1211 lines
44 KiB
JavaScript
1211 lines
44 KiB
JavaScript
// @ts-check
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'use strict';
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const promisify = require('util').promisify;
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const vm = require('vm');
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const fs = require('fs');
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const _ = require('lodash');
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const path = require('path');
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const { CachedChildCompilation } = require('./lib/cached-child-compiler');
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const { createHtmlTagObject, htmlTagObjectToString, HtmlTagArray } = require('./lib/html-tags');
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const prettyError = require('./lib/errors.js');
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const chunkSorter = require('./lib/chunksorter.js');
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const getHtmlWebpackPluginHooks = require('./lib/hooks.js').getHtmlWebpackPluginHooks;
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/** @typedef {import("./typings").HtmlTagObject} HtmlTagObject */
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/** @typedef {import("./typings").Options} HtmlWebpackOptions */
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/** @typedef {import("./typings").ProcessedOptions} ProcessedHtmlWebpackOptions */
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/** @typedef {import("./typings").TemplateParameter} TemplateParameter */
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/** @typedef {import("webpack").Compiler} Compiler */
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/** @typedef {ReturnType<Compiler["getInfrastructureLogger"]>} Logger */
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/** @typedef {import("webpack/lib/Compilation.js")} Compilation */
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/** @typedef {Array<{ name: string, source: import('webpack').sources.Source, info?: import('webpack').AssetInfo }>} PreviousEmittedAssets */
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/** @typedef {{ publicPath: string, js: Array<string>, css: Array<string>, manifest?: string, favicon?: string }} AssetsInformationByGroups */
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class HtmlWebpackPlugin {
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/**
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* @param {HtmlWebpackOptions} [options]
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*/
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constructor (options) {
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/** @type {HtmlWebpackOptions} */
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// TODO remove me in the next major release
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this.userOptions = options || {};
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this.version = HtmlWebpackPlugin.version;
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// Default options
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/** @type {ProcessedHtmlWebpackOptions} */
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const defaultOptions = {
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template: 'auto',
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templateContent: false,
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templateParameters: templateParametersGenerator,
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filename: 'index.html',
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publicPath: this.userOptions.publicPath === undefined ? 'auto' : this.userOptions.publicPath,
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hash: false,
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inject: this.userOptions.scriptLoading === 'blocking' ? 'body' : 'head',
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scriptLoading: 'defer',
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compile: true,
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favicon: false,
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minify: 'auto',
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cache: true,
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showErrors: true,
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chunks: 'all',
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excludeChunks: [],
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chunksSortMode: 'auto',
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meta: {},
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base: false,
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title: 'Webpack App',
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xhtml: false
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};
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/** @type {ProcessedHtmlWebpackOptions} */
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this.options = Object.assign(defaultOptions, this.userOptions);
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}
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/**
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*
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* @param {Compiler} compiler
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* @returns {void}
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*/
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apply (compiler) {
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this.logger = compiler.getInfrastructureLogger('HtmlWebpackPlugin');
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// Wait for configuration preset plugions to apply all configure webpack defaults
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compiler.hooks.initialize.tap('HtmlWebpackPlugin', () => {
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const options = this.options;
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options.template = this.getTemplatePath(this.options.template, compiler.context);
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// Assert correct option spelling
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if (options.scriptLoading !== 'defer' && options.scriptLoading !== 'blocking' && options.scriptLoading !== 'module' && options.scriptLoading !== 'systemjs-module') {
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/** @type {Logger} */
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(this.logger).error('The "scriptLoading" option need to be set to "defer", "blocking" or "module" or "systemjs-module"');
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}
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if (options.inject !== true && options.inject !== false && options.inject !== 'head' && options.inject !== 'body') {
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/** @type {Logger} */
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(this.logger).error('The `inject` option needs to be set to true, false, "head" or "body');
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}
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if (
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this.options.templateParameters !== false &&
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typeof this.options.templateParameters !== 'function' &&
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typeof this.options.templateParameters !== 'object'
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) {
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/** @type {Logger} */
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(this.logger).error('The `templateParameters` has to be either a function or an object or false');
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}
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// Default metaOptions if no template is provided
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if (!this.userOptions.template && options.templateContent === false && options.meta) {
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options.meta = Object.assign(
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{},
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options.meta,
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{
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// TODO remove in the next major release
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// From https://developer.mozilla.org/en-US/docs/Mozilla/Mobile/Viewport_meta_tag
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viewport: 'width=device-width, initial-scale=1'
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},
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this.userOptions.meta
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);
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}
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// entryName to fileName conversion function
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const userOptionFilename = this.userOptions.filename || this.options.filename;
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const filenameFunction = typeof userOptionFilename === 'function'
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? userOptionFilename
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// Replace '[name]' with entry name
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: (entryName) => userOptionFilename.replace(/\[name\]/g, entryName);
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/** output filenames for the given entry names */
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const entryNames = Object.keys(compiler.options.entry);
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const outputFileNames = new Set((entryNames.length ? entryNames : ['main']).map(filenameFunction));
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// Hook all options into the webpack compiler
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outputFileNames.forEach((outputFileName) => {
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// Instance variables to keep caching information for multiple builds
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const assetJson = { value: undefined };
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/**
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* store the previous generated asset to emit them even if the content did not change
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* to support watch mode for third party plugins like the clean-webpack-plugin or the compression plugin
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* @type {PreviousEmittedAssets}
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*/
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const previousEmittedAssets = [];
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// Inject child compiler plugin
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const childCompilerPlugin = new CachedChildCompilation(compiler);
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if (!this.options.templateContent) {
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childCompilerPlugin.addEntry(this.options.template);
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}
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// convert absolute filename into relative so that webpack can
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// generate it at correct location
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let filename = outputFileName;
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if (path.resolve(filename) === path.normalize(filename)) {
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const outputPath = /** @type {string} - Once initialized the path is always a string */(compiler.options.output.path);
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filename = path.relative(outputPath, filename);
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}
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compiler.hooks.thisCompilation.tap('HtmlWebpackPlugin',
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/**
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* Hook into the webpack compilation
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* @param {Compilation} compilation
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*/
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(compilation) => {
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compilation.hooks.processAssets.tapAsync(
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{
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name: 'HtmlWebpackPlugin',
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stage:
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/**
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* Generate the html after minification and dev tooling is done
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*/
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compiler.webpack.Compilation.PROCESS_ASSETS_STAGE_OPTIMIZE_INLINE
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},
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/**
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* Hook into the process assets hook
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* @param {any} _
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* @param {(err?: Error) => void} callback
