import { resolve, join } from 'path' import { createHash } from 'crypto' import webpack from 'webpack' import glob from 'glob-promise' import WriteFilePlugin from 'write-file-webpack-plugin' import FriendlyErrorsWebpackPlugin from 'friendly-errors-webpack-plugin' import CaseSensitivePathPlugin from 'case-sensitive-paths-webpack-plugin' import UnlinkFilePlugin from './plugins/unlink-file-plugin' import PagesPlugin from './plugins/pages-plugin' import CombineAssetsPlugin from './plugins/combine-assets-plugin' import getConfig from '../config' import * as babelCore from 'babel-core' import findBabelConfig from './babel/find-config' import rootModuleRelativePath from './root-module-relative-path' const documentPage = join('pages', '_document.js') const defaultPages = [ '_error.js', '_document.js' ] const nextPagesDir = join(__dirname, '..', '..', 'pages') const nextNodeModulesDir = join(__dirname, '..', '..', '..', 'node_modules') const interpolateNames = new Map(defaultPages.map((p) => { return [join(nextPagesDir, p), `dist/pages/${p}`] })) const relativeResolve = rootModuleRelativePath(require) export default async function createCompiler (dir, { dev = false, quiet = false, buildDir } = {}) { dir = resolve(dir) const config = getConfig(dir) const defaultEntries = dev ? [ join(__dirname, '..', '..', 'client', 'webpack-hot-middleware-client'), join(__dirname, '..', '..', 'client', 'on-demand-entries-client') ] : [] const mainJS = dev ? require.resolve('../../client/next-dev') : require.resolve('../../client/next') let minChunks const entry = async () => { const entries = { 'main.js': [ ...defaultEntries, mainJS ] } const pages = await glob('pages/**/*.js', { cwd: dir }) const devPages = pages.filter((p) => p === 'pages/_document.js' || p === 'pages/_error.js') // In the dev environment, on-demand-entry-handler will take care of // managing pages. if (dev) { for (const p of devPages) { entries[join('bundles', p)] = [`./${p}?entry`] } } else { for (const p of pages) { entries[join('bundles', p)] = [`./${p}?entry`] } } for (const p of defaultPages) { const entryName = join('bundles', 'pages', p) if (!entries[entryName]) { entries[entryName] = [join(nextPagesDir, p) + '?entry'] } } // calculate minChunks of CommonsChunkPlugin for later use minChunks = Math.max(2, pages.filter((p) => p !== documentPage).length) return entries } const plugins = [ new webpack.LoaderOptionsPlugin({ options: { context: dir, customInterpolateName (url, name, opts) { return interpolateNames.get(this.resourcePath) || url } } }), new WriteFilePlugin({ exitOnErrors: false, log: false, // required not to cache removed files useHashIndex: false }), new webpack.optimize.CommonsChunkPlugin({ name: 'commons', filename: 'commons.js', minChunks (module, count) { // In the dev we use on-demand-entries. // So, it makes no sense to use commonChunks based on the minChunks count. // Instead, we move all the code in node_modules into this chunk. // With that, we could gain better performance for page-rebuild process. if (dev) { return module.context && module.context.indexOf('node_modules') >= 0 } // NOTE: it depends on the fact that the entry funtion is always called // before applying CommonsChunkPlugin return count >= minChunks } }), // This chunk contains all the webpack related code. So, all the changes // related to that happens to this chunk. // It won't touch commons.js and that gives us much better re-build perf. new webpack.optimize.CommonsChunkPlugin({ name: 'manifest', filename: 'manifest.js' }), new webpack.DefinePlugin({ 'process.env.NODE_ENV': JSON.stringify(dev ? 'development' : 'production') }), new PagesPlugin(), new CaseSensitivePathPlugin() ] if (dev) { plugins.push( new webpack.HotModuleReplacementPlugin(), new webpack.NoEmitOnErrorsPlugin(), new UnlinkFilePlugin() ) if (!quiet) { plugins.push(new FriendlyErrorsWebpackPlugin()) } } else { plugins.push( new CombineAssetsPlugin({ input: ['manifest.js', 'commons.js', 'main.js'], output: 'app.js' }), new webpack.optimize.UglifyJsPlugin({ compress: { warnings: false }, sourceMap: false }) ) } const nodePathList = (process.env.NODE_PATH || '') .split(process.platform === 'win32' ? ';' : ':') .filter((p) => !!p) const mainBabelOptions = { cacheDirectory: true, sourceMaps: dev ? 