687 lines
20 KiB
JavaScript
687 lines
20 KiB
JavaScript
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"use strict";
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/** @typedef {import("@jridgewell/trace-mapping").SourceMapInput} SourceMapInput */
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/** @typedef {import("terser").FormatOptions} TerserFormatOptions */
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/** @typedef {import("terser").MinifyOptions} TerserOptions */
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/** @typedef {import("terser").ECMA} TerserECMA */
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/** @typedef {import("./index.js").ExtractCommentsOptions} ExtractCommentsOptions */
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/** @typedef {import("./index.js").ExtractCommentsFunction} ExtractCommentsFunction */
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/** @typedef {import("./index.js").ExtractCommentsCondition} ExtractCommentsCondition */
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/** @typedef {import("./index.js").Input} Input */
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/** @typedef {import("./index.js").MinimizedResult} MinimizedResult */
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/** @typedef {import("./index.js").PredefinedOptions} PredefinedOptions */
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/** @typedef {import("./index.js").CustomOptions} CustomOptions */
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/**
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* @typedef {Array<string>} ExtractedComments
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*/
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const notSettled = Symbol(`not-settled`);
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/**
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* @template T
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* @typedef {() => Promise<T>} Task
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*/
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/**
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* Run tasks with limited concurency.
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* @template T
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* @param {number} limit - Limit of tasks that run at once.
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* @param {Task<T>[]} tasks - List of tasks to run.
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* @returns {Promise<T[]>} A promise that fulfills to an array of the results
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*/
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function throttleAll(limit, tasks) {
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if (!Number.isInteger(limit) || limit < 1) {
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throw new TypeError(`Expected \`limit\` to be a finite number > 0, got \`${limit}\` (${typeof limit})`);
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}
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if (!Array.isArray(tasks) || !tasks.every(task => typeof task === `function`)) {
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throw new TypeError(`Expected \`tasks\` to be a list of functions returning a promise`);
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}
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return new Promise((resolve, reject) => {
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const result = Array(tasks.length).fill(notSettled);
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const entries = tasks.entries();
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const next = () => {
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const {
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done,
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value
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} = entries.next();
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if (done) {
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const isLast = !result.includes(notSettled);
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if (isLast) resolve(
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/** @type{T[]} **/
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result);
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return;
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}
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const [index, task] = value;
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/**
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* @param {T} x
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*/
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const onFulfilled = x => {
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result[index] = x;
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next();
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};
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task().then(onFulfilled, reject);
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};
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Array(limit).fill(0).forEach(next);
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});
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}
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/* istanbul ignore next */
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/**
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* @param {Input} input
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* @param {SourceMapInput | undefined} sourceMap
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* @param {PredefinedOptions & CustomOptions} minimizerOptions
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* @param {ExtractCommentsOptions | undefined} extractComments
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* @return {Promise<MinimizedResult>}
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*/
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async function terserMinify(input, sourceMap, minimizerOptions, extractComments) {
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/**
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* @param {any} value
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* @returns {boolean}
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*/
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const isObject = value => {
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const type = typeof value;
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return value != null && (type === "object" || type === "function");
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};
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/**
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* @param {TerserOptions & { sourceMap: undefined } & ({ output: TerserFormatOptions & { beautify: boolean } } | { format: TerserFormatOptions & { beautify: boolean } })} terserOptions
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* @param {ExtractedComments} extractedComments
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* @returns {ExtractCommentsFunction}
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*/
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const buildComments = (terserOptions, extractedComments) => {
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/** @type {{ [index: string]: ExtractCommentsCondition }} */
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const condition = {};
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let comments;
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if (terserOptions.format) {
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({
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comments
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} = terserOptions.format);
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} else if (terserOptions.output) {
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({
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comments
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} = terserOptions.output);
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}
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condition.preserve = typeof comments !== "undefined" ? comments : false;
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if (typeof extractComments === "boolean" && extractComments) {
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condition.extract = "some";
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} else if (typeof extractComments === "string" || extractComments instanceof RegExp) {
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condition.extract = extractComments;
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} else if (typeof extractComments === "function") {
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condition.extract = extractComments;
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} else if (extractComments && isObject(extractComments)) {
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condition.extract = typeof extractComments.condition === "boolean" && extractComments.condition ? "some" : typeof extractComments.condition !== "undefined" ? extractComments.condition : "some";
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} else {
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// No extract
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// Preserve using "commentsOpts" or "some"
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condition.preserve = typeof comments !== "undefined" ? comments : "some";
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condition.extract = false;
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} // Ensure that both conditions are functions
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["preserve", "extract"].forEach(key => {
