83 lines
3.2 KiB
TypeScript
83 lines
3.2 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 {StaticSymbolResolverHost} from '@angular/compiler';
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import {CompilerOptions, MetadataCollector, MetadataReaderCache, MetadataReaderHost, createMetadataReaderCache, readMetadata} from '@angular/compiler-cli/src/language_services';
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import * as path from 'path';
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import * as ts from 'typescript';
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class ReflectorModuleModuleResolutionHost implements ts.ModuleResolutionHost, MetadataReaderHost {
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// Note: verboseInvalidExpressions is important so that
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// the collector will collect errors instead of throwing
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private metadataCollector = new MetadataCollector({verboseInvalidExpression: true});
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constructor(private host: ts.LanguageServiceHost, private getProgram: () => ts.Program) {
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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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// TODO(issue/24571): remove '!'.
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directoryExists !: (directoryName: string) => boolean;
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getSourceFileMetadata(fileName: string) {
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const sf = this.getProgram().getSourceFile(fileName);
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return sf ? this.metadataCollector.getMetadata(sf) : undefined;
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}
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cacheMetadata(fileName: string) {
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// Don't cache the metadata for .ts files as they might change in the editor!
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return fileName.endsWith('.d.ts');
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}
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}
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export class ReflectorHost implements StaticSymbolResolverHost {
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private moduleResolutionCache: ts.ModuleResolutionCache;
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private hostAdapter: ReflectorModuleModuleResolutionHost;
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private metadataReaderCache = createMetadataReaderCache();
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constructor(
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getProgram: () => ts.Program, serviceHost: ts.LanguageServiceHost,
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private options: CompilerOptions) {
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this.hostAdapter = new ReflectorModuleModuleResolutionHost(serviceHost, getProgram);
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this.moduleResolutionCache =
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ts.createModuleResolutionCache(serviceHost.getCurrentDirectory(), (s) => s);
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}
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getMetadataFor(modulePath: string): {[key: string]: any}[]|undefined {
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return readMetadata(modulePath, this.hostAdapter, this.metadataReaderCache);
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}
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moduleNameToFileName(moduleName: string, containingFile?: string): string|null {
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if (!containingFile) {
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if (moduleName.indexOf('.') === 0) {
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throw new Error('Resolution of relative paths requires a containing file.');
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}
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// Any containing file gives the same result for absolute imports
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containingFile = path.join(this.options.basePath !, 'index.ts').replace(/\\/g, '/');
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}
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const resolved =
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ts.resolveModuleName(moduleName, containingFile !, this.options, this.hostAdapter)
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.resolvedModule;
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return resolved ? resolved.resolvedFileName : null;
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}
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getOutputName(filePath: string) { return filePath; }
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}
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