692 lines
23 KiB
JavaScript
692 lines
23 KiB
JavaScript
"use strict";
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const path = require("path");
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const os = require("os");
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const {
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validate
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} = require("schema-utils");
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const {
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throttleAll,
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memoize,
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terserMinify,
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uglifyJsMinify,
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swcMinify,
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esbuildMinify
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} = require("./utils");
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const schema = require("./options.json");
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const {
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minify
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} = require("./minify");
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/** @typedef {import("schema-utils/declarations/validate").Schema} Schema */
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/** @typedef {import("webpack").Compiler} Compiler */
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/** @typedef {import("webpack").Compilation} Compilation */
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/** @typedef {import("webpack").WebpackError} WebpackError */
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/** @typedef {import("webpack").Asset} Asset */
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/** @typedef {import("./utils.js").TerserECMA} TerserECMA */
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/** @typedef {import("./utils.js").TerserOptions} TerserOptions */
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/** @typedef {import("jest-worker").Worker} JestWorker */
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/** @typedef {import("@jridgewell/trace-mapping").SourceMapInput} SourceMapInput */
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/** @typedef {import("@jridgewell/trace-mapping").TraceMap} TraceMap */
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/** @typedef {RegExp | string} Rule */
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/** @typedef {Rule[] | Rule} Rules */
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/**
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* @callback ExtractCommentsFunction
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* @param {any} astNode
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* @param {{ value: string, type: 'comment1' | 'comment2' | 'comment3' | 'comment4', pos: number, line: number, col: number }} comment
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* @returns {boolean}
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*/
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/**
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* @typedef {boolean | 'all' | 'some' | RegExp | ExtractCommentsFunction} ExtractCommentsCondition
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*/
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/**
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* @typedef {string | ((fileData: any) => string)} ExtractCommentsFilename
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*/
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/**
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* @typedef {boolean | string | ((commentsFile: string) => string)} ExtractCommentsBanner
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*/
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/**
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* @typedef {Object} ExtractCommentsObject
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* @property {ExtractCommentsCondition} [condition]
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* @property {ExtractCommentsFilename} [filename]
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* @property {ExtractCommentsBanner} [banner]
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*/
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/**
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* @typedef {ExtractCommentsCondition | ExtractCommentsObject} ExtractCommentsOptions
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*/
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/**
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* @typedef {Object} MinimizedResult
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* @property {string} code
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* @property {SourceMapInput} [map]
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* @property {Array<Error | string>} [errors]
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* @property {Array<Error | string>} [warnings]
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* @property {Array<string>} [extractedComments]
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*/
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/**
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* @typedef {{ [file: string]: string }} Input
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*/
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/**
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* @typedef {{ [key: string]: any }} CustomOptions
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*/
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/**
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* @template T
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* @typedef {T extends infer U ? U : CustomOptions} InferDefaultType
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*/
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/**
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* @typedef {Object} PredefinedOptions
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* @property {boolean} [module]
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* @property {TerserECMA} [ecma]
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*/
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/**
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* @template T
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* @typedef {PredefinedOptions & InferDefaultType<T>} MinimizerOptions
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*/
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/**
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* @template T
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* @callback BasicMinimizerImplementation
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* @param {Input} input
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* @param {SourceMapInput | undefined} sourceMap
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* @param {MinimizerOptions<T>} minifyOptions
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* @param {ExtractCommentsOptions | undefined} extractComments
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* @returns {Promise<MinimizedResult>}
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*/
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/**
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* @typedef {object} MinimizeFunctionHelpers