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/** @type {undefined | string} */
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let regexStr;
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/** @type {undefined | RegExp} */
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let regex;
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switch (typeof condition[key]) {
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case "boolean":
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condition[key] = condition[key] ? () => true : () => false;
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break;
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case "function":
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break;
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case "string":
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if (condition[key] === "all") {
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condition[key] = () => true;
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break;
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}
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if (condition[key] === "some") {
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condition[key] =
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/** @type {ExtractCommentsFunction} */
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(astNode, comment) => (comment.type === "comment2" || comment.type === "comment1") && /@preserve|@lic|@cc_on|^\**!/i.test(comment.value);
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break;
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}
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regexStr =
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/** @type {string} */
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condition[key];
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condition[key] =
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/** @type {ExtractCommentsFunction} */
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(astNode, comment) => new RegExp(
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/** @type {string} */
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regexStr).test(comment.value);
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break;
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default:
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regex =
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/** @type {RegExp} */
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condition[key];
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condition[key] =
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/** @type {ExtractCommentsFunction} */
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(astNode, comment) =>
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/** @type {RegExp} */
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regex.test(comment.value);
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}
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}); // Redefine the comments function to extract and preserve
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// comments according to the two conditions
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return (astNode, comment) => {
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if (
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/** @type {{ extract: ExtractCommentsFunction }} */
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condition.extract(astNode, comment)) {
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const commentText = comment.type === "comment2" ? `/*${comment.value}*/` : `//${comment.value}`; // Don't include duplicate comments
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if (!extractedComments.includes(commentText)) {
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extractedComments.push(commentText);
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}
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}
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return (
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/** @type {{ preserve: ExtractCommentsFunction }} */
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condition.preserve(astNode, comment)
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);
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};
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};
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/**
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* @param {PredefinedOptions & TerserOptions} [terserOptions={}]
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* @returns {TerserOptions & { sourceMap: undefined } & ({ output: TerserFormatOptions & { beautify: boolean } } | { format: TerserFormatOptions & { beautify: boolean } })}
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*/
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const buildTerserOptions = (terserOptions = {}) => {
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// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
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return { ...terserOptions,
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compress: typeof terserOptions.compress === "boolean" ? terserOptions.compress : { ...terserOptions.compress
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},
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// ecma: terserOptions.ecma,
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// ie8: terserOptions.ie8,
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// keep_classnames: terserOptions.keep_classnames,
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// keep_fnames: terserOptions.keep_fnames,
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mangle: terserOptions.mangle == null ? true : typeof terserOptions.mangle === "boolean" ? terserOptions.mangle : { ...terserOptions.mangle
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},
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// module: terserOptions.module,
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// nameCache: { ...terserOptions.toplevel },
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// the `output` option is deprecated
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...(terserOptions.format ? {
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format: {
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beautify: false,
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...terserOptions.format
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}
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} : {
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output: {
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beautify: false,
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...terserOptions.output
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}
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}),
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parse: { ...terserOptions.parse
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},
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// safari10: terserOptions.safari10,
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// Ignoring sourceMap from options
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// eslint-disable-next-line no-undefined
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sourceMap: undefined // toplevel: terserOptions.toplevel
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};
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}; // eslint-disable-next-line global-require
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const {
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minify
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} = require("terser"); // Copy `terser` options
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const terserOptions = buildTerserOptions(minimizerOptions); // Let terser generate a SourceMap
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if (sourceMap) {
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// @ts-ignore
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terserOptions.sourceMap = {
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asObject: true
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};
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}
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/** @type {ExtractedComments} */
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const extractedComments = [];
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if (terserOptions.output) {
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terserOptions.output.comments = buildComments(terserOptions, extractedComments);
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} else if (terserOptions.format) {
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terserOptions.format.comments = buildComments(terserOptions, extractedComments);
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}
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const [[filename, code]] = Object.entries(input);
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const result = await minify({
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[filename]: code
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}, terserOptions);
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return {
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code:
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/** @type {string} **/
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result.code,
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// @ts-ignore
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// eslint-disable-next-line no-undefined
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map: result.map ?
