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https://github.com/angular/angular
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8d7f1098d8
As outlined in the previous commit which enabled the `esModuleInterop` TypeScript compiler option, we need to update all namespace imports for `typescript` to default imports. This is needed to allow for TypeScript to be imported at runtime from an ES module. Similar changes are needed for modules like `semver` where the types incorrectly suggest named exports that will not exist at runtime when imported from ESM. This commit refactors all imports to match with the lint rule we have configured in the previous commit. See the previous commit for more details on why certain imports have been changed. A special case are the imports to `@babel/core` and `@babel/types`. For these a special interop is needed as both default imports, or named imports break the other module format. e.g default imports would work well for ESM, but it breaks for CJS. For CJS, the named imports would only work, but in ESM, only the default export exist. We work around this for now until the devmode is using ESM as well (which would be consistent with prodmode and gives us more valuable test results). More details on the interop can be found in the `babel_core.ts` files (two interops are needed for both localize/or the compiler-cli). PR Close #43431
49 lines
1.8 KiB
TypeScript
49 lines
1.8 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC 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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* @fileoverview
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* This file is used as a private API channel to shared Angular FW APIs with @angular/cli.
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*
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* Any changes to this file should be discussed with the Angular CLI team.
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*/
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import ts from 'typescript';
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import {TypeScriptReflectionHost} from './ngtsc/reflection';
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import {getDownlevelDecoratorsTransform} from './transformers/downlevel_decorators_transform';
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/**
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* Known values for global variables in `@angular/core` that Terser should set using
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* https://github.com/terser-js/terser#conditional-compilation
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*/
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export const GLOBAL_DEFS_FOR_TERSER = {
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ngDevMode: false,
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ngI18nClosureMode: false,
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};
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export const GLOBAL_DEFS_FOR_TERSER_WITH_AOT = {
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...GLOBAL_DEFS_FOR_TERSER,
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ngJitMode: false,
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};
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/**
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* Transform for downleveling Angular decorators and Angular-decorated class constructor
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* parameters for dependency injection. This transform can be used by the CLI for JIT-mode
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* compilation where constructor parameters and associated Angular decorators should be
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* downleveled so that apps are not exposed to the ES2015 temporal dead zone limitation
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* in TypeScript. See https://github.com/angular/angular-cli/pull/14473 for more details.
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*/
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export function constructorParametersDownlevelTransform(program: ts.Program):
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ts.TransformerFactory<ts.SourceFile> {
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const typeChecker = program.getTypeChecker();
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const reflectionHost = new TypeScriptReflectionHost(typeChecker);
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return getDownlevelDecoratorsTransform(
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typeChecker, reflectionHost, [], /* isCore */ false,
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/* enableClosureCompiler */ false, /* skipClassDecorators */ true);
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}
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