253345c0c0
Reworked some of the code so asserts are no longer necessary. Added additional and potentially redundant checks Added checks where the null checker found real problems. PR Close #16422
52 lines
1.9 KiB
TypeScript
52 lines
1.9 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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import {AngularCompilerOptions, AotCompilerHost, CompilerHost, ModuleResolutionHostAdapter} from '@angular/compiler-cli';
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import * as ts from 'typescript';
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class ReflectorModuleModuleResolutionHost implements ts.ModuleResolutionHost {
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constructor(private host: ts.LanguageServiceHost) {
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if (host.directoryExists)
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this.directoryExists = directoryName => this.host.directoryExists !(directoryName);
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}
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fileExists(fileName: string): boolean { return !!this.host.getScriptSnapshot(fileName); }
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readFile(fileName: string): string {
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let snapshot = this.host.getScriptSnapshot(fileName);
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if (snapshot) {
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return snapshot.getText(0, snapshot.getLength());
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}
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// Typescript readFile() declaration should be `readFile(fileName: string): string | undefined
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return undefined !;
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}
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directoryExists: (directoryName: string) => boolean;
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}
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// This reflector host's purpose is to first set verboseInvalidExpressions to true so the
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// reflector will collect errors instead of throwing, and second to all deferring the creation
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// of the program until it is actually needed.
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export class ReflectorHost extends CompilerHost {
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constructor(
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private getProgram: () => ts.Program, serviceHost: ts.LanguageServiceHost,
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options: AngularCompilerOptions) {
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super(
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// The ancestor value for program is overridden below so passing null here is safe.
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/* program */ null !, options,
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new ModuleResolutionHostAdapter(new ReflectorModuleModuleResolutionHost(serviceHost)),
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{verboseInvalidExpression: true});
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}
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protected get program() { return this.getProgram(); }
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protected set program(value: ts.Program) {
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// Discard the result set by ancestor constructor
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}
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}
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