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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var path = _interopRequireWildcard(require("path"));
var os = _interopRequireWildcard(require("os"));
var _sourceMap = require("source-map");
var _schemaUtils = require("schema-utils");
var _serializeJavascript = _interopRequireDefault(require("serialize-javascript"));
var terserPackageJson = _interopRequireWildcard(require("terser/package.json"));
var _pLimit = _interopRequireDefault(require("p-limit"));
var _jestWorker = require("jest-worker");
var schema = _interopRequireWildcard(require("./options.json"));
var _minify = require("./minify");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
/** @typedef {import("schema-utils/declarations/validate").Schema} Schema */
/** @typedef {import("webpack").Compiler} Compiler */
/** @typedef {import("webpack").Compilation} Compilation */
/** @typedef {import("webpack").WebpackError} WebpackError */
/** @typedef {import("webpack").Asset} Asset */
/** @typedef {import("terser").ECMA} TerserECMA */
/** @typedef {import("terser").MinifyOptions} TerserMinifyOptions */
/** @typedef {import("jest-worker").Worker} JestWorker */
/** @typedef {import("source-map").RawSourceMap} RawSourceMap */
/** @typedef {import("./minify.js").InternalMinifyOptions} InternalMinifyOptions */
/** @typedef {import("./minify.js").InternalMinifyResult} InternalMinifyResult */
/** @typedef {import("./minify.js").CustomMinifyOptions} CustomMinifyOptions */
/** @typedef {RegExp | string} Rule */
/** @typedef {Rule[] | Rule} Rules */
/** @typedef {JestWorker & { transform: (options: string) => InternalMinifyResult, minify: (options: InternalMinifyOptions) => InternalMinifyResult }} MinifyWorker */
/**
* @callback ExtractCommentsFunction
* @param {any} astNode
* @param {{ value: string, type: 'comment1' | 'comment2' | 'comment3' | 'comment4', pos: number, line: number, col: number }} comment
* @returns {boolean}
*/
/**
* @typedef {boolean | string | RegExp | ExtractCommentsFunction} ExtractCommentsCondition
*/
/**
* @typedef {string | ((fileData: any) => string)} ExtractCommentsFilename
*/
/**
* @typedef {boolean | string | ((commentsFile: string) => string)} ExtractCommentsBanner
*/
/**
* @typedef {Object} ExtractCommentsObject
* @property {ExtractCommentsCondition} condition
* @property {ExtractCommentsFilename} filename
* @property {ExtractCommentsBanner} banner
*/
/**
* @callback CustomMinifyFunction
* @param {{ [file: string]: string }} fileAndCode
* @param {RawSourceMap} [sourceMap]
* @param {Object.<any, any>} minifyOptions
*/
/**
* @typedef {ExtractCommentsCondition | ExtractCommentsObject} ExtractCommentsOptions
*/
/**
* @typedef {Object} PluginWithTerserOptions
* @property {Rules} [test]
* @property {Rules} [include]
* @property {Rules} [exclude]
* @property {TerserMinifyOptions} [terserOptions]
* @property {ExtractCommentsOptions} [extractComments]
* @property {boolean} [parallel]
* @property {CustomMinifyFunction} [minify]
*/
/**
* @typedef {Object} PluginWithCustomMinifyOptions
* @property {Rules} [test]
* @property {Rules} [include]
* @property {Rules} [exclude]
* @property {Object.<any, any>} [terserOptions]
* @property {ExtractCommentsOptions} [extractComments]
* @property {boolean} [parallel]
* @property {CustomMinifyFunction} [minify]
*/
/**
* @typedef {PluginWithTerserOptions | PluginWithCustomMinifyOptions} TerserPluginOptions
*/
class TerserPlugin {
/**
* @param {TerserPluginOptions} options
*/
constructor(options = {}) {
(0, _schemaUtils.validate)(
/** @type {Schema} */
schema, options, {
name: "Terser Plugin",
baseDataPath: "options"
});
const {
minify,
terserOptions = {},
test = /\.[cm]?js(\?.*)?$/i,
extractComments = true,
parallel = true,
include,
exclude
} = options;
this.options = {
test,
extractComments,
parallel,
include,
exclude,
minify,
terserOptions
};
}
/**
* @private
* @param {any} input
* @returns {boolean}
*/
static isSourceMap(input) {
