mirror of
https://github.com/angular/angular
synced 2026-05-24 09:28:37 +00:00
c1392ce618
In certain configurations (such as the g3 repository) which have lots of
small compilation units as well as strict dependency checking on generated
code, ngtsc's default strategy of directly importing directives/pipes into
components will not work. To handle these cases, an additional mode is
introduced, and is enabled when using the FileToModuleHost provided by such
compilation environments.
In this mode, when ngtsc encounters an NgModule which re-exports another
from a different file, it will re-export all the directives it contains at
the ES2015 level. The exports will have a predictable name based on the
FileToModuleHost. For example, if the host says that a directive Foo is
from the 'root/external/foo' module, ngtsc will add:
```
export {Foo as ɵng$root$external$foo$$Foo} from 'root/external/foo';
```
Consumers of the re-exported directive will then import it via this path
instead of directly from root/external/foo, preserving strict dependency
semantics.
PR Close #28852
504 lines
21 KiB
TypeScript
504 lines
21 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 {GeneratedFile} from '@angular/compiler';
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import * as ts from 'typescript';
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import * as api from '../transformers/api';
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import {nocollapseHack} from '../transformers/nocollapse_hack';
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import {ComponentDecoratorHandler, DirectiveDecoratorHandler, InjectableDecoratorHandler, NgModuleDecoratorHandler, NoopReferencesRegistry, PipeDecoratorHandler, ReferencesRegistry} from './annotations';
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import {BaseDefDecoratorHandler} from './annotations/src/base_def';
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import {CycleAnalyzer, ImportGraph} from './cycles';
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import {ErrorCode, ngErrorCode} from './diagnostics';
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import {FlatIndexGenerator, ReferenceGraph, checkForPrivateExports, findFlatIndexEntryPoint} from './entry_point';
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import {AbsoluteModuleStrategy, AliasGenerator, AliasStrategy, FileToModuleHost, FileToModuleStrategy, ImportRewriter, LocalIdentifierStrategy, LogicalProjectStrategy, ModuleResolver, NoopImportRewriter, R3SymbolsImportRewriter, Reference, ReferenceEmitter} from './imports';
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import {PartialEvaluator} from './partial_evaluator';
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import {AbsoluteFsPath, LogicalFileSystem} from './path';
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import {TypeScriptReflectionHost} from './reflection';
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import {HostResourceLoader} from './resource_loader';
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import {NgModuleRouteAnalyzer, entryPointKeyFor} from './routing';
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import {LocalModuleScopeRegistry, MetadataDtsModuleScopeResolver} from './scope';
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import {FactoryGenerator, FactoryInfo, GeneratedShimsHostWrapper, ShimGenerator, SummaryGenerator, generatedFactoryTransform} from './shims';
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import {ivySwitchTransform} from './switch';
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import {IvyCompilation, declarationTransformFactory, ivyTransformFactory} from './transform';
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import {aliasTransformFactory} from './transform/src/alias';
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import {TypeCheckContext, TypeCheckProgramHost} from './typecheck';
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import {normalizeSeparators} from './util/src/path';
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import {getRootDirs, isDtsPath} from './util/src/typescript';
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export class NgtscProgram implements api.Program {
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private tsProgram: ts.Program;
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private resourceManager: HostResourceLoader;
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private compilation: IvyCompilation|undefined = undefined;
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private factoryToSourceInfo: Map<string, FactoryInfo>|null = null;
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private sourceToFactorySymbols: Map<string, Set<string>>|null = null;
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private host: ts.CompilerHost;
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private _coreImportsFrom: ts.SourceFile|null|undefined = undefined;
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private _importRewriter: ImportRewriter|undefined = undefined;
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private _reflector: TypeScriptReflectionHost|undefined = undefined;
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private _isCore: boolean|undefined = undefined;