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*/
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(_, callback) => {
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this.generateHTML(compiler, compilation, filename, childCompilerPlugin, previousEmittedAssets, assetJson, callback);
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});
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});
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});
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});
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}
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/**
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* Helper to return the absolute template path with a fallback loader
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*
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* @private
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* @param {string} template The path to the template e.g. './index.html'
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* @param {string} context The webpack base resolution path for relative paths e.g. process.cwd()
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*/
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getTemplatePath (template, context) {
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if (template === 'auto') {
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template = path.resolve(context, 'src/index.ejs');
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if (!fs.existsSync(template)) {
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template = path.join(__dirname, 'default_index.ejs');
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}
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}
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// If the template doesn't use a loader use the lodash template loader
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if (template.indexOf('!') === -1) {
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template = require.resolve('./lib/loader.js') + '!' + path.resolve(context, template);
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}
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// Resolve template path
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return template.replace(
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/([!])([^/\\][^!?]+|[^/\\!?])($|\?[^!?\n]+$)/,
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(match, prefix, filepath, postfix) => prefix + path.resolve(filepath) + postfix);
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}
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/**
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* Return all chunks from the compilation result which match the exclude and include filters
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*
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* @private
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* @param {any} chunks
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* @param {string[]|'all'} includedChunks
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* @param {string[]} excludedChunks
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*/
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filterEntryChunks (chunks, includedChunks, excludedChunks) {
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return chunks.filter(chunkName => {
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// Skip if the chunks should be filtered and the given chunk was not added explicity
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if (Array.isArray(includedChunks) && includedChunks.indexOf(chunkName) === -1) {
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return false;
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}
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// Skip if the chunks should be filtered and the given chunk was excluded explicity
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if (Array.isArray(excludedChunks) && excludedChunks.indexOf(chunkName) !== -1) {
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return false;
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}
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// Add otherwise
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return true;
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});
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}
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/**
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* Helper to sort chunks
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*
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* @private
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* @param {string[]} entryNames
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* @param {string|((entryNameA: string, entryNameB: string) => number)} sortMode
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* @param {Compilation} compilation
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*/
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sortEntryChunks (entryNames, sortMode, compilation) {
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// Custom function
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if (typeof sortMode === 'function') {
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return entryNames.sort(sortMode);
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}
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// Check if the given sort mode is a valid chunkSorter sort mode
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if (typeof chunkSorter[sortMode] !== 'undefined') {
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return chunkSorter[sortMode](entryNames, compilation, this.options);
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}
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throw new Error('"' + sortMode + '" is not a valid chunk sort mode');
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}
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/**
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* Encode each path component using `encodeURIComponent` as files can contain characters
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* which needs special encoding in URLs like `+ `.
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*
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* Valid filesystem characters which need to be encoded for urls:
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*
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* # pound, % percent, & ampersand, { left curly bracket, } right curly bracket,
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* \ back slash, < left angle bracket, > right angle bracket, * asterisk, ? question mark,
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* blank spaces, $ dollar sign, ! exclamation point, ' single quotes, " double quotes,
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* : colon, @ at sign, + plus sign, ` backtick, | pipe, = equal sign
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*
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* However the query string must not be encoded:
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*
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* fo:demonstration-path/very fancy+name.js?path=/home?value=abc&value=def#zzz
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* ^ ^ ^ ^ ^ ^ ^ ^^ ^ ^ ^ ^ ^
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* | | | | | | | || | | | | |
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* encoded | | encoded | | || | | | | |
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* ignored ignored ignored ignored ignored
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*
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* @private
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* @param {string} filePath
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*/
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urlencodePath (filePath) {
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// People use the filepath in quite unexpected ways.
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// Try to extract the first querystring of the url:
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//
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// some+path/demo.html?value=abc?def
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//
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const queryStringStart = filePath.indexOf('?');
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const urlPath = queryStringStart === -1 ? filePath : filePath.substr(0, queryStringStart);
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const queryString = filePath.substr(urlPath.length);
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// Encode all parts except '/' which are not part of the querystring:
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const encodedUrlPath = urlPath.split('/').map(encodeURIComponent).join('/');
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return encodedUrlPath + queryString;
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}
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/**
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* Appends a cache busting hash to the query string of the url
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* E.g. http://localhost:8080/ -> http://localhost:8080/?50c9096ba6183fd728eeb065a26ec175
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*
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* @private
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* @param {string} url
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* @param {string} hash
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*/
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appendHash (url, hash) {
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if (!url) {
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return url;
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}
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return url + (url.indexOf('?') === -1 ? '?' : '&') + hash;
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}
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/**
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* Generate the relative or absolute base url to reference images, css, and javascript files
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* from within the html file - the publicPath
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*
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* @private
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* @param {Compilation} compilation
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* @param {string} filename
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* @param {string | 'auto'} customPublicPath
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* @returns {string}
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*/
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getPublicPath (compilation, filename, customPublicPath) {
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/**
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* @type {string} the configured public path to the asset root
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* if a path publicPath is set in the current webpack config use it otherwise
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* fallback to a relative path
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*/
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const webpackPublicPath = compilation.getAssetPath(compilation.outputOptions.publicPath, { hash: compilation.hash });
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// Webpack 5 introduced "auto" as default value
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const isPublicPathDefined = webpackPublicPath !== 'auto';
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let publicPath =
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// If the html-webpack-plugin options contain a custom public path uset it
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customPublicPath !== 'auto'
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? customPublicPath
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: (isPublicPathDefined
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// If a hard coded public path exists use it
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? webpackPublicPath
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// If no public path was set get a relative url path
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: path.relative(path.resolve(compilation.options.output.path, path.dirname(filename)), compilation.options.output.path)
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.split(path.sep).join('/')
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);
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if (publicPath.length && publicPath.substr(-1, 1) !== '/') {
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publicPath += '/';
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}
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return publicPath;
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}
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/**
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* The getAssetsForHTML extracts the asset information of a webpack compilation for all given entry names.