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/** @type {SourceMapInput} **/
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result.map : undefined,
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extractedComments
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};
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}
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/**
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* @returns {string | undefined}
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*/
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terserMinify.getMinimizerVersion = () => {
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let packageJson;
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try {
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// eslint-disable-next-line global-require
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packageJson = require("terser/package.json");
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} catch (error) {// Ignore
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}
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return packageJson && packageJson.version;
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};
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/* istanbul ignore next */
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/**
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* @param {Input} input
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* @param {SourceMapInput | undefined} sourceMap
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* @param {PredefinedOptions & CustomOptions} minimizerOptions
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* @param {ExtractCommentsOptions | undefined} extractComments
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* @return {Promise<MinimizedResult>}
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*/
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async function uglifyJsMinify(input, sourceMap, minimizerOptions, extractComments) {
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/**
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* @param {any} value
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* @returns {boolean}
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*/
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const isObject = value => {
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const type = typeof value;
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return value != null && (type === "object" || type === "function");
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};
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/**
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* @param {import("uglify-js").MinifyOptions & { sourceMap: undefined } & { output: import("uglify-js").OutputOptions & { beautify: boolean }}} uglifyJsOptions
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* @param {ExtractedComments} extractedComments
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* @returns {ExtractCommentsFunction}
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*/
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const buildComments = (uglifyJsOptions, extractedComments) => {
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/** @type {{ [index: string]: ExtractCommentsCondition }} */
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const condition = {};
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const {
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comments
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} = uglifyJsOptions.output;
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condition.preserve = typeof comments !== "undefined" ? comments : false;
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if (typeof extractComments === "boolean" && extractComments) {
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condition.extract = "some";
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} else if (typeof extractComments === "string" || extractComments instanceof RegExp) {
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condition.extract = extractComments;
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} else if (typeof extractComments === "function") {
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condition.extract = extractComments;