// All required options for `new SourceMapConsumer(...options)`
// https://github.com/mozilla/source-map#new-sourcemapconsumerrawsourcemap
return Boolean(input && input.version && input.sources && Array.isArray(input.sources) && typeof input.mappings === "string");
}
/**
* @private
* @param {Error & { line: number, col: number}} error
* @param {string} file
* @param {Compilation["requestShortener"]} [requestShortener]
* @param {SourceMapConsumer} [sourceMap]
* @returns {Error}
*/
static buildError(error, file, requestShortener, sourceMap) {
if (error.line) {
const original = sourceMap && sourceMap.originalPositionFor({
line: error.line,
column: error.col
});
if (original && original.source && requestShortener) {
return new Error(`${file} from Terser\n${error.message} [${requestShortener.shorten(original.source)}:${original.line},${original.column}][${file}:${error.line},${error.col}]${error.stack ? `\n${error.stack.split("\n").slice(1).join("\n")}` : ""}`);
}
return new Error(`${file} from Terser\n${error.message} [${file}:${error.line},${error.col}]${error.stack ? `\n${error.stack.split("\n").slice(1).join("\n")}` : ""}`);
}
if (error.stack) {
return new Error(`${file} from Terser\n${error.stack}`);
}
return new Error(`${file} from Terser\n${error.message}`);
}
/**
* @private
* @param {boolean} parallel
* @returns {number}
*/
static getAvailableNumberOfCores(parallel) {
// In some cases cpus() returns undefined
// https://github.com/nodejs/node/issues/19022
const cpus = os.cpus() || {
length: 1
};
return parallel === true ? cpus.length - 1 : Math.min(Number(parallel) || 0, cpus.length - 1);
}
/**
* @param {Compiler} compiler
* @param {Compilation} compilation
* @param {Record<string, import("webpack").sources.Source>} assets
* @param {{availableNumberOfCores: number}} optimizeOptions
* @returns {Promise<void>}
*/
async optimize(compiler, compilation, assets, optimizeOptions) {
const cache = compilation.getCache("TerserWebpackPlugin");
let numberOfAssetsForMinify = 0;
const assetsForMinify = await Promise.all(Object.keys(assets).filter(name => {
const {
info
} =
/** @type {Asset} */
compilation.getAsset(name);
if ( // Skip double minimize assets from child compilation
info.minimized || // Skip minimizing for extracted comments assets
info.extractedComments) {
return false;
}
if (!compiler.webpack.ModuleFilenameHelpers.matchObject.bind( // eslint-disable-next-line no-undefined
undefined, this.options)(name)) {
return false;
}
return true;
}).map(async name => {
const {
info,
source
} =
/** @type {Asset} */
compilation.getAsset(name);
const eTag = cache.getLazyHashedEtag(source);
const cacheItem = cache.getItemCache(name, eTag);
const output = await cacheItem.getPromise();
if (!output) {
numberOfAssetsForMinify += 1;
}
return {
name,
info,
inputSource: source,
output,
cacheItem
};
}));
/** @type {undefined | (() => MinifyWorker)} */
let getWorker;
/** @type {undefined | MinifyWorker} */
let initializedWorker;
/** @type {undefined | number} */
let numberOfWorkers;
if (optimizeOptions.availableNumberOfCores > 0) {
// Do not create unnecessary workers when the number of files is less than the available cores, it saves memory
numberOfWorkers = Math.min(numberOfAssetsForMinify, optimizeOptions.availableNumberOfCores); // eslint-disable-next-line consistent-return
getWorker = () => {
if (initializedWorker) {
return initializedWorker;
}
initializedWorker =
/** @type {MinifyWorker} */
new _jestWorker.Worker(require.resolve("./minify"), {
numWorkers: numberOfWorkers,
enableWorkerThreads: true
}); // https://github.com/facebook/jest/issues/8872#issuecomment-524822081
const workerStdout = initializedWorker.getStdout();
if (workerStdout) {
workerStdout.on("data", chunk => process.stdout.write(chunk));
}
const workerStderr = initializedWorker.getStderr();
if (workerStderr) {
workerStderr.on("data", chunk => process.stderr.write(chunk));
}
return initializedWorker;
};
}
const limit = (0, _pLimit.default)(getWorker && numberOfAssetsForMinify > 0 ?
