refactor(compiler): allows synchronous retrieving of metadata (#12908)

Allows non-normalized metadata to be retrieved synchronously.

Related to #7482

modules/@angular/compiler-cli/src/extractor.ts

@@ -34,34 +34,34 @@ export class Extractor {
     const programSymbols: StaticSymbol[] =
         extractProgramSymbols(this.program, this.staticReflector, this.reflectorHost, this.options);
 
-    return compiler
+    const {ngModules, files} = compiler.analyzeAndValidateNgModules(
-        .analyzeNgModules(programSymbols, {transitiveModules: true}, this.metadataResolver)
+        programSymbols, {transitiveModules: true}, this.metadataResolver);
-        .then(({files}) => {
+    return compiler.loadNgModuleDirectives(ngModules).then(() => {
-          const errors: compiler.ParseError[] = [];
+      const errors: compiler.ParseError[] = [];
 
-          files.forEach(file => {
+      files.forEach(file => {
-            const compMetas: compiler.CompileDirectiveMetadata[] = [];
+        const compMetas: compiler.CompileDirectiveMetadata[] = [];
-            file.directives.forEach(directiveType => {
+        file.directives.forEach(directiveType => {
-              const dirMeta = this.metadataResolver.getDirectiveMetadata(directiveType);
+          const dirMeta = this.metadataResolver.getDirectiveMetadata(directiveType);
-              if (dirMeta && dirMeta.isComponent) {
+          if (dirMeta && dirMeta.isComponent) {
-                compMetas.push(dirMeta);
+            compMetas.push(dirMeta);
-              }
-            });
-            compMetas.forEach(compMeta => {
-              const html = compMeta.template.template;
-              const interpolationConfig =
-                  compiler.InterpolationConfig.fromArray(compMeta.template.interpolation);
-              errors.push(
-                  ...this.messageBundle.updateFromTemplate(html, file.srcUrl, interpolationConfig));
-            });
-          });
-
-          if (errors.length) {
-            throw new Error(errors.map(e => e.toString()).join('\n'));
           }
-
-          return this.messageBundle;
         });
+        compMetas.forEach(compMeta => {
+          const html = compMeta.template.template;
+          const interpolationConfig =
+              compiler.InterpolationConfig.fromArray(compMeta.template.interpolation);
+          errors.push(
+              ...this.messageBundle.updateFromTemplate(html, file.srcUrl, interpolationConfig));
+        });
+      });
+
+      if (errors.length) {
+        throw new Error(errors.map(e => e.toString()).join('\n'));
+      }
+
+      return this.messageBundle;
+    });
   }
 
   static create(

modules/@angular/compiler/src/compile_metadata.ts

@@ -589,7 +589,7 @@ export interface CompileNgModuleDirectiveSummary extends CompileSummary {
   exportedDirectives: CompileIdentifierMetadata[];
   exportedPipes: CompileIdentifierMetadata[];
   exportedModules: CompileNgModuleDirectiveSummary[];
-  loadingPromises: Promise<any>[];
+  directiveLoaders: (() => Promise<void>)[];
 }
 
 export type CompileNgModuleSummary =
@@ -661,7 +661,7 @@ export class CompileNgModuleMetadata implements CompileMetadataWithIdentifier {
       exportedModules: this.exportedModules,
       exportedDirectives: this.exportedDirectives,
       exportedPipes: this.exportedPipes,
-      loadingPromises: this.transitiveModule.loadingPromises
+      directiveLoaders: this.transitiveModule.directiveLoaders
     };
   }
 
@@ -682,7 +682,7 @@ export class CompileNgModuleMetadata implements CompileMetadataWithIdentifier {
       exportedDirectives: this.exportedDirectives,
       exportedPipes: this.exportedPipes,
       exportedModules: this.exportedModules,
-      loadingPromises: this.transitiveModule.loadingPromises
+      directiveLoaders: this.transitiveModule.directiveLoaders
     };
   }
 }
@@ -695,7 +695,7 @@ export class TransitiveCompileNgModuleMetadata {
       public modules: CompileNgModuleInjectorSummary[], public providers: CompileProviderMetadata[],
       public entryComponents: CompileIdentifierMetadata[],
       public directives: CompileIdentifierMetadata[], public pipes: CompileIdentifierMetadata[],
-      public loadingPromises: Promise<any>[]) {
+      public directiveLoaders: (() => Promise<void>)[]) {
     directives.forEach(dir => this.directivesSet.add(dir.reference));
     pipes.forEach(pipe => this.pipesSet.add(pipe.reference));
   }

modules/@angular/compiler/src/metadata_resolver.ts

@@ -146,97 +146,43 @@ export class CompileMetadataResolver {
       return;
     }
     directiveType = resolveForwardRef(directiveType);
-    const dirMeta = this._directiveResolver.resolve(directiveType);
+    const nonNormalizedMetadata = this.getNonNormalizedDirectiveMetadata(directiveType);
-    if (!dirMeta) {
-      return null;
-    }
-    let moduleUrl = staticTypeModuleUrl(directiveType);
 