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} else if (extractComments && isObject(extractComments)) {
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condition.extract = typeof extractComments.condition === "boolean" && extractComments.condition ? "some" : typeof extractComments.condition !== "undefined" ? extractComments.condition : "some";
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} else {
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// No extract
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// Preserve using "commentsOpts" or "some"
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condition.preserve = typeof comments !== "undefined" ? comments : "some";
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condition.extract = false;
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} // Ensure that both conditions are functions
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["preserve", "extract"].forEach(key => {
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/** @type {undefined | string} */
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let regexStr;
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/** @type {undefined | RegExp} */
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let regex;
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switch (typeof condition[key]) {
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case "boolean":
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condition[key] = condition[key] ? () => true : () => false;
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break;
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case "function":
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break;
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case "string":
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if (condition[key] === "all") {
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condition[key] = () => true;
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break;
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}
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if (condition[key] === "some") {
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condition[key] =
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/** @type {ExtractCommentsFunction} */
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(astNode, comment) => (comment.type === "comment2" || comment.type === "comment1") && /@preserve|@lic|@cc_on|^\**!/i.test(comment.value);
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||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
regexStr =
|
||
|
|
/** @type {string} */
|
||
|
|
condition[key];
|
||
|
|
|
||
|
|
condition[key] =
|
||
|
|
/** @type {ExtractCommentsFunction} */
|
||
|
|
(astNode, comment) => new RegExp(
|
||
|
|
/** @type {string} */
|
||
|
|
regexStr).test(comment.value);
|
||
|
|
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
regex =
|
||
|
|
/** @type {RegExp} */
|
||
|
|
condition[key];
|
||
|
|
|
||
|
|
condition[key] =
|
||
|
|
/** @type {ExtractCommentsFunction} */
|
||
|
|
(astNode, comment) =>
|
||
|
|
/** @type {RegExp} */
|
||
|
|
regex.test(comment.value);
|
||
|
|
|
||
|
|
}
|
||
|
|
}); // Redefine the comments function to extract and preserve
|
||
|
|
// comments according to the two conditions
|
||
|
|
|
||
|
|
return (astNode, comment) => {
|
||
|
|
if (
|
||
|
|
/** @type {{ extract: ExtractCommentsFunction }} */
|
||
|
|
condition.extract(astNode, comment)) {
|
||
|
|
const commentText = comment.type === "comment2" ? `/*${comment.value}*/` : `//${comment.value}`; // Don't include duplicate comments
|
||
|
|
|
||
|
|
if (!extractedComments.includes(commentText)) {
|
||
|
|
extractedComments.push(commentText);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return (
|
||
|
|
/** @type {{ preserve: ExtractCommentsFunction }} */
|
||
|
|
condition.preserve(astNode, comment)
|
||
|
|
);
|
||
|
|
};
|
||
|
|
};
|
||
|
|
/**
|
||
|
|
* @param {PredefinedOptions & import("uglify-js").MinifyOptions} [uglifyJsOptions={}]
|
||
|
|
* @returns {import("uglify-js").MinifyOptions & { sourceMap: undefined } & { output: import("uglify-js").OutputOptions & { beautify: boolean }}}
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
const buildUglifyJsOptions = (uglifyJsOptions = {}) => {
|
||
|
|
// eslint-disable-next-line no-param-reassign
|
||
|
|
