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program.ts
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program.ts
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/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {GeneratedFile} from '@angular/compiler';
import * as ts from 'typescript';
import * as api from '../transformers/api';
import {nocollapseHack} from '../transformers/nocollapse_hack';
import {verifySupportedTypeScriptVersion} from '../typescript_support';
import {ComponentDecoratorHandler, DirectiveDecoratorHandler, InjectableDecoratorHandler, NgModuleDecoratorHandler, NoopReferencesRegistry, PipeDecoratorHandler, ReferencesRegistry} from './annotations';
import {CycleAnalyzer, ImportGraph} from './cycles';
import {ErrorCode, ngErrorCode} from './diagnostics';
import {FlatIndexGenerator, ReferenceGraph, checkForPrivateExports, findFlatIndexEntryPoint} from './entry_point';
import {AbsoluteFsPath, LogicalFileSystem, absoluteFrom} from './file_system';
import {AbsoluteModuleStrategy, AliasStrategy, AliasingHost, DefaultImportTracker, FileToModuleAliasingHost, FileToModuleHost, FileToModuleStrategy, ImportRewriter, LocalIdentifierStrategy, LogicalProjectStrategy, ModuleResolver, NoopImportRewriter, PrivateExportAliasingHost, R3SymbolsImportRewriter, Reference, ReferenceEmitStrategy, ReferenceEmitter, RelativePathStrategy} from './imports';
import {IncrementalState} from './incremental';
import {IndexedComponent, IndexingContext} from './indexer';
import {generateAnalysis} from './indexer/src/transform';
import {CompoundMetadataReader, CompoundMetadataRegistry, DtsMetadataReader, LocalMetadataRegistry, MetadataReader} from './metadata';
import {PartialEvaluator} from './partial_evaluator';
import {NOOP_PERF_RECORDER, PerfRecorder, PerfTracker} from './perf';
import {TypeScriptReflectionHost} from './reflection';
import {HostResourceLoader} from './resource_loader';
import {NgModuleRouteAnalyzer, entryPointKeyFor} from './routing';
import {CompoundComponentScopeReader, LocalModuleScopeRegistry, MetadataDtsModuleScopeResolver} from './scope';
import {FactoryGenerator, FactoryInfo, GeneratedShimsHostWrapper, ShimGenerator, SummaryGenerator, TypeCheckShimGenerator, generatedFactoryTransform} from './shims';
import {ivySwitchTransform} from './switch';
import {IvyCompilation, declarationTransformFactory, ivyTransformFactory} from './transform';
import {aliasTransformFactory} from './transform/src/alias';
import {TypeCheckContext, TypeCheckingConfig, typeCheckFilePath} from './typecheck';
import {normalizeSeparators} from './util/src/path';
import {getRootDirs, getSourceFileOrNull, isDtsPath, resolveModuleName} from './util/src/typescript';
export class NgtscProgram implements api.Program {
private tsProgram: ts.Program;
private reuseTsProgram: ts.Program;
private resourceManager: HostResourceLoader;
private compilation: IvyCompilation|undefined = undefined;
private factoryToSourceInfo: Map<string, FactoryInfo>|null = null;
private sourceToFactorySymbols: Map<string, Set<string>>|null = null;
private _coreImportsFrom: ts.SourceFile|null|undefined = undefined;
private _importRewriter: ImportRewriter|undefined = undefined;
private _reflector: TypeScriptReflectionHost|undefined = undefined;
private _isCore: boolean|undefined = undefined;
private rootDirs: AbsoluteFsPath[];
private closureCompilerEnabled: boolean;
private entryPoint: ts.SourceFile|null;
private exportReferenceGraph: ReferenceGraph|null = null;
private flatIndexGenerator: FlatIndexGenerator|null = null;
private routeAnalyzer: NgModuleRouteAnalyzer|null = null;
private constructionDiagnostics: ts.Diagnostic[] = [];
private moduleResolver: ModuleResolver;
private cycleAnalyzer: CycleAnalyzer;
private metaReader: MetadataReader|null = null;
private aliasingHost: AliasingHost|null = null;
private refEmitter: ReferenceEmitter|null = null;
private fileToModuleHost: FileToModuleHost|null = null;
private defaultImportTracker: DefaultImportTracker;
private perfRecorder: PerfRecorder = NOOP_PERF_RECORDER;
private perfTracker: PerfTracker|null = null;
private incrementalState: IncrementalState;
private typeCheckFilePath: AbsoluteFsPath;
private modifiedResourceFiles: Set<string>|null;
constructor(
rootNames: ReadonlyArray<string>, private options: api.CompilerOptions,
private host: api.CompilerHost, oldProgram?: NgtscProgram) {
if (!options.disableTypeScriptVersionCheck) {
verifySupportedTypeScriptVersion();
}
if (shouldEnablePerfTracing(options)) {
this.perfTracker = PerfTracker.zeroedToNow();
this.perfRecorder = this.perfTracker;
}
this.modifiedResourceFiles =
this.host.getModifiedResourceFiles && this.host.getModifiedResourceFiles() || null;
this.rootDirs = getRootDirs(host, options);
this.closureCompilerEnabled = !!options.annotateForClosureCompiler;
this.resourceManager = new HostResourceLoader(host, options);
// TODO(alxhub): remove the fallback to allowEmptyCodegenFiles after verifying that the rest of
// our build tooling is no longer relying on it.
