source: frontend/node_modules/webpack/lib/EntryPlugin.js

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

"use strict";

const EntryDependency = require("./dependencies/EntryDependency");

/** @typedef {import("./Compiler")} Compiler */
/** @typedef {import("./Entrypoint").EntryOptions} EntryOptions */

const PLUGIN_NAME = "EntryPlugin";

class EntryPlugin {
        /**
         * An entry plugin which will handle creation of the EntryDependency
         * @param {string} context context path
         * @param {string} entry entry path
         * @param {EntryOptions | string=} options entry options (passing a string is deprecated)
         */
        constructor(context, entry, options) {
                this.context = context;
                this.entry = entry;
                this.options = options || "";
        }

        /**
         * Applies the plugin by registering its hooks on the compiler.
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                compiler.hooks.compilation.tap(
                        PLUGIN_NAME,
                        (compilation, { normalModuleFactory }) => {
                                compilation.dependencyFactories.set(
                                        EntryDependency,
                                        normalModuleFactory
                                );
                        }
                );

                const { entry, options, context } = this;
                const dep = EntryPlugin.createDependency(entry, options);

                compiler.hooks.make.tapAsync(PLUGIN_NAME, (compilation, callback) => {
                        compilation.addEntry(context, dep, options, (err) => {
                                callback(err);
                        });
                });
        }

        /**
         * Creates a dependency.
         * @param {string} entry entry request
         * @param {EntryOptions | string} options entry options (passing string is deprecated)
         * @returns {EntryDependency} the dependency
         */
        static createDependency(entry, options) {
                const dep = new EntryDependency(entry);
                // TODO webpack 6 remove string option
                dep.loc = {
                        name:
                                typeof options === "object"
                                        ? /** @type {string} */ (options.name)
                                        : options
                };
                return dep;
        }
}

module.exports = EntryPlugin;