-    const createDirectiveMetadata = (templateMeta: cpl.CompileTemplateMetadata) => {
+    const createDirectiveMetadata = (templateMetadata: cpl.CompileTemplateMetadata) => {
-      let changeDetectionStrategy: ChangeDetectionStrategy = null;
+      const normalizedDirMeta = new cpl.CompileDirectiveMetadata({
-      let viewProviders: Array<cpl.CompileProviderMetadata|cpl.CompileTypeMetadata|any[]> = [];
+        type: nonNormalizedMetadata.type,
-      let entryComponentMetadata: cpl.CompileIdentifierMetadata[] = [];
+        isComponent: nonNormalizedMetadata.isComponent,
-      let selector = dirMeta.selector;
+        selector: nonNormalizedMetadata.selector,
-
+        exportAs: nonNormalizedMetadata.exportAs,
-      if (dirMeta instanceof Component) {
+        changeDetection: nonNormalizedMetadata.changeDetection,
-        // Component
+        inputs: nonNormalizedMetadata.inputs,
-        changeDetectionStrategy = dirMeta.changeDetection;
+        outputs: nonNormalizedMetadata.outputs,
-        if (dirMeta.viewProviders) {
+        hostListeners: nonNormalizedMetadata.hostListeners,
-          viewProviders = this._getProvidersMetadata(
+        hostProperties: nonNormalizedMetadata.hostProperties,
-              dirMeta.viewProviders, entryComponentMetadata,
+        hostAttributes: nonNormalizedMetadata.hostAttributes,
-              `viewProviders for "${stringify(directiveType)}"`);
+        providers: nonNormalizedMetadata.providers,
-        }
+        viewProviders: nonNormalizedMetadata.viewProviders,
-        if (dirMeta.entryComponents) {
+        queries: nonNormalizedMetadata.queries,
-          entryComponentMetadata =
+        viewQueries: nonNormalizedMetadata.viewQueries,
-              flattenAndDedupeArray(dirMeta.entryComponents)
+        entryComponents: nonNormalizedMetadata.entryComponents,
-                  .map((type) => this._getIdentifierMetadata(type, staticTypeModuleUrl(type)))
+        template: templateMetadata
-                  .concat(entryComponentMetadata);
-        }
-        if (!selector) {
-          selector = this._schemaRegistry.getDefaultComponentElementName();
-        }
-      } else {
-        // Directive
-        if (!selector) {
-          throw new Error(`Directive ${stringify(directiveType)} has no selector, please add it!`);
-        }
-      }
-
-      let providers: Array<cpl.CompileProviderMetadata|cpl.CompileTypeMetadata|any[]> = [];
-      if (isPresent(dirMeta.providers)) {
-        providers = this._getProvidersMetadata(
-            dirMeta.providers, entryComponentMetadata,
-            `providers for "${stringify(directiveType)}"`);
-      }
-      let queries: cpl.CompileQueryMetadata[] = [];
-      let viewQueries: cpl.CompileQueryMetadata[] = [];
-      if (isPresent(dirMeta.queries)) {
-        queries = this._getQueriesMetadata(dirMeta.queries, false, directiveType);
-        viewQueries = this._getQueriesMetadata(dirMeta.queries, true, directiveType);
-      }
-
-      const meta = cpl.CompileDirectiveMetadata.create({
-        selector: selector,
-        exportAs: dirMeta.exportAs,
-        isComponent: !!templateMeta,
-        type: this._getTypeMetadata(directiveType, moduleUrl),
-        template: templateMeta,
-        changeDetection: changeDetectionStrategy,
-        inputs: dirMeta.inputs,
-        outputs: dirMeta.outputs,
-        host: dirMeta.host,
-        providers: providers,
-        viewProviders: viewProviders,
-        queries: queries,
-        viewQueries: viewQueries,
-        entryComponents: entryComponentMetadata
       });
-      this._directiveCache.set(directiveType, meta);
+      this._directiveCache.set(directiveType, normalizedDirMeta);
-      this._directiveSummaryCache.set(directiveType, meta.toSummary());
+      this._directiveSummaryCache.set(directiveType, normalizedDirMeta.toSummary());
-      return meta;
+      return normalizedDirMeta;
     };
 