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* @property {() => string | undefined} [getMinimizerVersion]
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*/
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/**
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* @template T
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* @typedef {BasicMinimizerImplementation<T> & MinimizeFunctionHelpers} MinimizerImplementation
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*/
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/**
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* @template T
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* @typedef {Object} InternalOptions
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* @property {string} name
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* @property {string} input
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* @property {SourceMapInput | undefined} inputSourceMap
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* @property {ExtractCommentsOptions | undefined} extractComments
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* @property {{ implementation: MinimizerImplementation<T>, options: MinimizerOptions<T> }} minimizer
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*/
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/**
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* @template T
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* @typedef {JestWorker & { transform: (options: string) => MinimizedResult, minify: (options: InternalOptions<T>) => MinimizedResult }} MinimizerWorker
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*/
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/**
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* @typedef {undefined | boolean | number} Parallel
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*/
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/**
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* @typedef {Object} BasePluginOptions
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* @property {Rules} [test]
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* @property {Rules} [include]
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* @property {Rules} [exclude]
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* @property {ExtractCommentsOptions} [extractComments]
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* @property {Parallel} [parallel]
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*/
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/**
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* @template T
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* @typedef {T extends TerserOptions ? { minify?: MinimizerImplementation<T> | undefined, terserOptions?: MinimizerOptions<T> | undefined } : { minify: MinimizerImplementation<T>, terserOptions?: MinimizerOptions<T> | undefined }} DefinedDefaultMinimizerAndOptions
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*/
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/**
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* @template T
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* @typedef {BasePluginOptions & { minimizer: { implementation: MinimizerImplementation<T>, options: MinimizerOptions<T> } }} InternalPluginOptions
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*/
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const getTraceMapping = memoize(() =>
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// eslint-disable-next-line global-require
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require("@jridgewell/trace-mapping"));
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const getSerializeJavascript = memoize(() =>
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// eslint-disable-next-line global-require
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require("serialize-javascript"));
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/**
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* @template [T=TerserOptions]
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*/
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class TerserPlugin {
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/**
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* @param {BasePluginOptions & DefinedDefaultMinimizerAndOptions<T>} [options]
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*/
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constructor(options) {
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validate( /** @type {Schema} */schema, options || {}, {
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name: "Terser Plugin",
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baseDataPath: "options"
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});
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// TODO make `minimizer` option instead `minify` and `terserOptions` in the next major release, also rename `terserMinify` to `terserMinimize`
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const {
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minify = ( /** @type {MinimizerImplementation<T>} */terserMinify),
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terserOptions = ( /** @type {MinimizerOptions<T>} */{}),
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test = /\.[cm]?js(\?.*)?$/i,
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extractComments = true,
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parallel = true,
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include,
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exclude
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} = options || {};
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/**
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* @private
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* @type {InternalPluginOptions<T>}
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*/
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this.options = {
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test,
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extractComments,
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parallel,
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include,
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exclude,
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minimizer: {
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implementation: minify,
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options: terserOptions
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}
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};
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}
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/**
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* @private
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* @param {any} input
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* @returns {boolean}
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*/
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static isSourceMap(input) {
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// All required options for `new TraceMap(...options)`
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// https://github.com/jridgewell/trace-mapping#usage
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return Boolean(input && input.version && input.sources && Array.isArray(input.sources) && typeof input.mappings === "string");
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}
