Prioritize manual chunk name over dynamic entry id

src/Chunk.ts

@@ -187,6 +187,7 @@ export default class Chunk {
 	private dependencies = new Set<ExternalModule | Chunk>();
 	private dynamicDependencies = new Set<ExternalModule | Chunk>();
 	private dynamicEntryModules: Module[] = [];
+	private dynamicName: string | null = null;
 	private exportNamesByVariable = new Map<Variable, string[]>();
 	private exports = new Set<Variable>();
 	private exportsByName: Record<string, Variable> = Object.create(null);
@@ -384,7 +385,7 @@ export default class Chunk {
 				this.facadeModule = module;
 				this.facadeChunkByModule.set(module, this);
 				this.strictFacade = true;
-				this.assignFacadeName({}, module);
+				this.dynamicName = getChunkNameFromModule(module);
 			} else if (
 				this.facadeModule === module &&
 				!this.strictFacade &&
@@ -815,9 +816,7 @@ export default class Chunk {
 		if (fileName) {
 			this.fileName = fileName;
 		} else {
-			this.name = sanitizeFileName(
-				name || facadedModule.chunkName || getAliasName(facadedModule.id)
-			);
+			this.name = sanitizeFileName(name || getChunkNameFromModule(facadedModule));
 		}
 	}
 
@@ -1080,6 +1079,9 @@ export default class Chunk {
 		if (this.manualChunkAlias) {
 			return this.manualChunkAlias;
 		}
+		if (this.dynamicName) {
+			return this.dynamicName;
+		}
 		if (this.fileName) {
 			return getAliasName(this.fileName);
 		}
@@ -1370,3 +1372,7 @@ export default class Chunk {
 		}
 	}
 }
+
+function getChunkNameFromModule(module: Module): string {
+	return module.chunkName || getAliasName(module.id);
+}

test/chunking-form/samples/single-file-manual-chunk/_config.js

@@ -0,0 +1,12 @@
+module.exports = {
+	description: 'chunk aliasing with extensions',
+	options: {
+		output: {
+			manualChunks(id) {
+				if (id.endsWith('main.js')) return;
+				if (id.endsWith('a.js')) return 'first';
+				return 'second';
+			}
+		}
+	}
+};

test/chunking-form/samples/single-file-manual-chunk/_expected/amd/generated-first.js

@@ -0,0 +1,5 @@
+define(function () { 'use strict';
+
+	console.log('a');
+
+});

test/chunking-form/samples/single-file-manual-chunk/_expected/amd/generated-second.js

@@ -0,0 +1,18 @@
+define(['exports'], function (exports) { 'use strict';
+
+	console.log('b');
+
+	var b = /*#__PURE__*/Object.freeze({
+		__proto__: null
+	});
+
+	console.log('c');
+
+	var c = /*#__PURE__*/Object.freeze({
+		__proto__: null
+	});
+
+	exports.b = b;
+	exports.c = c;
+
+});

test/chunking-form/samples/single-file-manual-chunk/_expected/amd/main.js

@@ -0,0 +1,7 @@
+define(['require'], function (require) { 'use strict';
+
+	new Promise(function (resolve, reject) { require(['./generated-first'], resolve, reject) });
+	new Promise(function (resolve, reject) { require(['./generated-second'], resolve, reject) }).then(function (n) { return n.b; });
+	new Promise(function (resolve, reject) { require(['./generated-second'], resolve, reject) }).then(function (n) { return n.c; });
+
+});

test/chunking-form/samples/single-file-manual-chunk/_expected/cjs/generated-first.js

@@ -0,0 +1,3 @@
+'use strict';
+
+console.log('a');

test/chunking-form/samples/single-file-manual-chunk/_expected/cjs/generated-second.js

@@ -0,0 +1,16 @@
+'use strict';
+
+console.log('b');
+
+var b = /*#__PURE__*/Object.freeze({
+	__proto__: null
+});
+
+console.log('c');
+
+var c = /*#__PURE__*/Object.freeze({
+	__proto__: null
+});
+
+exports.b = b;
+exports.c = c;

test/chunking-form/samples/single-file-manual-chunk/_expected/cjs/main.js

@@ -0,0 +1,5 @@
+'use strict';
+
+Promise.resolve().then(function () { return require('./generated-first.js'); });
+Promise.resolve().then(function () { return require('./generated-second.js'); }).then(function (n) { return n.b; });
+Promise.resolve().then(function () { return require('./generated-second.js'); }).then(function (n) { return n.c; });

test/chunking-form/samples/single-file-manual-chunk/_expected/es/generated-first.js

@@ -0,0 +1 @@
+console.log('a');

test/chunking-form/samples/single-file-manual-chunk/_expected/es/generated-second.js

@@ -0,0 +1,13 @@
+console.log('b');
+
+var b = /*#__PURE__*/Object.freeze({
+	__proto__: null
+});
+
+console.log('c');
+
+var c = /*#__PURE__*/Object.freeze({
+	__proto__: null
+});
+
+export { b, c };

test/chunking-form/samples/single-file-manual-chunk/_expected/es/main.js

@@ -0,0 +1,3 @@
+import('./generated-first.js');
+import('./generated-second.js').then(function (n) { return n.b; });
+import('./generated-second.js').then(function (n) { return n.c; });

test/chunking-form/samples/single-file-manual-chunk/_expected/system/generated-first.js

@@ -0,0 +1,10 @@
+System.register([], function () {
+	'use strict';
+	return {
+		execute: function () {
+
+			console.log('a');
+
+		}
+	};
+});

test/chunking-form/samples/single-file-manual-chunk/_expected/system/generated-second.js

@@ -0,0 +1,22 @@
+System.register([], function (exports) {
+	'use strict';
+	return {
+		execute: function () {
+
+			console.log('b');
+
+			var b = /*#__PURE__*/Object.freeze({
+				__proto__: null
+			});
+			exports('b', b);
+
+			console.log('c');
+
+			var c = /*#__PURE__*/Object.freeze({
+				__proto__: null
+			});
+			exports('c', c);
+
+		}
+	};
+});

test/chunking-form/samples/single-file-manual-chunk/_expected/system/main.js

@@ -0,0 +1,12 @@
+System.register([], function (exports, module) {
+	'use strict';
+	return {
+		execute: function () {
+
+			module.import('./generated-first.js');
+			module.import('./generated-second.js').then(function (n) { return n.b; });
+			module.import('./generated-second.js').then(function (n) { return n.c; });
+
+		}
+	};
+});

test/chunking-form/samples/single-file-manual-chunk/a.js

@@ -0,0 +1 @@
+console.log('a');

test/chunking-form/samples/single-file-manual-chunk/b.js

@@ -0,0 +1 @@
+console.log('b');

test/chunking-form/samples/single-file-manual-chunk/c.js

@@ -0,0 +1 @@
+console.log('c');

test/chunking-form/samples/single-file-manual-chunk/main.js

@@ -0,0 +1,3 @@
+import('./a.js');
+import('./b.js');
+import('./c.js');