webpack/lib/DllEntryPlugin.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

/*
	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 */

class DllEntryPlugin {
	/**
	 * @param {string} context context
	 * @param {string[]} entries entry names
	 * @param {TODO} 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;