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app_vue/node_modules/webpack/lib/dependencies/ImportMetaPlugin.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 ModuleDependencyWarning = require("../ModuleDependencyWarning");
+const {
+	JAVASCRIPT_MODULE_TYPE_AUTO,
+	JAVASCRIPT_MODULE_TYPE_ESM
+} = require("../ModuleTypeConstants");
+const Template = require("../Template");
+const BasicEvaluatedExpression = require("../javascript/BasicEvaluatedExpression");
+const {
+	evaluateToIdentifier,
+	toConstantDependency,
+	evaluateToString,
+	evaluateToNumber
+} = require("../javascript/JavascriptParserHelpers");
+const memoize = require("../util/memoize");
+const propertyAccess = require("../util/propertyAccess");
+const ConstDependency = require("./ConstDependency");
+
+/** @typedef {import("estree").MemberExpression} MemberExpression */
+/** @typedef {import("../../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */
+/** @typedef {import("../Compiler")} Compiler */
+/** @typedef {import("../Dependency").DependencyLocation} DependencyLocation */
+/** @typedef {import("../NormalModule")} NormalModule */
+/** @typedef {import("../javascript/JavascriptParser")} Parser */
+/** @typedef {import("../javascript/JavascriptParser").Range} Range */
+
+const getCriticalDependencyWarning = memoize(() =>
+	require("./CriticalDependencyWarning")
+);
+
+const PLUGIN_NAME = "ImportMetaPlugin";
+
+class ImportMetaPlugin {
+	/**
+	 * @param {Compiler} compiler compiler
+	 */
+	apply(compiler) {
+		compiler.hooks.compilation.tap(
+			PLUGIN_NAME,
+			(compilation, { normalModuleFactory }) => {
+				/**
+				 * @param {NormalModule} module module
+				 * @returns {string} file url
+				 */
+				const getUrl = module => pathToFileURL(module.resource).toString();
+				/**
+				 * @param {Parser} parser parser parser
+				 * @param {JavascriptParserOptions} parserOptions parserOptions
+				 * @returns {void}
+				 */
+				const parserHandler = (parser, { importMeta }) => {
+					if (importMeta === false) {
+						const { importMetaName } = compilation.outputOptions;
+						if (importMetaName === "import.meta") return;
+
+						parser.hooks.expression
+							.for("import.meta")
+							.tap(PLUGIN_NAME, metaProperty => {
+								const dep = new ConstDependency(
+									/** @type {string} */ (importMetaName),
+									/** @type {Range} */ (metaProperty.range)
+								);
+								dep.loc = /** @type {DependencyLocation} */ (metaProperty.loc);
+								parser.state.module.addPresentationalDependency(dep);
+								return true;
+							});
+						return;
+					}
+
+					// import.meta direct
+					const webpackVersion = Number.parseInt(
+						require("../../package.json").version,
+						10
+					);
+					const importMetaUrl = () =>
+						JSON.stringify(getUrl(parser.state.module));
+					const importMetaWebpackVersion = () => JSON.stringify(webpackVersion);
+					/**
+					 * @param {string[]} members members
+					 * @returns {string} error message
+					 */
+					const importMetaUnknownProperty = members =>
+						`${Template.toNormalComment(
+							`unsupported import.meta.${members.join(".")}`
+						)} undefined${propertyAccess(members, 1)}`;
+					parser.hooks.typeof
+						.for("import.meta")
+						.tap(
+							PLUGIN_NAME,
+							toConstantDependency(parser, JSON.stringify("object"))
+						);
+					parser.hooks.expression
+						.for("import.meta")
+						.tap(PLUGIN_NAME, metaProperty => {
+							const referencedPropertiesInDestructuring =
+								parser.destructuringAssignmentPropertiesFor(metaProperty);
+							if (!referencedPropertiesInDestructuring) {
+								const CriticalDependencyWarning =
+									getCriticalDependencyWarning();
+								parser.state.module.addWarning(
+									new ModuleDependencyWarning(
+										parser.state.module,
+										new CriticalDependencyWarning(
+											"Accessing import.meta directly is unsupported (only property access or destructuring is supported)"
+										),
+										/** @type {DependencyLocation} */ (metaProperty.loc)
+									)
+								);
+								const dep = new ConstDependency(
+									`${
+										parser.isAsiPosition(
+											/** @type {Range} */ (metaProperty.range)[0]
+										)