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*
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* @private
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* @param {Compilation} compilation
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* @param {string} outputName
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* @param {string[]} entryNames
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* @returns {AssetsInformationByGroups}
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*/
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getAssetsInformationByGroups (compilation, outputName, entryNames) {
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/** The public path used inside the html file */
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const publicPath = this.getPublicPath(compilation, outputName, this.options.publicPath);
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/**
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* @type {AssetsInformationByGroups}
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*/
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const assets = {
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// The public path
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publicPath,
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// Will contain all js and mjs files
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js: [],
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// Will contain all css files
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css: [],
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// Will contain the html5 appcache manifest files if it exists
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manifest: Object.keys(compilation.assets).find(assetFile => path.extname(assetFile) === '.appcache'),
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// Favicon
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favicon: undefined
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};
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// Append a hash for cache busting
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if (this.options.hash && assets.manifest) {
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assets.manifest = this.appendHash(assets.manifest, /** @type {string} */ (compilation.hash));
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}
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// Extract paths to .js, .mjs and .css files from the current compilation
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const entryPointPublicPathMap = {};
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const extensionRegexp = /\.(css|js|mjs)(\?|$)/;
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for (let i = 0; i < entryNames.length; i++) {
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const entryName = entryNames[i];
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/** entryPointUnfilteredFiles - also includes hot module update files */
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const entryPointUnfilteredFiles = compilation.entrypoints.get(entryName).getFiles();
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const entryPointFiles = entryPointUnfilteredFiles.filter((chunkFile) => {
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const asset = compilation.getAsset(chunkFile);
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if (!asset) {
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return true;
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}
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// Prevent hot-module files from being included:
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const assetMetaInformation = asset.info || {};
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return !(assetMetaInformation.hotModuleReplacement || assetMetaInformation.development);
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});
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// Prepend the publicPath and append the hash depending on the
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// webpack.output.publicPath and hashOptions
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// E.g. bundle.js -> /bundle.js?hash
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const entryPointPublicPaths = entryPointFiles
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.map(chunkFile => {
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const entryPointPublicPath = publicPath + this.urlencodePath(chunkFile);
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return this.options.hash
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? this.appendHash(entryPointPublicPath, compilation.hash)
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: entryPointPublicPath;
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});
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entryPointPublicPaths.forEach((entryPointPublicPath) => {
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const extMatch = extensionRegexp.exec(entryPointPublicPath);
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// Skip if the public path is not a .css, .mjs or .js file
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if (!extMatch) {
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return;
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}
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// Skip if this file is already known
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// (e.g. because of common chunk optimizations)
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if (entryPointPublicPathMap[entryPointPublicPath]) {
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return;
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}
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entryPointPublicPathMap[entryPointPublicPath] = true;
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// ext will contain .js or .css, because .mjs recognizes as .js
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const ext = extMatch[1] === 'mjs' ? 'js' : extMatch[1];
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assets[ext].push(entryPointPublicPath);
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});
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}
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return assets;
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}
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/**
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* Once webpack is done with compiling the template into a NodeJS code this function
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* evaluates it to generate the html result
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*
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* The evaluateCompilationResult is only a class function to allow spying during testing.
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* Please change that in a further refactoring
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*
