feat: deduplicate reexports and renderedExports to simplify output

src/Chunk.ts

@@ -603,13 +603,17 @@ export default class Chunk {
 		const renderedExports = exportMode === 'none' ? [] : this.getChunkExportDeclarations(format);
 		let hasExports = renderedExports.length > 0;
 		let hasDefaultExport = false;
-		for (const { reexports } of renderedDependencies) {
+		for (const renderedDependence of renderedDependencies) {
+			const { reexports } = renderedDependence;
 			if (reexports?.length) {
 				hasExports = true;
-				if (reexports.some(reexport => reexport.reexported === 'default')) {
+				if (!hasDefaultExport && reexports.some(reexport => reexport.reexported === 'default')) {
 					hasDefaultExport = true;
-					break;
 				}
+				renderedDependence.reexports = reexports.filter(
+					// eslint-disable-next-line unicorn/prefer-array-some
+					({ reexported }) => !renderedExports.find(({ exported }) => exported === reexported)
+				);
 			}
 		}
 		if (!hasDefaultExport) {
@@ -769,7 +773,31 @@ export default class Chunk {
 			const variable = this.exportsByName.get(exportName)!;
 			if (!(variable instanceof SyntheticNamedExportVariable)) {
 				const module = variable.module;
-				if (module && this.chunkByModule.get(module as Module) !== this) continue;
+				if (module) {
+					const chunk = this.chunkByModule.get(module as Module);
+					if (!chunk) {
+						continue;
+					}
+					if (chunk !== this) {
+						if (!this.renderedDependencies) {
+							continue;
+						}
+						const chunkDep = this.renderedDependencies.get(chunk);
+						if (!chunkDep) {
+							continue;
+						}
+						const { imports, reexports } = chunkDep;
+						const importedByreexported = reexports?.find(
+							({ reexported }) => reexported === exportName
+						);
+						const isImported = imports?.find(
+							({ imported }) => imported === importedByreexported?.imported
+						);
+						if (!isImported) {
+							continue;
+						}
+					}
+				}
 			}
 			let expression = null;
 			let hoisted = false;

src/finalisers/system.ts

@@ -151,7 +151,7 @@ function analyzeDependencies(
 				} else {
 					setter.push(`exports(${exportMapping});`);
 				}
-			} else {
+			} else if (reexportedNames.length === 1) {
 				const [key, value] = reexportedNames[0];
 				setter.push(`exports('${key}',${_}${value});`);
 			}

test/chunking-form/samples/deprecated/preserve-modules-auto-export-mode/_expected/es/main.js

@@ -1,8 +1,9 @@
 import foo from './default.js';
-export { default } from './default.js';
 import { value } from './named.js';
 
 console.log(foo, value);
 
 import('./default.js').then(result => console.log(result.default));
 import('./named.js').then(result => console.log(result.value));
+
+export { foo as default };

test/chunking-form/samples/deprecated/preserve-modules-auto-export-mode/_expected/system/main.js

@@ -4,7 +4,6 @@ System.register(['./default.js', './named.js'], (function (exports, module) {
 	return {
 		setters: [function (module) {
 			foo = module.default;
-			exports('default', module.default);
 		}, function (module) {
 			value = module.value;
 		}],

test/chunking-form/samples/deprecated/preserve-modules-commonjs/_expected/es/other.js

@@ -1,4 +1,5 @@
 import { __exports as other } from './_virtual/other.js';
-export { __exports as default } from './_virtual/other.js';
 
 other.value = 43;
+
+export { other as default };

test/chunking-form/samples/deprecated/preserve-modules-commonjs/_expected/system/other.js

@@ -4,7 +4,6 @@ System.register(['./_virtual/other.js'], (function (exports) {
 	return {
 		setters: [function (module) {
 			other = module.__exports;
-			exports('default', module.__exports);
 		}],
 		execute: (function () {
 

test/chunking-form/samples/deprecated/preserve-modules-named-export-mode/_expected/es/main.js

