source: trip-planner-front/node_modules/webpack/lib/EvalDevToolModulePlugin.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/

"use strict";

const { ConcatSource, RawSource } = require("webpack-sources");
const ExternalModule = require("./ExternalModule");
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 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;
                                        if (module instanceof ExternalModule) {
                                                cache.set(source, source);
                                                return source;
                                        }
                                        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.inlineInRuntimeBailout.tap(
                                "EvalDevToolModulePlugin",
                                () => "the eval devtool is used."
                        );
                        hooks.render.tap(
                                "EvalDevToolModulePlugin",
                                source => new ConcatSource(devtoolWarning, source)
                        );
                        hooks.chunkHash.tap("EvalDevToolModulePlugin", (chunk, hash) => {
                                hash.update("EvalDevToolModulePlugin");
                                hash.update("2");
                        });
                });
        }
}

module.exports = EvalDevToolModulePlugin;