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4 years ago
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _path = _interopRequireDefault(require("path"));
var _sourceMap = require("source-map");
var _webpackSources = require("webpack-sources");
var _RequestShortener = _interopRequireDefault(require("webpack/lib/RequestShortener"));
var _webpack = require("webpack");
var _schemaUtils = _interopRequireDefault(require("schema-utils"));
var _serializeJavascript = _interopRequireDefault(require("serialize-javascript"));
var _package = _interopRequireDefault(require("terser/package.json"));
var _options = _interopRequireDefault(require("./options.json"));
var _TaskRunner = _interopRequireDefault(require("./TaskRunner"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const warningRegex = /\[.+:([0-9]+),([0-9]+)\]/;
class TerserPlugin {
constructor(options = {}) {
(0, _schemaUtils.default)(_options.default, options, {
name: 'Terser Plugin',
baseDataPath: 'options'
});
const {
minify,
terserOptions = {},
test = /\.m?js(\?.*)?$/i,
chunkFilter = () => true,
warningsFilter = () => true,
extractComments = true,
sourceMap,
cache = true,
cacheKeys = defaultCacheKeys => defaultCacheKeys,
parallel = true,
include,
exclude
} = options;
this.options = {
test,
chunkFilter,
warningsFilter,
extractComments,
sourceMap,
cache,
cacheKeys,
parallel,
include,
exclude,
minify,
terserOptions
};
}
static isSourceMap(input) {
// All required options for `new SourceMapConsumer(...options)`
// https://github.com/mozilla/source-map#new-sourcemapconsumerrawsourcemap
return Boolean(input && input.version && input.sources && Array.isArray(input.sources) && typeof input.mappings === 'string');
}
static buildSourceMap(inputSourceMap) {
if (!inputSourceMap || !TerserPlugin.isSourceMap(inputSourceMap)) {
return null;
}
return new _sourceMap.SourceMapConsumer(inputSourceMap);
}
static buildError(error, file, sourceMap, requestShortener) {
// Handling error which should have line, col, filename and message
if (error.line) {
const original = sourceMap && sourceMap.originalPositionFor({
line: error.line,
column: error.col
});
if (original && original.source && requestShortener) {
return new Error(`${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}`);
}
static buildWarning(warning, file, sourceMap, requestShortener, warningsFilter) {
let warningMessage = warning;
let locationMessage = '';
let source = null;
if (sourceMap) {
const match = warningRegex.exec(warning);
if (match) {
const line = +match[1];
const column = +match[2];
const original = sourceMap.originalPositionFor({
line,
column
});
if (original && original.source && original.source !== file && requestShortener) {
({
source
} = original);
warningMessage = `${warningMessage.replace(warningRegex, '')}`;
locationMessage = `[${requestShortener.shorten(original.source)}:${original.line},${original.column}]`;
}
}
} // Todo change order in next major release
if (warningsFilter && !warningsFilter(warning, source, file)) {
return null;
}
return `Terser Plugin: ${warningMessage}${locationMessage}`;
}
static removeQueryString(filename) {
let targetFilename = filename;
const queryStringIdx = targetFilename.indexOf('?');
if (queryStringIdx >= 0) {
targetFilename = targetFilename.substr(0, queryStringIdx);
}
return targetFilename;
}
static hasAsset(commentFilename, assets) {
const assetFilenames = Object.keys(assets).map(assetFilename => TerserPlugin.removeQueryString(assetFilename));
return assetFilenames.includes(TerserPlugin.removeQueryString(commentFilename));
}
static isWebpack4() {
return _webpack.version[0] === '4';
}
*taskGenerator(compiler, compilation, allExtractedComments, file) {
let inputSourceMap;
const asset = compilation.assets[file];
try {
let input;
if (this.options.sourceMap && asset.sourceAndMap) {
const {
source,
map
} = asset.sourceAndMap();
input = source;
if (TerserPlugin.isSourceMap(map)) {
inputSourceMap = map;
} else {
inputSourceMap = map;
compilation.warnings.push(new Error(`${file} contains invalid source map`));
}
} else {
input = asset.source();
inputSourceMap = null;
} // Handling comment extraction
let commentsFilename = false;