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private rootDirs: AbsoluteFsPath[];
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private closureCompilerEnabled: boolean;
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private entryPoint: ts.SourceFile|null;
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private exportReferenceGraph: ReferenceGraph|null = null;
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private flatIndexGenerator: FlatIndexGenerator|null = null;
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private routeAnalyzer: NgModuleRouteAnalyzer|null = null;
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private constructionDiagnostics: ts.Diagnostic[] = [];
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private moduleResolver: ModuleResolver;
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private cycleAnalyzer: CycleAnalyzer;
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private refEmitter: ReferenceEmitter|null = null;
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private fileToModuleHost: FileToModuleHost|null = null;
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constructor(
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rootNames: ReadonlyArray<string>, private options: api.CompilerOptions,
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host: api.CompilerHost, oldProgram?: api.Program) {
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this.rootDirs = getRootDirs(host, options);
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this.closureCompilerEnabled = !!options.annotateForClosureCompiler;
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this.resourceManager = new HostResourceLoader(host, options);
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const shouldGenerateShims = options.allowEmptyCodegenFiles || false;
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this.host = host;
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if (host.fileNameToModuleName !== undefined) {
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this.fileToModuleHost = host as FileToModuleHost;
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}
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let rootFiles = [...rootNames];
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const generators: ShimGenerator[] = [];
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if (shouldGenerateShims) {
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// Summary generation.
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const summaryGenerator = SummaryGenerator.forRootFiles(rootNames);
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// Factory generation.
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const factoryGenerator = FactoryGenerator.forRootFiles(rootNames);
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const factoryFileMap = factoryGenerator.factoryFileMap;
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this.factoryToSourceInfo = new Map<string, FactoryInfo>();
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this.sourceToFactorySymbols = new Map<string, Set<string>>();
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factoryFileMap.forEach((sourceFilePath, factoryPath) => {
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const moduleSymbolNames = new Set<string>();
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this.sourceToFactorySymbols !.set(sourceFilePath, moduleSymbolNames);
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this.factoryToSourceInfo !.set(factoryPath, {sourceFilePath, moduleSymbolNames});
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});
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const factoryFileNames = Array.from(factoryFileMap.keys());
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rootFiles.push(...factoryFileNames, ...summaryGenerator.getSummaryFileNames());
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generators.push(summaryGenerator, factoryGenerator);
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}
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let entryPoint: string|null = null;
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if (options.flatModuleOutFile !== undefined) {
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entryPoint = findFlatIndexEntryPoint(rootNames);
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if (entryPoint === null) {
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// This error message talks specifically about having a single .ts file in "files". However
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// the actual logic is a bit more permissive. If a single file exists, that will be taken,
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// otherwise the highest level (shortest path) "index.ts" file will be used as the flat
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// module entry point instead. If neither of these conditions apply, the error below is
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// given.
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//
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// The user is not informed about the "index.ts" option as this behavior is deprecated -
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// an explicit entrypoint should always be specified.