-    if (dirMeta instanceof Component) {
+    if (nonNormalizedMetadata.isComponent) {
-      // component
-      moduleUrl = componentModuleUrl(this._reflector, directiveType, dirMeta);
-      assertArrayOfStrings('styles', dirMeta.styles);
-      assertArrayOfStrings('styleUrls', dirMeta.styleUrls);
-      assertInterpolationSymbols('interpolation', dirMeta.interpolation);
-
-      const animations = dirMeta.animations ?
-          dirMeta.animations.map(e => this.getAnimationEntryMetadata(e)) :
-          null;
-
       const templateMeta = this._directiveNormalizer.normalizeTemplate({
         componentType: directiveType,
-        moduleUrl: moduleUrl,
+        moduleUrl: nonNormalizedMetadata.type.moduleUrl,
-        encapsulation: dirMeta.encapsulation,
+        encapsulation: nonNormalizedMetadata.template.encapsulation,
-        template: dirMeta.template,
+        template: nonNormalizedMetadata.template.template,
-        templateUrl: dirMeta.templateUrl,
+        templateUrl: nonNormalizedMetadata.template.templateUrl,
-        styles: dirMeta.styles,
+        styles: nonNormalizedMetadata.template.styles,
-        styleUrls: dirMeta.styleUrls,
+        styleUrls: nonNormalizedMetadata.template.styleUrls,
-        animations: animations,
+        animations: nonNormalizedMetadata.template.animations,
-        interpolation: dirMeta.interpolation
+        interpolation: nonNormalizedMetadata.template.interpolation
       });
       if (templateMeta.syncResult) {
         createDirectiveMetadata(templateMeta.syncResult);
@@ -254,6 +200,96 @@ export class CompileMetadataResolver {
     }
   }
 
