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node_modules/webpack/lib/dependencies/HarmonyDetectionParserPlugin.js

@@ -5,17 +5,38 @@
 "use strict";
 
 const HarmonyCompatibilityDependency = require("./HarmonyCompatibilityDependency");
+const HarmonyInitDependency = require("./HarmonyInitDependency");
 
 module.exports = class HarmonyDetectionParserPlugin {
 	apply(parser) {
-		parser.plugin("program", (ast) => {
-			const isHarmony = ast.body.some(statement => {
-				return /^(Import|Export).*Declaration$/.test(statement.type);
-			});
-			if(isHarmony) {
+		parser.hooks.program.tap("HarmonyDetectionParserPlugin", ast => {
+			const isStrictHarmony = parser.state.module.type === "javascript/esm";
+			const isHarmony =
+				isStrictHarmony ||
+				ast.body.some(
+					statement =>
+						statement.type === "ImportDeclaration" ||
+						statement.type === "ExportDefaultDeclaration" ||
+						statement.type === "ExportNamedDeclaration" ||
+						statement.type === "ExportAllDeclaration"
+				);
+			if (isHarmony) {
 				const module = parser.state.module;
-				const dep = new HarmonyCompatibilityDependency(module);
-				dep.loc = {
+				const compatDep = new HarmonyCompatibilityDependency(module);
+				compatDep.loc = {
+					start: {
+						line: -1,
+						column: 0
+					},
+					end: {
+						line: -1,
+						column: 0
+					},
+					index: -3
+				};
+				module.addDependency(compatDep);
+				const initDep = new HarmonyInitDependency(module);
+				initDep.loc = {
 					start: {
 						line: -1,
 						column: 0
@@ -26,31 +47,50 @@ module.exports = class HarmonyDetectionParserPlugin {
 					},
 					index: -2
 				};
-				module.addDependency(dep);
-				module.meta.harmonyModule = true;
-				module.strict = true;
-				module.exportsArgument = "__webpack_exports__";
+				module.addDependency(initDep);
+				parser.state.harmonyParserScope = parser.state.harmonyParserScope || {};
+				parser.scope.isStrict = true;
+				module.buildMeta.exportsType = "namespace";
+				module.buildInfo.strict = true;
+				module.buildInfo.exportsArgument = "__webpack_exports__";
+				if (isStrictHarmony) {
+					module.buildMeta.strictHarmonyModule = true;
+					module.buildInfo.moduleArgument = "__webpack_module__";
+				}
 			}
 		});
-		const nonHarmonyIdentifiers = ["define", "exports"];
-		nonHarmonyIdentifiers.forEach(identifer => {
-			parser.plugin(`evaluate typeof ${identifer}`, nullInHarmony);
-			parser.plugin(`typeof ${identifer}`, skipInHarmony);
-			parser.plugin(`evaluate ${identifer}`, nullInHarmony);
-			parser.plugin(`expression ${identifer}`, skipInHarmony);
-			parser.plugin(`call ${identifer}`, skipInHarmony);
-		});
 
-		function skipInHarmony() {
-			const module = this.state.module;
-			if(module && module.meta && module.meta.harmonyModule)
+		const skipInHarmony = () => {
+			const module = parser.state.module;
+			if (module && module.buildMeta && module.buildMeta.exportsType) {
 				return true;
-		}
+			}
+		};
 
-		function nullInHarmony() {
-			const module = this.state.module;
-			if(module && module.meta && module.meta.harmonyModule)
+		const nullInHarmony = () => {
+			const module = parser.state.module;
+			if (module && module.buildMeta && module.buildMeta.exportsType) {
 				return null;
+			}
+		};
+
+		const nonHarmonyIdentifiers = ["define", "exports"];
+		for (const identifer of nonHarmonyIdentifiers) {
+			parser.hooks.evaluateTypeof
+				.for(identifer)
+				.tap("HarmonyDetectionParserPlugin", nullInHarmony);
+			parser.hooks.typeof
+				.for(identifer)
+				.tap("HarmonyDetectionParserPlugin", skipInHarmony);
+			parser.hooks.evaluate
+				.for(identifer)
+				.tap("HarmonyDetectionParserPlugin", nullInHarmony);
+			parser.hooks.expression
+				.for(identifer)
+				.tap("HarmonyDetectionParserPlugin", skipInHarmony);
+			parser.hooks.call
+				.for(identifer)
+				.tap("HarmonyDetectionParserPlugin", skipInHarmony);
 		}
 	}
 };