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/**
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* @private
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* @param {unknown} warning
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* @param {string} file
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* @returns {Error}
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*/
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static buildWarning(warning, file) {
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/**
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* @type {Error & { hideStack: true, file: string }}
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*/
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// @ts-ignore
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const builtWarning = new Error(warning.toString());
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builtWarning.name = "Warning";
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builtWarning.hideStack = true;
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builtWarning.file = file;
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return builtWarning;
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}
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/**
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* @private
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* @param {any} error
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* @param {string} file
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* @param {TraceMap} [sourceMap]
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* @param {Compilation["requestShortener"]} [requestShortener]
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* @returns {Error}
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*/
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static buildError(error, file, sourceMap, requestShortener) {
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/**
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* @type {Error & { file?: string }}
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*/
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let builtError;
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if (typeof error === "string") {
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builtError = new Error(`${file} from Terser plugin\n${error}`);
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builtError.file = file;
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return builtError;
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}
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if (error.line) {
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const original = sourceMap && getTraceMapping().originalPositionFor(sourceMap, {
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line: error.line,
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column: error.col
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});
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if (original && original.source && requestShortener) {
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builtError = new Error(`${file} from Terser plugin\n${error.message} [${requestShortener.shorten(original.source)}:${original.line},${original.column}][${file}:${error.line},${error.col}]${error.stack ? `\n${error.stack.split("\n").slice(1).join("\n")}` : ""}`);
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builtError.file = file;
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return builtError;
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}
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builtError = new Error(`${file} from Terser plugin\n${error.message} [${file}:${error.line},${error.col}]${error.stack ? `\n${error.stack.split("\n").slice(1).join("\n")}` : ""}`);
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builtError.file = file;
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return builtError;
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}
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if (error.stack) {
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builtError = new Error(`${file} from Terser plugin\n${typeof error.message !== "undefined" ? error.message : ""}\n${error.stack}`);
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builtError.file = file;
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return builtError;
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}
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builtError = new Error(`${file} from Terser plugin\n${error.message}`);
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builtError.file = file;
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return builtError;
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}
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/**
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* @private
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* @param {Parallel} parallel
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* @returns {number}
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*/
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static getAvailableNumberOfCores(parallel) {
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// In some cases cpus() returns undefined
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// https://github.com/nodejs/node/issues/19022
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const cpus = os.cpus() || {
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length: 1
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};
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return parallel === true ? cpus.length - 1 : Math.min(Number(parallel) || 0, cpus.length - 1);
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}
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/**
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* @private
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* @param {Compiler} compiler
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* @param {Compilation} compilation
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* @param {Record<string, import("webpack").sources.Source>} assets
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* @param {{availableNumberOfCores: number}} optimizeOptions
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* @returns {Promise<void>}
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*/
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async optimize(compiler, compilation, assets, optimizeOptions) {
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const cache = compilation.getCache("TerserWebpackPlugin");
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let numberOfAssets = 0;
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const assetsForMinify = await Promise.all(Object.keys(assets).filter(name => {
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const {
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info
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} = /** @type {Asset} */compilation.getAsset(name);
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if (
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// Skip double minimize assets from child compilation
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info.minimized ||
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// Skip minimizing for extracted comments assets
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info.extractedComments) {
