63 lines
1.9 KiB
JavaScript
63 lines
1.9 KiB
JavaScript
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/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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// @ts-check
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const fs = require('fs');
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const webpack = require('webpack');
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const fancyLog = require('fancy-log');
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const ansiColors = require('ansi-colors');
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const { Mangler } = require('../build/lib/mangle/index');
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/**
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* Map of project paths to mangled file contents
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*
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* @type {Map<string, Promise<Map<string, { out: string; sourceMap?: string }>>>}
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*/
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const mangleMap = new Map();
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/**
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* @param {string} projectPath
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*/
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function getMangledFileContents(projectPath) {
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let entry = mangleMap.get(projectPath);
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if (!entry) {
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const log = (...data) => fancyLog(ansiColors.blue('[mangler]'), ...data);
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log(`Mangling ${projectPath}`);
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const ts2tsMangler = new Mangler(projectPath, log, { mangleExports: true, manglePrivateFields: true });
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entry = ts2tsMangler.computeNewFileContents();
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mangleMap.set(projectPath, entry);
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}
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return entry;
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}
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/**
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* @type {webpack.LoaderDefinitionFunction}
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*/
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module.exports = async function (source, sourceMap, meta) {
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if (this.mode !== 'production') {
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// Only enable mangling in production builds
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return source;
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}
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const options = this.getOptions();
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if (options.disabled) {
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// Dynamically disabled
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return source;
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}
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if (source !== fs.readFileSync(this.resourcePath).toString()) {
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// File content has changed by previous webpack steps.
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// Skip mangling.
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return source;
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}
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const callback = this.async();
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const fileContentsMap = await getMangledFileContents(options.configFile);
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const newContents = fileContentsMap.get(this.resourcePath);
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callback(null, newContents?.out ?? source, sourceMap, meta);
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};
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