637 lines
22 KiB
JavaScript
637 lines
22 KiB
JavaScript
"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").CompressOptions} TerserCompressOptions */
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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 concurrency.
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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( /** @type{T[]} **/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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}
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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] = /** @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 = /** @type {string} */condition[key];
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condition[key] = /** @type {ExtractCommentsFunction} */
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(astNode, comment) => new RegExp( /** @type {string} */regexStr).test(comment.value);
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break;
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default:
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regex = /** @type {RegExp} */condition[key];
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condition[key] = /** @type {ExtractCommentsFunction} */
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(astNode, comment) => /** @type {RegExp} */regex.test(comment.value);
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}
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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 ( /** @type {{ extract: ExtractCommentsFunction }} */
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condition.extract(astNode, comment)) {
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const commentText = comment.type === "comment2" ? `/*${comment.value}*/` : `//${comment.value}`;
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// 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 /** @type {{ preserve: ExtractCommentsFunction }} */condition.preserve(astNode, comment);
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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 } & { compress: TerserCompressOptions } & ({ 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 {
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...terserOptions,
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compress: typeof terserOptions.compress === "boolean" ? terserOptions.compress ? {} : false : {
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...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 : {
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...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: {
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...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
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// toplevel: terserOptions.toplevel
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};
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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");
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// Copy `terser` options
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const terserOptions = buildTerserOptions(minimizerOptions);
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// 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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if (terserOptions.compress) {
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// More optimizations
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if (typeof terserOptions.compress.ecma === "undefined") {
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terserOptions.compress.ecma = terserOptions.ecma;
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}
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// https://github.com/webpack/webpack/issues/16135
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if (terserOptions.ecma === 5 && typeof terserOptions.compress.arrows === "undefined") {
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terserOptions.compress.arrows = false;
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}
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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: ( /** @type {string} **/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 ? ( /** @type {SourceMapInput} **/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) {
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// 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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}
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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] = /** @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 = /** @type {string} */condition[key];
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condition[key] = /** @type {ExtractCommentsFunction} */
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(astNode, comment) => new RegExp( /** @type {string} */regexStr).test(comment.value);
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break;
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default:
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regex = /** @type {RegExp} */condition[key];
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condition[key] = /** @type {ExtractCommentsFunction} */
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(astNode, comment) => /** @type {RegExp} */regex.test(comment.value);
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}
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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 ( /** @type {{ extract: ExtractCommentsFunction }} */
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condition.extract(astNode, comment)) {
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const commentText = comment.type === "comment2" ? `/*${comment.value}*/` : `//${comment.value}`;
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// 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 /** @type {{ preserve: ExtractCommentsFunction }} */condition.preserve(astNode, comment);
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};
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};
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/**
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* @param {PredefinedOptions & import("uglify-js").MinifyOptions} [uglifyJsOptions={}]
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* @returns {import("uglify-js").MinifyOptions & { sourceMap: undefined } & { output: import("uglify-js").OutputOptions & { beautify: boolean }}}
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*/
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const buildUglifyJsOptions = (uglifyJsOptions = {}) => {
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// eslint-disable-next-line no-param-reassign
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delete minimizerOptions.ecma;
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// eslint-disable-next-line no-param-reassign
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delete minimizerOptions.module;
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// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
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return {
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...uglifyJsOptions,
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// warnings: uglifyJsOptions.warnings,
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parse: {
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...uglifyJsOptions.parse
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},
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compress: typeof uglifyJsOptions.compress === "boolean" ? uglifyJsOptions.compress : {
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...uglifyJsOptions.compress
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},
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mangle: uglifyJsOptions.mangle == null ? true : typeof uglifyJsOptions.mangle === "boolean" ? uglifyJsOptions.mangle : {
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...uglifyJsOptions.mangle
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},
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output: {