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return false;
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}
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if (!compiler.webpack.ModuleFilenameHelpers.matchObject.bind(
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// eslint-disable-next-line no-undefined
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undefined, this.options)(name)) {
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return false;
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}
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return true;
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}).map(async name => {
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const {
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info,
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source
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} = /** @type {Asset} */
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compilation.getAsset(name);
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const eTag = cache.getLazyHashedEtag(source);
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const cacheItem = cache.getItemCache(name, eTag);
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const output = await cacheItem.getPromise();
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if (!output) {
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numberOfAssets += 1;
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}
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return {
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name,
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info,
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inputSource: source,
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output,
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cacheItem
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};
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}));
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if (assetsForMinify.length === 0) {
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return;
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}
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/** @type {undefined | (() => MinimizerWorker<T>)} */
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let getWorker;
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/** @type {undefined | MinimizerWorker<T>} */
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let initializedWorker;
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/** @type {undefined | number} */
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let numberOfWorkers;
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if (optimizeOptions.availableNumberOfCores > 0) {
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// Do not create unnecessary workers when the number of files is less than the available cores, it saves memory
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numberOfWorkers = Math.min(numberOfAssets, optimizeOptions.availableNumberOfCores);
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// eslint-disable-next-line consistent-return
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getWorker = () => {
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if (initializedWorker) {
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return initializedWorker;
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}
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// eslint-disable-next-line global-require
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const {
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Worker
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} = require("jest-worker");
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initializedWorker = /** @type {MinimizerWorker<T>} */
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new Worker(require.resolve("./minify"), {
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numWorkers: numberOfWorkers,
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enableWorkerThreads: true
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});
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// https://github.com/facebook/jest/issues/8872#issuecomment-524822081
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const workerStdout = initializedWorker.getStdout();
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if (workerStdout) {
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workerStdout.on("data", chunk => process.stdout.write(chunk));
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}
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const workerStderr = initializedWorker.getStderr();
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if (workerStderr) {
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workerStderr.on("data", chunk => process.stderr.write(chunk));
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}
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return initializedWorker;
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};
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}
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const {
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SourceMapSource,
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ConcatSource,
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RawSource
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} = compiler.webpack.sources;
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/** @typedef {{ extractedCommentsSource : import("webpack").sources.RawSource, commentsFilename: string }} ExtractedCommentsInfo */
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/** @type {Map<string, ExtractedCommentsInfo>} */
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const allExtractedComments = new Map();
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const scheduledTasks = [];
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for (const asset of assetsForMinify) {
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scheduledTasks.push(async () => {
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const {
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name,
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inputSource,
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info,
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cacheItem
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} = asset;
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let {
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output
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} = asset;
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if (!output) {
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let input;
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/** @type {SourceMapInput | undefined} */
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let inputSourceMap;
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const {
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source: sourceFromInputSource,
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map
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} = inputSource.sourceAndMap();
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input = sourceFromInputSource;
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if (map) {
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if (!TerserPlugin.isSourceMap(map)) {
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compilation.warnings.push( /** @type {WebpackError} */