const allowEmptyCodegenFiles = options.allowEmptyCodegenFiles || false;
const shouldGenerateFactoryShims = options.generateNgFactoryShims !== undefined ?
options.generateNgFactoryShims :
allowEmptyCodegenFiles;
const shouldGenerateSummaryShims = options.generateNgSummaryShims !== undefined ?
options.generateNgSummaryShims :
allowEmptyCodegenFiles;
const normalizedRootNames = rootNames.map(n => absoluteFrom(n));
if (host.fileNameToModuleName !== undefined) {
this.fileToModuleHost = host as FileToModuleHost;
}
let rootFiles = [...rootNames];
const generators: ShimGenerator[] = [];
let summaryGenerator: SummaryGenerator|null = null;
if (shouldGenerateSummaryShims) {
// Summary generation.
summaryGenerator = SummaryGenerator.forRootFiles(normalizedRootNames);
generators.push(summaryGenerator);
}
if (shouldGenerateFactoryShims) {
// Factory generation.
const factoryGenerator = FactoryGenerator.forRootFiles(normalizedRootNames);
const factoryFileMap = factoryGenerator.factoryFileMap;
this.factoryToSourceInfo = new Map<string, FactoryInfo>();
this.sourceToFactorySymbols = new Map<string, Set<string>>();
factoryFileMap.forEach((sourceFilePath, factoryPath) => {
const moduleSymbolNames = new Set<string>();
this.sourceToFactorySymbols !.set(sourceFilePath, moduleSymbolNames);
this.factoryToSourceInfo !.set(factoryPath, {sourceFilePath, moduleSymbolNames});
});
const factoryFileNames = Array.from(factoryFileMap.keys());
rootFiles.push(...factoryFileNames);
generators.push(factoryGenerator);
}
// Done separately to preserve the order of factory files before summary files in rootFiles.
// TODO(alxhub): validate that this is necessary.
if (shouldGenerateSummaryShims) {
rootFiles.push(...summaryGenerator !.getSummaryFileNames());
}
this.typeCheckFilePath = typeCheckFilePath(this.rootDirs);
generators.push(new TypeCheckShimGenerator(this.typeCheckFilePath));
rootFiles.push(this.typeCheckFilePath);
let entryPoint: AbsoluteFsPath|null = null;
if (options.flatModuleOutFile != null && options.flatModuleOutFile !== '') {
entryPoint = findFlatIndexEntryPoint(normalizedRootNames);
if (entryPoint === null) {
// This error message talks specifically about having a single .ts file in "files". However
// the actual logic is a bit more permissive. If a single file exists, that will be taken,
// otherwise the highest level (shortest path) "index.ts" file will be used as the flat
// module entry point instead. If neither of these conditions apply, the error below is
// given.
