fixup! fix(@angular/build): enforce library compilerOptions and skip unused .tsbuildinfo emit

Author: alan-agius4

packages/angular/build/src/tools/angular/compilation/angular-compilation_spec.ts

@@ -477,7 +477,9 @@ describe('AngularCompilation', () => {
       expect(compilerOptions['_useTypeScriptTranspilation']).toBe(true);
       expect(compilerOptions.supportTestBed).toBe(true);
       expect(compilerOptions.supportJitMode).toBe(true);
+      expect(compilerOptions.noEmit).toBe(false);
       expect(compilerOptions.noEmitOnError).toBe(false);
+      expect(compilerOptions.emitDeclarationOnly).toBe(false);
       expect(compilerOptions.composite).toBe(false);
     });
 
@@ -498,6 +500,7 @@ describe('AngularCompilation', () => {
       );
 
       expect(compilerOptions.target).toBe(ts.ScriptTarget.ES2022);
+      expect(compilerOptions.module).toBe(ts.ModuleKind.Preserve);
       expect(compilerOptions.useDefineForClassFields).toBeUndefined();
       expect(compilerOptions.noEmit).toBe(false);
       expect(compilerOptions.emitDeclarationOnly).toBe(false);

packages/angular/build/src/tools/angular/compilation/compiler-options.ts

@@ -41,15 +41,13 @@ export function transformCompilerOptions(
 
   if (isLibrary) {
     compilerOptions.target = typeScript.ScriptTarget.ES2022;
-    compilerOptions.module = typeScript.ModuleKind.ES2022;
+    compilerOptions.module = typeScript.ModuleKind.Preserve;
     compilerOptions.importHelpers = true;
     compilerOptions.declaration = true;
     compilerOptions.declarationMap = !!(
       overrides?.declarationMap ?? compilerOptions.declarationMap
     );
     compilerOptions.declarationDir = undefined;
-    compilerOptions.noEmit = false;
-    compilerOptions.emitDeclarationOnly = false;
   }
 
   if (
@@ -138,7 +136,9 @@ export function transformCompilerOptions(
     compilerOptions: {
       ...compilerOptions,
       basePath: overrides?.basePath ? toPosixPath(overrides.basePath) : compilerOptions.basePath,
+      noEmit: false,
       noEmitOnError: false,
+      emitDeclarationOnly: false,
       composite: false,
       inlineSources: !!overrides?.sourcemap,
       inlineSourceMap: !isLibrary && !!overrides?.sourcemap,