+  getNonNormalizedDirectiveMetadata(directiveType: any): cpl.CompileDirectiveMetadata {
+    directiveType = resolveForwardRef(directiveType);
+    const dirMeta = this._directiveResolver.resolve(directiveType);
+    if (!dirMeta) {
+      return null;
+    }
+    let moduleUrl = staticTypeModuleUrl(directiveType);
+    let nonNormalizedTemplateMetadata: cpl.CompileTemplateMetadata;
+
+    if (dirMeta instanceof Component) {
+      // component
+      moduleUrl = componentModuleUrl(this._reflector, directiveType, dirMeta);
+      assertArrayOfStrings('styles', dirMeta.styles);
+      assertArrayOfStrings('styleUrls', dirMeta.styleUrls);
+      assertInterpolationSymbols('interpolation', dirMeta.interpolation);
+
+      const animations = dirMeta.animations ?
+          dirMeta.animations.map(e => this.getAnimationEntryMetadata(e)) :
+          null;
+
+      nonNormalizedTemplateMetadata = new cpl.CompileTemplateMetadata({
+        encapsulation: dirMeta.encapsulation,
+        template: dirMeta.template,
+        templateUrl: dirMeta.templateUrl,
+        styles: dirMeta.styles,
+        styleUrls: dirMeta.styleUrls,
+        animations: animations,
+        interpolation: dirMeta.interpolation
+      });
+    }
+
+    let changeDetectionStrategy: ChangeDetectionStrategy = null;
+    let viewProviders: Array<cpl.CompileProviderMetadata|cpl.CompileTypeMetadata|any[]> = [];
+    let entryComponentMetadata: cpl.CompileIdentifierMetadata[] = [];
+    let selector = dirMeta.selector;
+
+    if (dirMeta instanceof Component) {
+      // Component
+      changeDetectionStrategy = dirMeta.changeDetection;
+      if (dirMeta.viewProviders) {
+        viewProviders = this._getProvidersMetadata(
+            dirMeta.viewProviders, entryComponentMetadata,
+            `viewProviders for "${stringify(directiveType)}"`);
+      }
+      if (dirMeta.entryComponents) {
+        entryComponentMetadata =
+            flattenAndDedupeArray(dirMeta.entryComponents)
+                .map((type) => this._getIdentifierMetadata(type, staticTypeModuleUrl(type)))
+                .concat(entryComponentMetadata);
+      }
+      if (!selector) {
+        selector = this._schemaRegistry.getDefaultComponentElementName();
+      }
+    } else {
+      // Directive
+      if (!selector) {
+        throw new Error(`Directive ${stringify(directiveType)} has no selector, please add it!`);
+      }
+    }
+
+    let providers: Array<cpl.CompileProviderMetadata|cpl.CompileTypeMetadata|any[]> = [];
+    if (isPresent(dirMeta.providers)) {
+      providers = this._getProvidersMetadata(
+          dirMeta.providers, entryComponentMetadata, `providers for "${stringify(directiveType)}"`);
+    }
+    let queries: cpl.CompileQueryMetadata[] = [];
+    let viewQueries: cpl.CompileQueryMetadata[] = [];
+    if (isPresent(dirMeta.queries)) {
+      queries = this._getQueriesMetadata(dirMeta.queries, false, directiveType);
+      viewQueries = this._getQueriesMetadata(dirMeta.queries, true, directiveType);
+    }
+
+    return cpl.CompileDirectiveMetadata.create({
+      selector: selector,
+      exportAs: dirMeta.exportAs,
+      isComponent: !!nonNormalizedTemplateMetadata,
+      type: this._getTypeMetadata(directiveType, moduleUrl),
+      template: nonNormalizedTemplateMetadata,
+      changeDetection: changeDetectionStrategy,
+      inputs: dirMeta.inputs,
+      outputs: dirMeta.outputs,
+      host: dirMeta.host,
+      providers: providers,
+      viewProviders: viewProviders,
+      queries: queries,
+      viewQueries: viewQueries,
+      entryComponents: entryComponentMetadata
+    });
+  }
+
   /**
    * Gets the metadata for the given directive.
    * This assumes `loadNgModuleMetadata` has been called first.
@@ -309,11 +345,20 @@ export class CompileMetadataResolver {
   loadNgModuleMetadata(moduleType: any, isSync: boolean, throwIfNotFound = true):
       {ngModule: cpl.CompileNgModuleMetadata, loading: Promise<any>} {
     const ngModule = this._loadNgModuleMetadata(moduleType, isSync, throwIfNotFound);
-    const loading =
+    const loading = ngModule ?
-        ngModule ? Promise.all(ngModule.transitiveModule.loadingPromises) : Promise.resolve(null);
+        Promise.all(ngModule.transitiveModule.directiveLoaders.map(loader => loader())) :
+        Promise.resolve(null);
     return {ngModule, loading};
   }
 
+  /**
+   * Get the NgModule metadata without loading the directives.
+   */
+  getUnloadedNgModuleMetadata(moduleType: any, isSync: boolean, throwIfNotFound = true):
+      cpl.CompileNgModuleMetadata {
+    return this._loadNgModuleMetadata(moduleType, isSync, throwIfNotFound);
+  }
+
   private _loadNgModuleMetadata(moduleType: any, isSync: boolean, throwIfNotFound = true):
       cpl.CompileNgModuleMetadata {
     moduleType = resolveForwardRef(moduleType);
@@ -396,10 +441,8 @@ export class CompileMetadataResolver {
           transitiveModule.directives.push(declaredIdentifier);
           declaredDirectives.push(declaredIdentifier);
           this._addTypeToModule(declaredType, moduleType);
-          const loadingPromise = this._loadDirectiveMetadata(declaredType, isSync);
+          transitiveModule.directiveLoaders.push(
-          if (loadingPromise) {
+              () => this._loadDirectiveMetadata(declaredType, isSync));
-            transitiveModule.loadingPromises.push(loadingPromise);
-          }
         } else if (this._pipeResolver.isPipe(declaredType)) {
           transitiveModule.pipesSet.add(declaredType);
           transitiveModule.pipes.push(declaredIdentifier);
@@ -525,10 +568,10 @@ export class CompileMetadataResolver {
     const directives =
         flattenArray(transitiveExportedModules.map((ngModule) => ngModule.exportedDirectives));
     const pipes = flattenArray(transitiveExportedModules.map((ngModule) => ngModule.exportedPipes));
-    const loadingPromises =
+    const directiveLoaders =
-        ListWrapper.flatten(transitiveExportedModules.map(ngModule => ngModule.loadingPromises));
+        ListWrapper.flatten(transitiveExportedModules.map(ngModule => ngModule.directiveLoaders));
     return new cpl.TransitiveCompileNgModuleMetadata(
-        transitiveModules, providers, entryComponents, directives, pipes, loadingPromises);
+        transitiveModules, providers, entryComponents, directives, pipes, directiveLoaders);
   }
 
   private _getIdentifierMetadata(type: Type<any>, moduleUrl: string):
@@ -584,20 +627,26 @@ export class CompileMetadataResolver {
     return pipeSummary;
   }
 
