick it up without + // having to parse `index.html`. + new ManifestPlugin({ + fileName: "asset-manifest.json", + }), + // Generate a service worker script that will precache, and keep up to date, + // the HTML & assets that are part of the Webpack build. + new SWPrecacheWebpackPlugin({ + // By default, a cache-busting query parameter is appended to requests + // used to populate the caches, to ensure the responses are fresh. + // If a URL is already hashed by Webpack, then there is no concern + // about it being stale, and the cache-busting can be skipped. + dontCacheBustUrlsMatching: /\.\w{8}\./, + filename: "service-worker.js", + logger(message) { + if (message.indexOf("Total precache size is") === 0) { + // This message occurs for every build and is a bit too noisy. + return; + } + if (message.indexOf("Skipping static resource") === 0) { + // This message obscures real errors so we ignore it. + // https://github.com/facebookincubator/create-react-app/issues/2612 + return; + } + console.log(message); + }, + minify: true, + // For unknown URLs, fallback to the index page + navigateFallback: publicUrl + "/index.html", + // Ignores URLs starting from /__ (useful for Firebase): + // https://github.com/facebookincubator/create-react-app/issues/2237#issuecomment-302693219 + navigateFallbackWhitelist: [/^(?!\/__).*/], + // Don't precache sourcemaps (they're large) and build asset manifest: + staticFileGlobsIgnorePatterns: [/\.map$/, /asset-manifest\.json$/], + }), + // Moment.js is an extremely popular library that bundles large locale files + // by default due to how Webpack interprets its code. This is a practical + // solution that requires the user to opt into importing specific locales. + // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack + // You can remove this if you don't use Moment.js: + new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/), + ], + // Some libraries import Node modules but don't use them in the browser. + // Tell Webpack to provide empty mocks for them so importing them works. + node: { + dgram: "empty", + fs: "empty", + net: "empty", + tls: "empty", + child_process: "empty", + }, +};