webpack/lib/sharing/declaredShared.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 Alexander Akait @alexander-akait
*/

"use strict";

/** @import Compilation from "../Compilation" */

/**
 * @typedef {object} SharedDeclaration
 * @property {string} name the config key, as the config spells it
 * @property {string} shareKey the key the modules created for it carry
 * @property {boolean} prefix whether it shares everything under the key
 */

/** @type {WeakMap<Compilation, SharedDeclaration[]>} */
const DECLARED_SHARED = new WeakMap();

/**
 * What this build declared as shared, one entry per config key, since several
 * may name one share key. `performance.unusedConfig` matches modules on the
 * share key and reports the config key.
 * @param {Compilation} compilation the compilation
 * @returns {SharedDeclaration[] | undefined} the declarations, when any were made
 */
const getDeclaredShared = (compilation) => DECLARED_SHARED.get(compilation);

/**
 * Records declarations, appending when a build applies the plugin more than
 * once, as `ModuleFederationPlugin` and `SharePlugin` do.
 * @param {Compilation} compilation the compilation
 * @param {SharedDeclaration[]} declarations what this application declared
 * @returns {void}
 */
const addDeclaredShared = (compilation, declarations) => {
	const declared = DECLARED_SHARED.get(compilation);

	if (declared === undefined) {
		DECLARED_SHARED.set(compilation, [...declarations]);
	} else {
		for (const declaration of declarations) declared.push(declaration);
	}
};

module.exports.addDeclaredShared = addDeclaredShared;
module.exports.getDeclaredShared = getDeclaredShared;