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* @param {string} source
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* @param {string} publicPath
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* @param {string} templateFilename
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* @returns {Promise<string | (() => string | Promise<string>)>}
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*/
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evaluateCompilationResult (source, publicPath, templateFilename) {
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if (!source) {
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return Promise.reject(new Error('The child compilation didn\'t provide a result'));
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}
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// The LibraryTemplatePlugin stores the template result in a local variable.
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// By adding it to the end the value gets extracted during evaluation
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if (source.indexOf('HTML_WEBPACK_PLUGIN_RESULT') >= 0) {
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source += ';\nHTML_WEBPACK_PLUGIN_RESULT';
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}
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const templateWithoutLoaders = templateFilename.replace(/^.+!/, '').replace(/\?.+$/, '');
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const vmContext = vm.createContext({
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...global,
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HTML_WEBPACK_PLUGIN: true,
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require: require,
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htmlWebpackPluginPublicPath: publicPath,
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__filename: templateWithoutLoaders,
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__dirname: path.dirname(templateWithoutLoaders),
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AbortController: global.AbortController,
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AbortSignal: global.AbortSignal,
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Blob: global.Blob,
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Buffer: global.Buffer,
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ByteLengthQueuingStrategy: global.ByteLengthQueuingStrategy,
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BroadcastChannel: global.BroadcastChannel,
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CompressionStream: global.CompressionStream,
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CountQueuingStrategy: global.CountQueuingStrategy,
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Crypto: global.Crypto,
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CryptoKey: global.CryptoKey,
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CustomEvent: global.CustomEvent,
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DecompressionStream: global.DecompressionStream,
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Event: global.Event,
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EventTarget: global.EventTarget,
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File: global.File,
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FormData: global.FormData,
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Headers: global.Headers,
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MessageChannel: global.MessageChannel,
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MessageEvent: global.MessageEvent,
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MessagePort: global.MessagePort,
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PerformanceEntry: global.PerformanceEntry,
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PerformanceMark: global.PerformanceMark,
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PerformanceMeasure: global.PerformanceMeasure,
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PerformanceObserver: global.PerformanceObserver,
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PerformanceObserverEntryList: global.PerformanceObserverEntryList,
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PerformanceResourceTiming: global.PerformanceResourceTiming,
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ReadableByteStreamController: global.ReadableByteStreamController,
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ReadableStream: global.ReadableStream,
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ReadableStreamBYOBReader: global.ReadableStreamBYOBReader,
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ReadableStreamBYOBRequest: global.ReadableStreamBYOBRequest,
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ReadableStreamDefaultController: global.ReadableStreamDefaultController,
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ReadableStreamDefaultReader: global.ReadableStreamDefaultReader,
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Response: global.Response,
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Request: global.Request,
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SubtleCrypto: global.SubtleCrypto,
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DOMException: global.DOMException,
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TextDecoder: global.TextDecoder,
|
|
TextDecoderStream: global.TextDecoderStream,
|
|
TextEncoder: global.TextEncoder,
|
|
TextEncoderStream: global.TextEncoderStream,
|
|
TransformStream: global.TransformStream,
|
|
TransformStreamDefaultController: global.TransformStreamDefaultController,
|
|
URL: global.URL,
|
|
URLSearchParams: global.URLSearchParams,
|
|
WebAssembly: global.WebAssembly,
|
|
WritableStream: global.WritableStream,
|
|
WritableStreamDefaultController: global.WritableStreamDefaultController,
|
|
WritableStreamDefaultWriter: global.WritableStreamDefaultWriter
|
|
});
|
|
|
|
const vmScript = new vm.Script(source, { filename: templateWithoutLoaders });
|
|
|
|
// Evaluate code and cast to string
|
|
let newSource;
|
|
|
|
try {
|
|
newSource = vmScript.runInContext(vmContext);
|
|
} catch (e) {
|
|
return Promise.reject(e);
|
|
}
|
|
|
|
if (typeof newSource === 'object' && newSource.__esModule && newSource.default) {
|
|
newSource = newSource.default;
|
|
}
|
|
|
|
return typeof newSource === 'string' || typeof newSource === 'function'
|
|
? Promise.resolve(newSource)
|
|
: Promise.reject(new Error('The loader "' + templateWithoutLoaders + '" didn\'t return html.'));
|
|
}
|
|
|
|
/**
|
|
* Add toString methods for easier rendering inside the template
|
|
*
|
|
* @private
|
|
* @param {Array<HtmlTagObject>} assetTagGroup
|
|
* @returns {Array<HtmlTagObject>}
|
|
*/
|
|
prepareAssetTagGroupForRendering (assetTagGroup) {
|
|
const xhtml = this.options.xhtml;
|
|
return HtmlTagArray.from(assetTagGroup.map((assetTag) => {
|
|
const copiedAssetTag = Object.assign({}, assetTag);
|
|
copiedAssetTag.toString = function () {
|
|