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new Error(`${name} contains invalid source map`));
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} else {
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inputSourceMap = /** @type {SourceMapInput} */map;
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}
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}
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if (Buffer.isBuffer(input)) {
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input = input.toString();
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}
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/**
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* @type {InternalOptions<T>}
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*/
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const options = {
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name,
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input,
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inputSourceMap,
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minimizer: {
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implementation: this.options.minimizer.implementation,
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// @ts-ignore https://github.com/Microsoft/TypeScript/issues/10727
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options: {
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...this.options.minimizer.options
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}
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},
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extractComments: this.options.extractComments
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};
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if (typeof options.minimizer.options.module === "undefined") {
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if (typeof info.javascriptModule !== "undefined") {
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options.minimizer.options.module = info.javascriptModule;
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} else if (/\.mjs(\?.*)?$/i.test(name)) {
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options.minimizer.options.module = true;
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} else if (/\.cjs(\?.*)?$/i.test(name)) {
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options.minimizer.options.module = false;
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}
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}
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if (typeof options.minimizer.options.ecma === "undefined") {
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options.minimizer.options.ecma = TerserPlugin.getEcmaVersion(compiler.options.output.environment || {});
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}
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try {
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output = await (getWorker ? getWorker().transform(getSerializeJavascript()(options)) : minify(options));
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} catch (error) {
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const hasSourceMap = inputSourceMap && TerserPlugin.isSourceMap(inputSourceMap);
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compilation.errors.push( /** @type {WebpackError} */
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TerserPlugin.buildError(error, name, hasSourceMap ? new (getTraceMapping().TraceMap)( /** @type {SourceMapInput} */inputSourceMap) :
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// eslint-disable-next-line no-undefined
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undefined,
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// eslint-disable-next-line no-undefined
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hasSourceMap ? compilation.requestShortener : undefined));
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return;
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}
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if (typeof output.code === "undefined") {
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compilation.errors.push( /** @type {WebpackError} */
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new Error(`${name} from Terser plugin\nMinimizer doesn't return result`));
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return;
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}
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if (output.warnings && output.warnings.length > 0) {
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output.warnings = output.warnings.map(
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/**
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* @param {Error | string} item
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*/
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item => TerserPlugin.buildWarning(item, name));
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}
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if (output.errors && output.errors.length > 0) {
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const hasSourceMap = inputSourceMap && TerserPlugin.isSourceMap(inputSourceMap);
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output.errors = output.errors.map(
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/**
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* @param {Error | string} item
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*/
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item => TerserPlugin.buildError(item, name, hasSourceMap ? new (getTraceMapping().TraceMap)( /** @type {SourceMapInput} */inputSourceMap) :
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// eslint-disable-next-line no-undefined
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undefined,
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// eslint-disable-next-line no-undefined
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hasSourceMap ? compilation.requestShortener : undefined));
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}
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let shebang;
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if ( /** @type {ExtractCommentsObject} */
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this.options.extractComments.banner !== false && output.extractedComments && output.extractedComments.length > 0 && output.code.startsWith("#!")) {
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const firstNewlinePosition = output.code.indexOf("\n");
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shebang = output.code.substring(0, firstNewlinePosition);
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output.code = output.code.substring(firstNewlinePosition + 1);
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}
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if (output.map) {
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output.source = new SourceMapSource(output.code, name, output.map, input, /** @type {SourceMapInput} */inputSourceMap, true);
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} else {
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output.source = new RawSource(output.code);
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}
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if (output.extractedComments && output.extractedComments.length > 0) {
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const commentsFilename = /** @type {ExtractCommentsObject} */