@@ -1,8 +1,9 @@
 import foo from './default.js';
-export { default } from './default.js';
 import { value } from './named.js';
 
 console.log(foo, value);
 
 import('./default.js').then(result => console.log(result.default));
 import('./named.js').then(result => console.log(result.value));
+
+export { foo as default };

test/chunking-form/samples/deprecated/preserve-modules-named-export-mode/_expected/system/main.js

@@ -4,7 +4,6 @@ System.register(['./default.js', './named.js'], (function (exports, module) {
 	return {
 		setters: [function (module) {
 			foo = module.default;
-			exports('default', module.default);
 		}, function (module) {
 			value = module.value;
 		}],

test/chunking-form/samples/deprecated/preserve-modules-non-entry-imports/_expected/es/main.js

@@ -1,2 +1,5 @@
 import foo from './dep2.js';
-export { default } from './dep2.js';
+
+
+
+export { foo as default };

test/chunking-form/samples/deprecated/preserve-modules-non-entry-imports/_expected/system/main.js

@@ -4,10 +4,11 @@ System.register(['./dep2.js'], (function (exports) {
 	return {
 		setters: [function (module) {
 			foo = module.default;
-			exports('default', module.default);
 		}],
 		execute: (function () {
 
+			exports('default', foo);
+
 
 
 		})

test/chunking-form/samples/improved-dynamic-chunks/dynamic-import-dynamic-multi-stage/_expected/es/generated-dynamic2.js

@@ -1,4 +1,5 @@
 import { value } from './main.js';
-export { value } from './main.js';
 
 console.log('dynamic2', value);
+
+export { value };

test/chunking-form/samples/improved-dynamic-chunks/dynamic-import-dynamic-multi-stage/_expected/system/generated-dynamic2.js

@@ -4,7 +4,6 @@ System.register(['./main.js'], (function (exports) {
 	return {
 		setters: [function (module) {
 			value = module.value;
-			exports('value', module.value);
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/dynamic-import-dynamic/_expected/es/generated-dynamic2.js

@@ -1,4 +1,5 @@
 import { value } from './generated-dynamic1.js';
-export { value } from './generated-dynamic1.js';
 
 console.log('dynamic2', value);
+
+export { value };

test/chunking-form/samples/improved-dynamic-chunks/dynamic-import-dynamic/_expected/system/generated-dynamic2.js

@@ -4,7 +4,6 @@ System.register(['./generated-dynamic1.js'], (function (exports) {
 	return {
 		setters: [function (module) {
 			value = module.value;
-			exports('value', module.value);
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-and-shared-dependencies/_expected/es/generated-dynamic.js

@@ -1,6 +1,6 @@
 import { v as value1 } from './generated-from-main-1-and-dynamic.js';
-export { v as value1 } from './generated-from-main-1-and-dynamic.js';
 import { v as value2 } from './generated-from-main-1-and-2.js';
-export { v as value2 } from './generated-from-main-1-and-2.js';
 
 console.log('dynamic1', value1, value2);
+
+export { value1, value2 };

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-and-shared-dependencies/_expected/es/main1.js

@@ -1,7 +1,7 @@
 import { v as value1 } from './generated-from-main-1-and-dynamic.js';
-export { v as value1 } from './generated-from-main-1-and-dynamic.js';
 import { v as value2, a as value3 } from './generated-from-main-1-and-2.js';
-export { v as value2, a as value3 } from './generated-from-main-1-and-2.js';
 
 console.log('main1', value1, value2, value3);
 import('./generated-dynamic.js');
+
+export { value1, value2, value3 };

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-and-shared-dependencies/_expected/es/main2.js

@@ -1,5 +1,6 @@
 import { v as value2, a as value3 } from './generated-from-main-1-and-2.js';
-export { v as value2, a as value3 } from './generated-from-main-1-and-2.js';
 
 console.log('main2', value2, value3);
 import('./generated-dynamic.js');
+
+export { value2, value3 };