+											? ";"
+											: ""
+									}({})`,
+									/** @type {Range} */ (metaProperty.range)
+								);
+								dep.loc = /** @type {DependencyLocation} */ (metaProperty.loc);
+								parser.state.module.addPresentationalDependency(dep);
+								return true;
+							}
+
+							let str = "";
+							for (const { id: prop } of referencedPropertiesInDestructuring) {
+								switch (prop) {
+									case "url":
+										str += `url: ${importMetaUrl()},`;
+										break;
+									case "webpack":
+										str += `webpack: ${importMetaWebpackVersion()},`;
+										break;
+									default:
+										str += `[${JSON.stringify(
+											prop
+										)}]: ${importMetaUnknownProperty([prop])},`;
+										break;
+								}
+							}
+							const dep = new ConstDependency(
+								`({${str}})`,
+								/** @type {Range} */ (metaProperty.range)
+							);
+							dep.loc = /** @type {DependencyLocation} */ (metaProperty.loc);
+							parser.state.module.addPresentationalDependency(dep);
+							return true;
+						});
+					parser.hooks.evaluateTypeof
+						.for("import.meta")
+						.tap(PLUGIN_NAME, evaluateToString("object"));
+					parser.hooks.evaluateIdentifier.for("import.meta").tap(
+						PLUGIN_NAME,
+						evaluateToIdentifier("import.meta", "import.meta", () => [], true)
+					);
+
+					// import.meta.url
+					parser.hooks.typeof
+						.for("import.meta.url")
+						.tap(
+							PLUGIN_NAME,
+							toConstantDependency(parser, JSON.stringify("string"))
+						);
+					parser.hooks.expression
+						.for("import.meta.url")
+						.tap(PLUGIN_NAME, expr => {
+							const dep = new ConstDependency(
+								importMetaUrl(),
+								/** @type {Range} */ (expr.range)
+							);
+							dep.loc = /** @type {DependencyLocation} */ (expr.loc);
+							parser.state.module.addPresentationalDependency(dep);
+							return true;
+						});
+					parser.hooks.evaluateTypeof
+						.for("import.meta.url")
+						.tap(PLUGIN_NAME, evaluateToString("string"));
+					parser.hooks.evaluateIdentifier
+						.for("import.meta.url")
+						.tap(PLUGIN_NAME, expr =>
+							new BasicEvaluatedExpression()
+								.setString(getUrl(parser.state.module))
+								.setRange(/** @type {Range} */ (expr.range))
+						);
+
+					// import.meta.webpack
+					parser.hooks.typeof
+						.for("import.meta.webpack")
+						.tap(
+							PLUGIN_NAME,
+							toConstantDependency(parser, JSON.stringify("number"))
+						);
+					parser.hooks.expression
+						.for("import.meta.webpack")
+						.tap(
+							PLUGIN_NAME,
+							toConstantDependency(parser, importMetaWebpackVersion())
+						);
+					parser.hooks.evaluateTypeof
+						.for("import.meta.webpack")
+						.tap(PLUGIN_NAME, evaluateToString("number"));
+					parser.hooks.evaluateIdentifier
+						.for("import.meta.webpack")
+						.tap(PLUGIN_NAME, evaluateToNumber(webpackVersion));
+
+					// Unknown properties
+					parser.hooks.unhandledExpressionMemberChain
+						.for("import.meta")
+						.tap(PLUGIN_NAME, (expr, members) => {
+							const dep = new ConstDependency(
+								importMetaUnknownProperty(members),
+								/** @type {Range} */ (expr.range)
+							);
+							dep.loc = /** @type {DependencyLocation} */ (expr.loc);
+							parser.state.module.addPresentationalDependency(dep);
+							return true;
+						});
+					parser.hooks.evaluate
+						.for("MemberExpression")
+						.tap(PLUGIN_NAME, expression => {
+							const expr = /** @type {MemberExpression} */ (expression);
+							if (
+								expr.object.type === "MetaProperty" &&
+								expr.object.meta.name === "import" &&
+								expr.object.property.name === "meta" &&
+								expr.property.type ===
+									(expr.computed ? "Literal" : "Identifier")
+							) {
+								return new BasicEvaluatedExpression()
+									.setUndefined()
+									.setRange(/** @type {Range} */ (expr.range));
+							}
+						});
+				};
+
+				normalModuleFactory.hooks.parser
+					.for(JAVASCRIPT_MODULE_TYPE_AUTO)
+					.tap(PLUGIN_NAME, parserHandler);
+				normalModuleFactory.hooks.parser
+					.for(JAVASCRIPT_MODULE_TYPE_ESM)
+					.tap(PLUGIN_NAME, parserHandler);
+			}
+		);
+	}
+}
+
+module.exports = ImportMetaPlugin;