/** @type {number} */
numberOfWorkers : Infinity);
const {
SourceMapSource,
ConcatSource,
RawSource
} = compiler.webpack.sources;
/** @typedef {{ extractedCommentsSource : import("webpack").sources.RawSource, commentsFilename: string }} ExtractedCommentsInfo */
/** @type {Map<string, ExtractedCommentsInfo>} */
const allExtractedComments = new Map();
const scheduledTasks = [];
for (const asset of assetsForMinify) {
scheduledTasks.push(limit(async () => {
const {
name,
inputSource,
info,
cacheItem
} = asset;
let {
output
} = asset;
if (!output) {
let input;
/** @type {RawSourceMap | undefined} */
let inputSourceMap;
const {
source: sourceFromInputSource,
map
} = inputSource.sourceAndMap();
input = sourceFromInputSource;
if (map) {
if (TerserPlugin.isSourceMap(map)) {
inputSourceMap =
/** @type {RawSourceMap} */
map;
} else {
inputSourceMap =
/** @type {RawSourceMap} */
map;
compilation.warnings.push(
/** @type {WebpackError} */
new Error(`${name} contains invalid source map`));
}
}
if (Buffer.isBuffer(input)) {
input = input.toString();
}
/** @type {InternalMinifyOptions} */
const options = {
name,
input,
inputSourceMap,
minify: this.options.minify,
minifyOptions: { ...this.options.terserOptions
},
extractComments: this.options.extractComments
};
if (typeof options.minifyOptions.module === "undefined") {
if (typeof info.javascriptModule !== "undefined") {
options.minifyOptions.module = info.javascriptModule;
} else if (/\.mjs(\?.*)?$/i.test(name)) {
options.minifyOptions.module = true;
} else if (/\.cjs(\?.*)?$/i.test(name)) {
options.minifyOptions.module = false;
}
}
try {
output = await (getWorker ? getWorker().transform((0, _serializeJavascript.default)(options)) : (0, _minify.minify)(options));
} catch (error) {
const hasSourceMap = inputSourceMap && TerserPlugin.isSourceMap(inputSourceMap);
compilation.errors.push(
/** @type {WebpackError} */
TerserPlugin.buildError(error, name, // eslint-disable-next-line no-undefined
hasSourceMap ? compilation.requestShortener : undefined, hasSourceMap ? new _sourceMap.SourceMapConsumer(
/** @type {RawSourceMap} */
inputSourceMap) : // eslint-disable-next-line no-undefined
undefined));
return;
}
let shebang;
if (
/** @type {ExtractCommentsObject} */
this.options.extractComments.banner !== false && output.extractedComments && output.extractedComments.length > 0 && output.code.startsWith("#!")) {
const firstNewlinePosition = output.code.indexOf("\n");
shebang = output.code.substring(0, firstNewlinePosition);
output.code = output.code.substring(firstNewlinePosition + 1);
}
if (output.map) {
output.source = new SourceMapSource(output.code, name, output.map, input,
/** @type {RawSourceMap} */
inputSourceMap, true);
} else {
output.source = new RawSource(output.code);
}
if (output.extractedComments && output.extractedComments.length > 0) {
const commentsFilename =
/** @type {ExtractCommentsObject} */
this.options.extractComments.filename || "[file].LICENSE.txt[query]";
let query = "";
let filename = name;
const querySplit = filename.indexOf("?");
if (querySplit >= 0) {
query = filename.substr(querySplit);
filename = filename.substr(0, querySplit);
}
const lastSlashIndex = filename.lastIndexOf("/");
const basename = lastSlashIndex === -1 ? filename : filename.substr(lastSlashIndex + 1);
const data = {
filename,
basename,
query
};
output.commentsFilename = compilation.getPath(commentsFilename, data);
let banner; // Add a banner to the original file
if (
/** @type {ExtractCommentsObject} */
this.options.extractComments.banner !== false) {
banner =
/** @type {ExtractCommentsObject} */
this.options.extractComments.banner || `For license information please see ${path.relative(path.dirname(name), output.commentsFilename).replace(/\\/g, "/")}`;
if (typeof banner === "function") {
banner = banner(output.commentsFilename);
}
if (banner) {
output.source = new ConcatSource(shebang ? `${shebang}\n` : "", `/*! ${banner} */\n`, output.source);
}
}
const extractedCommentsString = output.extractedComments.sort().join("\n\n");
output.extractedCommentsSource = new RawSource(`${extractedCommentsString}\n`);
}
await cacheItem.storePromise({