delete minimizerOptions.ecma; // eslint-disable-next-line no-param-reassign
|
||
|
|
|
||
|
|
delete minimizerOptions.module; // Need deep copy objects to avoid https://github.com/terser/terser/issues/366
|
||
|
|
|
||
|
|
return { ...uglifyJsOptions,
|
||
|
|
// warnings: uglifyJsOptions.warnings,
|
||
|
|
parse: { ...uglifyJsOptions.parse
|
||
|
|
},
|
||
|
|
compress: typeof uglifyJsOptions.compress === "boolean" ? uglifyJsOptions.compress : { ...uglifyJsOptions.compress
|
||
|
|
},
|
||
|
|
mangle: uglifyJsOptions.mangle == null ? true : typeof uglifyJsOptions.mangle === "boolean" ? uglifyJsOptions.mangle : { ...uglifyJsOptions.mangle
|
||
|
|
},
|
||
|
|
output: {
|
||
|
|
beautify: false,
|
||
|
|
...uglifyJsOptions.output
|
||
|
|
},
|
||
|
|
// Ignoring sourceMap from options
|
||
|
|
// eslint-disable-next-line no-undefined
|
||
|
|
sourceMap: undefined // toplevel: uglifyJsOptions.toplevel
|
||
|
|
// nameCache: { ...uglifyJsOptions.toplevel },
|
||
|
|
// ie8: uglifyJsOptions.ie8,
|
||
|
|
// keep_fnames: uglifyJsOptions.keep_fnames,
|
||
|
|
|
||
|
|
};
|
||
|
|
}; // eslint-disable-next-line global-require, import/no-extraneous-dependencies
|
||
|
|
|
||
|
|
|
||
|
|
const {
|
||
|
|
minify
|
||
|
|
} = require("uglify-js"); // Copy `uglify-js` options
|
||
|
|
|
||
|
|
|
||
|
|
const uglifyJsOptions = buildUglifyJsOptions(minimizerOptions); // Let terser generate a SourceMap
|
||
|
|
|
||
|
|
if (sourceMap) {
|
||
|
|
// @ts-ignore
|
||
|
|
uglifyJsOptions.sourceMap = true;
|
||
|
|
}
|
||
|
|
/** @type {ExtractedComments} */
|
||
|
|
|
||
|
|
|
||
|
|
const extractedComments = []; // @ts-ignore
|
||
|
|
|
||
|
|
uglifyJsOptions.output.comments = buildComments(uglifyJsOptions, extractedComments);
|
||
|
|
const [[filename, code]] = Object.entries(input);
|
||
|
|
const result = await minify({
|
||
|
|
[filename]: code
|
||
|
|
}, uglifyJsOptions);
|
||
|
|
return {
|
||
|
|
code: result.code,
|
||
|
|
// eslint-disable-next-line no-undefined
|
||
|
|
map: result.map ? JSON.parse(result.map) : undefined,
|
||
|
|
errors: result.error ? [result.error] : [],
|
||
|
|
warnings: result.warnings || [],
|
||
|
|
extractedComments
|
||
|
|
};
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @returns {string | undefined}
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
uglifyJsMinify.getMinimizerVersion = () => {
|
||
|
|
let packageJson;
|
||
|
|
|
||
|
|
try {
|
||
|
|
// eslint-disable-next-line global-require, import/no-extraneous-dependencies
|
||
|
|
packageJson = require("uglify-js/package.json");
|
||
|
|
} catch (error) {// Ignore
|
||
|
|
}
|
||
|
|
|
||
|
|
return packageJson && packageJson.version;
|
||
|
|
};
|
||
|
|
/* istanbul ignore next */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param {Input} input
|
||
|
|
* @param {SourceMapInput | undefined} sourceMap
|
||
|
|
* @param {PredefinedOptions & CustomOptions} minimizerOptions
|
||
|
|
* @return {Promise<MinimizedResult>}
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
async function swcMinify(input, sourceMap, minimizerOptions) {
|
||
|
|
/**
|
||
|
|
* @param {PredefinedOptions & import("@swc/core").JsMinifyOptions} [swcOptions={}]
|
||
|
|
* @returns {import("@swc/core").JsMinifyOptions & { sourceMap: undefined }}
|
||
|
|
*/
|
||
|
|
const buildSwcOptions = (swcOptions = {}) => {
|
||
|
|
// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
|
||
|
|
return { ...swcOptions,
|
||
|
|
compress: typeof swcOptions.compress === "boolean" ? swcOptions.compress : { ...swcOptions.compress
|
||
|
|
},
|
||
|
|
mangle: swcOptions.mangle == null ? true : typeof swcOptions.mangle === "boolean" ? swcOptions.mangle : { ...swcOptions.mangle
|
||
|
|
},
|
||
|
|
// ecma: swcOptions.ecma,
|
||
|
|
// keep_classnames: swcOptions.keep_classnames,
|
||
|
|
// keep_fnames: swcOptions.keep_fnames,
|
||
|
|
// module: swcOptions.module,
|
||
|
|
// safari10: swcOptions.safari10,
|
||
|
|
// toplevel: swcOptions.toplevel
|
||
|
|
// eslint-disable-next-line no-undefined
|
||
|
|
sourceMap: undefined
|
||
|
|
};
|
||
|
|
}; // eslint-disable-next-line import/no-extraneous-dependencies, global-require
|
||
|
|
|
||
|
|
|
||
|
|
const swc = require("@swc/core"); // Copy `swc` options
|
||
|
|
|
||
|
|
|
||
|
|
const swcOptions = buildSwcOptions(minimizerOptions); // Let `swc` generate a SourceMap
|
||
|
|
|
||
|
|
if (sourceMap) {
|
||
|
|
// @ts-ignore
|
||
|
|
swcOptions.sourceMap = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