return htmlTagObjectToString(this, xhtml);
|
|
};
|
|
return copiedAssetTag;
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* Generate the template parameters for the template function
|
|
*
|
|
* @private
|
|
* @param {Compilation} compilation
|
|
* @param {AssetsInformationByGroups} assetsInformationByGroups
|
|
* @param {{
|
|
headTags: HtmlTagObject[],
|
|
bodyTags: HtmlTagObject[]
|
|
}} assetTags
|
|
* @returns {Promise<{[key: any]: any}>}
|
|
*/
|
|
getTemplateParameters (compilation, assetsInformationByGroups, assetTags) {
|
|
const templateParameters = this.options.templateParameters;
|
|
|
|
if (templateParameters === false) {
|
|
return Promise.resolve({});
|
|
}
|
|
|
|
if (typeof templateParameters !== 'function' && typeof templateParameters !== 'object') {
|
|
throw new Error('templateParameters has to be either a function or an object');
|
|
}
|
|
|
|
const templateParameterFunction = typeof templateParameters === 'function'
|
|
// A custom function can overwrite the entire template parameter preparation
|
|
? templateParameters
|
|
// If the template parameters is an object merge it with the default values
|
|
: (compilation, assetsInformationByGroups, assetTags, options) => Object.assign({},
|
|
templateParametersGenerator(compilation, assetsInformationByGroups, assetTags, options),
|
|
templateParameters
|
|
);
|
|
const preparedAssetTags = {
|
|
headTags: this.prepareAssetTagGroupForRendering(assetTags.headTags),
|
|
bodyTags: this.prepareAssetTagGroupForRendering(assetTags.bodyTags)
|
|
};
|
|
return Promise
|
|
.resolve()
|
|
.then(() => templateParameterFunction(compilation, assetsInformationByGroups, preparedAssetTags, this.options));
|
|
}
|
|
|
|
/**
|
|
* This function renders the actual html by executing the template function
|
|
*
|
|
* @private
|
|
* @param {(templateParameters) => string | Promise<string>} templateFunction
|
|
* @param {AssetsInformationByGroups} assetsInformationByGroups
|
|
* @param {{
|
|
headTags: HtmlTagObject[],
|
|
bodyTags: HtmlTagObject[]
|
|
}} assetTags
|
|
* @param {Compilation} compilation
|
|
* @returns Promise<string>
|
|
*/
|
|
executeTemplate (templateFunction, assetsInformationByGroups, assetTags, compilation) {
|
|
// Template processing
|
|
const templateParamsPromise = this.getTemplateParameters(compilation, assetsInformationByGroups, assetTags);
|
|
|
|
return templateParamsPromise.then((templateParams) => {
|
|
try {
|
|
// If html is a promise return the promise
|
|
// If html is a string turn it into a promise
|
|
return templateFunction(templateParams);
|
|
} catch (e) {
|
|
compilation.errors.push(new Error('Template execution failed: ' + e));
|
|
return Promise.reject(e);
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Html Post processing
|
|
*
|
|
* @private
|
|
* @param {Compiler} compiler The compiler instance
|
|
* @param {any} originalHtml The input html
|
|
* @param {AssetsInformationByGroups} assetsInformationByGroups
|
|
* @param {{headTags: HtmlTagObject[], bodyTags: HtmlTagObject[]}} assetTags The asset tags to inject
|
|
* @returns {Promise<string>}
|
|
*/
|
|
postProcessHtml (compiler, originalHtml, assetsInformationByGroups, assetTags) {
|
|
let html = originalHtml;
|
|
|
|
if (typeof html !== 'string') {
|
|
return Promise.reject(new Error('Expected html to be a string but got ' + JSON.stringify(html)));
|
|
}
|
|
|
|
if (this.options.inject) {
|
|
const htmlRegExp = /(<html[^>]*>)/i;
|
|
const headRegExp = /(<\/head\s*>)/i;
|
|
const bodyRegExp = /(<\/body\s*>)/i;
|
|
const metaViewportRegExp = /<meta[^>]+name=["']viewport["'][^>]*>/i;
|
|
const body = assetTags.bodyTags.map((assetTagObject) => htmlTagObjectToString(assetTagObject, this.options.xhtml));
|
|
const head = assetTags.headTags.filter((item) => {
|
|
if (item.tagName === 'meta' && item.attributes && item.attributes.name === 'viewport' && metaViewportRegExp.test(html)) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}).map((assetTagObject) => htmlTagObjectToString(assetTagObject, this.options.xhtml));
|
|
|
|
if (body.length) {
|
|
if (bodyRegExp.test(html)) {
|
|
// Append assets to body element
|
|
html = html.replace(bodyRegExp, match => body.join('') + match);
|
|
} else {
|
|
// Append scripts to the end of the file if no <body> element exists:
|
|
html += body.join('');
|
|
}
|
|
}
|
|
|
|
if (head.length) {
|
|
// Create a head tag if none exists
|
|
if (!headRegExp.test(html)) {
|
|
if (!htmlRegExp.test(html)) {
|
|
html = '<head></head>' + html;
|
|
} else {
|
|
html = html.replace(htmlRegExp, match => match + '<head></head>');
|
|
}
|
|
}
|
|
|
|
// Append assets to head element
|
|
html = html.replace(headRegExp, match => head.join('') + match);
|
|
}
|
|
|
|
// Inject manifest into the opening html tag
|
|
if (assetsInformationByGroups.manifest) {
|
|
html = html.replace(/(<html[^>]*)(>)/i, (match, start, end) => {
|
|
// Append the manifest only if no manifest was specified
|
|
if (/\smanifest\s*=/.test(match)) {
|
|
return match;
|
|
}
|
|
return start + ' manifest="' + assetsInformationByGroups.manifest + '"' + end;
|
|
});
|
|
}
|
|
}
|
|
|
|
// TODO avoid this logic and use https://github.com/webpack-contrib/html-minimizer-webpack-plugin under the hood in the next major version
|
|
// Check if webpack is running in production mode
|
|
// @see https://github.com/webpack/webpack/blob/3366421f1784c449f415cda5930a8e445086f688/lib/WebpackOptionsDefaulter.js#L12-L14
|
|
const isProductionLikeMode = compiler.options.mode === 'production' || !compiler.options.mode;
|
|
const needMinify = this.options.minify === true || typeof this.options.minify === 'object' || (this.options.minify === 'auto' && isProductionLikeMode);
|
|
|
|
if (!needMinify) {
|
|
return Promise.resolve(html);
|
|
}
|
|
|
|
const minifyOptions = typeof this.options.minify === 'object'
|
|
? this.options.minify
|
|
: {
|
|
// https://www.npmjs.com/package/html-minifier-terser#options-quick-reference
|
|
collapseWhitespace: true,
|
|
keepClosingSlash: true,
|
|
removeComments: true,
|
|
removeRedundantAttributes: true,
|
|
removeScriptTypeAttributes: true,
|
|
removeStyleLinkTypeAttributes: true,
|
|
useShortDoctype: true
|
|
};
|
|
|
|
try {
|
|
html = require('html-minifier-terser').minify(html, minifyOptions);
|
|
} catch (e) {
|
|
const isParseError = String(e.message).indexOf('Parse Error') === 0;
|
|
|
|
if (isParseError) {
|
|
e.message = 'html-webpack-plugin could not minify the generated output.\n' +
|
|
'In production mode the html minifcation is enabled by default.\n' +
|
|
'If you are not generating a valid html output please disable it manually.\n' +
|
|
'You can do so by adding the following setting to your HtmlWebpackPlugin config:\n|\n|' +
|
|
' minify: false\n|\n' +
|
|
'See https://github.com/jantimon/html-webpack-plugin#options for details.\n\n' +
|
|
'For parser dedicated bugs please create an issue here:\n' +
|
|
'https://danielruf.github.io/html-minifier-terser/' +
|
|
'\n' + e.message;
|
|
}
|
|
|
|
return Promise.reject(e);
|
|
}
|
|
|
|
return Promise.resolve(html);
|
|
}
|
|
|
|
/**
|
|
* Helper to return a sorted unique array of all asset files out of the asset object
|
|
* @private
|
|
*/
|