-  private _loadPipeMetadata(pipeType: Type<any>): void {
+  getOrLoadPipeMetadata(pipeType: any): cpl.CompilePipeMetadata {
-    pipeType = resolveForwardRef(pipeType);
+    let pipeMeta = this._pipeCache.get(pipeType);
-    const pipeMeta = this._pipeResolver.resolve(pipeType);
     if (!pipeMeta) {
-      return null;
+      pipeMeta = this._loadPipeMetadata(pipeType);
     }
+    return pipeMeta;
+  }
 
-    const meta = new cpl.CompilePipeMetadata({
+  private _loadPipeMetadata(pipeType: any): cpl.CompilePipeMetadata {
+    pipeType = resolveForwardRef(pipeType);
+    const pipeAnnotation = this._pipeResolver.resolve(pipeType);
+
+    const pipeMeta = new cpl.CompilePipeMetadata({
       type: this._getTypeMetadata(pipeType, staticTypeModuleUrl(pipeType)),
-      name: pipeMeta.name,
+      name: pipeAnnotation.name,
-      pure: pipeMeta.pure
+      pure: pipeAnnotation.pure
     });
-    this._pipeCache.set(pipeType, meta);
+    this._pipeCache.set(pipeType, pipeMeta);
-    this._pipeSummaryCache.set(pipeType, meta.toSummary());
+    this._pipeSummaryCache.set(pipeType, pipeMeta.toSummary());
+    return pipeMeta;
   }
 
   private _getDependenciesMetadata(typeOrFunc: Type<any>|Function, dependencies: any[]):

modules/@angular/compiler/src/offline_compiler.ts

@@ -27,17 +27,46 @@ export class SourceModule {
   constructor(public fileUrl: string, public moduleUrl: string, public source: string) {}
 }
 
+export interface NgAnalyzedModules {
+  ngModules: CompileNgModuleMetadata[];
+  ngModuleByPipeOrDirective: Map<StaticSymbol, CompileNgModuleMetadata>;
+  files: Array<{srcUrl: string, directives: StaticSymbol[], ngModules: StaticSymbol[]}>;
+  symbolsMissingModule?: StaticSymbol[];
+}
+
 // Returns all the source files and a mapping from modules to directives
 export function analyzeNgModules(
     programStaticSymbols: StaticSymbol[], options: {transitiveModules: boolean},
-    metadataResolver: CompileMetadataResolver): Promise<{
+    metadataResolver: CompileMetadataResolver): NgAnalyzedModules {
-  ngModuleByPipeOrDirective: Map<StaticSymbol, CompileNgModuleMetadata>,
+  const {ngModules, symbolsMissingModule} =
-  files: Array<{srcUrl: string, directives: StaticSymbol[], ngModules: StaticSymbol[]}>
+      _createNgModules(programStaticSymbols, options, metadataResolver);
-}> {
+  return _analyzeNgModules(ngModules, symbolsMissingModule);
-  return _loadNgModules(programStaticSymbols, options, metadataResolver).then(_analyzeNgModules);
 }
 
-function _analyzeNgModules(ngModuleMetas: CompileNgModuleMetadata[]) {
+
+export function analyzeAndValidateNgModules(
+    programStaticSymbols: StaticSymbol[], options: {transitiveModules: boolean},
+    metadataResolver: CompileMetadataResolver): NgAnalyzedModules {
+  const result = analyzeNgModules(programStaticSymbols, options, metadataResolver);
+  if (result.symbolsMissingModule && result.symbolsMissingModule.length) {
+    const messages = result.symbolsMissingModule.map(
+        s => `Cannot determine the module for class ${s.name} in ${s.filePath}!`);
+    throw new Error(messages.join('\n'));
+  }
+  return result;
+}
+
+// Wait for the directives in the given modules have been loaded
+export function loadNgModuleDirectives(ngModules: CompileNgModuleMetadata[]) {
+  return Promise
+      .all(ListWrapper.flatten(ngModules.map(
+          (ngModule) => ngModule.transitiveModule.directiveLoaders.map(loader => loader()))))
+      .then(() => {});
+}
+
+function _analyzeNgModules(
+    ngModuleMetas: CompileNgModuleMetadata[],
+    symbolsMissingModule: StaticSymbol[]): NgAnalyzedModules {
   const moduleMetasByRef = new Map<any, CompileNgModuleMetadata>();
   ngModuleMetas.forEach((ngModule) => moduleMetasByRef.set(ngModule.type.reference, ngModule));
   const ngModuleByPipeOrDirective = new Map<StaticSymbol, CompileNgModuleMetadata>();
@@ -78,10 +107,11 @@ function _analyzeNgModules(ngModuleMetas: CompileNgModuleMetadata[]) {
   });
 
