130 lines
3.5 KiB
JavaScript
130 lines
3.5 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const { RawSource } = require("webpack-sources");
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const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
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/** @typedef {import("webpack-sources").Source} Source */
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/** @typedef {import("./ModuleTemplate")} ModuleTemplate */
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/** @type {WeakMap<Source, Source>} */
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const cache = new WeakMap();
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class EvalSourceMapDevToolModuleTemplatePlugin {
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constructor(compilation, options) {
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this.compilation = compilation;
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this.sourceMapComment =
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options.append || "//# sourceURL=[module]\n//# sourceMappingURL=[url]";
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this.moduleFilenameTemplate =
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options.moduleFilenameTemplate ||
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"webpack://[namespace]/[resource-path]?[hash]";
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this.namespace = options.namespace || "";
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this.options = options;
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}
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/**
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* @param {ModuleTemplate} moduleTemplate the module template
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* @returns {void}
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*/
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apply(moduleTemplate) {
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const options = this.options;
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const matchModule = ModuleFilenameHelpers.matchObject.bind(
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ModuleFilenameHelpers,
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options
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);
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moduleTemplate.hooks.module.tap(
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"EvalSourceMapDevToolModuleTemplatePlugin",
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(source, module) => {
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const cachedSource = cache.get(source);
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if (cachedSource !== undefined) {
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return cachedSource;
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}
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if (!matchModule(module.resource)) {
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return source;
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}
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const chunkGraph = this.compilation.chunkGraph;
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/** @type {{ [key: string]: TODO; }} */
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let sourceMap;
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let content;
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if (source.sourceAndMap) {
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const sourceAndMap = source.sourceAndMap(options);
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sourceMap = sourceAndMap.map;
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content = sourceAndMap.source;
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} else {
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sourceMap = source.map(options);
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content = source.source();
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}
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if (!sourceMap) {
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return source;
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}
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// Clone (flat) the sourcemap to ensure that the mutations below do not persist.
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sourceMap = Object.keys(sourceMap).reduce((obj, key) => {
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obj[key] = sourceMap[key];
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return obj;
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}, {});
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const modules = sourceMap.sources.map(source => {
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const module = this.compilation.findModule(source);
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return module || source;
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});
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let moduleFilenames = modules.map(module => {
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return ModuleFilenameHelpers.createFilename(
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module,
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{
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moduleFilenameTemplate: this.moduleFilenameTemplate,
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namespace: this.namespace
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},
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{
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requestShortener: moduleTemplate.runtimeTemplate.requestShortener,
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chunkGraph
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}
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);
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});
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moduleFilenames = ModuleFilenameHelpers.replaceDuplicates(
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moduleFilenames,
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(filename, i, n) => {
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for (let j = 0; j < n; j++) filename += "*";
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return filename;
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}
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);
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sourceMap.sources = moduleFilenames;
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sourceMap.sourceRoot = options.sourceRoot || "";
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const moduleId = chunkGraph.getModuleId(module);
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sourceMap.file = `${moduleId}.js`;
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const footer =
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this.sourceMapComment.replace(
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/\[url\]/g,
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`data:application/json;charset=utf-8;base64,${Buffer.from(
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JSON.stringify(sourceMap),
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"utf8"
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).toString("base64")}`
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) + `\n//# sourceURL=webpack-internal:///${moduleId}\n`; // workaround for chrome bug
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const evalSource = new RawSource(
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`eval(${JSON.stringify(content + footer)});`
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);
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cache.set(source, evalSource);
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return evalSource;
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}
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);
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moduleTemplate.hooks.hash.tap(
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"EvalSourceMapDevToolModuleTemplatePlugin",
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hash => {
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hash.update("eval-source-map");
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hash.update("2");
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}
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);
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}
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}
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module.exports = EvalSourceMapDevToolModuleTemplatePlugin;
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