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

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

"use strict";

const { join, dirname } = require("./util/fs");

/** @typedef {import("./Compiler")} Compiler */
/** @typedef {function(TODO): void} ModuleReplacer */

class NormalModuleReplacementPlugin {
        /**
         * Create an instance of the plugin
         * @param {RegExp} resourceRegExp the resource matcher
         * @param {string|ModuleReplacer} newResource the resource replacement
         */
        constructor(resourceRegExp, newResource) {
                this.resourceRegExp = resourceRegExp;
                this.newResource = newResource;
        }

        /**
         * Apply the plugin
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                const resourceRegExp = this.resourceRegExp;
                const newResource = this.newResource;
                compiler.hooks.normalModuleFactory.tap(
                        "NormalModuleReplacementPlugin",
                        nmf => {
                                nmf.hooks.beforeResolve.tap("NormalModuleReplacementPlugin", result => {
                                        if (resourceRegExp.test(result.request)) {
                                                if (typeof newResource === "function") {
                                                        newResource(result);
                                                } else {
                                                        result.request = newResource;
                                                }
                                        }
                                });
                                nmf.hooks.afterResolve.tap("NormalModuleReplacementPlugin", result => {
                                        const createData = result.createData;
                                        if (resourceRegExp.test(createData.resource)) {
                                                if (typeof newResource === "function") {
                                                        newResource(result);
                                                } else {
                                                        const fs = compiler.inputFileSystem;
                                                        if (
                                                                newResource.startsWith("/") ||
                                                                (newResource.length > 1 && newResource[1] === ":")
                                                        ) {
                                                                createData.resource = newResource;
                                                        } else {
                                                                createData.resource = join(
                                                                        fs,
                                                                        dirname(fs, createData.resource),
                                                                        newResource
                                                                );
                                                        }
                                                }
                                        }
                                });
                        }
                );
        }
}

module.exports = NormalModuleReplacementPlugin;