//
// The user is not informed about the "index.ts" option as this behavior is deprecated -
// an explicit entrypoint should always be specified.
this.constructionDiagnostics.push({
category: ts.DiagnosticCategory.Error,
code: ngErrorCode(ErrorCode.CONFIG_FLAT_MODULE_NO_INDEX),
file: undefined,
start: undefined,
length: undefined,
messageText:
'Angular compiler option "flatModuleOutFile" requires one and only one .ts file in the "files" field.',
});
} else {
const flatModuleId = options.flatModuleId || null;
const flatModuleOutFile = normalizeSeparators(options.flatModuleOutFile);
this.flatIndexGenerator =
new FlatIndexGenerator(entryPoint, flatModuleOutFile, flatModuleId);
generators.push(this.flatIndexGenerator);
rootFiles.push(this.flatIndexGenerator.flatIndexPath);
}
}
if (generators.length > 0) {
// FIXME: Remove the any cast once google3 is fully on TS3.6.
this.host = (new GeneratedShimsHostWrapper(host, generators) as any);
}
this.tsProgram =
ts.createProgram(rootFiles, options, this.host, oldProgram && oldProgram.reuseTsProgram);
this.reuseTsProgram = this.tsProgram;
this.entryPoint = entryPoint !== null ? getSourceFileOrNull(this.tsProgram, entryPoint) : null;
this.moduleResolver = new ModuleResolver(this.tsProgram, options, this.host);
this.cycleAnalyzer = new CycleAnalyzer(new ImportGraph(this.moduleResolver));
this.defaultImportTracker = new DefaultImportTracker();
if (oldProgram === undefined) {
this.incrementalState = IncrementalState.fresh();
} else {
this.incrementalState = IncrementalState.reconcile(
oldProgram.incrementalState, oldProgram.reuseTsProgram, this.tsProgram,
this.modifiedResourceFiles);
}
}
getTsProgram(): ts.Program { return this.tsProgram; }
getTsOptionDiagnostics(cancellationToken?: ts.CancellationToken|
undefined): ReadonlyArray<ts.Diagnostic> {
return this.tsProgram.getOptionsDiagnostics(cancellationToken);
}
getNgOptionDiagnostics(cancellationToken?: ts.CancellationToken|
undefined): ReadonlyArray<ts.Diagnostic> {
return this.constructionDiagnostics;
}
getTsSyntacticDiagnostics(
sourceFile?: ts.SourceFile|undefined,
cancellationToken?: ts.CancellationToken|undefined): ReadonlyArray<ts.Diagnostic> {
return this.tsProgram.getSyntacticDiagnostics(sourceFile, cancellationToken);
}
getNgStructuralDiagnostics(cancellationToken?: ts.CancellationToken|
undefined): ReadonlyArray<api.Diagnostic> {
return [];
}
getTsSemanticDiagnostics(
sourceFile?: ts.SourceFile|undefined,
cancellationToken?: ts.CancellationToken|undefined): ReadonlyArray<ts.Diagnostic> {
return this.tsProgram.getSemanticDiagnostics(sourceFile, cancellationToken);
}
getNgSemanticDiagnostics(
fileName?: string|undefined,
cancellationToken?: ts.CancellationToken|undefined): ReadonlyArray<ts.Diagnostic> {
const compilation = this.ensureAnalyzed();
const diagnostics = [...compilation.diagnostics, ...this.getTemplateDiagnostics()];
if (this.entryPoint !== null && this.exportReferenceGraph !== null) {
diagnostics.push(...checkForPrivateExports(
this.entryPoint, this.tsProgram.getTypeChecker(), this.exportReferenceGraph));
}
return diagnostics;
}
async loadNgStructureAsync(): Promise<void> {
if (this.compilation === undefined) {
this.compilation = this.makeCompilation();
}
const analyzeSpan = this.perfRecorder.start('analyze');
await Promise.all(this.tsProgram.getSourceFiles()
.filter(file => !file.fileName.endsWith('.d.ts'))
.map(file => {
const analyzeFileSpan = this.perfRecorder.start('analyzeFile', file);
let analysisPromise = this.compilation !.analyzeAsync(file);
if (analysisPromise === undefined) {
this.perfRecorder.stop(analyzeFileSpan);
} else if (this.perfRecorder.enabled) {
analysisPromise = analysisPromise.then(
() => this.perfRecorder.stop(analyzeFileSpan));
}
return analysisPromise;
})
.filter((result): result is Promise<void> => result !== undefined));
this.perfRecorder.stop(analyzeSpan);
this.compilation.resolve();
}
listLazyRoutes(entryRoute?: string|undefined): api.LazyRoute[] {
if (entryRoute) {
// Note:
// This resolution step is here to match the implementation of the old `AotCompilerHost` (see
// https://github.com/angular/angular/blob/50732e156/packages/compiler-cli/src/transformers/compiler_host.ts#L175-L188).
//
// `@angular/cli` will always call this API with an absolute path, so the resolution step is
// not necessary, but keeping it backwards compatible in case someone else is using the API.