if (this.options.extractComments) {
commentsFilename = this.options.extractComments.filename || '[file].LICENSE.txt[query]';
if (TerserPlugin.isWebpack4()) {
// Todo remove this in next major release
if (typeof commentsFilename === 'function') {
commentsFilename = commentsFilename.bind(null, file);
}
}
let query = '';
let filename = file;
const querySplit = filename.indexOf('?');
if (querySplit >= 0) {
query = filename.substr(querySplit);
filename = filename.substr(0, querySplit);
}
const lastSlashIndex = filename.lastIndexOf('/');
const basename = lastSlashIndex === -1 ? filename : filename.substr(lastSlashIndex + 1);
const data = {
filename,
basename,
query
};
commentsFilename = compilation.getPath(commentsFilename, data);
}
if (commentsFilename && TerserPlugin.hasAsset(commentsFilename, compilation.assets)) {
// Todo make error and stop uglifing in next major release
compilation.warnings.push(new Error(`The comment file "${TerserPlugin.removeQueryString(commentsFilename)}" conflicts with an existing asset, this may lead to code corruption, please use a different name`));
}
const callback = taskResult => {
let {
code
} = taskResult;
const {
error,
map,
warnings
} = taskResult;
const {
extractedComments
} = taskResult;
let sourceMap = null;
if (error || warnings && warnings.length > 0) {
sourceMap = TerserPlugin.buildSourceMap(inputSourceMap);
} // Handling results
// Error case: add errors, and go to next file
if (error) {
compilation.errors.push(TerserPlugin.buildError(error, file, sourceMap, new _RequestShortener.default(compiler.context)));
return;
}
const hasExtractedComments = commentsFilename && extractedComments && extractedComments.length > 0;
const hasBannerForExtractedComments = hasExtractedComments && this.options.extractComments.banner !== false;
let outputSource;
let shebang;
if (hasExtractedComments && hasBannerForExtractedComments && code.startsWith('#!')) {
const firstNewlinePosition = code.indexOf('\n');
shebang = code.substring(0, firstNewlinePosition);
code = code.substring(firstNewlinePosition + 1);
}
if (map) {
outputSource = new _webpackSources.SourceMapSource(code, file, map, input, inputSourceMap, true);
} else {
outputSource = new _webpackSources.RawSource(code);
} // Write extracted comments to commentsFilename
if (hasExtractedComments) {
if (!allExtractedComments[commentsFilename]) {
// eslint-disable-next-line no-param-reassign
allExtractedComments[commentsFilename] = [];
} // eslint-disable-next-line no-param-reassign
allExtractedComments[commentsFilename] = allExtractedComments[commentsFilename].concat(extractedComments); // Add a banner to the original file
if (hasBannerForExtractedComments) {
let banner = this.options.extractComments.banner || `For license information please see ${_path.default.relative(_path.default.dirname(file), commentsFilename).replace(/\\/g, '/')}`;
if (typeof banner === 'function') {
banner = banner(commentsFilename);
}
if (banner) {
outputSource = new _webpackSources.ConcatSource(shebang ? `${shebang}\n` : '', `/*! ${banner} */\n`, outputSource);
}
}
} // Updating assets
// eslint-disable-next-line no-param-reassign
compilation.assets[file] = outputSource; // Handling warnings
if (warnings && warnings.length > 0) {
warnings.forEach(warning => {
const builtWarning = TerserPlugin.buildWarning(warning, file, sourceMap, new _RequestShortener.default(compiler.context), this.options.warningsFilter);
if (builtWarning) {
compilation.warnings.push(builtWarning);
}
});
}
};
const task = {
asset,
file,
input,
inputSourceMap,
commentsFilename,
extractComments: this.options.extractComments,
terserOptions: this.options.terserOptions,
minify: this.options.minify,
callback
};
if (TerserPlugin.isWebpack4()) {
const {
outputOptions: {
hashSalt,
hashDigest,
hashDigestLength,
hashFunction
}
} = compilation;
const hash = _webpack.util.createHash(hashFunction);
if (hashSalt) {
hash.update(hashSalt);
}
hash.update(input);
const digest = hash.digest(hashDigest);
if (this.options.cache) {
const defaultCacheKeys = {
terser: _package.default.version,
// eslint-disable-next-line global-require
'terser-webpack-plugin': require('../package.json').version,
