source: imaps-frontend/node_modules/webpack/lib/DllEntryPlugin.js

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

"use strict";

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

/** @typedef {import("./Compiler")} Compiler */
/** @typedef {string[]} Entries */
/** @typedef {{ name: string, filename: TODO }} Options */

class DllEntryPlugin {
        /**
         * @param {string} context context
         * @param {Entries} entries entry names
         * @param {Options} options options
         */
        constructor(context, entries, options) {
                this.context = context;
                this.entries = entries;
                this.options = options;
        }

        /**
         * Apply the plugin
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                compiler.hooks.compilation.tap(
                        "DllEntryPlugin",
                        (compilation, { normalModuleFactory }) => {
                                const dllModuleFactory = new DllModuleFactory();
                                compilation.dependencyFactories.set(
                                        DllEntryDependency,
                                        dllModuleFactory
                                );
                                compilation.dependencyFactories.set(
                                        EntryDependency,
                                        normalModuleFactory
                                );
                        }
                );
                compiler.hooks.make.tapAsync("DllEntryPlugin", (compilation, callback) => {
                        compilation.addEntry(
                                this.context,
                                new DllEntryDependency(
                                        this.entries.map((e, idx) => {
                                                const dep = new EntryDependency(e);
                                                dep.loc = {
                                                        name: this.options.name,
                                                        index: idx
                                                };
                                                return dep;
                                        }),
                                        this.options.name
                                ),
                                this.options,
                                error => {
                                        if (error) return callback(error);
                                        callback();
                                }
                        );
                });
        }
}

module.exports = DllEntryPlugin;