|
getAssetFiles (assets) {
|
|
const files = _.uniq(Object.keys(assets).filter(assetType => assetType !== 'chunks' && assets[assetType]).reduce((files, assetType) => files.concat(assets[assetType]), []));
|
|
files.sort();
|
|
return files;
|
|
}
|
|
|
|
/**
|
|
* Converts a favicon file from disk to a webpack resource and returns the url to the resource
|
|
*
|
|
* @private
|
|
* @param {Compiler} compiler
|
|
* @param {string|false} favicon
|
|
* @param {Compilation} compilation
|
|
* @param {string} publicPath
|
|
* @param {PreviousEmittedAssets} previousEmittedAssets
|
|
* @returns {Promise<string|undefined>}
|
|
*/
|
|
generateFavicon (compiler, favicon, compilation, publicPath, previousEmittedAssets) {
|
|
if (!favicon) {
|
|
return Promise.resolve(undefined);
|
|
}
|
|
|
|
const filename = path.resolve(compilation.compiler.context, favicon);
|
|
|
|
return promisify(compilation.inputFileSystem.readFile)(filename)
|
|
.then((buf) => {
|
|
const source = new compiler.webpack.sources.RawSource(/** @type {string | Buffer} */ (buf), false);
|
|
const name = path.basename(filename);
|
|
|
|
compilation.fileDependencies.add(filename);
|
|
compilation.emitAsset(name, source);
|
|
previousEmittedAssets.push({ name, source });
|
|
|
|
const faviconPath = publicPath + name;
|
|
|
|
if (this.options.hash) {
|
|
return this.appendHash(faviconPath, /** @type {string} */ (compilation.hash));
|
|
}
|
|
|
|
return faviconPath;
|
|
})
|
|
.catch(() => Promise.reject(new Error('HtmlWebpackPlugin: could not load file ' + filename)));
|
|
}
|
|
|
|
/**
|
|
* Generate all tags script for the given file paths
|
|
*
|
|
* @private
|
|
* @param {Array<string>} jsAssets
|
|
* @returns {Array<HtmlTagObject>}
|
|
*/
|
|
generatedScriptTags (jsAssets) {
|
|
// @ts-ignore
|
|
return jsAssets.map(src => {
|
|
const attributes = {};
|
|
|
|
if (this.options.scriptLoading === 'defer') {
|
|
attributes.defer = true;
|
|
} else if (this.options.scriptLoading === 'module') {
|
|
attributes.type = 'module';
|
|
} else if (this.options.scriptLoading === 'systemjs-module') {
|
|
attributes.type = 'systemjs-module';
|
|
}
|
|
|
|
attributes.src = src;
|
|
|
|
return {
|
|
tagName: 'script',
|
|
voidTag: false,
|
|
meta: { plugin: 'html-webpack-plugin' },
|
|
attributes
|
|
};
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Generate all style tags for the given file paths
|
|
*
|
|
* @private
|
|
* @param {Array<string>} cssAssets
|
|
* @returns {Array<HtmlTagObject>}
|
|
*/
|
|
generateStyleTags (cssAssets) {
|
|
return cssAssets.map(styleAsset => ({
|
|
tagName: 'link',
|
|
voidTag: true,
|
|
meta: { plugin: 'html-webpack-plugin' },
|
|
attributes: {
|
|
href: styleAsset,
|
|
rel: 'stylesheet'
|
|
}
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* Generate an optional base tag
|
|
*
|
|
* @param {string | {[attributeName: string]: string}} base
|
|
* @returns {Array<HtmlTagObject>}
|
|
*/
|
|
generateBaseTag (base) {
|
|
return [{
|
|
tagName: 'base',
|
|
voidTag: true,
|
|
meta: { plugin: 'html-webpack-plugin' },
|
|
// attributes e.g. { href:"http://example.com/page.html" target:"_blank" }
|
|
attributes: typeof base === 'string' ? {
|
|
href: base
|
|
} : base
|
|
}];
|
|
}
|
|
|
|
/**
|
|
* Generate all meta tags for the given meta configuration
|
|
*
|
|
* @private
|
|
* @param {false | {[name: string]: false | string | {[attributeName: string]: string|boolean}}} metaOptions
|
|
* @returns {Array<HtmlTagObject>}
|
|
*/
|
|
generatedMetaTags (metaOptions) {
|
|
if (metaOptions === false) {
|
|
return [];
|
|
}
|
|
|
|
// Make tags self-closing in case of xhtml
|
|
// Turn { "viewport" : "width=500, initial-scale=1" } into
|
|
// [{ name:"viewport" content:"width=500, initial-scale=1" }]
|
|
const metaTagAttributeObjects = Object.keys(metaOptions)
|
|
.map((metaName) => {
|
|
const metaTagContent = metaOptions[metaName];
|
|
return (typeof metaTagContent === 'string') ? {
|
|
name: metaName,
|
|
content: metaTagContent
|
|
} : metaTagContent;
|
|
})
|
|
.filter((attribute) => attribute !== false);
|
|
|
|
// Turn [{ name:"viewport" content:"width=500, initial-scale=1" }] into
|
|
// the html-webpack-plugin tag structure
|
|
return metaTagAttributeObjects.map((metaTagAttributes) => {
|
|
if (metaTagAttributes === false) {
|
|
throw new Error('Invalid meta tag');
|
|
}
|
|
return {
|
|
tagName: 'meta',
|
|
voidTag: true,
|
|
meta: { plugin: 'html-webpack-plugin' },
|
|
attributes: metaTagAttributes
|
|
};
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Generate a favicon tag for the given file path
|
|
*
|
|
* @private
|
|
* @param {string} favicon
|
|
* @returns {Array<HtmlTagObject>}
|
|
*/
|
|
generateFaviconTag (favicon) {
|
|
return [{
|
|
tagName: 'link',
|
|
voidTag: true,
|
|
meta: { plugin: 'html-webpack-plugin' },
|
|
attributes: {
|
|
rel: 'icon',
|
|
href: favicon
|
|
}
|
|
}];
|
|
}
|
|
|
|
/**
|
|
* Group assets to head and body tags
|
|
*
|
|
* @param {{
|
|
scripts: Array<HtmlTagObject>;
|
|
styles: Array<HtmlTagObject>;
|
|
meta: Array<HtmlTagObject>;
|
|
}} assetTags
|
|
* @param {"body" | "head"} scriptTarget
|
|
* @returns {{
|
|
headTags: Array<HtmlTagObject>;
|
|
bodyTags: Array<HtmlTagObject>;
|
|
}}
|
|
*/
|
|
groupAssetsByElements (assetTags, scriptTarget) {
|
|
/** @type {{ headTags: Array<HtmlTagObject>; bodyTags: Array<HtmlTagObject>; }} */
|
|
const result = {
|
|
headTags: [
|
|
...assetTags.meta,
|
|
...assetTags.styles
|
|
],
|
|
bodyTags: []
|
|
};
|
|
|
|
// Add script tags to head or body depending on
|
|
// the htmlPluginOptions
|
|
if (scriptTarget === 'body') {
|
|
result.bodyTags.push(...assetTags.scripts);
|
|
} else {
|
|
// If script loading is blocking add the scripts to the end of the head
|
|
// If script loading is non-blocking add the scripts in front of the css files
|
|
const insertPosition = this.options.scriptLoading === 'blocking' ? result.headTags.length : assetTags.meta.length;
|
|
|
|
result.headTags.splice(insertPosition, 0, ...assetTags.scripts);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Replace [contenthash] in filename
|
|
*
|
|
* @see https://survivejs.com/webpack/optimizing/adding-hashes-to-filenames/
|
|
*
|
|
* @private
|
|
* @param {Compiler} compiler
|
|
* @param {string} filename
|
|
* @param {string|Buffer} fileContent
|
|
* @param {Compilation} compilation
|
|
* @returns {{ path: string, info: {} }}
|
|
*/
|
|
replacePlaceholdersInFilename (compiler, filename, fileContent, compilation) {
|
|
if (/\[\\*([\w:]+)\\*\]/i.test(filename) === false) {
|
|
return { path: filename, info: {} };
|
|
}
|
|
|
|
const hash = compiler.webpack.util.createHash(compilation.outputOptions.hashFunction);
|
|
|
|
hash.update(fileContent);
|
|
|
|
if (compilation.outputOptions.hashSalt) {
|
|
hash.update(compilation.outputOptions.hashSalt);
|
|
}
|
|
|
|
const contentHash = hash.digest(compilation.outputOptions.hashDigest).slice(0, compilation.outputOptions.hashDigestLength);
|
|
|
|
return compilation.getPathWithInfo(
|
|
filename,
|
|
{
|
|
contentHash,
|
|
chunk: {
|
|
hash: contentHash,
|
|
contentHash
|
|
}
|
|
}
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Function to generate HTML file.