// Relative entry paths are disallowed.
if (entryRoute.startsWith('.')) {
throw new Error(
`Failed to list lazy routes: Resolution of relative paths (${entryRoute}) is not supported.`);
}
// Non-relative entry paths fall into one of the following categories:
// - Absolute system paths (e.g. `/foo/bar/my-project/my-module`), which are unaffected by the
// logic below.
// - Paths to enternal modules (e.g. `some-lib`).
// - Paths mapped to directories in `tsconfig.json` (e.g. `shared/my-module`).
// (See https://www.typescriptlang.org/docs/handbook/module-resolution.html#path-mapping.)
//
// In all cases above, the `containingFile` argument is ignored, so we can just take the first
// of the root files.
const containingFile = this.tsProgram.getRootFileNames()[0];
const [entryPath, moduleName] = entryRoute.split('#');
const resolvedModule = resolveModuleName(entryPath, containingFile, this.options, this.host);
if (resolvedModule) {
entryRoute = entryPointKeyFor(resolvedModule.resolvedFileName, moduleName);
}
}
this.ensureAnalyzed();
return this.routeAnalyzer !.listLazyRoutes(entryRoute);
}
getLibrarySummaries(): Map<string, api.LibrarySummary> {
throw new Error('Method not implemented.');
}
getEmittedGeneratedFiles(): Map<string, GeneratedFile> {
throw new Error('Method not implemented.');
}
getEmittedSourceFiles(): Map<string, ts.SourceFile> {
throw new Error('Method not implemented.');
}
private ensureAnalyzed(): IvyCompilation {
if (this.compilation === undefined) {
const analyzeSpan = this.perfRecorder.start('analyze');
this.compilation = this.makeCompilation();
this.tsProgram.getSourceFiles()
.filter(file => !file.fileName.endsWith('.d.ts'))
.forEach(file => {
const analyzeFileSpan = this.perfRecorder.start('analyzeFile', file);
this.compilation !.analyzeSync(file);
this.perfRecorder.stop(analyzeFileSpan);
});
this.perfRecorder.stop(analyzeSpan);
this.compilation.resolve();
}
return this.compilation;
}
emit(opts?: {
emitFlags?: api.EmitFlags,
cancellationToken?: ts.CancellationToken,
customTransformers?: api.CustomTransformers,
emitCallback?: api.TsEmitCallback,
mergeEmitResultsCallback?: api.TsMergeEmitResultsCallback
}): ts.EmitResult {
const emitCallback = opts && opts.emitCallback || defaultEmitCallback;
const compilation = this.ensureAnalyzed();
const writeFile: ts.WriteFileCallback =
(fileName: string, data: string, writeByteOrderMark: boolean,
onError: ((message: string) => void) | undefined,
sourceFiles: ReadonlyArray<ts.SourceFile>| undefined) => {
if (this.closureCompilerEnabled && fileName.endsWith('.js')) {
data = nocollapseHack(data);
}
this.host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles);
};
const customTransforms = opts && opts.customTransformers;
const beforeTransforms = [
ivyTransformFactory(
compilation, this.reflector, this.importRewriter, this.defaultImportTracker, this.isCore,
this.closureCompilerEnabled),
aliasTransformFactory(compilation.exportStatements) as ts.TransformerFactory<ts.SourceFile>,
this.defaultImportTracker.importPreservingTransformer(),
];
const afterDeclarationsTransforms = [
declarationTransformFactory(compilation),
];
// Only add aliasing re-exports to the .d.ts output if the `AliasingHost` requests it.
