3cf1b62722
Currently the ImportManager class handles various rewriting actions of imports when compiling @angular/core. This is required as code compiled within @angular/core cannot import from '@angular/core'. To work around this, imports are rewritten to get core symbols from a particular file, r3_symbols.ts. In this refactoring, this rewriting logic is moved out of the ImportManager and put behind an interface, ImportRewriter. There are three implementers of the interface: * NoopImportRewriter, used for compiling all non-core packages. * R3SymbolsImportRewriter, used when ngtsc compiles @angular/core. * NgccFlatImportRewriter, used when ngcc compiles @angular/core (special logic is needed because ngcc has to rewrite imports in flat bundles differently than in non-flat bundles). This is a precursor to using this rewriting logic in other contexts besides the ImportManager. PR Close #27998
37 lines
1.5 KiB
TypeScript
37 lines
1.5 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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/*
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* This file exists to support compilation of @angular/core in Ivy mode.
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*
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* When the Angular compiler processes a compilation unit, it normally writes imports to
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* @angular/core. When compiling the core package itself this strategy isn't usable. Instead, the
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* compiler writes imports to this file.
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*
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* Only a subset of such imports are supported - core is not allowed to declare components or pipes.
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* A check in ngtsc's `R3SymbolsImportRewriter` validates this condition. The rewriter is only used
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* when compiling @angular/core and is responsible for translating an external name (prefixed with
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* ɵ) to the internal symbol name as exported below.
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*
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* The below symbols are used for @Injectable and @NgModule compilation.
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*/
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export {InjectableDef, InjectorDef, defineInjectable, defineInjector} from './di/defs';
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export {inject} from './di/injector_compatibility';
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export {NgModuleDef, NgModuleDefWithMeta} from './metadata/ng_module';
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export {defineNgModule} from './render3/definition';
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export {setClassMetadata} from './render3/metadata';
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export {NgModuleFactory} from './render3/ng_module_ref';
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/**
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* The existence of this constant (in this particular file) informs the Angular compiler that the
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* current program is actually @angular/core, which needs to be compiled specially.
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*/
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export const ITS_JUST_ANGULAR = true;
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