refactor(core): Setup constant for standalone default value (#58175)

This commit is part of the migration to standalone by default and sets up 2 files with a default value for standalone. They are still `false` in this case to land the change into G3 first. The switch to `true` will be executed in a follow-up PR.

PR Close #58175

packages/compiler-cli/src/ngtsc/annotations/common/src/standalone-default-value.ts

@@ -0,0 +1,13 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+/**
+ * A constant defining the default value for the standalone attribute in Directive and Pipes decorators.
+ * Extracted to a separate file to facilitate G3 patches.
+ */
+export const NG_STANDALONE_DEFAULT_VALUE = false;

packages/compiler-cli/src/ngtsc/annotations/directive/src/shared.ts

@@ -84,6 +84,7 @@ import {tryParseSignalInputMapping} from './input_function';
 import {tryParseSignalModelMapping} from './model_function';
 import {tryParseInitializerBasedOutput} from './output_function';
 import {tryParseSignalQueryFromInitializer} from './query_functions';
+import {NG_STANDALONE_DEFAULT_VALUE} from '../../common/src/standalone-default-value';
 
 const EMPTY_OBJECT: {[key: string]: string} = {};
 
@@ -335,7 +336,7 @@ export function extractDirectiveMetadata(
         dep.token.value.name === 'TemplateRef',
     );
 
-  let isStandalone = false;
+  let isStandalone = NG_STANDALONE_DEFAULT_VALUE;
   if (directive.has('standalone')) {
     const expr = directive.get('standalone')!;
     const resolved = evaluator.evaluate(expr);

packages/compiler-cli/src/ngtsc/annotations/src/pipe.ts

@@ -49,6 +49,7 @@ import {
   unwrapExpression,
   wrapTypeReference,
 } from '../common';
+import {NG_STANDALONE_DEFAULT_VALUE} from '../common/src/standalone-default-value';
 
 export interface PipeHandlerData {
   meta: R3PipeMetadata;
@@ -176,7 +177,7 @@ export class PipeDecoratorHandler
       pure = pureValue;
     }
 
-    let isStandalone = false;
+    let isStandalone = NG_STANDALONE_DEFAULT_VALUE;
     if (pipe.has('standalone')) {
       const expr = pipe.get('standalone')!;
       const resolved = this.evaluator.evaluate(expr);

packages/core/src/core_render3_private_export.ts

@@ -310,3 +310,4 @@ export {
 } from './render3/deps_tracker/deps_tracker';
 export {generateStandaloneInDeclarationsError as ɵgenerateStandaloneInDeclarationsError} from './render3/jit/module';
 export {getAsyncClassMetadataFn as ɵgetAsyncClassMetadataFn} from './render3/metadata';
+export {NG_STANDALONE_DEFAULT_VALUE as ɵNG_STANDALONE_DEFAULT_VALUE} from './render3/standalone-default-value';

packages/core/src/render3/jit/directive.ts

@@ -41,6 +41,7 @@ import {
   patchComponentDefWithScope,
   transitiveScopesFor,
 } from './module';
+import {NG_STANDALONE_DEFAULT_VALUE} from '../standalone-default-value';
 import {isComponent, verifyStandaloneImport} from './util';
 
 /**
@@ -452,7 +453,8 @@ export function directiveMetadata(type: Type<any>, metadata: Directive): R3Direc
     exportAs: extractExportAs(metadata.exportAs),
     providers: metadata.providers || null,
     viewQueries: extractQueriesMetadata(type, propMetadata, isViewQuery),
-    isStandalone: !!metadata.standalone,
+    isStandalone:
+      metadata.standalone === undefined ? NG_STANDALONE_DEFAULT_VALUE : !!metadata.standalone,
     isSignal: !!metadata.signals,
     hostDirectives:
       metadata.hostDirectives?.map((directive) =>

packages/core/src/render3/jit/pipe.ts

@@ -17,6 +17,7 @@ import {Pipe} from '../../metadata/directives';
 import {NG_FACTORY_DEF, NG_PIPE_DEF} from '../fields';
 
 import {angularCoreEnv} from './environment';
+import {NG_STANDALONE_DEFAULT_VALUE} from '../standalone-default-value';
 
 export function compilePipe(type: Type<any>, meta: Pipe): void {
   let ngPipeDef: any = null;
@@ -73,6 +74,6 @@ function getPipeMetadata(type: Type<any>, meta: Pipe): R3PipeMetadataFacade {
     name: type.name,
     pipeName: meta.name,
     pure: meta.pure !== undefined ? meta.pure : true,
-    isStandalone: !!meta.standalone,
+    isStandalone: meta.standalone === undefined ? NG_STANDALONE_DEFAULT_VALUE : !!meta.standalone,
   };
 }

packages/core/src/render3/standalone-default-value.ts

@@ -0,0 +1,13 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+/**
+ * A constant defining the default value for the standalone attribute in Directive and Pipes decorators.
+ * Extracted to a separate file to facilitate G3 patches.
+ */
+export const NG_STANDALONE_DEFAULT_VALUE = false;

packages/core/test/bundling/defer/bundle.golden_symbols.json

@@ -2003,6 +2003,9 @@
   {
     "name": "init_skip_hydration"
   },
+  {
+    "name": "init_standalone_default_value"
+  },
   {
     "name": "init_standalone_feature"
   },

packages/core/testing/src/test_bed_compiler.ts

@@ -65,6 +65,7 @@ import {
   ɵɵInjectableDeclaration as InjectableDeclaration,
   NgZone,
   ErrorHandler,
+  ɵNG_STANDALONE_DEFAULT_VALUE as NG_STANDALONE_DEFAULT_VALUE,
 } from '@angular/core';
 
 import {ComponentDef, ComponentType} from '../../src/render3';
@@ -102,7 +103,7 @@ function assertNoStandaloneComponents(
   types.forEach((type) => {
     if (!getAsyncClassMetadataFn(type)) {
       const component = resolver.resolve(type);
-      if (component && component.standalone) {
+      if (component && (component.standalone ?? NG_STANDALONE_DEFAULT_VALUE)) {
         throw new Error(ɵgenerateStandaloneInDeclarationsError(type, location));
       }
     }