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this.constructionDiagnostics.push({
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category: ts.DiagnosticCategory.Error,
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code: ngErrorCode(ErrorCode.CONFIG_FLAT_MODULE_NO_INDEX),
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file: undefined,
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start: undefined,
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length: undefined,
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messageText:
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'Angular compiler option "flatModuleOutFile" requires one and only one .ts file in the "files" field.',
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});
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} else {
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const flatModuleId = options.flatModuleId || null;
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const flatModuleOutFile = normalizeSeparators(options.flatModuleOutFile);
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this.flatIndexGenerator =
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new FlatIndexGenerator(entryPoint, flatModuleOutFile, flatModuleId);
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generators.push(this.flatIndexGenerator);
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rootFiles.push(this.flatIndexGenerator.flatIndexPath);
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}
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}
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if (generators.length > 0) {
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this.host = new GeneratedShimsHostWrapper(host, generators);
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}
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this.tsProgram =
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ts.createProgram(rootFiles, options, this.host, oldProgram && oldProgram.getTsProgram());
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this.entryPoint = entryPoint !== null ? this.tsProgram.getSourceFile(entryPoint) || null : null;
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this.moduleResolver = new ModuleResolver(this.tsProgram, options, this.host);
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this.cycleAnalyzer = new CycleAnalyzer(new ImportGraph(this.moduleResolver));
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}
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getTsProgram(): ts.Program { return this.tsProgram; }
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getTsOptionDiagnostics(cancellationToken?: ts.CancellationToken|
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undefined): ReadonlyArray<ts.Diagnostic> {
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return this.tsProgram.getOptionsDiagnostics(cancellationToken);
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}
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getNgOptionDiagnostics(cancellationToken?: ts.CancellationToken|
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undefined): ReadonlyArray<ts.Diagnostic|api.Diagnostic> {
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return this.constructionDiagnostics;
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}
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getTsSyntacticDiagnostics(
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sourceFile?: ts.SourceFile|undefined,
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cancellationToken?: ts.CancellationToken|undefined): ReadonlyArray<ts.Diagnostic> {
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return this.tsProgram.getSyntacticDiagnostics(sourceFile, cancellationToken);
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}
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getNgStructuralDiagnostics(cancellationToken?: ts.CancellationToken|
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undefined): ReadonlyArray<api.Diagnostic> {
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return [];
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}
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getTsSemanticDiagnostics(
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sourceFile?: ts.SourceFile|undefined,
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cancellationToken?: ts.CancellationToken|undefined): ReadonlyArray<ts.Diagnostic> {
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return this.tsProgram.getSemanticDiagnostics(sourceFile, cancellationToken);
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}
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getNgSemanticDiagnostics(
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fileName?: string|undefined, cancellationToken?: ts.CancellationToken|
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undefined): ReadonlyArray<ts.Diagnostic|api.Diagnostic> {
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const compilation = this.ensureAnalyzed();
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const diagnostics = [...compilation.diagnostics];
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if (!!this.options.fullTemplateTypeCheck) {
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const ctx = new TypeCheckContext(this.refEmitter !);
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compilation.typeCheck(ctx);
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diagnostics.push(...this.compileTypeCheckProgram(ctx));
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}
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if (this.entryPoint !== null && this.exportReferenceGraph !== null) {
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diagnostics.push(...checkForPrivateExports(
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this.entryPoint, this.tsProgram.getTypeChecker(), this.exportReferenceGraph));
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}
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return diagnostics;
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}
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async loadNgStructureAsync(): Promise<void> {
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if (this.compilation === undefined) {
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this.compilation = this.makeCompilation();
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}
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await Promise.all(this.tsProgram.getSourceFiles()
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.filter(file => !file.fileName.endsWith('.d.ts'))
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.map(file => this.compilation !.analyzeAsync(file))
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.filter((result): result is Promise<void> => result !== undefined));
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this.compilation.resolve();
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}
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listLazyRoutes(entryRoute?: string|undefined): api.LazyRoute[] {
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if (entryRoute) {
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// Note:
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// This resolution step is here to match the implementation of the old `AotCompilerHost` (see
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// https://github.com/angular/angular/blob/50732e156/packages/compiler-cli/src/transformers/compiler_host.ts#L175-L188).
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//
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// `@angular/cli` will always call this API with an absolute path, so the resolution step is
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// not necessary, but keeping it backwards compatible in case someone else is using the API.
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// Relative entry paths are disallowed.
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if (entryRoute.startsWith('.')) {
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throw new Error(
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`Failed to list lazy routes: Resolution of relative paths (${entryRoute}) is not supported.`);
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}
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// Non-relative entry paths fall into one of the following categories:
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// - Absolute system paths (e.g. `/foo/bar/my-project/my-module`), which are unaffected by the
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// logic below.
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// - Paths to enternal modules (e.g. `some-lib`).
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// - Paths mapped to directories in `tsconfig.json` (e.g. `shared/my-module`).
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// (See https://www.typescriptlang.org/docs/handbook/module-resolution.html#path-mapping.)
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//
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// In all cases above, the `containingFile` argument is ignored, so we can just take the first
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// of the root files.
