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node_modules/webpack/lib/JavascriptMetaInfoPlugin.js

@@ -0,0 +1,68 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Sergey Melyukov @smelukov
+*/
+
+"use strict";
+
+const InnerGraph = require("./optimize/InnerGraph");
+
+/** @typedef {import("./Compiler")} Compiler */
+/** @typedef {import("./javascript/JavascriptParser")} JavascriptParser */
+
+class JavascriptMetaInfoPlugin {
+	/**
+	 * Apply the plugin
+	 * @param {Compiler} compiler the compiler instance
+	 * @returns {void}
+	 */
+	apply(compiler) {
+		compiler.hooks.compilation.tap(
+			"JavascriptMetaInfoPlugin",
+			(compilation, { normalModuleFactory }) => {
+				/**
+				 * @param {JavascriptParser} parser the parser
+				 * @returns {void}
+				 */
+				const handler = parser => {
+					parser.hooks.call.for("eval").tap("JavascriptMetaInfoPlugin", () => {
+						parser.state.module.buildInfo.moduleConcatenationBailout = "eval()";
+						parser.state.module.buildInfo.usingEval = true;
+						const currentSymbol = InnerGraph.getTopLevelSymbol(parser.state);
+						if (currentSymbol) {
+							InnerGraph.addUsage(parser.state, null, currentSymbol);
+						} else {
+							InnerGraph.bailout(parser.state);
+						}
+					});
+					parser.hooks.finish.tap("JavascriptMetaInfoPlugin", () => {
+						let topLevelDeclarations =
+							parser.state.module.buildInfo.topLevelDeclarations;
+						if (topLevelDeclarations === undefined) {
+							topLevelDeclarations =
+								parser.state.module.buildInfo.topLevelDeclarations = new Set();
+						}
+						for (const name of parser.scope.definitions.asSet()) {
+							const freeInfo = parser.getFreeInfoFromVariable(name);
+							if (freeInfo === undefined) {
+								topLevelDeclarations.add(name);
+							}
+						}
+					});
+				};
+
+				normalModuleFactory.hooks.parser
+					.for("javascript/auto")
+					.tap("JavascriptMetaInfoPlugin", handler);
+				normalModuleFactory.hooks.parser
+					.for("javascript/dynamic")
+					.tap("JavascriptMetaInfoPlugin", handler);
+				normalModuleFactory.hooks.parser
+					.for("javascript/esm")
+					.tap("JavascriptMetaInfoPlugin", handler);
+			}
+		);
+	}
+}
+
+module.exports = JavascriptMetaInfoPlugin;