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687 lines
20 KiB
687 lines
20 KiB
"use strict"; |
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/** @typedef {import("source-map").RawSourceMap} RawSourceMap */ |
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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 {RawSourceMap | 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 {RawSourceMap} **/ |
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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 {RawSourceMap | 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; |
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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 & 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; // eslint-disable-next-line no-param-reassign |
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delete minimizerOptions.module; // Need deep copy objects to avoid https://github.com/terser/terser/issues/366 |
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return { ...uglifyJsOptions, |
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// warnings: uglifyJsOptions.warnings, |
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parse: { ...uglifyJsOptions.parse |
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}, |
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compress: typeof uglifyJsOptions.compress === "boolean" ? uglifyJsOptions.compress : { ...uglifyJsOptions.compress |
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}, |
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mangle: uglifyJsOptions.mangle == null ? true : typeof uglifyJsOptions.mangle === "boolean" ? uglifyJsOptions.mangle : { ...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 // 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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}; // 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"); // Copy `uglify-js` options |
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const uglifyJsOptions = buildUglifyJsOptions(minimizerOptions); // 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 = []; // @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) {// 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 {RawSourceMap | 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 }} |
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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 { ...swcOptions, |
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compress: typeof swcOptions.compress === "boolean" ? swcOptions.compress : { ...swcOptions.compress |
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}, |
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mangle: swcOptions.mangle == null ? true : typeof swcOptions.mangle === "boolean" ? swcOptions.mangle : { ...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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}; // eslint-disable-next-line import/no-extraneous-dependencies, global-require |
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const swc = require("@swc/core"); // Copy `swc` options |
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const swcOptions = buildSwcOptions(minimizerOptions); // Let `swc` generate a SourceMap |
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if (sourceMap) { |
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// @ts-ignore |
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swcOptions.sourceMap = true; |
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} |
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const [[filename, code]] = Object.entries(input); |
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const result = await swc.minify(code, swcOptions); |
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let map; |
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if (result.map) { |
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map = JSON.parse(result.map); // TODO workaround for swc because `filename` is not preset as in `swc` signature as for `terser` |
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map.sources = [filename]; |
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delete map.sourcesContent; |
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} |
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return { |
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code: result.code, |
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map |
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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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swcMinify.getMinimizerVersion = () => { |
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let packageJson; |
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|
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try { |
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// eslint-disable-next-line global-require, import/no-extraneous-dependencies |
|
packageJson = require("@swc/core/package.json"); |
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} catch (error) {// Ignore |
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} |
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|
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return packageJson && packageJson.version; |
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}; |
|
/* istanbul ignore next */ |
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/** |
|
* @param {Input} input |
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* @param {RawSourceMap | undefined} sourceMap |
|
* @param {PredefinedOptions & CustomOptions} minimizerOptions |
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* @return {Promise<MinimizedResult>} |
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*/ |
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async function esbuildMinify(input, sourceMap, minimizerOptions) { |
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/** |
|
* @param {PredefinedOptions & import("esbuild").TransformOptions} [esbuildOptions={}] |
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* @returns {import("esbuild").TransformOptions} |
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*/ |
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const buildEsbuildOptions = (esbuildOptions = {}) => { |
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// eslint-disable-next-line no-param-reassign |
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delete esbuildOptions.ecma; |
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|
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if (esbuildOptions.module) { |
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// eslint-disable-next-line no-param-reassign |
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esbuildOptions.format = "esm"; |
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} // eslint-disable-next-line no-param-reassign |
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|
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delete esbuildOptions.module; // Need deep copy objects to avoid https://github.com/terser/terser/issues/366 |
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|
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return { |
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minify: true, |
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legalComments: "inline", |
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...esbuildOptions, |
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sourcemap: false |
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}; |
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}; // eslint-disable-next-line import/no-extraneous-dependencies, global-require |
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|
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const esbuild = require("esbuild"); // Copy `esbuild` options |
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|
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const esbuildOptions = buildEsbuildOptions(minimizerOptions); // Let `esbuild` generate a SourceMap |
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|
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if (sourceMap) { |
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esbuildOptions.sourcemap = true; |
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esbuildOptions.sourcesContent = false; |
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} |
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|
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const [[filename, code]] = Object.entries(input); |
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esbuildOptions.sourcefile = filename; |
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const result = await esbuild.transform(code, esbuildOptions); |
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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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warnings: result.warnings.length > 0 ? result.warnings.map(item => { |
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return { |
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name: "Warning", |
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source: item.location && item.location.file, |
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line: item.location && item.location.line, |
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column: item.location && item.location.column, |
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plugin: item.pluginName, |
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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")}` : ""}` |
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}; |
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}) : [] |
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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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|
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esbuildMinify.getMinimizerVersion = () => { |
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let packageJson; |
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|
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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("esbuild/package.json"); |
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} catch (error) {// Ignore |
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} |
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|
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return packageJson && packageJson.version; |
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}; |
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|
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module.exports = { |
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throttleAll, |
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terserMinify, |
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uglifyJsMinify, |
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swcMinify, |
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esbuildMinify |
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}; |