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this.options.extractComments.filename || "[file].LICENSE.txt[query]";
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let query = "";
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let filename = name;
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const querySplit = filename.indexOf("?");
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if (querySplit >= 0) {
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query = filename.slice(querySplit);
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filename = filename.slice(0, querySplit);
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}
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const lastSlashIndex = filename.lastIndexOf("/");
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const basename = lastSlashIndex === -1 ? filename : filename.slice(lastSlashIndex + 1);
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const data = {
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filename,
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basename,
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query
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};
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output.commentsFilename = compilation.getPath(commentsFilename, data);
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let banner;
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// Add a banner to the original file
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if ( /** @type {ExtractCommentsObject} */
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|
this.options.extractComments.banner !== false) {
|
|
banner = /** @type {ExtractCommentsObject} */
|
|
this.options.extractComments.banner || `For license information please see ${path.relative(path.dirname(name), output.commentsFilename).replace(/\\/g, "/")}`;
|
|
if (typeof banner === "function") {
|
|
banner = banner(output.commentsFilename);
|
|
}
|
|
if (banner) {
|
|
output.source = new ConcatSource(shebang ? `${shebang}\n` : "", `/*! ${banner} */\n`, output.source);
|
|
}
|
|
}
|
|
const extractedCommentsString = output.extractedComments.sort().join("\n\n");
|
|
output.extractedCommentsSource = new RawSource(`${extractedCommentsString}\n`);
|
|
}
|
|
await cacheItem.storePromise({
|
|
source: output.source,
|
|
errors: output.errors,
|
|
warnings: output.warnings,
|
|
commentsFilename: output.commentsFilename,
|
|
extractedCommentsSource: output.extractedCommentsSource
|
|
});
|
|
}
|
|
if (output.warnings && output.warnings.length > 0) {
|
|
for (const warning of output.warnings) {
|
|
compilation.warnings.push( /** @type {WebpackError} */warning);
|
|
}
|
|
}
|
|
if (output.errors && output.errors.length > 0) {
|
|
for (const error of output.errors) {
|
|
compilation.errors.push( /** @type {WebpackError} */error);
|
|
}
|
|
}
|
|
|
|
/** @type {Record<string, any>} */
|
|
const newInfo = {
|
|
minimized: true
|
|
};
|
|
const {
|
|
source,
|
|
extractedCommentsSource
|
|
} = output;
|
|
|
|
// Write extracted comments to commentsFilename
|
|
if (extractedCommentsSource) {
|
|
const {
|
|
commentsFilename
|
|
} = output;
|
|
newInfo.related = {
|
|
license: commentsFilename
|
|
};
|
|
allExtractedComments.set(name, {
|
|
extractedCommentsSource,
|
|
commentsFilename
|
|
});
|
|
}
|
|
compilation.updateAsset(name, source, newInfo);
|
|
});
|
|
}
|
|
const limit = getWorker && numberOfAssets > 0 ? ( /** @type {number} */numberOfWorkers) : scheduledTasks.length;
|
|
await throttleAll(limit, scheduledTasks);
|
|
if (initializedWorker) {
|
|
await initializedWorker.end();
|
|
}
|
|
|
|
/** @typedef {{ source: import("webpack").sources.Source, commentsFilename: string, from: string }} ExtractedCommentsInfoWIthFrom */
|
|
await Array.from(allExtractedComments).sort().reduce(
|
|
/**
|
|
* @param {Promise<unknown>} previousPromise
|
|
* @param {[string, ExtractedCommentsInfo]} extractedComments
|
|
* @returns {Promise<ExtractedCommentsInfoWIthFrom>}
|
|
*/
|
|
async (previousPromise, [from, value]) => {
|
|
const previous = /** @type {ExtractedCommentsInfoWIthFrom | undefined} **/
|
|
await previousPromise;
|
|
const {
|
|
commentsFilename,
|
|
extractedCommentsSource
|
|
} = value;
|
|
if (previous && previous.commentsFilename === commentsFilename) {
|
|
const {
|
|
from: previousFrom,
|
|
source: prevSource
|
|
} = previous;
|
|
const mergedName = `${previousFrom}|${from}`;
|
|
const name = `${commentsFilename}|${mergedName}`;
|
|
const eTag = [prevSource, extractedCommentsSource].map(item => cache.getLazyHashedEtag(item)).reduce((previousValue, currentValue) => cache.mergeEtags(previousValue, currentValue));
|
|
let source = await cache.getPromise(name, eTag);
|
|
if (!source) {
|
|
source = new ConcatSource(Array.from(new Set([... /** @type {string}*/prevSource.source().split("\n\n"), ... /** @type {string}*/extractedCommentsSource.source().split("\n\n")])).join("\n\n"));
|
|
await cache.storePromise(name, eTag, source);
|
|
}
|
|
compilation.updateAsset(commentsFilename, source);
|
|
return {
|
|
source,
|
|
commentsFilename,
|
|
from: mergedName
|
|
};
|
|
}
|
|
const existingAsset = compilation.getAsset(commentsFilename);
|
|
if (existingAsset) {
|
|
return {
|
|
source: existingAsset.source,
|
|
commentsFilename,
|
|
from: commentsFilename
|
|
};
|
|
}
|
|
compilation.emitAsset(commentsFilename, extractedCommentsSource, {
|
|
extractedComments: true
|
|
});
|
|
return {
|
|
source: extractedCommentsSource,
|
|
commentsFilename,
|
|
from
|
|
};
|
|
}, /** @type {Promise<unknown>} */Promise.resolve());
|
|
}
|
|
|
|
/**
|
|
* @private
|
|
* @param {any} environment
|
|
* @returns {TerserECMA}
|
|
*/
|
|
static getEcmaVersion(environment) {
|
|
// ES 6th
|
|
if (environment.arrowFunction || environment.const || environment.destructuring || environment.forOf || environment.module) {
|
|
return 2015;
|
|
}
|
|
|
|
// ES 11th
|
|
if (environment.bigIntLiteral || environment.dynamicImport) {
|
|
return 2020;
|
|
}
|
|
return 5;
|
|
}
|
|
|
|
/**
|
|
* @param {Compiler} compiler
|
|
* @returns {void}
|
|
*/
|
|
apply(compiler) {
|
|
const pluginName = this.constructor.name;
|
|
const availableNumberOfCores = TerserPlugin.getAvailableNumberOfCores(this.options.parallel);
|
|
compiler.hooks.compilation.tap(pluginName, compilation => {
|
|
const hooks = compiler.webpack.javascript.JavascriptModulesPlugin.getCompilationHooks(compilation);
|
|
const data = getSerializeJavascript()({
|
|
minimizer: typeof this.options.minimizer.implementation.getMinimizerVersion !== "undefined" ? this.options.minimizer.implementation.getMinimizerVersion() || "0.0.0" : "0.0.0",
|
|
options: this.options.minimizer.options
|
|
});
|
|
hooks.chunkHash.tap(pluginName, (chunk, hash) => {
|
|
hash.update("TerserPlugin");
|
|
hash.update(data);
|
|
});
|
|
compilation.hooks.processAssets.tapPromise({
|
|
name: pluginName,
|
|
stage: compiler.webpack.Compilation.PROCESS_ASSETS_STAGE_OPTIMIZE_SIZE,
|
|
additionalAssets: true
|
|
}, assets => this.optimize(compiler, compilation, assets, {
|
|
availableNumberOfCores
|
|
}));
|
|
compilation.hooks.statsPrinter.tap(pluginName, stats => {
|
|
stats.hooks.print.for("asset.info.minimized").tap("terser-webpack-plugin", (minimized, {
|
|
green,
|
|
formatFlag
|
|
}) => minimized ? /** @type {Function} */green( /** @type {Function} */formatFlag("minimized")) : "");
|
|
});
|
|
});
|
|
}
|
|
}
|
|
TerserPlugin.terserMinify = terserMinify;
|
|
TerserPlugin.uglifyJsMinify = uglifyJsMinify;
|
|
TerserPlugin.swcMinify = swcMinify;
|
|
TerserPlugin.esbuildMinify = esbuildMinify;
|
|
module.exports = TerserPlugin; |