if (this.aliasingHost !== null && this.aliasingHost.aliasExportsInDts) {
afterDeclarationsTransforms.push(aliasTransformFactory(compilation.exportStatements));
}
if (this.factoryToSourceInfo !== null) {
beforeTransforms.push(
generatedFactoryTransform(this.factoryToSourceInfo, this.importRewriter));
}
beforeTransforms.push(ivySwitchTransform);
if (customTransforms && customTransforms.beforeTs) {
beforeTransforms.push(...customTransforms.beforeTs);
}
const emitSpan = this.perfRecorder.start('emit');
const emitResults: ts.EmitResult[] = [];
const typeCheckFile = getSourceFileOrNull(this.tsProgram, this.typeCheckFilePath);
for (const targetSourceFile of this.tsProgram.getSourceFiles()) {
if (targetSourceFile.isDeclarationFile || targetSourceFile === typeCheckFile) {
continue;
}
if (this.incrementalState.safeToSkip(targetSourceFile)) {
continue;
}
const fileEmitSpan = this.perfRecorder.start('emitFile', targetSourceFile);
emitResults.push(emitCallback({
targetSourceFile,
program: this.tsProgram,
host: this.host,
options: this.options,
emitOnlyDtsFiles: false, writeFile,
customTransformers: {
before: beforeTransforms,
after: customTransforms && customTransforms.afterTs,
afterDeclarations: afterDeclarationsTransforms,
},
}));
this.perfRecorder.stop(fileEmitSpan);
}
this.perfRecorder.stop(emitSpan);
if (this.perfTracker !== null && this.options.tracePerformance !== undefined) {
this.perfTracker.serializeToFile(this.options.tracePerformance, this.host);
}
// Run the emit, including a custom transformer that will downlevel the Ivy decorators in code.
return ((opts && opts.mergeEmitResultsCallback) || mergeEmitResults)(emitResults);
}
private getTemplateDiagnostics(): ReadonlyArray<ts.Diagnostic> {
// Skip template type-checking if it's disabled.
if (this.options.ivyTemplateTypeCheck === false &&
this.options.fullTemplateTypeCheck !== true) {
return [];
}
const compilation = this.ensureAnalyzed();
// Run template type-checking.
// First select a type-checking configuration, based on whether full template type-checking is
// requested.
let typeCheckingConfig: TypeCheckingConfig;
if (this.options.fullTemplateTypeCheck) {
const strictTemplates = !!this.options.strictTemplates;
typeCheckingConfig = {
applyTemplateContextGuards: strictTemplates,
checkQueries: false,
checkTemplateBodies: true,
checkTypeOfInputBindings: strictTemplates,
strictNullInputBindings: strictTemplates,
checkTypeOfAttributes: strictTemplates,
// Even in full template type-checking mode, DOM binding checks are not quite ready yet.
checkTypeOfDomBindings: false,
checkTypeOfOutputEvents: strictTemplates,
checkTypeOfAnimationEvents: strictTemplates,
// Checking of DOM events currently has an adverse effect on developer experience,
// e.g. for `<input (blur)="update($event.target.value)">` enabling this check results in:
// - error TS2531: Object is possibly 'null'.
// - error TS2339: Property 'value' does not exist on type 'EventTarget'.
checkTypeOfDomEvents: strictTemplates,
checkTypeOfDomReferences: strictTemplates,
// Non-DOM references have the correct type in View Engine so there is no strictness flag.
checkTypeOfNonDomReferences: true,
// Pipes are checked in View Engine so there is no strictness flag.
checkTypeOfPipes: true,
strictSafeNavigationTypes: strictTemplates,
};
} else {
typeCheckingConfig = {
applyTemplateContextGuards: false,
checkQueries: false,
checkTemplateBodies: false,
checkTypeOfInputBindings: false,
strictNullInputBindings: false,
checkTypeOfAttributes: false,
checkTypeOfDomBindings: false,
checkTypeOfOutputEvents: false,
checkTypeOfAnimationEvents: false,
checkTypeOfDomEvents: false,
checkTypeOfDomReferences: false,
checkTypeOfNonDomReferences: false,
checkTypeOfPipes: false,
strictSafeNavigationTypes: false,
};
}
// Apply explicitly configured strictness flags on top of the default configuration
// based on "fullTemplateTypeCheck".
if (this.options.strictInputTypes !== undefined) {
typeCheckingConfig.checkTypeOfInputBindings = this.options.strictInputTypes;
typeCheckingConfig.applyTemplateContextGuards = this.options.strictInputTypes;
}
if (this.options.strictNullInputTypes !== undefined) {
typeCheckingConfig.strictNullInputBindings = this.options.strictNullInputTypes;
}
if (this.options.strictOutputEventTypes !== undefined) {
typeCheckingConfig.checkTypeOfOutputEvents = this.options.strictOutputEventTypes;
typeCheckingConfig.checkTypeOfAnimationEvents = this.options.strictOutputEventTypes;
}
if (this.options.strictDomEventTypes !== undefined) {
typeCheckingConfig.checkTypeOfDomEvents = this.options.strictDomEventTypes;
}
if (this.options.strictSafeNavigationTypes !== undefined) {
typeCheckingConfig.strictSafeNavigationTypes = this.options.strictSafeNavigationTypes;
}
if (this.options.strictDomLocalRefTypes !== undefined) {
typeCheckingConfig.checkTypeOfDomReferences = this.options.strictDomLocalRefTypes;
}
if (this.options.strictAttributeTypes !== undefined) {
typeCheckingConfig.checkTypeOfAttributes = this.options.strictAttributeTypes;
}
// Execute the typeCheck phase of each decorator in the program.
