webpack/lib/dependencies/commonjs/RequireIncludeDependencyParserPlugin.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 RequireIncludeDeprecationWarning = require("../../errors/RequireIncludeDeprecationWarning");
const {
	evaluateToString,
	toConstantDependency
} = require("../../javascript/JavascriptParserHelpers");
const RequireIncludeDependency = require("./RequireIncludeDependency");

/** @import JavascriptParser, { Range } from "../../javascript/JavascriptParser" */

const PLUGIN_NAME = "RequireIncludeDependencyParserPlugin";

module.exports = class RequireIncludeDependencyParserPlugin {
	/**
	 * Creates an instance of RequireIncludeDependencyParserPlugin.
	 * @param {boolean} warn true: warn about deprecation, false: don't warn
	 */
	constructor(warn) {
		/** @type {boolean} */
		this.warn = warn;
	}

	/**
	 * Applies the plugin by registering its hooks on the compiler.
	 * @param {JavascriptParser} parser the parser
	 * @returns {void}
	 */
	apply(parser) {
		const { warn } = this;
		parser.hooks.call.for("require.include").tap(PLUGIN_NAME, (expr) => {
			if (expr.arguments.length !== 1) return;
			const param = parser.evaluateExpression(expr.arguments[0]);
			if (!param.isString()) return;

			if (warn) {
				parser.state.module.addWarning(
					new RequireIncludeDeprecationWarning(parser.getLocation(expr))
				);
			}

			const dep = new RequireIncludeDependency(
				/** @type {string} */ (param.string),
				/** @type {Range} */ (expr.range)
			);
			dep.loc = parser.getLocation(expr);
			parser.state.current.addDependency(dep);
			return true;
		});
		parser.hooks.evaluateTypeof
			.for("require.include")
			.tap(PLUGIN_NAME, (expr) => {
				if (warn) {
					parser.state.module.addWarning(
						new RequireIncludeDeprecationWarning(parser.getLocation(expr))
					);
				}
				return evaluateToString("function")(expr);
			});
		parser.hooks.typeof.for("require.include").tap(PLUGIN_NAME, (expr) => {
			if (warn) {
				parser.state.module.addWarning(
					new RequireIncludeDeprecationWarning(parser.getLocation(expr))
				);
			}
			return toConstantDependency(parser, JSON.stringify("function"))(expr);
		});
	}
};