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EvalDevToolModulePlugin.js
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Mon, Nov 18, 08:43

EvalDevToolModulePlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { ConcatSource, RawSource } = require("webpack-sources");
const ModuleFilenameHelpers = require("./ModuleFilenameHelpers");
const JavascriptModulesPlugin = require("./javascript/JavascriptModulesPlugin");
/** @typedef {import("webpack-sources").Source} Source */
/** @typedef {import("./Compiler")} Compiler */
/** @type {WeakMap<Source, Source>} */
const cache = new WeakMap();
const devtoolWarning = new RawSource(`/*
* ATTENTION: The "eval" devtool has been used (maybe by default in mode: "development").
* This devtool is not neither made for production nor for readable output files.
* It uses "eval()" calls to create a separate source file in the browser devtools.
* If you are trying to read the output file, select a different devtool (https://webpack.js.org/configuration/devtool/)
* or disable the default devtool with "devtool: false".
* If you are looking for production-ready output files, see mode: "production" (https://webpack.js.org/configuration/mode/).
*/
`);
class EvalDevToolModulePlugin {
constructor(options) {
this.namespace = options.namespace || "";
this.sourceUrlComment = options.sourceUrlComment || "\n//# sourceURL=[url]";
this.moduleFilenameTemplate =
options.moduleFilenameTemplate ||
"webpack://[namespace]/[resourcePath]?[loaders]";
}
/**
* Apply the plugin
* @param {Compiler} compiler the compiler instance
* @returns {void}
*/
apply(compiler) {
compiler.hooks.compilation.tap("EvalDevToolModulePlugin", compilation => {
const hooks = JavascriptModulesPlugin.getCompilationHooks(compilation);
hooks.renderModuleContent.tap(
"EvalDevToolModulePlugin",
(source, module, { runtimeTemplate, chunkGraph }) => {
const cacheEntry = cache.get(source);
if (cacheEntry !== undefined) return cacheEntry;
const content = source.source();
const str = ModuleFilenameHelpers.createFilename(
module,
{
moduleFilenameTemplate: this.moduleFilenameTemplate,
namespace: this.namespace
},
{
requestShortener: runtimeTemplate.requestShortener,
chunkGraph
}
);
const footer =
"\n" +
this.sourceUrlComment.replace(
/\[url\]/g,
encodeURI(str)
.replace(/%2F/g, "/")
.replace(/%20/g, "_")
.replace(/%5E/g, "^")
.replace(/%5C/g, "\\")
.replace(/^\//, "")
);
const result = new RawSource(
`eval(${JSON.stringify(content + footer)});`
);
cache.set(source, result);
return result;
}
);
hooks.render.tap(
"EvalDevToolModulePlugin",
source => new ConcatSource(devtoolWarning, source)
);
hooks.chunkHash.tap("EvalDevToolModulePlugin", (chunk, hash) => {
hash.update("EvalDevToolModulePlugin");
hash.update("2");
});
});
}
}
module.exports = EvalDevToolModulePlugin;

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