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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.terserMinify = terserMinify;
exports.uglifyJsMinify = uglifyJsMinify;
exports.swcMinify = swcMinify;
exports.esbuildMinify = esbuildMinify;
/** @typedef {import("source-map").RawSourceMap} RawSourceMap */
/** @typedef {import("terser").FormatOptions} TerserFormatOptions */
/** @typedef {import("terser").MinifyOptions} TerserOptions */
/** @typedef {import("terser").ECMA} TerserECMA */
/** @typedef {import("./index.js").ExtractCommentsOptions} ExtractCommentsOptions */
/** @typedef {import("./index.js").ExtractCommentsFunction} ExtractCommentsFunction */
/** @typedef {import("./index.js").ExtractCommentsCondition} ExtractCommentsCondition */
/** @typedef {import("./index.js").Input} Input */
/** @typedef {import("./index.js").MinimizedResult} MinimizedResult */
/** @typedef {import("./index.js").PredefinedOptions} PredefinedOptions */
/**
* @typedef {{ [key: string]: any }} CustomOptions
*/
/**
* @typedef {Array<string>} ExtractedComments
*/
/* istanbul ignore next */
/**
* @param {Input} input
* @param {RawSourceMap | undefined} sourceMap
* @param {PredefinedOptions & CustomOptions} minimizerOptions
* @param {ExtractCommentsOptions | undefined} extractComments
* @return {Promise<MinimizedResult>}
*/
async function terserMinify(input, sourceMap, minimizerOptions, extractComments) {
/**
* @param {any} value
* @returns {boolean}
*/
const isObject = value => {
const type = typeof value;
return value != null && (type === "object" || type === "function");
};
/**
* @param {TerserOptions & { sourceMap: undefined } & ({ output: TerserFormatOptions & { beautify: boolean } } | { format: TerserFormatOptions & { beautify: boolean } })} terserOptions
* @param {ExtractedComments} extractedComments
* @returns {ExtractCommentsFunction}
*/
const buildComments = (terserOptions, extractedComments) => {
/** @type {{ [index: string]: ExtractCommentsCondition }} */
const condition = {};
let comments;
if (terserOptions.format) {
({
comments
} = terserOptions.format);
} else if (terserOptions.output) {
({
comments
} = terserOptions.output);
}
condition.preserve = typeof comments !== "undefined" ? comments : false;
if (typeof extractComments === "boolean" && extractComments) {
condition.extract = "some";
} else if (typeof extractComments === "string" || extractComments instanceof RegExp) {
condition.extract = extractComments;
} else if (typeof extractComments === "function") {
condition.extract = extractComments;
} else if (extractComments && isObject(extractComments)) {
condition.extract = typeof extractComments.condition === "boolean" && extractComments.condition ? "some" : typeof extractComments.condition !== "undefined" ? extractComments.condition : "some";
} else {
// No extract
// Preserve using "commentsOpts" or "some"
condition.preserve = typeof comments !== "undefined" ? comments : "some";
condition.extract = false;
} // Ensure that both conditions are functions
["preserve", "extract"].forEach(key => {
/** @type {undefined | string} */
let regexStr;
/** @type {undefined | RegExp} */
let regex;
switch (typeof condition[key]) {
case "boolean":
condition[key] = condition[key] ? () => true : () => false;
break;
case "function":
break;
case "string":
if (condition[key] === "all") {
condition[key] = () => true;
break;
}
if (condition[key] === "some") {
condition[key] = (astNode, comment) => (comment.type === "comment2" || comment.type === "comment1") && /@preserve|@lic|@cc_on|^\**!/i.test(comment.value);
break;
}
regexStr = condition[key];
condition[key] = (astNode, comment) => new RegExp(regexStr).test(comment.value);
break;
default:
regex = condition[key];
condition[key] = (astNode, comment) =>
/** @type {RegExp} */
regex.test(comment.value);
}
}); // Redefine the comments function to extract and preserve
// comments according to the two conditions
return (astNode, comment) => {
if (
/** @type {{ extract: ExtractCommentsFunction }} */
condition.extract(astNode, comment)) {
const commentText = comment.type === "comment2" ? `/*${comment.value}*/` : `//${comment.value}`; // Don't include duplicate comments
if (!extractedComments.includes(commentText)) {
extractedComments.push(commentText);
}
}
return (
/** @type {{ preserve: ExtractCommentsFunction }} */
condition.preserve(astNode, comment)
);
};
};
/**
* @param {PredefinedOptions & TerserOptions} [terserOptions={}]
* @returns {TerserOptions & { sourceMap: undefined } & ({ output: TerserFormatOptions & { beautify: boolean } } | { format: TerserFormatOptions & { beautify: boolean } })}
*/
const buildTerserOptions = (terserOptions = {}) => {
// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
return { ...terserOptions,
compress: typeof terserOptions.compress === "boolean" ? terserOptions.compress : { ...terserOptions.compress
},
// ecma: terserOptions.ecma,