source: output.source,
commentsFilename: output.commentsFilename,
extractedCommentsSource: output.extractedCommentsSource
});
}
/** @type {Record<string, any>} */
const newInfo = {
minimized: true
};
const {
source,
extractedCommentsSource
} = output; // Write extracted comments to commentsFilename
if (extractedCommentsSource) {
const {
commentsFilename
} = output;
newInfo.related = {
license: commentsFilename
};
allExtractedComments.set(name, {
extractedCommentsSource,
commentsFilename
});
}
compilation.updateAsset(name, source, newInfo);
}));
}
await Promise.all(scheduledTasks);
if (initializedWorker) {
await initializedWorker.end();
}
/** @typedef {{ source: import("webpack").sources.Source, commentsFilename: string, from: string }} ExtractedCommentsInfoWIthFrom */
await Array.from(allExtractedComments).sort().reduce(
/**
* @param {Promise<unknown>} previousPromise
* @param {[string, ExtractedCommentsInfo]} extractedComments
* @returns {Promise<ExtractedCommentsInfoWIthFrom>}
*/
async (previousPromise, [from, value]) => {
const previous =
/** @type {ExtractedCommentsInfoWIthFrom | undefined} **/
await previousPromise;
const {
commentsFilename,
extractedCommentsSource
} = value;
if (previous && previous.commentsFilename === commentsFilename) {
const {
from: previousFrom,
source: prevSource
} = previous;
const mergedName = `${previousFrom}|${from}`;
const name = `${commentsFilename}|${mergedName}`;
const eTag = [prevSource, extractedCommentsSource].map(item => cache.getLazyHashedEtag(item)).reduce((previousValue, currentValue) => cache.mergeEtags(previousValue, currentValue));
let source = await cache.getPromise(name, eTag);
if (!source) {
source = new ConcatSource(Array.from(new Set([...
/** @type {string}*/
prevSource.source().split("\n\n"), ...
/** @type {string}*/
extractedCommentsSource.source().split("\n\n")])).join("\n\n"));
await cache.storePromise(name, eTag, source);
}
compilation.updateAsset(commentsFilename, source);
return {
source,
commentsFilename,
from: mergedName
};
}
const existingAsset = compilation.getAsset(commentsFilename);
if (existingAsset) {
return {
source: existingAsset.source,
commentsFilename,
from: commentsFilename
};
}
compilation.emitAsset(commentsFilename, extractedCommentsSource, {
extractedComments: true
});
return {
source: extractedCommentsSource,
commentsFilename,
from
};
},
/** @type {Promise<unknown>} */
Promise.resolve());
}
/**
* @private
* @param {any} environment
* @returns {TerserECMA}
*/
static getEcmaVersion(environment) {
// ES 6th
if (environment.arrowFunction || environment.const || environment.destructuring || environment.forOf || environment.module) {
return 2015;
} // ES 11th
if (environment.bigIntLiteral || environment.dynamicImport) {
return 2020;
}
return 5;
}
/**
* @param {Compiler} compiler
* @returns {void}
*/
apply(compiler) {
const {
output
} = compiler.options;
if (typeof this.options.terserOptions.ecma === "undefined") {
this.options.terserOptions.ecma = TerserPlugin.getEcmaVersion(output.environment || {});
}
const pluginName = this.constructor.name;
const availableNumberOfCores = TerserPlugin.getAvailableNumberOfCores(this.options.parallel);
compiler.hooks.compilation.tap(pluginName, compilation => {
const hooks = compiler.webpack.javascript.JavascriptModulesPlugin.getCompilationHooks(compilation);
const data = (0, _serializeJavascript.default)({
terser: terserPackageJson.version,
terserOptions: this.options.terserOptions
});
hooks.chunkHash.tap(pluginName, (chunk, hash) => {
hash.update("TerserPlugin");
hash.update(data);
});
compilation.hooks.processAssets.tapPromise({
name: pluginName,
stage: compiler.webpack.Compilation.PROCESS_ASSETS_STAGE_OPTIMIZE_SIZE,
additionalAssets: true
}, assets => this.optimize(compiler, compilation, assets, {
availableNumberOfCores
}));
compilation.hooks.statsPrinter.tap(pluginName, stats => {
stats.hooks.print.for("asset.info.minimized").tap("terser-webpack-plugin", (minimized, {
green,
formatFlag
}) => minimized ?
/** @type {Function} */
green(
/** @type {Function} */
formatFlag("minimized")) : "");
});
});
}
}
var _default = TerserPlugin;
exports.default = _default;