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node_modules/webpack/lib/dependencies/URLPlugin.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Ivan Kopeykin @vankop
+*/
+
+"use strict";
+
+const { pathToFileURL } = require("url");
+const {
+	JAVASCRIPT_MODULE_TYPE_AUTO,
+	JAVASCRIPT_MODULE_TYPE_ESM
+} = require("../ModuleTypeConstants");
+const BasicEvaluatedExpression = require("../javascript/BasicEvaluatedExpression");
+const { approve } = require("../javascript/JavascriptParserHelpers");
+const InnerGraph = require("../optimize/InnerGraph");
+const URLDependency = require("./URLDependency");
+
+/** @typedef {import("estree").NewExpression} NewExpressionNode */
+/** @typedef {import("../../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */
+/** @typedef {import("../Compiler")} Compiler */
+/** @typedef {import("../Dependency").DependencyLocation} DependencyLocation */
+/** @typedef {import("../NormalModule")} NormalModule */
+/** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
+/** @typedef {import("../javascript/JavascriptParser")} Parser */
+/** @typedef {import("../javascript/JavascriptParser").Range} Range */
+
+const PLUGIN_NAME = "URLPlugin";
+
+class URLPlugin {
+	/**
+	 * @param {Compiler} compiler compiler
+	 */
+	apply(compiler) {
+		compiler.hooks.compilation.tap(
+			PLUGIN_NAME,
+			(compilation, { normalModuleFactory }) => {
+				compilation.dependencyFactories.set(URLDependency, normalModuleFactory);
+				compilation.dependencyTemplates.set(
+					URLDependency,
+					new URLDependency.Template()
+				);
+
+				/**
+				 * @param {NormalModule} module module
+				 * @returns {URL} file url
+				 */
+				const getUrl = module => {
+					return pathToFileURL(module.resource);
+				};
+
+				/**
+				 * @param {Parser} parser parser parser
+				 * @param {JavascriptParserOptions} parserOptions parserOptions
+				 * @returns {void}
+				 */
+				const parserCallback = (parser, parserOptions) => {
+					if (parserOptions.url === false) return;
+					const relative = parserOptions.url === "relative";
+
+					/**
+					 * @param {NewExpressionNode} expr expression
+					 * @returns {undefined | string} request
+					 */
+					const getUrlRequest = expr => {
+						if (expr.arguments.length !== 2) return;
+
+						const [arg1, arg2] = expr.arguments;
+
+						if (
+							arg2.type !== "MemberExpression" ||
+							arg1.type === "SpreadElement"
+						)
+							return;
+
+						const chain = parser.extractMemberExpressionChain(arg2);
+
+						if (
+							chain.members.length !== 1 ||
+							chain.object.type !== "MetaProperty" ||
+							chain.object.meta.name !== "import" ||
+							chain.object.property.name !== "meta" ||
+							chain.members[0] !== "url"
+						)
+							return;
+
+						return parser.evaluateExpression(arg1).asString();
+					};
+
+					parser.hooks.canRename.for("URL").tap(PLUGIN_NAME, approve);
+					parser.hooks.evaluateNewExpression
+						.for("URL")
+						.tap(PLUGIN_NAME, expr => {
+							const request = getUrlRequest(expr);
+							if (!request) return;
+							const url = new URL(request, getUrl(parser.state.module));
+
+							return new BasicEvaluatedExpression()
+								.setString(url.toString())
+								.setRange(/** @type {Range} */ (expr.range));
+						});
+					parser.hooks.new.for("URL").tap(PLUGIN_NAME, _expr => {
+						const expr = /** @type {NewExpressionNode} */ (_expr);
+
+						const request = getUrlRequest(expr);
+
+						if (!request) return;
+
+						const [arg1, arg2] = expr.arguments;
+						const dep = new URLDependency(
+							request,
+							[
+								/** @type {Range} */ (arg1.range)[0],
+								/** @type {Range} */ (arg2.range)[1]
+							],
+							/** @type {Range} */ (expr.range),
+							relative
+						);
+						dep.loc = /** @type {DependencyLocation} */ (expr.loc);
+						parser.state.current.addDependency(dep);
+						InnerGraph.onUsage(parser.state, e => (dep.usedByExports = e));
+						return true;
+					});
+					parser.hooks.isPure.for("NewExpression").tap(PLUGIN_NAME, _expr => {
+						const expr = /** @type {NewExpressionNode} */ (_expr);
+						const { callee } = expr;
+						if (callee.type !== "Identifier") return;
+						const calleeInfo = parser.getFreeInfoFromVariable(callee.name);
+						if (!calleeInfo || calleeInfo.name !== "URL") return;
+
+						const request = getUrlRequest(expr);
+
+						if (request) return true;
+					});
+				};
+
+				normalModuleFactory.hooks.parser
+					.for(JAVASCRIPT_MODULE_TYPE_AUTO)
+					.tap(PLUGIN_NAME, parserCallback);
+
+				normalModuleFactory.hooks.parser
+					.for(JAVASCRIPT_MODULE_TYPE_ESM)
+					.tap(PLUGIN_NAME, parserCallback);
+			}
+		);
+	}
+}
+
+module.exports = URLPlugin;