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-and-shared-dependencies/_expected/system/generated-dynamic.js

@@ -4,10 +4,8 @@ System.register(['./generated-from-main-1-and-dynamic.js', './generated-from-mai
 	return {
 		setters: [function (module) {
 			value1 = module.v;
-			exports('value1', module.v);
 		}, function (module) {
 			value2 = module.v;
-			exports('value2', module.v);
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-and-shared-dependencies/_expected/system/main1.js

@@ -4,11 +4,9 @@ System.register(['./generated-from-main-1-and-dynamic.js', './generated-from-mai
 	return {
 		setters: [function (module) {
 			value1 = module.v;
-			exports('value1', module.v);
 		}, function (module) {
 			value2 = module.v;
 			value3 = module.a;
-			exports({ value2: module.v, value3: module.a });
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-and-shared-dependencies/_expected/system/main2.js

@@ -5,7 +5,6 @@ System.register(['./generated-from-main-1-and-2.js'], (function (exports, module
 		setters: [function (module) {
 			value2 = module.v;
 			value3 = module.a;
-			exports({ value2: module.v, value3: module.a });
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-dependencies/_expected/es/generated-dynamic.js

@@ -1,6 +1,6 @@
 import { v as value1 } from './generated-dep1.js';
-export { v as value1 } from './generated-dep1.js';
 import { v as value2 } from './generated-dep2.js';
-export { v as value2 } from './generated-dep2.js';
 
 console.log('dynamic1', value1, value2);
+
+export { value1, value2 };

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-dependencies/_expected/es/main1.js

@@ -1,9 +1,9 @@
 import { v as value1 } from './generated-dep1.js';
-export { v as value1 } from './generated-dep1.js';
 import { v as value2 } from './generated-dep2.js';
-export { v as value2 } from './generated-dep2.js';
 
 const something = 'something';
 
 console.log('main1', value1, value2, something);
 import('./generated-dynamic.js');
+
+export { value1, value2 };

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-dependencies/_expected/es/main2.js

@@ -1,5 +1,6 @@
 import { v as value2 } from './generated-dep2.js';
-export { v as value2 } from './generated-dep2.js';
 
 console.log('main2', value2);
 import('./generated-dynamic.js');
+
+export { value2 };

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-dependencies/_expected/system/generated-dynamic.js

@@ -4,10 +4,8 @@ System.register(['./generated-dep1.js', './generated-dep2.js'], (function (expor
 	return {
 		setters: [function (module) {
 			value1 = module.v;
-			exports('value1', module.v);
 		}, function (module) {
 			value2 = module.v;
-			exports('value2', module.v);
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-dependencies/_expected/system/main1.js

@@ -4,10 +4,8 @@ System.register(['./generated-dep1.js', './generated-dep2.js'], (function (expor
 	return {
 		setters: [function (module) {
 			value1 = module.v;
-			exports('value1', module.v);
 		}, function (module) {
 			value2 = module.v;
-			exports('value2', module.v);
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-different-dependencies/_expected/system/main2.js

@@ -4,7 +4,6 @@ System.register(['./generated-dep2.js'], (function (exports, module) {
 	return {
 		setters: [function (module) {
 			value2 = module.v;
-			exports('value2', module.v);
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-partly-already-loaded-dynamic/_expected/amd/main1.js

@@ -5,7 +5,7 @@ define(['require', 'exports', './generated-dep2'], (function (require, exports,
 	console.log('main1', value1, dep2.value2);
 	new Promise(function (resolve, reject) { require(['./generated-dynamic1'], resolve, reject); });
 
-	exports.value2 = dep2.value2;
 	exports.value1 = value1;
+	exports.value2 = dep2.value2;
 
 }));

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-partly-already-loaded-dynamic/_expected/cjs/main1.js