const prepSpan = this.perfRecorder.start('typeCheckPrep');
const ctx = new TypeCheckContext(typeCheckingConfig, this.refEmitter !, this.typeCheckFilePath);
compilation.typeCheck(ctx);
this.perfRecorder.stop(prepSpan);
// Get the diagnostics.
const typeCheckSpan = this.perfRecorder.start('typeCheckDiagnostics');
const {diagnostics, program} =
ctx.calculateTemplateDiagnostics(this.tsProgram, this.host, this.options);
this.perfRecorder.stop(typeCheckSpan);
this.reuseTsProgram = program;
return diagnostics;
}
getIndexedComponents(): Map<ts.Declaration, IndexedComponent> {
const compilation = this.ensureAnalyzed();
const context = new IndexingContext();
compilation.index(context);
return generateAnalysis(context);
}
private makeCompilation(): IvyCompilation {
const checker = this.tsProgram.getTypeChecker();
// Construct the ReferenceEmitter.
if (this.fileToModuleHost === null || !this.options._useHostForImportGeneration) {
let localImportStrategy: ReferenceEmitStrategy;
// The strategy used for local, in-project imports depends on whether TS has been configured
// with rootDirs. If so, then multiple directories may be mapped in the same "module
// namespace" and the logic of `LogicalProjectStrategy` is required to generate correct
// imports which may cross these multiple directories. Otherwise, plain relative imports are
// sufficient.
if (this.options.rootDir !== undefined ||
(this.options.rootDirs !== undefined && this.options.rootDirs.length > 0)) {
// rootDirs logic is in effect - use the `LogicalProjectStrategy` for in-project relative
// imports.
localImportStrategy =
new LogicalProjectStrategy(this.reflector, new LogicalFileSystem(this.rootDirs));
} else {
// Plain relative imports are all that's needed.
localImportStrategy = new RelativePathStrategy(this.reflector);
}
// The CompilerHost doesn't have fileNameToModuleName, so build an NPM-centric reference
// resolution strategy.
this.refEmitter = new ReferenceEmitter([
// First, try to use local identifiers if available.
new LocalIdentifierStrategy(),
// Next, attempt to use an absolute import.
new AbsoluteModuleStrategy(
this.tsProgram, checker, this.options, this.host, this.reflector),
// Finally, check if the reference is being written into a file within the project's .ts
// sources, and use a relative import if so. If this fails, ReferenceEmitter will throw
// an error.
localImportStrategy,
]);
// If an entrypoint is present, then all user imports should be directed through the
// entrypoint and private exports are not needed. The compiler will validate that all publicly
// visible directives/pipes are importable via this entrypoint.
if (this.entryPoint === null && this.options.generateDeepReexports === true) {
// No entrypoint is present and deep re-exports were requested, so configure the aliasing
// system to generate them.
this.aliasingHost = new PrivateExportAliasingHost(this.reflector);
}
} else {
// The CompilerHost supports fileNameToModuleName, so use that to emit imports.
this.refEmitter = new ReferenceEmitter([
// First, try to use local identifiers if available.
new LocalIdentifierStrategy(),
// Then use aliased references (this is a workaround to StrictDeps checks).
new AliasStrategy(),
// Then use fileNameToModuleName to emit imports.
new FileToModuleStrategy(this.reflector, this.fileToModuleHost),
]);
this.aliasingHost = new FileToModuleAliasingHost(this.fileToModuleHost);
}
const evaluator = new PartialEvaluator(this.reflector, checker, this.incrementalState);
const dtsReader = new DtsMetadataReader(checker, this.reflector);
const localMetaRegistry = new LocalMetadataRegistry();
const localMetaReader = new CompoundMetadataReader([localMetaRegistry, this.incrementalState]);
const depScopeReader = new MetadataDtsModuleScopeResolver(dtsReader, this.aliasingHost);
const scopeRegistry = new LocalModuleScopeRegistry(
localMetaReader, depScopeReader, this.refEmitter, this.aliasingHost, this.incrementalState);
const scopeReader = new CompoundComponentScopeReader([scopeRegistry, this.incrementalState]);
const metaRegistry =
new CompoundMetadataRegistry([localMetaRegistry, scopeRegistry, this.incrementalState]);
this.metaReader = new CompoundMetadataReader([localMetaReader, dtsReader]);
// If a flat module entrypoint was specified, then track references via a `ReferenceGraph` in
// order to produce proper diagnostics for incorrectly exported directives/pipes/etc. If there
// is no flat module entrypoint then don't pay the cost of tracking references.