// ie8: terserOptions.ie8,
// keep_classnames: terserOptions.keep_classnames,
// keep_fnames: terserOptions.keep_fnames,
mangle: terserOptions.mangle == null ? true : typeof terserOptions.mangle === "boolean" ? terserOptions.mangle : { ...terserOptions.mangle
},
// module: terserOptions.module,
// nameCache: { ...terserOptions.toplevel },
// the `output` option is deprecated
...(terserOptions.format ? {
format: {
beautify: false,
...terserOptions.format
}
} : {
output: {
beautify: false,
...terserOptions.output
}
}),
parse: { ...terserOptions.parse
},
// safari10: terserOptions.safari10,
// Ignoring sourceMap from options
// eslint-disable-next-line no-undefined
sourceMap: undefined // toplevel: terserOptions.toplevel
};
}; // eslint-disable-next-line global-require
const {
minify
} = require("terser"); // Copy `terser` options
const terserOptions = buildTerserOptions(minimizerOptions); // Let terser generate a SourceMap
if (sourceMap) {
// @ts-ignore
terserOptions.sourceMap = {
asObject: true
};
}
/** @type {ExtractedComments} */
const extractedComments = [];
if (terserOptions.output) {
terserOptions.output.comments = buildComments(terserOptions, extractedComments);
} else if (terserOptions.format) {
terserOptions.format.comments = buildComments(terserOptions, extractedComments);
}
const [[filename, code]] = Object.entries(input);
const result = await minify({
[filename]: code
}, terserOptions);
return {
code: result.code,
// @ts-ignore
// eslint-disable-next-line no-undefined
map: result.map ? result.map : undefined,
extractedComments
};
}
/**
* @returns {string | undefined}
*/
terserMinify.getMinimizerVersion = () => {
let packageJson;
try {
// eslint-disable-next-line global-require
packageJson = require("terser/package.json");
} catch (error) {// Ignore
}
return packageJson && packageJson.version;
};
/* istanbul ignore next */
/**
* @param {Input} input
* @param {RawSourceMap | undefined} sourceMap
* @param {PredefinedOptions & CustomOptions} minimizerOptions
* @param {ExtractCommentsOptions | undefined} extractComments
* @return {Promise<MinimizedResult>}
*/
async function uglifyJsMinify(input, sourceMap, minimizerOptions, extractComments) {
/**
* @param {any} value
* @returns {boolean}
*/
const isObject = value => {
const type = typeof value;
return value != null && (type === "object" || type === "function");
};
/**
* @param {import("uglify-js").MinifyOptions & { sourceMap: undefined } & { output: import("uglify-js").OutputOptions & { beautify: boolean }}} uglifyJsOptions
* @param {ExtractedComments} extractedComments
* @returns {ExtractCommentsFunction}
*/
const buildComments = (uglifyJsOptions, extractedComments) => {
/** @type {{ [index: string]: ExtractCommentsCondition }} */
const condition = {};
const {
comments
} = uglifyJsOptions.output;
condition.preserve = typeof comments !== "undefined" ? comments : false;
if (typeof extractComments === "boolean" && extractComments) {
condition.extract = "some";
} else if (typeof extractComments === "string" || extractComments instanceof RegExp) {
condition.extract = extractComments;
} else if (typeof extractComments === "function") {
condition.extract = extractComments;
} else if (extractComments && isObject(extractComments)) {
condition.extract = typeof extractComments.condition === "boolean" && extractComments.condition ? "some" : typeof extractComments.condition !== "undefined" ? extractComments.condition : "some";
} else {
// No extract
// Preserve using "commentsOpts" or "some"
condition.preserve = typeof comments !== "undefined" ? comments : "some";
condition.extract = false;
} // Ensure that both conditions are functions
["preserve", "extract"].forEach(key => {
/** @type {undefined | string} */
let regexStr;
/** @type {undefined | RegExp} */
let regex;
switch (typeof condition[key]) {
case "boolean":
condition[key] = condition[key] ? () => true : () => false;
break;
case "function":
break;
case "string":
if (condition[key] === "all") {
condition[key] = () => true;
break;
}
if (condition[key] === "some") {
condition[key] = (astNode, comment) => (comment.type === "comment2" || comment.type === "comment1") && /@preserve|@lic|@cc_on|^\**!/i.test(comment.value);
break;
}
regexStr = condition[key];
condition[key] = (astNode, comment) => new RegExp(regexStr).test(comment.value);
break;
default:
regex = condition[key];
condition[key] = (astNode, comment) =>
/** @type {RegExp} */
regex.test(comment.value);
}
}); // Redefine the comments function to extract and preserve
// comments according to the two conditions
return (astNode, comment) => {
if (
/** @type {{ extract: ExtractCommentsFunction }} */
condition.extract(astNode, comment)) {
const commentText = comment.type === "comment2" ? `/*${comment.value}*/` : `//${comment.value}`; // Don't include duplicate comments
if (!extractedComments.includes(commentText)) {
extractedComments.push(commentText);