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const containingFile = this.tsProgram.getRootFileNames()[0];
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const [entryPath, moduleName] = entryRoute.split('#');
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const resolved = ts.resolveModuleName(entryPath, containingFile, this.options, this.host);
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if (resolved.resolvedModule) {
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entryRoute = entryPointKeyFor(resolved.resolvedModule.resolvedFileName, moduleName);
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}
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}
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this.ensureAnalyzed();
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return this.routeAnalyzer !.listLazyRoutes(entryRoute);
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}
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getLibrarySummaries(): Map<string, api.LibrarySummary> {
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throw new Error('Method not implemented.');
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}
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getEmittedGeneratedFiles(): Map<string, GeneratedFile> {
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throw new Error('Method not implemented.');
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}
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getEmittedSourceFiles(): Map<string, ts.SourceFile> {
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throw new Error('Method not implemented.');
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}
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private ensureAnalyzed(): IvyCompilation {
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if (this.compilation === undefined) {
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this.compilation = this.makeCompilation();
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this.tsProgram.getSourceFiles()
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.filter(file => !file.fileName.endsWith('.d.ts'))
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.forEach(file => this.compilation !.analyzeSync(file));
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this.compilation.resolve();
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}
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return this.compilation;
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}
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emit(opts?: {
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emitFlags?: api.EmitFlags,
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cancellationToken?: ts.CancellationToken,
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customTransformers?: api.CustomTransformers,
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emitCallback?: api.TsEmitCallback,
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mergeEmitResultsCallback?: api.TsMergeEmitResultsCallback
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}): ts.EmitResult {
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const emitCallback = opts && opts.emitCallback || defaultEmitCallback;
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const compilation = this.ensureAnalyzed();
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const writeFile: ts.WriteFileCallback =
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(fileName: string, data: string, writeByteOrderMark: boolean,
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onError: ((message: string) => void) | undefined,
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sourceFiles: ReadonlyArray<ts.SourceFile>) => {
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if (this.closureCompilerEnabled && fileName.endsWith('.js')) {
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data = nocollapseHack(data);
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}
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this.host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles);
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};
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const customTransforms = opts && opts.customTransformers;
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const beforeTransforms = [
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ivyTransformFactory(
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compilation, this.reflector, this.importRewriter, this.isCore,
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this.closureCompilerEnabled),
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aliasTransformFactory(compilation.exportStatements) as ts.TransformerFactory<ts.SourceFile>,
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];
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const afterDeclarationsTransforms = [
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declarationTransformFactory(compilation),
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];
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if (this.factoryToSourceInfo !== null) {
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beforeTransforms.push(
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generatedFactoryTransform(this.factoryToSourceInfo, this.importRewriter));
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}
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beforeTransforms.push(ivySwitchTransform);
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if (customTransforms && customTransforms.beforeTs) {
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beforeTransforms.push(...customTransforms.beforeTs);
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}
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// Run the emit, including a custom transformer that will downlevel the Ivy decorators in code.
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const emitResult = emitCallback({
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program: this.tsProgram,
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host: this.host,
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options: this.options,
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emitOnlyDtsFiles: false, writeFile,
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customTransformers: {
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before: beforeTransforms,
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after: customTransforms && customTransforms.afterTs,
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afterDeclarations: afterDeclarationsTransforms,
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},
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});
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return emitResult;
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}
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private compileTypeCheckProgram(ctx: TypeCheckContext): ReadonlyArray<ts.Diagnostic> {
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const host = new TypeCheckProgramHost(this.tsProgram, this.host, ctx);
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const auxProgram = ts.createProgram({
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host,
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rootNames: this.tsProgram.getRootFileNames(),
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oldProgram: this.tsProgram,
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options: this.options,
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});
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return auxProgram.getSemanticDiagnostics();
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}
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private makeCompilation(): IvyCompilation {
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const checker = this.tsProgram.getTypeChecker();
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let aliasGenerator: AliasGenerator|null = null;
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// Construct the ReferenceEmitter.
