webpack/lib/dependencies/WebpackIsIncludedDependency.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 Ivan Kopeykin @vankop
*/

"use strict";

const Dependency = require("../Dependency");
const Template = require("../Template");
const makeSerializable = require("../util/makeSerializable");
const ModuleDependency = require("./ModuleDependency");

/** @typedef {import("webpack-sources").ReplaceSource} ReplaceSource */
/** @typedef {import("../Compilation")} Compilation */
/** @typedef {import("../Dependency").ReferencedExport} ReferencedExport */
/** @typedef {import("../DependencyTemplate").DependencyTemplateContext} DependencyTemplateContext */
/** @typedef {import("../ModuleGraph")} ModuleGraph */
/** @typedef {import("../util/runtime").RuntimeSpec} RuntimeSpec */

class WebpackIsIncludedDependency extends ModuleDependency {
	constructor(request, range) {
		super(request);

		this.weak = true;
		this.range = range;
	}

	/**
	 * Returns list of exports referenced by this dependency
	 * @param {ModuleGraph} moduleGraph module graph
	 * @param {RuntimeSpec} runtime the runtime for which the module is analysed
	 * @returns {(string[] | ReferencedExport)[]} referenced exports
	 */
	getReferencedExports(moduleGraph, runtime) {
		// This doesn't use any export
		return Dependency.NO_EXPORTS_REFERENCED;
	}

	get type() {
		return "__webpack_is_included__";
	}
}

makeSerializable(
	WebpackIsIncludedDependency,
	"webpack/lib/dependencies/WebpackIsIncludedDependency"
);

WebpackIsIncludedDependency.Template = class WebpackIsIncludedDependencyTemplate extends (
	ModuleDependency.Template
) {
	/**
	 * @param {Dependency} dependency the dependency for which the template should be applied
	 * @param {ReplaceSource} source the current replace source which can be modified
	 * @param {DependencyTemplateContext} templateContext the context object
	 * @returns {void}
	 */
	apply(dependency, source, { runtimeTemplate, chunkGraph, moduleGraph }) {
		const dep = /** @type {WebpackIsIncludedDependency} */ (dependency);
		const connection = moduleGraph.getConnection(dep);
		const included = connection
			? chunkGraph.getNumberOfModuleChunks(connection.module) > 0
			: false;
		const comment = runtimeTemplate.outputOptions.pathinfo
			? Template.toComment(
					`__webpack_is_included__ ${runtimeTemplate.requestShortener.shorten(
						dep.request
					)}`
			  )
			: "";

		source.replace(
			dep.range[0],
			dep.range[1] - 1,
			`${comment}${JSON.stringify(included)}`
		);
	}
};

module.exports = WebpackIsIncludedDependency;