webpack/lib/EntryPlugin.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 EntryDependency = require("./dependencies/EntryDependency");

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

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 || "";
	}

	/**
	 * Apply the plugin
	 * @param {Compiler} compiler the compiler instance
	 * @returns {void}
	 */
	apply(compiler) {
		compiler.hooks.compilation.tap(
			"EntryPlugin",
			(compilation, { normalModuleFactory }) => {
				compilation.dependencyFactories.set(
					EntryDependency,
					normalModuleFactory
				);
			}
		);

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

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

	/**
	 * @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;