|
|
*
|
|
* @private
|
|
* @param {Compiler} compiler
|
|
* @param {Compilation} compilation
|
|
* @param {string} outputName
|
|
* @param {CachedChildCompilation} childCompilerPlugin
|
|
* @param {PreviousEmittedAssets} previousEmittedAssets
|
|
* @param {{ value: string | undefined }} assetJson
|
|
* @param {(err?: Error) => void} callback
|
|
*/
|
|
generateHTML (
|
|
compiler,
|
|
compilation,
|
|
outputName,
|
|
childCompilerPlugin,
|
|
previousEmittedAssets,
|
|
assetJson,
|
|
callback
|
|
) {
|
|
// Get all entry point names for this html file
|
|
const entryNames = Array.from(compilation.entrypoints.keys());
|
|
const filteredEntryNames = this.filterEntryChunks(entryNames, this.options.chunks, this.options.excludeChunks);
|
|
const sortedEntryNames = this.sortEntryChunks(filteredEntryNames, this.options.chunksSortMode, compilation);
|
|
const templateResult = this.options.templateContent
|
|
? { mainCompilationHash: compilation.hash }
|
|
: childCompilerPlugin.getCompilationEntryResult(this.options.template);
|
|
|
|
if ('error' in templateResult) {
|
|
compilation.errors.push(prettyError(templateResult.error, compiler.context).toString());
|
|
}
|
|
|
|
// If the child compilation was not executed during a previous main compile run
|
|
// it is a cached result
|
|
const isCompilationCached = templateResult.mainCompilationHash !== compilation.hash;
|
|
/** Generated file paths from the entry point names */
|
|
const assetsInformationByGroups = this.getAssetsInformationByGroups(compilation, outputName, sortedEntryNames);
|
|
// If the template and the assets did not change we don't have to emit the html
|
|
const newAssetJson = JSON.stringify(this.getAssetFiles(assetsInformationByGroups));
|
|
|
|
if (isCompilationCached && this.options.cache && assetJson.value === newAssetJson) {
|
|
previousEmittedAssets.forEach(({ name, source, info }) => {
|
|
compilation.emitAsset(name, source, info);
|
|
});
|
|
return callback();
|
|
} else {
|
|
previousEmittedAssets.length = 0;
|
|
assetJson.value = newAssetJson;
|
|
}
|
|
|
|
// The html-webpack plugin uses a object representation for the html-tags which will be injected
|
|
// to allow altering them more easily
|
|
// Just before they are converted a third-party-plugin author might change the order and content
|
|
const assetsPromise = this.generateFavicon(compiler, this.options.favicon, compilation, assetsInformationByGroups.publicPath, previousEmittedAssets)
|
|
.then((faviconPath) => {
|
|
assetsInformationByGroups.favicon = faviconPath;
|
|
return getHtmlWebpackPluginHooks(compilation).beforeAssetTagGeneration.promise({
|
|
assets: assetsInformationByGroups,
|
|
outputName,
|
|
plugin: this
|
|
});
|
|
});
|
|
|
|
// Turn the js and css paths into grouped HtmlTagObjects
|
|
const assetTagGroupsPromise = assetsPromise
|
|
// And allow third-party-plugin authors to reorder and change the assetTags before they are grouped
|
|
.then(({ assets }) => getHtmlWebpackPluginHooks(compilation).alterAssetTags.promise({
|
|
assetTags: {
|
|
scripts: this.generatedScriptTags(assets.js),
|
|
styles: this.generateStyleTags(assets.css),
|
|
meta: [
|
|
...(this.options.base !== false ? this.generateBaseTag(this.options.base) : []),
|
|
...this.generatedMetaTags(this.options.meta),
|
|
...(assets.favicon ? this.generateFaviconTag(assets.favicon) : [])
|
|
]
|
|
},
|
|
outputName,
|
|
publicPath: assetsInformationByGroups.publicPath,
|
|
plugin: this
|
|
}))
|
|
.then(({ assetTags }) => {
|
|
// Inject scripts to body unless it set explicitly to head
|
|
const scriptTarget = this.options.inject === 'head' ||
|
|
(this.options.inject !== 'body' && this.options.scriptLoading !== 'blocking') ? 'head' : 'body';
|
|
// Group assets to `head` and `body` tag arrays
|
|
const assetGroups = this.groupAssetsByElements(assetTags, scriptTarget);
|
|
// Allow third-party-plugin authors to reorder and change the assetTags once they are grouped
|
|
return getHtmlWebpackPluginHooks(compilation).alterAssetTagGroups.promise({
|
|
headTags: assetGroups.headTags,
|
|
bodyTags: assetGroups.bodyTags,
|
|
outputName,
|
|
publicPath: assetsInformationByGroups.publicPath,
|
|
plugin: this
|
|
});
|
|
});
|
|
|
|
// Turn the compiled template into a nodejs function or into a nodejs string
|
|
const templateEvaluationPromise = Promise.resolve()
|
|
.then(() => {
|
|
if ('error' in templateResult) {
|
|
return this.options.showErrors ? prettyError(templateResult.error, compiler.context).toHtml() : 'ERROR';
|
|
}
|
|
|
|
// Allow to use a custom function / string instead
|
|
if (this.options.templateContent !== false) {
|
|
