webpack/lib/DllPlugin.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support 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 DllEntryPlugin = require("./DllEntryPlugin");
const LibManifestPlugin = require("./LibManifestPlugin");
const FlagInitialModulesAsUsedPlugin = require("./FlagInitialModulesAsUsedPlugin");

const validateOptions = require("schema-utils");
const schema = require("../schemas/plugins/DllPlugin.json");

/** @typedef {import("../declarations/plugins/DllPlugin").DllPluginOptions} DllPluginOptions */

class DllPlugin {
	/**
	 * @param {DllPluginOptions} options options object
	 */
	constructor(options) {
		validateOptions(schema, options, "Dll Plugin");
		this.options = options;
	}

	apply(compiler) {
		compiler.hooks.entryOption.tap("DllPlugin", (context, entry) => {
			const itemToPlugin = (item, name) => {
				if (Array.isArray(item)) {
					return new DllEntryPlugin(context, item, name);
				}
				throw new Error("DllPlugin: supply an Array as entry");
			};
			if (typeof entry === "object" && !Array.isArray(entry)) {
				Object.keys(entry).forEach(name => {
					itemToPlugin(entry[name], name).apply(compiler);
				});
			} else {
				itemToPlugin(entry, "main").apply(compiler);
			}
			return true;
		});
		new LibManifestPlugin(this.options).apply(compiler);
		if (!this.options.entryOnly) {
			new FlagInitialModulesAsUsedPlugin("DllPlugin").apply(compiler);
		}
	}
}

module.exports = DllPlugin;