'both' : false, presets: [] } const externalBabelConfig = findBabelConfig(dir) if (externalBabelConfig) { console.log(`> Using external babel configuration`) console.log(`> location: "${externalBabelConfig.loc}"`) // It's possible to turn off babelrc support via babelrc itself. // In that case, we should add our default preset. // That's why we need to do this. const { options } = externalBabelConfig mainBabelOptions.babelrc = options.babelrc !== false } else { mainBabelOptions.babelrc = false } // Add our default preset if the no "babelrc" found. if (!mainBabelOptions.babelrc) { mainBabelOptions.presets.push(require.resolve('./babel/preset')) } const rules = (dev ? [{ test: /\.js(\?[^?]*)?$/, loader: 'hot-self-accept-loader', include: [ join(dir, 'pages'), nextPagesDir ] }, { test: /\.js(\?[^?]*)?$/, loader: 'react-hot-loader/webpack', exclude: /node_modules/ }] : []) .concat([{ test: /\.json$/, loader: 'json-loader' }, { test: /\.(js|json)(\?[^?]*)?$/, loader: 'emit-file-loader', include: [dir, nextPagesDir], exclude (str) { return /node_modules/.test(str) && str.indexOf(nextPagesDir) !== 0 }, options: { name: 'dist/[path][name].[ext]', // By default, our babel config does not transpile ES2015 module syntax because // webpack knows how to handle them. (That's how it can do tree-shaking) // But Node.js doesn't know how to handle them. So, we have to transpile them here. transform ({ content, sourceMap, interpolatedName }) { // Only handle .js files if (!(/\.js$/.test(interpolatedName))) { return { content, sourceMap } } const transpiled = babelCore.transform(content, { babelrc: false, sourceMaps: dev ? 'both' : false, // Here we need to resolve all modules to the absolute paths. // Earlier we did it with the babel-preset. // But since we don't transpile ES2015 in the preset this is not resolving. // That's why we need to do it here. // See more: https://github.com/zeit/next.js/issues/951 plugins: [ [require.resolve('babel-plugin-transform-es2015-modules-commonjs')], [ require.resolve('babel-plugin-module-resolver'), { alias: { 'babel-runtime': relativeResolve('babel-runtime/package'), 'next/link': relativeResolve('../../lib/link'), 'next/prefetch': relativeResolve('../../lib/prefetch'), 'next/css': relativeResolve('../../lib/css'), 'next/head': relativeResolve('../../lib/head'), 'next/document': relativeResolve('../../server/document'), 'next/router': relativeResolve('../../lib/router'), 'next/error': relativeResolve('../../lib/error'), 'styled-jsx/style': relativeResolve('styled-jsx/style') } } ] ], inputSourceMap: sourceMap }) return { content: transpiled.code, sourceMap: transpiled.map } } } }, { loader: 'babel-loader', include: nextPagesDir, exclude (str) { return /node_modules/.test(str) && str.indexOf(nextPagesDir) !== 0 }, options: { babelrc: false, cacheDirectory: true, sourceMaps: dev ? 'both' : false, presets: [require.resolve('./babel/preset')] } }, { test: /\.js(\?[^?]*)?$/, loader: 'babel-loader', include: [dir], exclude (str) { return /node_modules/.test(str) }, options: mainBabelOptions }]) let webpackConfig = { context: dir, entry, output: { path: join(buildDir || dir, config.distDir), filename: '[name]', libraryTarget: 'commonjs2', publicPath: '/_webpack/', strictModuleExceptionHandling: true, devtoolModuleFilenameTemplate ({ resourcePath }) { const hash = createHash('sha1') hash.update(Date.now() + '') const id = hash.digest('hex').slice(0, 7) // append hash id for cache busting return `webpack:///${resourcePath}?${id}` } }, resolve: { modules: [ nextNodeModulesDir, 'node_modules', ...nodePathList ] }, resolveLoader: { modules: [ nextNodeModulesDir, 'node_modules', join(__dirname, 'loaders'), ...nodePathList ] }, plugins, module: { rules }, devtool: dev ? 'inline-source-map' : false, performance: { hints: false } } if (config.webpack) { console.log('> Using "webpack" config function defined in next.config.js.') webpackConfig = await config.webpack(webpackConfig, { dev }) } return webpack(webpackConfig) }