let referencesRegistry: ReferencesRegistry;
if (this.entryPoint !== null) {
this.exportReferenceGraph = new ReferenceGraph();
referencesRegistry = new ReferenceGraphAdapter(this.exportReferenceGraph);
} else {
referencesRegistry = new NoopReferencesRegistry();
}
this.routeAnalyzer = new NgModuleRouteAnalyzer(this.moduleResolver, evaluator);
// Set up the IvyCompilation, which manages state for the Ivy transformer.
const handlers = [
new ComponentDecoratorHandler(
this.reflector, evaluator, metaRegistry, this.metaReader !, scopeReader, scopeRegistry,
this.isCore, this.resourceManager, this.rootDirs,
this.options.preserveWhitespaces || false, this.options.i18nUseExternalIds !== false,
this.getI18nLegacyMessageFormat(), this.moduleResolver, this.cycleAnalyzer,
this.refEmitter, this.defaultImportTracker, this.incrementalState),
new DirectiveDecoratorHandler(
this.reflector, evaluator, metaRegistry, this.defaultImportTracker, this.isCore),
new InjectableDecoratorHandler(
this.reflector, this.defaultImportTracker, this.isCore,
this.options.strictInjectionParameters || false),
new NgModuleDecoratorHandler(
this.reflector, evaluator, this.metaReader, metaRegistry, scopeRegistry,
referencesRegistry, this.isCore, this.routeAnalyzer, this.refEmitter,
this.defaultImportTracker, this.options.i18nInLocale),
new PipeDecoratorHandler(
this.reflector, evaluator, metaRegistry, this.defaultImportTracker, this.isCore),
];
return new IvyCompilation(
handlers, this.reflector, this.importRewriter, this.incrementalState, this.perfRecorder,
this.sourceToFactorySymbols, scopeRegistry);
}
private getI18nLegacyMessageFormat(): string {
return this.options.enableI18nLegacyMessageIdFormat !== false && this.options.i18nInFormat ||
'';
}
private get reflector(): TypeScriptReflectionHost {
if (this._reflector === undefined) {
this._reflector = new TypeScriptReflectionHost(this.tsProgram.getTypeChecker());
}
return this._reflector;
}
private get coreImportsFrom(): ts.SourceFile|null {
if (this._coreImportsFrom === undefined) {
this._coreImportsFrom = this.isCore && getR3SymbolsFile(this.tsProgram) || null;
}
return this._coreImportsFrom;
}
private get isCore(): boolean {
if (this._isCore === undefined) {
this._isCore = isAngularCorePackage(this.tsProgram);
}
return this._isCore;
}
private get importRewriter(): ImportRewriter {
if (this._importRewriter === undefined) {
const coreImportsFrom = this.coreImportsFrom;
this._importRewriter = coreImportsFrom !== null ?
new R3SymbolsImportRewriter(coreImportsFrom.fileName) :
new NoopImportRewriter();
}
return this._importRewriter;
}
}
const defaultEmitCallback: api.TsEmitCallback =
({program, targetSourceFile, writeFile, cancellationToken, emitOnlyDtsFiles,
customTransformers}) =>
program.emit(
targetSourceFile, writeFile, cancellationToken, emitOnlyDtsFiles, customTransformers);
function mergeEmitResults(emitResults: ts.EmitResult[]): ts.EmitResult {
const diagnostics: ts.Diagnostic[] = [];
let emitSkipped = false;
const emittedFiles: string[] = [];
for (const er of emitResults) {
diagnostics.push(...er.diagnostics);
emitSkipped = emitSkipped || er.emitSkipped;
emittedFiles.push(...(er.emittedFiles || []));
}
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);
}
}
}
}
function shouldEnablePerfTracing(options: api.CompilerOptions): boolean {
return options.tracePerformance !== undefined;
}