   return {
-      // map directive/pipe to module
+    // map directive/pipe to module
-      ngModuleByPipeOrDirective,
+    ngModuleByPipeOrDirective,
-      // list modules and directives for every source file
+    // list modules and directives for every source file
-      files,
+    files,
+    ngModules: ngModuleMetas, symbolsMissingModule
   };
 }
 
@@ -100,13 +130,14 @@ export class OfflineCompiler {
 
   compileModules(staticSymbols: StaticSymbol[], options: {transitiveModules: boolean}):
       Promise<SourceModule[]> {
-    return analyzeNgModules(staticSymbols, options, this._metadataResolver)
+    const {ngModuleByPipeOrDirective, files, ngModules} =
-        .then(({ngModuleByPipeOrDirective, files}) => {
+        analyzeAndValidateNgModules(staticSymbols, options, this._metadataResolver);
-          const sourceModules = files.map(
+    return loadNgModuleDirectives(ngModules).then(() => {
-              file => this._compileSrcFile(
+      const sourceModules = files.map(
-                  file.srcUrl, ngModuleByPipeOrDirective, file.directives, file.ngModules));
+          file => this._compileSrcFile(
-          return ListWrapper.flatten(sourceModules);
+              file.srcUrl, ngModuleByPipeOrDirective, file.directives, file.ngModules));
-        });
+      return ListWrapper.flatten(sourceModules);
+    });
   }
 
   private _compileSrcFile(
@@ -328,22 +359,21 @@ function _splitTypescriptSuffix(path: string): string[] {
 // Load the NgModules and check
 // that all directives / pipes that are present in the program
 // are also declared by a module.
-function _loadNgModules(
+function _createNgModules(
     programStaticSymbols: StaticSymbol[], options: {transitiveModules: boolean},
-    metadataResolver: CompileMetadataResolver): Promise<CompileNgModuleMetadata[]> {
+    metadataResolver: CompileMetadataResolver):
+    {ngModules: CompileNgModuleMetadata[], symbolsMissingModule: StaticSymbol[]} {
   const ngModules = new Map<any, CompileNgModuleMetadata>();
   const programPipesAndDirectives: StaticSymbol[] = [];
   const ngModulePipesAndDirective = new Set<StaticSymbol>();
-  const loadingPromises: Promise<any>[] = [];
 
   const addNgModule = (staticSymbol: any) => {
     if (ngModules.has(staticSymbol)) {
       return false;
     }
-    const {ngModule, loading} = metadataResolver.loadNgModuleMetadata(staticSymbol, false, false);
+    const ngModule = metadataResolver.getUnloadedNgModuleMetadata(staticSymbol, false, false);
     if (ngModule) {
       ngModules.set(ngModule.type.reference, ngModule);
-      loadingPromises.push(loading);
       ngModule.declaredDirectives.forEach((dir) => ngModulePipesAndDirective.add(dir.reference));
       ngModule.declaredPipes.forEach((pipe) => ngModulePipesAndDirective.add(pipe.reference));
       if (options.transitiveModules) {
@@ -364,11 +394,5 @@ function _loadNgModules(
   const symbolsMissingModule =
       programPipesAndDirectives.filter(s => !ngModulePipesAndDirective.has(s));
 
-  if (symbolsMissingModule.length) {
+  return {ngModules: Array.from(ngModules.values()), symbolsMissingModule};
-    const messages = symbolsMissingModule.map(
-        s => `Cannot determine the module for class ${s.name} in ${s.filePath}!`);
-    throw new Error(messages.join('\n'));
-  }
-
-  return Promise.all(loadingPromises).then(() => Array.from(ngModules.values()));
 }