return this.options.templateContent;
|
|
}
|
|
|
|
// Once everything is compiled evaluate the html factory and replace it with its content
|
|
if ('compiledEntry' in templateResult) {
|
|
const compiledEntry = templateResult.compiledEntry;
|
|
const assets = compiledEntry.assets;
|
|
|
|
// Store assets from child compiler to reemit them later
|
|
for (const name in assets) {
|
|
previousEmittedAssets.push({ name, source: assets[name].source, info: assets[name].info });
|
|
}
|
|
|
|
return this.evaluateCompilationResult(compiledEntry.content, assetsInformationByGroups.publicPath, this.options.template);
|
|
}
|
|
|
|
return Promise.reject(new Error('Child compilation contained no compiledEntry'));
|
|
});
|
|
const templateExectutionPromise = Promise.all([assetsPromise, assetTagGroupsPromise, templateEvaluationPromise])
|
|
// Execute the template
|
|
.then(([assetsHookResult, assetTags, compilationResult]) => typeof compilationResult !== 'function'
|
|
? compilationResult
|
|
: this.executeTemplate(compilationResult, assetsHookResult.assets, { headTags: assetTags.headTags, bodyTags: assetTags.bodyTags }, compilation));
|
|
|
|
const injectedHtmlPromise = Promise.all([assetTagGroupsPromise, templateExectutionPromise])
|
|
// Allow plugins to change the html before assets are injected
|
|
.then(([assetTags, html]) => {
|
|
const pluginArgs = { html, headTags: assetTags.headTags, bodyTags: assetTags.bodyTags, plugin: this, outputName };
|
|
return getHtmlWebpackPluginHooks(compilation).afterTemplateExecution.promise(pluginArgs);
|
|
})
|
|
.then(({ html, headTags, bodyTags }) => {
|
|
return this.postProcessHtml(compiler, html, assetsInformationByGroups, { headTags, bodyTags });
|
|
});
|
|
|
|
const emitHtmlPromise = injectedHtmlPromise
|
|
// Allow plugins to change the html after assets are injected
|
|
.then((html) => {
|
|
const pluginArgs = { html, plugin: this, outputName };
|
|
return getHtmlWebpackPluginHooks(compilation).beforeEmit.promise(pluginArgs)
|
|
.then(result => result.html);
|
|
})
|
|
.catch(err => {
|
|
// In case anything went wrong the promise is resolved
|
|
// with the error message and an error is logged
|
|
compilation.errors.push(prettyError(err, compiler.context).toString());
|
|
return this.options.showErrors ? prettyError(err, compiler.context).toHtml() : 'ERROR';
|
|
})
|
|
.then(html => {
|
|
const filename = outputName.replace(/\[templatehash([^\]]*)\]/g, require('util').deprecate(
|
|
(match, options) => `[contenthash${options}]`,
|
|
'[templatehash] is now [contenthash]')
|
|
);
|
|
const replacedFilename = this.replacePlaceholdersInFilename(compiler, filename, html, compilation);
|
|
const source = new compiler.webpack.sources.RawSource(html, false);
|
|
|
|
// Add the evaluated html code to the webpack assets
|
|
compilation.emitAsset(replacedFilename.path, source, replacedFilename.info);
|
|
previousEmittedAssets.push({ name: replacedFilename.path, source });
|
|
|
|
return replacedFilename.path;
|
|
})
|
|
.then((finalOutputName) => getHtmlWebpackPluginHooks(compilation).afterEmit.promise({
|
|
outputName: finalOutputName,
|
|
plugin: this
|
|
}).catch(err => {
|
|
/** @type {Logger} */
|
|
(this.logger).error(err);
|
|
return null;
|
|
}).then(() => null));
|
|
|
|
// Once all files are added to the webpack compilation
|
|
// let the webpack compiler continue
|
|
emitHtmlPromise.then(() => {
|
|
callback();
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* The default for options.templateParameter
|
|
* Generate the template parameters
|
|
*
|
|
* Generate the template parameters for the template function
|
|
* @param {Compilation} compilation
|
|
* @param {AssetsInformationByGroups} assets
|
|
* @param {{
|
|
headTags: HtmlTagObject[],
|
|
bodyTags: HtmlTagObject[]
|
|
}} assetTags
|
|
* @param {ProcessedHtmlWebpackOptions} options
|
|
* @returns {TemplateParameter}
|
|
*/
|
|
function templateParametersGenerator (compilation, assets, assetTags, options) {
|
|
return {
|
|
compilation: compilation,
|
|
webpackConfig: compilation.options,
|
|
htmlWebpackPlugin: {
|
|
tags: assetTags,
|
|
files: assets,
|
|
options: options
|
|
}
|
|
};
|
|
}
|
|
|
|
// Statics:
|
|
/**
|
|
* The major version number of this plugin
|
|
*/
|
|
HtmlWebpackPlugin.version = 5;
|
|
|
|
/**
|
|
* A static helper to get the hooks for this plugin
|
|
*
|
|
* Usage: HtmlWebpackPlugin.getHooks(compilation).HOOK_NAME.tapAsync('YourPluginName', () => { ... });
|
|
*/
|
|
HtmlWebpackPlugin.getHooks = getHtmlWebpackPluginHooks;
|
|
HtmlWebpackPlugin.createHtmlTagObject = createHtmlTagObject;
|
|
|
|
module.exports = HtmlWebpackPlugin;
|