314 lines
13 KiB
JavaScript
314 lines
13 KiB
JavaScript
// @flow
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const express = require("express");
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/*::
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import type {
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$Application as ExpressApp,
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$Response as ExpressResponse,
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} from "express";
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*/
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const os = require("os");
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const path = require("path");
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const webpack = require("webpack");
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const RemoveBuildDirectoryPlugin = require("./RemoveBuildDirectoryPlugin");
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const ManifestPlugin = require("webpack-manifest-plugin");
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const SWPrecacheWebpackPlugin = require("sw-precache-webpack-plugin");
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const StaticSiteGeneratorPlugin = require("static-site-generator-webpack-plugin");
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const eslintFormatter = require("react-dev-utils/eslintFormatter");
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const ModuleScopePlugin = require("react-dev-utils/ModuleScopePlugin");
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const paths = require("./paths");
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const getClientEnvironment = require("./env");
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// Webpack uses `publicPath` to determine where the app is being served from.
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// It requires a trailing slash, or the file assets will get an incorrect path.
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const publicPath = paths.servedPath;
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// Source maps are resource heavy and can cause out of memory issue for large source files.
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const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== "false";
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// `publicUrl` is just like `publicPath`, but we will provide it to our app
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// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
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// Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
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const publicUrl = publicPath.slice(0, -1);
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// Get environment variables to inject into our app.
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const env = getClientEnvironment(publicUrl);
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function makeConfig(mode /*: "production" | "development" */) {
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return {
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// Don't attempt to continue if there are any errors.
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bail: true,
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// We generate sourcemaps in production. This is slow but gives good results.
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// You can exclude the *.map files from the build during deployment.
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devtool: shouldUseSourceMap ? "source-map" : false,
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// In production, we only want to load the polyfills and the app code.
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entry: {
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main: [require.resolve("./polyfills"), paths.appIndexJs],
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ssr: [
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require.resolve("./polyfills"),
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paths.appServerSideRenderingIndexJs,
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],
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},
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devServer: {
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inline: false,
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before: (app /*: ExpressApp */) => {
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const apiRoot = "/api/v1/data";
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const rejectCache = (_unused_req, res /*: ExpressResponse */) => {
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res.status(400).send("Bad Request: Cache unavailable at runtime\n");
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};
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app.get(`${apiRoot}/cache`, rejectCache);
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app.get(`${apiRoot}/cache/*`, rejectCache);
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app.use(
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apiRoot,
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express.static(
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process.env.SOURCECRED_DIRECTORY ||
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path.join(os.tmpdir(), "sourcecred")
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)
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);
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},
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},
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output: {
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// The build folder.
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path: paths.appBuild,
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// Generated JS file names (with nested folders).
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// There will be one main bundle, and one file per asynchronous chunk.
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// We don't currently advertise code splitting but Webpack supports it.
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filename: "static/js/[name].[chunkhash:8].js",
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chunkFilename: "static/js/[name].[chunkhash:8].chunk.js",
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// We inferred the "public path" (such as / or /my-project) from homepage.
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publicPath: publicPath,
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// Point sourcemap entries to original disk location (format as URL on Windows)
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devtoolModuleFilenameTemplate: (
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info /*:
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{|
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// https://webpack.js.org/configuration/output/#output-devtoolmodulefilenametemplate
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+absoluteResourcePath: string,
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+allLoaders: string,
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+hash: string,
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+id: string,
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+loaders: string,
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+resource: string,
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+resourcePath: string,
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+namespace: string,
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|}
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*/
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) =>
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path
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.relative(paths.appSrc, info.absoluteResourcePath)
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.replace(/\\/g, "/"),
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// We need to use a UMD module to build the static site.
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libraryTarget: "umd",
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},
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resolve: {
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// This allows you to set a fallback for where Webpack should look for modules.
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// We placed these paths second because we want `node_modules` to "win"
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// if there are any conflicts. This matches Node resolution mechanism.
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// https://github.com/facebookincubator/create-react-app/issues/253
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modules: [
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"node_modules",
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paths.appNodeModules,
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...(process.env.NODE_PATH || "").split(path.delimiter).filter(Boolean),
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],
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// These are the reasonable defaults supported by the Node ecosystem.
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// We also include JSX as a common component filename extension to support
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// some tools, although we do not recommend using it, see:
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// https://github.com/facebookincubator/create-react-app/issues/290
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// `web` extension prefixes have been added for better support
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// for React Native Web.
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extensions: [".web.js", ".mjs", ".js", ".json", ".web.jsx", ".jsx"],
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alias: {
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// Support React Native Web
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// https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
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"react-native": "react-native-web",
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},
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plugins: [
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// Prevents users from importing files from outside of src/ (or node_modules/).
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// This often causes confusion because we only process files within src/ with babel.
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// To fix this, we prevent you from importing files out of src/ -- if you'd like to,
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// please link the files into your node_modules/ and let module-resolution kick in.
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// Make sure your source files are compiled, as they will not be processed in any way.
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new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
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],
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},
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module: {
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strictExportPresence: true,
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rules: [
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// TODO: Disable require.ensure as it's not a standard language feature.
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// We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176.
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// { parser: { requireEnsure: false } },
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// First, run the linter.
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// It's important to do this before Babel processes the JS.
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{
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test: /\.(js|jsx|mjs)$/,
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enforce: "pre",
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use: [
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{
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options: {
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formatter: eslintFormatter,
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eslintPath: require.resolve("eslint"),
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},
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loader: require.resolve("eslint-loader"),
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},
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],
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include: paths.appSrc,
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},
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{
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// "oneOf" will traverse all following loaders until one will
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// match the requirements. When no loader matches it will fall
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// back to the "file" loader at the end of the loader list.