'terser-webpack-plugin-options': this.options,
nodeVersion: process.version,
filename: file,
contentHash: digest.substr(0, hashDigestLength)
};
task.cacheKeys = this.options.cacheKeys(defaultCacheKeys, file);
}
} else {
task.cacheKeys = {
terser: _package.default.version,
// eslint-disable-next-line global-require
'terser-webpack-plugin': require('../package.json').version,
'terser-webpack-plugin-options': this.options
};
}
yield task;
} catch (error) {
compilation.errors.push(TerserPlugin.buildError(error, file, TerserPlugin.buildSourceMap(inputSourceMap), new _RequestShortener.default(compiler.context)));
}
}
apply(compiler) {
const {
devtool,
output,
plugins
} = compiler.options;
this.options.sourceMap = typeof this.options.sourceMap === 'undefined' ? devtool && !devtool.includes('eval') && !devtool.includes('cheap') && (devtool.includes('source-map') || // Todo remove when `webpack@5` support will be dropped
devtool.includes('sourcemap')) || plugins && plugins.some(plugin => plugin instanceof _webpack.SourceMapDevToolPlugin && plugin.options && plugin.options.columns) : Boolean(this.options.sourceMap);
if (typeof this.options.terserOptions.module === 'undefined' && typeof output.module !== 'undefined') {
this.options.terserOptions.module = output.module;
}
if (typeof this.options.terserOptions.ecma === 'undefined' && typeof output.ecmaVersion !== 'undefined') {
this.options.terserOptions.ecma = output.ecmaVersion;
}
const optimizeFn = async (compilation, chunks) => {
const matchObject = _webpack.ModuleFilenameHelpers.matchObject.bind( // eslint-disable-next-line no-undefined
undefined, this.options);
const files = [].concat(Array.from(compilation.additionalChunkAssets || [])).concat(Array.from(chunks).filter(chunk => this.options.chunkFilter && this.options.chunkFilter(chunk)).reduce((acc, chunk) => acc.concat(Array.from(chunk.files || [])), [])).filter(file => matchObject(file));
if (files.length === 0) {
return Promise.resolve();
}
const CacheEngine = TerserPlugin.isWebpack4() ? // eslint-disable-next-line global-require
require('./Webpack4Cache').default : // eslint-disable-next-line global-require
require('./Webpack5Cache').default;
const allExtractedComments = {};
const taskGenerator = this.taskGenerator.bind(this, compiler, compilation, allExtractedComments);
const taskRunner = new _TaskRunner.default({
taskGenerator,
files,
cache: new CacheEngine(compiler, compilation, this.options),
parallel: this.options.parallel
});
await taskRunner.run();
await taskRunner.exit();
Object.keys(allExtractedComments).forEach(commentsFilename => {
const extractedComments = new Set([...allExtractedComments[commentsFilename].sort()]); // eslint-disable-next-line no-param-reassign
compilation.assets[commentsFilename] = new _webpackSources.RawSource(`${Array.from(extractedComments).join('\n\n')}\n`);
});
return Promise.resolve();
};
const plugin = {
name: this.constructor.name
};
compiler.hooks.compilation.tap(plugin, compilation => {
if (this.options.sourceMap) {
compilation.hooks.buildModule.tap(plugin, moduleArg => {
// to get detailed location info about errors
// eslint-disable-next-line no-param-reassign
moduleArg.useSourceMap = true;
});
}
if (!TerserPlugin.isWebpack4()) {
const hooks = _webpack.javascript.JavascriptModulesPlugin.getCompilationHooks(compilation);
const data = (0, _serializeJavascript.default)({
terser: _package.default.version,
terserOptions: this.options.terserOptions
});
hooks.chunkHash.tap(plugin, (chunk, hash) => {
hash.update('TerserPlugin');
hash.update(data);
});
} else {
// Todo remove after drop `webpack@4` compatibility
const {
mainTemplate,
chunkTemplate
} = compilation;
const data = (0, _serializeJavascript.default)({
terser: _package.default.version,
terserOptions: this.options.terserOptions
}); // Regenerate `contenthash` for minified assets
for (const template of [mainTemplate, chunkTemplate]) {
template.hooks.hashForChunk.tap(plugin, hash => {
hash.update('TerserPlugin');
hash.update(data);
});
}
}
compilation.hooks.optimizeChunkAssets.tapPromise(plugin, optimizeFn.bind(this, compilation));
});
}
}
var _default = TerserPlugin;
exports.default = _default;