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if (this.fileToModuleHost === null || !this.options._useHostForImportGeneration) {
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// The CompilerHost doesn't have fileNameToModuleName, so build an NPM-centric reference
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// resolution strategy.
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this.refEmitter = new ReferenceEmitter([
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// First, try to use local identifiers if available.
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new LocalIdentifierStrategy(),
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// Next, attempt to use an absolute import.
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new AbsoluteModuleStrategy(this.tsProgram, checker, this.options, this.host),
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// Finally, check if the reference is being written into a file within the project's logical
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// file system, and use a relative import if so. If this fails, ReferenceEmitter will throw
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// an error.
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new LogicalProjectStrategy(checker, new LogicalFileSystem(this.rootDirs)),
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]);
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} else {
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// The CompilerHost supports fileNameToModuleName, so use that to emit imports.
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this.refEmitter = new ReferenceEmitter([
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// First, try to use local identifiers if available.
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new LocalIdentifierStrategy(),
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// Then use aliased references (this is a workaround to StrictDeps checks).
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new AliasStrategy(),
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// Then use fileNameToModuleName to emit imports.
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new FileToModuleStrategy(checker, this.fileToModuleHost),
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]);
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aliasGenerator = new AliasGenerator(this.fileToModuleHost);
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}
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const evaluator = new PartialEvaluator(this.reflector, checker);
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const depScopeReader =
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new MetadataDtsModuleScopeResolver(checker, this.reflector, aliasGenerator);
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const scopeRegistry =
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new LocalModuleScopeRegistry(depScopeReader, this.refEmitter, aliasGenerator);
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// If a flat module entrypoint was specified, then track references via a `ReferenceGraph` in
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// order to produce proper diagnostics for incorrectly exported directives/pipes/etc. If there
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// is no flat module entrypoint then don't pay the cost of tracking references.
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let referencesRegistry: ReferencesRegistry;
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if (this.entryPoint !== null) {
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this.exportReferenceGraph = new ReferenceGraph();
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referencesRegistry = new ReferenceGraphAdapter(this.exportReferenceGraph);
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} else {
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referencesRegistry = new NoopReferencesRegistry();
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}
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this.routeAnalyzer = new NgModuleRouteAnalyzer(this.moduleResolver, evaluator);
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// Set up the IvyCompilation, which manages state for the Ivy transformer.
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const handlers = [
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new BaseDefDecoratorHandler(this.reflector, evaluator),
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new ComponentDecoratorHandler(
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this.reflector, evaluator, scopeRegistry, this.isCore, this.resourceManager,
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this.rootDirs, this.options.preserveWhitespaces || false,
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this.options.i18nUseExternalIds !== false, this.moduleResolver, this.cycleAnalyzer,
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this.refEmitter),
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new DirectiveDecoratorHandler(this.reflector, evaluator, scopeRegistry, this.isCore),
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new InjectableDecoratorHandler(
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this.reflector, this.isCore, this.options.strictInjectionParameters || false),
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new NgModuleDecoratorHandler(
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this.reflector, evaluator, scopeRegistry, referencesRegistry, this.isCore,
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this.routeAnalyzer, this.refEmitter),
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new PipeDecoratorHandler(this.reflector, evaluator, scopeRegistry, this.isCore),
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];
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return new IvyCompilation(
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handlers, checker, this.reflector, this.importRewriter, this.sourceToFactorySymbols);
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}
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private get reflector(): TypeScriptReflectionHost {
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if (this._reflector === undefined) {
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this._reflector = new TypeScriptReflectionHost(this.tsProgram.getTypeChecker());
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}
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return this._reflector;
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}
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private get coreImportsFrom(): ts.SourceFile|null {
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if (this._coreImportsFrom === undefined) {
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this._coreImportsFrom = this.isCore && getR3SymbolsFile(this.tsProgram) || null;
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}
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return this._coreImportsFrom;
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}
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private get isCore(): boolean {
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if (this._isCore === undefined) {
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this._isCore = isAngularCorePackage(this.tsProgram);
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}
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return this._isCore;
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}
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|
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private get importRewriter(): ImportRewriter {
|
|
if (this._importRewriter === undefined) {
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|
const coreImportsFrom = this.coreImportsFrom;
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|
this._importRewriter = coreImportsFrom !== null ?