@@ -7,5 +7,5 @@ const value1 = 'shared1';
 console.log('main1', value1, dep2.value2);
 Promise.resolve().then(function () { return require('./generated-dynamic1.js'); });
 
-exports.value2 = dep2.value2;
 exports.value1 = value1;
+exports.value2 = dep2.value2;

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-partly-already-loaded-dynamic/_expected/es/generated-dynamic1.js

@@ -1,5 +1,6 @@
 import { value1 } from './main1.js';
-export { value1 } from './main1.js';
 import './generated-dep2.js';
 
 console.log('dynamic1', value1);
+
+export { value1 };

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-partly-already-loaded-dynamic/_expected/es/generated-dynamic2.js

@@ -1,4 +1,5 @@
 import { v as value2 } from './generated-dep2.js';
-export { v as value2 } from './generated-dep2.js';
 
 console.log('dynamic2', value2);
+
+export { value2 };

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-partly-already-loaded-dynamic/_expected/es/main1.js

@@ -1,9 +1,8 @@
 import { v as value2 } from './generated-dep2.js';
-export { v as value2 } from './generated-dep2.js';
 
 const value1 = 'shared1';
 
 console.log('main1', value1, value2);
 import('./generated-dynamic1.js');
 
-export { value1 };
+export { value1, value2 };

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-partly-already-loaded-dynamic/_expected/es/main2.js

@@ -1,5 +1,6 @@
 import { v as value2 } from './generated-dep2.js';
-export { v as value2 } from './generated-dep2.js';
 
 console.log('main2', value2);
 import('./generated-dynamic2.js');
+
+export { value2 };

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-partly-already-loaded-dynamic/_expected/system/generated-dynamic1.js

@@ -4,7 +4,6 @@ System.register(['./main1.js', './generated-dep2.js'], (function (exports) {
 	return {
 		setters: [function (module) {
 			value1 = module.value1;
-			exports('value1', module.value1);
 		}, null],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-partly-already-loaded-dynamic/_expected/system/generated-dynamic2.js

@@ -4,7 +4,6 @@ System.register(['./generated-dep2.js'], (function (exports) {
 	return {
 		setters: [function (module) {
 			value2 = module.v;
-			exports('value2', module.v);
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-partly-already-loaded-dynamic/_expected/system/main1.js

@@ -4,7 +4,6 @@ System.register(['./generated-dep2.js'], (function (exports, module) {
 	return {
 		setters: [function (module) {
 			value2 = module.v;
-			exports('value2', module.v);
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/multi-entry-partly-already-loaded-dynamic/_expected/system/main2.js

@@ -4,7 +4,6 @@ System.register(['./generated-dep2.js'], (function (exports, module) {
 	return {
 		setters: [function (module) {
 			value2 = module.v;
-			exports('value2', module.v);
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/single-dynamic-multiple-imports/_expected/es/generated-dynamic.js

@@ -1,4 +1,5 @@
 import { value } from './main.js';
-export { value } from './main.js';
 
 console.log('dynamic', value);
+
+export { value };

test/chunking-form/samples/improved-dynamic-chunks/single-dynamic-multiple-imports/_expected/system/generated-dynamic.js

@@ -4,7 +4,6 @@ System.register(['./main.js'], (function (exports) {
 	return {
 		setters: [function (module) {
 			value = module.value;
-			exports('value', module.value);
 		}],
 		execute: (function () {
 

test/chunking-form/samples/improved-dynamic-chunks/single-dynamic/_expected/es/generated-dynamic.js

@@ -1,4 +1,5 @@
 import { value } from './main.js';
-export { value } from './main.js';
 
 console.log('dynamic', value);
+
+export { value };

test/chunking-form/samples/improved-dynamic-chunks/single-dynamic/_expected/system/generated-dynamic.js

@@ -4,7 +4,6 @@ System.register(['./main.js'], (function (exports) {
 	return {
 		setters: [function (module) {
 			value = module.value;
-			exports('value', module.value);
 		}],
 		execute: (function () {