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oneOf: [
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// "url" loader works just like "file" loader but it also embeds
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// assets smaller than specified size as data URLs to avoid requests.
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{
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test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
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loader: require.resolve("url-loader"),
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options: {
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limit: 10000,
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name: "static/media/[name].[hash:8].[ext]",
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},
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},
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// Process JS with Babel.
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{
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test: /\.(js|jsx|mjs)$/,
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include: paths.appSrc,
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loader: require.resolve("babel-loader"),
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options: {
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compact: true,
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},
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},
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{
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test: /\.css$/,
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loader: "css-loader", // TODO(@wchargin): add csso-loader
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},
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// "file" loader makes sure assets end up in the `build` folder.
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// When you `import` an asset, you get its filename.
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// This loader doesn't use a "test" so it will catch all modules
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// that fall through the other loaders.
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{
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loader: require.resolve("file-loader"),
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// Exclude `js` files to keep "css" loader working as it injects
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// it's runtime that would otherwise processed through "file" loader.
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// Also exclude `html` and `json` extensions so they get processed
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// by webpacks internal loaders.
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exclude: [/\.(js|jsx|mjs)$/, /\.html$/, /\.json$/],
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options: {
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name: "static/media/[name].[hash:8].[ext]",
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},
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},
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// ** STOP ** Are you adding a new loader?
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// Make sure to add the new loader(s) before the "file" loader.
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],
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},
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],
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},
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plugins: plugins(mode),
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// Some libraries import Node modules but don't use them in the browser.
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// Tell Webpack to provide empty mocks for them so importing them works.
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node: {
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dgram: "empty",
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fs: "empty",
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net: "empty",
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tls: "empty",
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child_process: "empty",
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},
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};
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}
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function plugins(mode /*: "development" | "production" */) {
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const basePlugins = [
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new StaticSiteGeneratorPlugin({
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entry: "ssr",
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// $ExpectFlowError(dynamic require)
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paths: require(paths.appRouteData).routeData.map(({path}) => path),
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locals: {},
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}),
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// Makes some environment variables available to the JS code, for example:
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// if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
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// It is absolutely essential that NODE_ENV was set to production here.
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// Otherwise React will be compiled in the very slow development mode.
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new webpack.DefinePlugin(env.stringified),
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// Generate a manifest file which contains a mapping of all asset filenames
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// to their corresponding output file so that tools can pick it up without
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// having to parse `index.html`.
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new ManifestPlugin({
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fileName: "asset-manifest.json",
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}),
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// Generate a service worker script that will precache, and keep up to date,
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// the HTML & assets that are part of the Webpack build.
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new SWPrecacheWebpackPlugin({
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// By default, a cache-busting query parameter is appended to requests
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// used to populate the caches, to ensure the responses are fresh.
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// If a URL is already hashed by Webpack, then there is no concern
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// about it being stale, and the cache-busting can be skipped.
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dontCacheBustUrlsMatching: /\.\w{8}\./,
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filename: "service-worker.js",
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logger(message) {
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if (message.indexOf("Total precache size is") === 0) {
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// This message occurs for every build and is a bit too noisy.
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return;
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}
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if (message.indexOf("Skipping static resource") === 0) {
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// This message obscures real errors so we ignore it.
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// https://github.com/facebookincubator/create-react-app/issues/2612
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return;
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}
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console.log(message);
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},
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minify: true,
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// For unknown URLs, fallback to the index page
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navigateFallback: publicUrl + "/index.html",
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// Ignores URLs starting from /__ (useful for Firebase):
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// https://github.com/facebookincubator/create-react-app/issues/2237#issuecomment-302693219
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navigateFallbackWhitelist: [/^(?!\/__).*/],
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// Don't precache sourcemaps (they're large) and build asset manifest:
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staticFileGlobsIgnorePatterns: [/\.map$/, /asset-manifest\.json$/],
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}),
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// Moment.js is an extremely popular library that bundles large locale files
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// by default due to how Webpack interprets its code. This is a practical
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// solution that requires the user to opt into importing specific locales.
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// https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
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// You can remove this if you don't use Moment.js:
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new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
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];
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const prodOnlyPlugins = [
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// Remove the output directory before starting the build.
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new RemoveBuildDirectoryPlugin(),
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// Minify the code.
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new webpack.optimize.UglifyJsPlugin({
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compress: {
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warnings: false,
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// Disabled because of an issue with Uglify breaking seemingly valid code:
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// https://github.com/facebookincubator/create-react-app/issues/2376
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// Pending further investigation:
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// https://github.com/mishoo/UglifyJS2/issues/2011
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comparisons: false,
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},
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mangle: {
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safari10: true,
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},
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output: {
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comments: false,
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// Turned on because emoji and regex is not minified properly using default
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// https://github.com/facebookincubator/create-react-app/issues/2488
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ascii_only: true,
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},
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sourceMap: shouldUseSourceMap,
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}),
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];
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switch (mode) {
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case "development":
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return basePlugins;
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case "production":
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return basePlugins.concat(prodOnlyPlugins);
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default:
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throw new Error(/*:: (*/ mode /*: empty) */);
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}
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}
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function getMode() {
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const mode = process.env.NODE_ENV;
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if (mode !== "production" && mode !== "development") {
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throw new Error("unknown mode: " + String(mode));
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}
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return mode;
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}
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module.exports = makeConfig(getMode());
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