const [[filename, code]] = Object.entries(input);
|
||
|
|
const result = await swc.minify(code, swcOptions);
|
||
|
|
let map;
|
||
|
|
|
||
|
|
if (result.map) {
|
||
|
|
map = JSON.parse(result.map); // TODO workaround for swc because `filename` is not preset as in `swc` signature as for `terser`
|
||
|
|
|
||
|
|
map.sources = [filename];
|
||
|
|
delete map.sourcesContent;
|
||
|
|
}
|
||
|
|
|
||
|
|
return {
|
||
|
|
code: result.code,
|
||
|
|
map
|
||
|
|
};
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @returns {string | undefined}
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
swcMinify.getMinimizerVersion = () => {
|
||
|
|
let packageJson;
|
||
|
|
|
||
|
|
try {
|
||
|
|
// eslint-disable-next-line global-require, import/no-extraneous-dependencies
|
||
|
|
packageJson = require("@swc/core/package.json");
|
||
|
|
} catch (error) {// Ignore
|
||
|
|
}
|
||
|
|
|
||
|
|
return packageJson && packageJson.version;
|
||
|
|
};
|
||
|
|
/* istanbul ignore next */
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @param {Input} input
|
||
|
|
* @param {SourceMapInput | undefined} sourceMap
|
||
|
|
* @param {PredefinedOptions & CustomOptions} minimizerOptions
|
||
|
|
* @return {Promise<MinimizedResult>}
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
async function esbuildMinify(input, sourceMap, minimizerOptions) {
|
||
|
|
/**
|
||
|
|
* @param {PredefinedOptions & import("esbuild").TransformOptions} [esbuildOptions={}]
|
||
|
|
* @returns {import("esbuild").TransformOptions}
|
||
|
|
*/
|
||
|
|
const buildEsbuildOptions = (esbuildOptions = {}) => {
|
||
|
|
// eslint-disable-next-line no-param-reassign
|
||
|
|
delete esbuildOptions.ecma;
|
||
|
|
|
||
|
|
if (esbuildOptions.module) {
|
||
|
|
// eslint-disable-next-line no-param-reassign
|
||
|
|
esbuildOptions.format = "esm";
|
||
|
|
} // eslint-disable-next-line no-param-reassign
|
||
|
|
|
||
|
|
|
||
|
|
delete esbuildOptions.module; // Need deep copy objects to avoid https://github.com/terser/terser/issues/366
|
||
|
|
|
||
|
|
return {
|
||
|
|
minify: true,
|
||
|
|
legalComments: "inline",
|
||
|
|
...esbuildOptions,
|
||
|
|
sourcemap: false
|
||
|
|
};
|
||
|
|
}; // eslint-disable-next-line import/no-extraneous-dependencies, global-require
|
||
|
|
|
||
|
|
|
||
|
|
const esbuild = require("esbuild"); // Copy `esbuild` options
|
||
|
|
|
||
|
|
|
||
|
|
const esbuildOptions = buildEsbuildOptions(minimizerOptions); // Let `esbuild` generate a SourceMap
|
||
|
|
|
||
|
|
if (sourceMap) {
|
||
|
|
esbuildOptions.sourcemap = true;
|
||
|
|
esbuildOptions.sourcesContent = false;
|
||
|
|
}
|
||
|
|
|
||
|
|
const [[filename, code]] = Object.entries(input);
|
||
|
|
esbuildOptions.sourcefile = filename;
|
||
|
|
const result = await esbuild.transform(code, esbuildOptions);
|
||
|
|
return {
|
||
|
|
code: result.code,
|
||
|
|
// eslint-disable-next-line no-undefined
|
||
|
|
map: result.map ? JSON.parse(result.map) : undefined,
|
||
|
|
warnings: result.warnings.length > 0 ? result.warnings.map(item => {
|
||
|
|
return {
|
||
|
|
name: "Warning",
|
||
|
|
source: item.location && item.location.file,
|
||
|
|
line: item.location && item.location.line,
|
||
|
|
column: item.location && item.location.column,
|
||
|
|
plugin: item.pluginName,
|
||
|
|
message: `${item.text}${item.detail ? `\nDetails:\n${item.detail}` : ""}${item.notes.length > 0 ? `\n\nNotes:\n${item.notes.map(note => `${note.location ? `[${note.location.file}:${note.location.line}:${note.location.column}] ` : ""}${note.text}${note.location ? `\nSuggestion: ${note.location.suggestion}` : ""}${note.location ? `\nLine text:\n${note.location.lineText}\n` : ""}`).join("\n")}` : ""}`
|
||
|
|
};
|
||
|
|
}) : []
|
||
|
|
};
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* @returns {string | undefined}
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
esbuildMinify.getMinimizerVersion = () => {
|
||
|
|
let packageJson;
|
||
|
|
|
||
|
|
try {
|
||
|
|
// eslint-disable-next-line global-require, import/no-extraneous-dependencies
|
||
|
|
packageJson = require("esbuild/package.json");
|
||
|
|
} catch (error) {// Ignore
|
||
|
|
}
|
||
|
|
|
||
|
|
return packageJson && packageJson.version;
|
||
|
|
};
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
throttleAll,
|
||
|
|
terserMinify,
|
||
|
|
uglifyJsMinify,
|
||
|
|
swcMinify,
|
||
|
|
esbuildMinify
|
||
|
|
};
|