}
}
return (
/** @type {{ preserve: ExtractCommentsFunction }} */
condition.preserve(astNode, comment)
);
};
};
/**
* @param {PredefinedOptions & import("uglify-js").MinifyOptions} [uglifyJsOptions={}]
* @returns {import("uglify-js").MinifyOptions & { sourceMap: undefined } & { output: import("uglify-js").OutputOptions & { beautify: boolean }}}
*/
const buildUglifyJsOptions = (uglifyJsOptions = {}) => {
// eslint-disable-next-line no-param-reassign
delete minimizerOptions.ecma; // eslint-disable-next-line no-param-reassign
delete minimizerOptions.module; // Need deep copy objects to avoid https://github.com/terser/terser/issues/366
return { ...uglifyJsOptions,
// warnings: uglifyJsOptions.warnings,
parse: { ...uglifyJsOptions.parse
},
compress: typeof uglifyJsOptions.compress === "boolean" ? uglifyJsOptions.compress : { ...uglifyJsOptions.compress
},
mangle: uglifyJsOptions.mangle == null ? true : typeof uglifyJsOptions.mangle === "boolean" ? uglifyJsOptions.mangle : { ...uglifyJsOptions.mangle
},
output: {
beautify: false,
...uglifyJsOptions.output
},
// Ignoring sourceMap from options
// eslint-disable-next-line no-undefined
sourceMap: undefined // toplevel: uglifyJsOptions.toplevel
// nameCache: { ...uglifyJsOptions.toplevel },
// ie8: uglifyJsOptions.ie8,
// keep_fnames: uglifyJsOptions.keep_fnames,
};
}; // eslint-disable-next-line global-require, import/no-extraneous-dependencies
const {
minify
} = require("uglify-js"); // Copy `uglify-js` options
const uglifyJsOptions = buildUglifyJsOptions(minimizerOptions); // Let terser generate a SourceMap
if (sourceMap) {
// @ts-ignore
uglifyJsOptions.sourceMap = true;
}
/** @type {ExtractedComments} */
const extractedComments = []; // @ts-ignore
uglifyJsOptions.output.comments = buildComments(uglifyJsOptions, extractedComments);
const [[filename, code]] = Object.entries(input);
const result = await minify({
[filename]: code
}, uglifyJsOptions);
return {
code: result.code,
// eslint-disable-next-line no-undefined
map: result.map ? JSON.parse(result.map) : undefined,
errors: result.error ? [result.error] : [],
warnings: result.warnings || [],
extractedComments
};
}
/**
* @returns {string | undefined}
*/
uglifyJsMinify.getMinimizerVersion = () => {
let packageJson;
try {
// eslint-disable-next-line global-require, import/no-extraneous-dependencies
packageJson = require("uglify-js/package.json");
} catch (error) {// Ignore
}
return packageJson && packageJson.version;
};
/* istanbul ignore next */
/**
* @param {Input} input
* @param {RawSourceMap | undefined} sourceMap
* @param {PredefinedOptions & CustomOptions} minimizerOptions
* @return {Promise<MinimizedResult>}
*/
async function swcMinify(input, sourceMap, minimizerOptions) {
/**
* @param {PredefinedOptions & import("@swc/core").JsMinifyOptions} [swcOptions={}]
* @returns {import("@swc/core").JsMinifyOptions & { sourceMap: undefined }}
*/
const buildSwcOptions = (swcOptions = {}) => {
// Need deep copy objects to avoid https://github.com/terser/terser/issues/366
return { ...swcOptions,
compress: typeof swcOptions.compress === "boolean" ? swcOptions.compress : { ...swcOptions.compress
},
mangle: swcOptions.mangle == null ? true : typeof swcOptions.mangle === "boolean" ? swcOptions.mangle : { ...swcOptions.mangle
},
// ecma: swcOptions.ecma,
// keep_classnames: swcOptions.keep_classnames,
// keep_fnames: swcOptions.keep_fnames,
// module: swcOptions.module,
// safari10: swcOptions.safari10,
// toplevel: swcOptions.toplevel
// eslint-disable-next-line no-undefined
sourceMap: undefined
};
}; // eslint-disable-next-line import/no-extraneous-dependencies, global-require
const swc = require("@swc/core"); // Copy `swc` options
const swcOptions = buildSwcOptions(minimizerOptions); // Let `swc` generate a SourceMap
if (sourceMap) {
// @ts-ignore
swcOptions.sourceMap = true;
}
const [[filename, code]] = Object.entries(input);
const result = await swc.minify(code, swcOptions);
let map;
if (result.map) {
map = JSON.parse(result.map); // TODO workaround for swc because `filename` is not preset as in `swc` signature as for `terser`
map.sources = [filename];
delete map.sourcesContent;
}
return {
code: result.code,
map
};
}
/**
* @returns {string | undefined}
*/
swcMinify.getMinimizerVersion = () => {
let packageJson;
try {
// eslint-disable-next-line global-require, import/no-extraneous-dependencies
packageJson = require("@swc/core/package.json");
} catch (error) {// Ignore
}
return packageJson && packageJson.version;
};
/* istanbul ignore next */
/**
* @param {Input} input
* @param {RawSourceMap | 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 `swc` options
const esbuildOptions = buildEsbuildOptions(minimizerOptions); // Let `swc` 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 ? result.warnings.map(item => item.toString()) : []
};
}
/**
* @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;
};