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beautify: false,
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...uglifyJsOptions.output
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},
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// Ignoring sourceMap from options
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// eslint-disable-next-line no-undefined
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sourceMap: undefined
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// toplevel: uglifyJsOptions.toplevel
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// nameCache: { ...uglifyJsOptions.toplevel },
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// ie8: uglifyJsOptions.ie8,
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// keep_fnames: uglifyJsOptions.keep_fnames,
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};
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};
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// eslint-disable-next-line global-require, import/no-extraneous-dependencies
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const {
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minify
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} = require("uglify-js");
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// Copy `uglify-js` options
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const uglifyJsOptions = buildUglifyJsOptions(minimizerOptions);
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// Let terser generate a SourceMap
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if (sourceMap) {
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// @ts-ignore
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uglifyJsOptions.sourceMap = true;
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}
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/** @type {ExtractedComments} */
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const extractedComments = [];
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// @ts-ignore
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uglifyJsOptions.output.comments = buildComments(uglifyJsOptions, extractedComments);
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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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}, uglifyJsOptions);
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return {
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code: result.code,
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// eslint-disable-next-line no-undefined
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map: result.map ? JSON.parse(result.map) : undefined,
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errors: result.error ? [result.error] : [],
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warnings: result.warnings || [],
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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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uglifyJsMinify.getMinimizerVersion = () => {
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let packageJson;
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try {
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// eslint-disable-next-line global-require, import/no-extraneous-dependencies
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packageJson = require("uglify-js/package.json");
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} catch (error) {
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// 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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* @return {Promise<MinimizedResult>}
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*/
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async function swcMinify(input, sourceMap, minimizerOptions) {
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/**
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* @param {PredefinedOptions & import("@swc/core").JsMinifyOptions} [swcOptions={}]
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* @returns {import("@swc/core").JsMinifyOptions & { sourceMap: undefined } & { compress: import("@swc/core").TerserCompressOptions }}
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*/
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const buildSwcOptions = (swcOptions = {}) => {
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// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
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return {
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...swcOptions,
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compress: typeof swcOptions.compress === "boolean" ? swcOptions.compress ? {} : false : {
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...swcOptions.compress
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},
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mangle: swcOptions.mangle == null ? true : typeof swcOptions.mangle === "boolean" ? swcOptions.mangle : {
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...swcOptions.mangle
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},
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// ecma: swcOptions.ecma,
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// keep_classnames: swcOptions.keep_classnames,
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// keep_fnames: swcOptions.keep_fnames,
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// module: swcOptions.module,
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// safari10: swcOptions.safari10,
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// toplevel: swcOptions.toplevel
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// eslint-disable-next-line no-undefined
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sourceMap: undefined
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};
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};
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// eslint-disable-next-line import/no-extraneous-dependencies, global-require
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const swc = require("@swc/core");
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// Copy `swc` options
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const swcOptions = buildSwcOptions(minimizerOptions);
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// Let `swc` generate a SourceMap
|
|
if (sourceMap) {
|
|
// @ts-ignore
|
|
swcOptions.sourceMap = true;
|
|
}
|
|
if (swcOptions.compress) {
|
|
// More optimizations
|
|
if (typeof swcOptions.compress.ecma === "undefined") {
|
|
swcOptions.compress.ecma = swcOptions.ecma;
|
|
}
|
|
|
|
// https://github.com/webpack/webpack/issues/16135
|
|
if (swcOptions.ecma === 5 && typeof swcOptions.compress.arrows === "undefined") {
|
|
swcOptions.compress.arrows = false;
|
|
}
|
|
}
|
|
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 => {
|
|
const plugin = item.pluginName ? `\nPlugin Name: ${item.pluginName}` : "";
|
|
const location = item.location ? `\n\n${item.location.file}:${item.location.line}:${item.location.column}:\n ${item.location.line} | ${item.location.lineText}\n\nSuggestion: ${item.location.suggestion}` : "";
|
|
const notes = item.notes.length > 0 ? `\n\nNotes:\n${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${note.location.lineText}\n` : ""}`).join("\n")}` : "";
|
|
return `${item.text} [${item.id}]${plugin}${location}${item.detail ? `\nDetails:\n${item.detail}` : ""}${notes}`;
|
|
}) : []
|
|
};
|
|
}
|
|
|
|
/**
|
|
* @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;
|
|
};
|
|
|
|
/**
|
|
* @template T
|
|
* @param fn {(function(): any) | undefined}
|
|
* @returns {function(): T}
|
|
*/
|
|
function memoize(fn) {
|
|
let cache = false;
|
|
/** @type {T} */
|
|
let result;
|
|
return () => {
|
|
if (cache) {
|
|
return result;
|
|
}
|
|
result = /** @type {function(): any} */fn();
|
|
cache = true;
|
|
// Allow to clean up memory for fn
|
|
// and all dependent resources
|
|
// eslint-disable-next-line no-undefined, no-param-reassign
|
|
fn = undefined;
|
|
return result;
|
|
};
|
|
}
|
|
module.exports = {
|
|
throttleAll,
|
|
memoize,
|
|
terserMinify,
|
|
uglifyJsMinify,
|
|
swcMinify,
|
|
esbuildMinify
|
|
}; |