|
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new R3SymbolsImportRewriter(coreImportsFrom.fileName) :
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new NoopImportRewriter();
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}
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return this._importRewriter;
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}
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}
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const defaultEmitCallback: api.TsEmitCallback =
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|
({program, targetSourceFile, writeFile, cancellationToken, emitOnlyDtsFiles,
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customTransformers}) =>
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program.emit(
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targetSourceFile, writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers);
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function mergeEmitResults(emitResults: ts.EmitResult[]): ts.EmitResult {
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const diagnostics: ts.Diagnostic[] = [];
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let emitSkipped = false;
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const emittedFiles: string[] = [];
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for (const er of emitResults) {
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diagnostics.push(...er.diagnostics);
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emitSkipped = emitSkipped || er.emitSkipped;
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emittedFiles.push(...(er.emittedFiles || []));
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}
|
|
return {diagnostics, emitSkipped, emittedFiles};
|
|
}
|
|
|
|
/**
|
|
* Find the 'r3_symbols.ts' file in the given `Program`, or return `null` if it wasn't there.
|
|
*/
|
|
function getR3SymbolsFile(program: ts.Program): ts.SourceFile|null {
|
|
return program.getSourceFiles().find(file => file.fileName.indexOf('r3_symbols.ts') >= 0) || null;
|
|
}
|
|
|
|
/**
|
|
* Determine if the given `Program` is @angular/core.
|
|
*/
|
|
function isAngularCorePackage(program: ts.Program): boolean {
|
|
// Look for its_just_angular.ts somewhere in the program.
|
|
const r3Symbols = getR3SymbolsFile(program);
|
|
if (r3Symbols === null) {
|
|
return false;
|
|
}
|
|
|
|
// Look for the constant ITS_JUST_ANGULAR in that file.
|
|
return r3Symbols.statements.some(stmt => {
|
|
// The statement must be a variable declaration statement.
|
|
if (!ts.isVariableStatement(stmt)) {
|
|
return false;
|
|
}
|
|
// It must be exported.
|
|
if (stmt.modifiers === undefined ||
|
|
!stmt.modifiers.some(mod => mod.kind === ts.SyntaxKind.ExportKeyword)) {
|
|
return false;
|
|
}
|
|
// It must declare ITS_JUST_ANGULAR.
|
|
return stmt.declarationList.declarations.some(decl => {
|
|
// The declaration must match the name.
|
|
if (!ts.isIdentifier(decl.name) || decl.name.text !== 'ITS_JUST_ANGULAR') {
|
|
return false;
|
|
}
|
|
// It must initialize the variable to true.
|
|
if (decl.initializer === undefined || decl.initializer.kind !== ts.SyntaxKind.TrueKeyword) {
|
|
return false;
|
|
}
|
|
// This definition matches.
|
|
return true;
|
|
});
|
|
});
|
|
}
|
|
|
|
export class ReferenceGraphAdapter implements ReferencesRegistry {
|
|
constructor(private graph: ReferenceGraph) {}
|
|
|
|
add(source: ts.Declaration, ...references: Reference<ts.Declaration>[]): void {
|
|
for (const {node} of references) {
|
|
let sourceFile = node.getSourceFile();
|
|
if (sourceFile === undefined) {
|
|
sourceFile = ts.getOriginalNode(node).getSourceFile();
|
|
}
|
|
|
|
// Only record local references (not references into .d.ts files).
|
|
if (sourceFile === undefined || !isDtsPath(sourceFile.fileName)) {
|
|
this.graph.add(source, node);
|
|
}
|
|
}
|
|
}
|
|
}
|